The design of programs to search large document data bases is discussed with regard to the use of compression coding combined with adoption of word fragments as the basic language elements. An algorithm is described for determination of a set of almost equifrequent fragments. Its efficiency is tested. (23 references) (Author)

Automatic processing of the bibliography on vapor-liquid equilibrium data is done by means of a specially developed mnemonic coding system. (Author/JB)

The boundary between two neighboring rings is called the fusion lines, which is enclosed by external segments called arcs. In the code, the separation of fusion line(s) from arcs takes place in such a way that proper matching is achieved. By this procedure, the structure of a compound is recreated. (Author)

This article presents a proposal for a coordinated community recreation planning system, which includes an information storage, retrieval, and display system designed to assist a coalition of agencies in the decision-making process. (JA)

The problem of the direct and inverted forms of adjective-noun subject headings which contain national adjectives is reexamined. A pattern based on subject categories is discovered which is different from the pattern based on work-frequency discussed in Harris' Subject Analysis. (11 references) (Author)

The distribution of bond-centered fragments which form a simple hierarchy have been investigated for a sample of substructure search queries. They are found to conform with the general pattern of fragment incidences in a file which might be used in a substructure search system. (8 references) (Author)

There is evidence which suggests that users' attitudes toward on-line interactive retrieval systems may be multi-dimensional. Because this earlier work was based upon factor analysis of the data, it was essential that a replication be attempted. To this end a previous study with a new population of users was repeated. (2 references) (Authors/SJ)

The cost-performance evaluation of an on line free-text bibliographic retrieval system, SUPARS, is reported. Two measures of cost were used in the evaluation: a computer processing charge expressed in dollars, and the number of documents retrieved. The measure of performance was an estimate of the recall ratio. (11 references) (Author/SJ)

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.…

An experiment to compute and analyze the degree of association between descriptors used to index a document collection of approximately 40,000 records is described. An analysis of the results is presented which indicates the difficulties inherent in applying the results to an operating system. (11 references) (Author)

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)

This study proposed to develop techniques and procedures for the indexing, storing, and retrieving music education document information in a computer-assisted information retrieval system. (Authors)

A new testing process is described. The design of the test procedure is covered in detail, and the several language processing features incorporated into the SMART system are individually evaluated. (20 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)