Discusses user preferences for the representation, interpretation, and measurement of the relevance or usefulness of retrieved documents. Highlights include measurement of user judgments on documents; distance between rankings; measures of retrieval effectiveness; normalized performance measure; and the relationship of distance-based measures to…

Provides statistical summaries of database development and growth for 1979, based on the "Database of Databases" file at the University of Illinois Information Retrieval Research Laboratory. Bibliographic, bibliographic-related, and natural language databases are analyzed in four subject categories: scientific/technical, humanities,…

Describes the methodology and results of a study comparing the overlap of Enviroline, Pollution, and the Environmental Periodicals Bibliography files through searches on acid rain, asbestos and water, diesel, glass recycling, Lake Erie, Concorde, reverse osmosis wastewater treatment cost, and Calspan. Nine tables are provided. (RBF)

Two tables compare projected costs of online versus offline retrieval of citations from 50 databases using BRS and DIALOG. Data include database; databank; cost of access per hour; cost of 15-minute search with no retrieval; and cost of 15-minute search plus cost of 10 and 30 online or offline citations. (CLB)

Presents MARC database statistics for use in planning and processing files, selection of subsets, and estimating file growth rates. Statistics are provided on record length, field tag occurrence, data element length per field tag, and distribution of records by Dewey Decimal Division and Library of Congress class code. (Author/RAA)

Exploring the use and effectiveness of current awareness (CA) methods, especially selective dissemination of information (SDI) among chemists at Canadian universities, this study focuses on the perceived dispersal of information, use of various CA methods, time spent on CA, perceived success in CA, and CA efficiency. (FM)

Describes method of generating Electronic Yellow Pages mailing labels using DIALOG commands which involve downloading to disk and interposing a BASIC language program between disk and printer. Downloading problems (accession numbers, "tic" which DIALOG provides, line noise), two versions of program (full, compressed), and output examples…

Discussion of users and information retrieval systems highlights a study that investigated the representation of users' knowledge by examining their names for objects and concepts, agreement on names, the Library of Congress Subject Headings representation for similar objects and concepts, and measurement of the similarity between these…