Presentation on theme: "Searching The Internet Practical Strategies. URLs Look at the URL to determine what type of organization produced the site..com is a commercial site..edu."— Presentation transcript:
URLs Look at the URL to determine what type of organization produced the site..com is a commercial site..edu is an academic site..gov is a government site..org is usually a non-profit organization..net is a network service provider..mil is a military site. What domain name is used to indicate a Korean Company?
And More URLs If you found a page on phrasal verbs, called phrasals.htm within the grammar section of a site called www.studenthelp.com can you suggest what the full URL might be? www.studenthelp.com/grammar/phrasals.htm How can awareness of the URL structure be useful... When evaluating websites? When dealing with broken links?
Examples of Search Engines Google http://www.google.comttp://www.google.com Northern Light http://www.northernlight.comttp://www.northernlight.com Lycos http://www.lycos.comhttp://www.lycos.com Microsoft http://www.msn.comhttp://www.msn.com Altavista http://www.altavista.comhttp://www.altavista.com
Three Principles of Searching the Web Search Engines (key words) Subject Directories Natural Language Search pages
Using Search Engines (by key word) Refine your search by using specific key words e.g. Sydney Opera House Boolean Operators AND (+), OR, NOT (-) Punctuation e.g. biography of Marilyn Monroe
Subject Directories Search directories are categorised with information classified by topic and subject. Good for searching broad subject areas. Category headings sometimes as useful as actual hits. Examples: www.yahoo.com www.excite.com
Meta-search Engines These simultaneously search multiple search engines. They are also referred to as parallel search engines, multi-threaded search engines, or mega search engines. These are useful when: you have an obscure topic you are not having luck finding anything when you search your search is not complex you want to retrieve a relatively small number of relevant results Examples: Dogpile http://www.dogpile.com/index.gsphttp://www.dogpile.com/index.gsp Metacrawler http://www.metacrawler.com/index.htmlhttp://www.metacrawler.com/index.html
Natural Language Engines This type of search engine encourages you to ask properly phrased questions. e.g. How much does a Toshiba laptop cost? Useful for people without much search experience Tries to clarify your query with question and answer interaction Performs a meta search and returns results in friendly format Example: Ask Jeeves http://www.askjeeves.comhttp://www.askjeeves.com