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The Internet Web Basics

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The Internet Web Basics. Dr. Dania Bilal IS 587 Fall 2007. The Internet. Beginning Internet without content Used for email and FTP Internet with content Usenet newsgroups Directory: Gopher. Gopher. Menu-driven content Used by universities Gopher was indexed by Jughead Veronica.

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The Internet Web Basics

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  1. The InternetWeb Basics Dr. Dania Bilal IS 587 Fall 2007

  2. The Internet • Beginning • Internet without content • Used for email and FTP • Internet with content • Usenet newsgroups • Directory: Gopher

  3. Gopher • Menu-driven content • Used by universities • Gopher was indexed by • Jughead • Veronica

  4. WWW • 1991, Tim-Berners Lee created WWW • GUI interface • Hypertext navigation of content • Multimedia (text, sound, graphics) • 1995, Web has become popular and search engines were developed

  5. Web • Web interfaces took over text-based interfaces such as ftp • Search engines spread • Web directories • Search engines have become portals • Multi-functions

  6. Internet History • See Timeline in Text, chap. 1 • See URLs for Internet history and growth, chap. 1 • http://www.extremesearcher.com/handbooklinks.html#chap1

  7. Searching the Web • General search engines • Specialized search engines • Engines vs. portals • Meta-search engines • Directories • Meta-directories All is found at http://searchenginewatch.com/showPage.html?page=2156221

  8. Use of Engines & Directories • Engines • To search by keyword, phrase, etc. • Topic is specific • Complex searches • Lots of information is retrieved • Searching is done in billions of pages • Directories • To browse by categories • From broad to specific • Simple searches • Less information is retrieved • Searching is done in millions of pages

  9. Basic Search Strategy • Identify information need • Extract basic concepts • Formulate strategy using concepts and appropriate search parameters • Boolean, proximity, search limiting, as appropriate • Select appropriate engine, directory, meta- engine, or meta-directory

  10. Basic Search Strategy • Conduct the search (pay attention to spelling) • Examine first page of results for relevance • Revise search based on results retrieved • If not satisfied, use another search engines or directory Note: Meta-engines and meta-directories are used when lots of information is needed for research purposes.

  11. The Question of Quality • Criteria for evaluating information quality • Source domain (.com, .edu, .gov, etc.) • Authority • Purpose or motivation • Quality of writing • Balanced views • Currency of information • Sources cited

  12. The Question of Quality • Accuracy • Factual information (check against two or more authoritative sources) • Currency http://www.virtualchase.com/quality http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/Evaluate.html http://epress.lib.uh.edu/pr/v8/n3/smit8n3.html (content quality and design/navigation)

  13. The Invisible Web • Search engines don’t index all web pages • Reasons: • Page are password-protected • Pages are too deep (too much to index) • Pages not picked up by spiders or crawlers • See sites for finding information on the IW in Text.

  14. Overview of Web 2.0 • Web 2.0: The machine is us/ing usvideo found at http://www.youtube.com • Search under • Web 2.0 (video) • What is web 2.0 (video) • http://en.wikipedia.org/wiki/Web_2 • Definition, characteristics of Web 2.0, and other information

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