IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval Document Length chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. V-55 Request QBlO Computerized information systems in [OCRerr]ields related to cherni[OCRerr]try. Relevant Document 09, ising Abstracts Matching Concepts, and weights in document - Computerized ([OCRerr]) Total Concepts in Document - Inforniaticn (1) [OCRerr]otal Concepts in Request 5 - Fields (1) Total Concepts that match 5 - Related (1) Cosine Numeric Correlation 0.5622 - Chemistry (i) Rank position Relevant Document 09, Using Full Text Matching Concepts, and weights in document - Computerized (1?) Total Concepts in Document 111 - Information (S) Total Concepts in Request 5 - Fields ([OCRerr] 1/2 Total Concepts that match 5 - Related (1) Cosine Numeric Correlation c.3736 - Chemistry (ic 1/[OCRerr]) Rank position 2 Non-relevant Document 76, Using Full Text Matching Concepts, and weights in document - C[OCRerr]mputerized (3) Total Concepts in DocumeRt 110 - Information (36) Total Concepts in Request 5 - Fields (10) Total Concepts that match 4 - Related (1) Cosine Numeric Correlation 0.3910 Rank ?osition 1 Analysis of Request [OCRerr]l0, relevant document 09 and non-relevant document 76, comparing abstract and full text results, thesaurus, ADI CoUection. Figure 38.