Search Yahoo With Boolean Operators

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Search Yahoo! With Boolean Operators

• AND, OR, (), , NOT, Domain

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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?

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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)

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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

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Search Engine Features Chart

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

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Why Boolean Operators?

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

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AND (quotations)

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

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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

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More Keywords

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

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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)