Discussion of a new method of index term dictionary compression in an inverted-file-oriented database highlights a technique of word coding, which generates short fixed-length codes obtained from the index terms themselves by analysis of monogram and bigram statistical distributions. Substantial savings in communication channel utilization are…

In order to demonstrate how online databases can be used to provide a picture of the state of research in a discipline, an online search was performed in PSYCHINFO to determine the frequency of publication of articles focusing on some aspect of cognitive development during 1976, 1978, and 1980 in six representative journals. (7 references)…

Defines and discusses bibliometrics, particularly as carried out in automated systems. The specific requirements to which data should conform to support bibliometric analysis are detailed and explained, and the Intelligent Gateway of the Lawrence Livermore National Laboratory is described. (15 references) (Author/CLB)

A common command language has been proposed for use by systems designers and those developing new user interfaces. There is controversy over the appropriateness of a standard command language, and those who are working in artificial intelligence believe that natural language interfaces will make it unnecessary for users to learn such a language,…

Online searching is now a recognized specialization in library schools, but there are certain problems involved with offering online courses. There is a large amount of material to be covered, especially in one course. Students must learn new concepts and make them work in a machine environment. It is difficult to offer suggestions for a fruitful…

Describes a computerized information retrieval system that uses three agglomerative hierarchic clustering algorithms--single link, complete link, and group average link--and explains their implementations. It is noted that these implementations have been used to cluster a collection of 12,000 documents. (LRW)

Discusses the effects of microcomputers on online services and products from the perspectives of the major participants in the online industry--database creators and providers; service or network operators; libraries and information brokers; and end users. Ongoing developments and trends affecting participant groups are reviewed. Three references…

This manual provides electrical and electronic engineers with an introduction to online information retrieval as implemented on the DIALOG information retrieval system. Sections cover: (1) the development of computerized information retrieval; (2) its advantages; (3) the equipment needed, DIALOG hours of availability, methods of access, and cost…

Presents a mathematical theory that can be used to define concentration places of objects within unordered classes. The application to research on the evolution of journals and subject areas is illustrated, and an online method of calculating concentration evolution is described. (1 references) (CLB)

Reviews the literature on online bibliographic databases for secondary sources in history. The effect of online databases on the reference process is discussed, and the principal databases in the field are introduced. Areas for future research are suggested, and 23 references are listed. (Author/MES)

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)

A reference guide for online bibliographic searchers introduces and explains the major computer-searchable fields of the Educational Resources Information Center (ERIC) database, presents field access labels or commands of three online ERIC database vendors--BRS, DIALOG, and ORBIT--and lists the codes necessary for searching particular ERIC…

A project at the ERIC Clearinghouse on Information Resources has resulted in the extension of the ERIC database to microcomputer. Small subject-related files for current-awareness purposes are downloaded from the ERIC tapes and are made available for searching with Apple II Plus microcomputers. Since the target audience for this system is…

Designed to characterize journals as part of the selection process for journals to be included in an information retrieval database, two studies used bibliometric techniques to examine patterns of publishing and topic patterns and coverage, and a third developed a rule-based system to evaluate the qualities of a journal. (CLB)

Reports the results of a study which examined costs and search results for 20 searchers conducted on both BRS After Dark and Knowledge Index. Various features of the two retrieval systems are reviewed, and advantages and disadvantages of each system are summarized. Data are presented in one table and several graphs. (24 references) (MES)