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Showing 1 to 15 of 51 results Save | Export
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Onifade, Abdurrahman Bello – Education for Information, 2023
Misinformation is a global pandemic, fueled by the sophistication of the human intellect, algorithmic systems among other factors. Enhanced by the proliferation of algorithms optimized for engagement and reactions on social media, misinformation has ignited or hampered sociopolitical participation and movements and dissuaded citizens from being…
Descriptors: Misinformation, Accuracy, Information Dissemination, Online Systems
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Robertson, Alexander M.; Willett, Peter – Journal of Documentation, 1996
Describes a genetic algorithm (GA) that assigns weights to query terms in a ranked-output document retrieval system. Experiments showed the GA often found weights slightly superior to those produced by deterministic weighting (F4). Many times, however, the two methods gave the same results and sometimes the F4 results were superior, indicating…
Descriptors: Algorithms, Comparative Analysis, Information Retrieval, Online Searching
O'Neill, Edward T.; Aluri, Rao – 1980
The error-correcting algorithm described was constructed to examine subject headings in online catalog records for common errors such as omission, addition, substitution, and transposition errors, and to make needed changes. Essentially, the algorithm searches the authority file for a record whose primary key exactly matches the test key. If an…
Descriptors: Algorithms, Cataloging, Databases, Information Retrieval
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Rothstein, Jerome – 1977
Addressing the problem of protecting confidential information and data stored in computer databases from access by unauthorized parties, this paper details coding schemes which present such astronomical work factors to potential code breakers that security breaches are hopeless in any practical sense. Two procedures which can be used to encode for…
Descriptors: Algorithms, Codification, Computer Programs, Confidentiality
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Journal of the American Society for Information Science, 1980
Addresses the problem of systematic biases which affect the way that individuals construct and modify search queries on online retrieval systems, and suggests a searching algorithm that helps to avoid the effect of those biases. (FM)
Descriptors: Algorithms, Bias, Information Retrieval, Information Systems
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Craven, Timothy C. – Journal of the American Society for Information Science, 1980
Proposes that error rates in indexing using string index languages such as NEPHIS might be reduced at relatively low cost by having the indexer enter strings via a microcomputer system which could provide simple validation and feedback in the form of graphic displays of concept links. (Author/FM)
Descriptors: Algorithms, Automatic Indexing, Computer Graphics, Microcomputers
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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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Bell, C. L. M.; Jones, K. P. – Information Processing and Management, 1980
Explains, with supporting figures and flowcharts of programing logic, two search strategies introduced to the MORPHS System since 1976: one that employs the normal Boolean operators in strings without bracketing or in the form of marked steps, and one that treats a string of keywords as a compound word. (Author/JD)
Descriptors: Algorithms, Flow Charts, Information Retrieval, Minicomputers
Petry, Frederick E.; And Others – Proceedings of the ASIS Annual Meeting, 1993
Describes an approach that combines concepts from information retrieval, fuzzy set theory, and genetic programing to improve weighted Boolean query formulation via relevance feedback. Highlights include background on information retrieval systems; genetic algorithms; subproblem formulation; and preliminary results based on a testbed. (Contains 12…
Descriptors: Algorithms, Information Retrieval, Mathematical Formulas, Online Systems
Hickey, Thomas B. – 1981
Using macro and micro-structure analysis of large files of personal author names, this study developed retrieval techniques and algorithms to automatically correct and/or flag typographical errors in names, identify names in a database that are similar to a name entered by a user during a search, and measure similarities between names. It was…
Descriptors: Algorithms, Authors, Bibliographies, Computational Linguistics
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Egghe, L. – Information Processing and Management, 1988
Presents a mathematical theory that can be used to define concentration places of objects within unordered classes. The application to research on the evolution of journals and subject areas is illustrated, and an online method of calculating concentration evolution is described. (1 references) (CLB)
Descriptors: Algorithms, Bibliometrics, Classification, Databases
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Rousseau, Ronald – Information Processing and Management, 1985
Presents a modification function for weights of descriptors for documents in fuzzy retrieval systems which includes some desirable properties that are lacking in the model proposed by Choros and Danilowicz in their study on relative indexing. (MBR)
Descriptors: Algorithms, Indexing, Information Retrieval, Online Systems
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Davis, Charles H. – Special Libraries, 1972
A straightforward procedure for performing weighted-term searches can be programmed quickly and easily, and the same general algorithm can be used for either on-line or batch mode searching. The method can be used to do whole text searches as well as conventional searches for index terms or other descriptors. (5 references) (Author/NH)
Descriptors: Algorithms, Computer Programs, Information Retrieval, Online Systems
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Bell, Colin; Jones, Kevin P. – Journal of the American Society for Information Science, 1979
Surveys the current state of minicomputer-operated information systems capable of incorporating linguistic features, focusing on the Minicomputer Operated Retrieval (Partially Heuristic) System. Consideration is given to the automation of the indexing process and to available search strategies. (FM)
Descriptors: Algorithms, Automatic Indexing, Computational Linguistics, Computers
Krass, Iosif A. – 1998
In the process of item calibration for a computerized adaptive test (CAT), many well-established calibrating packages show weakness in the estimation of item parameters. This paper introduces an on-line calibration algorithm based on the convexity of likelihood functions. This package consists of: (1) an algorithm that estimates examinee ability…
Descriptors: Ability, Adaptive Testing, Algorithms, Computer Assisted Testing
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