In this paper, we propose a syntax-based text retrieval system for on-line language learning and use a fast regular expression search engine as its main component. Regular expression searches provide more scalable querying and search results than keyword-based searches. However, without a well-designed index scheme, the execution time of regular…

Describes the concept of maximum indexing, a system aimed at achieving maximum recall and maximum precision in computerized information retrieval. The indexing strategies used to achieve maximum indexing and the problems that arise are discussed. (9 references) (CLB)

Discusses alternatives to the Boolean system that would enable users of online bibliographic databases--primarily those containing scientific and technical information--to obtain their required level of performance at lowest cost. Highlights include recall and precision factors (natural and controlled language, titles, abstracts, quorum function)…

Compares and evaluates the databases covering the literature of sports and recreation. Discusses information scatter in the discipline, exhaustivity of coverage within particular databases, and search strategies, vocabulary control, and database overlap. Included are nine data tables and four appendices illustrating search results. (JL)

Describes the development of a method for the evaluation and comparison of interactive information retrieval systems, which are based on the concept of a simulated work-task situation and the involvement of real end users. Highlights include real and simulated information needs; relevance assessments; and the dynamic nature of information needs.…

Describes a study conducted at Oregon Health Sciences University that compared the use of three retrieval systems by medical students: a Boolean system, a word-based natural language system, and a concept-based natural language system. Results showed no statistically significant differences in recall, precision, or user preferences. (Author/LRW)

Outlines a view of the changing framework for information retrieval suggested by the Web environment. Speculates about how some of these changes may manifest in upcoming generations of information retrieval systems. Sketches ideas about the broader context of trust management infrastructure that will be needed to support these developments, and…

Examines use of online access to bibliographic files in library reference service, focusing on two systems: OCLC and Research Libraries Information Network (RLIN). The development and current status of each system, differences between systems, search examples, user expectations, and advantages of online access are noted. Twenty references are…

Compares database update currency, number of hits, elapsed time, number of offline prints or online types, offline print turnaround time, vendor rates, total search cost, and discounted search cost based on vendor discount rates for five simple searches run on three major commercial vendors' online systems. (CWM)

Examines the relative benefits and searching philosophies of five major search systems (DIALOG, ORBIT, BRS, NLM, and DOE/RECON) as a selection aid. Differences in command language, full text searching capability, use and expression of Boolean operators, and searching mechanisms are discussed, and comparison charts and system/database comparisons…

Examines the effectiveness of online searching for embedded stories, poems, essays, and other literary works in the Magazine Index and Modern Language Association Bibliography databases. Strategies and results of 16 test searches set up to test the access capabilities of the two databases are profiled. (SW)

Issues involved in integrating new methods of bibliographic and physical access with old ones to create a unified system of periodical article access and identification are identified. Desirable characteristics of a system, a possible model, and suggestions for further research are presented. (Author/JKP)

Eurostat, the Statistical Office of the European Communities, is already making use of the new possibilities offered by the multimedia revolution and has started research to allow further progress in this direction. This paper defines interactive multimedia as the achievement of a dynamic symbiosis between several means of expression (several…

This paper presents the background and then reports progress made in the development of two view-based searching systems--HIBROWSE for EMBASE, searching Europe's most important biomedical bibliographic database, and HIBROWSE for EPOQUE, improving access to the European Parliament's Online Query System. The HIBROWSE approach to searching promises…

The Internet has brought about a revolution in the concept of information provision for end-users, and opened up a diverse new market. The Internet has challenged the need for and role of traditional online services. Despite the benefits of the Internet, users face a number of dilemmas: finding needed information in a vast sea of information; time…