Sunday, January 19, 2014

Interpretation

The SciFinder Scholar (SFS ) depend system was developed by chemical substance AbstractsService (CAS ) and has been marketed to academic institutions since 1998 .1 SFS is an elegant search interface to six core chemical related databases : CAplus , the main Chemical Abstracts literature database , CAS bullion register , the substance database , CASREACT , providing access to reactions from the journal literature and patents , CHEMLIST , the regulative chemicals database , CHEMCATS , lean suppliers of commercially available chemicals worldwide , and the complete content depository library of Medicine s (NLM ) MEDLINE database back to 1950 containing over 15 million references p The natural language query (NLQ ) bear on algorithmic rules involved in the SciFinder Scholar (SFS ) include prepositions , Boolean operators abbrevi ations , and automatic shortness . The shell results argon obtained by good-looking utilize of prepositions , for example , `use of antibiotics to prevent diseases in oxen . SFS recognizes prepositions , does non analyze their lingual meaning , and uses them to break the query into persona concepts . No truncation symbols are recognized . Boolean operators AND , OR , and NOT are not treated as Boolean operators , but sooner as conversational English .
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however , once the NLQ algorithm identifies query concepts and performs the search , Boolean logic is used to concede the pick list of the various search results presented to the user . Parentheses arsehole only be used to re store up to troika synonyms separated by co! mmas after a given terminus . An example of this syntax would be `paints (coatings ) which are fire slowdown (flame resistant , intumescent .Case is ignored . Searching `acquired immune deficiency syndrome or ` assist generates identical results . Also ignored are single and doubling quotes Given the size and technical genius of the database , querywords are not run against a spelling draw , except for rough of the most common misspellings1 . Somerville , A . N . SciFinder Scholar . J . Chem . Educ . 1998 , 75 , 959 975-976...
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