Roger Mills

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• Roger Mills
• February 2007

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dont be evil
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stand on the shoulders of giants
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beta
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• Launched Nov 2004
• Still beta
• (Relatively) rapturously received
• Relationship cooled a bit
• Secrecy (still) dont know
• Coverage
• Publisher agreements
• Ranking algorithms
• Classification assigned

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The difference

• Reaches behind payment/password walls
• But only by arrangement with publishers
• Many publishers make some content free anyway
  which can be found on normal Google

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Added value

• Fast and free
• Available to anyone, anywhere, any time
• Non-scholarly material excluded
• Relevance ranking
• Identifies other versions
• Citation data
• Library holdings via OpenURL
• Full text where library subscribes
• Broad context classification
• Automatic correction of search terms
• Direct import to RefWorks and EndNote

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But no

• Set creation
• Combining searches
• Saving and e-mailing results
• Creating alerts
• Controlled vocabulary
• Proximity searching
• Standardisation of journal names/abbreviations
• Info on what is included and what is not
• Indication of update frequency seems slower
  than normal Google
• Info on how the system decides what is scholarly
• Hit rate figures for individual search terms

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Whats in it?

• Google Scholar provides a simple way to broadly
  search for scholarly literature. From one place,
  you can search across many disciplines and
  sources peer-reviewed papers, theses, books,
  abstracts and articles, from academic publishers,
  professional societies, preprint repositories,
  universities and other scholarly organizations.
  Google Scholar helps you identify the most
  relevant research across the world of scholarly
  research.

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Only in Beta

• Features may change
• Developing in tandem with Google Books, which
  will include digitised texts from Oxford
  collections and others
• In competition with WoK, ScienceDirect, SCOPUS,
  Scirus etc

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Content

• Algorithm to identify scholarly materials crawled
  by Google from the open web
• Access to materials locked behind subscription
  barriers
• Must include abstract
• Full-text access requires institutional
  subscriptions or individual payment
• Includes peer-reviewed papers, theses, books,
  preprints, abstracts, full-text, citations, etc.

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Library links

• Includes OpenURL links to local library holdings
• In Oxford displays as Oxford Full Text beside
  title

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Includes citation data

• Uses citation extraction to build connections
  between papers
• Cited by link lists items (known to Google
  Scholar) that cite the original paper
• Cited items not available online are listed with
  prefix citation
• Citation analysis puts the most-cited papers at
  the top of the results list

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Searching

• AND implied between words as in normal Google
• to include common words, letters or numbers
  that Googles search technology generally ignores
• quote marks to search for a phrase
• minus sign to exclude from a search
• OR for either search term
• author for author search
• intitle to search document title
• restrict by date and publication
• advanced search screen available

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Help screens
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Earlier version
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Biology search glutathione in green Arabidopsis
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WoS
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Exact article in one step
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Scholar phrase search 2005 15 results, this one
at 7
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Scholar phrase search 2006 16 results, this one
first
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Scholar keyword search 20052420 results, this
one at 10
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Scholar keyword search 20064800 results, this
one first
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Google keyword search 200517600 results, this
one first
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Google keyword search 2006169000 articles, this
one first
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Google phrase search 200559 results, this first
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Google phrase search 200686 results, this first
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Scholar 2005 all 7 versions
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Scholar 2005 cited by 2
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Scholar 2006 cited by 14
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WoS 2005 cited by 3
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WoS 2006 cited by 15
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Comparing citations data 2005
X GS
X SC
X GS
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Comparing citations data 2006
X GS
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Citations arranged by most cited
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SCIRUS search engine for science
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Preferred web sources
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SCIRUS phrase search 2 journals, this first 8
other web sources(inc previous versions of this
talk!)
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SCIRUS keyword search 735 journals, this first
6996 others
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SCIRUS

• Very similar functionality to Scholar but can
  also
• Mark records
• Save records
• E-mail records
• SCIRUS searches are included in SCOPUS which
  allows direct export to RefWorks
• SCOPUS and SCIRUS allowing saving in RIS format
  for EndNote

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Biological Abs phrase search exact match in
1note controlled keywords
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Search on controlled terms in Biological Abstracts
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Omitting green, 14 results
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Not including this one, first on Scholar
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Need wildcard arabidopsis-
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Conclusion

• Maintain a balanced diet!
• Five a day
• WoK, SCIRUS, Scopus, subject-specific database,
  Google Scholar

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(No Transcript)
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EXERCISE

• Look for articles on forestry info by Roger Mills
• In Google and Google Scholar, Scirus and Scopus
• Note the differences between phrase and keyword
  searching
• Try using author delimiter in GS