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Search Yahoo With Boolean Operators

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Search Yahoo! With Boolean Operators. AND, OR, (), '', NOT, Domain: ... MSN search and Yahoo which suggests. that each of the four major search engines ... – PowerPoint PPT presentation

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Title: Search Yahoo With Boolean Operators


1
Search Yahoo! With Boolean Operators
  • AND, OR, (), , NOT, Domain

2
Search Engine Coverage Comparison - I
  • Common Search Engines Misconceptions
  • Search Engines index all available content on the
    web
  • They all work in roughly the same way and they
    all deliver similar results
  • If this is true what is the likelihood that
    asite will show up on the first page (top 10)of
    results of all 4 major search providers?

3
Search Engine Coverage Comparison - 2
  • 1.1
  • The study looked at search results from12,570
    random queries on Ask, Google,MSN search and
    Yahoo which suggeststhat each of the four major
    search engineshas a unique ranking approach of
    findingsnot duplicated by the other
    searchengines.
  • Info from A study of Results Overlap and
    Uniqueness Among Major Web Search Engines by
    Spink, Jansen, Blakely, and Koshman published in
    Information jProcessing and Management (2006)

4
Search Engine Coverage Comparison - 3
  • http//ranking.thumbshots.com/
  • Searched Virtual Reality in Google vs. Yahoo.
  • Results
  • Dotsweb sites
  • Blue Dotsweb sites both engines have in common

5
Search Engine Features Chart
  • http//www.searchengineshowdown.com/features/
  • Search engines provide different search
    techniques, different limits, and etc.

6
Why Boolean Operators?
  • Limitations of natural language process (NLP),
    i.e, who is John Kerry does not always work

7
AND (quotations)
  • Virtual Reality Medical Training -
  • Without any Boolean operator 6,200,00 hits
  • "Virtual Reality" AND "Medical Training" -
    70,300 hits

8
OR, , (), adding more keywords
  • ("Virtual Reality" OR Simulation) AND Medical
    Training - 268,000 hitsthis number is larger
    again because we added a synonym
  • NOTE no need to enclose a single word with
    quotation mark ( )
  • ("Virtual Reality" OR Simulation) AND (Medical OR
    Surgical) AND Training
  • - 1,210,000 hitsthis number grew because we
    added another synonym

9
More Keywords
  • Combining keywords with special keywords above
  • ("Virtual Reality" OR Simulation) AND Medical
    Training AND (benefits OR advantages) - 73,500
    hits

10
Domain
  • ("Virtual Reality" OR Simulation) AND Medical
    Training AND (benefits OR advantages) AND
    domaincom -18,500 hits
  • ("Virtual Reality" OR Simulation) AND Medical
    Training AND (benefits OR advantages) AND
    domainorg -11,300 hits
  • (other domains, .com, .org, .gov, and .edu)
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