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EDT 251
October 22, 2009
 Where    do you go?


 Are   you happy with the results?


 Whatdo you think makes the searching
 experience work well?
 Google  – 65%
 Yahoo! – 19%
 Bing – 9%
 Ask.com – 2% and Ask Kids
 Ixquick
 Clusty
 Librarians’ Internet Index
 Google Directory


 http://infopeople.org/search/chart.html
 Searchengines use software (“robots” or
 “spiders”) to index some amount of Web pages
  •   Proprietary algorithms
  •   Google claims over a trillion URLs searched
  •   Paid placement of ads provides revenue
  •   Currency – how frequently do they add sites?

 Other
      tools add human-collected or human-
 submitted sites (Google and Yahoo directories)
  • These are then searched by subject or keyword
  • Tend to be smaller in size

 Relevance    ranking of results
 AKA   the “Deep Web”

 Resourcesthat are not indexed by search
 engines (such as library databases)

 InfoMINE– indexes free-standing
 databases

 Add
    term “database” to your topic in
 Google or Yahoo
   Scholarly information subset of Google:
    http://scholar.google.com

   Many journal articles included on publisher’s web sites

   Set up “Scholar Preferences”  Library Links  enter
    “OhioLINK” and click to check the box

   Look for “Find it with OLinks” or “OhioLINK OLinks”
    links in results
 Online encyclopedia of over 3 million
 articles

 Built
      using a wiki – allows for multiple
 contributors

 How     does it work?

 What    are the cautions?
1.    Identify the important concepts
2.    Choose keywords
3.    Pick synonyms and related terms
4.    Think about using quotes, truncation, Boolean
5.    Choose a search engine
6.    Read the instructions (most rules are the same, but not all)
7.    Enter your search expression
8.    Evaluate the results
9.    Modify/narrow your search (if needed)
10.   Move to a new search engine (if needed)
    Crucial because of fluidity/lack of standards

     Some possible criteria for any source:
    •   Who wrote or created the source?
    •   What audience was the source written for?
    •   Where did you (or can you) find the source?
    •   When was the source written or created?
    •   Why was the source written?
    •   How can you verify the information contained in
        the source?

    Look carefully at URL (.com, .edu, etc.)

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Searching the web effectively f09

  • 2.  Where do you go?  Are you happy with the results?  Whatdo you think makes the searching experience work well?
  • 3.  Google – 65%  Yahoo! – 19%  Bing – 9%  Ask.com – 2% and Ask Kids  Ixquick  Clusty  Librarians’ Internet Index  Google Directory  http://infopeople.org/search/chart.html
  • 4.  Searchengines use software (“robots” or “spiders”) to index some amount of Web pages • Proprietary algorithms • Google claims over a trillion URLs searched • Paid placement of ads provides revenue • Currency – how frequently do they add sites?  Other tools add human-collected or human- submitted sites (Google and Yahoo directories) • These are then searched by subject or keyword • Tend to be smaller in size  Relevance ranking of results
  • 5.  AKA the “Deep Web”  Resourcesthat are not indexed by search engines (such as library databases)  InfoMINE– indexes free-standing databases  Add term “database” to your topic in Google or Yahoo
  • 6. Scholarly information subset of Google: http://scholar.google.com  Many journal articles included on publisher’s web sites  Set up “Scholar Preferences”  Library Links  enter “OhioLINK” and click to check the box  Look for “Find it with OLinks” or “OhioLINK OLinks” links in results
  • 7.  Online encyclopedia of over 3 million articles  Built using a wiki – allows for multiple contributors  How does it work?  What are the cautions?
  • 8. 1. Identify the important concepts 2. Choose keywords 3. Pick synonyms and related terms 4. Think about using quotes, truncation, Boolean 5. Choose a search engine 6. Read the instructions (most rules are the same, but not all) 7. Enter your search expression 8. Evaluate the results 9. Modify/narrow your search (if needed) 10. Move to a new search engine (if needed)
  • 9. Crucial because of fluidity/lack of standards  Some possible criteria for any source: • Who wrote or created the source? • What audience was the source written for? • Where did you (or can you) find the source? • When was the source written or created? • Why was the source written? • How can you verify the information contained in the source?  Look carefully at URL (.com, .edu, etc.)