Search engines & effective searching on the web
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Transcript of Search engines & effective searching on the web
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Search Engines & Effective Searching On The Web
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Search Engine vs Database
• Database…The information comes from books, magazines, journals etc. which have gone through a review process.
• Search engines…They find information on the internet. There is not a review process. You make the judgment whether the information is valid and accurate.
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Search Engines How do they work?
• Search engines use a “spider” or “robot” to crawl through the WWW to find websites that contain keywords or phrases
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How do I begin and effective search?
Identify keywords of your topic
For example :
Katy Tigers
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Boolean searching
Use AND to narrow search
Katy AND Tigers
It only return pages that have both words
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Boolean Or
Katy OR TigersThis will return pages that have at least one of
these words on the page. This will expand your search.
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Boolean NOT -
This tells the search engine to retrieve one keyword but not the other word.
For Example:
Dolphins NOT Miami Dolphins –Miami
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Phrase Searching
Surround groups of words with quotation marks to tell the search engine to retrieve documents in which those words appear side by side.
For example : “global warming”
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Title searching
This tells the search engine to only return web pages that have the phrase in the title.
Title: “Global warming”
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Plural Forms, Capital letters
• Most search engines interpret lowercase as either uppercase or lowercase.
• Limit your results by using uppercase letters.
• Most search engine interpret singular keywords as singular or plural.
• Limit results by using plural forms of words.
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Domain Searching
• This will allow you to limit results to certain domains such as websites from the United Kingdom (.uk), educational institutions (.edu) or government sites (gov.)
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Current domains in the US
.com = a commercial business
.edu = and educational institution
.gov = a governmental institution
.org = a non-profit organization
.mil = a military site
.net = a network site
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Other advanced operators
Site: search only one websiteexample: site:www.katyisd.org
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Link
Use this to find linked pages to your website.
link:www.katyisd.org
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Information about a page
• Info:www.cancer.org
• If you want to find out more information about the web site.
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Synonyms
• If you want information on both your keyword and its synonyms
• ~auto synonyms would be truck, car etc.
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Use web sources with caution
Internet sites are created for a variety of reasons• Sell products• Provide services• Advertise • Provide information• To persuade• To share interests and ideas
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Remember
Anyone can publish anything on the web and much of that information is inaccurate and biased.
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Check out these sites• Museum of Hoaxes http://www.museumofhoaxes.com/
• California Velcro farms http://home.inreach.com/kumbach/velcro.html
• Tree octopus http://zapatopi.net/treeoctopus/
• Brain protectors http://zapatopi.net/afdb/
• Digital photography http://publish.uwo.ca/~floyd/false/false.htm
• Dog Island http://thedogisland.com