Reviews selected research on the performance of bibliographic and full-text databases. A mathematical model for clarification of the relationship between user behavior and the performance measures of recall and precision is presented. (five references) (MES)

Describes a new signature file method, called the multiorganizational scheme, for accessing information from large databases containing both formatted and free-text data. Implementation issues are discussed, and computational results based on a mathematical model are presented, as well as results using a library database. (43 references) (MES)

Reviews the literature that examines new capabilities and new problems associated with online catalogs, online searching of bibliographic databases, indexing, full text retrieval, and expert systems. The need for research that focuses on individual needs and that adopts an integrated approach which views indexing and retrieval as interrelated…

Based on evaluations of 1,025 CD-ROM products, this article summarizes trends in (1) growth of commercially available CD-ROM titles; (2) types and subjects of products produced; (3) update options; (4) hardware systems CD-ROMs are designed to run on; (5) prices; and (6) multimedia products. Possible future developments that could revolutionize…

Describes techniques used for information retrieval from free-text or document databases and presents a new approach based on signature files, or representations of documents, called the Map Array Signature (MAS) method. False drops are discussed, and results of experiments are compared to Robert's Superimposed Coding method. (20 references) (LRW)

Reviews methods of text segmentation for Chinese text retrieval systems, including single character-based approaches and multicharacter-based approaches; discusses problems of Chinese text segmentation, including morphological complexities, ambiguity of segmentation, and natural language parsing problems; and suggests further research. (Contains…

Suggests ways in which the Internet can supplement traditional methods of professional development for librarians. Examples include electronic journals, discussion groups, electronic courses, electronic conferences, e-mail, networking, and coauthoring via the Internet. Services listed include Internet directories, education gophers, bibliographic…

Identifies four categories of end users, based on their searching ability and knowledge of their subject area. The role of the librarian or information specialist in assisting each category of users to fully benefit from online full text databases (FTDs) discussed. (30 references. (CLB)

Describes some of the problems encountered in full text searching and suggests ways to overcome them. Areas discussed include differences between online and offline versions of full text; lack of precise and flexible indexing; software inadequacies; record displays; typographical errors; and problems with both global and source searching. (six…

Describes a study in which several different sets of hypertext links are inserted by different people in full-text documents. The degree of similarity between the sets is measured using coefficients and topological indices. As in comparable studies of inter-indexer consistency, the sets of links used by different people showed little similarity.…

Describes a study that was conducted to explore the potential of text analysis as a tool in full-text search and design improvement. A review of pertinent literature is included, and a trial analysis performed in the domain of family history literature is described. (Contains 49 references.) (LRW)

Describes compression methods for components of full-text systems such as text databases on CD-ROM. Topics discussed include storage media; structures for full-text retrieval, including indexes, inverted files, and bitmaps; compression tools; memory requirements during retrieval; and ranking and information retrieval. (Contains 53 references.)…

Describes a study that tested the effectiveness of a thesaurus as a search-aid in free text searching of a Finnish full text database. Linguistic and conceptual approaches are discussed; five search modes are explained; recall and precision are examined; and the use of proximity operators is discussed. (Contains 29 references.) (LRW)

Explores the use of visualization to enhance the information retrieval process, particularly in bibliographic retrieval systems. Topics discussed include document retrieval systems; human visualization; the VIBE (VIsualization by Example) system, a prototype system for visualizing a collection of documents; and differences between VIBE and more…

Describes a survey of 33 Research Libraries Group (RLG) academic libraries that was conducted to determine the extent to which they were involved in the use, collection, and support of machine-readable text files used in textual analysis. A selected bibliography of research in computer-aided textual analysis is included. (69 references) (LRW)