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WWW

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WWW

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  1. WWW WeeSan Lee weesan@cs.ucr.edu

  2. Roadmap • What is WWW? • Web Browser • What is HTML? • Search Engines • Google Search • Citing & Referencing • Conclusion • References

  3. What is WWW? • World Wide Web • Invented by Tim Berners-Lee in 1991 • More than billions of web pages on the Internet today

  4. What is WWW? • Client-server architecture • Server • A program that serves the webpages • Eg. Apache, MS IIS • Client • A program that views the webpages • Eg. Browsers

  5. Web Browser • An application to view web pages from the Internet • Eg. • Firefox • Opera • Mozilla • Netscape • Safari • IE (Internet Explorer) • …

  6. Web Browser - Example

  7. Web Browser - URL • Uniform/Universal Resource Locator • Eg. • http://www.cs.ucr.edu/~weesan/ • HyperText Transfer Protocol • https://moodle.cs.ucr.edu/ • HyperText Transfer Protocol Secure • ftp://ftp.isi.edu/ • File Transfer Protocol • mailto:weesan@cs.ucr.edu • file:///c:/users/weesan/desktop/cs006/

  8. Web Browser - https example

  9. Web Browser - Cache • Some temporary files such as web pages or images stored on the HD to speed up browser • Shift-Reload (Shift-F5) if the page is stale • To clear the cache • Select Tools/Options/Advanced/Network

  10. Web Browser - Bookmarks/Favorites • Shortcuts to your favorite pages • Select Bookmarks/Bookmark this page • Or press Ctrl-D • Use Bookmark Manager to manage your bookmarks

  11. Web Browser - History • A list of visited pages

  12. Web Browser - Plug-ins • Small programs that provide an environment in your browser for a specialized software program to run • Eg. Firefox Plug-ins: • Adobe Acrobat Reader • Adblock • Mouse Gesture • Tab Effect • http://addons.mozilla.org/

  13. What is HTML? • HyperText Markup Language • The official format for the hypertext documents, aka web pages • Hypertext documents usually contains • Text • Hypertext links/hyperlinks • Images, eg. gif, jpeg, png, … • Multimedia files, eg. mpeg, mov, wmv, mp3, ra, … • Usually with extension .html or .htm

  14. HTML Example <html> <head><title>Hi</title></head> <body> <h1>Hello World!</h1> This is just a HTML example. </body> </html>

  15. Search Engines • A web-based application that allows users to search web pages online via keywords • Eg. • www.google.com • www.yahoo.com • www.msn.com • www.alltheweb.com • www.altavista.com • www.excite.com

  16. Directory Outlines • A list of topics that can be browsed and searched from general to more specific

  17. Bibliographic Databases • References collections to research materials such as journals and books • Usually a paid service, Google scholar is free

  18. Site-Specific Search Engines and Site Maps • Search only the data on a web site

  19. Metasearch Engines • An interface to several search engines and consolidating the results

  20. FAQ Pages • Compilations of the most Frequently Asked Questions and their answers

  21. General References • Dictionaries • www.dictionary.com • www.tfd.com • Encyclopedias • www.britannica.com • www.encyclopedia.com • www.wikipedia.com • Maps • maps.google.com • maps.yahoo.com • www.mapquest.com

  22. Searching for Jobs • www.jobs.com • hotjobs.yahoo.com • www.monster.com

  23. Search for People • www.411.com • www.bigfoot.com • www.email-lookup.com • people.yahoo.com

  24. Google Search AND (default) cs6 effective use of world wide web

  25. Google Search (cont) Double Quote/Exact Phase cs “effective use of world wide web” Domain Search cs6 site:ucr.edu

  26. Google Search (cont) NOT cs6 site:ucr.edu -doc OR cs6 OR cs5 site:ucr.edu

  27. Google Search (cont) • Google Advance Search • http://www.google.com/intl/en/help/refinesearch.html

  28. Citing & Referencing • Need to give credit to the original source • Otherwise is known as plagiarism • Tell readers where to find the information • Based on Publication Manual of the American Psychological Association (APA), 5th ed.

  29. Citing & Referencing - Example • Reference • Rohrer, F. (2007). Is stealing wireless wrong? Retrieved Oct 11, 2007, from BBC NEWS Web site: http://news.bbc.co.uk/2/hi/uk_news/magazine/6960304.stm • In-text Reference • Regulations prohibit the use of wireless connectivity without owner’s consent. Some arrests had been made (Rohrer, 2007). According to Rohrer, …

  30. Conclusion • WWW overview • Web browsers - Firefox • Various online search resources • Google Search • Citing and Referencing

  31. References • Internet Effectively • Ch1 & 3

  32. Homework 3 • Research the following 2 stories, see if you can verify or disprove the claims made. Backup your conclusion with references to specific web sites. • For each story, submit 2 screenshots, one from each web site you found, showing that you believe them to be true or false.

  33. Homework 3 - story 1 THIS IS NOT A JOKE. This little boy at the Mayo Clinic is very sick and he knows that he will die. Well you know how they have those "Make a Wish Foundations" that give terminally ill kids a dying wish, well this is kind of like that. He likes computers and his wish is to live forever by having his chain letter be eternally passed on the Internet. This is not some joke. And for those of you who care please send this to as many people as possible so his wish can be granted. (THIS IS NOT A CHAIN LETTER JUST DO SOMETHING NICE FOR ONCE!)

  34. Homework 3 - story 2 Dear Sir, I know this letter will come to you as a surprise but suffice it to say that I got your contact from the Nigerian Export Promostion Council who assured me that you are capable and reliable to assist me in this transaction. Before I go into details, I will first introduce myself to you. I am Mr. Joseph Abudulkarim Adisa a son to Minister of Works and Housing of the Federal of Nigeria. Recently, my father was probed, guilty and sentenced to five (5) years imprisonment by the Federal Government, President Olusegun Obasanjo for some misappropriation while he was in office during the last Military regime of Gen. Abudusalam Abubakar. Before his ordeal I successfully get hold of a sum money in one of his duplexes. And since then I have being making arrangement of how to transfer this money which is ($25,500,000.00) Twenty Five, Million five hundred thousand United States dollars to a foreign account. Now, all my fathers account is now under government claim except this one that I contacted my friends uncle who was a Bank Manager to help me lodge the said amount in a bank account in his bank and fortunately for me he agreed to help me if only I can give him 10% of the whole amount. I agree with him on this basis and he has since being making all necessary arrangement to remit the amount to a foreign account which I will provide for him. This is the reason I contacted you to please help me by providing an account where I will deposit this money. I am soliciting you to please help me for this is the only hope I have since my father have been jailed. I also have intention of coming to your country to reside with you immediately after the remittance of the money for my life is uncomfortable here anymore due to what has happened, because the government go to an extent of throwing us out of our house and locked up the house. Please help me I promise to give you 30% of the total amount. If you are interested in helping me please reach me through the above Telephone/Fax number with the Bank Information where I will lodge the money for this is what I urgently need now. …