course overview & exploring the internet
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Course Overview & Exploring the Internet. Week 1 LBSC 690 Information Technology. Agenda. Why study information technology? Course description and syllabus Seven uses of the Internet Computing at UMCP. Why Study Information Technology. Doing a better job in your profession Help clients - PowerPoint PPT PresentationTRANSCRIPT
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Course Overview &Exploring the Internet
Week 1
LBSC 690
Information Technology
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Agenda
• Why study information technology?
• Course description and syllabus
• Seven uses of the Internet
• Computing at UMCP
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Why Study Information Technology• Doing a better job in your profession
Help clients
Develop new services
• Affecting the social impact of these technologieseducation and the web
digital libraries
ecommerce and the web
• Fun
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Course Goals
• Learn to use common software tools
• Solve practical problems
• Evaluate the role of information technology
• Develop a personal plan for further study
• Understand computers and networks (building a better “mental model” of how information technology works).
(go browse course web pages)
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Instructional Approach
• Readings– Provide background and detail
• Class sessions– Provide conceptual structure
• Electronic online provided in class
• Slides and videotapes available
• Homework, lab sessions, project– Provide hands-on experience
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Course Organization
• Master the tools relatively early– Internet, word processors, spreadsheets, databases,
programming, multimedia– 2 readings and one homework each class session
• Apply the tools towards the end– Group work, library automation, educational
computing, social issues, digital libraries– 2 readings each week and the term project
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Some Other Good Things to Do
• Consider aITs courses for background
• Work ahead
• Ask questions about readings
• Give us feedback
• Think about a project soon
• Ask for accelerated work if you can handle it (we’re looking to GRAs, web designers, researchers, etc.)
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Course Materials
• Textbook– Oakman, The Computer Triangle 2nd edition
• Supplemental readings – Course packet available from IDSC
• Daily access to a networked computer!
• A few 3.5 inch floppy disks
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Fall 96 LBSC 690 GradesFinal Score (Excess 75)
0
5
10
15
20
25
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
Rank (higher better)
Sco
re-7
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
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Observations on Grading
• Exam scores are very important– The final is worth up to 10 homeworks– Moral: Use the homework to learn the material
• Little things can make a B into an A– less than 1 point typically separates B+ and A-
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The Fine Print• Group work is encouraged on homework
– But you must personally write what you turn in
• Deadlines are firm and sharp– Allowances for individual circumstances are
included in the grading computation
• Academic integrity is a serious matter– No group work during the exams!– Don’t discuss exam until the completion deadline is
past
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Breaks
• 10 minute break after the first hour
• 5 minute break after the second hour
• No sodas or food in class the teaching theater
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Seven Uses of the Internet
• Telnet
• Finger
• Web (HTML/HTTP)
• File Transfer Program (FTP), downloading
• Newsgroups
• Talk, IRC
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Describing Internet Applications
• Who participates?– Person-person, person-machine, machine-machine
• How many participants? (one other, many)
• Directionality? (one-way, two-way)
• Authentication? (authenticated, unauthenticated)
• When? (synchronous, asynchronous)
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Networking Concepts• Understand the basic service as much as
possible
• Networked vs. Stand-alone
• Clients and servers
• UNIX versus PC/MAC
• (more in 2nd class session)
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Telnet• Two way, computer-person, authenticated
• Gives you a login on another computer– Use telnet to read your email from wam.umd.edu
• Terminal emulation (VT-100) protocol allows only text– The pine email program is designed for VT-100– X Windows extension adds graphics
• WAM X-terminals available in CSS 4352
• Usage: from “run window”
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Electronic Mail (email)
• Person-person, one-one, asynchronous
• Pine on WAM is easy to use– Eurdora is ok if you always use the same
computer
• Mailing lists provide one-many capability– 690 mailing list is [email protected]
• Anyone can send to that list
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Email Addresses
• userid@machine+domain– (e.g., [email protected])
• Machine names are like postal addresses– Most general part is at the end (.edu, .com, …)– Most specific part is at the beginning (glue, …)
• Your userid (login name) is widely known. Protect your password
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Finger (find user name and activity from user id)
• Find a name given an email address– finger [email protected]
• other “white pages” services
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Web Pages• One way, computer-person, unauthenticated
• Uniform Resource Locator (URL)– Protocol http: (HyperText Transfer Protocol)– Machine/Domain //www.clis.umd.edu– Port (implicit) port 80– Path /academics/courses/fall99/690/– File (implicit) index.html
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Finding Web Pages
• Bookmarks– Useful if you have been there before
• Access by category – (e.g., http://www.yahoo.com)
• Limited to things processed by hand
• Access by content - search engines– (e.g., http://www.altavista.com)
– Broad coverage, but lots more trash
– No really good search engines yet
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File Transfer Program (FTP)• Two way, computer-computer, authenticated
• Used to move files between machines– Better than carrying a floppy disk around– Use FTP to send class notes from here to home
• ftp raven.umd.edu
• Unauthenticated version – Userid “anonymous” provides public access– Web browsers provide one-way anonymous FTP
• Usage: Command line
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Net (USENET) News• Person-person, many-many, asynchronous
• Similar to a large set of mailing lists– Hierarchical organization
• Most general appears first (comp., soc., …)
• Most specific appears last (rec.aviation.military)
– Organized by site rather than by individual• No need to “sign up” for a newsgroup
• Reading news - – www.deja.com– pine (wam mail reader)
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Talk/IRC
• Synchronous, authenticated
• Talk - connect to one other person
• IRC - connect to many other people
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Computing at UCMP• Open Labs (IBM, Mac, Unix)
– HBK 2101 (open lab), HBK 2108 (CLIS only)– PG2 and HBK Basement: 24 hr WAM labs
• Need an aITs “pay for print” account
• Dial-in access (Unix only)– College Park (301)209-0700 (3hr)/864-2087(15min)– Baltimore (410)962-88865(3hr)/962-8867(15min)
• WAM userid and password required
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Homework• Preliminaries (ungraded)
– WAM account, print account, email forwarding
• Email (use “pine” which is the wam mail interface)
• Listserve/Majordomo
• World-Wide Web
• USENET News
• FTP