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Using Bitmaps for Medium Sized Information Retrieval Systems.
Peer reviewed Peer reviewed
Bookstein, A.; Klein, S. T. – Information Processing and Management, 1990
Describes the theoretical framework of a retrieval system that uses data structures called bitmaps to improve search algorithms for medium-sized systems. Information retrieval systems that contain the full text of the documents are discussed, and the use of inverted files such as concordances for small texts is explained. (24 references) (LRW)
Descriptors: Algorithms, Data Processing, Full Text Databases, Indexes
Beyond Topicality: A Two Stage View of Relevance and the Retrieval Process.
Peer reviewed Peer reviewed
Boyce, Bert – Information Processing and Management, 1982
An information retrieval system which aspires to retrieval of relevant documents should have second stage which will order topical set to provide maximum informativeness to requestor. A two-stage system concerned only with topicality can be iterated to generate a high recall set and discard imprecise documents without user input. (EJS)
Descriptors: Algorithms, Information Retrieval, Information Systems, Relevance (Information Retrieval)
Modelling of User Preferences and Needs in Boolean Retrieval Systems.
Peer reviewed Peer reviewed
Danilowicz, Czeslaw – Information Processing and Management, 1994
Discusses end-user searching in Boolean information retrieval systems considers the role of search intermediaries and proposes a model of user preferences that incorporates a user's profile. Highlights include document representation; information queries; document output ranking; calculating user profiles; and selecting documents for a local…
Descriptors: Algorithms, Comparative Analysis, Databases, Information Retrieval
The Psychology of Online Searching.
Peer reviewed Peer reviewed
Vigil, Peter J. – Journal of the American Society for Information Science, 1983
Proposes algorithmic method of searching and presents experimental data testing efficacy of using Boolean negation to eliminate redundancy and reduce cognitive strain of communication barrier at human-computer interface. Cognitive information processes, concept of Boolean NOT, and problem-solving behavior are explored. Twenty-five references are…
Descriptors: Algorithms, Cognitive Processes, Comparative Analysis, Information Retrieval
Query Formulation for Handling Negotiation in Information Retrieval Systems.
Peer reviewed Peer reviewed
Nakkouzi, Ziad S.; Eastman, Caroline M. – Journal of the American Society for Information Science, 1990
Discusses the problems caused for both users and systems by queries containing negation, and presents an algorithm for transforming Boolean queries with negated terms into queries without negation using a hierarchical thesaurus. A set of user requests submitted to an academic library are also examined to determine the pattern and frequency of use…
Descriptors: Academic Libraries, Algorithms, Behavior Patterns, Higher Education
Creating and Evaluating Entry Terms.
Peer reviewed Peer reviewed
Rada, Roy; And Others – Journal of Documentation, 1988
Describes the indexing concept of entry terms, and evaluates existing terms in the Medical Subject Headings by comparing them to the results of an automatic indexer. The results of experimental testing of a strategy for creating entry terms using the algorithms of the automatic indexer are presented. (31 references) (CLB)
Descriptors: Algorithms, Automatic Indexing, Computational Linguistics, Concept Mapping