european green it webinar 2014 - green web engineering (germany)
TRANSCRIPT
Greenness of Web Engineering
Life Cycle, Criteria, Procedure Model,
and Recommendations
Eva Kern
20th of May 2014
Outline
Introduction of Organization
Role of Digital Media in the Context of Green ICT
Green Web Engineering
Definition
Life Cycle
Recommendations
User Acceptance
Energy & Loading Time
Summary & Outlook
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Institute of Software Systems
founded in 2003
Research institute of the University of Applied Science
Trier, Environmental Campus Birkenfeld
Focus on applied computer sciences
Numerous research and development projects
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Institute of Software Systems
Bioinformatics
Environmental Informatics
Business Informatics
Nachhaltigkeitskriterien
für Softwareprodukte
Referenzmodell „Green Software“
Vorgehensmodell
„Green Software Engineering“
Administrieren Anwenden
Allgemeine
Qualitätskriterien
Unmittelbare
Kriterien
Mittelbare
Kriterien
Handlungsempfehlungen
und Werkzeuge
Beschaffen
Entwickeln
Lebenszyklus
von Softwareprodukten
Für
Anwender
Entwicklung
Für Beschaffer
Für Entwickler
Nutzung End of Life
Für
Administratoren3
Sustainability
Informatics
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Sustainability
Informatics
Digital
Media
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Role of Digital Media in Green ICT
Environmentally friendly role of media
Communication & Transparency
Information & Demonstration
„Green by Media“
Pollutive role of media
Production & Supply
Usage & Consumption
„Green in Media“
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Role of Digital Media in Green ICT
Environmentally friendly role of media
Communication & Transparency
Information & Demonstration
„Green by Media“
Pollutive role of media
Production & Supply
Usage & Consumption
„Green in Media“
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Green Web Engineering Definition
Green Web Engineering describes the art of
• developing,
• designing,
• maintaining,
• administrating,
• and using
a website in such a manner, that direct and indirect
energy consumption within the complete life cycle of a
website is reduced.
(Dick et al. 2010)
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Green Web Engineering Life Cycle
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Green Web Engineering Life Cycle
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Green Web Engineering Life Cycle
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Green Web Engineering Recommendations
→ optimization of media content
compression of photos, graphics and videos
compression of CSS-, JS- and HTML-sources
…
original optimised
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Green Web Engineering Recommendations
→ optimization of media content
compression of photos, graphics and videos
compression of CSS-, JS- and HTML-sources
…
Original Optimized
File type JPEG (Quality: 100) JPEG (Quality: 65)
File size335 KB
(343.464 Bytes)
36,0 KB
(36.864 Bytes)
Width x height 600 x 400 px 600 x 400 Pixel
Resolution 240 dpi 72 dpi
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Green Web Engineering Recommendations
→ attentive Internet usage
configuration of browser caches
usage of blocker (ads, flash, …)
information
general energy savings options
…
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Green Web Engineering User Acceptance
Which effects has the application of the
recommendations of Green Web Engineering on the
user's acceptance?
Are users to be become active for Green Web?
→ How does a user-centred Green Web Engineering
look like?
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Survey: User Acceptance
Method online study
Basic PopulationGerman internet users (and
adjacent countries)
Sample n = 486
Complete Questionnaires 308
Survey Period April 3rd to May 1st 2013
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Survey: User Acceptance
„Typical survey participant“:
Student
20 - 29 years old
Rhineland-Palantine (Germany)
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Survey: User Acceptance
Acceptance for a „Green Web“
Activities for a „Green Web“
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Survey: User Acceptance
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User-centred Green Web Engineering
Idea: label green websites based on quality classes
optimize & compress source code
optimize & compress graphics
without losses of information!
Renunciation of colour courses
sizes of pictures
photos: 600 to 700px
videos: 640 x 480px
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Green Web Engineering Energy Comsumption
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Green Web Engineering Energy Comsumption
active energy Firefox
„Best“ 0,1314 Wh
„Basis“ 0,1434 Wh
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Conclusion & Outlook
Media do play a role in the context of Green ICT
User's acceptance & activites for Green Web exist
Optimisation wears positive effects on the energy
consumption
Optimisation & spreading of the action recommendations
Development of suitable tools
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Thank you for your attention!
Feel free to contact us:
Trier University of Applied Sciences
Environmental Campus Birkenfeld
Institute for Software Systems
Germany
http://www.green-software-engineering.de/
http://sustainablesoftware.blogspot.de
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