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A COMPOSITE MEASURE FOR WEIGHTING DATABASES IN DEFENSE, ENGINEERING, AND SCIENCE (MULTIDATABASE SEARCHING, ONLINE SEARCHING, DIALINDEX).


Description

The primary problem of this dissertation is to propose a composite measure as a technique for measuring the relevancy of databases. The databases are characterized as single units by the measure of closeness, C(,M), values. The measure of closeness consists of two weighted factors: (1) a relevance factor, and (2) a descriptive factor. The relevance factor is the sum of the recall and precision ratios. The descriptive factor is the sum of the weighted properties of each file as follows: (1) subject coverage, (2) thesaurus strength, (3) technical level, (4) subject coding, and (5) length of years searched retrospectively.