Selected computerized current awareness services and literature searches in the physical sciences are listed. The information given includes type of literature in each data base, time period covered, prices, and sources of availability. (1 reference) (Authors)

Cost simulation models offer an important new tool for colleges and universities struggling with new demands for greater efficiency and accountability. However, there are many approaches to modeling, a variety of models available to planners, and confusion in the minds of administrators about their use. This article capsules the proceedings of a…

A high degree of constancy has been found in the microstructure of titles of samples of the INSPEC data base taken over a three-year period. Character and digram frequencies are relatively stable, while variable-length character-strings characterizing samples separated by three years in time show close similarities. (2 references) (Author/SJ)

Situationally relevant items of information are those that answer, or logically help to answer, questions of concern. Significant situationally relevant information is explained in terms of changes of view in relation to questions of concern. It is claimed that situational relevance is an explication of the ordinary notion of practical relevance.…

The base'', means of access, indexing, storage, input costs and retrieval are discussed as factors that must be considered in comparing information systems. (2 references) (Author/KE)

To index at the Defense Documentation Center (DDC), an automated system must choose single words or phrases rapidly and economically. Automation of DDC's indexing has been machine-aided from its inception. A machine-aided indexing system is described that indexes one million words of text per hour of CPU time. (22 references) (Author/SJ)

The inverse relationship of recall and precision is not a fundamental law. It must not be used as an excuse for failing to bring about any overall improvement in the performance of information retrieval systems (12 references) (Author/NH)

The author emphasized that one cannot conclude from the experiments reported upon that term clusters (or equivalently, keyword classifications or thesauruses) are not useful in retrieval. (2 references) (Author)

The simulation model described is used as a tool for designing and evaluating literature search systems. The simulation program creates a well specified collection of documents and analyzes the effect of charges in query file characteristics on system output performance. (14 references) (Author/KE)

A preliminary investigation which revealed the omission of four full length articles on rheumatology from Index Medicus'' is reported upon. Further investigations are in progress and will be reported at a later date. (Author/SJ)

Conversion of the Chemical Abstract Service scientific literature data base from Standard Distribution Format to a center-oriented file format, STF, is described. A tape file format is described in which variable length logical records, possibly longer than the blocksize, may be stored safely. (7 references) (Author/NH)

Patents are clustered by similar cited-by" patterns using MacQueen's algorithm. The clusters are enriched by the addition of citing patents. These maximally connected clusters, or cliques, form the classification. (27 references) (Author)

While scientific progress has developed toward interdisciplinary and broad-scope technologies, information resources have become increasingly fragmented and specialized. What is needed is more attention to the intellectual input and output of information systems, focusing on actual user needs. (2 references) (Author/NH)