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Voorhees, Ellen M. – Information Processing and Management, 1986
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)
Descriptors: Algorithms, Cluster Analysis, Databases, Information Retrieval
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Rau, Lisa F. – Information Processing and Management, 1987
Describes the System for Conceptual Information Summarization, Organization, and Retrieval (SCISOR), which is designed to parse and understand short newspaper stories on corporate takeovers. Highlights include issues involved in developing memory organization and retrieval components, theoretical considerations involved in the system design, and a…
Descriptors: Expert Systems, Information Retrieval, Information Systems, Mergers
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Bartschi, Martin – Information Processing and Management, 1985
Presents a general mathematical framework for information retrieval, in which query evaluation is seen as a mapping from the free term algebra built by query descriptors and weights to the semantic algebra of evaluation value. Competing mathematical models that try to describe how retrieval systems behave are reviewed. (Author/MBR)
Descriptors: Algebra, Algorithms, Evaluation Methods, Information Retrieval
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O'Connor, John – Information Processing and Management, 1986
Explains an experiment in text-searching retrieval for cancer questions which developed and used computer procedures (via human simulation) to select search words from medical dictionaries. This study is based on an earlier one in which search words were humanly selected, and the recall results of the two studies are compared. (Author/LRW)
Descriptors: Cancer, Comparative Analysis, Data Processing, Dictionaries
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Strong, Gary W.; Drott, M. Carl – Information Processing and Management, 1986
Explains a new methodology for thesaurus design that is specifically geared for use by novice end-users, and describes a faceted hierarchical thesaurus organization which provides an economical information retrieval system in a corporate setting. (Author/LRW)
Descriptors: Databases, Design, Indexing, Information Retrieval
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Shaw, W. M., Jr. – Information Processing and Management, 1986
Empirical significance of document partitions is investigated as a function of index term-weight and similarity thresholds. Results show the same empirically preferred partitions can be detected by two independent strategies: an analysis of cluster-based retrieval analysis and an analysis of regularities in the underlying structure of the document…
Descriptors: Automatic Indexing, Graphs, Information Retrieval, Relevance (Information Retrieval)
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Cohen, Paul R.; Kjeldsen, Rick – Information Processing and Management, 1987
Describes GRANT, an expert system for finding sources of funding given research proposals. The architecture of GRANT and the implementation of constrained spreading activation (a modified search algorithm based on semantic memory) are described, and recall and precision rates are analyzed. (Author/LRW)
Descriptors: Algorithms, Evaluation, Expert Systems, Grants
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Chiaramella, Y.; Defude, B. – Information Processing and Management, 1987
Discusses expert systems and their value as components of information retrieval systems related to semantic inference, and describes IOTA, a model of an intelligent information retrieval system which emphasizes natural language query processing. Experimental results are discussed and current and future developments are highlighted. (Author/LRW)
Descriptors: Expert Systems, Futures (of Society), Information Retrieval, Information Systems
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Losee, Robert M., Jr. – Information Processing and Management, 1987
Describes an expected precision (EP) measure designed to predict document retrieval performance. Highlights include decision theoretic models; precision and recall as measures of system performance; EP graphs; relevance feedback; and computing the retrieval status value of a document for two models, the Binary Independent Model and the Two Poisson…
Descriptors: Documentation, Feedback, Graphs, Information Retrieval
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Croft, W. Bruce – Information Processing and Management, 1987
Discusses the overlap of research in artificial intelligence and information retrieval, focusing on the papers included in this special issue of Information Processing and Management. Highlights include the emphasis on evaluation and testing in prior research and use of manual and automatic indexing, expert systems, knowledge representation, and…
Descriptors: Artificial Intelligence, Evaluation, Indexing, Information Retrieval
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Wisniewski, Janusz L. – Information Processing and Management, 1986
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…
Descriptors: Algorithms, Database Management Systems, Databases, Information Retrieval
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Eastman, Caroline M. – Information Processing and Management, 1988
Summarizes the similarities between classification systems for catalog selection and information retrieval systems, and discusses system characteristics that allow the use of measures such as recall and precision in system evaluation. (27 references) (Author/CLB)
Descriptors: Classification, Comparative Analysis, Evaluation Criteria, Evaluation Methods
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Blair, David C. – Information Processing and Management, 1986
Discusses indeterminancy of selection of terms by indexers and by inquirers as major factors influencing subject access to documents in document retrieval systems. Five types of interactions between these two indeterminancies are discussed, and a change in traditional method of subject searching is suggested to reduce effect of inter-indexer…
Descriptors: Databases, Indexing, Information Retrieval, Mathematical Formulas
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Salton, G.; Zhang, Y. – Information Processing and Management, 1986
Briefly reviews various methodologies for constructing enhanced document representations, discusses their general lack of usefulness, and describes a method of document indexing which uses title words taken from bibliographically related items. Evaluation of this process indicates that it is not sufficiently reliable to warrant incorporation into…
Descriptors: Automatic Indexing, Bibliographic Coupling, Citations (References), Content Analysis
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Kochen, Manfred – Information Processing and Management, 1984
Explores potential of mathematical theory of communication for information science and examines question of how to encode a message at time it is encountered for subsequent recall. Examples of problem, a prototype computer program and experiment, coding as embedding in associational nets, and nature of information are discussed. (Nine references.)…
Descriptors: Algorithms, Communication (Thought Transfer), Computer Software, Information Retrieval
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