annual report on research activities for year 2002

UNIVERSITY OF MARIBOR

FACULTY OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE

ANNUAL REPORT RESEARCH ACTIVITIES 2002

MARIBOR, APRIL 2003

UNIVERSITY OF MARIBOR FACULTY OF ELECTRICAL

ENGINEERING AND COMPUTER SCIENCE

Smetanova ulica 17, 2000 MARIBOR SLOVENIA

Phone: +386 2 220 70 00 Fax: +386 2 251 11 78

http://www.feri.uni-mb.si

ANNUAL REPORT Research activities 2002

Editor: Prof. Dr. Damjan Zazula

Copy edit: George Yeoman, MA

Database design: Štefan Masič

Word-processing converter design: Dr. Danilo Korže

Photos and text processing: Suzana Pušauer and Jurij Munda

Photos: Gerhard Angleitner, MSc

Typography and cover design: Dr. Miha Završnik and Repro studio OK, d.o.o., Maribor

ISSN 1408-6328

Published by: Faculty of Electrical Engineering and Computer Science,

Maribor

Print: Publishing and Printing Dept. of Technical Faculties of Maribor

Number of copies: 250

Year of publication: April 2003

CONTENTS

FOREWORD ................................................................................................... FW – 4

Study Programs, Options and Concentrations ....................................................... FW – 5

Student Research Grants ...................................................................................... FW – 15

Graduates of the Faculty of Electrical Engineering and Computer Science .......... FW – 16

Masters and PhD Degrees ..................................................................................... FW – 17

Research by Institutes and Laboratories ............................................................... FW – 22

Programme Units ................................................................................................... FW – 24

Overview of Projects and Staff by Research Units ................................................ FW – 35

INSTITUTE OF AUTOMATION ....................................................................... AU – 1

Systems and Control Laboratory ........................................................................... AU – 4

Signal Processing and Remote Control Laboratory ............................................... AU – 12

Process Automation Laboratory ............................................................................. AU – 16

Measurements Laboratory ..................................................................................... AU – 24

Electro–Optical and Sensor Systems Laboratory .................................................. AU – 30

INSTITUTE OF ELECTRONICS ..................................................................... EL – 1

Digital and Information Systems Laboratory .......................................................... EL – 4

Electronic Systems Laboratory .............................................................................. EL – 10

Microcomputer Systems Laboratory ...................................................................... EL – 14

Digital Signal Processing Laboratory ..................................................................... EL – 21

INSTITUTE OF POWER ENGINEERING ....................................................... PE – 1

Electrical Machines Laboratory .............................................................................. PE – 4

Power Engineering Laboratory ............................................................................. PE – 8

Electromechanical Systems Control Laboratory .................................................... PE – 24

Fundamentals and Theory of Electrotechnics Laboratory ..................................... PE – 30

Applied Electromagnetics Laboratory .................................................................... PE – 33

INSTITUTE OF ROBOTICS ............................................................................ RO – 1

Power Electronics Laboratory ................................................................................ RO – 4

Industrial Robotics Laboratory ............................................................................... RO – 7

Kinematics and Simulations Laboratory ................................................................. RO – 17

INSTITUTE OF MATHEMATICS AND PHYSICS ........................................... MP – 1

Applied Mathematics Laboratory ........................................................................... MP – 3

INSTITUTE OF COMPUTER SCIENCE ......................................................... CS – 1

Computer Graphics and Artificial Intelligence Laboratory ...................................... CS – 5

Computer Architecture and Languages Laboratory ............................................... CS – 8

System Design Laboratory ..................................................................................... CS – 14

System Software Laboratory .................................................................................. CS – 29

Heterogenous Computer Systems Laboratory ....................................................... CS – 38

Geometric Modelling and Multimedia Algorithms Laboratory ................................ CS – 44

INSTITUTE OF INFORMATICS ...................................................................... IN – 1

Information Systems Laboratory ............................................................................ IN – 4

Database Technologies Laboratory ....................................................................... IN – 22

Computer Mediated Communication Laboratory ................................................... IN – 31

Real–Time Systems Laboratory ............................................................................. IN – 34

Faculty of Electrical Engineering and Computer Science FW – 1

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Photo: Gerhard Angleitner

FW – 2 Faculty of Electrical Engineering and Computer Science

Faculty of Electrical Engineering and Computer Science

Dean: Prof. Dr. Ivan Rozman

Institute of Automation

Head: Prof. Dr. Karel Jezernik

Institute of Computer Science

Head: Prof. Dr. Viljem Žumer

Institute of Electronics

Head: Prof. Dr. Bogomir Horvat

Institute of Informatics

Head: Prof. Dr. Ivan Rozman

Institute of Robotics


Institute of Telecommunications


Institute of Power

Engineering Head:

Prof. Dr. Ivan Zagradišnik

Institute of

Mathematics and Physics Head:

Prof. Dr. Vitodrag Kumperščak


Prof. Dr. Ivan Rozman Dean

Assoc. Prof. Dr. Zmago Brezočnik

Deputy Dean of Education Prof. Dr. Damjan Zazula

Deputy Dean of Research


FOREWORD

One of the basic aims of the Faculty of Electrical Engineering and Computer Science in Maribor (FERI) is to become both a locally and internationally recognised scientifically creative organisation with quality educational courses. This is why efforts are primarily focused on producing new horizons in the fields of electrical engineering, computer science, information science, telecommunications, and media communications and then to transfer this knowledge to the Slovenian and International areas. In addition, fundamental research work at FERI has also initiated further applied projects that have led to many successful practical implementations.

This faculty's mission is carried out by individual institutes, whose duty it is to take care of complementary scientific disciplines. Our institutes are formulated according to the particular needs of certain educational processes both at university and higher professional levels of study. There are eight different institutes at the FERI: Institute of Automation, Institute of Electronics, Institute of Power Engineering, Institute of Telecommunications, Institute of Robotics, Institute of Mathematics and Physics, Institute of Computer Science, and Institute of Information Science, while a new Institute of Media Communications is being set up. These institutes are further divided into laboratories, each being responsible for development and educational activities as a whole in their specific scientific fields. They also have complete financial autonomy. These laboratories totalling 28 take care of specialized domains within similar research and development activities. Their autonomy is only partial. Whilst institutes should be headed by full professors, the heads of laboratories can be more junior professors.

FERI ranks among the so-called research faculties, which is also evident from the structure of its income. The amount generated by research activities has for several years been as high as 40 % of total income. About 50 % of this amount comes in a so-called programme-project scheme from the Ministry of Education, Science and Sport of the Republic of Slovenia. The remaining 50 % is earned by international project collaboration, in particular by the European Fifth Framework, and also by work in applied and development projects for various contractors in Slovenia and abroad. Other bilateral international projects are quite numerous, although their financial effect is rather low. This is in accordance with the purpose of these projects being mainly a support for the contacts and mobility of researchers from different countries. For the time being, intensive preparative actions are focused on the European 6th Framework Programme.

The management of FERI is convinced that the Faculty’s present scientific orientation has proven successful, therefore it will spare no effort to promote these lines of activities, especially in order to make FERI better known and distinguished within the European Union as well as in other countries of the world. Above all, it supports participation of the Faculty members in international project teams and in all kinds of successful collaboration with business partners.

Dean Prof. Dr. Ivan Rozman


STUDY PROGRAMS, OPTIONS AND CONCENTRATIONS

Undergraduate studies The Faculty of Electrical Engineering and Computer Science offers two separate types of study programs, each leading to a different type of degree: university and professional one. Three study programs with several options are offered towards the university degrees and two study programs towards professional degrees.

The university-degree study program in Electrical Engineering includes the following options:

• Automation with concentrations in: - Production Automation - Process Automation

• Electronics with concentrations in: - Computer Electronics - Telecommunications Electronics

• Power Engineering with concentrations in: - Power Engineering - Electromechanical Systems Control - Electromagnetics

• Mechatronics with concentrations in: - Communications - Regulations - Instrumentation - Actuation - Embedded Systems - Programmable Tracking Systems

The option of Mechatronics is interdisciplinary, supported by the Faculty of Electrical Engineering and Computer Science and by the Faculty of Mechanical Engineering. Also the computer science students are eligible for this option after the first two years completed in computer science.

University-degree studies last nine semesters and include lectures, exercises, and practical placements in industry, with the exception of Mechatronics whose duration is eight semesters. The first two years are the same for all options.


The professional higher education program in Electrical Engineering comprises the following options:

• Automation with concentrations in: - Process Automation - Robotics

• Electronics with concentrations in: - Industrial Electronics - Computer Electronics

• Power Engineering with concentrations in: - Power Engineering - Electromechanical Systems Control - Electromechanical Devices Construction

• Telecommunications

Professional higher education programs last six semesters consisting of lectures and exercises, and an additional semester of practical placements in industry. The first year of studies is common for all options.

Electrical engineering is also offered as a combined interdisciplinary university-degree study of electrical engineering with economics. It is organised by the Faculty of Electrical Engineering and Computer Science and by the Faculty of Business and Economics in Maribor. The duration of studies is eight semesters with about 2/3 major subjects given in electrical engineering and 1/3 major subjects in business and economics.

Graduates of electrical engineering with economics are qualified to proceed with their studies towards masters or PhD degrees either in electrical engineering or in business and economics.

The university-degree study program in Electrical Engineering with Economics includes the following options:

• Automation • Electronics • Power Engineering


Electrical Engineering Studies

University degree studies Studies to professional higher education degrees

PhD

3rd and 4th Year

Masters degree studies - Electrical Engineering

- Electronic Vacuum Technology

2nd Year

1st Year

University degree University degree

Undergraduate studies

- Automation (9 semesters) - Electronics (9 semesters) - Power Engineering (9 semesters) - Mechatronics (8 semesters)

Matura Examination (an external examination)

Undergraduate studies 6 semesters of studies and 1

semester of practice in industry - Automation - Electronics - Power Engineering - Telecommunications

Final examination (an internal examination)


The university-degree study program in Telecommunications consists of two years of study with common fundamental subjects and two additional years with a variety of electives. Therefore, the studies last eight semesters and include lectures, exercises, and practical placements in industry.

Telecommunications Studies

University degree studies

PhD

3rd and 4th Year

Masters degree studies

2nd Year

1st Year

University degree

Undergraduate studies 8 semesters



The university-degree study program in Computer and Information Science includes the following options:

• Software with concentrations in: - Systems - Engineering Informatics

• Information Science with concentrations in: - Business Information Systems - Process Information Systems

University-degree studies last nine semesters and include lectures, exercises, and practical placements in industry. The first two years are the same for all options. After the first two years in computer science studies, students can continue in the mechatronics option within the electrical engineering program.

The professional higher education program in Computer and Information Science comprises the following options:

• Software • Information science • Logic and systems

Professional higher education programs last six semesters consisting of lectures and exercises and an additional semester of practical placements in industry. The first year of studies is common for all options.


Computer and Information Science Studies

University degree studies Studies to professional higher education degrees

PhD

3rd and 4th Year

Master degree studies - Computer and Information Science

2nd Year

1st Year

University degree Professional higher education degree


- Software - Informatics Science


Undergraduate studies 6 semesters of studies and 1 semester of

practice in industry - Logic and Systems - Software - Informatics Science

Final examination (an internal examination)


In academic year 2002/03, a new university studies programme of Media Communications commenced. The curriculum is covered interdisciplinary and co-ordinated by the Faculty of Electrical Engineering and Computer Science of Maribor. The students in senior years are able to specialise in RTV Production and Interactive Graphic Communication, while the total duration of studies is eight semesters. The title received after a successful completion with a diploma work will be a Media Communicologist with University Diploma.

Media Communications

University degree studies

PhD

3rd and 4th Year

Masters degree studies

2nd Year

1st Year

University degree


- RTV Production - Interactive Graphic Communication



Graduate Studies

Graduate studies basically aim at the acquisition of in-depth theoretical and applied knowledge enabling the prospective graduate to carry out independent and creative research in various technical sciences.

Masters degree and PhD studies

In 2002, masters degree and doctoral studies were organised as shown in the preceding diagrams in combination with the undergraduate schemes. It was renewed with additional subjects. All the subjects were also grouped in two subsets: a smaller one contains majors according to different study options, while a bigger group comprises electives. Every student must select at least two majors belonging to his or her study option.

Three graduate programs are currently being offered:

Electrical Engineering including the following options:

• Automation • Electronics • Power Engineering

Electronic Vacuum Technology

Computer and Information Science

For every graduate student entering the first year of studies, their supervisor selects the following:

• the courses that the student will attend and the exams the student will complete • a research project that will be individually assigned to and conducted by the student

The student must collect a minimum of 120 credits during the first two years. Out of this total, 75 credits must be awarded for the examinations, while 45 credits must be awarded for the reports completed on their individual research projects. For every passed exam and publicly presented report on individual research projects, the student is awarded 15 credits.

Terms for Progress

The terms of inscription to the postgraduate studies are specified by the Statute of the University of Maribor and by annual public calls. Other obligations of the students are depicted by labels 2 through 5 in the graphical presentation of university-degree studies.

2―Minimum of 30 credits.


3―The student must pass all the exams during the first two years and present the reports on their individual research work with a minimum average grade of 9 (out of 10). According to the “Regulation of Habilitation Procedure for University Teachers, Scientific Workers and Co-workers” valid at the Faculty of Electrical Engineering and Computer Science, the student's bibliography must be awarded a minimum of 2 points, based on their scientific research activities. Additionally, a recommendation letter from the student's doctoral studies supervisor is requested.

4―According to the “Regulation of Habilitation Procedure for University Teachers, Scientific Workers and Co-workers” valid at the Faculty of Electrical Engineering and Computer Science, the student's bibliography must be awarded a minimum of 2 points, based on their scientific research activities.

5―During the third year of study, students must report on their research work at twice, and during the fourth year once a year. This totals in 45 credits. Additional 75 credits must be awarded for a successful presentation and defence of doctoral dissertation. According to the “Regulation of Habilitation Procedure for University Teachers, Scientific Workers and Co-workers” valid at the Faculty of Electrical Engineering and Computer Science, the student's bibliography must be awarded a minimum of 5 points, based on their scientific research activities. At least 1 point must be awarded for publishing research findings in the journals cited in the INSPEC database.

Masters degree studies are research oriented and include introduction to research, the development of students’ capacity for research work in individual scientific fields and disciplines, and the study of subjects providing in-depth and broad knowledge of subjects needed for the preparation of a masters thesis.

Throughout the program of study, students can use laboratories and the computer infrastructure of the Faculty of Electrical Engineering and Computer Science as well as other engineering faculties at the university. Studies leading to masters degrees grant the graduates a professional title of a Master of Science in Electrical Engineering or a Master of Science in Computer Science.

PhD research is carried out in research laboratories; a more detailed description of these programs is given in the continuation of this report. Research teams consisting of doctoral students and graduate students for individual areas of research are commonly formed. Some research teams include participants from several laboratories. International contacts developed through the teams are especially important for doctoral students, because this is the only way for them to take part in the international transfer of knowledge and exchange research achievements. Some of our doctoral students carry out part of their research abroad and even have co-mentors in other countries.

We believe that creativity, openness, peer support, and reciprocity are the bedrock of any academic co-operation. Therefore the Faculty of Electrical Engineering and Computer Science regularly hosts foreign undergraduate, graduate, and postdoctoral students. Our new organisation


of doctoral studies also leads to a greater compatibility with other universities making it easier for student exchange and mobility.


STUDENT RESEARCH GRANTS

In 2002, the Faculty of Electrical Engineering and Computer Science continued to fund individual student research projects. According to internal regulations, undergraduate and postgraduate students can submit their proposals for innovative projects which cannot be financially supported within other established funding schemes. Only non-labour costs are eligible and the supported projects must be finished within 10 months.

After the call in May 2002, six proposals were submitted, and two of them passed the review process and were given the requested financial support. The following projects will have to be completed by May 2003: • Katja Prnaver, Boštjan Grašič, VBC–Virtual Bouyancy Control • Sebastijan Vačun, A Robot with Automated Evasion from Obstacles in Home Environment

Using Soner-Sensor Model and Bayesian Probability Model

It is to be emphasised that Dejan Skrivalnik, a graduate student of the Power Electrical Engineering major studies, was awarded, at the occasion of the Faculty Annual Celebration in November 2002, The Best Student Project Award for his project entitled Solar V-Concentrator for Increasing the Output Power of Solar Modules. The project was supervised by Assoc. Prof. Dr. Jože Voršič and successfully completed in 2002.


GRADUATES OF THE FACULTY OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE

In 2002, the undergraduate students of the Faculty of Electrical Engineering and Computer Science could still complete their studies according to the old system at the junior college level. At the same time, two different types of graduate studies are available: those leading to university degrees and studies leading to professional higher education degrees. The number of 2002 graduates is given in the table below.

2002 Graduates

Option Junior college Level

Professional higher education

degree

Undergraduate university degrees

Electrical Engineering 39 75 29

Computer and Information Science 17 8 20

Electrical Engineering with Economics - - 18


MASTERS AND PhD DEGREES

13 masters degree students successfully defended their masters theses and 10 PhD students their dissertations.

2002 Masters theses

Author Date of defence

Title

COBISS number Mentor Co-mentor

Andrej BREGAR Dec. 10, 2002

Interaktivna podpora skupinski odločitveni analizi na temelju koncepta psevdokriterija (Interactive aid for group decision analysis based on the pseudo-criterion concept)

Dr. József Györkös

Matej GOMBOŠI Oct. 3, 2002

Algoritmi nad množicami mnogokotnikov v E2 (Algorithms on sets of polygons in E2)

7500822 Dr. Borut Žalik Dr. Nikola Guid Andrej HANŽIČ Dec. 27, 2002

Energetski prihranki z uporabo fotonapetostnih sistemov (Energy savings possibility with usages of photovoltaic systems)

Dr. Jože Voršič Dr. Miro Milanović Darko KORITNIK Nov. 29, 2002

Določitev geoelektričnih lastnosti zemlje (Soil resistance measurement)

Dr. Jože Voršič Dr. Jože Pihler Tomaž KRALJ Dec. 10, 2002

Primerjava metod merjenja obsega funkcionalnosti (Function point methods comparison)

7667478 Dr. Ivan Rozman Dr. Marjan Heričko



Title


Petar LJUŠEV Sept. 10, 2002

Analiza vodenja asinhronskega stroja z upoštevanjem magnetne nelinearnosti (Analysis and control of induction machine considering magnetic nonlinearities)

7361558 Dr. Drago Dolinar Dr. Gorazd Štumberger

Jernej RIBIČ Aug. 20, 2002

Numerični izračun asinhronskega motorja z direktnim izračunom toka v rotorju (Numerical calculation of the induction motor by direct determination of the current)

7356950 Dr. Anton Hamler Dr. Božidar Hribernik

Boris RUŽIČ Nov. 29, 2002

Ocenjevanje tveganj – model izračuna neželenih dogodkov (Risk assessment–Model for treatment uncertainty events)

7815958 Dr. Jože Voršič Dr. Jože Pihler

Uroš SAJKO Sept. 27, 2002

Upravljanje konfiguracije kot podlaga za izboljšanje programskega procesa (Configuration management as a basis for software process improvement)

7638294 Dr. Romana Vajde Horvat Dr. József Györkös

Irvin SIROTIĆ Jan. 3, 2002

Sistem za precizijsko balansiranje in kontrolirano debalansiranje optičnih vlakenskih interferometrov (System for precise balancing and controlled unbalancing of fiber optic interferometers)

6862614 Dr. Denis Đonlagić Dr. Boris Tovornik



Title


Kordija STIGLIC Nov. 5, 2002

Model ocenjevanja in zagotavljanja kakovosti integriranega informacijskega sistema (Assessment and quality assurance model of an integrated information system)

7666966 Dr. Ivan Rozman Dr. József Györkös Miro ŽUNEC Jan. 18, 2002

Modeliranje segrevanja vodnikov in OPGW kablov pri nadzemnih vodih (Modelling of the overhead bare conductors and OPGW cables heating)

6884374 Dr. Igor Tičar

Gorazd ŽIBERNA April 3, 2002

Računalniška tvorba 3D zvoka v virtualnih prostorih (Computer synthesis of 3D sound in virtual spaces)

7018262 Dr. Damjan Zazula Dr. Nikola Pavešić


2002 PhD theses


Title


Aleš ČASAR May 20, 2002

Odkrivanje zatičnih napak s simboličnim preverjanjem modelov (Discovering stuck-at faults with symbolic model checking)

7273750 Dr. Zmago Brezočnik Dr. Bogomir Horvat

Dušan GLEICH Aug. 29, 2002

Kontekstno komprimiranje slik (Context-based image coding)

120350720 Dr. Žarko Čučej

Robert LESKOVAR Nov. 5, 2002

Izpeljava hierarhične strukture konceptov iz nestrukturiranih tekstovnih dokumentov (Deriving hierarchical structures of concepts from unstructured text documents)

Dr. József Györkös Dr. Gorazd Lešnjak

Jože MOHORKO Mar. 15, 2002

Avtomatizirano nastavljanje geometrijskih parametrov slikovnih zaslonov (Automatic adjustment of picture screen geometry parameters)

6971670 Dr. Žarko Čučej

David PODGORELEC Nov. 25, 2002

Odprt sistem za načrtovanje z geometrijskimi omejitvami (An open system for constraint-based geometric design)

121766656 Dr. Borut Žalik Dr. Nikola Guid



Title


Boštjan POLAJŽER Oct. 28, 2002

Načrtovanje in analiza eksperimentalnega sistema aktivnih magnetnih ležajev (Design and analysis of an active magnetic bearing experimental system)

Dr. Drago Dolinar

Andreja ROJKO Jan. 3, 2002

Položajno vodenje nelinearnih mehanizmov z uporabo mehke logike (Position control of nonlinear mechanisms based on fuzzy-logic)

6854678 Dr. Karel Jezernik

Janez ŠETINA Dec. 4, 2002

Precizijsko merjenje nizkih tlakov z merilnikom z lebdečo kroglico

(High precision measurements of low pressure with the spinning rotor gauge)

121522432 Dr. Dali Đonlagić

Matej ŠPROGAR Mar. 6, 2002

Avtonomne evolucijske metode in klasifikacijski modeli (Autonomous evalutionary methods and classification on models)

6972438 Dr. Peter Kokol Andrej TIBAUT June 19, 2002

Agenti za reševanje disharmonije v strukturno in semantično heterogenih sistemih (Agents for resolving disharmony in structurally and semantically heterogeneous systems)

7303958 Dr. Ivan Rozman Dr. Danijel Rebolj


RESEARCH BY INSTITUTES AND LABORATORIES

The Faculty of Electrical Engineering and Computer Science is registered with the Ministry of Science and Technology as a research organisation incorporating 14 research units.

1. Computer Architecture and Languages Laboratory

Research unit head: Prof. Dr. Viljem Žumer

The research unit consists of the Computer Architecture and Languages Laboratory and the Heterogeneous Computer Systems Laboratory staff.

2. Institute of Electronics

Research unit head: Prof. Dr. Bogomir Horvat

The research unit consists of the staff of the Digital and Information Systems Laboratory, Electronic Systems Laboratory, Microcomputer Systems Laboratory, and Digital Signal Processing Laboratory.

3. Institute of Automation

Research unit head: Prof. Dr. Karel Jezernik

The research unit consists of the staff of the Systems and Control Laboratory, Signal Processing and Remote Control Laboratory, Process Automation Laboratory, Measurements Laboratory, and Electro-Optical and Sensory Systems Laboratory.

4. Institute of Robotics

Research unit head: Prof. Dr. Karel Jezernik

The research unit consists of the staff of the Power Electronics Laboratory, Industrial Robotics Laboratory, and Kinematics and Simulation Laboratory.

5. Applied Electromagnetics

Research unit head: Assoc. Prof. Dr. Mladen Trlep

The research unit consists of the staff of the Applied Electromagnetics Laboratory and Fundamentals and Theory of Electrotechnics Laboratory.

6. Electrical Machines Laboratory

Research unit head: Prof. Dr. Ivan Zagradišnik

The research unit consists of the Electrical Machines Laboratory staff.


7. Electromechanical Systems Control Laboratory

Research unit head: Prof. Dr. Drago Dolinar

The research unit consists of the Electromechanical Systems Control Laboratory staff.

8. Computer Graphics and Artificial Intelligence Laboratory

Research unit head: Prof. Dr. Nikola Guid

The research unit consists of the Computer Graphics and Artificial Intelligence Laboratory staff.

9. Institute of Information Science

Research unit head: Prof. Dr. Ivan Rozman

The research unit consists of the staff of the Information Systems Laboratory, Database Technologies Laboratory, Computer Mediated Communication Laboratory, and Real-Time Systems Laboratory.

10. Systems Software Laboratory

Research unit head: Prof. Dr. Damjan Zazula

The research unit consists of the System Software Laboratory staff.

11. Power Engineering Laboratory

Research unit head: Assoc. Prof. Dr. Jože Voršič

The research unit consists of the Power Engineering Laboratory staff.

12. Institute of Mathematics and Physics

Research unit head: Prof. Dr. Vitodrag Kumperščak

The research unit consists of the Applied Mathematics Laboratory staff.

13. System Design Laboratory

Research unit head: Prof. Dr. Peter Kokol

The research unit consists of the System Design Laboratory staff.

14. Geometric Modelling and Multimedia Algorithms Laboratory

Research unit head: Assoc. Prof. Dr. Borut Žalik

The research unit consists of the Geometric Modelling and Multimedia Algorithms Laboratory staff.


PROGRAMME UNITS

Since 1998, the Faculty of Electrical Engineering and Computer Science has been registered with the Ministry of Education, Science, and Sport as a research organisation incorporating 9 programme units. Since 2000, financial support is given to the units according to the obtained results, which must be presented in annual reviews of their scientific contributions and technical and expert contents. In 2002, seven programme units were given a full financial support, whereas two units had only partial financing. Short overviews for 2002 are gathered in the sequel.

1. Information Systems

Programme unit head: Prof. Dr. Ivan Rozman

This programme unit consists of the staff of the Real-Time Systems Laboratory, Database Technologies Laboratory and Information Systems Laboratory.

Scientific disciplines: Artificial Intelligence, Computer Science, Computer Technology, Control, Informatics, Numerical Analysis, Operations Research, Programming, Statistics, Systems, Systems Engineering, Systems Theory.

The importance of technologies that enable the exchange, processing and storing of data in arbitrary form is increasing with the complexity of information systems, the development of information society, and Internet computing. Multimedia information systems that enable easy information exchange and are often tightly connected to real-time systems are also becoming increasingly important. Our goal is the development of methodology for formal definition and the continuous improvement of software development processes. Experiences in cooperation with partners led us to a developed methodology, which – together with knowledge in the development of quality systems – provides for an integrated environment for software development. Research in the area of quality and process modelling headed towards the upgrade of previously developed SoPCoM methodology – Software Complexity Model. This model was tested in practical projects. Additionally, a tool was developed for methodology support, process modelling and complexity assessment. Our experiences in the process modelling of a software development process are the basis for a model introducing a quality management system in an information society. In this model, the description of tasks is compatible with the SoPCoM model that can be used to assess the complexity of the tasks. Process modelling is also included in the 5th framework project TEAMWORK. The basic goals of this project are twofold: firstly, the testing of the NQA method for process modelling and secondly, the testing and upgrading of software for document flow within a process. In the area of software development, we paid special attention to the definition of an object-oriented process for software development, considering conventional and agile processes and process tools. Fundamental research from this area was used in the assessment of technologies for the component-based development of modern information solutions by using UML, web services, distributed objects CORBA, .NET, J2EE, object-relational databases and object request brokers. We have defined a model for the evaluation and optimization of distributed


component architecture efficiency. We investigated the possibility of ensuring successful usage of object technology and component-based development in the area of modern Internet applications, usage of component-based models for the integration of new and legacy systems and the introduction of successful reused mechanisms. We have built multitier component model integrated architecture for application integration and defined a catalogue of integration patterns. The main characteristic of the integral support environment tool for the software development process is its roots in research work; it offers clear, unambiguous presentation of the software development process and is a basis for simple and successful process improvement. The tool offers complexity calculation for each task, transitions and of the whole process model. We continued with research in the real-time systems development area according to their increasing importance. We set a formal framework: with our two projects, an applicative and a fundamental one, integral development of embedded control system and reliability of the embedded control systems. We will join the methods within this framework, so that the development of an embedded control system is integral, in both software and hardware parts, with the final goal: more reliable, safer and easier to maintain systems. We cover the area of holistic approach to the development and verification of software architecture and hardware and fault-resistance. We continued with research into the development of optimal data warehousing architectures and pointed out the most common mistakes in building the data warehouse in practice. We conducted research in the area of knowledge discovery in databases and efficiency of classification algorithms. We also paid special attention to data security and data quality. We investigated the possibility of data models reuse in the area of intelligent medical systems. In the frame of European Leonardo da Vinci pilot project Valeurtech we have looking for common reference system for engineering skills on which the information system and database will be developed. The last of the more important areas of our research work includes research in the area of intelligent systems. In this area we developed a method of rule extraction from fuzzy neural networks. The connection of artificial neural networks with fuzzy logic enables the construction of learning algorithms that are superior over classic neural networks, because the discovered knowledge can be given in the form of simple rules that are common in expert systems with knowledge bases. In many practical applications, the problem is in small amounts of training cases due to several reasons. In this case it is hard to find an optimal structure of neural networks because classical statistic rules do not apply. We used a principle of structural minimization with assessment of VC dimension. The principle is based on empirical risk minimization. The true error is assessed by using the combined test error and the assessed generalization error with the help of VC dimension. The testing of the new software has shown its wide applicability: in information technology, medicine, pharmacy – in areas that are successful in Slovenia and export-oriented.

2. Power Engineering

Programme unit head: Assoc. Prof. Dr. Jože Pihler

This programme unit consists of the staff of the Power Engineering Laboratory.


Scientific disciplines: Electrical Engineering, Electromagnetism, Energy Research, Optics.

In 2002, the Power Engineering programme group's financing decreased significantly. Nevertheless, all the research activities were carried on from the last year and many additional were started. The group was still focused on the monitoring and observation of perturbances in the power system caused by large Slovenian electricity consumers, while applied projects within the framework of the Environmental Protection Programme for the City of Maribor entered the next phase. We researched on the implementation of the Kyoto Protocol, laboratory for high current tests and energy balance in the Municipality of Maribor. Projects for industrial clients were the development of a new motor starter, low voltage distribution panels for outdoor use, and cable accessories and heat shrinkable tubing. International projects included a virtual electromagnetic laboratory and Web-based distance learning, CO2 emissions (The Joint Project - National CO2 Emission Baselines and Additional Project – 5th framework project) and development of protection systems against life-threatening step and touch voltage occurring during an earth fault in the high voltage network of a coal mine, together with a proposal for efficient selective protection. The programme group participated in organisation, as in previous years, of the international experts' meetings “Power Engineering” and “Lighting 2002”. The members of the programme group also actively participated at international conferences and published their papers in Slovenian and international journals. The programme group achieved and even exceeded all the planned objectives in all areas of the programme group's work, i.e. power system analysis, electric power quality, energy supply, lighting and power facilities.

3. Methods in Communications

Programme unit head: Assoc. Prof. Dr. Zdravko Kačič

This programme unit consists of the staff of the Digital and Information Systems Laboratory, Electronic Systems Laboratory, Microcomputer Systems Laboratory and Digital Signal Processing Laboratory.

Scientific disciplines: Signal Processing, Telecommunication Engineering.

In the year 2002 an analysis of the usage of higher-order cumulant properties in noise robust speech parameterization has been performed. The test on the German subset of Aurora 3 database showed performance improvement with higher-order linear predictive cepstral coefficients (LPCC) against the generally used second-order LPCC extraction procedure. Another improvement has been achieved with the usage of Burg’s algorithm in the LPCC estimation procedure or with the application of the Maximum Entropy (MEM) power spectrum estimation method in the mel-frequency cepstral-coefficient (MFCC) feature extraction procedure. Another contribution was the analysis of methods for convolutive distortion reduction. The previously developed MFCC feature extraction algorithm has been further upgraded with well-known RASTA processing, which was in our case integrated into the logarithmic mel-filterbank domain. Important speech recognition performance improvement has been achieved. We also tried experimenting with a three-pass recognition strategy. We used three different speech recognizers (ISIP, Julius,


HTK) for hypothesis generation. Morphological bigram language models were used at the first pass. In the case of inflectional languages, they proved to be more successful than word-based language models. At the second pass, hypothesis network was restricted with trigram morphological language models. For the third pass we used the ROVER algorithm. The purpose of this algorithm is to reduce recognition error by exploiting any differences between recognizers. We used different voting methods for comparison. We also developed a new method, which uses a linear combination of frequency voting and language model information to find the best (most suitable) hypothesis. Three-pass strategy in comparison to two-pass strategy resulted in a 3 % higher recognition accuracy. In the area of multilingual speech recognition research into the transfer of source multilingual acoustic models to a new language was investigated. The influence of language and language group similarities was investigated with the inclusion of the Italian language. The impact of acoustic adaptation on crosslingual speech recognition was also researched. The performance of acoustic models built from a combination of fixed and mobile telephone speech database was analyzed. A method for specification of asynchronous sequential circuits using a simple process algebra was developed. An approach to verification of asynchronous circuit logical correctness with emphasis on hazard detection by performing model checking with our home-made software package EST was derived. The appropriateness of Actions Temporal Logic for the modular specification of systems which contain dynamically created components and are based on an input/output automata-like model was demonstrated. A study of software code verification methods using model checking was carried out. This study was focused on automatic verification of SDL code using SPIN tool. Research was performed in the field of reduced complexity algorithms for adaptive multi-user detection in spread spectrum communication systems with emphasis on the use of genetic algorithms.

4. Electromechanical Systems Control

Programme unit head: Prof. Dr. Drago Dolinar

This programme unit consists of the staff of the Electromechanical Systems Control Laboratory.

Scientific disciplines: Automation, Electrical Engineering, Electromagnetism, Mathematical and General Theoretical Physics, Robotics.

This research programme is composed of two topics. The research objective of the first topic is the development of new dynamic models of electromechanical devices, development of new methods for parameter determination and design of new systems for the control of electromechanical devices. The first subject under investigation was the modelling and control design of high performance drive with Linear Synchronous Reluctance Machine (RSLM). A nonlinear dynamic model of the LSRM was developed, verified and validated. The model contains a magnetically nonlinear and anisotropic model of the LSRM iron core, and the position and current dependent characteristics of the thrust and friction force. All required characteristics have been determined experimentally.


Furthermore the control of a permanent synchronous machine working in the field weakening region was designed and a method was proposed for higher harmonics compensation. The developed solutions were dynamic, therefore the perfect tracking of the reference position trajectory is assured even in the field weakening region. In the framework of the applied research programme the experimental system of active magnetic bearings (AMB) was developed. The design of AMB was achieved in cooperation with the KU Leuven, ESAT/ELEN, Professor K. Hameyer, whilst the design of the rotor (system) shaft was achieved in cooperation with the KU Leuven, MECH/PMA, Professor W. Heylen. The development of the power supply, electronics and the control is based on our knowledge and experiences. Magnetic bearing force was measured in order to determine the mathematical model by continuous analytical functions. A control design was implemented based on the derived mathematical model. An improvement in the static and dynamic system performances was created. We have created the design as well as manufacturing the AMB experimental system. The modular type of realization and the user friendly control desk make it possible to use the system in applied and theoretical research as well as for educational purposes. The research objective of the second topic is dynamic power system modelling, control and unit protection. We claim that network modelling can be performed equally based on instantaneous state variables or by using dynamic phasor quantities. Analysis tools for the interaction of power system transients with protection operation have been developed. During the testing phase the new protection algorithms were based on the analytical signal processing methods applied to the power transformers and transmission lines. The transformer turn-to-turn faults are the focus of our current research. This fault type represents a great challenge for existing relays since they are unable to recognize turn-to-turn faults in the early development stage. We hope first to develop an appropriate model describing this fault type with sufficient accuracy based on the great number of measured samples on the laboratory power transformer. The deeper knowledge obtained will be later used to improve the sensitivity of the protection algorithms.

5. Automation

Programme unit head: Assoc. Prof. Dr. Boris Tovornik

This programme unit consists of the staff of the Process Automation Laboratory and Laboratory for Electro-Optics and Sensor Systems.

Scientific disciplines: Automation, Instrumentation Technology, Robotics.

New fuzzy control methods for swinging up and balancing the inverted pendulum have been developed. Algorithms are based on exact mathematical model, and identification of the inverted pendulum parameters. The velocity based system linearization method was used for fault diagnosis of a water vessel from a heat exchanger. OPC based communication between Matlab environment and laboratory process was developed with the intention of performing real-time experiments


The model of intelligent house has been extended with the iLON modul. One-way web communication based on Lon Talk protocol and an additional input/output module has been realized. Future work will consider two-way web communication. In 2002 we continued our work in the field of low coherence interferometry, sensors for road traffic monitoring and we initiated intensive work in the field of biomedical optical sensors. A system for precise balancing and unbalancing of fiber optics interferometers was usefully completed and tested. The system can balance arbitrary fiber optic interferometer to the optical path length difference of less than 5 µm, regardless of the length of interferometers arms. This developed system enables technology for a whole new range of measurement and sensor devices. We have also usefully concluded preliminary tests on optical fiber road vehicle axle detectors. The preliminary testing was carried out at a live freeway location near Hoče. The results clearly demonstrated the practical potential of this system and its robustness and easy installation. These preliminary results are the base's for our continuous development efforts. In 2003/04 we plan to build a practical system in cooperation with Mikrobit, d. o. o. In the field of bio-medical sensors we demonstrated the first blood pressure sensors with diameter of less than 125 µm. This manufacturing procedure is based on surface micromachining, achieved by etching the fiber in HF acid and coating the etched opening with an appropriate polymer membrane. In 2003/04 we plan to continue this research in terms of further improvement of membrane quality, and processing of the optical signals obtained from the sensor.

6. Computer Systems, Methodologies and Cybernetics

Programme unit head: Prof. Dr. Viljem Žumer

This programme unit consists of the staff of the System Software Laboratory, System Design Laboratory, Computer Graphics and Artificial Intelligence Laboratory, Computer Architecture and Languages Laboratory, Heterogeneous Computer Systems Laboratory, and Geometric Modelling and Multimedia Algorithms Laboratory.

Scientific disciplines: Artificial Intelligence, Bioinformatics, Biomathematics, Computer Science, Computer-Assisted Education, Image Processing, Medical Informatics, Signal Processing, System Information Theory, Systems Engineering, Systems Engineering and Computer Technology.

The National programme group Computer Systems, Methodologies and Cybernetics combine their research potential in the whole Institute of Computer Science. In the year 2002, our research work was devoted to the following research areas: semantics and implementation of programming languages, study of natural phenomena, algorithms for surface flattening, development and implementation of algorithms of computational geometry, researching the decomposition of bioelectrical signals, analysing ultrasound images, building virtual computer environments for learning and training, methods for design of intelligent systems, and heterogeneous processing and web technology. The automatic generation of language-based tools (compilers/interpreters, editors, debuggers, etc.) was explored in the field of programming languages. We were able to automatically generate a program visualizer and a program animator from formal specifications of LISA compiler


generator working together with Portuguese partner. Furthermore, we worked on methodologies for the development of domain-specific languages, where domain-specific language design and implementation patterns were explored. Special emphasize was put to the interaction pattern where system functionality is described with domain-specific language. In the area of aspect-oriented programming, the aspect-oriented language AspectCOOL was developed using LISA compiler generator, which enables a separate compilation of aspect and component codes. In the field of computer graphics and animation, we studied cloud modelling and animation. We focused on techniques for volumetric cloud modelling and rendering. We also studied techniques for realistic presentation of clouds in real-time applications and considered the alternative methods for volumetric rendering, animation and simulation of the volumetric-based clouds. Techniques for effective control of cloud animation and simulation were derived. In this way, we tried to get a realistic sequence of pictures. We introduced the genetic algorithm, which is useful for positioning of implicit spheres or for defining a rough cloud structure. With some modification, the algorithm is valuable also for cloud animation and simulation. Our research was additionally dedicated to solving the problem of surface flattening, where we developed a new method for the reconstruction and flattening of digitalized surfaces. In the area of computational geometry, we designed, developed and implemented computer algorithms for compression of triangular meshes. We also proposed and implemented a new very fast algorithm for Delaunay triangulation, and started work on representation of 4D data. 4D data present dynamics of spatial data applications primarily in observing the medical and geological phenomena. We designed a new incremental algorithm for creation of geometric buffers. In the area of geometric modelling, a new incremental geometric constraint solver was developed. It is open for user definitions of new types of geometric elements and constraints. By incorporation of a numerical technique, it is able to solve many constraint problems that cannot be drawn by employing a ruler and a compass only. In 2002, we continued to work on the decomposition of bioelectric signals. We focused primarily on the approaches which theoretically tend to a thorough decomposition, in spite of possibly large number of sources and superimpositions. Our derivations were devoted to three algorithms: the first one runs in two steps in such a way that it obtains the initial approximate results by the w-slice method and, afterwards, optimise them using a LMS procedure; the second one is based on blind source separation which was significantly improved by a special time-frequency single auto-term search; while the third one deals with inverse correlation matrix in order to calculate the so called separation index which points out the setons of the individual signal contributions. Testing these approaches on synthetic electromyograms (EMG), very good results were obtained. Some successful applications to the real EMGs were also made. Parts of this research were included in the European 5th Framework Programme project called NEW. Our collaboration with the Teaching Hospital of Maribor (SBM) also proceeded. We upgraded the algorithms for computer detection of perifollicular blood vessel network using sequences of ultrasound images. We together have also entered a European 5th Framework Programme project called SimBio, whose aim is to detect, model, and simulate the knee joint obtained from the nuclear resonance imaging. Our activity in the field of virtual education tools for medical training decreased slightly last year. We tried to unify


the theoretical background with the conceptual learning principles and we summed up our findings in three journal papers and a few conference contributions. We developed new methods for design of intelligent systems and expanded application of intelligent systems to new fields in medicine and education. New methods are based on multimethod approaches, evolution algorithms and hybrid methods. We developed methods for generating decision trees with the use of multimethod approach, information induction, parametric independent evolution of decision trees, and MultiVedec platform. A portal which simplifies the creation, integration and management of information contents was developed on the web technologies. Basic features are document management, search facility, integration of internal services with external information systems, cross referencing of data and services, information categorization, independency of data to different user interfaces and electronic media, multi language support, authorization of access to data and services, content and user interface personalization. Our portal is designed on some basic recurring services or "horizontal services". These services are responsible for various tasks, such as user authentification, external services integration, notification, personalization, searching, user interface and billing. We developed our own personalization service, which is based on original algorithms for classification of content and users. We also developed some vertical services, which are used as infrastructure for distance learning portal. This infrastructure will be used for the University of Maribor distance learning portal.

7. Cybernetics

Programme unit head: Assoc. Prof. Dr. Vojko Matko

This programme unit consists of the staff of the Signal Processing and Remote Control Laboratory, Measurements Laboratory and Systems and Control Laboratory.

Scientific disciplines: Artificial Intelligence, Automation, Metrology, Physical Instrumentation, Robotics, System Information Theory, Telecommunication Engineering.

The starting point of the proposed program is the development of a complete spectrum of remote control, measurement, system control and signal processing areas. It is based on the swift technological development resulting in increasing interconnectivity between the systems and cutting-edge technologies, such as the Internet, LAN environment, mobile telephony, pocket PCs, satellite receivers, bluetooth modules, infrared modules, etc. The research programme covers researches and studies of new relations, methods, algorithms, procedures in remote controlling, measurements, system controlling, signal processing and communication carried out by three laboratories (Measurements Laboratory, Systems and Control Laboratory, and Signal Processing and Remote Control Laboratory). This inter-disciplinary program envisages modern methods of planning intelligent measurement and regulation systems based on advanced communication technologies and software tools for signal acquisition, monitoring, control and processing. The research carried out by the Measurements Laboratory is focused primarily on the following basic research areas: computer-based measuring, signal acquisition, new measurement methods


development, measurement data acquisition, transmission and processing in real time, application of new network-based instrumentation bus ("bluetooth"), virtual instrumentation (Internet instruments, pocket PC as an instrument), measurement uncertainty modelling in measuring circuits, resonant measurement methods research, measurement of properties of materials accumulating electrical charge, measurement of electrical properties of conductors, development of data measurement and processing using a video camera, advanced home instrumentation development, disturbance attenuation in measuring circuits, development of energy saving measuring methods, and measurement development and testing in modern company. Basic research is directed towards the use of resonant measuring methods and quartz crystals (measurement of relative dielectricity and very small changes of inductivity and capacitance, and indirectly of non-electric quantities) and the application of differentiated satellite signals in measuring technique. Modern company management is based on man-machine symbiosis, which enables creativity and flexibility in launching new products, technological improvement, measuring signal monitoring, measurement, control and processing as well as employee distance education, etc. This is the reason why the Laboratory is also active in the research of special measurements based on Java computer program language and video cameras in modern companies. To meet the needs of the industry, the Laboratory specialises in the modelling measuring uncertainty and development of EMI filters designed to reduce the disturbances caused by digital switching circuits. The Laboratory also works on the development of new Internet-based measurement procedures in future modern home. The research work of the Control and Systems Laboratory specialises in the field of control and regulation systems in the theoretical and practical research of classical and modern control complex system methods and procedures carried out via GSM, LAN and the Internet. In particular, the research work is concerned with adaptive, predictive and robust systems. Recently, the Laboratory has been active in the research of predictive regulation systems based on robust models and robust synthesis method in H2 and H∞. The Laboratory also works on intelligent systems theory, in particular on the neuron network systems. In the field of multimedia, the Laboratory is engaged in the research of user-friendly software applications, man-computer communication and in the development of distance learning, which includes the designing of the contents and study techniques as well as data transfer technologies. Signal Processing and Remote Control Laboratory is active in the scientific fields of theory of signals, information and telecommunications. Recent research work has been directed towards basic research work on intelligent algorithms of 3D image context-based compression and processing, towards ATM network control, planning and development of new algorithms in cable communication and GSM networks, controlling radiator radiation using computer vision, setting image parameters on cathode screens using polynomial methods of edge modelling in pattern recognition and hybrid optimisation algorithm, and towards hybrid regulation algorithm which enables implementation of new control strategies replacing the classic pulse-width modulations in controlling power switch controllers.

8. Applied Electromagnetics

Programme unit head: Assoc. Prof. Dr. Mladen Trlep


This programme unit consists of the staff of the Electrical Machines Laboratory, Theoretical Electrotechnics Laboratory and Applied Electromagnetics Laboratory.

Scientific disciplines: Electrical Engineering, Electromagnetism.

Within the framework of the research programme “Applied Electromagnetics”, parallel work is carried out in three fields, with the ultimate aim of incorporating all the knowledge into a complex system which will, as accurately as possible, cover all the demands of a real electromagnetic problem. The three fields are: – research and development of mathematical models for defining magnetic, electrical, current and

temperature field under stationary and dynamic conditions, – development of measurement methods for defining the real characteristics of material, – development of models to be used for solving inverse problems in electrotechnics. The first part focuses on numerical methods for electromagnetic field calculation, namely the finite element and boundary element methods. The development and application of the above methods are directed to CAD program solutions on concrete objects. In most cases, these objects are electromechanical converters, actuators, switches, insulating and grounding systems, etc. The development of measurement methods focuses on measurement methods for accurately defining the real characteristics of materials and losses in them, which is necessary for a more realistic mathematical model of the electromagnetic system. This work is carried out using methods for defining magnetization and hysteresis curves, on the determination of pulsating and rotational losses in magnetic materials and on the production of measurement yokes for different shapes (square and circular) of measurement specimen. Software for supporting these measurement methods is being developed. The aim of the calculation is to find out the area in the specimen, where the magnetic field is homogeneous enough to measure the material characteristics. The problem is calculated as a three dimensional non-linear transient problem. The influence of the z component of magnetic density and the influence of the eddy currents on field homogeneity in the specimen is analysed. The comparison between measured and calculated values of magnetic field confirms the regularity of the calculations. We decided on a special variation of the boundary element method, the so-called DRM method, for solving the inverse problem, which enables simpler operations in the domain, where we want to determine the inverse problem. Our initial work has been directed to problems of 2D static fields, where we detect any unknown distribution of electromagnetic field sources, or rather, unknown material property. Both problems are very prevalent in bioelectromedicine, for searching defects in material structure, for development of measurement methods, etc.

9. Institute of Robotics

Programme unit head: Prof. Dr. Karel Jezernik

This programme unit consists of the staff of the Power Electronics Laboratory, Industrial Robotics Laboratory and Kinematics And Simulation Laboratory.

Scientific disciplines: Automation, Motors and Propulsion Systems, Robotics.


In 2002, the main event regarding the international activities of our research group was the organization and performance of the International IEEE conference on Advanced Motion Control. This conference was held at the Hotel Habakuk in the city of Maribor, Slovenia. We hosted more then 100 participants with many high profile invited lectures from leading world experts in the field of robust controlling of industrial and medical robots. Application of new theoretical results in the fields of automation and robotics are being designed with dedicated systems and appliances used in interface, monitoring, communications, and control. Such control applications increasingly require advanced capabilities like high resolution and user-friendly graphical user interface (GUI), TCP/IP connectivity, and diverse memory units (flash memory, disk-on-chip, hard disk, CD-ROM, etc.). Thus, our research program opened a new field: system control performed by PC technology and DSP controllers on the basis of hard real-time operating system QNX and open source Linux operating system. Microsoft software still dominates in the market, however, open and royalty-free software like Linux is becoming more and more competitive. Linux under GPL supports free access to the source code which can be changed by developers. The Institute of Robotics collaborated with ULTRA, d. o. o. in the early development stage of the new BIRD-2 control station for use in the petroleum industry. This communication is supported by TCP/IP protocol and GSM system. BIRD-2 is designed on Linux platform. Thus, control station competitiveness was significantly increased with the use of royalty-free software. Institute research also addresses the field of factory automation within the scope of open machine control system such as PC based CNC controller. The CNC controller is built on the basis of QNX, which is a hard-real time operating system. Ethernet TCP/IP connects distributed control units with the central control system. The controller is also linked to the factory LAN, thus making a solid base for total factory automation within CAM. Benefits include faster design cycles, lower downtime using diagnostics and simulation tools, increased productivity and decreased maintenance costs.


OVERVIEW OF PROJECTS AND STAFF BY RESEARCH UNITS

Number of staff members Number of projects

RU RS TE TS JR Total AP BP RD Int. Other Total

1. 2 9 3 1 15 8 1 3 12 2. 4 18 8 6 36 3 2 4 8 17 3. 1 14 6 3 24 9 3 8 7 4 31 4. 3 13 4 2 22 2 1 1 4 5. 4 1 2 7 1 6 7 6. 2 2 2 6 1 2 3 7. 1 4 1 2 8 1 1 2 2 6 8. 3 1 1 5 1 1 2 9. 3 20 11 3 37 2 1 2 3 11 19

10. 1 7 2 1 11 2 4 6 11. 2 7 3 12 1 6 3 1 6 17 12. 10 10 3 3 13. 2 2 2 6 1 11 1 13 14. 3 3 6 1 2 3

Total 21 116 39 29 205 28 19 23 41 32 143

RU – research unit AP – applied projects

RS – researchers BP – basic-research projects

TE – teaching staff RD – research and development tasks

TS – technical staff Int. – international projects

JR – junior researchers Other – projects of the industry and the Municipality of Maribor

Institute of Automation AU – 1

INSTITUTE OF AUTOMATION

Head:

Prof. Dr. Karel Jezernik

Phone: +386 2 220 73 00

E-mail: [email protected]

URL: http://www.au.feri.uni-mb.si/index.html-l2

The Institute of Automation participates in basic and applied research in the fields of electrical and high precision measurement of electrical and non electrical quantities, measurement automation, signal processing, and remote control, sensor systems, systems theory and control, modelling, identification, computer control of processes, system design in automation, software in automation, expert system in automation, fuzzy control systems, man-machine communication, electro-optics systems, programmable logic control systems, and real time control systems.

The Institute of Automation co-operates with many institutes abroad: Technische Universität Graz - Austria, Technische Universität Wien - Austria, Politehnikais Instituts Latvijas, Riga - Latvia, Fachhochschule München, Technische Univerersität München - Germany, Deutsche Forschungsanstalt für Luft- und Raumfahrt Oberpfaffenhofen - Germany, Ecole Polytechnique Féminine, Sceaux, Paris - France, Guangxi University of China, Nanning - China, Elektrotehnički fakultet, Zagreb - Croatia, Tehniška univerza, Bratislava - Slovak Republic, University of Sarajevo - Bosnia and Herzegovina, Faculty of Electrical Engineering in Pragua and Brno - Czech Republic.

The members of the Institute of Automation belong to five laboratories, which also includes one centre of technology.

AU – 2 Institute of Automation

Systems and Control Laboratory

Head: Assoc. Prof. Dr. Rajko Svečko

Signal Processing and Remote Control

Laboratory Head:

Prof. Dr. Žarko Čučej

Process Automation Laboratory

Head: Assoc. Prof. Dr. Boris Tovornik

Measurements Laboratory Acting Head:

Assoc. Prof. Dr. Vojko Matko

Electro-Optics and Sensor

Systems Laboratoy Head:

Asst. Prof. Dr. Denis Đonlagić

Institute of Automation Head:


Institute of Automation AU – 3

Systems and Control Laboratory

Head: Assoc. Prof. Dr. Rajko Svečko

Employees: Asst. Prof. Dr. Matjaž Debevc; Dr. Amor Chowdhury; Boris Ratej, MSc; Josip Vrbanec, MSc; Andrej Knuplež, Ing.

Signal Processing and Remote Control Laboratory

Head: Prof. Dr. Žarko Čučej

Employees: Asst. Prof. Dr. Peter Planinšič; Dr. Jože Mohorko; Dr. Dušan Gleich; Mihael Kaiser, BSc; Martin Pec, BSc; Tomaž Romih, BSc

Process Automation Laboratory

Head: Assoc. Prof. Dr. Boris Tovornik

Employees: Asst. Prof. Dr. Nenad Muškinja; Asst. Prof. Dr. Marjan Golob; Stojan Peršin, BSc; Alojz Hojnik, Ing.

Part-time employed: Aleksander Polutnik, MSc

Measurements Laboratory

Acting Head: Assoc. Prof. Dr. Vojko Matko

Employees: Dr. Bojan Gergič; Ladislav Mikola, MSc; Stanislav Lampič, Ing.; Miloš Vute, Ing.

Electro-Optics and Sensor Systems Laboratory

Head: Asst. Prof. Dr. Denis Đonlagić

Employees: Edvard Cibula, BSc

AU - 4 Systems and Control Laboratory

SYSTEMS AND CONTROL LABORATORY

Head:

Assoc. Prof. Dr. Rajko Svečko

Phone: +386 2 220 71 40


RESEARCH PROJECTS

Current research projects

Basic research project

Modern Control Theory

Leader: Assoc. Prof. Dr. Rajko Svečko Participants: Dr. Amor Chowdhury; Josip Vrbanec, MSc; Martin Pec; Dalibor Igrec

Financed by: Systems and Control Laboratory; Ministry of Education, Science and Sport of the Republic of Slovenia

Applied projects

HIPULAB Hipermedijska učilnica in laboratorij (Hypermedia classroom and laboratory)

Leader: Asst. Prof. Dr. Matjaž Debevc

Financed by: Ministry of the Information Society

ŠGID CD-ROM – Študijska gradiva za izobraževanje na daljavo (CD-ROM – Study material for distance learning)



Systems and Control Laboratory AU - 5

Research and development projects

MSMA Mikrokrmilniški sistem za samodejno usmerjanje mikrovalovnih anten (Microcontroller system for self- positioning of microwave antennas)

Leader: Assoc. Prof. Dr. Rajko Svečko Participants: Boris Ratej, Dr. Amor Chowdhury, Andrej Knuplež

Financed by: Faculty of electrical and computer engineering Maribor

Reporting life outside the studio at the scenes of events is daily bread for many radio reporters. The teams for outside studio reporting are usually equipped with special vehicles and adequate technical equipment. When reporting outside the studio takes longer, then from the viewpoint of costs, the most rational telecommunication connection between reporter and radio center is truly their own microwave link. To restore the microwaves link a lot of experience and hard work by the technician is needed, besides this operation is time consuming and often unsafe. Because of this, the idea of automation for this procedure was introduced.

The aim of the project was doing the synthesis and development of adequate hardware and software for automatic microwave link connection between a mobile reporter vehicle and the radio center. The whole device is built from five components (microcontroller system, communication-navigation unit, device driver unit, power supply unit, and user interface). The core of the device is a microcontroller system with a SIMENS SAB 80C535 microcontroller, which provides all the needed intelligence. The communication-navigation unit is composed of a GSM modem with an integrated GPS navigation system and an electronic compass VECTOR 2XG. GPS is the source for the vehicle position data, which is not enough for automatic microwave link establishment. Because of this an electronic compass is added. The GSM modem also has a role in communication backup in case the microwave link is impossible to restore. Another important unit is the user interface, which enables manipulation of the device. The device has three important operation modes, which are self-testing, microwave link and GSM link mode.

In the software design, special care was taken about device reliability. So with the goal of getting a reliable device, algorithms and software for self-testing and error discovering have been developed and implemented. Finally, the functional value of the device has been proven by the laboratory tests (Figures 1 and 2).


Figure 1: System in the developing phase

Figure 2: System testing

CRP-KS-50/02, V5-0638-0589-02

Didaktični vidiki uproabe informacijske in komunikacijske tehnologije – IKT (poučevanje in učenje) (Didactic view of Information and Communication Technologies Use – Teaching and Learning)

Leader: Ivan Gerlič (Faculty of Education) Participant: Asst. Prof. Dr. Matjaž Debevc

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

CRP-KS-193/02, V5-0653-1538-02

Poučevanje in učenje na daljavo (celovita uvedba e-izobraževanja na nacionalni ravni) (Distance Learning and Teaching)

Leader: Janez Bešter (Univerza v Ljubljani) Participant: Asst. Prof. Dr. Matjaž Debevc


CRP-KS-62/02, V5-0639-02 v okviru CRP 2001–2006

Poučevanje in učenje s sodobnimi tehnologijami za osebe s posebnimi potrebami (gluhi in naglušni) (Deaf and Rather Deaf People Teaching and Learning with Modern Technologies)

Leader: Asst. Prof. Dr. Matjaž Debevc Participants: Dr. Amor Chowdhury, Assoc. Prof. Dr. Riko Šafarič Project partners: Faculty of Electrical Engineering and Faculty of Computer and

Information Sciences, Ljubljana



Industrial project

Učeče se podjetje: št. 1010-415-2002

Avdio-video tehnologije za prenos predavanj in orodja za preverjanje znanja za spletno izobraževanje na daljavo s poudarkom na tehničnih vedah (Audio-video technologies for distance education and tools for examination over world wide web with the emphasize on technical sciences)

Leader: Janez Bešter (Univerza v Ljubljani) Participant: Asst. Prof. Dr. Matjaž Debevc Project partners: PIA, d. o. o., ESOTECH, d. d.

Financed by: Ministry of Economics of the Republic of Slovenia

International projects

BITEMA Bilingual Teaching Material for the Deaf by Means of ICT

Leader: Niels Nielsen (Castberggaard) Participants: Bogdan Dugonik, MSc; Asst. Prof. Dr. Matjaž Debevc Project partners: Castberggaard, University of Maribor, Greta Paramedical et Social,

Communication Centre for the Deaf and Hard of Hearing

Financed by: European Union

In 2002 we worked on the enhancement of learning tools and learning methods for deaf adults, who have problems when applying for a better job because of their lower level of knowledge or bad qualifications. Some technical, software, and didactical tools have been developed and integrated to enhance the basic knowledge level of deaf people. Some experimental computer programs have been developed, which could help the tutors of hard of hearing people to integrate the learning materials into the Web. The learning materials should contain Video, 3D-animation, Videochat, web-chat, and other elements.

SLO–BIH 19/2002–2003

New Didactic Methods Distance Learning

Leader: Asst. Prof. Dr. Matjaž Debevc Participants: Assoc. Prof. Dr. Riko Šafarič, Prof. Dr. Karel Jezernik Project partner: Faculty of Electrical Engineering, University of Tuzla



SUPPORT LEONARDO da VINCI project SUPPORT–Training course on sustainable product development

Leader: Jurgen Jantschgi (University of Leoben) Participants: Asst. Prof. Dr. Matjaž Debevc; Bogdan Dugonik, MSc Project partners: Fraunhofer Institute Aachen; Joanneum Research, Graz; AREA

Science Park Consortium


Completed research projects 2002

Applied project

CDED Razvoj študija na daljavo na Univerzi v Mariboru (Distance learning development at University of Maribor)

Leader: Asst. Prof. Dr. Matjaž Debevc Participant: Metka Zorič-Venuti, MSc

Financed by: University of Maribor

Duration: Jan. 1999 to Dec. 2002


VVGNID Virtualna vrata gluhim in naglušnim v informacijsko družbo (Information society virtual gate for deaf and rather deaf people)


Duration: June to Oct. 2002

E-Learning Izdelava e-learning spletne strani za izobraževanje odraslih gluhih na daljavo (E-learning web page design for deaf people distance learning)


Duration: Sept. 2001 to Dec. 2002


Industrial project

CNSTV Centralno nadzorni sistem tehničnega varovanja (Central supervision system)

Leader: Assoc. Prof. Dr. Rajko Svečko


Technical security is build on different technical systems. Each of the systems (fire alarm, burglary alarm) is usually closed, independent and works autonomously. Incompatibility of the technical security appliance and software equipment of the different producers and the autonomous system work concept are the two major problems for the supervision center, where all information about what is happening on the object flows in.The security service can become complicated and non-transparent because of the huge range of installed hardware and software equipment on the object. The main goal of this research project is a study of the different technical security systems and development of software equipment for the informational integration of different technical security systems on the supervision computer. The second part of the project is the development of a software user interface intended for the graphical display of security events on the object.

International project

ACCESS/zz9914-SLO-01

PHARE ACCESS project VISIOCOM: Video Supported Online Communities


Duration: Apr. 2001 to Oct. 2002

PUBLICATIONS

Boris Ratej, Amor Chowdhury, Rajko Svečko, “Mikrokrmilniški sistem za samodejno usmerjanje mikrovalovnih anten,” Inf. MIDEM, Vol. 32, No. 1, pp. 50–56, Mar. 2002.

Bogdan Dugonik, Ivan Gerlič, Matjaž Debevc, Bojana Globačnik, Ivan Kolenko, Viljenka Šavli, Ljiljana Fabris, Branko Badoko, Video podprto učenje na daljavo: učni pripomoček za učitelje, študente in učence pri poučevanju: VISIOCOM. Maribor, Slovenia: University of Maribor, 2002.

Ivan Gerlič, Matjaž Debevc, Nadja Dobnik, Branislav Šmitek, Danilo Korže, Načrtovanje in priprava študijskih gradiv za izobraževanje na daljavo. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.


Ljubomir Kuljača, Dali Đonlagić, Zoran Vukić, Sajid Tešnjak, Nelinearni sistemi avtomatskega vodenja. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Josip Vrbanec, Amor Chowdhury, Martin Pec, Rajko Svečko, Postopek in priprava robustne standardizacije in klasifikacije realnih objektov. Ljubljana, Slovenia: Patent No. SI 20704 A, May 6, 2002.

Matjaž Debevc, “Uvajanje sodobne informacijske tehnologije v slovenskih zavodih za izobraževanje invalidov,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 45–50.

Matjaž Debevc, “Virtualna video podprta skupnost,” Mednarodna izobraževalna računalniška konferenca MIRK 2002, Piran, Slovenia, May 2002, pp. 109–114.

Matjaž Debevc, Samra Mujačić, “Hypermedia classroom model for distance education,” 3rd International Conference on InformationTechnology Based Higher Education and Training ITHET 2002, Budapest, Hungary, July 2002, 6 pp.

Bogdan Dugonik, Zmago Brezočnik, Matjaž Debevc, “Video production for distance education,” 24th International Conference on Information Technology Interfaces ITI 2002, Cavtat, Croatia, June 2002, pp. 141–145.

Andrej Knuplež, Amor Chowdhury, Eduard Lorencin, Rajko Svečko, “Vodenje sistema krogle na plošči z diskretnim kompenzacijskim regulatorjem,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 209–212.

Zoran Stjepanović, Matjaž Debevc, “Models of distance learning for textile studies,” Biofunktionelle Materialien - Gesundheit durch Textilien: Literaturdatenbank: Programm und Vorträge, 6. Dresdener Textiltaging, Dresden, Germany, 2002, 8 pp.

Josip Vrbanec, Amor Chowdhury, Eduard Lorencin, Rajko Svečko, “Constrains by control design of unstable and nonminimum phase SISO plants with Matlab example,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 205–208.

Josip Vrbanec, Amor Chowdhury, Rajko Svečko, “Limitations for control of unstable and nonminimum phase SISO plants with Matlab example,” CEEPUS Summer School in Fifth symposium on Intelligent systems, Split, Croatia, 2002, 7 pp.


Matjaž Debevc, “Izobraževanje odraslih gluhih in naglušnih na daljavo,” Reforma vzgojno izobraževalnega sistema za otroke s posebnimi potrebami - integracija, inkluzija gluhih in naglušnih oseb: mednarodna okrogla miza, Ljubljana, Slovenia, Dec. 2002, 10 pp.

PRESENTATIONS BY THE LABORATORY MEMBERS

Matjaž Debevc, Alenka Makuc, “Trenutno stanje projekta VISIOCOM,“ keynote lecture at the 2nd seminar for the tutors of Phare Access project VISIOCOM, Faculty of Electrical Engineering and Computer Science and Center za sluh in govor Maribor, Slovenia, Jan. 24–25, 2002.

Matjaž Debevc, “Program razvoja študija na daljavo Univerze v Mariboru,“ lecture at the symposium 3. Trstenjakovi dnevi, Človek – Tehnika – Izobraževanje, Gornja Radgona, Slovenia, Mar. 16, 2002.

Matjaž Debevc, Andrej Tibaut, Ivan Gerlič, “A model for organization of Centre for open and distance education at an university,“ lecture at 3. međunarodni znanstveni skup Informatologija i obrazovanje na daljinu, Rogaška Slatina, Slovenia, Dec. 6–8, 2002.

AU - 12 Signal Processing and Remote Control Laboratory

SIGNAL PROCESSING AND REMOTE CONTROL LABORATORY

Head:

Prof. Dr. Žarko Čučej

Phone: +386 2 220 71 20


RESEARCH PROJECTS


Basic research projects

UNO-ATM-2002 Upravljanje in nadzor omrežij ATM-2002 (Management and supervision of network ATM-2002)

Leader: Prof. Dr. Žarko Čučej Participant: Mihael Kaiser

Financed by: Corporate Research Laboratories of SIEMENS

In this project the basic problems of management and supervision of ATM communication networks were researched. The principles of traffic management and resources scheduling were investigated on the basis of traffic statistical characterization.

K-2D-02 Komprimiranje dvodimenzionalnih signalov '02 (Compression of Two-Dimenzional Signals '02)

Leader: Prof. Dr. Žarko Čučej, Asst. Prof. Dr. Peter Planinšič Participants: Dr. Dušan Gleich, Asst. Prof. Dr. Peter Planinšič, Prof. Dr. Žarko

Čučej

Financed by: Corporate Research Laboratories of SIEMENS, Ministry of Education, Science and Sport of the Republic of Slovenia

In the year 2002 we continued with the research and development of advanced image codecs on the basis of EZW, SPIHT; SFQ and ourselves developed fuzzy context based coding

Signal Processing and Remote Control Laboratory AU - 13

techniques of optical images and rada images (SAR). We published them in established international scientific journals. We developed programs for video coding in program languages java, C++, C#. We researched and confirmed that our fuzzy quality measure of compressed images can also be successfully applied for such advanced codecs as JPEG2000 and SPIHT.

PUBLICATIONS

Dušan Gleich, Peter Planinšič, Žarko Čučej, “Context-based image coding using fuzzy logic,” Opt. eng., Vol. 41, No. 11, pp. 2814–2823, Nov. 2002.

Dušan Gleich, Peter Planinšič, Bojan Gergič, Žarko Čučej, “Progressive space frequency quantization for SAR data compression,” IEEE trans. geosci. remote sens., Vol. 40, No. 1, pp. 3–10, Jan. 2002.

Peter Planinšič, Dušan Gleich, Žarko Čučej, “The constraint optimisation in subband image coding using fuzzy iterative algorithm,” 3rd WSEAS International Conference on Neural Networks and Applications NNA '02, 3rd WSEAS International Conference on Fuzzy Sets and Fuzzy Systems FSFS '02, 3rd WSEAS International Conference on Evolutionary Computation EC '02, Interlaken, Switzerland, Feb. 2002, pp. 98–103.

Dušan Gleich, Peter Planinšič, Žarko Čučej, “Fuzzy coded space frequency quantization,” IEEE international geoscience and remote sensing symposium and the 24th Canadian symposium on remote sensing IGARSS 2002, Toronto, Canada, June 2002, 3 pp.

Peter Planinšič, Dušan Gleich, Žarko Čučej, “The use of fuzzy image quality measure for embedded wavelet coders,” 9th International Workshop on Systems, Signals and Image Processing, Manchester, Great Britain, Nov. 2002, pp. 256–260.

Dušan Gleich, Peter Planinšič, Žarko Čučej, “Fuzzy coded trellis quantization,” 4th IEEE Region 8 International symposium on Video/image processing and multimedia communications VIPromCom-2002, Zadar, Croatia, June 2002, pp. 49–52.

Mihael Kaiser, Žarko Čučej, “Some classification issues in high speed networks,” XVIII međunarodni simpozij Informacione i komunikacione tehnologije, Sarajevo, Bosnia and Herzegovina, Nov. 2001, pp. 26–28.

Peter Cafuta, Bojan Grčar, Žarko Čučej, “PWM-less current controlled VSI-IM drive,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 159–164.

AU - 14 Signal Processing and Remote Control Laboratory


Žarko Čučej, “Context based SAR data compression using fuzzy logic,” lecture at the North West University Evanston, Chicago, USA, June 29, 2002.

CONGRESSES, MEETINGS, AND COMMITTEES

Asst. Prof. Dr. Peter Planinšič: Member of international programme board, WSEAS International Conference on Fuzzy Sets and Fuzzy Systems '02, Interlachen, Switzerland, Feb. 11–14, 2002.

Prof. Dr. Žarko Čučej: Member of international programme board, International Symposium Electronics in Marine 2002, Zadar, Croatia, June 16–29, 2002.

Prof. Dr. Žarko Čučej: Member of international programme board, Intern. Workshop on Systems, Signals and Image Processing '02, Manchester, United Kingdom, Nov. 7–8, 2002.

Asst. Prof. Dr. Peter Planinšič: Reviewer for IEEE Transactions on Fuzzy Systems.

VISITS TO OTHER INSTITUTIONS

Prof. Dr. Žarko Čučej: Visit and invited lecture at Evanston, United States, June 29, 2002.

Asst. Prof. Dr. Peter Planinšič: Visit in the framework of Central European Exchange Program for University Studies, Praha 2, Czech Republic, Sept. 1–30, 2002.

Asst. Prof. Dr. Peter Planinšič: Active participation in Networking group all ipv6-world in the framework of istevent2002: presentation of Eoi for NoE ''Advanced image and video coding techn. and dig. modulation techniques for fast IP...'', Copenhagen, Denmark, Nov. 4–6, 2002.

Signal Processing and Remote Control Laboratory AU - 15

DECORATIONS, AWARDS, AND HONOURS

Dr. Jože Mohorko: Vratislav Bedjanič Award for PhD thesis entitled “Automatic justification of geometric parameters of monitors.” Advisor: Prof. Dr. Žarko Čučej, Nov. 22, 2002.

AU - 16 Process Automation Laboratory

PROCESS AUTOMATION LABORATORY

Head:

Assoc. Prof. Dr. Boris Tovornik

Phone: +386 2 220 71 60


RESEARCH PROJECTS



LPA-DN Diagnostika napak (Fault Diagnosis)

Leader: Assoc. Prof. Dr. Boris Tovornik Participants: Stojan Peršin, Asst. Prof. Dr. Nenad Muškinja, Alojz Hojnik

Most modern approaches are model-based thus some fault detection methods using analytical redundancy were investigated and principles were outlined for some of the most important techniques of model-based residual generation using parameter estimation, parity space and state estimation approaches. A non-linear state estimation observer and a velocity based linearization were used as the real systems are usually non-linear. A water vessel of a heat exchanger was chosen for the experiment. Although there was no water level sensor installed in it, the leakage of the vessel was successfully detected.

Applied project

L2-3436-0796 Mehko krmiljenje digitalnih varilnih izvorov za MIG/MAG elektroobločna postopka varjenja (Digital Fuzzy Welding Control in MIG/MAG Gas Metal Arc Welding)

Leader: Asst. Prof. Dr. Marjan Golob Participants: Assoc. Prof. Dr. Boris Tovornik; Asst. Prof. Dr. Nenad Muškinja;

Asst. Prof. Dr. Marjan Golob; Aleksander Polutnik, MSc; Stojan

Process Automation Laboratory AU - 17

Peršin; Alojz Hojnik; Miloš Vute

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Varstroj, d. d.

The dynamic characteristic of a self-regulated, consumable electrode-welding arc (MIG/MAG GMAW) was studied where the torch-to-work-piece distance varies with time. This self-regulation process was modelled analytically and various dynamic models developed. The GMAW dynamic model considering a current model, burn-off model, droplet transfer model, and weld pool width model, were prepared for computer simulation. Computer simulations were used to obtain a better understanding of the mechanisms, which change arc voltage and current in response to changes in arc length. Mathematical model was simulated using MATLAB 6.1/SIMULINK 3.0.

The measure system for measuring a welding current and a welding voltage was built and successful MIG/MAG welding measurements were taken. This system consists of the digital oscilloscope Agilent 54621A, PC with IEEE-GPIB Agilent 82350 PCI interface and a welding robot OTC Daihen DR-4200L. The data acquisition application software is based on LabView 6.0

The preliminary research, based on experimental welding data aimed at indicating potential applications of fuzzy logic to the analysis of weld quality by means of measurable electric signals, was carried out. Thus a simple fuzzy system was elaborated, which is able to quite efficiently assess the weld quality on the basis of the time variations of the welding voltage and current, and the short-circuit times in a particular time window. This system included 125 rules, which are chosen from experience and without any additional optimization.

Research and development project

LPA-IH Inteligentna hiša (Intelligent House)

Leader: Assoc. Prof. Dr. Boris Tovornik Participants: Stojan Peršin; Asst. Prof. Dr. Nenad Muškinja; Aleksander Polutnik,

MSc; Alojz Hojnik

A model of a smart home was made using LonWorks technology. It has two rooms and a basement. Every room represents a node. The basic components of LonWorks technology were used: Neuron, transceiver for communication on network, I/O driver with surroundings, and a control network with LonTalk protocol. The model of an intelligent home is used for several tests using different approaches for control and connections between sub-systems.



IST 2001 32316 INES – Industrial Embedded systems

Leader: Aleksej Jerman Blažič (SETCCE – Security Technology Competence Centre)

Participants: Assoc. Prof. Dr. Boris Tovornik; Asst. Prof. Dr. Nenad Muškinja; Asst. Prof. Dr. Marjan Golob; Aleksander Polutnik, MSc

Project partners: ULTRA Company; GENERA, d. o. o.; SETCCE – Security Technology Competence Centre

Financed by: European Commission, Information Systems Technology

During the first three months, INES initial training material was conceived to provide a common reference background on the Technologies promoted.

The General Training was structured using the following topics: The push for embedded open source; Market analysis; The Open Source Philosophy; Open Source Operating Systems. Also a specific training course was tuned to particular projects. The company engineers attended the successful Linux training course, which included:

– Introduction and analysis of Linux operating systems, which are suitable for embedded solutions.

– Introduction and selection of Open Source base Linux distribution packages and the introduction and application of Linux development kits.

RoboLab Control systems and automation in marine vehicles

Leader: Zoran Vukić (Department of Control and Computer Engineering and Automation, Faculty of Electrical Engineering and Computing, University of Zagreb)

Participants: Assoc. Prof. Dr. Boris Tovornik, Satko Mandjuka, Guy O. Beale, Mogens Blanke, Ljubomir Kuljača

Project partners: Brodarski Institute Zagreb, Technical University of Denmark, Automation at Oersted.DTU, George Mason University, Faculty of Electrical Engineering and Computing, University of Zagreb

Financed by: Ministry of Science and Technology of the Republic of Croatia

The aim of this research is the realisation of a marine vehicle system, qualified for autonomous decisions and the co-ordination of tasks and goals for a vehicle which has to be completely autonomous and without human participation.


CEEPUS – CZ 103 CEEPUS – project

Leader: Assoc. Prof. Dr. Boris Tovornik Project partners: Czech Technical University Prague, Danube University of Krems,

Faculty of Electrical Engineering and Communication, Brno University of Technology, Faculty of Electrical Engineering and Computing, University of Zagreb, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Faculty of Chemical Engineering and Technology, University of Zagreb, Faculty of Mechanical Engineering, Brno University of Technology, Faculty of Natural Sciences, Mathematics and Education, University of Split, Graz University of Technology, Technical University of Gabrovo, Technical University of Sofia – Branch Plovdiv, Kielce University of Technology, University of Miskolc, Viena University of Technology

Financed by: CEEPUS

In 2002, we were co-organizer of the Summer School "Modern Methods in Control", which was organized in Split, Croatia (June 16 – June 30, 2002) by the University of Split. The main topics were: Monitoring and Control of Distributed Systems over Internet, User Interfaces in Educational Software, Advanced Process Control, Matlab Applications in Modelling and Control, Neural Network and Fuzzy Logic in Modelling and Control, Expert System & Knowledge Based Control, Intelligent Tutoring Systems and Web Application in Distance Learning.


Industrial project

LPA-TEŠ Testiranje sistema za obvladovanje kronologije dogodkov v TEŠ (Testing of the system for event chronology and supervision in TEŠ (termal power plant Šoštanj))

Leader: Assoc. Prof. Dr. Boris Tovornik Participant: Asst. Prof. Dr. Nenad Muškinja Project partner: Metronik, d.o.o.

Financed by: Metronik, d. o. o.

Duration: Apr. to Dec. 2002


The objective of the project was the testing of the system for event chronology and supervision with 5 ms resolution and eventless storage. For this purpose a system for digital signal generation was built as an event simulator. It consists of: – 64 digital channels (24 V) generator with 1 ms resolution, continuous operation and

upgradeable to an arbitrary numbers of channels, – Computer supervision and generation of various test sets and – Verification tool.

PUBLICATIONS

Stojan Peršin, Boris Tovornik, Nenad Muškinja, “Povezava merilnih signalov in Matlaba preko procesnega strežnika,” Inf. MIDEM, Vol. 32, No. 2, pp. 115–122, June 2002.

Drago Valh, Boris Tovornik, Zoran Vukič, “Safety problems and fault detection in process industry,” J. Elektr. Eng., Vol. 53, 5–6, pp. 167–176, 2002.

Stojan Peršin, Boris Tovornik, Nenad Muškinja, Drago Valh, “Increasing process safety using analytical redundancy,” Electrotechnical Review, Vol. 69, No. 3/4, pp. 240–246, 2002.

Nenad Muškinja, Boris Tovornik, Robert Lazič, “Projekt avtomatizacije laboratorijskega toplotnega izmenjevalnika,” Svet elektron., Vol. 9, No. 83, pp. 13–22, 2002.

Ladislav Mikola, Marjan Golob, Meritve: merilne metode in laboratorijske vaje. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Ljubomir Kuljača, Dali Đonlagić, Zoran Vukić, Sajid Tešnjak, Nelinearni sistemi avtomatskega vodenja. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Marjan Golob, Arpad Köveš, Aleš Puklavec, Boris Tovornik, “Modelling, simulation and fuzzy control of the GMAW welding process,” 15th Triennial World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 2002, 6 pp.

Marjan Golob, Boris Tovornik, “Decomposed neuro-fuzzy ARK model,” International Conference on Fuzzy Systems, Advances in soft computing AFSS 2002, Calcutta, India, Feb. 2002, pp. 260–266.

Arpad Köveš, Marjan Golob, “Fuzzy logic based quality monitoring in short-circuit gas metal arc welding,” Arc welding and production processes, Copenhagen, Denmark, and Lisbon, Portugal, 2002, pp. 177–190, IIW Doc. XII–1712–02.


Stojan Peršin, Boris Tovornik, Nenad Muškinja, “Interoperability between industrial automation applications and Matlab/simulink environment,” Slovenská spoločnost pre kybernetiku a informatiku, Trebišov, Slovakia, 8 pp.

Borut Kvar, Janez Križan, Marjan Golob, Boris Tovornik, “Automation of the alumina dryer,” Slovenská spoločnost pre kybernetiku a informatiku, Trebišov, Slovakia, 8 pp.

Stojan Peršin, Boris Tovornik, Nenad Muškinja, Drago Valh, “Fault detection and diagnosis of laboratory heat exchanging device,” CEEPUS Summer School in Fifth symposium on Intelligent systems, Split, Croatia, 2002, 9 pp.

Marjan Golob, Boris Tovornik, “Neuro-fuzzy modeling based on decomposed ARX structures,” CEEPUS Summer School in Fifth symposium on Intelligent systems, Split, Croatia, 2002, 6 pp.

Nenad Muškinja, Stojan Peršin, Boris Tovornik, “Automation of laboratory heat exchanging device,” CEEPUS Summer School in Fifth symposium on Intelligent systems, Split, Croatia, 2002, 8 pp.

Stojan Peršin, Boris Tovornik, “Using OPC for the process control in Matlab environment,” CEEPUS Summer School in Fifth symposium on Intelligent systems, Split, Croatia, 2002, 6 pp.

Nenad Muškinja, Stojan Peršin, Boris Tovornik, “Control of laboratory heat exchanging device with fuzzy tuning PID controller,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 197–200.

Stojan Peršin, Boris Tovornik, Nenad Muškinja, “Detekcija napake na pretočnem grelniku s pomočjo hitrostne linearizacije,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 311–314.

Barbara Brezovec, Metod Hrovatič, Drago Jakopič, “Regulacija nivoja tekočine v dveh povezanih posodah,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 427.


Assoc. Prof. Dr. Boris Tovornik: Member of international programme board and rewiever, CEEPUS Summer School Modern Methods in Control, Split, Croatia, June 16–30, 2002.

Assoc. Prof. Dr. Boris Tovornik: Member of international programme board,


International Conference on Cybernetics and Informatics, Trebišov, Slovakia, Sept. 4–6, 2002.

Asst. Prof. Dr. Marjan Golob: Reviewer for ISA Transactions.

Asst. Prof. Dr. Marjan Golob: Reviewer for Applied Soft Computing.


Božo Bratina: Exchange of students in the CEEPUS CZ–103 programme, Praha 2, Czech Republic, June 1–30, 2002.

Dalibor Tadić: Exchange of students in the CEEPUS CZ–103 programme, Brno, Czech Republic, June 1–30, 2002.

Asst. Prof. Dr. Marjan Golob, Asst. Prof. Dr. Nenad Muškinja, Assoc. Prof. Dr. Boris Tovornik:

Lecturing at the Summer School Modern Methods in Control, meeting participation, Split, Croatia, June 16–30, 2002.

Assoc. Prof. Dr. Boris Tovornik: Scientific collaboration within the framework of the RoboLab project, Zagreb, Croatia, Nov. 10, 2002.

GUESTS AND VISITORS

Nenad Bolf (Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia):

Exchange of professors in the CEEPUS CZ–103 programme, Mar. 1–31, 2002.

Martina Svadova (Czech Technical University Prague, Praha 2, Czech Republic):

Exchange of students in the CEEPUS CZ–103 programme, postgraduate research work, Apr. 1–30, 2002.

Petr Huška, Michal Kutil (Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic):

Exchange of students in the CEEPUS CZ–103 programme, postgraduate research work, May 1–31, 2002.


Ljubomir Kuljača, Zoran Vukić (Department of Control and Computer Engineering and Automation, Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb, Croatia):

Bilateral cooperation between Process Automation Laboratory and Department of Control and Computer Engineering in Automation, University of Zagreb, 5 visits per year, Oct. 15, 2002.


Assoc. Prof. Dr. Boris Tovornik: Silver Medal of University of Maribor for year 2002, Sept. 18, 2002.

AU - 24 Measurements Laboratory

MEASUREMENTS LABORATORY

Acting Head:

Assoc. Prof. Dr. Vojko Matko

Phone: +386 2 220 71 11


RESEARCH PROJECTS



LEM – GPSPB Primerjava merjenja pozicije objekta ob uporabi GPS signalov in različnih baz podatkov (Comparison of Measurements of Object Position using GPS Signals and Various Databases)

Leader: Assoc. Prof. Dr. Vojko Matko

A comparison of position measuring with Jeppersen, Autoroute and "Atlas Slovenije" databases clearly shows measurement error. The latter depends upon the signal reception, calibration and the original map. Measuring uncertainty is also subject to the date used, size of the area observed at a given moment and to accurate/precise timing. When using city maps, calibration is much better if it is set to 2 points rather than the spherical 3, 4, 5 or 6 points. In mid-size areas, a calibration set to 4 points gives very good results. The measurement error is also subject to the smaller number of visible satellites in a spherical angle of 60° vertically above us. When receiving satellites on the horizon, the measurement error is greater due to the influence of the ionosphere.

Measurements Laboratory AU - 25


LEM – MMAEN Merjenje materialov (obutvena industrija), ki lahko akumulirajo električni naboj (Measuring of Materials (Shoemaking Industry) that Can Create Electrical Charge)

Leader: Ladislav Mikola, MSc Participant: Miloš Vute Project partner: Konitex, d. o. o.

Financed by: Konitex, d. o. o.

In 2002, a large number of surface resistance measurements of sample materials with various degrees of admixtures for improving electric conductivity were carried out. All measurements were carried out in line with the DIN 54345/5 standard as requested by the client ordering the research. The measured resistance values ranged – depending on the type and degree of admixtures – between 1 kΩ and 200 kΩ and over. Lower resistance values were measured at voltages lower than the requested 100 V DC, in order to meet the requirement that the current should not exceed 10 mA. Other measurements were carried out at a voltage of 100 V.

Industrial project

LEM – MUM Merjenje upornosti materialov, ki lahko akumulirajo električni naboj (Measuring Resistance of Materials that can Accumullate the Electric Charge)

Leader: Ladislav Mikola, MSc Participant: Miloš Vute Project partner: Konus Konex, d. o. o.

Financed by: Konus Konex, d. o. o.

During 2002, a large number of surface resistance measurements for filter material samples with various admixtures to increase the electrical conductivity were carried out. All measurements were performed in accordance with the DIN 54345/ part 5 standard as requested by the client ordering the research. The measured resistance values amounted to values between 1 kΩ and 10 MΩ and above depending on the admixtures. Smaller resistance values were measured at voltage lower than the requested 100 V DC to meet the request that the current may not exceed 10 mA. All other measurements were performed at a voltage of 100 V.



Applied projects

LEM – TSKO Temperaturna stabilizacija kvarčnega oscilatorja nad področjem serijske resonančne frekvence (Temperature Stabilization of Quartz Oscillator above the Serial Resonant Frequency Range)

Leader: Assoc. Prof. Dr. Vojko Matko



Researched were the pulling influence with regard to frequency stability and the temperature influence. By increasing the value of pulling, the influence in temperature instability of quartz oscillation is increased. To this end, additional stabilization of quartz oscillation is required using external elements having multiple functions. Among these elements there are special resistors and capacitors with accurately defined temperature characteristics. Side influences are compensated by symmetrical construction of the measuring circuit. To date, the results have shown significantly (10 times) reduced temperature influence.

LEM – LANOI Merjenje preko LAN omrežja in interneta (Measurement via LAN Network and Internet)

Leader: Assoc. Prof. Dr. Vojko Matko Participants: Dr. Bojan Gergič, Darko Hercog



Using our laboratory measurement equipment, data acquisition card, GPIB-interfaced measurement equipment and LabVIEW 6.1, we have implemented a remote laboratory over the Internet, capable of achieving real distance learning solutions. The LabVIEW 6.1 run-time engine and browser plug-in are required on the client machine for executing in a browser. Thus, students can perform exercises remotely from a standard Web browser without installing LabVIEW.



LEM – IROLP Izgradnja računalniškega omrežja za laboratorijske potrebe (Lab Computer Network Development)

Leader: Assoc. Prof. Dr. Vojko Matko Participants: Dr. Bojan Gergič; Ladislav Mikola, MSc; Miloš Vute; Stanislav

Lampič; Darko Hercog



A computer network for a modern measurements laboratory was set up. The network is made up of Windows 2000 Server and Windows XP Workstations grouped in Active Directory domain. A domain is administered as a unit with common rules and procedures defined by Group Policy. Group Policy is the administrator's primary tool for defining and controlling how programs, network resources, and the operating system behave for users and computers in a domain. The user profiles are roaming which means that they are downloaded to the local computer when a user logs on and updated on the server when the user logs off. This preserves student's settings when they move from one computer to another. Every student in a domain has a personal folder that is redirected to the server. Folder redirection reduces the network traffic and enables a student to access his personal folder by using remote access VPN (Virtual Private Networking) connection across the Internet.

PUBLICATIONS

Dušan Gleich, Peter Planinšič, Bojan Gergič, Žarko Čučej, “Progressive space frequency quantization for SAR data compression,” IEEE trans. geosci. remote sens., Vol. 40, No. 1, pp. 3–10, Jan. 2002.

Ladislav Mikola, “Meroslovne zahteve za merilne instrumente, ki se uporabljajo za merjenje izolacijske upornosti, impedačne zanke, ozemljitvene upornosti povezav in povezav za izenačitev potencialov in ozemljitvene upornosti,” ER (Ljubl.), No. 3, pp. 33–34, 2002.

Ladislav Mikola, “Standardizirano merjenje upornosti materialov, ki lahko akumulirajo elektrostatični naboj,” ER (Ljubl.), Vol. 3, No. 1, pp. 37–40, Mar. 2002.

Gorazd Lipnik, Vojko Matko, “Genetic algorithm in optimisation of measurement system,” Advances in intelligent systems, fuzzy systems, evolutionary computation (Artificial intelligence series), pp. 307–310.


Ladislav Mikola, Marjan Golob, Meritve: merilne metode in laboratorijske vaje. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Darko Hercog, “Programiranje DSP2 kartice s pomočjo Matlab-Simulink-a,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 433–434.


Assoc. Prof. Dr. Vojko Matko: Java measurement applications development, research work, Slovenj Gradec, Slovenia, Mar. 5, 2002.

Assoc. Prof. Dr. Vojko Matko: Research program applications development, research work, Velenje, Slovenia, Apr. 3, 2002.

Assoc. Prof. Dr. Vojko Matko: Further lab equipment development, research work, Velenje, Slovenia, May 8, 2002.

Assoc. Prof. Dr. Vojko Matko: Preparation for the 6th Framework Program, scientific collaboration, Ljubljana, Slovenia, June 6, 2002.

Ladislav Mikola, MSc: Plenary session and visit of laboratory, Velenje, Slovenia, June 20, 2002.

Dr. Bojan Gergič: Installation and calibration of the system for recognition of radiators with computer vision, research work, Lenart, Slovenia, July 2–15, 2002.

Assoc. Prof. Dr. Vojko Matko: Satellite signal-based measurements, scientific collaboration, Ljubljana, Slovenia, July 3, 2002.

Dr. Bojan Gergič: Seminar on didactics, seminar participation, Maribor, Slovenia, Sept. 9–19, 2002.

Dr. Bojan Gergič: Handover of system for recognition of radiators with computer vision, formal call, Lenart, Slovenia, Sept. 13, 2002.

Assoc. Prof. Dr. Vojko Matko: New measurement applications development,


research work, Radeče, Slovenia, Oct. 2, 2002.

GUESTS AND VISITORS

Jožef Tomažič (Slovene Railway Company, Celje, Slovenia):

Co-operation agreement concerning development of metrology laboratory of Slovene Railway Company, Jan. 15, 2002.

Emil Jeromel, Dr. Franc Seme (TCL, Testing and Certification Laboratories, Velenje, Slovenia):

Co-operation agreement with TCL Laboratory in Velenje, Oct. 7, 2002.

Drago Krenker (Prevent, d. o. o., Slovenj Gradec, Slovenia):

Java measurement applications development, research work, Nov. 12, 2002.

Matej Krajnc (Radeče, Slovenia):

New measurement applications development, visit, Dec. 10, 2002.

Darko Lihteneker (Šolski center Velenje, Velenje, Slovenia):

Further lab equipment development, visit, Dec. 15, 2002.

AU - 30 Electro-Optics and Sensor Systems Laboratory

ELECTRO-OPTICS AND SENSOR SYSTEMS LABORATORY

Head:

Asst. Prof. Dr. Denis Đonlagić

Phone: +386 2 220 71 14


RESEARCH PROJECTS


Applied projects

MOMKT Miniaturni optični merilnik krvnega tlak (Miniature optical blood pressure sensor)

Leaders: Asst. Prof. Dr. Denis Đonlagić, Edvard Cibula


This project will demonstrate miniature blood pressure sensors for applications in in-vitro diagnostics. The technology is based on the surface micro-machining of silica fiber based on HF etching and application of a specially designed polymer membrane that is deposited on the tip of the etched fiber.

FOIBD Precizijsko uravnovešanje vlakenskih interferometrov (Precise balancing of fiber optic interferometers)

Leader: Asst. Prof. Dr. Denis Đonlagić Participant: Irvin Sirotič


This project resulted in a system for the precise balancing of Michelsomn and Mach-Zhender types of fiber optic interferometers. The system can balance an arbitrary fiber interferometer within an optical path length difference that is less than 5um. This technology enables further development of a variety of measurement and photonic devices.

Electro-Optics and Sensor Systems Laboratory AU - 31

FOVAD Optični vlakenski detektorji osi (Fiber optic vehicle axle detectors)

Leader: Asst. Prof. Dr. Denis Đonlagić Participants: Edvard Cibula, Marjan Hanč Project partner: Mikrobit, d. o. o.

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Mikrohit, d. o. o.

The aim of this project is do develop a new generation of vehicle axle detectors. The proposed detector is based on fiber optic interferometry which is embedded in the upper layer of the asphalt. This system is based on special signal processing that allows for a cost-effective design of the final system.

PUBLICATIONS

Denis Đonlagić, “A robust miniature acoustical liquid level gauge with micrometer resolution,” Rev. sci. instrum., Vol. 73, No. 2, pp. 464–467, Feb. 2002.

Irvin Sirotić, Denis Đonlagić, “System for precise balancing and controlled unbalancing of fiber-optic interferometers,” Appl. opt., Vol. 41, No. 22, pp. 4471–4476, Aug. 2002.

Edvard Cibula, Denis Đonlagić, Črtomir Stropnik, “Miniature fiber optic pressure sensor for medical application,” IEEE sensors 2002, 4 pp.

Edvard Cibula, Denis Đonlagić, “Nizkoherenčni interferometer s termičnim modulatorjem in njegova uporaba v senzorski tehniki,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 77–80.


Asst. Prof. Dr. Denis Đonlagić: Research work in the field of optical fibers, Corning NY, United States, July 24 to Sept. 4, 2002.

Institute of Electronics EL – 1

INSTITUTE OF ELECTRONICS

Head:

Prof. Dr. Bogomir Horvat

Phone: +386 2 220 72 00


URL: http://www.elektronika.uni-mb.si

The Institute of Electronics has 34 employees including 1 full professor, 4 associate professors, 3 assistant professors, assistants, researchers, and technical staff. The activities of the institute support also 7 part-time employees. The main activities of the Institute of Electronics are teaching graduate and postgraduate courses and research. Research is currently focused on one fundamental research project, which is financed by the Ministry of School, Science and Sport of the Republic of Slovenia, projects with local industry, six international projects and projects with foreign industry partners.

The members of the Institute of Electronics lead and participate also in the educational and research activities from the Institute of Telecommunication. In the year 2002 the research was focused on the design of modern telecommunication systems and on development of telecommunication services.

In 2002, the Institute of Electronics staff published 116 papers presenting the findings of its research, organised meetings and conferences, and visited several institutes. The primary areas of study at the Institute of Electronics are speech recognition, language technology, multimedia systems, electronic circuits, digital filters, microcomputer structures, formal verification of distributed systems, and digital signal processing.

EL – 2 Institute of Electronics

Members of the Institute of Electronics are organised into four laboratories and two centres of technology.

Digital and Information Systems Laboratory


Employees: Assoc. Prof. Dr. Marko Jagodič; Asst. Prof. Dr. Mitja Solar; Janez Stergar, MSc; Rado Slatinek, MSc; Iztok Kramberger, MSc; Andrej Žgank, BSc; Tomaž Rotovnik, BSc; Damjan Vlaj, BSc; Aleksandra Zögling Markuš, Ing.

Digital and Information Systems

Laboratory Head:


Electronics Systems

Laboratory Head:

Assoc. Prof. Dr. Rudolf Babič

Microcomputer Systems

Laboratory Head:


Digital Signal Processing Laboratory

Head: Assoc. Prof. Dr. Zdravko Kačič

Institute of Electronics Head:


Institute of Electronics EL – 3

Microcomputer Systems Laboratory

Head: Assoc. Prof. Dr. Zmago Brezočnik

Employees: Assoc. Prof. Dr. Tatjana Kapus; Bogdan Dugonik, MSc; Aleš Časar, MSc; Filip Samo Balan, MSc; Andrej Kruščič, BSc; Robert Meolic, MSc; Boštjan Vlaovič, BSc; Peter Vicman, BSc; Aleksander Vreže, BSc

Digital Signal Processing Laboratory


Employees: Dr. Mirjam Sepesy Maučec; Matej Rojc, MSc; Marcel Ogner, Ing.; Srečko Grašič, BSc; Vladimir Hozjan, BSc; Bojan Kotnik, BSc; Robert Veronik, BSc; Daniel Čeh Ambruš, BSc

Centre for Language Technologies


Electronic Systems Laboratory

Head: Assoc. Prof. Dr. Rudolf Babič

Employees: Assoc. Prof. Dr. Tomaž Dogša; Asst. Prof. Dr. Franc Jurkovič; Gerhard Angleitner, MSc; Bojan Jarc, MSc; Matej Šalamon, MSc; Davorin Osebik, MSc; Branko Drevenšek, BSc; Anton Vesenjak, Ing.

Centre for Verification and Validation of Systems

Head: Assoc. Prof. Dr. Tomaž Dogša

EL - 4 Digital and Information Systems Laboratory

DIGITAL AND INFORMATION SYSTEMS LABORATORY

Head:


Phone: +386 2 220 72 00


RESEARCH PROJECTS


Applied project

POLIDAT Telefonska govorna baza POLIDAT (Telephone Speech database POLIDAT)

Leader: Prof. Dr. Bogomir Horvat Participants: Assoc. Prof. Dr. Zdravko Kačič; Matej Rojc, MSc; Aleksandra

Zögling Markuš; Robert Veronik

In the year 2002 a lot of work was concentrated on the collection of database recordings. The speakers in the database were predominantly recruited from the Telekom of Slovenia employees according to the desired dialect, age and sex distributions. A small number of speakers were drafted from the students and employees of the University of Maribor. Currently the database consists of 400 different speakers for each part (mobile, fixed).


VVIGTO Evaluation of multilingual speech resources and tools

Leader: Prof. Dr. Bogomir Horvat Participants: Assoc. Prof. Dr. Zdravko Kačič; Dr. Mirjam Sepesy Maučec; Matej

Rojc, MSc; Janez Stergar, MSc; Vladimir Hozjan; Andrej Žgank; Tomaž Rotovnik; Bojan Kotnik

Financed by: Ministry of Education, Science andSport of the Republic of Slovenia;

Digital and Information Systems Laboratory EL - 5

Ministry of External Affairs of Spain

The goal of the project is to gain new knowledge and experiences in the field of multilingual spoken language resources and automatic speech recognition. The focus of the proposed cooperation is the analysis and evaluation of language resources and methods for acoustic–phonetic modelling. This research also includes methods of language modelling based on independent language approach, i.e. statistical language modelling. The experimental work is based on the use of SpeechDat databases for Spanish and Slovenian languages.

A structure of autoassociative neural network classificator for prosody label prediction.

JTK Language Technologies in Communication

Leader: Prof. Dr. Bogomir Horvat Participants: Assoc. Prof. Dr. Zdravko Kačič; Janez Stergar, MSc; Matej Rojc,

MSc; Dr. Mirjam Sepesy Maučec Project partner: Ministry of Science and Technology of the Republic of Croatia

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Ministry of Science and Technology of the Republic of Croatia


This research work encompasses the analysis of psychological and communication factors that influence person to person and person to machine speech communication. We will perform an analysis of the target application domains of speech technology (query services, transaction services, office automation etc.) and will specify the critical factors of each application domain.



VSTCG Multilingual text-to-speech synthesiser

Leader: Prof. Dr. Bogomir Horvat Participants: Assoc. Prof. Dr. Zdravko Kačič; Janez Stergar, MSc; Matej Rojc,

MSc; Vladimir Hozjan; Bojan Kotnik Project partner: Corporate Research Laboratories of SIEMENS



In the year 2002 a lot of work within the scope of this project was done in the development of needed language resources, e.g. speech database, morphology and a phonetic dictionary (Simlex in Siflex 20.000 root forms), POS-tagged corpus (about 7000 sentences). An automatic system for speech database analysis was also developed, needed for the machine learning of models for prediction of symbolic and acoustic prosody in the process of speech synthesis from any text. All models of the PLATOS TTS system are already in the final development stage for version 1.0 and use new innovative resolutions in the sense of time and space optimal solution and also solving various problems regarding multilinguality and existing algorithms for the processing of acoustic signals, and automatic prediction of various linguistic and acoustic parameters.

PUBLICATIONS

Janez Kaiser, Bogomir Horvat, Zdravko Kačič, “Overall risk criterion estimation of hidden Markov model parameters,” Speech commun., Vol. 38, No. 3/4, pp. 383–398, Nov. 2002.

Matej Rojc, Zdravko Kačič, Iztok Kramberger, “Hardware implementation of language resources for embedded systems,” Inf. MIDEM, Vol. 32, No. 3, pp. 199–203, Sept. 2002.


Janez Stergar, Bogomir Horvat, “Prediction of symbolic prosody breaks with neural nets,” Inf. MIDEM, Vol. 32, No. 3, pp. 213–218, Sept. 2002.

Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “Predstavitev učinkovitega postopka za robustno avtomatsko razpoznavanje govora,” Electrotechnical Review, No. 1, Vol. 69, pp. 69–74, 2002.

Tomaž Rotovnik, Bogomir Horvat, Zdravko Kačič, “Analiza uspešnosti razpoznavalnikov ISIP, HTK in Julius pri razpoznavanju tekočega slovenskega govora,” Electrotechnical Review, Vol. 69, No. 5, pp. 253–258, 2002.

Bogomir Horvat, “Denarna odškodnina za duševne bolečine zaradi zmanjšanih življenjskih aktivnosti,” Prav. praksa (Ljubl.), Vol. 21, No. 31, pp. 26–30, Sept. 2002.

A. Sammut in 16 avtorjev, “Network aspects of dynamic satellite multimedia systems,” Satellite personal communications for future-generation systems: final report – COST 252 Action. London: Springer 2002, pp. 23–120.

Bogomir Horvat, Janez Stergar: Večpredstavnost: multimedijski sistemi. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Marko Jagodič, Digitalne telekomunikacije: kompendij. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Bojan Kotnik, Damjan Vlaj, Zdravko Kačič, Bogomir Horvat, “Robust MFCC feature extractional algorithm using efficient additive and convolutional noise reduction procedures,” 7th international conference on spoken language processing ICSLP 2002, Denver, USA, Sept. 2002, pp. 445–448.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “A comparison of HTK, ISIP and julius in Slovenian large vocabulary continuous speech recognition,” 7th international conference on spoken language processing ICSLP 2002, Denver, USA, Sept. 2002, pp. 681–684.

Achim F. Müller, Janez Stergar, Bogomir Horvat, “Designing prosodic databases for automatic modeling of Slovenian language in a multilingual TTS System,” Third international conference on language resources and evaluation LREC 2002, Las Palmas de Grand Canaria, Spain, May 2002, Vol. 1, pp. 288–292.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Preliminary evaluation of Slovenian mobile database PoliDat” Third international conference on language resources and evaluation LREC 2002, Las Palmas de Grand Canaria, Spain, May 2002, Vol. 2, pp. 564–568.


Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “Large vocabulary speech recognition of Slovenian language using data-driven morphological models,” 5th International Conference Text, speech and dialogue TSD 2002, Brno, Czech Republic, Sept. 2002, pp. 329–332.

Andrej Žgank, Tomaž Rotovnik, Zdravko Kačič, Bogomir Horvat, “Uniform speech recognition platform for evaluation of new algorithms,” 5th International Conference: Text, speech and dialogue TSD 2002, Brno, Czech Republic, Sept. 2002, pp. 333–336.

Janez Stergar, Bogomir Horvat, “Building a multimedia presentation of different media types,” 25th International Convention MIPRO, Opatija, Croatia, May 2002, pp. 49–52.

Robert Veronik, Rado Slatinek, Bogomir Horvat, “Multimedia application for teaching and learning telecommunication protocols,” 4th IEEE Region 8 International symposium on Video/image processing and multimedia communications VIPromCom-2002, Zadar, Croatia, June 2002, pp. 31–34.

Janez Stergar, Bogomir Horvat, “Implementing digital video into time line based authoring environments,” 4th IEEE Region 8 International symposium on Video/image processing and multimedia communications VIPromCom-2002, Zadar, Croatia, June 2002, pp. 427–430.

Bojan Imperl, Uroš Novak, “Multi-access services and platforms,” IV međunarodno savjetovanje o telekomunikacijama, Sarajevo, Bosnia and Herzegovina, Oct. 2002. god., pp. 141–145.

Janez Stergar, “Uspešnost napovedovanja prozodičnih mej z arhitekturo klasifikacije napak samodejno-asociativnih nevronskih mrež,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 39–43.

Darinka Verdonik, Matej Rojc, Zdravko Kačič, Bogomir Horvat, “Zasnova in izgradnja oblikoslovnega in glasovnega slovarja za slovenski knjižni jezik,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 44–48.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Bogomir Horvat, “Jezikovno neodvisno modeliranje pregibnega jezika,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 53–57.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, “Uporaba algoritma ROVER pri prepoznavanju slovenskega govora,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 58–61.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Prenos razpoznavalnika govora na nov jezik in vpliv jezikovnih skupin,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 67–71.


Andrej Žgank, Matej Rojc, Bojan Kotnik, Damjan Vlaj, Mirjam Sepesy Maučec, Tomaž Rotovnik, Zdravko Kačič, Aleksandra Zögling Markuš, Bogomir Horvat, “Govorno voden informacijski portal Lentinfo – predhodna analiza rezultatov,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 72–77.

Gordan Sket, Bojan Imperl, “M-vstopnica - uporaba avtomatskega razpoznavanja govora v praksi,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 116–119.

Davorin Osebik, Mitja Solar, Rudolf Babič, “Modul adaptivnega sita za digitalno procesiranje signalov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 45–48.

Bogomir Horvat, “Overview of research activities in the field of language technologies at the University of Maribor, Slovenia,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 7–29.

Janez Stergar, Vladimir Hozjan, “First attempts in word prominence determination,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 183–190.

Vladimir Hozjan, Janez Stergar, “Determination of prominence accent of prosodic segments in emotional speech,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 229–235.

Andrej Žgank, “First step toward speech recognition test platform,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 255–262.

Tomaž Rotovnik, “Search algorithms for continuous speech recognition,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 263–268.

Bojan Imperl, Uroš Novak, “Večdostopnost v telekomunikacijskih storitvah,” Objektna tehnologija v Sloveniji OTS '02, Maribor, Slovenia, June 2002, pp. 116–122.


Prof. Dr. Bogomir Horvat: Board meeting of the Interface project, Barcelona, Spain, May 8, 2002.

EL - 10 Electronic Systems Laboratory

ELECTRONIC SYSTEMS LABORATORY

Head:

Assoc. Prof. Dr. Rudolf Babič

Phone: +386 2 220 72 30


RESEARCH PROJECTS


Basic research projects

IADSSPLV Izvedba adaptivnih digitalnih sit s programirnimi polji logičnih vezij (Adaptive Digital Filters Realization with Field Programmable Gate Arrays)

Leader: Assoc. Prof. Dr. Rudolf Babič Participant: Davorin Osebik, MSc

The main aim of this permanent project is the realization of higher-order, adaptive nonrecursive digital filters with field-programmable gate arrays, FPGA circuits. We have found that distributed arithmetic is well suited for this research. The scope of our research is the investigation of distributed arithmetic structures with ROM-accumulator architecture and distributed arithmetic structures with online calculation of partial sums of coefficients.

They have ROM capabilities as low as possible and also offer the realization of higher-order, nonrecursive digital filters with high-speed of operation. Using XILINX 4000 FPGA circuits for realization of digital filter, a sampling frequency of 400 kHz was obtained

We are searching for the appropriate designs of structures that would allow implementation of online calculation for partial sums of coefficients with programmable gate arrays working at the highest possible speed.

Simultaneously with the development of FIR digital filter structures we’re working on implementation of adaptive algorithms with FPGA circuits. Due to the limited ability for execution of arithmetic operations with FPGA circuits, we have developed structures allowing implementation of required numerical calculations with FPGAs. We would like to emphasize

Electronic Systems Laboratory EL - 11

implementation of a sequence of 16 multipliers linked to a group of 16 sequential adders.

We have used the above described structures to design an adaptive filter with online calculation of the partial sums of coefficients together with LMS algorithm, which is simple enough for realization in FPGA distributed arithmetic. This filter is used for the extraction of a signal from background noise. We have achieved 100 kHz input sampling frequency with this adaptive FIR filter featuring 16 coefficients, 16 bit input-output word and 16 bit internal arithmetic, implemented with XILINX series 4000 FPGA. This filter improved signal to noise ratio for 22 dB.

We are also working on FPGA prototype circuits design for student laboratory practice. Our goal is to attract more students to research work in the field of digital filters.

PRVŠSARG Povečanje robustnosti na vhodni šum v sistemih avtomatskega razpoznavanja govora (Improvement of automatic speech recognition noise robustness)

Leader: Assoc. Prof. Dr. Rudolf Babič Participant: Bojan Jarc, MSc

The purpose of this project is the development of preprocessing methods to improve automatic speech recognition in a noisy environment. Within the scope of this project we are developing methods of noise estimation in speech presence and statistical methods of speech estimation. Efficiency of methods is evaluated with Aurora 2 in Aurora 3 databases. Project is developed according to directives from the European Telecommunications Standard Institute – ETSI for distributed speech recognition over a mobile cellular network.

Within the framework of this project a method of clean speech estimation from noisy speech based upon Gaussian random model was developed and implemented. Also a method of noise spectrum estimation between harmonics of voiced speech was developed and implemented.


Applied project

IOTSEV Izdelava orodij za testiranje simulatorjev električnih vezij (Problem tracking system)

Leader: Assoc. Prof. Dr. Tomaž Dogša Participants: Branko Drevenšek; Matej Šalamon, MSc


EL - 12 Electronic Systems Laboratory

The purpose of this project was to develop software testing tools that would be suitable for verification of electronic circuit simulators. We focused mainly on DC operating points. Our testing tool generates many electrical circuits with random topology and elements and automates test execution and failure detection. We tested different versions of SPICE simulators. With these tools it is possible to compare more objectively the quality of simulators.

PUBLICATIONS

Davorin Osebik, Rudolf Babič, “Možnosti izvedbe adaptivnega FIR sita s programirnimi (FPGA) vezji,” Inf. MIDEM, Vol. 32, No. 3, pp. 157–166, Sept. 2002.

Bojan Jarc, Rudolf Babič, “Izboljšanje natančnosti razpoznavanja govora z določanjem njegove aktivnosti na podlagi statističnega modela,” Electrotechnical Review, Vol. 69, No. 1, pp. 75–81, 2002.

Matej Šalamon, Tomaž Dogša, “Primerjalna analiza kaotičnega šifrirnega sistema s šifrirno funkcijo XOR in z multipomično šifrirno funkcijo,” Electrotechnical Review, Vol. 69, No. 2, pp. 107–112, 2002.

Davorin Osebik, Mitja Solar, Rudolf Babič, “Modul adaptivnega sita za digitalno procesiranje signalov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 45–48.

Matej Šalamon, Tomaž Dogša, “Vpliv parametrov kaotičnega vezja na njegovo vedenje,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 57–60.

Bojan Jarc, Rudolf Babič, “Enhanced second order statistics spectrum estimation method for noise robust speech recognition,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 105–115.

Anton Pleteršek, “HVG – high voltage generation with multistage charge pump,” 38th International Conference on Microelectronics, Devices and Materials and the Workshop on Packaging and Interconnections in Electronics, Lipica, Oct. 2002, pp. 183–188.

Robert Veronik, Zdravko Kačič, Nada Hernja, Milan Brumec, “Nov multimedijsko podprt način učenja pravilne izgovorjave slušno in govorno motenih otrok,” 2. slovenskega posveta o rehabilitaciji oseb s polževim vsadkom, Maribor, Slovenia, Nov. 2002, pp. 117–121.

Electronic Systems Laboratory EL - 13

Nada Hernja, Alenka Werdonig, Irena Furjan-Varžič, Diana Ropert, Sergeja Groegl, Milan Brumec, “Uspešnost pozne implantacije,” 2. slovenskega posveta o rehabilitaciji oseb s polževim vsadkom, Maribor, Slovenia, Nov. 2002, pp. 147–152.

Nada Hernja, Milan Brumec, Sergeja Groegl, Diana Ropert, Barbara Tetičkovič, Alenka Werdonig, “Pot do poslušanja s polževim vsadkom,” Simpozij Naših 40 let, Maribor, Slovenia, June 2002, pp. 90–95.

EL - 14 Microcomputer Systems Laboratory

MICROCOMPUTER SYSTEMS LABORATORY

Head:


Phone: +386 2 220 72 10


RESEARCH PROJECTS



2002–2003-FERI-1 Zagotavljanje povezljivosti MGC in MG po protokolu MGCP (Robust connectivity management of MGC and MG)

Leader: Boštjan Vlaovič Participants: Peter Vicman, Aleksander Vreže, Assoc. Prof. Dr. Zmago Brezočnik Project partner: Iskratel Ltd.

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Iskratel Ltd.

The MGCP (Media Gateway Control Protocol) communication between MGC (Media Gateway Controller) and MG (Media Gateway) was studied. The main objective was to find out how to achieve robust connectivity management that would be able to provide stability even when hardware failure occurs at the local unit or any of the network nodes. The aim of the project is to enable SI2000 V6 to actively participate in the development of the Next Generation Telecommunication Networks.


BITEMA Bilingual Teaching Material for the Deaf by Means of ICT

Leader: Niels Nielsen (Castberggaard) Participants: Bogdan Dugonik, MSc; Asst. Prof. Dr. Matjaž Debevc Project partners: Castberggaard, University of Maribor, Greta Paramedical et Social,

Microcomputer Systems Laboratory EL - 15

Communication Centre for the Deaf and Hard of Hearing


In 2002 we worked on the enhancement of learning tools and learning methods for deaf adults, who have problems when applying for a better job because of their lower level of knowledge or bad qualifications. Some technical, software, and didactical tools have been developed and integrated to enhance the basic knowledge level of deaf people. Some experimental computer programs have been developed, which could help the tutors of hard of hearing people to integrate the learning materials into the Web. The learning materials should contain Video, 3D-animation, Videochat, web-chat, and other elements.



2001-SIPTEL-FERI Razpoznavalnik, konstruktor in krmilni protokol protokolov SIP in SDP za IP telefon (Decoder, Encoder, and Protocol Control for SIP and SDP protocols for IP telephone)

Leader: Boštjan Vlaovič Participants: Peter Vicman, Simon Nedok, Aleksander Vreže, Assoc. Prof. Dr.

Zmago Brezočnik Project partner: Iskratel Ltd.

Financed by: Iskratel Ltd.

Duration: Oct. 2001 to Feb. 2002

In accordance with the 2001-SIPTEL-FERI contract obligations, the following tasks were accomplished: functional specification of the control protocol for SIP, design specification of the control protocol for SIP, transfer of the SIP and SDP parser and constructor to the VxWorks operating system, adaptation of the application programming interface (API) of the control protocol in accordance with the document "Specification of the SIP API", which was the result of joint work with the Iskratel researchers, integration with the IP telephone and basic functionality testing. Annex to the 2001-SIPTEL-FERI contract included work on the program code optimization and official publication of the program modules and the documents on a CD. Special installing instructions and scripts were prepared to ease the use of the package. Additionally, the following documents were prepared: "Testing of SIP stack" and "Testing of SIP and SDP parser and constructor". Therewith, all the tasks planned in the annex of the 2001-SIPTEL-FERI contract were accomplished.


2001-MGCP-FERI Razpoznavalnik in konstruktor protokola MGCP (Decoder and Encoder of MGCP)

Leader: Boštjan Vlaovič Participants: Aleksander Vreže, Peter Vicman, Simon Nedok, Assoc. Prof. Dr.

Zmago Brezočnik Project partner: Iskratel Ltd.

Financed by: Iskratel Ltd.

Duration: Oct. 2001 to June 2002

Work on the contract 2001-MGCP-FERI was completed in the year 2002. All program modules were officially published. Integration with SI2000 system was performed with the cooperation from the Iskratel team members. The following documentation was prepared: "Analysis of MGCP for the needs of the parser and constructor", "Function specification of the parser and constructor for the MGCP", and "Design specification of the parser and constructor for the MGCP".

2002–2003-FERI-2 Program za izvajanje testnih scenarijev po protokolu MGCP (Application for testing MGCP devices)

Leader: Boštjan Vlaovič Participants: Peter Vicman, Aleksander Vreže, Assoc. Prof. Dr. Zmago Brezočnik Project partner: Iskratel Ltd.

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Iskratel Ltd.

Duration: July to Dec. 2002

Specification and realisation of a test application for MGCP (Media Gateway Control Protocol) devices was carried out. MGCP will be one of the key protocols in the Next Generation Networks and SI2000 V6 systems. A proper test environment was constructed and a user level application for compatibility and load tests was provided.


VISIOCOM Video-supported online communities

Leader: Asst. Prof. Dr. Matjaž Debevc Participant: Bogdan Dugonik, MSc


Project partners: Center for Distance Education Development, University of Maribor, Society for Project and Research Work on Internet MIRK, Rehabilitation Technology Centre of Tallinn Technical University (RTC TTU), Hapinet Distance Learning Center


Duration: Apr. 2000 to Oct. 2002

The main goal of the project was to enhance applicability and access to video supported technologies to allow the integration of marginal groups into society and the process of distance education. In 2002 we provided some solutions using new technologies, such as distance education, streaming video on demand, innovative Web videoconferencing solutions and Web-supported collaboration solutions. Integration and usage of the innovative software and technological tools allow disabled people easier access to learning material. A lot of learning material was prepared (in hard copy, multimedia CD (ISBN 86-435-0498-X) and on the Web).

PUBLICATIONS

Tatjana Kapus, “Specification of synchronous sequential circuits using SDL and ObjectGEODE,” Comput. stand. interfaces, Vol. 24, pp. 257–274, 2002.

Filip Samo Balan, Darko Koritnik, Andrej Orgulan, Jože Voršič, “Hitra kalibracija flikermetra za pravilno oceno kakovosti napetosti po EN 50160,” Inf. MIDEM, Vol. 32, No. 2, pp. 111–114, June 2002.

Aleš Časar, Zmago Brezočnik, Tatjana Kapus, “Exploiting symbolic model checking for sensing stuck-at faults in digital circuits,” Inf. MIDEM, Vol. 32, No. 3, pp. 171–180, Sept. 2002.

Boštjan Vlaovič, Zmago Brezočnik, “Analog subscriber call generator,” Electrotechnical Review, Vol. 69, No. 5, pp. 259–265, 2002.

Bogdan Dugonik, “Preprostost je umetnost,” Monitor (Ljubl.), Vol. 12, No. 2, pp. 34, Feb. 2002.

Bogdan Dugonik, “Pro One teče pred tekmeci,” Monitor (Ljubl.), Vol. 12, No. 4, pp. 34–35, Apr. 2002.

Bogdan Dugonik, “Pinnaclova orodja,” Monitor (Ljubl.), Vol. 12, No. 6, pp. 16, June 2002.

Bogdan Dugonik, “Iz analognega v digitalno,” Monitor (Ljubl.), Vol. 12, No. 7/8, pp. 40, July/Aug. 2002.


Bogdan Dugonik, Matjaž Klančar, “Hkrati na kaseto in v internet,” Monitor (Ljubl.), Vol. 12, No. 7/8, pp. 42–43, July/Aug. 2002.

Bogdan Dugonik, “Prehod na digitalno,” Monitor (Ljubl.), Vol. 12, No. 11, pp. 36–37, Nov. 2002.

Bogdan Dugonik, Digitalni sistemi (skripta). Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Bogdan Dugonik, Ivan Gerlič, Matjaž Debevc, Bojana Globačnik, Ivan Kolenko, Viljenka Šavli, Ljiljana Fabris, Branko Badoko, Video podprto učenje na daljavo: učni pripomoček za učitelje, študente in učence pri poučevanju, VISIOCOM. Maribor: University of Maribor, Slovenia 2002.

Peter Vicman, Simon Nedok, Boštjan Vlaovič, Zmago Brezočnik, “SIPIS – SIP Info Service,” IASTED International Conference Applied Informatics, Innsbruck, Austria, Feb. 2002, pp. 122–125.

Tatjana Kapus, “Modelling of agent computations using the temporal logic of actions,” International Conference on Software, Telecommunications and Computer Networks SoftCOM 2002, Split–Dubrovnik, Croatia, Venice–Ancona, Italy, Oct. 2002, pp. 345–349.

Boštjan Vlaovič, Simon Nedok, Peter Vicman, Zmago Brezočnik, “SIP-DSS1 Signalling gateway,” E-generation: technology for business momentum 2002, Cork, pp. 111–120.

Bogdan Dugonik, Zmago Brezočnik, Matjaž Debevc, “Video production for distance education,” 24th International Conference on Information Technology Interfaces ITI 2002, Cavtat, Croatia, June 2002, pp. 141–145.

Aleksander Vreže, Janez Brest, Viljem Žumer, Zmago Brezočnik, “Heterogeni računalniški sistem pri razporejanju ravninskih mnogokotnikov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 23–26.

Bogdan Dugonik, “Obdelava video podatkov za prenos po omrežju internet,” Mednarodna izobraževalna računalniška konferenca MIRK 2002, Piran, Slovenia, May 2002, pp. 251–255.

Filip Samo Balan, Darko Koritnik, Andrej Orgulan, Jože Voršič, “Hitra kalibracija flikmetra za pravilno oceno kakovosti napetosti po EN 50160,” 11. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2002, 7 pp.



Bogdan Dugonik, “Uporaba videotehnologij v izobraževanju na daljavo,” lecture at the symposium 3. Trstenjakovi dnevi, Človek – Tehnika – Izobraževanje, Gornja Radgona, Mar. 16, 2002.

Bogdan Dugonik, “Video supported online communities,“ invited lecture at the seminar in the framework of the Phare Access VISIOCOM project, Tallinn Technical University, Estonia, Apr. 18, 2002.

Bogdan Dugonik, “Workshop about videoconference for deaf and hard of hearing,” lecture at the Videoconference Systems seminar in the framework of VISIOCOM project, Tallinn Technical University, Tallinn, Estonia, Apr. 18, 2002.

Bogdan Dugonik, “Introduction to Internet videoconference collaboration technology,” lecture at the Videoconference Systems seminar in the framework of VISIOCOM project, Tallinn Technical University, Tallinn, Estonia, Apr. 18, 2002.

Bogdan Dugonik, “Essential steps for video production for multimedia,“ invited lecture at the FH JOANNEUM, Information Design, Graz, Austria, May 6, 2002.

Bogdan Dugonik, “A model for video production for learning on demand approach”, lecture at the 3rd international scientific meeting Informatology and Distance Education, Rogaška Slatina, Slovenia, Dec. 6, 2002.


Assoc. Prof. Dr. Zmago Brezočnik: Programme committee member, 12th workshop on telecommunications: Business telecommunications, Brdo pri Kranju, Slovenia, Jan. 21–22, 2002.

Assoc. Prof. Dr. Zmago Brezočnik: Programme committee member, Teleinfos '02, Ljubljana, Slovenia, Apr. 10–12, 2002.

Boštjan Vlaovič: Co-ordinated organisation and implementation, Teleinfos – Creative workshop for students: Effect of telecommunications and information technologies on education, Ljubljana, Slovenia, Apr. 11, 2002.

Assoc. Prof. Dr. Tatjana Kapus: Member of the IEEE Slovenia Section student


paper contest jury, Eleventh International Electrotechnical and Computer Science Conference, Portorož, Slovenia, Sept. 23–25, 2002.

Assoc. Prof. Dr. Zmago Brezočnik: Programme committee member, 13th workshop on telecommunications: Quality of service, Brdo pri Kranju, Slovenia, Nov. 18–19, 2002.


Assoc. Prof. Dr. Zmago Brezočnik: Working meeting with leaders of Faculty of Electrical Engineering and Faculty of Computer and Information Science, University of Ljubljana, Ljubljana, Slovenia, Jan. 30, 2002.

Assoc. Prof. Dr. Zmago Brezočnik: Working meeting with leaders of Faculty of Electrical Engineering, J. J. Strossmayer University of Osijek, Osijek, Croatia, May 22, 2002.

Assoc. Prof. Dr. Zmago Brezočnik: Member of the commission for the defence of PhD thesis of Oliver Jukić, MSc, in the Department of Telecommunications, Zagreb, Croatia, July 16, 2002.

GUESTS AND VISITORS

Alessandro Fantechi (University of Florence, Department of Systems and Computer Science, Florence, Italy):

Presentation of research activities, scientific collaboration, June 4–5, 2002.

Blago Spajić (School of Professional Higher Education for Electrical Engineering, Varaždin, Croatia):

Working meeting with leaders of the School of Higher Professional Education for Electrical Engineering, June 26, 2002.

Digital Signal Processing Laboratory EL - 21

DIGITAL SIGNAL PROCESSING LABORATORY

Head:

Assoc. Prof. Dr. Zdravko Kačič

Phone: +386 2 220 72 20


RESEARCH PROJECTS



VVIGTO Evaluation of multilingual speech resources and tools

Leader: Prof. Dr. Bogomir Horvat Participants: Assoc. Prof. Dr. Zdravko Kačič; Dr. Mirjam Sepesy Maučec; Matej

Rojc, MSc; Janez Stergar, MSc; Vladimir Hozjan; Andrej Žgank; Tomaž Rotovnik; Bojan Kotnik

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Ministry of External Affairs of Spain

The goal of the project is to gain new knowledge and experiences in the field of multilingual spoken language resources and automatic speech recognition. The focus of the proposed cooperation is the analysis and evaluation of language resources and methods for acoustic–phonetic modelling. This research also includes methods of language modelling based on independent language approach, i.e. statistical language modelling. The experimental work is based on the use of SpeechDat databases for Spanish and Slovenian languages.

INTERFACE-Project IST–1999–10036

Multimodal Analysis/Synthesis System for Human Interaction to Virtual and Augmented Environments

Leader: Assoc. Prof. Dr. Zdravko Kačič


In the last year of the project INTERFACE, an analysis of emotional effect on prosody features in speech signal was made. The research was expanded to the Spanish and French

EL - 22 Digital Signal Processing Laboratory

language. Prosody features that are unaffected by emotion in speech signal are extracted. It was found out that each speaker interprets emotions in their own way. All speakers have some common characteristics in emotion expression. Speakers of same language have some common characteristics. We also continued with research into automatic emotion recognition. We focused on the recognition of “long-term” features with artificial neural networks. Speaker-dependent emotion recognition, language dependent emotion recognition and speaker and language independent emotion recognition were examined. In all cases the emotions were recognised context independently. Speaker dependent emotion recognition has the highest accuracy and speaker and language independent emotion recognition has the lowest accuracy.

Demo application of emotion and gender recogniser from speech signal.

COST Action 278 Spoken Language Interaction in Telecommunication

Leader: Assoc. Prof. Dr. Zdravko Kačič

Financed by: European Union; Ministry of Education, Science and Sport of the Republic of Slovenia

In the year 2002 an analysis of the usage of higher-order cumulant properties in the noise robust speech parameterization was performed. A test on the German subset of Aurora 3 database showed performance improvement with higher-order linear predictive cepstral coefficients (LPCC) against the generally used second-order LPCC extraction procedure. Further improvement was achieved with the usage of Burg’s algorithm in the LPCC


estimation procedure or with the application of the Maximum Entropy (MEM) power spectrum estimation method in the mel-frequency cepstral-coefficient (MFCC) feature extraction procedure. Another contribution was the analysis of methods for convolutive distortion reduction. Previously developed MFCC feature extraction algorithm has been further upgraded with the well-known RASTA processing, which was in our case integrated in logarithmic mel-filterbank domain. Important speech recognition performance improvement has been achieved. We also tried experimenting with a three-pass recognition strategy. For hypothesis generation we used three different speech recognizers (ISIP, Julius, HTK). Morphological bigram language models were used at the first pass. In the case of inflectional languages, they proved to be more successful than word-based language models. At second pass, hypothesis network was restricted with trigram morphological language models. For the third pass we used the ROVER algorithm. The purpose of this algorithm is to reduce recognition error by exploiting differences between recognizers. For comparison, we used different voting methods.

We also developed a new method, which uses a linear combination of frequency voting and language model information to find the best (most suitable) hypothesis. Three-pass strategy in comparison to two-pass strategy has resulted in 3% higher recognition accuracy. In the area of multilingual speech recognition the research of transfer of source multilingual acoustic models to a new language was investigated.

With the inclusion of Italian language the influence of language and language group similarities was investigated. Also the impact of acoustic adaptation on crosslingual speech recognition was researched. The performance of acoustic models build with the combination of fixed and mobile telephone speech database was analysed.

PUBLICATIONS

Janez Kaiser, Bogomir Horvat, Zdravko Kačič, “Overall risk criterion estimation of hidden Markov model parameters,” Speech commun., Vol. 38, No. 3/4, pp. 383–398, Nov. 2002.

Matej Rojc, Zdravko Kačič, Iztok Kramberger, “Hardware implementation of language resources for embedded systems,” Inf. MIDEM, Vol. 32, No. 3, pp. 199–203, Sept. 2002.

Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “Predstavitev učinkovitega postopka za robustno avtomatsko razpoznavanje govora,” Electrotechnical Review, No. 1, Vol. 69, pp. 69–74, 2002.

Tomaž Rotovnik, Bogomir Horvat, Zdravko Kačič, “Analiza uspešnosti razpoznavalnikov ISIP, HTK in Julius pri razpoznavanju tekočega slovenskega govora,” Electrotechnical Review, Vol. 69, No. 5, pp. 253–258, 2002.


Melita Zemljak, Zdravko Kačič, Simon Dobrišek, Jerneja Gros, Peter Weiss, “Računalniški simbolni fonetični zapis slovenskega govora,” Slav. rev., Vol. 50, No. 2, pp. 159–169, Apr.–June 2002.

Zdravko Kačič, “Govorno vodeni informacijski portal,” Škrjanček (Ljubl.), Vol. 35, No. 7/8, pp. 17–19, July–Aug. 2002.

Bojan Kotnik, Damjan Vlaj, Zdravko Kačič, Bogomir Horvat, “Robust MFCC feature extractional algorithm using efficient additive and convolutional noise reduction procedures,” 7th international conference on spoken language processing ICSLP 2002, Denver, USA, spet. 2002, pp. 445–448.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “A comparison of HTK, ISIP and julius in Slovenian large vocabulary continuous speech recognition,” I7th international conference on spoken language processing CSLP 2002, Denver, USA, spet. 2002, pp. 681–684.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Preliminary evaluation of Slovenian mobile database PoliDat,” Third international conference on language resources and evaluation LREC 2002, Las Palmas de Grand Canaria, Spain, May 2002, Vol. 2, pp. 564–568.

Matej Rojc, Zdravko Kačič, Darinka Verdonik, “Design and implementation of the Slovenian phonetic and morphology lexicons for the use in spoken language applications,” Third international conference on language resources and evaluation LREC 2002, Las Palmas de Grand Canaria, Spain, May 2002, Vol. 4, pp. 1296–1300.

Vladimir Hozjan, Zdravko Kačič, “Objective analysis of emotional speech for English and Slovenian interface emotional speech databases,” Third international conference on language resources and evaluation LREC 2002, Las Palmas de Grand Canaria, Spain, May 2002, Vol. 6, pp. 2019–2023.

Vladimir Hozjan, Zdravko Kačič, Asuncion Moreno, Antonio Bonafonte, Albino Nogueiras, “Interface databases: design and collection of a multilingual emotional speech database,” Third international conference on language resources and evaluation LREC 2002, Las Palmas de Grand Canaria, Spain, May 2002, Vol. 6, pp. 2024–2028.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “Large vocabulary speech recognition of Slovenian language using data-driven morphological models,” 5th International Conference Text, speech and dialogue TSD 2002, Brno, Czech Republic, Sept. 2002, pp. 329–332.


Andrej Žgank, Tomaž Rotovnik, Zdravko Kačič, Bogomir Horvat, “Uniform speech recognition platform for evaluation of new algorithms,” 5th International Conference Text, speech and dialogue TSD 2002, Brno, Czech Republic, Sept. 2002, pp. 333–336.

Robert Veronik, Rado Slatinek, Bogomir Horvat, “Multimedia application for teaching and learning telecommunication protocols,” 4th IEEE Region 8 International symposium on Video/image processing and multimedia communications VIPromCom-2002, Zadar, Croatia, June 2002, pp. 31–34.

Darinka Verdonik, Matej Rojc, Zdravko Kačič, Bogomir Horvat, “Zasnova in izgradnja oblikoslovnega in glasovnega slovarja za slovenski knjižni jezik,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 44–48.

Bojan Kotnik, Damjan Vlaj, Zdravko Kačič, “Robustna parametrizacija govora z uporabo postopkov za zmanjšanje vplivov aditivnega in konvolucijskega šuma pri avtomatskem razpoznavanju govora,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 49–52.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Bogomir Horvat, “Jezikovno neodvisno modeliranje pregibnega jezika,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 53–57.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, “Uporaba algoritma ROVER pri prepoznavanju slovenskega govora,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 58–61.

Vladimir Hozjan, Zdravko Kačič, “Primerjava robustnosti metod določanja višine govora za različna šumna okolja in razmerja signal/šum,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 62–66.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Prenos razpoznavalnika govora na nov jezik in vpliv jezikovnih skupin,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 67–71.

Andrej Žgank, Matej Rojc, Bojan Kotnik, Damjan Vlaj, Mirjam Sepesy Maučec, Tomaž Rotovnik, Zdravko Kačič, Aleksandra Zögling Markuš, Bogomir Horvat, “Govorno voden informacijski portal Lentinfo – predhodna analiza rezultatov,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 72–77.

Zdravko Kačič, “Pomen združevanja raziskovalnih potencialov pri preseganju jezikovnih pregrad v okviru jezikovnih tehnologij naslednjih generacij,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. B, pp. 111–115.


Zdravko Kačič, “Development of written language resources for Slovenian language,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002 pp. 53–60.

Bojan Kotnik, “Robust speech recognition based on improved spectral subtraction algorithm,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 73–81.

Damjan Vlaj, “New features of the SFEM,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 133–139.

Mirjam Sepesy Maučec, “Improving a model of Slovenian language by using only a raw text corpus,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 155–163.

Janez Stergar, Vladimir Hozjan, “First attempts in word prominence determination,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 183–190.

Matej Rojc, “Using FST for the representation of Slovenian large scale lexica,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 207–215.

Vladimir Hozjan, Janez Stergar, “Determination of prominence accent of prosodic segmentsin emotional speech,” Advances in speech technology: eighth International Workshop, Maribor, Slovenia, July 2002, pp. 229–235.

Robert Veronik, Zdravko Kačič, Nada Hernja, Milan Brumec, “Nov multimedijsko podprt način učenja pravilne izgovorjave slušno in govorno motenih otrok,” 2. slovenski posvet o rehabilitaciji oseb s polževim vsadkom, Maribor, Slovenia, Nov. 2002, pp. 117–121.


Assoc. Prof. Dr. Zdravko Kačič: Management committee meeting of COST 278 project, Zurich, Switzerland, Feb. 4–5, 2002.

Assoc. Prof. Dr. Zdravko Kačič: Board meeting of Interface project, Lausanne, Switzerland, Feb. 18–19, 2002.

Assoc. Prof. Dr. Zdravko Kačič: Board meeting of Interface project, Barcelona, Spain, May 8, 2002.


Assoc. Prof. Dr. Zdravko Kačič: Visit to the XEROX Research centre Grenoble, Grenoble, France, July 16, 2002.

Assoc. Prof. Dr. Zdravko Kačič: Management committee meeting of COST 278 project, Eindhoven, The Netherlands, Aug. 25–27, 2002.

Assoc. Prof. Dr. Zdravko Kačič: Board meeting of Interface project, Genova, Italy, Oct. 1–2, 2002.

Institute of Power Engineering PE – 1

INSTITUTE OF POWER ENGINEERING

Head:


Phone: +386 2 220 70 40


URL: http://www.me.feri.uni-mb.si/

The research work of the Institute of Power Engineering is divided into three main areas: electromagnetic devices; production, transmission and distribution of electrical energy; and power system control. The research on electromagnetic devices is focused on numerical methods. The research on electrical energy deals mainly with optimisation processes, reliability, and the quality of electric energy. Modernising control of power systems is the subject of the third topic.

The Institute of Power Engineering co-operates with many universities and institutes abroad: University Zagreb – Faculty of Electrical Engineering, Croatia, Technische Universität Graz – IGTE, Austria, Technical University of Budapest – Institute for electric machines, Hungary, Universität Stuttgart – Institut für elektrische Machinen und Antriebsysteme and Institut für Theorie der Elektrotechnik, Germany, University of Wisconsin – Wisconsin Power Electronics Research Center Madison, USA, ETH Zürich – Institute for electric machines, Swiss, National Technical University of Athens, Institute for electrical engineering, Greece, Katholieke Universiteit Leuven – Institute for electric machines and drives, Belgium, University of Johannes Kepler Lienz – Institute for control and drives – Austria, University of Lodz, Institute of Electrotechnical Machines and Transformers – Poland, University Sts. Cyril & Methodius – Faculty of Electrical Engineering Skopje, Macedonia, University J. J. Strossmayer – Osijek, Faculty of Electrical Engineering, Croatia.

PE – 2 Institute of Power Engineering

Electrical Machines

Laboratory Head:


Power Engineering Laboratory

Head: Assoc. Prof. Dr. Jože Voršič

Electromechanical Systems Control

Laboratory Head:

Prof. Dr. Bojan Grčar

Fundamentals and Theory of Electrotechnics

Laboratory Head:

Assoc. Prof. Dr. Igor Tičar

Institute of Power Engineering Head:


Applied Electromagnetics

Laboratoy Head:

Assoc. Prof. Dr. Mladen Trlep

Institute of Power Engineering PE – 3

Electrical Machines Laboratory

Head: Prof. Dr. Ivan Zagradišnik

Employees: Bojan Slemnik, MSc; Matej Gajzer, MSc; Florijan Leskovar, Ing.; Miralem Hadžiselimović, BSc

Power Engineering Laboratory

Head: Assoc. Prof. Dr. Jože Voršič

Employees: Assoc. Prof. Dr. Gorazd Štumberger; Assoc. Prof. Dr. Jože Pihler; Andrej Hanžič MSc; Darko Koritnik, MSc; Janez Ribič, BSc; Marjan Stegne, BSc; Jurček Voh

Electromechanical System Control Laboratory

Head: Prof. Dr. Bojan Grčar

Employees: Prof. Dr. Drago Dolinar; Asst. Prof. Dr. Jožef Ritonja; Dr. Oto Težak; Dr. Boštjan Polajžer; Aleksander Krašovec, BSc; Zlatko Strelec

Fundamentals and Theory of Electrotechnics Laboratory

Head: Assoc. Prof. Dr. Igor Tičar

Employees: Andrej Orgulan, MSc; Peter Kitak, BSc

Applied Electromagnetics Laboratory

Head: Assoc. Prof. Dr. Mladen Trlep

Employees: Assoc. Prof. Dr. Anton Hamler; Dr. Marko Jesenik; Dr. Bojan Štumberger; Viktor Goričan, BSc; Gorazd Hrovat, BSc

PE - 4 Electrical Machines Laboratory

ELECTRICAL MACHINES LABORATORY

Head:


Phone: +386 2 220 70 40


RESEARCH PROJECTS


Applied project

L2-3440 Posebni elektromotorji za sodobne servopogone (Special electrical motors for modern servo drives)

Leader: Assoc. Prof. Dr. Riko Šafarič Participants: Bojan Slemnik, Matej Gajzer, Miralem Hadžiselimovič Project partner: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

The subject of the research in the scope of this project is special synchronous motors with permanent magnets, supplied by frequency converters, which are intended for use in modern servo drives.

In the continuation of the first phase of the project we mainly devoted ourselves to the questions regarding the biggest possible value and the appropriate “shape” of the torque of each single motor. In accordance with that we treated the possible winding types of stators of the proposed motors. We devoted our particular attention to the question of relatively big differences between the costs of the permanent magnetic materials, as well as to the desired speed and the quality of our work.

On the basis of performed analytical work and numerical simulations we proposed the co-financer of this project, the company Indramat elektromotorji from Železniki (Slovenia), member of the Rexroth Bosch Group (Germany), with the proper combination of permanent magnet rotors and suitable stator windings. The mentioned company relies on achievement

Electrical Machines Laboratory PE - 5

of desired static characteristics, as well as the smaller influence of certain higher harmonics on torque ripple – indirectly with diminished heating, which is, in general, one of the biggest problems of the producers of electrical machines.

We conclude, that research we made so far fulfilled the first part of their aim, with that it contributes to one of the key abilities of the company, i.e. to the faster development of cost effective products.

Measurement setup for high-speed servo motors.


4010-312 Tlačno liti rotor kot nadomestitev rotorja z bakreno kratkostično kletko (Aluminium die-casted rotor replacing copper squirrel cage rotor)

Leader: Franc Kosel (Faculty of Mechanical Engineering, University of Ljubljana)

Participants: Prof. Dr. Ivan Zagradišnik, Bojan Slemnik, Miralem Hadžiselimovič, Mirko Petrovčič

Project partner: Rotomatika, d. o. o.

Financed by: Ministry of Economics of the Republic of Slovenia; Rotomatika, d. o. o.

Within the sphere of our activities on the before-competition project we are continuing with our research from last year. The mechanical Faculty of Ljubljana leads this research project. This project deals with the possibility of replacing a copper squirrel cage with aluminium (or their alloy) for pump-driven electrical motors and thus cheaper production and an increase in competitiveness in the area of rotor production. The present copper rotor is additionally protected with a stainless steel cover to protect the copper and stack against the aggressiveness of the medium and is for that reason uncompetitive. Their market position will

PE - 6 Electrical Machines Laboratory

be better with the introduction of new cutting tools for lamination (without packing) and die cast rotors.

The Laboratory for Electrical Machines cooperated for the first time by the defining the optimal dimension of rotor lamination, and the number and shape of the slots (bars) of the squirrel cage rotor. Calculation of the optimal dimensions was done with CAD named MPROAW and a second one named Ansys for numerical magnetic field calculation by FEM. At the conclusion of the project the laboratory takes part in the measurements and final comparison analysis of the existing type of products (copper rotor) and the new samples of the motors.

4010-643 Asinhronski pogonski sistemi (Induction drive systems)

Leader: Robert Žerjal (Iskra Avtoelektrika, d. d.) Participants: Prof. Dr. Ivan Zagradišnik, Miralem Hadžiselimovič, Matej Gajzer,

Iztok Špacapan Project partner: Iskra Avtoelektrika, d. d.

Financed by: Ministry of Economics of the Republic of Slovenia; Iskra Avtoelektrika, d. d.

In the year 2002 we started with a before-competition project Induction drive system (induction motors with electronic control) electric vehicle from 2 to 4.3 kW power. Electronic control is fed by a DC battery 36 to 80 V. The particularity of these three-phase induction motors are very low supply voltage and with those connected problems when producing motor windings i.e. the high number of parallel brunches. In the first year we did an analysis of lamination suppliers with a combination of windings and studied the possibility of using the inserting machines. We made numerical 2D analyses of the magnetic field with the accent on the high order-harmonic components to achieve better efficiency and lower additional losses. For the built-in drive motor for electrical vehicles the lamination stack needs to be shorter because of the limited dimension and mounted electrical brake.

The triangle winding connection was used because of the very low battery supply voltage and that was bad for the drive system stability supplied by ZAPI controller. The special problems are shaft currents caused by the voltage of the loop composed from the shaft, bearing shields and housing. They are the results of the PWM modulation switching frequencies about 1 kHz and they lead to earth currents and finally to circumference flux. Amplitude values 10 to 20 times greater than the supply voltage are achieved using this flux induced voltage in the shaft. These currents can, with time, damage the bearings depending of the currents power respectively shaft voltages (the danger voltages are about 500 mV).

They are and they will be the main research goals oriented in the comparison measurements of the shaft currents and taking steps to reduce them.

Electrical Machines Laboratory PE - 7

PUBLICATIONS

Ivan Zagradišnik, Matej Gajzer, “Vpliv navitja na prostorske harmonske komponente enofaznega motorja z obratovalnim kondenzatorjem,” Electrotechnical Review, Vol. 69, No. 3/4, pp. 175–180, 2002.

Ivan Zagradišnik, Elektromehanski pretvorniki: zapiski predavanj. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Ivan Zagradišnik, Bojan Slemnik, Električni rotacijski stroji: učbenik. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

PE - 8 Power Engineering Laboratory

POWER ENGINEERING LABORATORY

Head:

Assoc. Prof. Dr. Jože Voršič

Phone: +386 2 220 70 50


RESEARCH PROJECTS



NPPIZPS Novi pristopi k preverjanju inštalacij za zaščito pred strelo (New approaches in checking lightning protection instalations)

Leader: Assoc. Prof. Dr. Jože Voršič Participants: Ruslan Borisov, Darko Koritnik, Žiga Hribar Project partners: Moscow Power Engineering Institute, Iskra Zaščite

Financed by: Iskra Zaščite, Ministry of Economics of the Republic of Slovenia

Applied projects

ŠČIT Izdelava programskega paketa za projektiranje prenapetostne zaščite in zaščite pred strelo (Development of software package for projecting overvoltage protection and lightning protection)

Leader: Andrej Pirih (Iskra Zaščite) Participants: Darko Koritnik, Žiga Hribar, Janez Podlipnik Project partner: Iskra Zaščite


Power Engineering Laboratory PE - 9

NSSD Nov sistem srednjenapetostnih daljnovodov (New system of mediumvoltage powerlines)

Leader: Assoc. Prof. Dr. Jože Pihler Participants: Assoc. Prof. Dr. Jože Voršič, Andrej Hanžič, Darko Koritnik, Marjan

Stegne

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; TEHMAR proizvodnja, inženiring in trgovina, d. o. o.

LA-PVOM Lokalna agenda – Program varstva okolja za Maribor (Local agenda – Environmental Protection Programme for Maribor)

Leader: Assoc. Prof. Dr. Jože Voršič Participants: D. Rebolj; M. Bas; Andrej Hanžič; Andrej Orgulan, MSc; Miran

Horvat; Boris Bizjak, MSc; Darko Koritnik; Igor Recer; R. Gostinčar; G. Vizovišek

Financed by: Municipality of Maribor, Institute of Environmental Engineering of Maribor, Tourist Association of Maribor

The project links activities of working groups, responsible for co-ordination of individual areas of environmental protection. The main objectives of our activities are the definition of preferential tasks and strategic guidelines for solving environmental protection problems for local areas. The working groups have full authority to propose new or additional research and analyses when it they are unable to make conclusions. The working groups cover the following areas: water, waste, atmosphere, noise, emissions, municipal green areas, agriculture, industry, tourism, energy policy, IT, environment and health, economy and organisation. Our working group covers energy planning. In the framework of the Programme FERI organises seminars people, responsible for decision making in this field.

L2 Izdelava primerjalne študije o kakovosti električne energije na ravni Evropske unije (Elaboration of Comparative Study on Electrical Power Quality in the European Union)

Leaders: Andrej Orgulan, MSc; Bojan Potočnik Participants: Assoc. Prof. Dr. Jože Voršič; Boris Bizjak, MSc; Assoc. Prof. Dr.

Jože Pihler; Darko Koritnik; Marjan Logar; Andrej Hanžič; Marjan Stegne; Miran Horvat; Mitja Žnidarič

Electrical power has become, according to the definitions of the Slovenian Energy Act, a


tradable commodity, the quality of which should be monitored. The criteria for voltage quality is defined in the SIST EN 50160 standard, while the quality of electrical power sometimes also requires the monitoring of electrical current parameters. The objective of the project is to perform measurements and to elaborate a report on the quality of electrical power in transmission and distribution networks. For the purpose of this project we had to analyse the conditions in the Slovenian transmission network and some previously elaborated studies dealing with similar issues. The minimum set of measurement points has been defined. In the next step the measurement points were selected, individually for each Slovenian region. In the first part of the project the measurements of electrical power quality were performed at the voltage levels 110 kV, 20(10) kV and 400 V. The presentation and the analysis of results are very demanding tasks due to the extent of the measurements – measurements with the duration of one week have to be performed on various locations around the country – and consequently due to the large amount of measurement results, which have to be clear and should not be misleading. The project results will serve as a basis for determination of the measurement points of the future power quality monitoring system in the Slovenian transmission and distribution systems, which calls for well argumented evaluation and presentation of the obtained results.


PMJ Prenova mestnega jedra (Urban Renovation of the Historic City Centre)

Leader: Igor Recer (IGRE, d. o. o.) Participants: Assoc. Prof. Dr. Jože Voršič; Andrej Hanžič; Andrej Orgulan, MSc;

Marjan Stegne; Jurček Voh Project partners: IGRE, d. o. o.; Institute of Environmental Engineering of Maribor;

OEGA Consult, d. o. o.; SI Consult, d. o. o.; Inštitut za gospodarsko pravo Maribor; The International Institute for Advanced Studies in Systems Research and Cybernetics

Financed by: Municipality of Maribor

Twenty years ago a ten-year Programme of Renovation for Maribor's Historic City Centre was adopted. The Programme was financed from the system source at the then Self-Management Housing Community. The implementation of this Programme was considered successful and was also presented to the Professional public in Slovenia and abroad. In recent years some new problems have emerged, which impede successful renovation of the city centre. The ownership structure has changed and it is impossible to restore the source of financing. It will be necessary to set new objectives for renovation and find financial sources, which will be the primary task of this project. The basic target of the project is to revitalise the historic city centre commercially and culturally. The Project Consortium has an intention to provide the


city of Maribor, through Professionally executed renovation, a higher degree of tourist recognisability and enable marketing of the historic city centre as a trademark.

Industrial project

SPVNJV Sprejemljivostni preskus varovalk po normativih za jedrsko varnost (Acceptance test for fuses according to nuclear safety normatives)

Leader: Assoc. Prof. Dr. Jože Voršič Participants: Assoc. Prof. Dr. Jože Pihler, Darko Koritnik, Marjan Stegne Project partners: Jedrska elektrarna Krško, Faculty of Business and Economics

Maribor

Financed by: Jedrska elektrarna Krško


Slo–A19/2002 Virtual Electromagnetic Laboratory and Web-based Distance Learning

Leader: Assoc. Prof. Dr. Igor Tičar Participants: Assoc. Prof. Dr. Jože Pihler; Assoc. Prof. Dr. Anton Hamler; Andrej

Orgulan, MSc; Mitja Žnidarič; Prof. Dr. Kurt Preis; Prof. Dr. Oscar Biro

Project partner: Institut für Grundlagen und Theorie der Elektrotechnik


The project will intensify the successful co-operation between Laboratory of Applicative Electrical Engineering of FERI and Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) of TU Graz. Both institutions have successfully co-operated for many years in the field of numerical solving electromagnetic field problems, which is evident from several commonly published papers. This co-operation has been in the last couple of years especially intensive and successful in the field of computer supported educational programmes for the subjects Principles of Electrical Engineering and Theoretical Electrical Engineering. The solving of applicative problems for industry using previously developed program tools has also been very successful. Further upgrading of existing, and the design of new program tools will include development of new pre-processors for planar and rotationally symmetrical electromagnetic problems, pre-processors for planar problems in polar co-ordinates for


electric machines, two and three dimensional program packages EleFAnT2D and EleFAnT3D. In addition to this, some examples of a virtual electromagnetic laboratory will be developed to improve practical exercises for the subject Principles of Electrical Engineering. Procedures of computer animation of electromagnetic phenomena will also be developed. The institutes at TU Budapest and TU Stuttgart are also included in this co-operation. The Austrian partner also co-operates with the University of Bath (UK) and University of Genoa (I) in the EU project Teleteaching and distance education and in INCO COPERNICUS project P.nr. 15CT960703.

CRP-KS 985-05/01 (V1-0480-01)

Research supporting the implementation of Kyoto Protocol – Target oriented research programme “Competitiveness of Slovenia 2001–2006”

Leader: Miha Tomšič (Institut "Jozef Stefan") Participants: Assoc. Prof. Dr. Jože Voršič, Andrej Hanžič, Assoc. Prof. Dr. Jože

Pihler, Miran Horvat, Jurček Voh, Janez Ribič Project partner: Radenska, d. d.

Financed by: Ministry of Environment and Physical Planning of the Republic of Slovenia; Ministry of Education, Science and Sport of the Republic of Slovenia

The Slovenian Government adopted in November 2000 the Strategy and Short-Term Action Plan for Greenhouse Gases Emission Reduction. The Strategy defines targets, basic principles of emission reduction and a set of possible measures. The next steps and milestones of policy for prevention of climate changes (in accordance with the National Programme of Environmental Protection, Official Gazette of RS, no. 8/99) will be elaboration of the National Programme for Greenhouse Gases Emission Reduction, implementation of measurement and monitoring of their effects, and elaboration of national reports by the year 2002. The National Programme for Greenhouse Gases Emission Reduction will quantitatively define targets for each sector and provide detailed specification of measurements. Financial evaluation of the entire programme will also be included in the National Programme. The core activity of the research work in the framework of this project is preparation of a methodology proposal for distribution of the emission reduction burden among the sectors. A tool for quantitative evaluation and analysis of potential national Kyoto strategies for Slovenia, and evaluation of individual sector strategies and instruments, will be developed on the basis of the upgrading and integration of existing computer models. An analysis of the worldwide development of new flexible Kyoto mechanisms and tools for the quantitative evaluation of the effects of their implementation will be the basis for the elaboration methodology proposal for implementation of these mechanisms in Slovenia. The expected project results will be an important Professional support for operative preparation of the National Programme for Greenhouse Gases Emission Reduction. The project team will prepare a survey of various sector approaches and implemented mechanisms for the distribution of emission reduction


burdens among sectors for selected EU countries. An analysis of the anticipated development of common EU policy in this field will also be made. This will serve as a basis for the proposal of methodology and mechanisms for distribution of greenhouse emission burdens among the sectors in Slovenia.

SLO–BiH 9/ 2002-2003

Analysis of asymmetries in medium voltage networks

Leaders: Assoc. Prof. Dr. Jože Voršič, Enver Dolamić (Faculty of Electrical Engineering, University of Tuzla)

Participants: Miran Horvat, Jurček Voh, Prof. Emeritus Dr. Dali Đonlagić, Izudin Kapetanović, Nadil Berbić, Rizah Memišević, Nermin Sarajlić, Branko Fošnjar, Anton Kotnik, Jože Krk, Rafo Jozić, Nehrudin Džambić, Mehmed Šahbazović

Project partners: Ministry of Economics of the Republic of Slovenia, Rudnik ugljena Breza, Rudnik ugljena Banovići



Applied projects

EBMOM2001 Energijska bilanca Mestne občine Maribor za leto 2001 ter izračun emisij škodljivih snovi (Energy Balance in the Municipality of Maribor for 2001 and computation of emissions)

Leader: Assoc. Prof. Dr. Jože Voršič Participants: Andrej Hanžič; Andrej Orgulan, MSc; Miran Horvat; M. Dornik; G.

Černe



“Energy Balance in the Municipality of Maribor” is the basic document on the final energy consumption by individual kinds of energy, and quantities of primary energy, necessary for satisfying the energy requirements of the Municipality. The final energy consumption will serve as a basis for estimating the emissions of harmful substances. In addition to the energy balance for 2001, an estimation of greenhouse gas emissions from sectors of industry, traffic, energy consumption and energy transformation was also made for the same year. The Energy Balance has been made in accordance with the EUROSTAT methodology, which is,


starting from this year, also the official methodology for the Energy Balance of the Republic of Slovenia. Thus the comparability of the Energy Balance in the Municipality of Maribor with the Energy Balance of the Republic of Slovenia is ensured.

ISPZPUSPO Izdelava smernic za projektiranje zaščite pred udarom strele v prehodnem obdobju (Making of guidelines for planning lightning protection in transition period)

Leader: Assoc. Prof. Dr. Jože Voršič Participants: Darko Koritnik, Janez Podlipnik

Duration: Jan. to Dec. 2002


PPUNSPZPS Prikaz praktične uporabe novih standardov na področju zaščite pred strelo (Practical usage of new standards in the field of lightning protection)

Leader: Darko Koritnik Participants: Assoc. Prof. Dr. Jože Voršič, Janez Podlipnik

Duration: Nov. to Dec. 2002

LPVT Laboratorij za preskuse z velikimi tokovi (Laboratory for high current tests)

Leader: Andrej Pirih (Iskra Zaščite) Participants: Assoc. Prof. Dr. Jože Voršič; Assoc. Prof. Dr. Jože Pihler; Prof. Dr.

Vitodrag Kumperščak; Prof. Emeritus Dr. Franc Brešar; Andrej Orgulan, MSc; Boris Bizjak, MSc; Miran Horvat; Mitja Žnidarič; Ladislav Mikola, MSc; Darko Koritnik; Andrej Hanžič; Marjan Stegne; Jurček Voh

Financed by: Ministry of Economics of the Republic of Slovenia, Iskra Zaščite


Iskra Zaščite Ljubljana and FERI Maribor have started planning a new project, i.e. building a new laboratory for certification and accreditation. The laboratory will have two measurement locations that will satisfy all the needs of Slovenian industry and research institutes for high


current tests and measurements. In Ljubljana a laboratory for tests using a surge current generator is under construction, while the ICEM laboratory in Maribor is equipped for tests with high DC and sinusoidal AC currents. Both laboratories are very specific electrical power consumers, and are potential sources of disturbances in the electrical power system and in their neighbourhoods. The research & development phase of the project includes: impact of measurements and tests on neighbouring facilities, simulation of disturbances and impacts on electrical power systems, designing the earthing system, research of practical solutions regarding the laboratory set-up and possible tests, design of measurements for preparation of propagation of disturbances into the neighbourhood, impact of laboratories on the environment, planning and preparation of project of measurement procedures automation, and development of adequate software.

Industrial projects

UMPMP3 Usposobitev močnostne proge MP3 (Setting up MP3 power line)

Leader: Assoc. Prof. Dr. Jože Pihler Participants: Assoc. Prof. Dr. Jože Voršič, Darko Koritnik, Marjan Stegne, Mitja

Koprivšek, Franc Pikl, Žiga Hribar Project partners: Iskra Zaščite; Iskra Stikala, d. d.

Duration: Oct. 2001 to Mar. 2002

IŠIIVPTKPPEE Izdelava študije o izboljšanju izkoristka ob vključitvi parne turbine v kombiniran postroj za proizvodnjo električne energije (Study on improving efficiency with including steam turbine into combined unit for production of electric energy)

Leader: Assoc. Prof. Dr. Jože Voršič Participants: Assoc. Prof. Dr. Jože Pihler, Andrej Hanžič

Financed by: TE Brestanica, d. o. o.

Duration: Apr. to Nov. 2002

TMIPQA Testiranje merilnega instrumenta Power Quality Analyser (Testing of Power Quality Analyser measuring equipment)

Leader: Darko Koritnik Participants: Assoc. Prof. Dr. Jože Voršič, Assoc. Prof. Dr. Jože Pihler, Marjan

Stegne


Project partner: Metrel, d. o. o.

Financed by: Metrel, d. o. o.

Duration: Nov. 2001 to Feb. 2002

MODNTPPEM Meritve obremenilnih diagramov napajalnih transformatorskih postaj na področju Elektra Maribor (Load diagram measurements of supply transformation stations in Elektro Maribor area.)

Leader: Darko Koritnik Participants: Assoc. Prof. Dr. Jože Pihler, Marjan Stegne Project partner: Elektro Maribor, d. o. o.

Financed by: Elektro Maribor, d. o. o.

Duration: Sept. to Dec. 2002

IPISE Izobraževanje projektantov in izvajalcev strelovodnih inštalacij (Education of planers and electricians for lightning installations)

Leader: Darko Koritnik Participants: Assoc. Prof. Dr. Jože Voršič, Janez Podlipnik



PUBLICATIONS

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, Aleksandar M. Stanković, “Control-based reduction of pulsating torque for PMAC machines,” IEEE trans. energy convers., Vol. 17, No. 2, pp. 169–175, 2002.

Zoran Ren, Srečko Glodež, Gorazd Fajdiga, Miran Ulbin, “Surface initiated crack growth simulation in moving lubricated contact,” Theor. appl. fract. mech., Vol. 38, No. 2, pp. 141–149, Sept.–Oct. 2002.

Igor Tičar, Peter Kitak, Jože Pihler, “Načrtovanje novih srednjenapetostnih indikatorjev napetosti s pomočjo izračuna električnega polja,” Inf. MIDEM, Vol. 32, No. 2, pp. 82–87, June 2002.



Benjamin Erjavec, Jože Pihler, Mladen Trlep, “Načrtovanje zaščitnih iskril visokonapetostnih kompozitnih izolatorjev s pomočjo izračuna električnega polja,” Electrotechnical Review, Vol. 69, No. 5, pp. 273–278, 2002.

Matjaž Šraml, Jože Flašker, Iztok Potrč, Miran Ulbin, “Numerical analysis of contact fatigue initiation,” Inž. mech., Vol. 9, No. 4, pp. 239–248, 2002.

Srečko Glodež, Jože Flašker, Miran Ulbin, J. Peter, “Numerical simulation of surface pitting of gears,” Gép, Évf. 53, szám 6/7, pp. 23–27, 2002.

Rolf Lindgren, C. Ó. Luain, N. Bell, C. Alonso, Aksel Sorensen, E. Collins, E. Dragan, C. Fitzgerald, Y. Kubota, K. Fukami, Franc Jakl, T. Lartigau, R. Lindgren, H. Lugschitz, A. Veldhuisen, M. Weibel, I. Fair, D. Il Lee, A. Ruffier, “LCA of overhead lines in Scandinavia,” Electra, No. 202, pp. 50–61, June 2002.

R. Stephen, D. Douglas, M. Gaudry, H. Argasinska, K. Bakic, S. Hoffman, J. Iglesias, Franc Jakl, J. Katoh, T. Kikuta, R. Kimata, T. Kumeda, S. Hodgkinson, G. Mirosevic, Y. Motlis, D. Muftic, Y. Ojala, M Olofsson, T. O. Seppa, R. Thrash, S. Ueda, L. Varga, “Thermal behaviour of overhead conductors,” Electra, No. 488, pp. 71, 73 (eng.); 70, 72 (fra.), Aug. 2002.

Franc Jakl, Andrej Jakl, “Heating of overhead conductors and OPGW cables under non-stationary conditions,” Bosan. herceg. elektroteh., Vol. 4, pp. 30–37, Jan./Dec. 2001.

Miran Ulbin, Srečko Glodež, Zoran Ren, J. Peter, “Crack propagation simulation by strain energy densitymethod,” Gép, Évf. 53, szám 8/9, pp. 32–37, 2002.

Andrej Hanžič, “Kako izbrati energetsko varčne naprave?,” Energ. gospod. ekol. Slov., Vol. 6, No. 1, pp. 22–23, Jan.–Mar. 2002.

Andrej Hanžič, “Strategija proizvodnje električne energije iz obnovljenih virov energije v EU,” Energ. gospod. ekol. Slov., Vol. 6, No. 1, pp. 92–95, Jan.–Mar. 2002.

Andrej Hanžič, Miran Horvat, Gorazd Škerbinek, Jože Voršič, “Možnosti izpolnjevanja zahtev Kiotskega protokola z umeščanjem razpršene proizvodnje v energetski sistem (I. del),” Energ. gospod. ekol. Slov., Vol. 6, No. 3, pp. 46–49, June–Aug. 2002.

Andrej Hanžič, Jože Voršič, “Gorivne celice - pogonsko sredstvo prihodnosti,” Učin. energ., Vol. 7, No. 4, pp. 5, Dec. 2002.


R. Stephen, D. Douglas, M. Gaudry, H. Argasinska, K. Bakic, S. Hoffman, J. Iglesias, Franc Jakl, J. Katoh, T. Kikuta, R. Kimata, T. Kumeda, S. Hodgkinson, G. Mirosevic, Y. Motlis, D. Muftic, Y. Ojala, M Olofsson, T. O. Seppa, R. Thrash, S. Ueda, L. Varga: Thermal behaviour of overhead conductors. Pariz: Cigré 2002.

Drago Dolinar, Gorazd Štumberger, Modeliranje in vodenje elektromehanskih sistemov. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Karl Gotlih, Tomaž Vuherer, Praktikum Konfekcijski stroji. Maribor, Slovenia: Faculty of Mechanical Engineering 2002.

Franc Jakl, Krešimir Bakić, Povečanje izkoriščenosti daljnovodnih naprav z uvedbo nadzora termične obremenljivosti. Ljubljana, Slovenia: Cigré 2002.

Jože Pihler, Dimitrij Kos, Darko Koritnik, Laboratorijske vaje iz visokonapetostne tehnike. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Zoran Ren, Miran Ulbin, MKE praktikum za NASTRAN: navodila za vaje. Maribor, Slovenia: Faculty of Mechanical Engineering 2002.

Samo Ulaga, Mitja Kastrevc, Navodilo za uporabo programskega paketa Falco. Maribor, Slovenia: Faculty of Mechanical Engineering 2002.

Drago Dolinar, Gorazd Štumberger, Miro Milanovič, “Tracking improvement of LSRM at low speed operation,” 15th International conference on electrical machines ICEM 2002, Brugge, Belgium, Aug. 2002, 6 pp.

Boštjan Polajžer, Gorazd Štumberger, Drago Dolinar, Kay Hameyer, “Design of a radial active magnetic bearing,” XVII symposium Electromagnetic phenoma in nonlinearcircuits, Leuven, Belgium, July 2002, pp. 55–58.

Oto Težak, Gorazd Štumberger, Boštjan Polajžer, Drago Dolinar, “Advanced methods in surface approximation,” 14th International conference on Systems reserch, informatics and cybernetics, Baden-Baden, Germany, Aug. 2002, Vol. XI, pp. 20–24.

Igor Tičar, Jože Pihler, Jože Voršič, Peter Kitak, Oszkár Biró, Kurt Preis, “Design of new insulator with capacity divider using 3D electric field calculation,” 10th International IGTE symposium on numerical fields calculation in electrical engineering, Graz, Austria, Sept. 2002, pp. 141–146.

Miro Žunec, Franc Jakl, Igor Tičar, Kurt Preis, Oszkar Biró, “Temperature investigation at a multilayer ACSR 490/65 conductor and OPGW cable with electromagnetic field analysis tools–


ELEFANT 2D,” 10th International IGTE symposium on numerical fields calculation in electrical engineering, Graz, Austria, Sept. 2002, pp. 490–495.

Franc Jakl, Miro Žunec, Igor Tičar, Ivo Uglešić, “Distribution of current density in layers of overhead bare conductors,” International conference on power systems and communication systems infrastructures for the future CRIS 2002, Beijing, China, Sept. 2002, 4 pp.

Boštjan Zafošnik, Zoran Ren, Miran Ulbin, Jože Flašker, “Evaluation of stress intensity factors using finite elements,” FENET technology workshop, Trieste, Italy, Sept. 2002, 10 pp.

Igor Tičar, Jože Pihler, Jože Voršič, Jurij Krope, “Voltage presence indicating system for medium voltage switchgear,” 6th WSEAS International Multiconference on Circuits, Systems, Communications and Computers CSCC 2002, Rethymno, Greece, July 2002, pp. 6631–6636.

Miran Ulbin, Zoran Ren, Boštjan Zafošnik, “Application of the SED criterion for simulation of mixed-mode crack propagation in CTS specimen,” International symposium of multiscaling in mechanics, Messini, Greece, sapt. 2002, pp. 196–202.

Franc Jakl, Miro Žunec, Andrej Jakl, Marjan Krašna, “Adiabatic heating of bare conductors of overhead transmission lines with consideration of temperature dependent physical magnitudes,” 10th international symposium on short-circuit currents in power systems, Lodz, Poland, Oct. 2002.

Boštjan Polajžer, Drago Dolinar, Gorazd Štumberger, Oto Težak, Kay Hameyer, “Analysis of the laboratory implementation of a radial active magnetic bearning,” Electromagnetic fields in electrical engineering ISEF 2001 (Studies in applied electromegnetics and mechanics), Krakov, Poland, Vol. 22, pp. 502–507.

Franc Jakl, Miro Žunec, Igor Tičar, Ivo Uglešić, “Temperature conditions with skin effect impact on current density distribution in ACSR and OPGW cables,” International symposium Modern electric power system MEPS '02, Wrocław, Poland, Sept. 2002, pp. 576–580.

Matjaž Šraml, Iztok Potrč, Miran Ulbin, Janez Stupan, “Computer aided analysis and optimization of the forging process,” Euromech colloquium 430: Formulations and constitutive laws for very large strains, Prague, Czech Republic, Oct. 2001, pp. 53–63.

Karel Gotlih, Karel Jezernik, “The Jacobian matrix for mechanisms with spherical joints,” 11th International Workshop on Robotics in Alpe-Adria-Danube Region RAAD 2002, Balatonfüred, Hungary, July 2002, pp. 171–176.


Drago Dolinar, Gorazd Štumberger, Miro Milanovič, “Improvement of LSRM tracking at low speed operation,” 10th International power electronics and motion control conference EPE-PEMC 2002, Cavtat & Dubrovnik, Croatia, Sept. 2002, 12 pp.

Samo Ulaga, Frančišek Tašner, Aleš Belšak, Jože Flašker, “Maintenance awareness in gear-box design,” 7th International Design Conference DESIGN 2002, Cavtat, Dubrovnik, Croatia, May 2002, pp. 1117–1122.

Boštjan Zafošnik, Miran Ulbin, Jože Flašker, “Numerical analyses of mixed mode crack propagation using virtual crack extension method,” 7th International Design Conference DESIGN 2002, Cavtat, Dubrovnik, Croatia, May 2002, pp. 1279–1284.

Karl Gotlih, “Parameter fitting for a non-linear viscoelastic material model,” 1st International Textile, Clothing & Design Conference ITC&DC 2002, Dubrovnik, Croatia, Oct. 2002, pp. 476–481.

Jože Voršič, Miran Horvat, Gorazd Škerbinek, “Development of embedded generation as an instrument for fulfilling the Kyoto commitments,” 2nd Balkan Power Conference: Power industry restructuring, Belgrade, Yugoslavia, June 2002, pp. 55–60.

Aleksander Kosec, Jože Pihler, Anton Hamler, “Analiza razmer elektromagneta kontaktorja,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 385–388.

Igor Tičar, Jože Pihler, Peter Kitak, “Primerjava in uporabnost 2D in 3D metode za izračun električnega polja po metodi končnih elementov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 405–408.

Jernej Ribič, Viktor Goričan, Anton Hamler, “Izračun rotorskega toka in statičnih karakteristika sinhronskega motorja s kratkostično kletko,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 417–420.

Gorazd Štumberger, Drago Dolinar, “Vpliv trenja in nelinearnosti železnega jedra na trajektorije hitrosti kinematično vodenega linearnega sinhronskega reluktančnega motorja,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 425–428.

Roman Kolenko, Andrej Hanžič, Jože Voršič, “Modeliranje sočasne proizvodnje električne energije in toplote s programskim orodjem GateCycle,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 441–444.


Dejan Skrivalnik, Jože Voršič, “Solarni V-koncentrator za povečanje izhodne moči solarnih modulov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 453–454.

Franc Jakl, “Daljnovodni vodniki novejših tehnologij v luči okoljske problematike,” 2. konferenca o sprejemljivosti energetske infrastrukture v prostoru, Ljubljana, Slovenia, Dec. 2002, pp. 77–87.

Darko Koritnik, Janez Ribič, Jože Voršič, “Ozemljila v temelju - nasprotujoča mnenja izvedencev različnih strok,” 7. mednarodni simpozij "Höflerjevi dnevi", Portorož, Slovenia, Nov. 2002, 8 pp.

Drago Dolinar, Gorazd Štumberger, “High performance tracking of linear synchronous reluctance servodrive,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 182–187.


Igor Čuhalev, Franc Jakl, “Meteorološke meritve v energetiki kot informacija za projektiranje in vodenje procesov,” 11. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2002, 6 pp.

Robert Zadravec, Jože Pihler, Andrej Hanžič, Marjan Stegne, “Preskus novih izolacijskih medijev za SN stikalne naprave,” 11. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2002, 10 pp.

Andrej Hanžič, Miran Horvat, Gorazd Škerbinek, Jože Voršič, “Možnosti izpolnjevanja zahtev Kyotskega protokola z umeščanjem razpršene proizvodnje v energetski sistem,” 11. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2002, pp. 27–43.

Andrej Hanžič, Stane Merše, “Razpršena proizvodnja v tržnih razmerah: priložnost ali ovira za Slovenia,” 11. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2002, pp. 99–108.

Karl Gotlih, “Določitev robnih pogojev za reševanje problema globalnega optimalnega vodenja redundantne odprte kinematične verige,” Kuhljevi dnevi '02, Ribno near Bled, Slovenia, Sept. 2002, pp. 327–334.

Bojan Vohar, Karl Gotlih, Jože Flašker, “Optimiranje pogonskega mehanizma stiskalnice za globoki vlek,” Kuhljevi dnevi '02, Ribno near Bled, Slovenia, Sept. 2002, pp. 335–344.


Jože Voršič, Andrej Orgulan, Martin Burger, “Višje harmonske komponente in njihov vpliv na obremenitve vodnikov,” 23. posvetovanje o močnostni elektrotehniki in sodobnih električnih instalacijah, Kotnikovi dnevi, Radenci, Slovenia, Mar. 2002, pp. 19–30.

Franc Jakl, “Visokonapetostni daljnovodi - energetski mostovi med narodi in kontinenti,” 23. posvetovanje o močnostni elektrotehniki in sodobnih električnih instalacijah, Kotnikovi dnevi, Radenci, Slovenia, Mar. 2002, pp. 105–116.


Andrej Hanžič, “Občina Železniki”, presentation of programme for reducing, Železniki, Slovenia, July 11, 2002.

Andrej Hanžič, “TriCo Graz”, presentation of CRP project, Graz, Austria, Sept. 18, 2002.


Andrej Hanžič: Study Promotion 2002, information day, Varaždin, Croatia, Feb. 28 to Mar. 11, 2002.

Assoc. Prof. Dr. Jože Voršič: 6TH Framework Programme, project meeting participation, Brussels, Belgium, Mar. 9–11, 2002.

Žiga Hribar, Assoc. Prof. Dr. Jože Voršič:

EMC–Dusseldorf, seminar participation, Dusseldorf, Germany, Apr. 3–6, 2002.

Andrej Hanžič, Assoc. Prof. Dr. Jože Voršič:

UBA Umweltbundesamt, formal call, Vienna, Austria, Apr. 25, 2002.

Assoc. Prof. Dr. Jože Voršič: Lectures at summer school at the University of Tuzla, Tuzla, Bosnia and Herzegovina, July 8–12, 2002.

Andrej Hanžič: Visit to ABB Ludvika, Ludvika, Sweden, July 25, 2002.

Assoc. Prof. Dr. Jože Pihler, Assoc. Prof. Dr. Igor Tičar:

Visit to Institut für Grundlagen und Theorie der Elektrotechnik (IGTE), project meeting participation, Graz, Austria, Sept. 1, 2002.


Assoc. Prof. Dr. Jože Pihler: Visit to FCI Furukawa Composite Insulator Institute Budapest, Hungary, formal call, Budapest, Hungary, Oct. 7–10, 2002.

Assoc. Prof. Dr. Jože Pihler, Janez Ribič, Marjan Stegne, Assoc. Prof. Dr. Jože Voršič:

Scientific collaboration in bilateral project, Tuzla, Bosnia and Herzegovina, Oct. 25–26, 2002.

GUESTS AND VISITORS

Nermin Sarajlić (Faculty of Electrical Engineering, University of Tuzla, Tuzla, Bosnia and Herzegovina):

Visit to 11th International Expert Meeting Power Engineering 2002, May 14–16, 2002.


Analysis of asymmetries in medium voltage networks, project meeting participation, June 12–15, 2002.


Visit of participants, Sept. 25–29, 2002.

Prof. Dr. Kurt Preis, Prof. Dr. Oscar Biro (Institut für Grundlagen und Theorie der Elektrotechnik, Graz, Austria):

Development of a new preprocessor for automated network generation for program package EleFAnT2D, Dec. 9–12, 2002.

PE - 24 Electromechanical Systems Control Laboratory

ELECTROMECHANICAL SYSTEMS CONTROL LABORATORY

Head:

Prof. Dr. Bojan Grčar

Phone: +386 2 220 70 71


RESEARCH PROJECTS



Lokalno vodenje in zaščita EES (Local automation and unit protection in power systems)

Leader: Prof. Dr. Bojan Grčar Participants: Prof. Dr. Drago Dolinar, Asst. Prof. Dr. Bojan Štumberger, Asst.

Prof. Dr. Jožef Ritonja, Dr. Oto Težak, Dr. Boštjan Polajžer


In this basic research project dynamic power system modelling, control and unit protection were discussed. We claim that network modelling can be performed equally based on instantaneous state variables or by using dynamic phasor quantities. Analysis tools for the interaction of power system transients with protection operation have been developed. In testing phase there are new protection algorithms based on the analytical signal processing methods applied to the power transformers and transmission lines.

Applied project

Aktivni magnetni ležaji (Active Magnetic Bearings)

Leader: Prof. Dr. Drago Dolinar Participants: Prof. Dr. Bojan Grčar, Assoc. Prof. Dr. Peter Cafuta, Assoc. Prof. Dr.

Electromechanical Systems Control Laboratory PE - 25

Gorazd Štumberger, Asst. Prof. Dr. Jožef Ritonja, Dr. Oto Težak, Dr. Boštjan Polajžer, Kay Hameyer


For an experimental system of active magnetic bearings, developed in cooperation with the KU Leuven, ESAT/ELEN, Professor K. Hameyer and with Slovenian companies, an analysis of the operating conditions was performed. The influence of the magnetic non-linearities and cross coupling effects of radial bearings was evaluated using the dynamic mathematical model. The proposed mathematical model is based on the current and position dependent force and magnetic linkage characteristics, which were determined by the finite element method and by measurements. The obtained results show that the impact of the magnetic non-linearities on the radial forces is negligible, while the magnetic cross coupling effects can vary electro motive forces considerably. Furthermore, the operating conditions of the magnetically suspended shaft were estimated. Resulting from the simulation and experimental results a negligible influence of the gyroscopic effects was established, while a large influence of the shaft unbalance due to the rotor's eccentricity was noticed. The elastic shaft eigen-dynamics was therefore excited at the critical rotational speed. A decentralized control was realized. A cascade connection of the PD and PI controllers, which guarantees a very good closed-loop damping and stiffness of the overall system, was proposed.

System of active magnetic bearings.



LSRM Modeliranje, analiza in vodenje linearnega sinhronskega reluktančnega motorja (LSRM) (Modelling, analysis and control of Linear Synchronous Reluctance Motor (LSRM))

Leader: Prof. Dr. Drago Dolinar Participants: Assoc. Prof. Dr. Gorazd Štumberger, Prof. Dr. Bojan Grčar, Asst.

Prof. Dr. Bojan Štumberger, Kay Hameyer

Financed by: Varstroj, d. d.

The subject was the tracking control design of a Linear Synchronous Reluctance Motor (LSRM) drive. The modified nonlinear dynamic LSRM model with magnetic saturation included is used in the control design and realization to improve the tracking performances at very low speed of motion. The iron core saturation is included in the modified model with the experimentally determined flux linkages given as functions of the direct and the quadrature axis currents. Experimental results show that the proposed input-output linearizing tracking control with the included saturation behaves considerably better than the one without saturation, introducing smaller position and speed errors and better drive stiffness.

Experimental system: Linear synchronous reluctance servodrive.

RR-61-2596 Sistem za vodenje, zaščito in lokalno avtomatizacijo v EES (System for control, protection and local automation in power systems)

Leader: Prof. Dr. Bojan Grčar Participants: Prof. Dr. Drago Dolinar, Asst. Prof. Dr. Bojan Štumberger, Asst.

Prof. Dr. Jožef Ritonja, Dr. Oto Težak, Dr. Boštjan Polajžer

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Iskra SYSEN, d. o. o.


Project considers the practical implementation of different protection and control algorithms. Beside some new concepts of the transformer protection the turn-to-turn faults are the focus of our current research. This fault type represent a great challenge for existing relays since they are unable to recognize turn-to-turn faults in the early developing stage. Based on the great number of measured samples on the laboratory power transformer we hope first to develop appropriate model describing this fault type with sufficient accuracy. Obtained deeper knowledge will be later used to improve sensitivity of the protection algorithms.

Industrial projects

AAPV Analiza ustreznosti enopolnega in tripolnega APV-ja za RTP Melje in RTP Maribor (Analysis of single phase and three phase automatic reclose for RTP Melje and RTP Maribor)

Leader: Prof. Dr. Bojan Grčar Participants: Prof. Dr. Drago Dolinar, Asst. Prof. Dr. Jožef Ritonja

Financed by: ELES Slovenia; Elektro Maribor, d. o. o.

This study discusses the adequateness of single phase and three phase automatic recloses for RTP Melje and RTP Maribor for transmission lines Maribor 2 – Melje 2 considering the actual state and possible growth of the power system in Maribor. The load flow analysis was calculated for evaluation on the impact of the reconfiguration on the 110 kV distribution network and for evaluation of the impact of single phase or three phase automatic reclose on the 110-kV network operation transients for different faults and different network configuration were simulated.

IOCK Izračun obremenitve daljnovodov Cirkovci – Kidričevo (Load flow calculations for transmission lines Cirkovci – Kidričevo)

Leader: Prof. Dr. Bojan Grčar Participants: Prof. Dr. Drago Dolinar, Asst. Prof. Dr. Jožef Ritonja

Financed by: ELES Slovenia

The project aim was evaluation of the impact of various factors on the transmission lines Cirkovci – Kidričevo load flow. The impacts of the following factors were analysed: change of energy consumption in a factory in Kidričevo, fault on transmission lines Cirkovci – Kidričevo, change of energy generation in the Formin power plant and expected growth of energy consumption in Slovenia.


PUBLICATIONS


Adolf Žižek, Oto Težak, Štefan Čelan, “Failure prediction model,” Inf. MIDEM, Vol. 32, No. 1, pp. 22–32, Mar. 2002.

Boštjan Polajžer, Drago Dolinar, Gorazd Štumberger, Oto Težak, Kay Hameyer, “Analysis of the laboratory implementation of a radial active magnetic bearning,” Electromagnetic fields in electrical engineering (Studies in applied electromagnetics and mechanics) ISEF 2001, Cracow, Poland, Vol. 22, pp. 502–507.

Drago Dolinar, Gorazd Štumberger, Modeliranje in vodenje elektromehanskih sistemov. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Drago Dolinar, Electrical machines modelling and control. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Oto Težak, Gorazd Štumberger, Boštjan Polajžer, Drago Dolinar, “Advanced methods in surface approximation,” Advances in computer cybernetics, selected papers from the 14th International conference on Systems research, informatics and cybernetics, Baden-Baden, Germany, July 2002, Vol. XI, pp. 20–24.

Miro Milanovič, Drago Dolinar, Aleksander Ravnjak, “DC to three-phase inverter based on two-phase to three-phase transformation,” IEEE International symposium on industrial electronics ISIE 2002, L'Aquila, Italy, July 2002, 5 pp.

Boštjan Polajžer, Gorazd Štumberger, Drago Dolinar, Kay Hameyer, “Design of a radial active magnetic bearing,” XVII symposium Electromagnetic phenomena in nonlinear circuits, Leuven, Belgium, July 2002, pp. 55–58.


Boštjan Polajžer, Jožef Ritonja, Drago Dolinar, “Simple adaptive control for active magnetic bearings,” 3rd international seminar on vibrations and acoustic noise of electric machinery, Łódź, Poland, Oct. 2002 pp. 111–114.


Drago Dolinar, Gorazd Štumberger, Miro Milanovič, “Improvement of LSRM tracking at low speed operation,” 10th International power electronics and motion control conference EPE–PEMC 2002, Cavtat & Dubrovnik, Croatia, Sept. 2002, 12 pp.

Gorazd Štumberger, Drago Dolinar, “Vpliv trenja in nelinearnosti železnega jedra na trajektorije hitrosti kinematično vodenega linearnega sinhronskega reluktančnega motorja,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 425–428.

Aleksander Krašovec, Bojan Grčar, “Turn-to-turn fault in single-phase power transformers,” 13th International Conference on Power System Protection – PSP 2002, Bled, Sept. 2002, pp. 83–86.


Drago Dolinar, Gorazd Štumberger, “High performance tracking of linear synchronous reluctance servodrive,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 182–187.


Prof. Dr. Drago Dolinar, Prof. Dr. Bojan Grčar:

Organising committee members and reviewers, 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 3–5, 2002.

PE - 30 Fundamentals and Theory of Electrotechnics Laboratory

FUNDAMENTALS AND THEORY OF ELECTROTECHNICS LABORATORY

Head:

Assoc. Prof. Dr. Igor Tičar

Phone: +386 2 220 71 50


RESEARCH PROJECTS



Slo–A19/2002 Virtual Electromagnetic Laboratory and Web-based Distance Learning

Leader: Assoc. Prof. Dr. Igor Tičar Participants: Assoc. Prof. Dr. Jože Pihler; Assoc. Prof. Dr. Anton Hamler; Andrej

Orgulan, MSc; Mitja Žnidarič; Prof. Dr. Kurt Preis; Prof. Dr. Oscar Biro

Project partner: Institut für Grundlagen und Theorie der Elektrotechnik


The project will intensify the successful co-operation between Laboratory of Applicative Electrical Engineering of FERI and Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) of TU Graz. Both institutions have successfully co-operated for many years in the field of numerical solving electromagnetic field problems, which is evident from several commonly published papers. This co-operation has been in the last couple of years especially intensive and successful in the field of computer supported educational programmes for the subjects Principles of Electrical Engineering and Theoretical Electrical Engineering. The solving of applicative problems for industry using previously developed program tools has also been very successful. Further upgrading of existing, and the design of new program tools will include development of new pre-processors for planar and rotationally symmetrical electromagnetic problems, pre-processors for planar problems in polar co-ordinates for electric machines, two and three dimensional program packages EleFAnT2D and EleFAnT3D. In addition to this, some examples of a virtual electromagnetic laboratory will be

Fundamentals and Theory of Electrotechnics Laboratory PE - 31

developed to improve practical exercises for the subject Principles of Electrical Engineering. Procedures of computer animation of electromagnetic phenomena will also be developed. The institutes at TU Budapest and TU Stuttgart are also included in this co-operation. The Austrian partner also co-operates with the University of Bath (UK) and University of Genoa (I) in the EU project Teleteaching and distance education and in INCO COPERNICUS project P.nr. 15CT960703.

PUBLICATIONS

Igor Tičar, Oszkár Bíró, Kurt Preis, “Vector potential expanded by edge basis functions associated with loops on finite-element facets,” IEEE trans. magn., Vol. 38, No. 2, pp. 437–440, Mar. 2002.

Kurt Preis, Oszkár Biró, Thomas Ebner, Igor Tičar, “An electromagnetic field analyis tool in education,” IEEE trans. magn., Vol. 38, No. 2, pp. 1317–1320, Mar. 2002.

Igor Tičar, Peter Kitak, Jože Pihler, “Načrtovanje novih srednjenapetostnih indikatorjev napetosti s pomočjo izračuna električnega polja,” Inf. MIDEM, Vol. 32, No. 2, pp. 82–87, June 2002.


Jurij Krope, Lucija Črepinšek-Lipuš, Igor Tičar, Darko Goričanec, “A CaCO3 kristályképződés megelőzése mágneses vízkezeléssel,” Magy. épülgép., Vol. 51, No. 5, pp. 27–29, 2002.

Igor Tičar, Martin Zorič, Osnove elektrotehnike. Vol. 1, Elektrostatika in tokovna polja. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Kurt Preis, Oszkar Bíró, Peter Supancic, Igor Tičar, “FEM simulation of thermistors including dielectric effects,” The tenth biennal IEEE conference on electromagnetic field computation, Perugia, Italy, June 2002, pp. 279.

Oszkar Bíró, Kurt Preis, Klaus Papp, Helmut Reisinger, Igor Tičar, “Validation of the FEM computation of losses in 3D laminated iron structures,” The tenth biennal IEEE conference on electromagnetic field computation, Perugia, Italy, June 2002, pp. 335.

Igor Tičar, Jože Pihler, Jože Voršič, Peter Kitak, Oszkár Biró, Kurt Preis, “Design of new insulator with capacity divider using 3D electric field calculation,” 10th International IGTE

PE - 32 Fundamentals and Theory of Electrotechnics Laboratory

symposium on numerical fields calculation in electrical engineering, Graz, Austria, Sept. 2002, pp. 141–146.

Miro Žunec, Franc Jakl, Igor Tičar, Kurt Preis, Oszkar Biró, “Temperature investigation at a multilayer ACSR 490/65 conductor and OPGW cable with electromagnetic field analysis tools–ELEFANT 2D,” 10th International IGTE symposium on numerical fields calculation in electrical engineering, Graz, Austria, Sept. 2002, pp. 490–495.

Franc Jakl, Miro Žunec, Igor Tičar, Ivo Uglešić, “Distribution of current density in layers of overhead bare conductors,” International conference on power systems and communication systems infrastructures for the future CRIS 2002, Beijing, China, Sept. 2002, 4 pp.

Igor Tičar, Jože Pihler, Jože Voršič, Jurij Krope, “Voltage presence indicating system for medium voltage switchgear,” 6th WSEAS International Multiconference on Circuits, Systems, Communications and Computers CSCC 2002, Rethymno, Greece, July 2002, pp. 6631–6636.

Franc Jakl, Miro Žunec, Igor Tičar, Ivo Uglešić, “Temperature conditions with skin effect impact on current density distribution in ACSR and OPGW cables,” International symposium Modern electric power systems MEPS '02, Wrocław, Poland, Sept. 2002, pp. 576–580.

Peter Kitak, “Konstruiranje oblike kontaktov kompresijskega ločilnega stikala s pomočjo 2D izračuna električnega polja,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 365–368.

Igor Tičar, Jože Pihler, Peter Kitak, “Primerjava in uporabnost 2D in 3D metode za izračun električnega polja po metodi končnih elementov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 405–408.


Jože Voršič, Andrej Orgulan, Martin Burger, “Višje harmonske komponente in njihov vpliv na obremenitve vodnikov,” 23. posvetovanje o močnostni elektrotehniki in sodobnih električnih instalacijah, Kotnikovi dnevi, Radenci, Slovenia, Mar. 2002, pp. 19–30.


Assoc. Prof. Dr. Igor Tičar: Project Slo–A 19 scientific collaboration, Graz, Austria, Jan. 1 to Dec. 31, 2002.

Applied Electromagnetics Laboratory PE - 33

APPLIED ELECTROMAGNETICS LABORATORY

Head:

Assoc. Prof. Dr. Mladen Trlep

Phone: +386 2 220 70 41


RESEARCH PROJECTS



AEPOSS Analiza elektromagnetnega polja v okolici strelovodnih sistemov (Analysis of the electromagnetic field around the lightning conductor systems)

Leader: Assoc. Prof. Dr. Mladen Trlep Participants: Assoc. Prof. Dr. Anton Hamler, Dr. Marko Jesenik, Asst. Prof. Dr.

Bojan Štumberger, Viktor Goričan

Financed by: Applied Electromagnetics Laboratory

The purpose of this project is to analyse the electromagnetic field around the lightening systems. Two research topics are investigated. The first one deals with the mechanism of the lightning spreading in a nonhomogeneous area with nonstationary characteristics. The second one is searching for the methods of an exact calculation of the electromagnetic field, which is the precondition for a quality analysis. In the first project phase the finite element method is chosen, which suits the problem demands, i.e., the calculation accuracy and detailed definition of the space characteristics.

PE - 34 Applied Electromagnetics Laboratory

Electric field at lightning spreading around the lightning conductor system.

Industrial projects

MS32 Izdelava prototipa in osvajanje pilotne proizvodnje stikala MS 32 (Production of prototype and preparing pilot production of the switch MS 32)

Leader: Assoc. Prof. Dr. Anton Hamler Participants: Assoc. Prof. Dr. Mladen Trlep; Boris Bizjak, MSc; Dr. Marko Jesenik;

Asst. Prof. Dr. Bojan Štumberger; Viktor Goričan; G. Hrovat

Financed by: Ministry of Economy; Iskra Stikala, d. d.

Project was related to the development of a technically pretentious motor protection switch,


the production of which will be cheaper than the production of existing less pretentious switches. Analysis of the magnetic, electrical and heating conditions, already done from the basic idea of switch construction, was our job in this project. Because the construction of the type of switch defined is 70% of costs, it bears the main burden of the switch price. The construction has likewise a basic influence on switch efficiency, which can be changed during the development and switch construction only, as in earlier mentioned analysis. Pilot switch production is in the stage of testing.

NMES Numerični modeli elektromagnetnih struktur (Numerical modelling of electromagnetic structures)

Leaders: Assoc. Prof. Dr. Mladen Trlep, Prof. Dr. Andrzej Krawczyk (Electrotechnical Institute)

Participants: Prof. Emeritus Dr. Božidar Hribernik, Assoc. Prof. Dr. Anton Hamler, Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan, S. Sikora, R. Starzynski, J. Sikora, Prof. Dr. S. Wiak

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Polish academy of Sciences

Applications of numerical methods for electromagnetic field analysis in biological tissues together with the development of an inverse approach using the DRM method for use in medical diagnostics was the work covered by this project. New software, which will provide some specific solutions and will be adapted to the existing program solutions, is being developed. The first Slovenian–Polish seminar on the electromagnetism application was conducted during this project.

REMTM Razvoj enosmernega motorja s trajnimi magneti (Development of permanent magnets direct current motor)

Leader: Assoc. Prof. Dr. Anton Hamler Participants: Assoc. Prof. Dr. Mladen Trlep, Dr. Marko Jesenik, Asst. Prof. Dr.


Financed by: BSH Hišni aparati, d. o. o.

This project continues successful previous research which resulted in regular production of a new motor. The aim is to develop an 80 W motor with permanent magnets and with parameters, such as power, rotational torque, operation duration, heating, blocking moment, free run rotations, quantity and types of construction material, suiting the strict tolerance demands. The application purpose severely limits the dimensions of this motor. All these facts required in-depth research of the permanent magnets demagnetisation process in the cases of short circuits and the rotor coil heating. A special attention was focused on a


rectifier-based motor power supply. In this way, a significant performance and motor characteristics improvement was obtained. At the moment, the motor’s prototype is being tested.

OPESMTM Optimizacija polov enofaznega sinhronskega motorja s trajnimi magneti (Optimisation of the poles of a 1 phase synchronous motor with permanent magnets)



Financed by: Iskra MEHANIZMI, d. d.

The aim of this project is to assure the reliable operation of the synchronous motor with permanent magnets in an as big as possible voltage range with an in advance defined rotation direction, which is unreliably defined by that motor. Both demands can be satisfied by the shaping of the stator poles. Automatic optimisation algorithms cannot be used for the shaping of the poles, because the connection between pole shape, rotational torque and operation reliability at different voltages is covered. This is the reason why intuitive shaping procedures were used, which were based on the finite element method magnetic field analysis and on the direct method of torque calculation from magnetic field distribution. The prototype is made and it is in the testing stage. In the range of this project investigations were made and the first prototype of the rotor for synchronous motors with 24 poles made of Ne Fe B magnets was made. To achieve good quality magnetizations of these materials, a large amount of energy is required. A large amount of energy causes big problems at the more pole magnetizations of small dimension magnets.

OTISDM Osvajanje tehnologije izdelave sestavnih delov motorjev iz stiskanih in brizganih mehko in trdomagnetnih kompozitov in njihovo uvajanje v redno proizvodnjo (Development of the technology for the production of the motor components made of pressing and splashing hard and soft magnetic compositions and their introduction in to the production)


Bojan Štumberger, Viktor Goričan Project partners: Iskra MEHANIZMI, d. d.; Inštitut za kovinske materiale in tehnologije



The project has two aims: substitution of the lamellate magnetic circuits made of magnetic sheet metal with powder soft magnetic materials and substitution of the magnets with powder materials of the NeFeB magnets group. In both cases the process of the splashing and pressing will be used. The substitution of the materials will reduce the volume of the used materials, because there is no waste in the case of the use of these technologies, on the other hand the electromotors made of these parts will be more efficient. Mentioned technology will bring big simplification and price reduction in the regular technology. The first samples of the two-pole induction motor were made, and they are in the testing stage. The first results are advantageous, but they indicate the necessity for the change of the shapes of same parts of the magnetic circuit against the shapes of the magnetic circuits in the case of the use of the classics magnetic materials.


Industrial project

WALM Široko uporaben linearni motor (Wide applicable linear motor)



Financed by: Iskra Emeco Kranj, Ideal sistemi


The aim of the cooperation for this project is the production of widely applicable and robust reluctance motors. The shapes of the active motor parts were constructed and an analysis was made of the magnetic and mechanical conditions. More variants of the secondary part of the motor were expected dependant on driving requirements. Prototype was made. The potential areas of usage will be various transport and production systems.

PUBLICATIONS

Viktor Goričan, Anton Habler, Božidar Hribernik, Marko Jesenik, Mladen Trlep, “Measurement set-up for 1-D and 2-D testing of magnetic properties of magnetic steel sheets,” J. Tech. Phys., Vol. 43, No. 4, pp. 405-409, 2002.


Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Eddy current calculation in the circular sample of the two-phase rotational single sheet tester,” J. Tech. Phys., Vol. 43, No. 4, pp. 411-416, 2002.

Janez Rozman, Mladen Trlep, Bojan Zorko, Matjaž Bunc, “Stimulation of nerves innervating the pancreas of a dog,” J. Tech. Phys., Vol. 43, No. 4, pp. 467-473, 2002.

Bojan Štumberger, Anton Hamler, Marko Jesenik, Viktor Goričan, Mladen Trlep, “Flux-weakening and output power capability estimation of interior permanent magnet synchronous motor in variable speed drive application,” J. Tech. Phys., Vol. 43, No. 4, pp. 489-494, 2002.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Enlargement of the rotational field homogenity area in a two-phase round rotational single sheet tester,” Inf. MIDEM, Vol. 32, No. 2, pp. 100–104, June 2002.

Marko Jesenik, Mladen Trlep, Bojan Štumberger, Anton Hamler, “Tranzientni izračun vrtinčnih tokov z metodo končnih elementov,” Electrotechnical Review, Vol. 69, No. 2, pp. 101–106, 2002.

Marko Jesenik, Mladen Trlep, Bojan Štumberger, Anton Hamler, “Izračun magnetnega polja in vrtinčnih tokov v okroglem vzorcu dvo faznega merilca lastnosti magnetne pločevine v vrtilnem magnetnem polju,” Electrotechnical Review, Vol. 69, No. 3/4, pp. 191–197, 2002.

Benjamin Erjavec, Jože Pihler, Mladen Trlep, “Načrtovanje zaščitnih iskril visokonapetostnih kompozitnih izolatorjev s pomočjo izračuna električnega polja,” Electrotechnical Review, Vol. 69, No. 5, pp. 273–278, 2002.

Božidar Hribernik, Anton Hamler, Elektrotehnični materiali, Modul: Kovinski materiali: učbenik. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Anton Hamler, Mladen Trlep, Bojan Štumberger, Marko Jesenik, “Impact of stator pole shape of synchronous motor on torque,” WSEAS International Conference on System Science, Applied Mathematics & Computer Science and Power Engineering Systems, Rio de Janeiro, Brazil, Oct. 2002, pp. 1571–1574.

Viktor Goričan, Marko Jesenik, Anton Hamler, Bojan Štumberger, Mladen Trlep, “Performance of round rotational single sheet tester (RRSST) at higher flux densities in the case of GO materials,” 7th international workshop on 1&2-dimensional magnetic measurement and testing, Lüdenscheid, Germany, Sept. 2002, pp. VI.2.


Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Field homogeneity in 2D R.R.S.S.T. and 2D S.R.S.S.T.,” 10th International IGTE symposium on numerical fields calculation in electrical engineering, Graz, Austria, Sept. 2002, pp. 109.

Olaf Henze, Wolfgang M. Rucker, Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Hysteresis model and examples of ferromagnetic materials,” The tenth biennal IEEE conference on electromagnetic field computation, Perugia, Italy, June 2002, pp. 48.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Field homogeneity in a two-phase rotational single sheet tester with square sample,” The tenth biennal IEEE conference on electromagnetic field computation, Perugia, Italy, June 2002, pp. 135.

Mladen Trlep, Janez Rozman, “The FEM analysis of the peroneal nerve stimulation in hemiplegic patients,” The tenth biennal IEEE conference on electromagnetic field computation, Perugia, Italy, June 2002, pp. 210.

Mladen Trlep, Anton Hamler, Marko Jesenik, Bojan Štumberger, “The FEM-BEM analysis of complex grounding systems,” The tenth biennal IEEE conference on electromagnetic field computation, Perugia, Italy, June 2002, pp. 317.

Anton Hamler, Martin Bizjak, Marko Jesenik, Bojan Štumberger, Mladen Trlep, “Analysis of conditions in circuit breaker,” Electromagnetic fields in electrical engineering ISEF 2001 (Studies in applied electromagnetics and mechanics), Cracow, Poland, Vol. 22, pp. 196–201.

Bojan Štumberger, Viktor Goričan, Anton Hamler, Mladen Trlep, Marko Jesenik, “Comparison of different models for iron core loss calculation in electrical machines,” Electromagnetic fields in electrical engineering ISEF 2001 (Studies in applied electromagnetics and mechanics), Cracow, Poland, Vol. 22, pp. 283–288.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Field homogeneity in a two-phase round rotational single sheet tester with and without the shields,” Electromagnetic fields in electrical engineering ISEF 2001 (Studies in applied electromagnetics and mechanics), Cracow, Poland, Vol. 22, pp. 434–439.

Anton Hamler, Mladen Trlep, Bojan Štumberger, Marko Jesenik, “Pole modelling of synchronous motor with permanent magnet rotor,” 10th international symposium on short-circuit currents in power systems, Lodz, Poland, Oct. 2002, Vol. 1, pp. 143–148.

Bojan Štumberger, Anton Hamler, Mladen Trlep, Marko Jesenik, Viktor Goričan, “Increasing of output power capability in a flux-weakened permanent magnet synchronous motor with a third


harmonic current injection,” VII-th International workshop on optimisation and inverse electromagnetism OIPE 2002, Lodz, Poland, Sept. 2002, pp. 29.

Aleksander Kosec, Jože Pihler, Anton Hamler, “Analiza razmer elektromagneta kontaktorja,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 385–388.

Gorazd Hrovat, Anton Hamler, “Izračun temperaturnega polja motorskega zaščitnega stikala s pomočjo metode končnih elementov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 397–400.

Jernej Ribič, Viktor Goričan, Anton Hamler, “Izračun rotorskega toka in statičnih karakteristik asinhronskega motorja s kratkostično kletko,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 417–420.


Dr. Marko Jesenik, Assoc. Prof. Dr. Mladen Trlep:

Participation at scientific meeting, Perugia, Italy, June 16–19, 2002.

Asst. Prof. Dr. Bojan Štumberger Participation at scientific workshop, Lodz, Poland, Sept. 12–14, 2002.

Viktor Goričan: Participation at scientific workshop, Ludenscheid, Germany, Sept. 16–17, 2002.

GUESTS AND VISITORS

Prof. Dr. Livio Šušnjič (Univetsity of Rijeka, Technical Faculty, Rijeka, Croatia):

Presentation of the laboratory aiming at possible cooperation with the Faculty of Electrical Engineering at Rijeka, June 3–7, 2002.

Prof. Dr. S. Wiak (Institute of Electrical Machines and Transformers, Technical University of Lodz, Lodz, Poland):

Regular meeting in the framework of Slovenian–Polish seminar and preparation of the ISEF 2003 conference, June 22–24, 2002.

Prof. Dr. Andrzej Krawczyk (Electrotechnical Institute, Warsaw,

Regular meeting in the framework of Slovenian–Polish seminar and preparation of the ISEF 2003


Poland): conference, Sept. 25–30, 2002.

Prof. Dr. S. Wiak (Institute of Electrical Machines and Transformer, Technical University of Lodz, Lodz, Poland):

Regular meeting in the framework of Slovenian–Polish seminar and preparation of the ISEF 2003 conference, Sept. 26–27, 2002.

Prof. Dr. Kurt Preis, Prof. Dr. Oscar Biro (Institut für Grundlagen und Theorie der Elektrotechnik, Graz, Austria):

Presentation of the laboratory software and equipment, Dec. 11, 2002.

Institute of Robotics RO – 1

INSTITUTE OF ROBOTICS

Head:


Phone: +386 2 220 73 00


URL: http://www.ro.feri.uni-mb.si

The Institute of Robotics performs basic and applied research for the development and building of robotics systems, production automatization, sensor systems, control theory, modeling, identifications, computer process control, industrial robotics, servo-systems, robot controllers, and real-time control systems. We develop advanced-control algorithms for the control of position, speed, and torque with the use of various kinds of executive modules and constructions of robotic mechanisms.

In the Kinematics and Simulation Laboratory, we conduct robot and robotization kinematics control and process simulation. We use both real and simulated controllers and mechanisms. Simulations deal with virtual and real systems and processes. We also investigate nonlinear and robust control for this reason.

In the Power Electronics Laboratory, we study electronic power devices. We research resonance converters and basic structures of DC/DC converters through modulation procedures.

The Institute of Robotics co-operates with many universities abroad. In the Socrates-Erasmus project we co-operate with Universidade do Minho - Portugal, Technische Universität Braunschweig - Germany, Technische Universität Wien - Austria, Universitat Politechnica de

RO – 2 Institute of Robotics

Catalunya - Spain, Universitat Rovira i Virgili - Spain, Loughborough University - United Kingdom. In CEEPUS program we co-operate with Technical University of Timisoara - Romania, Budapest University of Technology and Economics - Hungary, Cracow University of Technology - Poland, Vienna University of Technology - Austria in Technical University of Košice - Slovak republic.

The institute members are listed below by the laboratory with which they are affiliated.

Power Electronics Laboratory

Head: Assoc. Prof. Dr. Miro Milanović

Industrial Robotics

Laboratory Head:


Kinematics and Simulation Laboratory

Head: Assoc. Prof. Dr. Peter Cafuta

Institute of Robotics Head:


Institute of Robotics RO – 3

Power Electronics Laboratory

Head: Assoc. Prof. Dr. Miro Milanović

Employees: Dr. Franc Mihalič, Dr. Alenka Hren, Anton Otič, BSc

Industrial Robotics Laboratory


Employees: Assoc. Prof. Dr. Riko Šafarič; Asst. Prof. Dr. Martin Terbuc; Dr. Miran Rodič; Asst. Prof. Dr. Suzana Uran; Dr. Dušan Drevenšek; Dr. Aleš Hace; Dr. Andreja Rojko; Janez Pogorelc, MSc; Milan Čurkovič, BSc; Gregor Edelbaher, BSc; Jože Harnik, BSc; Jože Korelič, BSc; Evgen Urlep, BSc

Technological Centre for Mechatronics and Automation (TCMA)


Kinematics and Simulation Laboratory

Head: Assoc. Prof. Dr. Peter Cafuta

Employees: Asst. Prof. Dr. Boris Curk, Marijan Španer, BSc

RO - 4 Power Electronics Laboratory

POWER ELECTRONICS LABORATORY

Head:

Assoc. Prof. Dr. Miro Milanovič

Phone: +386 2 220 73 30


RESEARCH PROJECTS


Applied project

LENEL-01 Trifazni razsmernik, izveden z minimalnim številom elementov (Three-phase Inverter, Minimum Component Topology)

Leader: Assoc. Prof. Dr. Miro Milanovič Participants: Prof. Dr. Karel Jezernik, Asst. Prof. Dr. Franc Mihalič, Dr. Alenka

Hren, Anton Otič

The minimum component three-phase inverter suitable for UPS application is developed. Operation of inverter is based on the use of two-phase to three-phase transformation. For the purposes of better understanding of the operation principle, the transformer, which is the main element of the system, has been supplied by two single-phase inverters. In according to this presumption the theoretical analysis of the proposed system is shown. The theoretical analysis and experimental verification of the proposed principle is presented. In order to get the best knowledge of how the proposed system works the SPICE model of the converter was developed. The simulation results were in good accordance with the experimental results which were measured on the low power of 500 W inverter prototype.

PUBLICATIONS

Dušan Gleich, Peter Planinšič, Bojan Gergič, Žarko Čučej, “Progressive space frequency quantization for SAR data compression,” IEEE trans. geosci. remote sens., Vol. 40, No. 1, pp. 3-10, Jan. 2002.

Power Electronics Laboratory RO - 5

Dušan Gleich, Peter Planinšič, Žarko Čučej, “Context-based image coding using fuzzy logic,” Opt. eng., Vol. 41, No. 11, pp. 2814–2823, Nov. 2002.

Miro Milanovič, Peter Kuzman, “Enofazno trifazni napetostni pretvornik,” Inf. MIDEM, Vol. 32, No. 2, pp. 105–110, June 2002.

Miro Milanovič, Analogna integrirana vezja v industrijski elektroniki. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Peter Planinšič, Dušan Gleich, Žarko Čučej, “The constraint optimisation in subband image coding using fuzzy iterative algorithm,” 3rd WSEAS International Conference on Neural Networks and Applications NNA '02, 3rd WSEAS International Conference on Fuzzy Sets and Fuzzy Systems FSFS '02, 3rd WSEAS International Conference on Evolutionary Computation EC '02, Interlaken, Switzerland, Feb. 2002, pp. 98–103.

Peter Planinšič, Dušan Gleich, Žarko Čučej, “The use of fuzzy image quality measure for embedded wavelet coders,” 9th International Workshop on Systems, Signals and Image Processing, Manchester, Great Britain, Nov. 2002, pp. 256–260.


Dušan Gleich, Peter Planinšič, Žarko Čučej, “Fuzzy coded space frequency quantization,” IEEE international geoscience and remote sensing symposium and the 24th Canadian symposium on remote sensing IGARSS 2002, Toronto, Canada, June 2002, 3 pp.

Miro Milanovič, Drago Dolinar, Aleksander Ravnjak, “DC to three-phase inverter based on two-phase to three-phase transformation,” IEEE International symposium on industrial electronics IEEE–ISIE 2002, L'Aquila, Italy, July 2002, 5 pp.

Miro Milanović, Robert Kovačič, “Control and small-signal modelling of resonant link converter,” 10th International power electronics and motion control conference EPE–PEMC 2002, Cavtat & Dubrovnik, Croatia, Sept. 2002, 12 pp.

Drago Dolinar, Gorazd Štumberger, Miro Milanovič, “Improvement of LSRM tracking at low speed operation,” 10th International power electronics and motion control conference EPE–PEMC 2002, Cavtat & Dubrovnik, Croatia, Sept. 2002, 12 pp.

Dušan Gleich, Peter Planinšič, Žarko Čučej, “Fuzzy coded trellis quantization,” 4th IEEE Region 8 International symposium on Video/image processing and multimedia communications VIPromCom-2002, Zadar, Croatia, June 2002, pp. 49–52.

RO - 6 Power Electronics Laboratory

Robert Kovačič, Miro Milanovič, “Malosignalni model pretvornika z resonančnim povezovalnim krogom,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 61–64.

Miro Milanovič, “Trifazni razsmernik, zasnovan na dvofazno trifazni transformaciji,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 477–480.


Miro Milanovič, “Switching matrix converters,“ seminar at the School of Engineering of Universitat Rovira i Virgili, Tarragona, Spain, Feb. 18–22, 2002.

Anton Otič, “European week of mobility,” presentation and test drive with electric car, Ljubljana, Slovenia, Sept. 19, 2002.


Asst. Prof. Dr. Franc Mihalič, Dr. Alenka Hren:

Organising committee members and reviewers, 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 3–5, 2002.

Assoc. Prof. Dr. Miro Milanovič: Member of the international programme board and reviewer, 10th International Power Electronics and Motion Control Conference, Cavtat & Dubrovnik, Croatia, Sept. 9–11, 2002.

Industrial Robotics Laboratory RO - 7

INDUSTRIAL ROBOTICS LABORATORY

Head:


Phone: +386 2 220 73 00


RESEARCH PROJECTS


Applied project

L2-3440 Posebni elektromotorji za sodobne servopogone (Special electrical motors for modern servo drives)

Leader: Assoc. Prof. Dr. Riko Šafarič Participants: Bojan Slemnik, Matej Gajzer, Miralem Hadžiselimovič Project partner: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

The subject of this research in the scope of this project is special synchronous motors with permanent magnets, supplied by frequency converters, which are intended for use in modern servo drives.

In the continuation of the first phase of the project we mainly devoted ourselves to questions regarding the biggest possible value and the appropriate “shape” of the torque of each single motor. In accordance with this we treated the possible winding types of stators of the proposed motors. We devoted our particular attention to the question of relatively big differences between the costs of the permanent magnetic materials, as well as to the desired speed and the quality of our work.

On the basis of performed analytical work and numerical simulations we proposed to the co-financer of this project, the company Indramat elektromotorji from Železniki (Slovenia), member of the Rexroth Bosch Group (Germany), the proper combination of permanent magnet rotors and suitable stator windings. The mentioned company can rely on achieving

RO - 8 Industrial Robotics Laboratory

the of desired static characteristics, as well as the smaller influence of certain higher harmonics on torque ripple – indirectly with diminished heating, which is, in general, one of the biggest problems for the producers of electrical machines.

We conclude, that the research we have made so far fulfilled the first part of their aim, in that it contributes to one of the key abilities of the company, i.e. to faster development of cost effective products.


Industrial project

R55-3355 Stroj za razrez z vodnim curkom (Waterjet cutting machine)

Leader: Assoc. Prof. Dr. Martin Terbuc Participants: Dr. Miran Rodič, Dr. Aleš Hace, Marijan Španer

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Alpina, d. d.

Duration: Jan. 2000 to June 2002

The goal of this project is a waterjet cutting machine. This machine will introduce a higher level of flexibility in the shoe production process. It will even allow the production of a single particular pair of shoes. The waterjet machine will be included in the shoe production process in the first working phase, which follows after defining the shoes geometry using the CAD system.


UNISTRUCT Novel methods of adaptive control based on simplified uniform structures and learning

Leaders: Prof. Dr. Karel Jezernik, Jozsef K. Tar (Budapest Polytechnic John von Neuman)

Participants: Assoc. Prof. Dr. Martin Terbuc, Assoc. Prof. Dr. Riko Šafarič, Dr. Aleš Hace, Dr. Andreja Rojko, Imre Rudas, Janos F. Bito, Laslo Horvat

Project partner: Budapest Polytechnic John von Neuman




In our paper, distributed for IECON'02, a new family of Symplectic matrices were introduced. As it is demonstrated via simulations made for 3 DOF SCARA arm these transformations have very advantageous properties in use in such control applications. The results made it evident that this new family of symplectic matrices seriously improves the quality of the adaptive control. It needs relatively simpler mathematical operations than the originally used MOST transformations, and also satisfies the near-unity requirement needed for the complete stability of the control. It is expedient to make further investigations for the application of these symplectic transformations.

In another paper, as a paradigm a mechanically 3 DOF SCARA arm of elastic joints actuated by voltage-controlled DC motors was considered. With the deformable joints the problem has 6 mechanical and 3 electrical degrees of freedom together forming a 9 DOF electro-mechanical system. For the controller only the first three mechanical degrees of freedom were modelled. On the basis of simulations it was concluded that the control designed for the 3 DOF mechanical degrees of freedom can efficiently compensate the effect of the unmodelled degrees of freedom and the inaccuracy of the modelled part of the robot. In the future it seems to be expedient to investigate the usefulness of this method for other non-linear systems, e.g. as chemical reactions' control.

PUBLICATIONS

R. M. Parkin, C. A. Czarnecki, Riko Šafarič, D. W. Calkin, “A PID servo control system experiment conducted remotely via Internet,” Mechatronics (Oxf.), Vol. 12, No. 6, pp. 833–843, 2002.

Miran Rodič, Karel Jezernik, “Speed-sensorless sliding-mode torque control of an induction motor,” IEEE trans. ind. electron., Vol. 49, No. 1, pp. 87–95, Feb. 2002.

Asif Šabanović, Karel Jezernik, Nadira Šabanović, “Sliding modes applications in power electronics and electrical drives,” Variable structure systems: towards the 21stcentury (Lecture notes in control and information sciences). Berlin: Springer 2002, pp. 223–251.

Suzana Uran, Riko Šafarič, “Naprava s pnevmatično aktivno površino: Tehnike krmiljenja gibljivih predmetov,” Stroj. vestn., Vol. 48, No. 6, pp. 332–354, 2002.

Suzana Uran, Riko Šafarič, “Naprava s pnevmatično aktivno površino: Tehnike krmiljenja lege togih objektov s povratno zvezo in brez nje,” Stroj. vestn., Vol. 48, No. 5, pp. 267–282, 2002.


Suzana Uran, Riko Šafarič, Tobias Winther, “Naprava s pnevmatično aktivno površino – razvoj prototipa in Ljapunovova analiza stabilnosti,” Stroj. vestn., Vol. 48, No. 4, pp. 218–233, 2002.

Andreja Rojko, Karel Jezernik, “Vodenje robota v drsnem režimu z adaptivno mehko estimacijo dinamike,” Electrotechnical Review, Vol. 69, No. 2, pp. 128–134, 2002.

Riko Šafarič, “Mehatronika – interdisciplinarna študijska smer na Univerzi v Mariboru: mehatronika – kaj je to?,” Svet elektron., Vol. 9, No. 84, pp. 22–28, 2002.

Ivan-Jan Zapečnik, “Mini mobilni robot,” Svet elektron., Vol. 9, pp. 35–37, Sept. 2002.

Matjaž Dolinar, Marko Keber, “Mobilni robot Speedy,” Svet elektron., Vol. 9, pp. 38–41, Sept. 2002.

Sašo Jezernik, Karel Jezernik, Manfred Morari, “Impedance control based gait-pattern adaptation for a robotic rehabilitation device,” 2nd IFAC conference on Mechatronic systems, Berkeley, USA, Dec. 2002, pp. 417–421.

Karel Jezernik, Gregor Edelbaher, Miran Rodič, “Sensorless control of induction motor by estimation of an extended electromotive force,” 28th International conference on industrial electronics, control and instrumentation IECON-2002, Sevilla, Španjia, Nov. 2002, 6 pp.

József K. Tar, A. Bencsik, Janós F. Bitó, Karel Jezernik, “Application of a new family of symplectic transformations in the adaptive control of mechanical systems,” 28th International conference on industrial electronics, control and instrumentation IECON-2002, Sevilla, Spain, Nov. 2002, 6 pp.

Karel Jezernik, Miran Rodič, Asif Šabanović, “Sliding mode application in speed sensorless torque control of an induction motor,” 15th Triennial World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 2002, 6 pp.

Andreja Rojko, Karel Jezernik, “Adaptive fuzzy sliding mode motion control of robot manipulator,” 15th Triennial World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 2002, 6 pp.

Karel Gotlih, Karel Jezernik, “The Jacobian matrix for mechanisms with spherical joints,” 11th International Workshop on Robotics in Alpe-Adria-Danube Region RAAD 2002, Balatonfüred, Hungary, July 2002, pp. 171–176.

Smiljan Šinjur, Riko Šafarič, Borut Žalik, “A JAVA collision detection for a WEB-based robot,” 11th International Workshop on Robotics in Alpe-Adria-Danube Region RAAD 2002, Balatonfüred, Hungary, July 2002, pp. 223–228.


Suzana Uran, Karel Jezernik, “Computed torque method for a ball and beam,” 11th International Workshop on Robotics in Alpe-Adria-Danube Region RAAD 2002, Balatonfüred, Hungary, July 2002, pp. 347–352.

Martin Terbuc, Karel Jezernik, “Education and use of internet,” 3rd International conference Virtual university, Bratislava, Slovakia, Mar. 2002, pp. 15–18.

Karel Jezernik, Gregor Edelbaher, Asif Šabanović, “Sliding mode approach in speed sensorless control of an induction motor,” 10th International power electronics and motion control conference EPE–PEMC 2002, Cavtat & Dubrovnik, Croatia, Sept. 2002, 12 pp.

Miran Rodič, Karel Jezernik, “Torque derivative approach to the direct torque control of induction motor,” 10th International power electronics and motion control conference, Cavtat & Dubrovnik, Croatia, Sept. 2002, 11 pp.

Miran Rodič, Karel Jezernik, “Robust chattering free continuous direct torque and flux sliding mode control of induction motor,” 7th International Workshop on Variable Structure System, Sarajevo, Bosnia and Herzegovina, July 2002, pp. 245–252.

Andreja Rojko, Karel Jezernik, “An adaptive fuzzy sliding-mode controller with application to direct drive robot,” 7th International Workshop on Variable Structure Systems, Sarajevo, Bosnia and Herzegovina, July 2002, pp. 283–290.

Suzana Uran, Karel Jezernik, Riko Šafarič, “Robot impedance control with internal sliding mode based controller,” 7th International Workshop on Variable Structure Systems, Sarajevo, Bosnia and Herzegovina, July 2002, pp. 299–307.

Martin Terbuc, Rok Ostrovršnik, “Uporaba Linux operacijskega sistema za delo v realnem času,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 281–284.

Janez Pogorelc, “Mikrokrmilniški modul za študij vgrajenih sistemov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 399–402.

Damjan Bobek, Igor Hedrih, Rok Klobučar, “Teleoperiranje kamere preko interneta,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 425–426.

Darko Hercog, “Programiranje DSP2 kartice s pomočjo Matlab-Simulink-a,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 433–434.


Aljaž Kapun, Evgen Urlep, “Regulacija položaja vozička na vodilu po metodi izračunanega navora,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 439–440.

Gregor Kramer, Peter Mrak, “Vodenje robota z osebnim računalnikom,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 441–442.

Andrej Plazovnik, Mitja Golenko, Andrej Gjureč, “Štiri-zgibni paralelni manipulator z dvema prostostnima stopnjama,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 447–448.

Smiljan Šinjur, Boštjan Šorgo, “Zaznavanje geometrijskih trkov v simulacijah preko interneta,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 455–456.

Boštjan Šorgo, Smiljan Šinjur, “Razvojno orodje za teleoperiranje robotskega sistema po internetu,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 457–458.

Karel Jezernik, “Speed sensorless torque control of induction motor for EV's,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 236–241.

Miran Rodič, Karel Jezernik, “Continuous approach to the direct torque and flux control of induction motor,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 279–284.

Andreja Rojko, Karel Jezernik, “Sliding-mode motion controller with adaptive fuzzy disturbance estimation,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 300–304.

Suzana Uran, Karel Jezernik, “Control of a ball and beam like mechanism,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 376–380.

Riko Šafarič, Suzana Uran, Tobias K. Winther, “Massive motion control of sub-milimeter objects,” 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 2002, pp. 604–609.



Riko Šafarič, “Development of electronic controlled fuel injection system,“ invited lecture and discussion at the Research and development organisation, Combat vehicle research & development establishment, Avadi, India, Mar. 21–27, 2002.

Milan Čurkovič, Karel Jezernik, Miran Rodič, Gregor Edelbaher, Jože Korelič, Evgen Urlep, “Seminar: Fuzzy control of electrical drives,” seminar for Rudnik Velenje, Velenje, Slovenia, Mar. 25, 2002.

Jože Korelič, Karel Jezernik, “European week of mobility,” presentation and test drive with electric car, Ljubljana, Slovenia, Sept. 19, 2002.

Karel Jezernik, Janez Pogorelc, “8th Slovenian festival of science,” presentation and demonstration drive with mobile robots in labyrinth, Ljubljana, Slovenia, Oct. 15, 2002.

Karel Jezernik, “Sliding mode control of AC-motors,“ lecture at Deutsches Zentrum für Luft- und Raumfahrt, Institut für Robotik und Mechatronik, Weßling, Germany, Oct. 22, 2002.

Janez Pogorelc, “Days of technical education in Slovenia,” presentation of some student projects, Ljubljana, Slovenia, Nov. 26, 2002.


Janez Pogorelc: Organisation of 2nd college and 3rd students national competition on constructing and grand maze driving with mobile robots – RoboT 2002, in cooperation with "Zveza za tehnično kulturo Slovenije", Maribor, Slovenia, May 9, 2002.

Prof. Dr. Karel Jezernik: Programme committee member of 6th International Conference on Automation/Robotics in Theory and Practice, Košice, Slovakia, May 22–24, 2002.

Prof. Dr. Karel Jezernik: Programme committee member of 6th International Conference on Intelligent Engineering Systems, Opatija, Croatia, May 26–29, 2002.

Prof. Dr. Karel Jezernik: Member of international programme board, 11th International Workshop on Robotics in Alpe-Adria-Danube Region, Balatonfuered, Hungary, June 30


to July 2, 2002.

Prof. Dr. Karel Jezernik: Chairman and reviewer for 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 3–5, 2002.

Assoc. Prof. Dr. Martin Terbuc, Dr. Andreja Rojko, Dr. Miran Rodič, Assoc. Prof. Dr. Riko Šafarič, Jože Harnik:

Organising committee members of 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 3–5, 2002.

Prof. Dr. Karel Jezernik: Programme committee member of 3rd International Conference on Information Technology Based Higher Education and Training, Budapest, Hungary, July 4–6, 2002.

Prof. Dr. Karel Jezernik: Organising committee member of 2002 IEEE International Symposium on Industrial Electronics, L'Aquila, Italy, July 8–11, 2002.

Prof. Dr. Karel Jezernik: Chairman, organising committee member and reviewer for 7th International Workshop on Variable Structure Systems, Sarajevo, Bosnia and Herzegovina, July 17–19, 2002.

Prof. Dr. Karel Jezernik: Vice-chairman of 15th Trienal World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 21–26, 2002.

Prof. Dr. Karel Jezernik: Chairman, member of international programme board and reviewer for 10th International Power Electronics and Motion Control Conference, Cavtat & Dubrovnik, Croatia, Sept. 9–11, 2002.

Prof. Dr. Karel Jezernik: Co-organiser of the round table Virtual University, introductory speech and arrangement of 8th Slovenian festival of science, Ljubljana, Slovenia, Oct. 15–17, 2002.

Prof. Dr. Karel Jezernik: Reviewer for IEEE Transactions on Industrial Electronics.


Prof. Dr. Karel Jezernik: Reviewer for IEEE Transactions on Power Electronics.

Prof. Dr. Karel Jezernik: Reviewer for IEEE–ASME Transactions on Mechatronics.

Prof. Dr. Karel Jezernik: Reviewer for Journal of Robotic Systems.

Prof. Dr. Karel Jezernik: Reviewer for IEEE Transactions on Fuzzy Systems.


Assoc. Prof. Dr. Riko Šafarič: Seven days of visit of government off-road military vehicles research and development centre with the aim of development of electronic controlled fuel injection system, Chennai, India, Mar. 21–27, 2002.

GUESTS AND VISITORS

Vojteh Anna (Technical University of Košice, Slovakia):

Exchange of professors in the CEEPUS programme, scientific collaboration, May 10–20, 2002.

Viliam Fedak (Technical University of Košice, Slovakia):

Exchange of professors in the CEEPUS programme, scientific collaboration, June 8 to July 7, 2002.

Jozsef K. Tar (Budapest Polytechnic John von Neuman, Budapest, Hungary):

Bilateral scientific co-operation between Slovenia and Hungary, July 2–6, 2002.

Ferenc Alpek (Budapest University of Technology and Economics, Budapest, Hungary):

Bilateral co-operation between the University of Maribor and Budapest University of Technology and Economics, July 2–6, 2002.

Eugen Pamintas (Technical University of Timisoara, Romania):

Exchange of professors in the CEEPUS programme, scientific collaboration, July 2–12, 2002.



Prof. Dr. Karel Jezernik: Faculty Award for Charing, Organising, and Impelementing the 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, Nov. 21, 2002.

Kinematics and Simulation Laboratory RO - 17

KINEMATICS AND SIMULATION LABORATORY

Head:

Assoc. Prof. Dr. Peter Cafuta

Phone: +386 2 220 73 40


PUBLICATIONS


Marijan Španer, “Kolo z električnim pomožnim pogonom,” ER (Ljubl.), No. 4, pp. 40–42, Dec. 2002.


Marijan Španer, “Kolo z električnim pomožnim pogonom,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 253–256.


Asst. Prof. Dr. Boris Curk: Organising committee member and reviewer for 7th International Workshop on Advanced Motion Control, Maribor, Slovenia, July 3–5, 2002.


Assoc. Prof. Dr. Peter Cafuta: Bilateral co-operation between UM and TUG, Graz, Austria, Aug. 17–18, 2002.

RO - 18 Kinematics and Simulation Laboratory

GUESTS AND VISITORS

Anton Hofer, N. Dourdomas (Graz University of Technology, Graz, Austria):

Cooperation of UM and TUG, development and quality of automatics study programs, Sept. 19, 2002.

Institute of Mathematics and Physics MP – 1

INSTITUTE OF MATHEMATICS AND PHYSICS

Head:


Phone: +386 2 220 73 90


URL: http://www.mp.feri.uni-mb.si

Members of the Institute of Mathematics and Physics are participating in research activities at the Faculty for Electrical Engineering and Computer Sciences and at the Institute for Mathematics, Physics, and Mechanics at the University in Ljubljana. Because our research work is not unilaterally organised, we are reporting on individual contributions.

MP – 2 Institute of Mathematics and Physics

Members of the Institute of Mathematics and Physics are organised into one laboratory.

Applied Mathematics Laboratory

Head: Prof. Dr. Vitodrag Kumperščak

Employees: Assoc. Prof. Dr. Gorazd Lešnjak; Dr. Andrej Duh; Milan Kutnjak, MSc; Dr. Marjan Logar; Asst. Prof. Dr Tatjana Petek; Iztok Peterin, MSc; Jasna Petric, BSc; Aleksandra Tepeh, BSc

Applied Mathematics Laboratory

Head:


Institute of Mathematics and Physics

Head:


Applied Mathematics Laboratory MP - 3

APPLIED MATHEMATICS LABORATORY

Head:


Phone: +386 2 220 73 90


RESEARCH PROJECTS



P0-0508-0101 (B) Algebraične metode v teoriji operatorjev (Algebraic methods in operator theory)

Leader: Matjaž Omladič (Institute for Mathematics, Physics and Mechanics, University of Ljubljana)

Participant: Assoc. Prof. Dr. Gorazd Lešnjak


In this project we plan to study operators defined on real or complex Banach and Hilbert spaces and on Banach lattices as well as linear operators on finite dimensional vector spaces (matrices) over general fields.

P0-0510-0101 (B) Teorija operatorjev (Operator theory)

Leader: Peter Šemrl (Institute for Mathematics, Physics and Mechanics, University of Ljubljana)

Participant: Asst. Prof. Dr. Tatjana Petek


This project is devoted to the study of Jordan homomorphisms, spectral properties (invertibility, spectral radius, quasinilpotents) preservers and comutativity preserving maps. We shall research the related problem of characterizing Lie homomorphisms.

MP - 4 Applied Mathematics Laboratory

Z1-3073-0101-01 Strukturne in algebraične lastnosti razredov grafov (Structural and algebraic properties of graph classes)

Leader: Asst. Prof. Dr. Boštjan Brešar


Graph classes defined either by metric properties, by certain elimination procedures, or as subgraphs of product graphs are studied. The main focus is given to research of the structure of these graphs, as well as to the existence of subgraphs that are invariant under automorphisms or related maps.

PUBLICATIONS

Boštjan Brešar, “The direct expansion of graphs,” Algebraic and topological methods in graph theory (Discrete mathematics), Vol. 244, No. 1–3, pp. 17–30.

Boštjan Brešar, “On the natural imprint function of a graph,” Eur. j. comb., Vol. 23, No. 2, pp. 149–161, 2002.

Boštjan Brešar, Wilfried Imrich, Sandi Klavžar, Henry Martyn Mulder, Riste Škrekovski, “Tiled partial cubes,” J. graph theory, Vol. 40, No. 2, pp. 91–103, 2002.

Boštjan Brešar, Sandi Klavžar, “On partial cubes and graphs with convex intervals,” Comment. Math. Univ. Carolinae, Vol. 43, 3, pp. 537–545, 2002.

Gorazd Lešnjak, “Additive preservers of numerical range,” Linear algebra appl., Vol. 345, pp. 235–253, 2002.

Tatjana Petek, “Spectrum and commutativity preserving mappings on triangular matrices,” Linear algebra appl., Vol. 357, pp. 107–122, 2002.

Tatjana Petek, Peter Šemrl, “Adjacency preserving maps on matrices and operators,” Proc. R. Soc. Edinb., Sect. A, Math., Vol. 132, part 3, pp. 661–684, 2002.

Iztok Peterin, Janez Žerovnik, “Distance in the direct product of graphs,” Prepr. ser. – Univ. Ljubl. Inst. Math., Vol. 40, No. 801, pp. 1–7, 2002.

Sandi Klavžar, Iztok Peterin, “Characterizing subgraphs of Hamming graphs,” Prepr. ser. – Univ. Ljubl. Inst. Math., Vol. 40, No. 825, pp. 1–11, 2002.

Applied Mathematics Laboratory MP - 5

Andrej Duh, Aleš Mohorič, Igor Serša, Janez Stepišnik, “The reduction of the susceptibility effect in diffusion measurements of porous media using a modified PGSE sequence: demonstration by MR micro-imaging,” 6th International Coference on Magnetic Resonance in Porous Media MRPM6, Ulm, Germany, Sept. 2002, pp. P–58.

Milan Kutnjak, “Hilbert boundary value problem and plate bending,” Annual Scientific Conference GAMM 2002, Augsburg, Germany, Mar. 2002, pp. 90.

Boštjan Brešar, “On the natural imprint function of a graph,” 19th LL Seminar on Graph Theory, Vienna, Austria, Apr. 2002, pp. 8.

Janez Stepišnik, Aleš Mohorič, Andrej Duh, “Pulse gradient spin echo measurement of flow dynamics in porous structure: NMR spectral analysis of motional correlations,” NATO Advanced Research Workshop: Magnetic resonance in colloid and interface science, St. Petersburg, Russia, June 2001, pp. 433–444.

Boštjan Brešar, “The imprint function of graphs and Cartesian products,” 4th Cracow Conference on Graph Theory, Czorsztyn, Poland, Sept. 2002, pp. 9.

Sandi Klavžar, Iztok Peterin, “Characterizing subgraphs of Hamming graphs,” 4th Cracow Conference on Graph Theory, Czorsztyn, Poland, Sept. 2002, pp. 30–31.

Andrej Duh, “Obravnava lastne difuzije molekul v porozni snovi z jedrsko magnetno resonanco: analitični opis in merske metode,” 1. simpozij fizikov Univerze v Mariboru, Maribor, Slovenia, Dec. 2002, 1 pp.


Boštjan Brešar, “Generalizations of median graphs: structure and regular graphs,“ lecture at the Montanuniversität Leoben, Institut für Mathematik und Angewandte Geometrie, Abteilung für Angewandte Mathematik, Leoben, Austria, Sept. 2, 2002.

Iztok Peterin, “Induced subgraph of Hamming graphs and flag graphs,” lecture at 19th LL Seminar on Graph Theory, Vienna, Austria, Apr. 25, 2002.

Tatjana Petek, “Mappings Preserving Similarity on B(H),” lecture at 10th ILAS Conference, Auburn, United States, June 10, 2002.

Andrej Duh, “Study of molecular diffusion in a porous medium by NMR: analytical description and methods of measurement,” lecture at 1st Symposium of Physicists at University of Maribor, Maribor, Slovenia, Dec. 19, 2002.

MP - 6 Applied Mathematics Laboratory


Assoc. Prof. Dr. Gorazd Lešnjak: Reviewer for Linear and Multilinear Algebra.

Asst. Prof. Dr. Tatjana Petek: Reviewer for Linear Algebra and Applications.

Institute of Computer Science CS – 1

INSTITUTE OF COMPUTER SCIENCE

Head:

Prof. Dr. Viljem Žumer

Phone: ++386 2 220 74 50


URL: http://www.cs.feri.uni-mb.si/rac/

The Institute of Computer Science has 44 employees, including 4 full professors, 1 associate professor, 5 assistant professors, assistants, researchers, and technical staff. The main activities of the Institute of Computer Science are teaching graduate and postgraduate courses and research work. Research work currently being performed includes the national program group Computer Systems, Methodologies and Cybernetic projects financed by the Ministry of Education, Science and Sport Republic of Slovenia, 2 fundamental research projects, 25 international projects, 11 applied research projects, and 3 industrial projects.

During the past year, the institute has published more than 100 papers, presented a great deal of research work, and in addition, organised meetings, conferences, and visits to other institutions. The main research areas of the institute are: computer graphics, artificial intelligence, computer animation, multimedia, programming languages, computer architecture, medical informatics, software engineering, signal and image processing, and system software.

CS – 2 Institute of Computer Science

Members of the institute are divided into six laboratories and seven centres of technology.

Computer Graphics and Artificial Intelligence

Laboratory Head:

Prof. Dr. Nikola Guid

Computer Architecture and Languages

Laboratory Head:


System Design Laboratory

Head: Prof. Dr. Peter Kokol

System Software Laboratory

Head: Prof. Dr. Damjan Zazula

Institute of Computer Science Head:


Heterogeneous Computer Systems Laboratory

Head: Asst. Prof. Dr. Milan Ojsteršek

Geometric Modelling and Multimedia Algorithms

Laboratory Head:

Assoc. Prof. Dr. Borut Žalik

Institute of Computer Science CS – 3

Computer Graphics and Artificial Intelligence Laboratory

Head: Prof. Dr. Nikola Guid

Employees: Simon Kolmanič, MSc; Damjan Strnad, MSc; Bogdan Lipuš, BSc; Karno Bozi, BSc

Centre for Computer Animation and Multimedia

Head: Prof. Dr. Niko Guid

Computer Architecture and Languages Laboratory


Employees: Asst. Prof. Dr. Marjan Mernik; Asst. Prof. Dr. Janez Brest; Robert Krušec, BSc; Matej Črepinšek, BSc; Tomaž Kosar, BSc; Sašo Greiner, BSc; Damijan Rebernak, BSc; Borko Bošković, BSc

Centre for Programming Languages


System Design Laboratory


Employees: Dr. Špela Hleb - Babič; Asst. Prof. Dr. Milan Zorman; Mitja Lenič, MSc; Petra Povalej, BSc; Alojz Tapajner, BSc

Centre for Medical Informatics


System Software Laboratory


Employees: Dr. Danilo Korže; Dr. Andrej Šoštarič; Dr. Dean Korošec; Asst. Prof. Dr. Božidar Potočnik; Boris Cigale, MSc; Aleš Holobar, BSc; Matjaž Divjak, BSc; Dušan Heric, BSc; Jurij Munda; Daniel Bernard

CS – 4 Institute of Computer Science

Centre for Interactive Network Applications


Centre for Biomedical Signal and Image Processing


Heterogeneous Computer Systems Laboratory


Employees: Aleksander Kvas, MSc; Ervin Schaffranietz, BSc; Branko Horvat, BSc; Borut Gorenjak, BSc; Albin Bregant, BSc; Bojan Letnik, BSc

Centre for Heterogeneous Processing


Laboratory for Geometric Modelling and Multimedia Algorithms

Head: Assoc. Prof. Dr. Borut Žalik

Employees: Dr. David Podgorelec; Matej Gomboši, MSc; Sebastian Krivograd, BSc; Gregor Klanjšek, BSc; Mirko Zadravec, BSc

Centre for Geometric Modelling

Head: Assoc. Prof. Dr. Borut Žalik

Computer Graphics and Artificial Intelligence Laboratory CS - 5

COMPUTER GRAPHICS AND ARTIFICIAL INTELLIGENCE LABORATORY

Head:

Prof. Dr. Nikola Guid

Phone: +386 2 220 74 70


RESEARCH PROJECTS


Industrial project

SO3DA Seminar osnov 3D animacije (Seminar on fundamentals of 3D animation)

Leader: Prof. Dr. Nikola Guid Participants: Simon Kolmanič, Karno Bozi

Financed by: Institute for support of civil society initiative and multicultural collaboration – Pekarna magdalenske mreže


Computer animation has developed into an efficient communication tool, especially useful in the presentation of new products or services. Because of this fact, the Institute for Support of Civil Society initiative and Multicultural Collaboration contacted us to organize a seminar, where their co-workers and others interested in computer animation could hear something about the fundamentals of 3D animation. In addition the aim of the seminar was to prepare the promotional animation of this institute, which will be officially presented in public at the beginning of 2002.

CS - 6 Computer Graphics and Artificial Intelligence Laboratory


CAD – RPIE Computer Aided Design – Rapid Prototyping and Inverse Engineering

Leaders: Prof. Dr. Nikola Guid, Camillo Bandera (Universita di Udine) Participants: Simon Kolmanič, Steffano Filippi Project partner: Universita di Udine

Duration: Feb. to Nov. 2002

The main goals have been to set up bilateral co-operation in the field of computer added design, rapid prototyping and inverse engineering, to present results of common research and to develop new algorithms in the mentioned fields. We will try to transfer the results of common work in the high technology industry.

PUBLICATIONS

Simon Kolmanič, Nikola Guid, “The flattening of arbitrary surfaces by approximation with developable stripes,” in U. Cugini, M. Wozny (Eds.), From geometric modelling to shape modelling: Fundamentals and Applications. Boston, USA, London, Great Britain: Kluwer Academic 2002, pp. 35–46.

Bogdan Lipuš, Nikola Guid, “Genetic algorithms in animation of volumetric clouds,” 24th International Conference on Information Technology Interfaces ITI 2002, Cavtat, Croatia, June 2002, pp. 423–428.

Bogdan Lipuš, Nikola Guid, “Pregled tehnik za prikazovanje oblakov v realnem času,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 19–22.

Karno Bozi, “Proces izdelave kvalitetnega visokoločljivega izhoda bitnih slik,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 279–282.


Simon Kolmanič, Karno Bozi, “Animated video,” presentation of animated video on 8th international festival of computer arts in Maribor, Maribor, Slovenia, May 31, 2002.

Computer Graphics and Artificial Intelligence Laboratory CS - 7

Nikola Guid, “Computer graphics. Curves and surfaces in CAGD,” lecture presented at the postgraduate study of Computer Science, Faculty of Electrical engineering and Computer Science Zagreb, Zagreb, Croatia, Nov. 18, 2002.

Nikola Guid, “Computer graphics. Illumination Models,” lecture presented at the postgraduate study of Computer Science, Faculty of Electrical engineering and Computer Science Zagreb, Zagreb, Croatia, Dec. 16, 2002.


Prof. Dr. Nikola Guid: Programme committee member of international conference Information Society 2002, Ljubljana, Slovenia, Oct. 14–18, 2002.

CS - 8 Computer Architecture and Languages Laboratory

COMPUTER ARCHITECTURE AND LANGUAGES LABORATORY

Head:


Phone: +386 2 220 74 50


RESEARCH PROJECTS


Applied project

L2-3302-0796 Informacijski sistem za projektno vodenje proizvodnje v strojegradnji (Information system for the project oriented production of machinery and working tools)

Leader: Asst. Prof. Dr. Janez Brest Participants: Matej Črepinšek, Robert Krušec

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Lestro Engineering, d. o. o.

This project oriented production model in the field of woodworking machines is used for rapid production adaptation to market demands. To minimize the development time of the product, it takes the efforts of all participants, who have to be able to contribute to the product's development. Furthermore, the participants are required to manage all the modifications and adaptations. The main goal of this research is the design and implementation of an information system for the development, planning and control of the production process for machinery and working tools.

Computer Architecture and Languages Laboratory CS - 9

Industrial project

PONUPP Programska oprema za nadzor in upravljanje procesa proizvodnje (Software for control and management of production process)

Leader: Prof. Dr. Viljem Žumer Participants: Asst. Prof. Dr. Janez Brest, Damijan Rebernak, Borko Boškovič

Financed by: Lestro Ledinek, d. d.

The main objective of this project is the implementation and upgrading of the information system which is currently used in woodwork manufacturing. The project has several phases in which the analysis of currently used information systems is studied, after which the organization of a database is made, and the information system is implemented. One of the project's aims is studying the complexity of the production process and its implementation.


SLO–P-11/01-04 Automatic Generation of Language-Based Tools

Leaders: Prof. Dr. Viljem Žumer, Pedro Henriques (University of Minho) Participants: Asst. Prof. Dr. Marjan Mernik; Mitja Lenič, MSc; Enis Avdičaušević,

MSc; Robert Krušec; Matej Črepinšek; Maria Joao Pereira Varanda Project partner: University of Minho

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Instituto de Cooperacao Cientifica e Tecnologia Internacional

The main aim of the project is to extend language definitions in such a manner that many other language-based tools can be generated and to automatically generate some of them. One of the language-based tools, which we would like to be automatically generated is an algorithm animator and program visualizer. Currently, algorithm animators and program visualizers are strongly language and algorithm oriented. In this project we would like to show that algorithm animators and program visualizators could also be language independent and automatically generated from extended language definitions.




SVN 99/028 Generic, Adaptive and Aspect-Oriented Language Definitions

Leaders: Prof. Dr. Viljem Žumer, Guenter Riedewald (University of Rostock) Participants: Asst. Prof. Dr. Marjan Mernik; Mitja Lenič, MSc; Enis Avdičaušević,

MSc; Robert Krušec; Ralf Laemmel; Elke Tetzner; Wolfgang Lohmann; Christian Stenzel

Project partner: University of Rostock

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Internationales Buro des BMBF


The main objective of this project is to integrate generic, adaptive and aspect-oriented programming with attribute grammars in order to support the practical applicability of attribute grammars in the design and implementation of domain-specific languages (DSL) and other important application areas.

PUBLICATIONS

Janez Brest, Viljem Žumer, “A list scheduling heuristic for allocating the task graph to multiprocessors,” Informatica (Ljublj.), Vol. 26, No. 4, pp. 433–438, Dec. 2002.

Janez Brest, Viljem Žumer, “A simple method for dynamic scheduling in a heterogeneous computing system,” CIT. J. Comput. Inf. Technol., Vol. 10, No. 2, pp. 85–92, June 2002.

Viljem Žumer, Janez Brest, Strukturirano programiranje v C++. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science, Institute of Computer Science 2002.

Viljem Žumer, Janez Brest, Uvod v programiranje in programski jezik C++. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science, Institute of Computer Science 2002.

Jan Heering, Marjan Mernik, “Domain-specific language for software engineering,” 35th Annual Hawaii International Conference on System Science, Hawaii, USA, Jan. 2002, 2 pp.

Enis Avdičaušević, Marjan Mernik, Mitja Lenič, Viljem Žumer, “Experimental aspect-oriented language – AspectCOOL,” ACM symposium on applied computing, Madrid, Spain, Mar. 2002, pp. 943–947.


Marjan Mernik, Mitja Lenič, Enis Avdičaušević, Viljem Žumer, “LISA: an interactive environment for programming language development,” 11th international conference Compiler construction CC 2002, Grenoble, France, Apr. 2002, pp. 1–4.

Pedro Rangel Henriques, Maria Joao Varanda Pereira, Marjan Mernik, Mitja Lenič, Enis Avdičaušević, Viljem Žumer, “Automatic generation of language-based tools,” 2nd Workshop on Language Descriptions, Tools and Applications LDTA '02, Grenoble, France, 2002, 20 pp.

Matej Črepinšek, Marjan Mernik, Viljem Žumer, “Using flocks for solving numerical optimization problem,” 24th International Conference on Information Technology Interfaces ITI 2002, Cavtat, Croatia, June 2002, pp. 395–400.

Matej Črepinšek, Marjan Mernik, Viljem Žumer, “Optimizacija s pomočjo roja delcev in čred,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 261–264.

Aleksander Vreže, Janez Brest, Viljem Žumer, Zmago Brezočnik, “Heterogeni računalniški sistem pri razporejanju ravninskih mnogokotnikov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 23–26.

Andrej Taranenko, Aleksander Vesel, Marjan Mernik, “L(2,1) barvanje grafov z genetskim algoritmom,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 31–34.

Borko Bošković, Damijan Rebernak, Janez Brest, Viljem Žumer, “Preslikava E-R modela v objektno orientiran model,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 63–66.

Damijan Rebernak, Janez Brest, Borko Bošković, Viljem Žumer, “Načrtovanje in implementacija spletnega informacijskega sistema,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 159–162.

Janez Brest, Silvo Roškar, Borko Bošković, Damijan Rebernak, Viljem Žumer, “O pripadnosti materialov in polizdelkov v kosovni proizvodnji,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 187–190.

Janez Brest, “Načrtovanje in implementacija spletnih informacijskih sistemov,” Linux konferenca: strokovno gradivo, Ljubljana, Slovenia, pp. 12–16.


Janez Brest, Damijan Rebernak, Borko Bošković, Viljem Žumer, “Uporaba Linuxa pri gradnji informacijskega sistema v podjetju,” 1st International KIBLIX 2002 Festival – IT Linux festival, Maribor, Slovenia, Nov. 2002, pp. 34–36.


Matej Črepinšek, “Using flocks for solving numerical optimization problems,“ invited lecture at the Computing department at University of Minho, Braga, Portugal, May 28 to June 2, 2002.

Marjan Mernik, “When an how to develop domain-specific languages,“ invited lecture at the Computing department at University of Minho, Braga, Portugal, May 28 to June 2, 2002.

Marjan Mernik, “Attribute grammars operators,“ lecture at the Universität Rostock, Germany, Nov. 5, 2002.

Marjan Mernik, “Can parsers be generated from examples?“ lecture at the Universität Rostock, Fachbereich Informatik, Nov. 7, 2002.


Asst. Prof. Dr. Marjan Mernik: Mini-track chairman and reviewer for Domain-Specific Languages for Software Engineering and co-organiser of Hawaii International Conference on System Sciences, Hawaii, United States, Jan. 7–10, 2002.

Asst. Prof. Dr. Marjan Mernik: Organising committee member of Workshop on Language Description, Tools and Applications, Grenoble, France, Apr. 13, 2002.

Asst. Prof. Dr. Marjan Mernik: International program committee member and reviewer for the Fifth International Scientific Conference on Electronic Computers and Informatics, Košice-Herlany, Slovakia, Oct. 10–11, 2002.

Asst. Prof. Dr. Marjan Mernik: Reviewer for Journal of Computing and Information Technology.

Asst. Prof. Dr. Marjan Mernik: Reviewer for Science of Computer Programming.


Asst. Prof. Dr. Marjan Mernik: Reviewer for Journal of Logic and Algebraic Programming.


Prof. Dr. Viljem Žumer: Research work on Slovenian-Portuguese project SLO–P-11/01-04, Braga, Portugal, Apr. 16 to May 5, 2002.

Matej Črepinšek, Asst. Prof. Dr. Marjan Mernik:

Research work on Slovenian-Portuguese project SLO–P-11/01-04, Braga, Portugal, May 28 to June 2, 2002.

Tomaž Kosar, Asst. Prof. Dr. Marjan Mernik:

Research work on Slovenian-German project SVN 99/028, Rostock, Germany, Nov. 3–9, 2002.

GUESTS AND VISITORS

Pedro Henriques, Maria Joao Pereira Varanda (University of Minho, Braga, Portugal):

Research work on Slovenian-Portuguese project SLO–P-11/01-04, Apr. 14–18, 2002.

Wolfgang Lohmann, Christian Stenzel (University of Rostock, Rostock, Germany):

Research work on Slovenian-German project SVN 99/028, Sept. 22–28, 2002.

CS - 14 System Design Laboratory

SYSTEM DESIGN LABORATORY

Head:

Prof. Dr. Peter Kokol

Phone: +386 2 220 74 57


RESEARCH PROJECTS


Applied project

ORDIS Osnove raziskovalnega dela in statistične obdelave (Statistics and Basics of Research Work)

Leader: Prof. Dr. Peter Kokol Participants: Asst. Prof. Dr. Vili Podgorelec, Asst. Prof. Dr. Milan Zorman, Dr.

Špela Hleb-Babič, Dr. Matej Šprogar


The Laboratory for System Design organized an educational course for the Ministry for Education, Science and Sport.

Industrial project

SOM Statistična obdelava medicinskih podatkov (Statistical Analysis of Medical Data)

Leader: Prof. Dr. Peter Kokol Participants: Asst. Prof. Dr. Vili Podgorelec, Asst. Prof. Dr. Milan Zorman, Dr.

Špela Hleb-Babič, Dr. Matej Šprogar

Financed by: General Hospital of Maribor, Health Center Adolf Drolc

During various medical research huge medical data bases are created which are difficult to analyse using common statistical methods. Therefore the Laboratory for System Design

System Design Laboratory CS - 15

provides comprehensive complex statistical analysis of such data to medical institutions.


ISOQ (SLO–P-10/01-04)

ISOQ – Improvement of Software Quality with the Complexity Metrics

Leader: Prof. Dr. Peter Kokol Participants: Mitja Lenič, MSc; Petra Povalej; Asst. Prof. Dr. Milan Zorman Project partners: University of Madeira

Reliability is one of the key issues in assuring the quality of software in complex systems. It is very important to economically and consistently assure the appropriate level of software reliability, because more and more activities and systems rely on software. One of the ways to assure software reliability is to use software complexity metrics. The development of software is a complex and complicated process, where we unintentionally make errors in the code. It has been proven that the pattern of making unintentional errors in code is related to measurable quantities of the code, especially those measured with software complexity metrics. For instance, large systems are made of different modules, where each module can be described by its attribute values. It could be very appropriate to predict the number of errors in the code, using these attribute values.

Both of our projects deal with researching the use of fractal software complexity metrics in predicting and evaluating the characteristics of software.

5OP PLANET, ref. No.: IST-2000-29656

Network of Excellence in AI Planning

Leader: Prof. Dr. Peter Kokol Participants: Asst. Prof. Dr. Milan Zorman; Mitja Lenič, MSc


The aim of the project is to encourage research in the field of artificial intelligence and planning in different areas. Our institution is involved in the design of hybrid intelligent systems in the field of planning.

ISCoMAA Intelligent Systems Construction by Multiple Autonomous Agents

Leaders: Prof. Dr. Peter Kokol, Dr. Lenka Lhotska (Czech Technical University of Prague)

Participants: Asst. Prof. Dr. Milan Zorman; Asst. Prof. Dr. Vili Podgorelec; Mitja


Lenič, MSc; Dr. Matej Šprogar Project partner: Czech Technical University of Prague


In order to design successful intelligent systems to be used in medical applications, we must design them with an appropriate design methodology. Therein lies another weakness–very few, if any, such methods exist in the world. Therefore the goals of our research are: – to develop successful design methods – to use these methods in designing real-world agent based intelligent medical systems.

5OP AgentLink II ref. No.: IST-1999-29003

Continuation of a Network of Excellence for Agent-Based Computing



The aim of the project is to encourage research in the field of agent technologies. Our institution is involved in the design of intelligent agent systems in the field of medicine.

5OP EUNITE, ref. No.: IST-2000-29207

European Network on Intelligent Technologies for Smart Adaptive Systems



The aim of the project is to encourage research in the field of adaptive systems in different areas. Our institution is involved in the design of adaptive intelligent systems in the field of medicine.

EDUTOP Educational Tools For PDAs

Leaders: Prof. Dr. Peter Kokol, Dr. Petra Rietsch (MEDIA concepts) Participants: Mitja Lenič, MSc; Petra Povalej; Asst. Prof. Dr. Milan Zorman Project partner: ÖAD Office for Scientific and Technological Cooperation

Financed by: ÖAD Office for Scientific and Technological Cooperation; Ministry of Education, Science and Sport of the Republic of Slovenia

The specific aims of the projects are:


– To design a Persona Digital Assistant (PDA) oriented educational tool development paradigm.

– To develop a framework for integrating machine learning and machine intelligence in the PDA educational tools.

– To design a meta tool enabling educators to develop, adapt and maintain their own educational tools without great effort.

– To disseminate the project achievements to as wide audience as possible.

SIIZO Sistemi integracije inteligence v zdravstveno okolje

Leaders: Assoc. Prof. Dr. Tatjana Welzer Družovec, Dr. Lorenzo Moreno Ruiz (Centro Superior de Informatica Universidad de La Laguna)

Participants: Prof. Dr. Peter Kokol, Asst. Prof. Dr. Marjan Družovec, Prof. Emeritus Dr. Bruno Stiglic, Boštjan Brumen, Dr. Špela Hleb-Babič, Asst. Prof. Dr. Milan Zorman, Asst. Prof. Dr. Vili Podgorelec

Project partner: Centro Superior de Informatica Universidad de La Laguna

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Ministry of Foreign Affairs of the Kingdom of Spain, European Union

Within the project we will study the simulation of hospital management. The basis of the simulation will be a data base containing data of administration, sources, schedules, employees, etc. Second part of the project represents a system for diagnosing Alzheimer disease based on the analysis of EEG signals. This analysis will be performed with the use of the symbolic description of EEG signal, soft automata, statistical analysis, and neural networks.

SQUFOL Software Quality Founded On Design Laws

Leader: Prof. Dr. Peter Kokol Participants: Mitja Lenič, MSc; Asst. Prof. Dr. Milan Zorman Project partners: The Intelligent Computer Systems Centre, University of The West of

England, South Bank University, Lucent Technologies Network Systems GmbH, Rila Solutions, ZEUS Consulting S.A.-LogicDIS Group, Logic DIS S.A.

Financed by: European Commission, Information Systems Technology

As with systems in management science and economics, software development (the development includes the whole software system life-cycle: from the idea/statement of need to its use and maintenance) has similar system attributes, i.e. as a complex, dynamic, non-linear and adaptive system. Consequently, the aim of the session is to gain a fundamental


understanding of the software process and the software product. The proposed approach will use the science of complexity, various system theories, the theory of chaos, fractals and other, traditionally "physically based" methodologies, theory of complex adaptive systems, biologically and evolutionary inspired economic/market theories, intelligent data analysis, data mining which are not yet recognised by software design researchers. Our aim is to significantly improve the basic knowledge about and the fitness and quality of the software product, its quality and its development process in short develop and introduce well understood software design processes first leading to well understood software and related products of superior quality.

IMEDA (SLO–US-2002/06)

IMEDA – Intelligent Medical Data Analysis

Leaders: Prof. Dr. Peter Kokol, Dr. Margaret G.E. Peterson (Hospital For Special Surgery, Cornell University)

Participants: Petra Povalej; Mitja Lenič, MSc; Asst. Prof. Dr. Milan Zorman Project partner: Hospital For Special Surgery, Cornell University


The number and size of medical databases (electronic or manual) is increasing enormously. While providing great help for the successful health care process, they also contain much “hidden knowledge”, which is not evident without careful and elaborate analysis. Statistical analysis and various computerised tools can be a great help, but often this is not enough and more patterns can be discovered using less conventional methods like intelligent systems. To be able to design successful intelligent medical systems (IMS), we must design them with appropriate design paradigms, one of them is MetaMet – a two levelled system design approach. Single methods like neural networks, evolutionary algorithms, decision trees and others can be quite successful in intelligent data analysis, but they also have many weaknesses that may be solved with a combination of their methods – a hybrid approach, and with the employment of the theory of chaos and complexity. Medical databases are normally distributed over several computers, institutions or even countries, usually using different operating systems or protocols. Therefore a heterogeneous approach has to be used. The additional advantage of heterogeneous computing is the enlarged computational power, that can be used to effectively execute resource-consuming algorithms.




COSOC (PSP-17) COSOC – Comprehending Software for Citizens

Leader: Prof. Dr. Peter Kokol, Dr. Robert E. Smith (The Intelligent Computer Systems Centre, University of The West of England)

Participants: Asst. Prof. Dr. Milan Zorman; Mitja Lenič, MSc; Petra Povalej Project partner: The Intelligent Computer Systems Centre, University of The West of

England

Financed by: The British Council


This project deals with the measurement of program systems usability from the user's aspect. We developed a model which, based on the usability measurements, enables continuous system improvement.

SQUAB-M Physical Based Software Complexity Metrics

Leaders: Prof. Dr. Peter Kokol, Dr. Miklos Biro (Computer and Automation Institute Hungarian Academy of Sciences)

Participants: Asst. Prof. Dr. Vili Podgorelec; Asst. Prof. Dr. Milan Zorman; Mitja Lenič, MSc; Dr. Matej Šprogar

Project partner: Computer and Automation Institute Hungarian Academy of Sciences



Reliability is one of the key issues in assuring the quality of software in complex systems. It is very important to economically and consistently assure the appropriate level of software reliability, because more and more activities and systems rely on software. One of the ways to assure software reliability is to use software complexity metrics. The development of software is a complex and complicated process, where we unintentionally make errors in the code. It has been proven that the pattern of making unintentional errors in code is related to measurable quantities of the code, especially those measured with software complexity metrics. For instance, large systems are made of different modules, where each module can be described by its attribute values. It could be very appropriate to predict the number of errors in the code, using these attribute values.

Both of our projects deal with researching the use of fractal software complexity metrics in predicting and evaluating the characteristics of software.


PUBLICATIONS

Vili Podgorelec, Peter Kokol, “Evolutionary induced decision trees for dangerous software modules prediction,” Inf. process. lett., Vol. 82, pp. 31–38, 2002.

Vili Podgorelec, Peter Kokol, Bruno Stiglic, Ivan Rozman, “Decision trees: an overview and their use in medicine,” J. med. syst., Vol. 26, No. 5, pp. 445–463, Oct. 2002.

Milan Zorman, Hans-Peter Eich, Bruno Stiglic, Christian Ohmann, Mitja Lenič, “Does size really matters – Using a decision tree approach for comparison of three different databases from the medical field of acute appendicitis,” J. med. syst., pp. 465–477.

Matej Šprogar, Mitja Lenič, Silvia Alayon, “Evolution in medical decision making,” J. med. syst., Vol. 26, No. 5, pp. 479–489, Oct. 2002.

Petra Povalej, Peter Kokol, “Alternative approach to determine blood lipids with intelligent systems,” Health inform. Eur., 10 pp.

Alojz Tapajner, Peter Kokol, “Uporaba inteligentnih sistemov pri napovedovanju gibanja tečajev vrednostnih papirjev,” Uporab. inform. (Ljubl.), Vol. 10, No. 2, pp. 92–101, 2002.

Peter Kokol, Milan Zorman, Mitja Lenič, Petra Povalej, Alojz Tapajner, Osnove raziskovalnega dela in statistične obdelave: priročnik za tečaj Ministrstva za šolstvo in šport. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Vili Podgorelec, Peter Kokol, Ryuichi Yamamoto, Gou Masuda, Norihiro Sakamoto, “Medical knowledge extraction via hybrid decision trees,” Information modelling and knowledge bases XIII Frontiers in artificial intelligence and applications), Amsterdam, Vol. 73, pp. 390–397.

Maurizio Pighin, Vili Podgorelec, Peter Kokol, “Program risk definition via linear programming techniques,” Eighth IEEE Symposium on Software Metrics, Ottawa, Canada, June 2002, pp. 197–202.

Milan Zorman, Peter Kokol, Bruno Stiglic, “Transforming backpropagation neural networks to decision trees using NN-DT cascade method,” Computational intelligence and applications, Atlanta, USA, pp. 75–80.

Peter Kokol, Vili Podgorelec, Milojka Molan Štiglic, “Searching for new patterns in medical data with evolutionary programming,” Annual Symposium of the American Medical Informatics Association, San Antonio, USA, Nov. 2002, pp. 1067.


Mitja Lenič, Peter Kokol, Milan Zorman, Petra Povalej, Bruno Stiglic, “Improved knowledge mining with the multimethod approach,” IEEE Workshop The foundation of data mining and knowledge discovery ICDM 2002, Maebashi City, Japan, Dec. 2002, pp. 257–262.

Milan Zorman, Peter Kokol, “Hybrid NN-DT cascade method for generating decision trees from backpropagation neural networks,” 9th international conference on neural information processing ICONIP '02, Singapore, 5 pp.

Petra Povalej, Peter Kokol, Milan Zorman, Jernej Završnik, “Classic decision tree induction versus genetic algorithms: a case study,” 9th international conference on neural information processing ICONIP '02, Singapore, 5 pp.

Mitja Lenič, Peter Kokol, “Combining classifiers with multimethod approach,” Second international conference on Hybrid Intelligent Systems, Santiago de Chile, Chile, Dec. 2002, pp. 374–383.

Peter Kokol, Marko Kokol, “Teaching evolution with visual computer simulations,” IASTED International conference Computers and advanced technology in education, Cancun, Mexico, May 2002, pp. 380–383.

Peter Kokol, Milan Zorman, M. Molan Štiglic, “Intelligent system for cardiac diseases decision making in the young,” Cardiol. young, pp. 47.

Petra Povalej, Peter Kokol, Bruno Stiglic, Irene Litvan, Dušan Flisar, “Verifying clinical criteria for Parkinsonian disorders with decision trees,” Intelligent data analysis in medicine and pharmacology IDAMAP 2002, Lyon, France, July 2002, pp. 55–59.

Vili Podgorelec, Peter Kokol, Ivan Rozman, “AREX – Classification rules extracting algorithm based on automatic programming,” 15th European conference on artificial intelligence ECAI 2002, Lyon, France, July 2002, pp. 330–334.

Pedro Rangel Henriques, Maria Joao Varanda Pereira, Marjan Mernik, Mitja Lenič, Enis Avdičaušević, Viljem Žumer, “Automatic generation of language-based tools,” 2nd Workshop on Language Descriptions, Tools and Applications LDTA '02, Grenoble, France, 2002, 20 pp.

Marjan Mernik, Mitja Lenič, Enis Avdičaušević, Viljem Žumer, “LISA: an interactive environment for programming language development,” 11th international conference Compiler construction CC 2002, Grenoble, France, Apr. 2002, pp. 1–4.

Ana Isabel Cardoso, Rui Gustavo Crespo, Peter Kokol, “How to measure the complexity of a program text?,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 4 pp.


Peter Kokol, M. Pighin, “Intelligent chaos based fault prediction in software,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 6 pp.

Vili Podgorelec, Peter Kokol, Ivan Rozman, “Autonomous agents for classification in health care,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 7 pp.

Vili Podgorelec, Peter Kokol, Ivan Rozman, Werner Brunck, “Intelligent software engineering using logistic maps,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 5 pp.

Milan Zorman, Peter Kokol, “Building decision trees with hybrid NN-DT cascade method,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 5 pp.

Milan Zorman, Peter Kokol, “The SQUFOL – Software quality founded on design laws,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 6 pp.

Enis Avdičaušević, Marjan Mernik, Mitja Lenič, Viljem Žumer, “Experimental aspect-oriented language – AspectCOOL,” ACM symposium on applied computing, Madrid, Spain, Mar. 2002, pp. 943–947.

Mitja Lenič, Peter Kokol, “Combining methods with multimethod approach,” European symposium on intelligent techniques, hybrid systems and their implementation of smart adaptive systems Eunite 2002, Albufeira, Algarve, Portugal, pp. 611–614.

Matej Šprogar, Peter Kokol, Silvia Alayón, “Autonomous evolutionary alghorithm in medical data analysis,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 71–76.

Vili Podgorelec, Peter Kokol, Milojka Molan Štiglic, “Searching for new patterns in cardiovascular data,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 111–116.

Milan Zorman, Gou Masuda, Peter Kokol, Ruyichi Yamamoto, Bruno Stiglic, “Mining diabetes database with decision trees and association rules,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 134–139.


Mitja Lenič, Peter Kokol, Ryuichi Yamamoto, “IFSIMS – internet framework service for intelligent medical systems,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 295–300.

Martin Brumec, Marko Kokol, Marko Petrič, Peter Kokol, “BUČKO (Smart learning advisor),” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, pp. 86–88.

Milan Zorman, Peter Kokol, Petra Povalej, “Izboljšava algoritma za dinamično diskretizacijo numeričnih atributov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 15–18.

Enis Avdičaušević, Mitja Lenič, Peter Kokol, “Multimetodno odkrivanje asociativnih pravil,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 35–38.

Mitja Lenič, Petra Povalej, Peter Kokol, “Ocena razvojnega stanja programske opreme,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 67–70.

Matej Šprogar, Peter Kokol, “Avtonomne evolucijske metode v klasifikaciji,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 95–98.

Petra Povalej, Peter Kokol, “Uporaba odločitvenih dreves v medicini,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 357–360.

Matej Mertik, “Evolucijski induktivni pristop avtomatskega učenja pri odkrivanju novega znanja,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 443–444.

Tine Brumec, Marko Kokol, Marko Petrič, Peter Kokol, “Bučko ("brihtni učni konzultant"),” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 486–490.

Petra Povalej, Peter Kokol, Jernej Završnik, “Iskanje neinvazivnih metod za določanje holesterola pri otrocih,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 496–500.

Mitja Lenič, Peter Kokol, Ryuichi Yamamoto, “Internet storitev za podporo pri odločanju v medicini,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 501–505.


Ana Habjanič, Peter Kokol, Dušanka Mičetić-Turk, “Sistemski pristop pospeševanja raziskovalne dejavnosti v zdravstveni negi,” 21. znanstvena konferenca o razvoju organizacijskih ved, Portorož, Slovenia, Mar. 2002, pp. 1432–1435.

Vili Podgorelec, Peter Kokol, Ivan Rozman, “Searching for software reliability with text mining,” Fifth joint conference on knowledge-based software engineering, Maribor, Slovenia, Sept. 2002, Vol. 80, pp. 205–214.

Peter Kokol, “Research paradigms parallels in nursing and informatics sciences,” 1st International Workshop and Summer School on Nursing Research, Maribor, Slovenia, Aug. 2002, pp. 22–23.

Ana Habjanič, Peter Kokol, Dušanka Mičetić-Turk, Danica Železnik, “Systemic approach to accelerate the research activities at nursing,” 1st International Workshop and Summer School on Nursing Research, Maribor, Slovenia, Aug. 2002, pp. 31–33.


Peter Kokol, “Chaos Based Software Complexity Metrics,” invited lecture in topic Chaos Based Software Complexity Metrics, Nürnberg, Germany, Feb. 15, 2002.

Peter Kokol, “Software Purity Metrics,” lecture at the Madeira University, Madeira, Portugal, May 14, 2002.

Milan Zorman, “Hybrid Machine Learning Approaches,” presentation of hybrid machine learning methods, Prague, Czech Republic, Nov. 5, 2002.

Mitja Lenič, “Multimethod approach to Intelligent Systems,” presentation of Multimethod approach, Prague, Czech Republic, Nov. 6, 2002.

Peter Kokol, “Intelligent Systems,” talk during the visit to Japan due to the JSPS grant, Tokyo University, Tokyo, Japan, Dec. 13, 2002.

Mitja Lenič, “Software Metrics,” lecture about physically based software complexity metrics, Funchal, Portugal, Dec. 16, 2002.


Prof. Dr. Peter Kokol: Chairman of The 15th IEEE Symposium on Computer-Based Medical Systems, Maribor,


Slovenia, June 4–7, 2002.

Mitja Lenič, MSc, Asst. Prof. Dr. Milan Zorman:

Co-ordinated organisation and implementation of The 15th IEEE Symposium on Computer-Based Medical Systems, Maribor, Slovenia, June 4–7, 2002.

Prof. Dr. Peter Kokol: Programme committee chairman of 1st International Workshop and Summer School on Nursing Research, Maribor, Slovenia, Aug. 27–29, 2002.

Prof. Dr. Peter Kokol: Editorial Board of the Applied Systems Studies journal, Kluwer.

Prof. Dr. Peter Kokol: Editor-in-Chief, Informatica Medica Slovenica.

Prof. Dr. Peter Kokol: Editor, IEEE Computational Medicine Newsletter.

Prof. Dr. Peter Kokol: President of technical committee IEEE Computational Medicine Newsletter.

Prof. Dr. Peter Kokol: Member of steering committee of the Slovene Society Nursing Informatics.

Prof. Dr. Peter Kokol: Member of working group EFMI-WG on Nursing Informatics.

Prof. Dr. Peter Kokol: Reviewer for IEEE Software.

Prof. Dr. Peter Kokol: Reviewer for IEEE Computer.

Prof. Dr. Peter Kokol: Editor of a special issue of Journal of Medical Systems.


Prof. Dr. Peter Kokol: Preparation of the SQUFOL project., D-90411 Nürnberg, Germany, Feb. 15–18, 2002.

Prof. Dr. Peter Kokol: Bilateral project ISOQ (SLO–P-10/01-04), formal


call, Madeira, Portugal, May 11–18, 2002.

Prof. Dr. Peter Kokol: Bilateral project ISOQ (SLO–P-10/01-04), formal call, Madeira, Portugal, July 11–22, 2002.

Mitja Lenič, MSc, Petra Povalej, Asst. Prof. Dr. Milan Zorman:

Bilateral project ISCoMAA, formal call, Prague, Czech Republic, Nov. 4–8, 2002.

Prof. Dr. Peter Kokol, Asst. Prof. Dr. Milan Zorman:

The JSPS grant at the Osaka Medical College, Japan, Dec. 12–17, 2002.

Mitja Lenič, MSc: Visit within the SOCRATES programme, Madeira, Portugal, Dec. 16–31, 2002.

GUESTS AND VISITORS

Dr. Gou Masuda, Dr. Ryuichi Yamamoto (Osaka Medical College, Dept. of Medical Informatics, Osaka 569-8686, Japan):

Plans for dissemination of project results, preparation of new project proposal, Mar. 10–13, 2002.

Dr. Gabriel Pestana (University of Madeira, Madeira, Portugal):

Visit through the SOCRATES–ERASMUS programme with lecture “Geographical Information Systems,” May 6, 2002.

Dr. Ana Isabel Cardoso (University of Madeira, Madeira, Portugal):

Visit through the SOCRATES–ERASMUS programme with lecture on “Alpha Metrics,” May 8, 2002.

Dr. Mayumi Yoshida, Dr. Ryuichi Yamamoto, Dr. Gou Masuda (Osaka Medical College, Dept. of Medical Informatics, Osaka 569-8686, Japan):

Project meeting, June 4–7, 2002.

Dr. Eveline Riedling (Institute of Industrial Electronics and

Meeting on founding of a new journal JAPID, June 5, 2002.


Material Science Vienna University of Technology, Vienna A-1040, Austria):

Dr. Robert E. Smith (The Intelligent Computer Systems Centre, University of The West of England, Bristol, United Kingdom):

A visit within the bilateral project COSOC, June 9–14, 2002.

Dr. Manolis Chrysostalis (ZEUS Consulting S.A.-LogicDIS Group, 26221 Patra, Greece), Dr. Werner Brunck (Lucent Technologies Network Systems GmbH, D- 90411 Nürnberg, Germany), Dr. Eva Feuer (MTA SZTAKI, Budapest, Hungary), Dr. Ilian Mihaylov (Rila Solutions, 1113 Sofia, Bulgaria), Dr. Sue Black (South Bank University, London, United Kingdom), Dr. Robert E. Smith (The Intelligent Computer Systems Centre, University of The West of England, Bristol, United Kingdom):

SQUFOL 5th FP project meeting, Oct. 21–22, 2002.

Dr. Pekka Makkonen (University of Jyvaskyla, Department of Computer Science and Information Systems, Jyvaskyla, Finland):

Visit within the SOCRATES–ERASMUS programme with lectures in topic “Distant Learning,” Oct. 21–25, 2002.

Dr. Ana Isabel Cardoso (University of Madeira, Madeira, Portugal), Dr. Rui Gustavo Crespo (Technical University of Lisabon, Lisabon, Portugal):

A visit within the bilateral project ISOQ – Improvement of Software Quality with the Complexity Metrics, Nov. 25, 2002.



Petra Povalej: 1st Place Award for the best student paper, IEEE symposium on computer-based medical systems, Maribor, Slovenia, June 7, 2002.

Prof. Dr. Peter Kokol: Silver Medal of University of Maribor, Sept. 18, 2002.

Petra Povalej, Prof. Dr. Peter Kokol, Asst. Prof. Dr. Milan Zorman: sEAL '02 Best Poster Award, Nov. 22, 2002.

Prof. Dr. Peter Kokol: IEEE CS Activity Award for successful leadership of TCCM, Dec. 15, 2002.

System Software Laboratory CS - 29

SYSTEM SOFTWARE LABORATORY

Head:

Prof. Dr. Damjan Zazula

Phone: +386 2 220 74 80


RESEARCH PROJECTS



J3-4482-0334-02/3.05

Značilnosti antralnih foliklov in zoritvena sposobnost jajčnih celic v pogojih in vitro (Characteristics of antral follicles and the ability of in vitro ova maturation)

Leader: Prof. Dr. Veljko Vlaisavljević (Teaching Hospital of Maribor) Participants: Prof. Dr. Damjan Zazula; Boris Cigale, MSc; Jurij Munda Project partner: Teaching Hospital of Maribor


This project continues the research work done so far on the growth of dominant follicles either in natural or in stimulated cycles. Comparative examinations are gong to be conducted by a 3D ultrasound device. Therefore, the first project months were devoted to the studying of the device and its proprietary formats of the stored data. We are developing a software interface which is going to support processing of the obtained ultrasound recordings by our own recognition algorithms.


NEW Neuromuscular Assessment in the Elderly Worker

Leader: Prof. Dr. Damjan Zazula Participants: Dr. Dean Korošec, Aleš Holobar

CS - 30 System Software Laboratory

Project partner: Politecnico di Torino


The main objectives of the NEW (Neuromuscular assessment in the Elderly Worker) project are non-invasive assessment of the muscle properties in the elderly workers, the prevention of muscle disorders and the reduction of its consequences. Our main focus is on the extraction of information from the raw signals detected on the muscles during their contraction, specifically on decomposition of surface EMG signals.

In last year the performance of surface EMG decomposition techniques based on the higher-order statistics was tested and improved. New approaches for optimisation of non-linear equations system were developed and their performance studied. We verified some important theoretical issues concerning the model of the surface EMG signals and the achievable performance of source separation algorithms. Based on the theoretical ascertainment a new decomposition method was proposed. Although following simple decomposition concepts, the method proved to offer an equivalent performance to more complex and time consuming blind source separation methods that are based on the joint diagonalization of spatial time-frequency distributions of observed signals.

AREVIDERO Assessment and Revision of Virtual Delivery Room

Leader: Prof. Dr. Damjan Zazula Participants: Dr. Dean Korošec, Matjaž Divjak, Aleš Holobar Project partners: Lucille Packard Children's Hospital at the Stanford University,

Lionheart Technologies Incorporated


AREVIDERO (Assessment and Revision of Virtual Delivery Room) project extends the work of VIDERO (Virtual Delivery Room) project whose main goal was to create a virtual environment in which a group of medical students or even doctors could perform virtual neonatal resuscitation. AREVIDERO project concentrates on validation and verification of VIDERO’s program code, improvement and extension of newborn’s life signs, and practical evaluation of the virtual training environment in educational processes of neonatal medicine.

During last year we collaborated in start-up and testing of the VIDERO system on computers of Lucille Packard Children's Hospital at the Stanford University, Palo Alto, USA. Together with their experts we also designed a program of the validation study, in which we planned to use the VIDERO system in the introductory training of medical students. Currently the program is still in the procedure of the ethic committee of the hospital. Unfortunately, the realisation of the study had to be delayed due to very intensive activities in establishing the Center for Paediatric Education (CAPE, http://news-service.stanford.edu/news/ november13/cape.html), led by Dr. Halamek. However, VIDERO is now already one of the tools in the rich arsenal of technologies, which CAPE, as the first such institution in the world,


is introducing in the organised simulated training of neonatologists.

On the other hand we have meanwhile, in the scope of more technical project activities, complemented and improved our knowledge and software technologies for further development of virtual reality training systems. We obtained (outside of the AREVIDERO project, in which costs of equipment and work are not eligible) a licence for Cortona SDK software, with which we plan to design and implement new versions of the 'virtual baby', based on, of course, rich experience from both VIDERO and AREVIDERO collaborations.

CoLoS Conceptual Learning of Science (American-European project)

Leader: Prof. Dr. Damjan Zazula Participants: Dr. Danilo Korže, Dr. Dean Korošec, Asst. Prof. Dr. Božidar

Potočnik, Matjaž Divjak, Jurij Munda

Financed by: System Software Laboratory, Faculty of Electrical Engineering and Computer Science Maribor

The System Software Laboratory contributed to the CoLoS activities in 2002 as well. We upgraded selected teaching tools which had been developed in the previous years. Especially a lot of attention was paid to completion of the virtual delivery room documentation, which initiated submissions of a few journal papers. The laboratory members were also invited to speak about the virtual baby at the opening plenary session of Electrotechnical and Computer Science conference ERK 2002 at Porotrož, Slovenia.

IST-1999-10378 A generic environment for bio-numerical simulation – SimBio

Leader: Asst. Prof. Dr. Božidar Potočnik Participants: Prof. Dr. Damjan Zazula; Dušan Heric; Boris Cigale, MSc; Daniel

Bernad Project partners: University of Sheffield, Teaching Hospital of Maribor


The central objective of the ongoing SimBio project activities is the improvement of clinical and medical practices by the use of numerical simulation for bio-medical problems. Building on existing experience with particular applications, a generic simulation environment will be produced which will provide an innovative enabling technology for advanced clinical practice and health care. A key feature in the SimBio project is the possibility to use individual patient data as input to the modelling and simulation process. The SimBio generic environment will be validated and evaluated by three specific applications: – electromagnetic source localisation within the human brain based on

electroencephalography (EEG) and magnetoencephalography (MEG) measurements at the surface of the head;


– bio-mechanical simulations of the human head, including modelling of neurodegenerative diseases and neurosurgical interventions;

– the design of novel replacement parts for the menisci of the human knee joint and methods for their surgical implantation.

Our laboratory is responsible to perform site independent SimBio generic environment installation and evaluation/validation of results generated in order to solve the problem of Design of novel replacement parts for the menisci of the human knee joint and methods for their surgical implantation (prosthesis design). In last year we had begun to install the SimBio generic environment. We fixed the procedure for the MR imaging material acquisition and we also developed software interfaces for their transfer into the SimBio environment. We also developed an Image Segmentation Tool (IST tool), i.e. a helping tool for manual segmentation/annotation of the MR images (not necessarily knee images). It enables that clinicians manually annotate (segment) every 2D slice of the MR sequence.

We are also responsible for a verification of the SimBio environment image segmentation results. For this purpose we start to develop an Image Verification Tool (IPVT tool). This tool will measure an accuracy of the Simbio environment image segmentation results according to several statistical measures. Currently, the IPVT tool enables 2D verification, i.e. differences between image processing results of the SimBio environment and manual annotations of clinicians are observed on every 2D MR slice.



J3-2085-0334-01 Značilnosti dominantnega folikla v nestimuliranem ciklusu (Characteristic of the Dominant Follicle in Unstimulated Cycles)

Leader: Prof. Dr. Veljko Vlaisavljević (Teaching Hospital of Maribor) Participants: Prof. Dr. Damjan Zazula, Dr. Dean Korošec, Asst. Prof. Dr. Božidar

Potočnik, Jurij Munda, Nicolas Sergent Project partner: Teaching Hospital of Maribor


Duration: Jan. 2000 to June 2002

This project terminated in June 2002. The main goal achieved was a detailed study of characteristics of the dominant ovarian follicle. In the last year, an extensive research analysis of ultrasound examinations was completed. We developed automatic computer algorithms for the detection and reconstruction of perifollicular vascular network. The approach is based on scanning of the digitised recordings in order to determine the position


of dominant follicle in each image frame. The recognition is supported by cellular neural networks. The second recognition step deals with power Doppler ultrasound images which are converted from the original RGB to the HSV format. This way, a better contrast is obtained for an optimum separation of blood-flow regions from the background and the follicle. It facilitates more accurate detection of smaller blood vessels. Finally, all the recognised regions belonging to the follicle and blood vessels in separate, successive image frames are combined into a 3D model. Quantitative assessment of the blood vessel and follicle volumes is also given.

3D reconstruction of perifollicular blood vessels network

Contribution of the most important blood vessels in the perifollicular network

PUBLICATIONS

Božidar Potočnik, Damjan Zazula, “Automated analysis of a sequence of ovarian ultrasound images. Part I, Segmentation of single 2D images,” Image vis. comput., Vol. 20, issue 3, pp. 217–225, 2002.

Božidar Potočnik, Damjan Zazula, “Automated analysis of a sequence of ovarian ultrasound images. Part II, Prediction-based object recognition from a sequence of images,” Image vis. comput., Vol. 20, issue 3, pp. 227–235, 2002.

Ivan Gerlič, Matjaž Debevc, Nadja Dobnik, Branislav Šmitek, Danilo Korže, Načrtovanje in priprava študijskih gradiv za izobraževanje na daljavo. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Aleš Holobar, Damjan Zazula, “A new approach for blind source separation of convolutive mixtures of pulse trains,” 4th International Workshop on Biosignal Interpretation BSI 2002, Como, Italy, June 2002, pp. 163–166.


Aleš Holobar, Cédric Févotte, Christian Doncarli, Damjan Zazula, “Single autoterms selection for blind source separation in time-frequency plane,” XI European Signal Processing Conference EUSIPCO 2002, Toulouse, France, Sept. 2002, 4 pp.

Dean Korošec, Kari Kumpulainen, Thomas Fox McManus, “Survey on use of ICT in University teaching and learning: method and content,” SITE 2002, Norfolk, USA, 2 pp.

Damjan Zazula, Eric Plevin, “An approach to decomposition of muscle and nerve signals,” WSEAS Int. Conference Signal, Speech and Image Processing ICOSSIP 2002, Skiathos, Greece, Sept. 2002, pp. 1351–1356.

Dean Korošec, Aleš Holobar, Matjaž Divjak, Damjan Zazula, L. P. Halamek, “Computer-assisted resuscitation training: modelling and visualisation of vital signs,” ESPNIC 2002, Ljubljana, Slovenia, June 2002, pp. 65.

Eric Plévin, Damjan Zazula, “Decomposition of surface EMG signals using non-linear LMS optimisation of higher-order cumulants,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 149–154.

Boris Cigale, Matjaž Divjak, Damjan Zazula, “Application of simulated annealing to biosignal classification and segmentation,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 165–170.

Dean Korošec, Aleš Holobar, Matjaž Divjak, Damjan Zazula, “Dynamic VRML for simulated training in medicine,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 205–210.

Božidar Potočnik, Boris Cigale, Damjan Zazula, “The XUltra project – automated analysis of ovarian ultrasound images,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 262–267.

Dušan Heric, Damjan Zazula, “Sistem za verzioniranje datotek – FVS,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 71–74.

Matjaž Divjak, Damjan Zazula, “Bimodalno sledenje gibanju obraza in rok,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 303–306.

Boris Cigale, Damjan Zazula, “Hišni nadzorni sistem INSOS – projektno vodene vaje na smeri logika in sistemi,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 411–414.



Dean Korošec, “Technology & Services for e-learning at UM,” presentation for the representatives of University of Reno, Nevada, HIT Nova Gorica and rector of the University of Maribor, Maribor, Slovenia, Jan. 8, 2002.

Dean Korošec, “Streaming Media for Education,” lecture at the VISICOM workshop, Maribor, Slovenia, Jan. 24, 2002.

Dean Korošec, “Introduction to time-frequency representations,“ presentation at the project meeting Topical NEW Meeting on Signal Processing, Maribor, Slovenia, Feb. 23–24, 2002.

Aleš Holobar, “Blind Source Separation Tutorial,” lecture at the 2nd FP5–NEW project topical meeting, Maribor, Slovenia, Feb. 23, 2002.

Aleš Holobar, “Surface EMG Decomposition Using a Novel Approach for Blind Source Separation,” presentation at the 2nd FP5–NEW project topical meeting, Maribor, Slovenia, Feb. 23, 2002.

Aleš Holobar, “Single Autoterms selection and Iterative Joint Diagonalization Algorithm,” presentation at the 2nd FP5–NEW project topical meeting, Maribor, Slovenia, Feb. 23, 2002.

Damjan Zazula, “Introduction to higher-order statistics (cumulants),“ presentation at the project meeting Topical NEW Meeting on Signal Processing, Maribor, Slovenia, Feb. 23–24, 2002.

Damjan Zazula, Eric Plévin, “Decomposition of SEMG using non-linear LMS approach with higher-order cumulants,“ presentation at the project meeting Topical NEW Meeting on Signal Processing, Maribor, Slovenia, Feb. 23–24, 2002.

Božidar Potočnik, Damjan Zazula, T. Tomažič, “Image processing knowledge potential at the System Software Laboratory (ovarian follicle ultrasound image analysis),“ presentation at the project meeting SimBio, Jena, Germany, May 23–24, 2002.

Danilo Korže, “Die interaktive Netzkommunikation als neue Wissensquelle,” presentation at the international meeting on education Grenzen Überschreiten in Bildung und Schule, Klagenfurt, Austria, Sept. 19, 2002.

Aleš Holobar, “State of the art in Blind Source Separation,” presentation at the 4th FP5–NEW project topical meeting, Luzern, Switzerland, Sept. 20, 2002.


Dean Korošec, “Using XML for annotation and exchange of SEMG data,” lecture at the topic meeting (data processing) of European 5th FP project – NEW, Luzern, Switzerland, Sept. 20, 2002.

Dean Korošec, “CoLoS: Educational tools for medicine,” a part of invited plenary lecture, Portorož, Slovenia, Sept. 23, 2002.

Dean Korošec, “Distance Education Technologies,” keynote lecture at the seminar Distance Education Systems and their Application in BiH, Tuzla, Bosina and Herzegovina, Oct. 7, 2002.

Dušan Heric, Božidar Potočnik, “ST 7.4: Site independent evaluation and validation of the SimBio environment,” presentation on SimBio Project Meeting, Amines, France, Oct. 29, 2002.

Dean Korošec, “Why should markup languages be considered the primary option for creation of the electronic distance learning content?” presentation at the international meeting Informatologia 2002, Rogaška Slatina, Slovenia, Dec. 8, 2002.

Danilo Korže, “(2,1)-coloring of strong products of paths and cycles,” seminar at the Department of mathematics, Faculty of education, Maribor, Slovenia, Dec. 9, 2002.

Dean Korošec, “System data technologies: XML standard and application,” lecture at Tuzla, Bosnia and Herzegovina, Dec. 19, 2002.

Dean Korošec, “Streaming technology – introduction and concept,“ videoconference (IP) lecture for the Faculty of Education, University of Oulu, Finland, 2002.


Prof. Dr. Damjan Zazula: Programme committee chairman of The 15th IEEE Symposium on Computer-Based Medical Systems, Maribor, Slovenia, June 4–7, 2002.

Prof. Dr. Damjan Zazula: Reviewer for Signal Processing.

Prof. Dr. Damjan Zazula: Reviewer for IEEE Transactions on Biomedical Engineering.

Prof. Dr. Damjan Zazula, Dr. Dean Korošec:

Reviewers for International Journal of Medical Informatics.



Dr. Dean Korošec: Visit in the framework of the AREVIDERO project, Paolo Alto, United States, Mar. 25–29, 2002.

Dr. Dean Korošec: Visit at the Faculty of Electrical Engineering, University of Tuzla, Tuzla, Bosnia and Herzegovina, Oct. 6–10, 2002.

Dr. Dean Korošec: Visit at the Faculty of Electrical Engineering, University of Tuzla, visit, Tuzla, Bosnia and Herzegovina, Dec. 19–20, 2002.

GUESTS AND VISITORS

Cedric Fevotte (Ecole Centrale de Nantes, Nantes, France):

Study of convolutive mixtures and development of an optimal single auto-term search, research work, Jan. 14 to Feb. 11, 2002.

Thomas Rigabert, Sebastien Grigis (Ecole Centrale de Nantes, Nantes, France):

Research work in the fields of blind source separation and the decomposition of surface electromyograms using higher-order cumulants, Apr. 7 to July 7, 2002.


Aleš Holobar: 2nd Place Award for the best student paper, IEEE symposium on computer-based medical systems, Maribor, Slovenia, June 7, 2002.

Asst. Prof. Dr. Božidar Potočnik and System Software Laboratory: The Faculty Award for participation in the EU 5th Framework Programme with the SimBio-NAS project, Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia, Nov. 21, 2002.

CS - 38 Heterogeneous Computer Systems Laboratory

HETEROGENEOUS COMPUTER SYSTEMS LABORATORY

Head:

Asst. Prof. Dr. Milan Ojsteršek

Phone: +386 2 220 74 51


RESEARCH PROJECTS


Applied projects

SRAKA Portal "Sraka.com" (Sraka.com Portal)

Leader: Asst. Prof. Dr. Milan Ojsteršek Participants: Aleksander Kvas, MSc; Zlatko Čajič; Bojan Letnik; Borut Gorenjak;

Albin Bregant; Boštjan Šorgo; Ervin Schaffranietz; Branko Horvat

Financed by: Municipality of Maribor; Municipality of Koper; Municipality of Radovljica; Municipality of Sežana; Municipality of Kungota; Municipality of Oplotnica; University of Maribor, Faculty of Electrical Engineering and Computer Science Maribor; Nova KBM, d. d.; Ministry of the Information Society

Portal infrastructure facilitates creating, integrating, and management of information documents. This way, we can achieve higher efficiency of accessing such information since users spend less time to find, use, and analyse information. In addition, administrators spend less time with helping users. The basic features of portals are: documents management, information search, integration of application services and content within information system with external information systems, cross-referencing of content and services, providing collaboration services, information categorization, providing independence between data and its presentation in various media, multi-lingua information presentation, authentication and authorization of access to data and services and security consideration, and personalization and customisation. Portal is being updated with new functionality on a regular basis.

Heterogeneous Computer Systems Laboratory CS - 39

IPO-UD Razvoj integriranega programskega okolja za poučevanje in učenje na daljavo (Integrated software environment development for distance-teaching and distance-learning.)

Leader: Dejan Dinevski (University of Maribor) Participants: Asst. Prof. Dr. Milan Ojsteršek; Bojan Letnik; Borut Gorenjak; Albin

Bregant; Ervin Schaffranietz; Branko Horvat; Zvezdana Strmšek; Metka Zorič-Venuti, MSc; Tomaž Klojčnik; Dr. Aleš Časar; Ivan Gerlič; Asst. Prof. Dr. Matjaž Debevc; Brane Šmitek

Financed by: University of Maribor; Ministry of Education, Science and Sport of the Republic of Slovenia

The main goal of the project is pedagogical process modernization at University of Maribor by applying a distance-learning-enabled software. The project comprises infrastructure part to provide basic conditions for effective and efficient access of content and services for students, which should be enabled by distance-learning software. The software will be used by teaching staff and students of University of Maribor.

The software will facilitate work for the teaching staff for these tasks: entering multimedia study material for lectures and exercises, grading submitted works, exams, and seminars, communicating to students, knowledge examination and absence on lectures and exercises, access to academic core service, notification of students about results of their exames and exercises.

Students can achieve these goals: accessing multimedia material, checking knowledge gained for certain topic, which will be presented in study material, submitting their exercises and other works, accessing core academic service, communicating to pedagogical staff, getting notifications from teaching staff.

The software for distance-learning should provide: suitable authentication, personalization and authorization of accessing to content and services, support for multi-lingual and data presentation on various media (infoterminals, Internet, mobile phones, palmtops).

MMZ Maribor – mesto znanja (Maribor – Town of Knowledge)

Leader: Asst. Prof. Dr. Milan Ojsteršek Participants: Borut Gorenjak; Uroš Novak, MSc

Financed by: Municipality of Maribor, Human Resource Management Fund

Software, realized within the project, makes it possible to present educational opportunities in


the Maribor and Drava region on the Internet. This offer includes the possibilities for education, offered to members of the community by different companies, outside regular education. Data on educational opportunities is entered by interested organizations themselves by means of special software. Web application enables printout of data on educational activities (sorted by types of programme, by performers, by months, when educational activities are performed), search on educational activities (criteria is title, place, type of programme, date, performer, location) and search on performer (criteria is title and place). Data on educational activities, offered by others, can by downloaded to the computer of any person who is entering the data.

PUMD Portal Univerze v Mariboru za učenje na daljavo (Distance-Learning Portal of University of Maribor)

Leader: Dejan Dinevski (University of Maribor) Participants: Asst. Prof. Dr. Milan Ojsteršek; Bojan Letnik; Borut Gorenjak; Albin

Bregant; Ervin Schaffranietz; Branko Horvat; Zvezdana Strmšek; Metka Zorič-Venuti, MSc; Aleš Časar

Financed by: University of Maribor, Ministry of the Information Society

Universities world-wide are heading towards informatic support of study and distance-learning service provision. This way, classical study is facilitated. In addition, more people have access to university study. The project aims at building a portal, which provides employees and students with effective informatic support for study process and distance-learning. Distance-learning services should be accessed via various digital media (Internet, mobile phones with WAP capability, info terminals, palmtops, voice-recognition interfaces etc.). In addition, the portal will serve as communication system among university employees and students. The portal will contain digital library of study material, term dictionary, support system for lecturers, administration, and students.

SEPLS-S Izdelava strateškega plana informatizacije lokalnih skupnosti (Strategic Plan for Informatization of Local Communities)

Leader: Rado Lipovec (Municipality of Koper) Participants: Asst. Prof. Dr. Milan Ojsteršek, Branko Horvat, Katja Damij, Sašo

Novakovič, Roman Tomažič, Marjan Marušič, Boris Vuga Project partners: 3 PORT, informacijski inženiring, d. o. o.; Institut za projektni

management in informacijsko tehnologijo


Our goal is a strategic plan for informatization of local communities. The leader of the project is Municipality of Koper and works in cooperation of 3-Port company from Koper, IPMIT from Ljubljana and Faculty of electrical engineering and computer science (University of Maribor).


The strategic plan will base on the current IT status "snapshot" of local communities and will serve as a base for further activities on software development, which will enable e-commerce within local communities and between municipality and citizens, companies and administration of the state.

SPIMOM Izdelava strateškega plana informatizacije mestne uprave Mestne občine Maribor (Strategic Plan for Informatization of Municipality of Maribor)

Leader: Asst. Prof. Dr. Milan Ojsteršek


Our goal is to create a strategic information technology plan for the Municipality of Maribor. This plan will use current state of the municipality’s IT development to further activities by introducing electronic commerce and to devise a plan of software development in the future.

PO-OO Izdelava programske opreme za obveščanje občanov o njihovih zadevah (Software implementation for citizen notification of administration matters)

Leader: Rado Lipovec (Municipality of Koper) Participants: Asst. Prof. Dr. Milan Ojsteršek, Borut Gorenjak, Marjan Marušič,

Boris Vuga Project partners: Municipality of Koper


The aim of the project is software implementation of helping a citizen to be notified about any of his application progress via e-mail or SMS. A citizen can request also any other event notification concerning his matters with municipality administration. Data of a citizen are validated in reception room when delivering the request. A citizen can update his data via web browser with SIGEN-CA certificate.


DATELINE Design and Application of a Travel Survey for European Long-distance Trips Based on an International Network of Expertise

Leader: Asst. Prof. Dr. Milan Ojsteršek Participant: Branko Horvat


Financed by: Faculty for Civil Engineering, University of Maribor

The results of the European long-distance trip survey must be cleaned, transformed and integrated into common database. This was the base for preliminary data analysis to prove or reject the validity of certain data and acting upon it. The main goal of our project is provision of data in a suitable form and making them available under partly controlled condition for analysis and download. We employed an advanced Nesstar technology which is made exactly for social science surveys and representation. We should also support special analysis as presentation of trips according to source and destination. A complete presentation of the project should also be made.

A broader project has a code 2000-AM.10016 and is a part of 5th Framework Programme of European Commission: "Competitive and Sustainable Growth".

PUBLICATIONS

Milan Ojsteršek, Borut Gorenjak, Andrej Krajnc, Navodila za program "Znanje 2.0". Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science, Heterogeneous Computer Systems Laboratory 2002.

Uroš Novak, Milan Ojsteršek, Zlatko Čajić, “Experimental XSLT processor for objects,” IASTED International Conference Applied Informatics, Innsbruck, Austria, Feb. 2002, pp. 277–282.

Zlatko Čajić, Milan Ojsteršek, Branko Horvat, “Horizontal services in web portals,” Mobile open society through wireless telecommunications conference MOST, M. Muraszkiewicz, Poland, Oct. 2002, pp. 16–17.

Aleksander Kvas, Milan Ojsteršek, “Statično razvrščanje na večprocesorski računalniški arhitekturi s simultano večnitnostjo,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 39–42.

Borut Gorenjak, Milan Ojsteršek, Bojan Letnik, Albin Bregant, “Izdelava portala Fakultete za elektrotehniko, računalništvo in informatiko,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 151–154.

Branko Horvat, Zlatko Čajić, Milan Ojsteršek, “Personalizacija in spletno rudarjenje,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 229–232.


Zlatko Čajić, Ervin Schaffranietz, Uroš Novak, Milan Ojsteršek, “Ogrodje za avtomatsko persistenco komponent v relacijski podatkovni bazi,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 95–99.

Milan Ojsteršek, Zlatko Čajić, Uroš Novak, Borut Gorenjak, Bojan Letnik, “Kako zgraditi e-občino?,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 217–222.

Milan Ojsteršek, Borut Gorenjak, Bojan Letnik, “Kako zgraditi e-občino s portalom centra za heterogeno procesiranje,” E-uprava za boljšo upravo INDO 2002, Portorož, Slovenia, Dec. 2002, pp. 45–51.

Milan Ojsteršek, “Kako zgraditi e-občino s portalom centra za heterogeno procesiranje?,” Zbornik ponudnikov e-storitev za lokalne skupnosti, Maribor, Slovenia, June 2002, pp. 29–30.


Milan Ojsteršek, “Informacijski sistem FERI v funkciji izobraževanja na daljavo,“ lecture at the symposium 3. Trstenjakovi dnevi, Človek – Tehnika – Izobraževanje, Gornja Radgona, Slovenia, Mar. 16, 2002.

CS - 44 Geometric Modelling and Multimedia Algorithms Laboratory

GEOMETRIC MODELLING AND MULTIMEDIA ALGORITHMS LABORATORY

Head:

Assoc. Prof. Dr. Borut Žalik

Phone: +386 2 220 74 71


RESEARCH PROJECTS



VVME Visualization of Volume Data in Medical Environment

Leaders: Assoc. Prof. Dr. Borut Žalik, László Szirmay-Kalos (Technical University of Budapest)

Participants: Matej Gomboši, MSc; Gregor Klajnšek; Sebastian Krivograd; Dr. David Podgorelec

Project partner: Technical University of Budapest

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Government of Republic of Hungary

Scientific visualisation has become a fast growing area with applications in different engineering areas. One of the most active research subfields is volume rendering with applications in medical visualisation, geological applications, computational fluid dynamics and elsewhere. Our work is particularly oriented to biomedical sciences, which are among the most interesting disciplines, while Computerised Tomography (CT), and Magnetic Resonance Imaging (MRI) produce 2D images (slides), which are today used extensively in diagnostic and education. We have contacts with the radiology department of the Hospital of Maribor, which is seriously interested in a computer environment enabling efficient observation of 3D models, obtained from the sequences of slides. Namely, a 3D model gives much more information to an observer than a set of slides. Main goals of the project are common publications in international journals and at international scientific conferences, eventual help to the Hospital of Maribor by providing it an efficient software package for medical data

Geometric Modelling and Multimedia Algorithms Laboratory CS - 45

visualisation on PC, and the third goal is to facilitate our incorporation in the related European projects.


Applied project

PmcXML Uporaba standarda LandXML in razširitev PmcXML (Use of the LandXML Standard and the PmcXML Extension)

Leader: Assoc. Prof. Dr. Borut Žalik Participant: Matej Gomboši, MSc

Financed by: Faculty for Civil Engineering, University of Maribor

Duration: Jan. to Mar. 2002

The project goal was to support the exchange of geographical data in PmcXML format by constructing a new interface. This enables standardized archival of data and exchange between different users. PmcXML is based on LandXML standard, which represents an extensible XML language. It was designed for informatization of civil engineering and survey data used in construction and transportation industries. It enables transfer of engineering data between suppliers and users, and provides a format suitable for long term archiving and a standard format for electronic exchange of design data. LandXML enables description of spatial elements as roads, parcels, digital terrain models including accompanying infrastructure. We have extended LandXML specification with additional elements to obtain a new specification named PmcXML.


15257002-2002 Source Code for Geometric Buffer

Leader: Assoc. Prof. Dr. Borut Žalik Participant: Mirko Zadravec

Duration: Jan. to Mar. 2002

The algorithm for construction of geometric outlines works in seven steps. To speed up the algorithm, the sweep-line technique is employed. A theoretical estimation of the worst time complexity gives O(n2 log n), where n is the number of input vectors. However, the expected time complexity is very close to O(n log n), what is confirmed by the experiments. The algorithm was proved stable and efficient in practice (also in comparison to an algorithm from


the ArcView environment). It was implemented in Visual C++ and Delphi Pascal.

An example of geometric outline of set of line segments and polylines.

Valvazor/ALIS ALIS 63

Application of Computational Geometry in Visualisation of Medical Data

Leaders: Assoc. Prof. Dr. Borut Žalik, Gordon Clapworthy (De Montfort University)

Participants: Dr. David Podgorelec; Matej Gomboši, MSc Project partner: De Montfort University

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; The British Council Slovenia


Visualisation of medical data deals with a huge amount of data obtained from different medical devices. This data has normally been presented to radiologists as two-dimensional "slices". Nowadays, the data contained in the slices are frequently synthesised with the aid of computer graphics, so that the anatomical structures can be displayed in three-dimensional form. This use of computer graphics enables the three-dimensional relationships between various organs and their pathologies to be displayed, providing much greater awareness of


the spatial features of the organs displayed. Besides the algorithms from computer graphics, techniques developed in computational geometry are also needed. For example, Voronoi diagrams can be used to locate rapidly the nearest healthy cells when regarding those cells infected by some illness. The expertise of the Slovene group in geometric modelling has enabled development of more economical algorithms to enhance the work of the UK group. In return, the Slovene group has gained expertise in medical visualisation which is currently not widely undertaken in Slovenia.

PUBLICATIONS

Ivana Kolingerova, Borut Žalik, “Improvements to randomized incremental Delaunay insertion,” Comput. graph., No. 26, pp. 477–490, 2002.

Sebastian Krivograd, Borut Žalik, Franc Novak, “TriMeDeC tool for preparing visual teaching materials based on triangular networks,” Comput. appl. eng. educ., Vol. 10, pp. 144–154, 2002.

David Podgorelec, “A new constructive approach to constraint-based geometric design,” Comput. Aided Des., Vol. 34, pp. 770–785, 2002.

Sebastian Krivograd, Borut Žalik, Franc Novak, “Triangular mesh decimation and undecimation for engineering data modelling,” Inf. MIDEM, Vol. 32, No. 3, pp. 219–223, Sept. 2002.

Branko Kaučič, Borut Žalik, “Correction of lower bound for guarding polyhedral terrains,” Contrib. geom. model. multimed., Vol. 2, No. 1, pp. 1–11, 2002.

Borut Žalik, David Podgorelec, Sebastian Krivograd, Gregor Klajnšek, Mirko Zadravec, “Trapezoid polygon decomposition,” Contrib. geom. model. multimed., Vol. 2, No. 2, pp. 1–25, 2002.

Marko Lamot, Borut Žalik, “An efficient simple polygon triangulation algorithm based on a uniform plane subdivision,” Contrib. geom. model. multimed., Vol. 2, No. 3, pp. 1–27, 2002.

David Podgorelec, Borut Žalik, “Explicit feature recognition from boundary representation,” Contrib. geom. model. multimed., Vol. 2, No. 4, pp. 1–23, 2002.

Branko Kaučič, Borut Žalik, “A new approach for vertex guarding of polyhedral surfaces,” Contrib. geom. model. multimed., Vol. 2, No. 5, 16 pp., 2002.


Matej Gomboši, Borut Žalik, “Comparing two sets of polygons in land cadastre,” Contrib. geom. model. multimed., Vol. 2, No. 6, pp. 1–24, 2002.

Branko Kaučič, Borut Žalik, “K-guarding of polyhedral terrain,” Contrib. geom. model. multimed., Vol. 2, No. 7, 12 pp., 2002.

Borut Žalik, Sebastian Krivograd, “Compression of triangular meshes processing two triangles at the same time,” Contrib. geom. model. multimed., Vol. 2, No. 8, pp. 1–23, 2002.

Branko Kaučič, Borut Žalik, “A new approach for vertex guarding of planar graphs,” CIT. J. Comput. Inf. Technol., Vol. 10, No. 3, pp. 189–194, Sept. 2002.

David Podgorelec, Marko Vinter, Borut Žalik, “Pristop k vizualizaciji podatkov na osebnem računalniku,” Inform. med. slov., Vol. 7, No. 1, pp. 31–45, 2002.

Borut Žalik, Mirko Zadravec, David Podgorelec, Računalniške periferne naprave in uporabniški vmesniki: učbenik. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science 2002.

Matej Gomboši, “Containment test for polygons containing circular arcs,” 20th Eurographics UK Conference, Leicester, Great Britain, June 2002, pp. 112–119.

Sebastian Krivograd, Borut Žalik, “Compression of triangulation mesh topology in 2.5D,” East-West-Vision 2002, Vienna, Austria, Bd. 163, pp. 137–142.

Gregor Klajnšek, Borut Žalik, “An algorithm for near-optimal scheduling of sessions for GPS survey,” East-West-Vision 2002, Vienna, Austria, Bd. 163, pp. 265–266.

Smiljan Šinjur, Riko Šafarič, Borut Žalik, “A JAVA collision detection for a WEB-based robot,” 11th International Workshop on Robotics in Alpe-Adria-Danube Region RAAD 2002, Balatonfüred, Hungary, July 2002, pp. 223–228.

Branko Kaučič, Borut Žalik, “An overview of visibility problem algorithms in 1,5D,” 10-th International Conference in Central Europe on Computer Graphics, Visualisation and Computer Vision WSCG '02, Plzen, Czech Republic, Feb. 2002, pp. 241–247.

Branko Kaučič, Borut Žalik, “Comparison of view shed algorithms on regular spaced points,” Spring conference on computer graphics SCCG 2002, Budmerice, Slovakia, Apr. 2002, pp. 177–183.


David Podgorelec, Gregor Klajnšek, Borut Žalik, “PC-based volume renderer by using visible voxel list,” Fifth international scientific conference Electronic computers and informatics '02, Košice - Herl'any, Slovakia, Oct. 2002, pp. 317–322.

Mirko Zadravec, Borut Žalik, David Podgorelec, “An algorithm for constructing geometric buffers of simple polygons,” Fifth international scientific conference Electronic computers and informatics '02, Košice - Herl'any, Slovakia, Oct. 2002, pp. 328–333.

Branko Kaučič, Borut Žalik, “A new approach for vertex guarding of planar graphs,” 24th International Conference on Information Technology Interfaces ITI 2002, Cavtat, Croatia, June 2002, pp. 417–422.

David Podgorelec, Borut Žalik, “An open system for constraint-based geometric design,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 27–30.

Gregor Klajnšek, David Podgorelec, “Pristop k vizualizaciji podatkov na osebnem računalniku,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 131–134.

Sebastian Krivograd, Borut Žalik, David Podgorelec, Matej Gomboši, “Vizualizacija velikih količin 3D podatkov na Internetu,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 37–41.

Borut Žalik, “Geografski informacijski sistemi kot povezovalni člen heterogenih podatkov,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 121–125.


Sebastian Krivograd, Gregor Klajnšek, “Research projects of GEM2A,” invited lecture at the Department of Control Engineering and Information Technology of the Budapest University of Technology and Economics, Budapest, Hungary, June 20, 2002.


Gregor Klajnšek, Dr. David Podgorelec:

Insight to the projects of Research Center for Virtual Reality and Visualization TU Graz, interesting for eventual future collaboration, Graz, Austria, May 28, 2002.


Gregor Klajnšek, Sebastian Krivograd:

Visit within bilateral project VVME – Visualization of Volume Data in Medical Environment, Budapest, Hungary, June 16–23, 2002.

Gregor Klajnšek: Visit within bilateral project VVME – Visualization of Volume Data in Medical Environment, scientific collaboration, Budapest, Hungary, Dec. 9–16, 2002.

GUESTS AND VISITORS

Ante Graovac (Ruđer Bošković Institut, Zagreb, Croatia):

Insight into the lab projects because of the eventual collaboration in the future, Apr. 24, 2002.

Gabriel César Ferreira Pestana (University of Madeira, Madeira, Portugal):

Visit within the Socrates–Erasmus program, May 7, 2002.

Andrej Ferko (Comenius University Bratislava, Bratislava, Slovakia):

Insight to the lab projects because of the future collaboration, May 16, 2002.

Laszlo Szecsi, Balázs Csébfalvi (Technical University of Budapest, Budapest, Hungary):

Visit within the bilateral project VVME. Presentations "Interactive Volume-Rendering Techniques for Medical Data Vizualization" and "Global Illumination Project," Oct. 20–27, 2002.

László Szirmay-Kalos (Technical University of Budapest, Budapest, Hungary):

Visit within the bilateral project VVME, Nov. 20–27, 2002.

Konrad Karner, Cristopher Zach (Graz University of Technology, Graz, Austria):

Insight to the lab projects interesting for the future collaboration. Presentations: "MetropoGIS: A City Modeling System" (prof. Karner Konrad) and "Urban Data Visualization" (Cristopher Zach), Dec. 16, 2002.

Institute of Informatics IN – 1

INSTITUTE OF INFORMATICS

Head:

Prof. Dr. Ivan Rozman

Phone: +386 2 235 51 00


URL: http://www.in.feri.uni-mb.si/

The informatics study program covers the relevant aspects of information sciences, including information systems development, algorithm analysis and design, data structures, database design, software engineering, analysis, design and architectures of information systems, object technology and component based development, web services, enterprise collaboration, intelligent systems design, software quality management and security. Graduates pursue careers in the fields of software engineering, design and maintenance of information systems, intelligent systems, databases and security.

The research work by the members of the Institute is focused on several fields of software engineering with special emphasis on object-oriented methods and tools, information systems design, intelligent systems supporting system engineering activities, expert systems design, database design, security implementation and design and implementation of software quality management methodologies.

From the school year 2002/2003 the Institute of informatics is also teaching and research base for the new study program Media Communication. This is an interdisciplinary study, which covers different fields from radio and TV production, informatics and computer science as well as graphic communication.

IN – 2 Institute of Informatics

The educational and research activities of the Institute are divided into four laboratories.

Information Systems Laboratory

Head: Prof. Dr. Ivan Rozman

Employees: Asst. Prof. Dr. Marjan Heričko; Assoc. Prof. Dr. Bojan Novak; Davor Bonačić, MSc; Asst. Prof. Dr. Romana Vajde Horvat; Asst. Prof. Dr. Branko Matjaž Jurič; Asst. Prof. Dr. Vili Podgorelec; Aleš Živkovič, MSc; Simon Beloglavec, BSc; Tomislav Rozman,

Information Systems

Laboratory Head:


Database Technologies

Laboratory Head:

Assoc. Prof. Dr. Tatjana Welzer Družovec

Computer Mediated Communication

Laboratory Head:

Prof. Dr. József Györkös

Real-Time Systems

Laboratory Head:

Prof. Dr. Matjaž Colnarič

Institute of Informatics Head:


Institute of Informatics IN – 3

BSc; Katja Harej, BSc; Gregor Polančič, BSc; Boštjan Kežmah, BSc; Boštjan Šumak, BSc; Maja Pušnik, BSc; Miha Strehar

Database Technology Laboratory

Head: Assoc. Prof. Dr. Tatjana Welzer Družovec

Employees: Boštjan Brumen, BSc; Izidor Golob, MSc; Katja Udir, BA; Aleš Vrabič

Computer Mediated Communication Laboratory

Head: Prof. Dr. József Györkös

Employees: Andrej Bregar, MSc; Boris Lahovnik, BSc

Real-Time Systems Laboratory

Head: Prof. Dr. Matjaž Colnarič

Employees: Asst. Prof. Dr. Domen Verber; Dr. Roman Gumzej; Dr. Matej Šprogar; Stanislav Moraus, BSc; Bojan Hadjar, Ing.; Rok Ostrovršnik, BSc

IN - 4 Information Systems Laboratory

INFORMATION SYSTEMS LABORATORY

Head:


Phone: +386 2 235 51 00


RESEARCH PROJECTS



MEVSVKID Metodologija enotnega vzpostavljanja sistemov vodenja kakovosti v informacijski družbi (Methodology for Unified Quality Management System Establishment in Information Society)

Leader: Asst. Prof. Dr. Romana Vajde Horvat Participants: Asst. Prof. Dr. Romana Vajde Horvat; Prof. Dr. Ivan Rozman; Katja

Harej; Tomislav Rozman; Gregor Polančič; Boštjan Brumen; Boris Lahovnik; Davor Bonačić, MSc

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Ministry of the Information Society

This project is financed within the Slovenian program “Competitive position of Slovenia in 2001–2006”. Goals of the project are: – development of methodology for process description and description of their relationships in

a notation which will be suitable for any organization in information society – development of methodology for establishment of Quality Management System within any

organization in information society – verification of developed methodology in specific organization (governmental organization),

and – dissemination of the methodology (within governmental organizations and broader).

Information Systems Laboratory IN - 5

Industrial projects

MA MA (Mobitelova akademija) (MA (Mobitel Academy))

Leader: Prof. Dr. Ivan Rozman Participants: Asst. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič;

Aleš Živkovič, MSc; Simon Beloglavec; Asst. Prof. Dr. Romana Vajde Horvat

Financed by: MOBITEL, telekomunikacijske storitve, d. d.

We have collaborated by defining a design and program of Mobitel academy and by organizing creative workshops, study workshops and educational workshops for external and internal participants on the subject related to the application development and development of new services with JAVA technologies and quality management systems.

PIA-ISDM Projekt PIA-ISDM Postavitev integralne arhitekture informacijskega sistema družbe Mobitel d.d (Project PIA-ISDM Setting an integral architecture of the MOBITEL IS)

Leader: Prof. Dr. Ivan Rozman Participants: Prof. Dr. Ivan Rozman; Asst. Prof. Dr. Marjan Heričko; Asst. Prof.

Dr. Branko-Matjaž Jurič; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah; Boštjan Šumak; Igor Novak; Miha Strehar

Financed by: Razvojni center IRC Celje, d. o. o., Slovenia

The Laboratory of Informatics participated with the research and design of an integral architecture of information system, a part of a larger project, which is performed by the “Development center IRC Celje, d. d. o.,” FERI Maribor and FRI Ljubljana for the needs of the Mobitel company. The basic goal of the project is to reengineer the existing IS in order to meet requirements of efficient e-business, focused on creating open integral information architecture, using modern technologies such as J2EE, XML and web services.

TPS COBISS Tehnološka prenova sistema COBISS (Technological Reengineering of COBISS System)


Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Romana Vajde Horvat; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah; Boštjan Šumak; Miha Strehar; Maja Pušnik


Financed by: IZUM

Institute of Informatics ensures advisement services, object technology education and qualifications and quality for the needs of COBISS information system reengineering respectively COBISS 3 information system reengineering. In the project, the content related to information system development in Java, distributed object architectures, unified modelling language (UML), and object process models, was treated. Other more important goals of collaboration are creating standard procedure and reestablishment of quality management system. In the project, the Institute of Informatics has researched certain parts of the remote method evocation security in more detail and searched for suitable solutions through the pilot solutions development.

IAZZPB SIST Izvedba analize zahtev za podatkovno bazo SIST (Requirements analysis for SIST database)

Leader: Prof. Dr. Ivan Rozman Participants: Asst. Prof. Dr. Romana Vajde Horvat, Gregor Polančič, Tomislav

Rozman, Katja Harej, Assoc. Prof. Dr. Tatjana Welzer Družovec, Štefan Masič

Financed by: Slovenian Institute for Standardization

The two main goals of the project are requirements analysis for an information system which would support the standardization processes of SIST, and review of the applicability of different DBMS according to the specifics of standardization processes. The project will be conducted in the following phases:

Phase 1: Analysis of standardization processes within SIST, based on a review of the current state and use of the information technology support.

Phase 2: The development of a conceptual model of SIST database and description of required functionality of the information system to support standardization processes.

Phase 3: Analysis of the applicability of commercial DBMS (Oracle and LotusNotes environment).

Results of the project will be: conceptual model of SIST database and report of the DBMS analysis.

ŠI Šola informatike (Slovenian Information Technology School)


Aleš Živkovič, MSc; Irena Žerko


Financed by: SRC.SI, d. o. o.

The SRC, d. o. o. organizes an Information Technology School, whose main goal is to educate about information technology related issues in the area of Slovenia. The Laboratory of Information Systems cooperates with this school in an important subject – Object Technology. SRC organizes the workshops and seminars, and the Laboratory of Information Systems is responsible for the content of the educational activities.

POT Prehod na objektno tehnologijo (Transition to Object Technology)


Aleš Živkovič, MSc; Simon Beloglavec; Miha Strehar; Boštjan Šumak

Financed by: Nova KBM, d. d.

The Object Technology Center assists the technological evaluation of pilot projects for the component-based development of Web object applications using object modelling (UML), distributed objects, CORBA, Java, JavaBeans and Enterprise JavaBeans, object-relational database management systems, object transaction monitors, and networked computers. In addition, special attention is paid to establishing a defined and systematic object-oriented software development process.



Leaders: Assoc. Prof. Dr. Tatjana Welzer Družovec, Lorenzo Moreno Ruiz (Centro Superior de Informatica Universidad de La Laguna)

Participants: Prof. Dr. Peter Kokol, Marjan Družovec, Prof. Emeritus Dr. Bruno Stiglic, Boštjan Brumen, Dr. Špela Hleb-Babič, Asst. Prof. Dr. Milan Zorman, Asst. Prof. Dr. Vili Podgorelec


Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Ministry of Foreign Affairs of the Kingdom of Spain, European Union

Within the project we will study the simulation of hospital management. The basis of the simulation will be a data base containing data of administration, sources, schedules, employees, etc. Second part of the project represents a system for diagnosing Alzheimer


disease based on the analysis of EEG signals. This analysis will be performed with the use of the symbolic description of EEG signal, soft automata, statistical analysis, and neural networks.

TEAMWork IST-2000-28162

Technology Exploitation and Adaptable Methodologies offering new Organisational Models and Practices for e-Working Teams

Leader: Prof. Dr. Ivan Rozman Participants: Asst. Prof. Dr. Romana Vajde Horvat, Assoc. Prof. Dr. Tatjana

Welzer Družovec, Gregor Polančič, Tomislav Rozman, Regina Stajnko, Boštjan Brumen, Katja Harej


The main goal of the project is to verify and disseminate the BestregIT methodology (developed within previous EU projects and aims to model the organization’s mission, structure and process workflow) and NQA environment (which enables the automatization of workflow and document management). Both, BestregIT and NQA, have been introduced to members of the project team. Within the second part of the project, University of Maribor team modelled the Socrates Erasmus student exchange process. Further, the model will be supported within NQA and verified and used within a test group of users. Other process models for cooperation of different partners within EU projects and for the cooperation of research institutions will be developed, as well as model for software development support. The results of the project will be disseminated within the broader community. There are 14 partners working within the project. The budget of the project is 1.2 million euro.


Applied project

L2-0841-0796-99 Adaptivno modeliranje programskih procesov in njihova implementacija (Adaptive Modelling and Implementation of Software Process)

Leader: Prof. Dr. Ivan Rozman Participants: Prof. Dr. Jozsef Györkös; Prof. Emeritus Dr. Bruno Stiglic; Assoc.

Prof. Dr. Tatjana Welzer Družovec; Asst. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Domen Verber; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Romana Vajde Horvat; Davor Bonačić, MSc; Simon Beloglavec; Dr. Tomaž Domajnko; Boris Lahovnik; Robert T. Leskovar; Miha Strehar; Rado Jensterle; Ljiljana Pretnar; Marko Klemenčič


Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; RRC – Računalniške storitve; GENIS, d. o. o.; Center vlade za informatiko

Duration: 1999 to 2002

The goal of this research project is the development of a methodology for the formal definition and continuous improvement of the software process. This developed methodology, together with the knowledge and experience gained in quality systems establishment, will be used for the development of an integral environment, which will support software process implementation. Together with the development of an integrated tool, we also study the usage of modern object-oriented tools and techniques, object databases, and distributed processing.


ZUUOTIKR Zagotovitev uspešne uporabe objektne tehnologije in komponentnega razvoja (Ensuring Successful Usage of Object Technology and Component Development)


Dr. Tomaž Domajnko; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah; Miha Strehar; Boštjan Šumak; Igor Novak

Financed by: RRC – Računalniške storitve

Duration: Oct. 2000 to Apr. 2002

The goals of collaboration are connected with the successful usage of object technology and component development in the following priority areas: the development of modern, web-based applications, component model deployment and legacy systems integration, and successful management of reuse. In this purpose, the institute of Informatics prepared and executed seminars/workshops, thematically connected with object technology and component development, object modelling, UML, object development process, distributed objects, component models, Java, Java beans, HTML, XML, security, mobile business and WAP, object-relational databases, SQL, and reuse through patterns.


Industrial projects

PZOOTIKR Posredovanje znanja o objektni tehnologiji in komponentnem razvoju (Knowledge Dissemination on Object Technology and Component Based Development)


Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah; Maja Pušnik

Financed by: Infonet, d. o. o.

Duration: Oct. 2000 to Apr. 2002

The aim of this project is collaboration in education and knowledge dissemination in object technology and component based development. The knowledge transfer will take place in the form of workshops.

VOTIKR Vpeljava objektne tehnologije in komponentnega razvoja (Object Technology and Component Development Initiation)


Aleš Živkovič, MSc; Simon Beloglavec; Miha Strehar; Boštjan Šumak



The goals of our collaboration are the initiation of object technology and component development in Razvojni center IRC Celje, d. o. o. and the corresponding education process. The performer will develop custom based seminar workshops, in the following topics: introduction to object technology and component development, introduction to Java, object modelling with UML, object development process, component models and distributed objects CORBA.

SPISD Strategija prenove informacijskega sistema družbe Etol, d.d. (Strategy for information system reengineering in Etol, d.d.)



Dr. Branko-Matjaž Jurič; Boštjan Kežmah; Maja Pušnik; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Šumak


Duration: Sept. to Nov. 2002

The Institute of informatics has collaborated by composing studies and modernization strategies of Etol company information system, especially at defining guidelines for IS modernization and evaluation of different execution variants for modernization.

SIPRPO Svetovanje in pomoč pri razvoju programske opreme (04/2001 – 05/2002) (Advisement and assistance at software development (04/2001 – 5/2002))


Asst. Prof. Dr. Romana Vajde Horvat; Aleš Živkovič, MSc; Simon Beloglavec

Financed by: Telekom Slovenia

Duration: Jan. to May 2002

Preparation and execution of advisement and education on the subject of object development and java technologies for the needs of the Telekom project group members, which took part on the project CENIKI.

e-Prijave (e-applications)


Aleš Živkovič, MSc; Simon Beloglavec; Igor Novak; Boštjan Šumak

Financed by: Zavod za zdravstveno zavarovanje Slovenije

Duration: Dec. 2001 to Apr. 2002

The Laboratory of Informatics collaborated on the ZZZS e-application project (electronically intervened applications and changes for obligatory health, pension or disability insurance). It was responsible for architecture design alternatives and implementation of two JAVA components for XML document processing. The main stress was on applying modern technologies and tools, related to XML, Java and other technologies such as XML Schema, DTD, DOM, SAX, XSL, Java 2 Enterprise Edition platform, servlets, JSP, EJB, JCE and also


SOAP, UDDI and WSDL.

PUBLICATIONS

Matjaž B. Jurič, “Integrate EJBs with CORBA: access EJBs from non-Java-based applications,” Java world, 14 pp., Mar. 2002.

Matjaž B. Jurič, “J2EE as the platform for EAI: supporting open-standard technologies,” JAVA dev. j., Vol. 7, Issue 3, 13 pp., 2002.

Matjaž B. Jurič, Ivan Rozman, “J2EE for EAI: transactions, security, naming, performance, and Web services,” JAVA dev. j., Vol. 7, Issue 4, 16 pp., 2002.

Vili Podgorelec, Peter Kokol, “Evolutionary induced decision trees for dangerous software modules prediction,” Inf. process. lett., Vol. 82, pp. 31–38, 2002.

Vili Podgorelec, Peter Kokol, Bruno Stiglic, Ivan Rozman, “Decision trees: an overview and their use in medicine,” J. med. syst., Vol. 26, No. 5, pp. 445–463, Oct. 2002.

Matjaž B. Jurič, Marjan Heričko, “J2EE, EAI, & Web services,” Web services journal, Vol. 2, Issue 5, pp. 32–38, May 2002.

Matjaž B. Jurič, “EAI and Web services,” eAI journal, pp. 31–35, July 2002.

Boštjan Brumen, Izidor Golob, Tatjana Welzer, Ivan Rozman, Marjan Družovec, Hannu Jaakola, “Data protection for outsourced data mining,” Informatica (Ljublj.), Vol. 26, No. 2, pp. 205–210, 2002.

Maja Pušnik, Matjaž B. Jurič, Ivan Rozman, “Evaluation of technologies for business process automation,” Informatica (Ljublj.), Vol. 26, No. 4, pp. 373–380, 2002.

Robert T. Leskovar, József Györkös, Ivan Rozman, “Gradnja hierarhične strukture konceptov iz nestrukturiranih tekstovnih dokumentov,” Uporab. inform. (Ljubl.), Vol. 10, No. 2, pp. 102–112, 2002.

Aleš Živkovič, Marjan Heričko, Ivan Rozman, “Vpeljava poslovnega modeliranja in primerov uporabe za uspešnejše izvajanje programskih projektov,” Organizacija (Kranj), Vol. 35, No. 5, pp. 312–319, May 2002.

Matjaž B. Jurič, “Spletne storitve in ebXML,” Sistem (Ljubl.), pp. 32–34, Nov. 2002.


Romana Vajde Horvat, “Svetovalci – kako jih izbrati/kako se predstaviti?,” Kakovost, No. 3, pp. 13–15, Oct. 2002.

Romana Vajde Horvat, Katja Harej, Tomislav Rozman, Gregor Polančič, Ivan Rozman, “Novice iz SIST: informacijska podpora dela standardizacijske hiše,” Sporoč. – Urad Repub. Slov. stand. merosl., Vol. 12, No. 5, pp. 13–16, 2002.

Craig A. Berry, John Carnell, Matjaž B. Jurič, Meeraj Moidoo Kunnumpurath, Nadia Nashi, Sasha Romanosky, J2EE design patterns applied. Birmingham: Wrox Press cop. 2002.

Matjaž B. Jurič, Adil Rehan, Andy Olsen, Eric Lippert, Visual Basic .NET serialization handbook. Birmingham: Wrox Press cop. 2002.

Boštjan Brumen, Tatjana Welzer-Družovec, Hannu Jaakkola, Izidor Golob, Ivan Rozman, “Towards cost-effective construction of classification methods,” Information modelling and knowledge bases XIII (Frontiers in artificial intelligence and applications), Amsterdam, Vol. 73, pp. 301–306.

Vili Podgorelec, Peter Kokol, Ryuichi Yamamoto, Gou Masuda, Norihiro Sakamoto, “Medical knowledge extraction via hybrid decision trees,” Information modelling and knowledge bases XIII (Frontiers in artificial intelligence and applications), Amsterdam, Vol. 73, pp. 390–397.

Matevž Rostaher, Marjan Heričko, “Tracking test first pair programming – an experiment,” Second XP Universe and first Agile Universe Conference Extreme programming and agile methods XP/Agile Universe 2002, Chicago, USA, Aug. 2002, pp. 174–185.

Peter Kokol, Vili Podgorelec, Milojka Molan Štiglic, “Searching for new patterns in medical data with evolutionary programming,” Annual Symposium of the American Medical Informatics Association, San Antonio, USA, Nov. 2002, pp. 1067.

Maurizio Pighin, Vili Podgorelec, Peter Kokol, “Program risk definition via linear programming techniques,” Eighth IEEE Symposium on Software Metrics, Ottawa, Canada, June 2002, pp. 197–202.

Vili Podgorelec, Peter Kokol, Ivan Rozman, “AREX – Classification rules extracting algorithm based on automatic programming,” 15th European conference on artificial intelligence ECAI 2002, Lyon, France, July 2002, pp. 330–334.

Vili Podgorelec, Ivan Rozman, “Classification of patients with Alzheimer disease with automatic programming,” 2nd European medical & biological engineering conference EMBEC '02, Vienna, Austria, Dec. 2002, Vol. 3, pp. 698–699.


Marjan Družovec, Tatjana Welzer, Boštjan Brumen, “Handling extensive medical data,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 7 pp.

Vili Podgorelec, Peter Kokol, Ivan Rozman, “Autonomous agents for classification in health care,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 7 pp.

Vili Podgorelec, Peter Kokol, Ivan Rozman, Werner Brunck, “Intelligent software engineering using logistic maps,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 5 pp.

Tatjana Welzer, Boštjan Brumen, Marjan Družovec, Matjaž B. Jurič, “Autonomous system for increasing the quality of medical data,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 5 pp.

Srečko Kovačič, Gorazd Bunc, Bojan Novak, Simona Strnad, “A computer image analysis of vasospasm and DBH immunoreactivity after experimental subarachnoid haemorrhage in rabbits,” The Sixth Joint Meeting of The Japan Society of Histochemistry and Cytochemistry and The Histochemical society, Seattle, pp. 55–56.

Ivan Rozman, Matjaž B. Jurič, Marjan Heričko, Ivan Vezočnik, Peter Tevž, Marjan Krisper, “Improving mobile operator information system efficiency through EAI,” Business information technology management: facilitating global IS assiances, 18 pp.

Matjaž B. Jurič, Bojan Kraut, “ebXML in insurance software,” XML Europe 2002, Barcelona, Spain, May 2002, 24 pp. (PPT).

Ivan Rozman, Matjaž B. Jurič, “Primenenie integracii na predprijatii dlja effektivnogoe-biznesa,” 6. meždunarodnaja konferencija Informacionnoe obščestvo, intellektual'naja obrabotka informacii, informacionnye tehnologii NTI-2002, Moscaw, Russia, Oct. 2002, pp. 292–296.

Robert T. Leskovar, József Györkös, Ivan Rozman, “A decompositional approach to content structuring,” Savjetovanje Računala u tehničkim inteligentnim sustavima MIPRO 2002, Opatija, Croatia, May 2002, pp. 31–36.

Gregor Polančič, Romana Vajde Horvat, Tomislav Rozman, Ivan Rozman, Katja Harej, “A comprehensive view of building a website,” 13th International Conference on Information and Intelligent Systems IIS 2002, Varaždin, Croatia, Sept. 2002, pp. 141–148.


Tomislav Rozman, Romana Vajde Horvat, Ivan Rozman, Gregor Polančič, Katja Harej, “Lowering infrastrucure costs for web application deployment platform,” 13th International Conference on Information and Intelligent Systems IIS 2002, Varaždin, Croatia, Sept. 2002, pp. 149–154.

Boštjan Kežmah, Ivan Rozman, “The potential of web services in ERP business networks,” 13th International Conference on Information and Intelligent Systems IIS 2002, Varaždin, Croatia, Sept. 2002, pp. 193–201.

Tatjana Welzer, Boštjan Brumen, Izidor Golob, Marjan Družovec, “Medical diagnostic and data quality,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 97–101.

Boštjan Brumen, Tatjana Welzer Družovec, Marjan Družovec, Izidor Golob, Hannu Jaakkola, “Protecting medical data for analyses,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 102–107.

Vili Podgorelec, Peter Kokol, Milojka Molan Štiglic, “Searching for new patterns in cardiovascular data,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 111–116.

Vili Podgorelec, Marjan Heričko, Branko-Matjaž Jurič, Ivan Rozman, “Testing reliability of medical software,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 185–190.

Matjaž B. Jurič, Ivan Rozman, Tatjana Welzer, Marjan Heričko, Boštjan Brumen, Vili Podgorelec, “Patterns for enterprise application integration,” Fifth joint conference on knowledge-based software engineering, Maribor, Slovenia, Sept. 2002, Vol. 80, pp. 88–101.

Vili Podgorelec, Peter Kokol, Ivan Rozman, “Searching for software reliability with text mining,” Fifth joint conference on knowledge-based software engineering, Maribor, Slovenia, Sept. 2002, Vol. 80, pp. 205–214.

Izidor Golob, Tatjana Welzer, Boštjan Brumen, Ivan Rozman, “Improving data development process,” Fifth joint conference on knowledge-based software engineering, Maribor, Slovenia, Sept. 2002, Vol. 80, pp. 297–303.

Maja Pušnik, Matjaž B. Jurič, “Comparison of technologies for connecting business process among enterprises,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. D, pp. 21–24.


Simon Beloglavec, Ivan Rozman, “Vloge pri razvoju strežniških komponent,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. D, pp. 53–56.

Matjaž B. Jurič, Ivan Rozman, Marjan Heričko, “Patterns for component based EAI,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. D, pp. 225–230.

Aleš Živkovič, Marjan Heričko, “Modeliranje procesa razvoja programske opreme z razširjeno notacijo UML,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. D, pp. 239–242.

Boštjan Šumak, Marjan Heričko, Matjaž B. Jurič, “Povezovalni strežnik kot integrator poslovnih procesov,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. D, pp. 243–246.

Simon Beloglavec, Marjan Heričko, Boštjan Kežmah, Matjaž B. Jurič, Ivan Rozman, “Načrtovanje strežniških komponent za J2EE arhitekturo,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 83–86.

Marjan Heričko, Simon Beloglavec, Aleš Živkovič, Matjaž B. Jurič, “Uporaba vzorcev pri razvoju v Javi,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 87–90.

Aleš Živkovič, Marjan Heričko, Ivan Rozman, “Računalniško podprto ocenjevanje obsega programskih projektov po metod FPA,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 91–94.

Gregor Polančič, Romana Vajde Horvat, Ivan Rozman, Tomislav Rozman, Katja Harej, “Izboljšanje kakovosti programa Socrates Erasmus,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 111–114.

Luka Pavlič, Romana Vajde Horvat, Tomislav Rozman, Gregor Polančič, Katja Harej, Ivan Rozman, “Zakaj in kako izgraditi spletni portal?,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 147–150.

Matjaž B. Jurič, Ivan Rozman, Marjan Heričko, Simon Beloglavec, Boštjan Kežmah, “Integracija z uporabo spletnih storitev,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 155–158.


Boštjan Kežmah, Simon Beloglavec, Matjaž B. Jurič, Ivan Rozman, Marjan Heričko, “Spletne storitve v rešitvah ERP,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 163–166.

Katja Harej, Romana Vajde Horvat, Tomislav Rozman, Gregor Polančič, Luka Pavlič, Ivan Rozman, “Zahteve informacijskega sistema standardizacijskih hiš,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 195–198.

Boštjan Šumak, Boštjan Kežmah, Ivan Rozman, Marjan Heričko, “Vloga povezovalnih strežnikov pri integraciji poslovnih procesov,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 203–206.

Vili Podgorelec, “Klasifikacija pacientov z Alzheimerjevo boleznijo z metodo AREX,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 213–216.

Matjaž B. Jurič, “Pomen spletnih storitev in ebXML za elektronsko poslovanje,” Semin. Infos, Ljubljana, Slovenia, Oct. 2002, 18 pp. (PPT).

Matjaž B. Jurič, “Komponentni model in spletne storitve,” 7. NT konferenca, Portorož, Slovenia, May 2002, pp. 332.

Matjaž B. Jurič, “Komponentni razvoj in programiranje,” 7. NT konferenca, Portorož, Slovenia, May 2002, pp. 333.

Uroš Sajko, Romana Vajde Horvat, “Upravljanje konfiguracije kot podlaga za izboljšanje programskega procesa,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, Vol. B, pp. 79–82.

Tomislav Rozman, Romana Vajde Horvat, Ivan Rozman, Gregor Polančič, Katja Harej, “"Brezplačna" programska infrastruktura za spletne aplikacije,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 100–105.

Gregor Polančič, Romana Vajde Horvat, Ivan Rozman, Tomislav Rozman, Katja Harej, “Kompleksnost gradnje spletnih aplikacij,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 203–208.

Matjaž B. Jurič, Simon Beloglavec, Marjan Heričko, “Razvoj integracijskih komponent s pomočjo Oracle 9iAS,” 7. strokovno srečanje uporabnikov programske opreme Oracle – SIOUG 2002, Portorož, Slovenia, Sept. 2002, pp. 18.


Matjaž B. Jurič, “Zakaj spletne storitve niso zgolj novi komponentni model,” Sedma konferenca Objektna tehnologija v Sloveniji OTS '02, Maribor, Slovenia, June 2002, pp. 1–11.

Boštjan Kežmah, “Sožitje različnih programskih jezikov in komponentnih modelov v skupnem strežniku,” Sedma konferenca Objektna tehnologija v Sloveniji OTS '02, Maribor, Slovenia, June 2002, pp. 40–47.

Igor Novak, “Integracija poslovnih sistemov s sporočilnimi sistemi,” Sedma konferenca Objektna tehnologija v Sloveniji OTS '02, Maribor, Slovenia, June 2002, pp. 73–84.

Boštjan Šumak, Aleš Živkovič, Boštjan Kežmah, “Integracijski mehanizmi in pobuda BizTalk,” Sedma konferenca Objektna tehnologija v Sloveniji OTS '02, Maribor, Slovenia, June 2002, pp. 103–115.

Simon Beloglavec, Gregor Kovač, Miha Uplaznik, “Komponentne zasnove z diagramskimi tehnikami UML,” Sedma konferenca Objektna tehnologija v Sloveniji OTS '02, Maribor, Slovenia, June 2002, pp. 207–214.

Boštjan Kežmah, “Spletne storitve v poslovnih omrežjih,” 2. konferenca študentov podiplomskega študija Ekonomsko-poslovne fakultete, Maribor, Slovenia, Sept. 2002, pp. 73–81.


Romana Vajde Horvat, “Vzpostavitev sistema vodenja kakovosti,” lecture at Gospodarska zbornica Slovenije, Območna zbornica Maribor, Slovenia, Jan. 22, 2002.

Ivan Rozman, “Methodology For Integrating Dimensional Schemata,” invited speech at 14th International Conference On Systems Research, Informatics And Cybernetics Intersymp 2002, Baden-Baden, Germany, July 29, 2002.

Ivan Rozman, “Improving Data Development Process,” lecture at the conference, Maribor, Slovenia, Sept. 11, 2002.

Branko-Matjaž Jurič, “Autonomous System for Increasing the Quality of Medical Data,” lectures at the conference, Malaga, Spain, Sept. 23, 2002.

Branko-Matjaž Jurič, “J2EE for Enterprise Application Integration and e-business Integration,” presentation at the conference OOPSLA 2002, Seattle, United States, Nov. 5, 2002.


Branko-Matjaž Jurič, “J2EE for EAI and B2B Integration,” invited keynote lecture, Prague, Czech Republic, Nov. 14, 2002.

Vili Podgorelec, “Software Metrics,” lecture at the Madeira University, Madeira, Portugal, Dec. 16–23, 2002.


Prof. Dr. Ivan Rozman: Programme committee member of expert meeting 9th Conference Days of Slovenian Informatics, Portorož, Slovenia, Apr. 17–19, 2002.

Asst. Prof. Dr. Vili Podgorelec: Co-ordinated organisation and implementation of The 15th IEEE Symposium on Computer-Based Medical Systems, Maribor, Slovenia, June 4–7, 2002.

Regina Stajnko, Boštjan Šumak, Aleš Živkovič, MSc, Simon Beloglavec, Asst. Prof. Dr. Branko-Matjaž Jurič, Igor Novak, Miha Strehar:

Organising committee members of Object Technology in Slovenia, Maribor, Slovenia, June 19–20, 2002.

Asst. Prof. Dr. Marjan Heričko: Programme and organising committee chairman of Object Technology in Slovenia, Maribor, Slovenia, June 19–20, 2002.

Asst. Prof. Dr. Branko-Matjaž Jurič, Prof. Dr. Ivan Rozman, Aleš Živkovič, MSc:

Programme committee members of Object Technology in Slovenia, Maribor, Slovenia, June 19–20, 2002.

Asst. Prof. Dr. Branko-Matjaž Jurič: Member of international programme board of World multiconference on systemics, cybernetics and informatics SCI 2002, Orlando, Florida, United States, July 23–26, 2002.

Prof. Dr. Ivan Rozman: Chairman of the international conference 5th Joint Conference on Knowledge-Based Software Engineering, Maribor, Slovenia, Sept. 11–13, 2002.


Prof. Dr. Ivan Rozman: Programme committee member of 13th International Conference on Information and Intelligent Systems, Varaždin, Croatia, Sept. 25–27, 2002.

Prof. Dr. Ivan Rozman: Chairman of the Development and reengineering of information system confernece, Ljubljana, Slovenia, Oct. 14, 2002.

Asst. Prof. Dr. Branko-Matjaž Jurič, Asst. Prof. Dr. Marjan Heričko, Prof. Dr. Ivan Rozman:

Members of international programme board of Information Society 2002, Ljubljana, Slovenia, Oct. 14–18, 2002.

Asst. Prof. Dr. Branko-Matjaž Jurič, Asst. Prof. Dr. Marjan Heričko:

Chairmen of the Collaboration and Information Society conference, Ljubljana, Slovenia, Oct. 17, 2002.

Prof. Dr. Ivan Rozman: Programme committee member of INFOS 2002 and section chair of "Arhitekture in metode za e-poslovanje," at INterINFOS 2002, Ljubljana, Slovenia, Oct. 21–25, 2002.

Asst. Prof. Dr. Branko-Matjaž Jurič: Reviewer for International Journal of Distance Education Technologies.

Asst. Prof. Dr. Branko-Matjaž Jurič: Reviewer of the book Server Component Patterns, John Wiley & Sons.

Asst. Prof. Dr. Vili Podgorelec: Editor of a special issue of Journal of Medical Systems.

Asst. Prof. Dr. Vili Podgorelec: Reviewer for IEEE Transactions on Evolutionary Computing.

Asst. Prof. Dr. Vili Podgorelec: Reviewer for Information Processing Letters.


Prof. Dr. Ivan Rozman: National representative of Slovenia at ENQA General Assembly, Kopenhagen, Denmark, May


27–28, 2002.

Asst. Prof. Dr. Vili Podgorelec: Visit in scope of international project SQUAB-P, Funchal, Madeira, Portugal, Dec. 16–31, 2002.

GUESTS AND VISITORS

Neil Huston (Microsoft, EMEA region, Berkshire, United Kingdom):

Invited lecture on the conference OTS 2002, June 20, 2002.

Jaak Henno (Tallinn Technical University, Tallinn, Estonia):

Working visit, Sept. 9–14, 2002.

Jef Vanbockryck (Xti – Xtreme-Integrations, 2630 Aartselaar, Belgium):

Invited lecture on InterINFOS 2002, Oct. 23, 2002.

Tihomir Hunjak (University of Zagreb, Fakultet organizacije i informatike, Varaždin, Croatia):

Visit, Nov. 21, 2002.


Prof. Dr. Ivan Rozman: Honour for successful and innovative project cooperation with several business partners in Slovenia, Maribor, Slovenia, Nov. 21, 2002.

Asst. Prof. Dr. Branko-Matjaž Jurič: Faculty Honour for the Book Professional J2EE, published by Wrox Press, Maribor, Slovenia, Nov. 21, 2002.

IN - 22 Database Technologies Laboratory

DATABASE TECHNOLOGIES LABORATORY

Head:

Assoc. Prof. Dr. Tatjana Welzer Družovec

Phone: +386 2 235 51 30


RESEARCH PROJECTS











Database Technologies Laboratory IN - 23

Industrial project

IAZZPB SIST Izvedba analize zahtev za podatkovno bazo SIST (Requirements analysis for SIST database)

Leader: Prof. Dr. Ivan Rozman Participants: Asst. Prof. Dr. Romana Vajde Horvat, Gregor Polančič, Tomislav

Rozman, Katja Harej, Assoc. Prof. Dr. Tatjana Welzer Družovec, Štefan Masič

Financed by: Slovenian Institute for Standardization

The two main goals of the project are requirements analysis for an information system which would support the standardization processes of SIST, and review of the applicability of different DBMS according to the specifics of standardization processes. The project will be conducted in the following phases: Phase 1: Analysis of standardization processes within SIST, based on a review of the current state and use of the information technology support. Phase 2: The development of a conceptual model of SIST database and description of required functionality of the information system to support standardization processes. Phase 3: Analysis of the applicability of commercial DBMS (Oracle and LotusNotes environment).

Results of the project will be: conceptual model of SIST database and report of the DBMS analysis.



Leaders: Assoc. Prof. Dr. Tatjana Welzer Družovec, Lorenzo Moreno Ruiz (Centro Superior de Informatica Universidad de La Laguna)

Participants: Prof. Dr. Peter Kokol, Asst. Prof. Dr. Marjan Družovec, Prof. Emeritus Dr. Bruno Stiglic, Boštjan Brumen, Dr. Špela Hleb-Babič, Asst. Prof. Dr. Milan Zorman, Asst. Prof. Dr. Vili Podgorelec


Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; Ministry of Foreign Affairs of the Kingdom of Spain

Within the project we will study the simulation of hospital management. The basis of the simulation will be a data base containing data of administration, sources, schedules, employees, etc. Second part of the project represents a system for diagnosing Alzheimer


disease based on the analysis of EEG signals. This analysis will be performed with the use of the symbolic description of EEG signal, soft automata, statistical analysis, and neural networks.

TEAMWork IST-2000-28162

Technology Exploitation and Adaptable Methodologies offering new Organisational Models and Practices for e-Working Teams

Leader: Prof. Dr. Ivan Rozman Participants: Asst. Prof. Dr. Romana Vajde Horvat, Assoc. Prof. Dr. Tatjana

Welzer Družovec, Gregor Polančič, Tomislav Rozman, Regina Stajnko, Boštjan Brumen, Katja Harej


The main goal of the project is to verify and disseminate the BestregIT methodology (developed within previous EU projects and aims to model the organization’s mission, structure and process workflow) and NQA environment (which enables the automatization of workflow and document management). Both, BestregIT and NQA, have been introduced to members of the project team. Within the second part of the project, University of Maribor team modelled the Socrates Erasmus student exchange process. Further, the model will be supported within NQA and verified and used within a test group of users. Other process models for cooperation of different partners within EU projects and for the cooperation of research institutions will be developed, as well as model for software development support. The results of the project will be disseminated within the broader community. There are 14 partners working within the project. The budget of the project is 1.2 million euro.


Applied project








PUBLICATIONS

Boštjan Brumen, Izidor Golob, Tatjana Welzer, Ivan Rozman, Marjan Družovec, Hannu Jaakola, “Data protection for outsourced data mining,” Informatica (Ljublj.), Vol. 26, No. 2, pp. 205–210, 2002.

Jasmin Malkić, Tatjana Welzer Družovec, Boštjan Brumen, “Development of application for remote database access using Java security functions,” Uporab. inform. (Ljubl.), Vol. 10, No. 2, pp. 73–78, 2002.

Hannu Jaakkola, Boštjan Brumen, Jyrki Kukkonen, “Reuse strategies in software engineering,” Uporab. inform. (Ljubl.), Vol. 10, No. 3, pp. 139–147, 2002.

Boštjan Brumen, Tatjana Welzer-Družovec, Hannu Jaakkola, Izidor Golob, Ivan Rozman, “Towards cost-effective construction of classification methods,” Information modelling and knowledge bases XIII (Frontiers in artificial intelligence and applications), Amsterdam, Vol. 73, pp. 301–306.

Boštjan Brumen, Tatjana Welzer, Izidor Golob, Hannu Jaakkola, “Autonomous estimation of sample size for classification,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 6 pp.

Marjan Družovec, Tatjana Welzer, Boštjan Brumen, “Handling extensive medical data,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 7 pp.


Tatjana Welzer, Boštjan Brumen, Marjan Družovec, Matjaž B. Jurič, “Autonomous system for increasing the quality of medical data,” Third International NAISO Symposium on Engineering of intelligent systems EIS '02, Malaga, Spain, Sept. 2002, 5 pp.

Boštjan Brumen, Izidor Golob, Tatjana Welzer Družovec, Hannu Jaakkola, “Capacity of a supervised learning algorithm,” IASTED International Conference Applied Informatics, Innsbruck, Austria, Feb. 2002, pp. 323–326.

Tatjana Welzer, Boštjan Brumen, Izidor Golob, Marjan Družovec, “Medical diagnostic and data quality,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 97–101.

Boštjan Brumen, Tatjana Welzer Družovec, Marjan Družovec, Izidor Golob, Hannu Jaakkola, “Protecting medical data for analyses,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 102–107.

Izidor Golob, Boštjan Brumen, Tatjana Welzer-Družovec, “Data warehouse architectures,” Savjetovanje Računala u tehničkim inteligentnim sustavima MIPRO 2002, Opatija, Croatia, May 2002, pp. 5–8.

Izidor Golob, Boštjan Brumen, Tatjana Welzer-Družovec, “How to satisfy EU directive on data protection in a data warehouse?,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, pp. 112–114.

Izidor Golob, Tatjana Welzer, Boštjan Brumen, “Procesi za izpeljavo informacij,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 143–146.

Matjaž B. Jurič, Ivan Rozman, Tatjana Welzer, Marjan Heričko, Boštjan Brumen, Vili Podgorelec, “Patterns for enterprise application integration,” Fifth joint conference on knowledge-based software engineering, Maribor, Slovenia, Sept. 2002, Vol. 80, pp. 88–101.

Izidor Golob, Tatjana Welzer, Boštjan Brumen, Ivan Rozman, “Improving data development process,” Fifth joint conference on knowledge-based software engineering, Maribor, Slovenia, Sept. 2002, Vol. 80, pp. 297–303.


Tatjana Welzer Družovec, “Reusability and its influence in data environment,” lecture in the framework of Teachers Mobility in Socrates/Erasmus at the Universitat Rovira i Virgili, Tarragona, Spain, Apr. 4–12, 2002.


Boštjan Brumen, “Introduction to decision trees,” lecture in the framework of the Socrates/Erasmus exchange at the Universitat Rovira i Virgili, Tarragona, Spain, Apr. 4–12, 2002.

Tatjana Welzer Družovec, “Computer Science seminar: Data and Intelligent Systems,” lecture in the framework of Socrates TS at the School of Mathematics and systems engineering, Univerisity of Växjö, Sweden, Apr. 23, 2002.

Boštjan Brumen, “Selected Topics in Data Management,” lecture within the Socrates/Erasmus TS mobility program, Pori, Finland, May 7–14, 2002.

Boštjan Brumen, Izidor Golob, Tatjana Welzer Družovec, “Methodology for Integrating Dimensional Schemata,” invited speech at the 14th International Conference On Systems Research, Informatics And Cybernetics Intersymp 2002, Baden-Baden, Germany, July 29, 2002.

Tatjana Welzer Družovec, Boštjan Brumen, Izidor Golob, Marjan Družovec, “Influence Of Data Quality On Different Domains,” invited speech at the 14th International Conference On Systems Research, Informatics And Cybernetics Intersymp 2002, Baden-Baden, Germany, July 29, 2002.

Tatjana Welzer Družovec, Boštjan Brumen, Marjan Družovec, Matjaž B. Jurič, “Autonomous System for Increasing the Quality of Medical Data,” invited lecture at the conference, Malaga, Spain, Sept. 23, 2002.

Boštjan Brumen, Tatjana Welzer Družovec, Izidor Golob, Hannu Jaakkola, “Autonomous Estimation of Sample Size for Classification,” invited lecture at the conference, Malaga, Spain, Sept. 23, 2002.


Boštjan Brumen: Section organiser and section chair at expert meeting 9th Conference Days of Slovenian Informatics, Portorož, Slovenia, Apr. 17–19, 2002.

Assoc. Prof. Dr. Tatjana Welzer Družovec:

Programme committee member and section organizer at expert meeting 9th Conference Days of Slovenian Informatics, Portorož, Slovenia, Apr. 17–19, 2002.

Assoc. Prof. Dr. Tatjana Welzer Programme committee member of 5th International


Družovec: Conference on Information Systems Modeling, Roznov pod Adhostem, Czech Republic, Apr. 22–24, 2002.


Programme committee member of international workshop Web Based Collaboration, Aix-en-Provence, France, Sept. 2–6, 2002.


Programme committee member of international conference Advances in Databases and Information Systems, Bratislava, Slovakia, Sept. 8–11, 2002.


Chairman of the programme committee of international conference 5th Joint Conference on Knowledge-Based Software Engineering, Maribor, Slovenia, Sept. 11–13, 2002.

Boštjan Brumen: Chairman of the organizing committee of international conference 5th Joint Conference on Knowledge-Based Software Engineering, Maribor, Slovenia, Sept. 11–13, 2002.


Co-chairman and organizer and chair of the section of invited lecturers at Third International NAISO Symposium on Engineering of intelligent systems, Malaga, Spain, Sept. 24–27, 2002.


Special Edition Guest Editor of Informatica, Vol. 26, No. 2.



Visit within the SOCRTATES–LEONARDO program, Oslo, Norway, Jan. 1, 2002.


Visit within the Valeurtech project, Marseilles, France, Mar. 15–19, 2002.


Working visit within the "Teaching staff mobility" SOCRTAES–ERASMUS program, Tarragona,


Spain, Apr. 4–12, 2002.

Boštjan Brumen: Working visit within the "Teaching staff mobility", SOCRATES–ERASMUS program, Pori, Finland, Apr. 17–25, 2002.


Working visit within the "Teaching staff mobility", SOCRATES–ERASMUS program, Växjö, Sweden, Apr. 23, 2002.

Boštjan Brumen: Working visit within the "Teaching staff mobility", SOCRATES–ERASMUS program, Pori, Finland, May 7–14, 2002.

Boštjan Brumen: Visit within the Valeurtech project, Galati, Romania, June 12–16, 2002.


Working visit within the "Teaching staff mobility" SOCRTAES–ERASMUS program, Braga, Portugal, Oct. 19–23, 2002.


Visit within the Valeurtech project, Porto, Portugal, Oct. 23–27, 2002.

Izidor Golob, MSc: Postgraduate research visit with DAAD scholarship, Münster, Germany, Nov. 1–30, 2002.

GUESTS AND VISITORS

Pedro R. Henriques (University of Minho, Braga, Portugal):

Visit within the SOCRATES–ERASMUS program with lecture on “Language Processors Generation, AG, and Programming Paradigms,” Apr. 14–16, 2002.

Leon Strous (IFIP/TC11):

Working visit, Mar. 7–8, 2002.

Sebastian von Solms (Rand Afrikaans University):

Visit with lecturing on “Security and Standards,” Mar. 7–8, 2002.


Gabriel Pestana (University of Madeira, Madeira, Portugal):

Visit within the SOCRATES–ERASMUS program with lecture “Geographical Information Systems,” May 6, 2002.

Ana Isabel Cardoso (University of Madeira, Madeira, Portugal):

Visit within the SOCRATES–ERASMUS program with lecture on “Alpha Metrics,” May 8, 2002.

Samer Ibrahem Fernandez, Eduard Vila, Jordi Ferre Palas (Rovira i Virgili University, Tarragona, Spain):

Study visit within the SOCRATES–ERASMUS program and preparing a diploma theses, Feb. 1 to July 31, 2002.

Eikazu Niwano (NTT Information Sharing Platform Laboratories, Tokyo, Japan):

Working visit , Sept. 9–15, 2002.

Shuichiro Yamamoto (NTT Data Corporation, Tokyo, Japan):

Working visit, Sept. 9–15, 2002.

Larry English (Information Impact International, Inc., Brentwood, United States):

Invited lectures on "Total Information Quality Management: Quality Data Models And Information", Oct. 8, 2002.


Assoc. Prof. Dr. Tatjana Welzer Družovec and Database Technologies Laboratory: The Faculty Award for participation in the EU Leonardo da Vinci pilote project; honoured at the celebration of the day of the Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia, Nov. 21, 2002.

Computer Mediated Communication Laboratory IN - 31

COMPUTER MEDIATED COMMUNICATION LABORATORY

Head:

Prof. Dr. Jozsef Györkös

Phone: +386 2 235 51 25


RESEARCH PROJECTS











IN - 32 Computer Mediated Communication Laboratory


Applied project







PUBLICATIONS

Robert T. Leskovar, József Györkös, Ivan Rozman, “Gradnja hierarhične strukture konceptov iz nestrukturiranih tekstovnih dokumentov,” Uporab. inform. (Ljubl.), Vol. 10, No. 2, pp. 102–112, 2002.

Andrej Bregar, “Measuring the quality of spreadsheet decision models,” Savjetovanje Računala u tehničkim inteligentnim sustavima MIPRO 2002, Opatija, Croatia, May 2002, pp. 1–4.

Computer Mediated Communication Laboratory IN - 33

Robert T. Leskovar, József Györkös, Ivan Rozman, “A decompositional approach to content structuring,” Savjetovanje Računala u tehničkim inteligentnim sustavima MIPRO 2002, Opatija, Croatia, May 2002, pp. 31–36.

Robert T. Leskovar, “Signs of transcedence,” 5. mednarodna multikonferenca Informacijska družba IS '02, Ljubljana, Slovenia, Oct. 2002, Vol. C, pp. 155–158.

Andrej Bregar, “Načrtovanje in gradnja odločitvenih modelov v elektronski preglednici,” Dnevi slovenske informatike DSI 2002, Portorož, Slovenia, Apr. 2002, pp. 106–110.


Boris Lahovnik: Organising committee member of Object Technology in Slovenia, Maribor, Slovenia, June 19–20, 2002.

IN - 34 Real-Time Systems Laboratory

REAL-TIME SYSTEMS LABORATORY

Head:

Prof. Dr. Matjaž Colnarič

Phone: +386 2 220 74 30


RESEARCH PROJECTS



Z2-3493-0796 Celostno snovanje vgrajenih krmilnih sistemov (Holistic Embedded Control Systems Design)

Leader: Dr. Roman Gumzej


In the project, methods for holistic embedded control systems hardware and software design will be devised and joined in a methodology, with the goal of enhancing their reliability, safety and maintainability. Areas of hardware and software architecture (co-)specification, verification and validation of the design with regard to its feasibility will be covered. An existing real-time programming language will be enhanced for use with the mentioned methodology. Tool prototypes will be implemented to check the suitability of the novel concepts.

This project outlines an approach to co-design of hardware and software which has the goal of achieving a better quality of real-time systems. The syntax was defined for a specific meta-language to describe the hardware and software configuration of the system. The standard PEARL for distributed systems (DIN 66253, Part 3 [PEARL89]) is considered the basis for our research. It defines the syntax of the hardware and software configuration description language, which is meant to be used for systems that are programmed in PEARL [PEARL81, PEARL82]. The above mentioned specification language was enhanced to enable the specification of asymmetrical architecture and diverse multiprocessor systems architecture as well as a precise description of peripheral devices, attached to them.

Graphical constructs with the same semantics as the formerly described syntax are defined

Real-Time Systems Laboratory IN - 35

and a tool, enabling specification and code production in the formerly mentioned syntax, is being developed. The possibility of using this tool as a development framework for producing the specification of hardware and software architectures (taking the visual CASE tools as an example) is being considered. It was extended with timed state transition diagrams to be able to build prototypes of applications. These diagrams have the semantics of timed state transition automatons. They contain the framework of the application as well as all its real-time constraints. The feasibility of the applications architecture (program model) on the designed systems architecture (the virtual machine) is to be checked by co-simulation.

Applied project

L2-3446-0796 Zanesljivost vgrajenih krmilnih sistemov (Dependability of Embedded Control Systems)

Leader: Asst. Prof. Dr. Domen Verber Participants: Aleksander Polutnik, MSc; Bor Prihavec

Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia; ULTRA Company

A typical control system today consists of physical process components, sensors, actuators, distributed computers with communication networks, and several thousands of lines of code. Examples of those are control systems in industrial plants, nuclear reactors, avionics, etc. The size and the complexity of such systems increase every year and so does the probability of fault in one of many components. Each fault in such system can cause severe material loss or even endanger human lives.

The most of the researchers that are dealing with the problem of fault-tolerant computing is only providing partial solutions. However, for appropriate consideration of all problems, holistic approach is necessary.

The main issue of the project is the study and the development of methods and tools for hierarchically organised fault-tolerant control systems. Such systems consist of hierarchically organised function unit. On the lowest level, they are connected with the network of sensors and actuators, through which the control system communicates with its environment. The proposed model can deal with faults in the environment, in the hardware and in the software of embedded system, etc. Basic research topics covered with the project are fault detection, fault localisation and isolation, graceful degradation of the functionality of the system in a case of a minor fault, and controlled and safe shut-down of the system in the case of severe defects.



IST-2001-32122 IFATIS – Intelligent Fault Tolerant Control in Integrated Systems, WP4: Fault Tolerance in Computer Systems

Leaders: Steven X Ding (University Duisburg-Essen, The Gerhard Mercator University), Prof. Dr. Matjaž Colnarič

Participants: Asst. Prof. Dr. Domen Verber, Dr. Matej Šprogar, Dr. Roman Gumzej, Stanislav Moraus, Bojan Hadjar, Rok Ostrovršnik

Project partners: University Duisburg-Essen; The Gerhard Mercator University; Centre de Recherche en Automatique de Nancy, Universite Henri Poincare Nancy 1; Université Libre de Bruxelles; Department of Electronics, Computer Science and Systems, University of Bologna; Universita degli Studi di Roma "La Sapienza"; Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E.V.; Yorkshire Water Services Limited; TNI; Robert Bosch Gmbh


One of the major goals of this project is to establish a framework of intelligent fault tolerant control (FTC) technology, which will provide control engineers and scientists with advanced methods to approach FTC problems in complex control systems in a systematic way. It will build a basis for the future development of user-specified FTC tools and systems in all kinds of industrial sectors. The second goal of the project is the development of a novel methodology and a software tool (IFATIS tool) for the integrated design of the real time, multilevel FTC systems. The IFATIS tool will be platform independent and constructed in two levels. The final goal for practical prototype implementation is the customisation of the achieved results to automotive systems, to a water treatment process and to the construction of an FTC platform for robotic systems.

PUBLICATIONS

Roman Gumzej, Matjaž Colnarič, “Specification PEARL constructs for embedded real-time systems co-design,” PEARL-News, Ausg. 2, pp. 5–10, Nov. 2002.

Matej Šprogar, Mitja Lenič, Silvia Alayon, “Evolution in medical decision making,” J. med. syst., Vol. 26, No. 5, pp. 479–489, Oct. 2002.

Matjaž Colnarič, Osnove digitalne tehnike v računalništvu. Maribor, Slovenia: Faculty of Electrical Engineering and Computer Science, Institute of Informatics 2002.

Real-Time Systems Laboratory IN - 37

Wolfgang A. Halang, Matjaž Colnarič, “Dealing with exceptions in safety-related embedded systems,” 15th Triennial World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 2002, 6 pp.

Uwe Maier, Matjaž Colnarič, “Some basic ideas for intelligent fault tolerant control systems design,” 15th Triennial World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 2002, 6 pp.

Matjaž Colnarič, “WP4 – FDI-FT in computer systems,” 1st IFATIS Workshop, Bologna, Italy, Oct. 2002, 10 pp.

Domen Verber, Matjaž Colnarič, “Some solutions in the implementation of the fault-tolerant hardware platform,” 1st IFATIS Workshop, Bologna, Italy, Oct. 2002, 10 pp.

Roman Gumzej, Wolfgang A. Halang, “PEARL for distributed embedded systems: object oriented perspective,” Design and analysis of distributed embedded systems, pp. 11–20.

Domen Verber, Matjaž Colnarič, Wolfgang A. Halang, “Fault detection in safety-critical embedded systems,” Design and analysis of distributed embedded systems, pp. 113–119.

Matjaž Colnarič, “An application for distance learning of data structures and sorting algorithms,” 24th International Conference on Information Technology Interfaces ITI 2002, Cavtat, Croatia, June 2002, pp. 135–140.

Matej Šprogar, Peter Kokol, Silvia Alayón, “Autonomous evolutionary algorithm in medical data analysis,” 15th IEEE symposium on computer-based medical systems CBMS 2002, Maribor, Slovenia, June 2002, pp. 71–76.

Martin Terbuc, Rok Ostrovršnik, “Uporaba Linux operacijskega sistema za delo v realnem času,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 281–284.

Domen Verber, Stanislav Moraus, “Uporaba FPGA vezij za zaznavo napak v vgrajenih krmilnih sistemih,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. A, pp. 315–317.

Matej Šprogar, Peter Kokol, “Avtonomne evolucijske metode v klasifikaciji,” 11th International Electrotechnical and Computer Science Conference ERK 2002, Portorož, Slovenia, Sept. 2002, Vol. B, pp. 95–98.



Prof. Dr. Matjaž Colnarič: Program committee member and session chairman at The 15th IEEE Symposium on Computer-Based Medical Systems, Maribor, Slovenia, June 4–7, 2002.

Prof. Dr. Matjaž Colnarič: Program committee member of Object Technology in Slovenia, Maribor, Slovenia, June 19–20, 2002.

Prof. Dr. Matjaž Colnarič: Session chairman and reviewer for 15th Trienal World Congress of the International Federation of Automatic Control, Barcelona, Spain, July 21–26, 2002.

Prof. Dr. Matjaž Colnarič: Editorial board member Journal of Computing and Information Technology.


Dr. Roman Gumzej: Co-operation in the research work of IFAK in the development of automation applications as well as design of communication networks in industrial environments, Barleben, Germany, Apr. 15 to Aug. 15, 2002.

GUESTS AND VISITORS

Jose Ignacio Estevez Damas (University of La Laguna, Tenerife, La Laguna, Spain):

Scientific collaboration in the framework of Socrates/Erasmus programme, Mar. 9 to June 13, 2002.

annual report on research activities for year 2002

Documents