This study of ranking algorithms used in a Boolean environment is based on an evaluation of factors affecting document ranking by information retrieval systems. The algorithms were decomposed into term weighting schemes and similarity measures, representatively selected from those known to exist in information retrieval environments, before being…

Two computer data bases have been developed by the Computer Science Department at the University of Western Ontario for "Information London," the local community information center. One system, called LONDON, permits Boolean searches of a file of 5,000 records describing human service agencies in the London area. The second system,…

This evaluation of Predicasts' PROMT megafile and its implications for online searchers includes a comparison of sample searches of company and product data in PROMT and a control database, a critical evaluation of company documentation, and a survey of PROMT users. (CLB)

Responses to a survey from the acquisition coordinators in 15 of the 16 ERIC clearinghouses indicate that the acceptance rate for unsolicited manuscripts averages approximately 50 percent, and that academic credentials of their reviewers and their selection criteria either parallel or are very similar to those of traditional refereed journals. (9…

References indexed for Australian Education Index (AEI) were sampled and compared where possible with same references indexed for ERIC and Australian Public Affairs Information Service (APAIS) databases. An analysis of coverage of Australian references reveals indexing consistency figures of 22 percent for ERIC/AEI and 18 percent for AEI/APAIS.…

Describes the experiences of the American Society for Training and Development library with the CD-ROM version of ERIC. The following topics are discussed: (1) installation of the CD-ROM system; (2) CD-ROM vs. online searching; (3) cost/benefit of CD-ROM; (4) patron response; and (5) future plans. (1 reference) (MES)

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)

Four databases--PsycINFO, ERIC, Health Planning and Administration, Public Affairs Information Service--were examined to determine percentage of business journals indexed and degree of business terminology included in controlled vocabulary. Sample searches were compared to same search in Management Contents and ABI/INFORM. A list of business…

Identifies characteristics of the experienced online searcher and discusses the results of three searches carried out by a variety of searchers in widely differing subject fields--presence of arsenic in coal, problems of working alone in laboratory or work area, and spectral sensitivity of the insect eye. (8 references) (EJS)

Second article in a three-part series focuses on enhancements of search commands and features in the DIALOG and QUESTEL information systems. Highlights include system responses and capacities (aids to searching); search commands and features (proximity searching, field specification, limits); concatenating complex requests; and saving search…

This paper serves as an example of how one may approach the use of a large database for comparative education purposes. Considerations include determining three aspects about the databases, and one case study. The three aspects include the type of database that is used, the method in which the data were collected and errors, and the structure of…

This comparison of three major bibliographic utilities, prepared at the University of Oregon, provides evaluative information to members of the university community contemplating the use of their services. Included are basic characteristics, resource sharing, technical processing, and public services. (RAA)

Reports the results of a study that examined four databases, AGRICOLA, BIOSIS, CAB, and SCISEARCH, to determine their overlap with regard to agricultural and forestry literature. Relative strengths and weaknesses were assessed concerning subject coverage, timeliness, and searching capabilities. (Author)

Considers the quality of bibliographic control achieved by the three online databases offering significant coverage of the literature of librarianship: ERIC, LISA, and Library Literature. Focusing on coverage and indexing, the study compares online search results with the tables of contents of 67 journals and reports the results. (27 references)…

Describes the availability of databases held on DIALOG, ESA-IRS, and DATA-STAR. Database overlap among the systems, prices, database contents, and data transmission costs are addressed; and results of a search of the ENVIROLINE database on each system are presented. The appendix lists subjects referenced on each system and compares database…