Describes a method for advance estimation of user charges for queries in relational data model-based numeric databases when charges are based on data retrieved. Use of this approach is demonstrated by sample queries to an imaginary marketing database. The principles and methods of this approach and its relevance are discussed. (MBR)

Description of a general purpose microcomputer database management package covers assist and program mode; performance (set-up and loading, data entry, editing, ease of use, report generators, data manipulation, searching a database, file handling utilities, user interface, memo fields, date operations, multi-file processing, command files, error…

Library use and user studies (1973-1981) indexed in ERIC database were analyzed to ascertain areas in need of research as characterized by Tobin. Since 1972, most research conducted has been in large-scale studies and use of nonprint materials; use of government documents and library staff needs remain unresearched areas. (35 references) (EJS)

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)

Argues that there are two flaws in Byrne's research design which indicates that Australian journal literature is not adequately represented in international databases: mixing of analysis levels and the implied assumption that a database that doesn't cover large numbers of journals published in a country has "lost" that country's…

Discusses the relationship between information science research and practice and briefly describes current research on 10 topics in information retrieval literature: vector processing retrieval strategy, probabilistic retrieval models, inverted file procedures, relevance feedback, Boolean query formulations, front-end procedures, citation…

Reviews and compares "Sci-Mate,""Reference Manager," and "BIBLIOPHILE" software packages used for storage and retrieval tasks involving bibliographic data. Each program handles search tasks well; major differences are in the amount of flexibility in customizing the database structure, their import and export…

Presents a description of Act I, the newest database from Data Courier, Inc., which provides an online directory of computer related companies and products. Highlights include content, applications, most useful features, classification code/classification name, and output. A sample record, journals list, and database specifications are included.…

The results of manual and online searching are compared during a unit on online chemical information retrieval taught at Hebrew University. Strategies and results obtained are provided for student searches on the synthesis of vitamin K(3) from 2-methylnaphthalene and polywater. (JN)

Discusses microcomputer software designed specifically to be used in the online bibliographic database search process. The specialized communications software discussed includes programs that aid in database selection, logging on, uploading, searching, downloading, post-processing, and recordkeeping. A directory of specialized communications…

Describes an expert system which provides users who have information needs with terms to express search queries; introduces principles on which the system's behavior is based; describes the system's main procedures and decision rules; presents an example of system use; and outlines possible improvements in system search and evaluation procedures.…

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…

Examines the changing role of controlled vocabulary in the postcoordinate online search, particularly its current role in the formulation of online search strategies. Effects of controlled vocabulary searching on precision and recall and examples of concept "hedges" from the "Thesaurus of ERIC Descriptors" are discussed. Nine…

This article expresses concerns about online searches being run by inexperienced searchers or nonchemists for other nonchemists or students. Studies concerning problems in the use of Chemical Condensates Database, Chemical Abstracts, Medline, and patent information are highlighted. Examples of searches yielding unsatisfactory results are noted.…

In this second of five course installments, key terms in an up-to-date definition of "subject access"--access, collection of items, search words, vocabulary, index or catalog records, related words or clues, file--are identified, and their part in providing subject access in both traditional and computer-based services are discussed.…