Variety-generator approach seeks to reflect the microstructure of data elements in their description for storage and search, and takes advantage of the consistency of statistical characteristics of data elements in homogeneous data bases. (Author)

Swets' theory of information retrieval allows the threads of document weighting formulae, probabilistic measures of effectiveness, and management theory, to be woven into a coherent pattern. Benefits are: the beginnings of a quantitative description of retrieval languages; destinction between retrieval systems and language; and question generality…

A survey of the data bases used in satisfying some of the information requests received by the Bell Laboratories literature searching service revealed that 58 information sources were used 305 times and that 4 major sources accounted for 155 (51 percent) of the uses. (Author/JB)

The proposed Index takes into account the interdependencies between the measured variables and the relative value placed on these variables by the system evaluator. (Author/JB)

Understanding of the communications process centers generally around the conduct of the process rather than the content, and particularly the establishment of communication channels. The communications model has three generally agreed upon components: source, channel, and destination. Destination may include questions about the nature of things,…

THE MAIN OBJECTIVES OF THE ANALYSES INCLUDE--(1) A RESEARCH STUDY OF TECHNIQUES FOR THE EVALUATION OF ASSOCIATIVE AND COORDINATE MESSAGE RETRIEVAL METHODS. (2) THE PREPARATION AND ANALYSIS OF MACHINE-READABLE TEST CORPORA SUITABLE FOR EXPERIMENTS WITH ASSOCIATIVE MESSAGE RETRIEVAL METHODS. THESE CORPORA CONSIST OF APPROXIMATELY 10,000 MESSAGES AND…

REQUIREMENTS OF A PILOT INFORMATION SERVICE FOR EDUCATIONAL RESEARCH WERE INVESTIGATED BY ISOLATING THE CHARACTERISTICS OF DOCUMENTS JUDGED RELEVANT BY QUESTIONERS (USERS). IN ADDITION, RETRIEVAL STRATEGIES WERE COMPARED ON THE BASIS OF THE RELEVANCE AND RECALL FACTORS FOR EACH STRATEGY. THE FOLLOWING CONCLUSIONS WERE REACHED--(1) IN PROGRAMING…

Examples are given of the kinds of machine-readable data bases that should be developed in order to extend attempts at universal bibliographical control into neglected areas, the results of which can be used by researchers in the humanities, specifically those using books printed before 1801. The principles of bibliographical description,…

Designed to be of assistance to the new ERIC user, this glossary provides brief definitions of more than 60 terms associated with the ERIC data base and the search process. These include titles of indexes, agencies, and acronyms peculiar to ERIC as well as terms used to describe computer search strategy. A directory of ERIC network…

THIS APPENDIX TO THE FINAL REPORT OF THE AIP/UDC PROJECT (LI 000 583) INCLUDES THE COMPLETE, MERGED SET OF UDC SCHEDULES ACCUMULATED BY THE AIP/UDC PROJECT FROM 1965-1967. PART 1 OF THE FILE CONTAINS 110,759 RECORDS. EACH RECORD INCLUDES THE UDC NUMBER, A CODE WHICH REPRESENTS THE SOURCE OF THE RECORD, AND THE ENGLISH LANGUAGE EQUIVALENT OF THE…

This set of information sheets on the Educational Resources Information Center (ERIC) is designed for use by persons responsible for instructing potential ERIC users and contributors. Adaptable for reproduction as overhead projection transparencies, the sheets are classified in two dimensions to provide for greater flexibility. The set of 50…

This primer is intended to acquaint public, academic and special librarians with the current state of the art in microform technology. Brief discussion is given of the advantages and disadvantages, economics, reading and printing capabilities, continuous and unitized microforms and the various analogies of microfilm technology to other technology.…

The development and testing of the Browsing On-line With Selective Retrieval (BROWSER) text retrieval system allowing a natural language query statement and providing on-line browsing capabilities through an IBM 2260 display terminal is described. The prototype system contains data bases of 25,000 German language patent abstracts, 9,000 English…