Demonstrates a means for estimating the number of retrieved items using well-established selective dissemination of information (SDI) profiles in the SCI, INSPEC, ISMEC, CAS, and PASCAL databases. A correlation between individual database size and number of retrieved documents in technical fields is also examined. (17 references) (LAE)

Describes the differences between English and Chinese information retrieval and the problems with Chinese character entry and encoding. It is argued that regular expression searching facilitates Chinese character entry and retrieval. Mathematical models are developed for controlling noisy characters retrieved by regular expressions containing…

Describes the files contained in the Cystic Fibrosis (CF) database and discusses educational and research opportunities using this database. Topics discussed include queries, evaluating the relevance of items retrieved, and use of the database in an online searching course in the School of Information and Library Science at the University of North…

Reviews the use of artificial intelligence research techniques to create tools that can assist with ongoing library functions and with information skills both within and outside of the library setting. Major areas discussed include cataloging, indexing, database searching, reference services, knowledge acquisition and representation, user…

Describes study conducted at Chicago Public Library's Computer-Assisted Reference Center (CARC) that examined patron's evaluations of their online searches and the search service provided. The relationship between user satisfaction and relevance, precision, and recall is highlighted, and suggestions for future research are offered. (40 references)…

This study examined the experiences of 59 novice end users with a multifile, full-text information retrieval system. A regression model was developed of the relative contributions of computer, system, and subject knowledge to search success as measured by user judgments of the relevance of retrieved documents. Results indicated all three variables…

A study investigated the relationship between the completeness of end users' mental models of an online system and their ability to use the system effectively. Although all of the study subjects were relatively successful, those with more complete mental models tended to have better search results than subjects with incomplete or poor mental…

Describes analyses of 3 searches conducted in an academic library by 11 novice users of full-text databases. The study examined affective search behavior, search strategies, and searcher assessments of retrieved material. Results of interviews, transaction log analysis, and audiotape recordings of search sessions are discussed, and further…

Describes four studies that explored how search experts and domain experts conducted searches in full-text, end-user search systems. Problem definition/expectation; query formulation; examination and extraction; reflection, stopping, and search monitoring; and system effects are examined for each study. (26 references) (EA)