Critical Analysis

The SciFinder Scholar (SFS ) search system was developed by chemic AbstractsService (CAS ) and has been marketed to academic institutions since 1998 .1 SFS is an elegant search interface to six derive of money chemical related databases : CAplus , the main Chemical Abstracts books database , CAS registry , the substance database , CASREACT , providing access to reactions from the journal literature and patents , CHEMLIST , the regulatory chemicals database , CHEMCATS , lean suppliers of commercially available chemicals worldwide , and the complete matter depository library of Medicine s (NLM ) MEDLINE database back to 1950 containing over 15 million references p The natural language query (NLQ ) touch algorithmic rules involved in the SciFinder Scholar (SFS ) include prepositions , Boolean operators abbreviations , and automa tic brusqueness . The high hat results are obtained by liberal handling of prepositions , for example , `use of antibiotics to prevent diseases in cows . SFS recognizes prepositions , does non analyze their lingual meaning , and uses them to break the query into component concepts . No truncation symbols are recognized . Boolean operators AND , OR , and NOT are not treated as Boolean operators , but alternatively as conversational side .

However , once the NLQ algorithm identifies query concepts and performs the search , Boolean logic is apply to grow the pick list of the miscellaneous search results presented to the user . Parentheses digest only be used to specify up to tri o synonyms separated by commas aft(prenomin! al) a given landmark . An example of this syntax would be `paints (coatings ) which are fire retardent (flame resistant , intumescent .Case is ignored . inquisitory `AIDS or `acquired immune deficiency syndrome generates identical results . as well as ignored are single and repeat quotes Given the coat and technical nature of the database , querywords are not run against a spelling checker , except for whatever of the most common misspellings1 . Somerville , A . N . SciFinder Scholar . J . Chem . Educ . 1998 , 75 , 959 975-976...If you involve to get a full essay, bless it on our website: OrderEssay.net

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