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Peer reviewed

Rousseau, Ronald; Van Hooydonk, Guido – Journal of the American Society for Information Science, 1996

Describes a direct linear relation between the number of articles in a journal and the journal's impact factor. Hypotheses are presented; theoretical considerations are discussed; and results are described that show exceptions for review journals and translation journals, as well as for journals in mathematics and chemistry. (Author/LRW)

Descriptors: Chemistry, Hypothesis Testing, Mathematical Formulas, Mathematics

Peer reviewed

Egghe, L. – Journal of the American Society for Information Science, 1990

Demonstrates that the multiplier that appears in the law of Bradford is not the average production of articles per author nor the average number of articles per journal, contradicting some earlier statements by Goffman and Warren and of Yablonsky. Other mathematical properties of Bradford's law are explored. (15 references) (Author/CLB)

Descriptors: Authors, Bibliometrics, Functions (Mathematics), Productivity

Peer reviewed

Basu, Aparna – Journal of the American Society for Information Science, 1992

Reviews the literature on Bradford's law (i.e., an empirical relationship describing the distribution of scholarly articles in relevant journals). A model for the distribution of articles, based on random partitioning, is presented; and a mathematical formulation for a law of scattering is derived. The relationship of the model to Bradford's law…

Descriptors: Bibliometrics, Mathematical Formulas, Mathematical Models, Research Reports

Peer reviewed

Everett, James E.; Pecotich, Antony – Journal of the American Society for Information Science, 1991

Discussion of journals and the nature of their interrelationships focuses on a loglinear model of citation frequency that allows an examination of the influence between journals of related disciplines. Multidimensional scaling (MDS) is described, and an example using the Social Sciences Citation Index (SSCI) and journals relating to marketing is…

Descriptors: Citation Analysis, Citations (References), Intellectual Disciplines, Marketing

Peer reviewed

Buckland, Michael – Journal of the American Society for Information Science, 1999

Discusses the American Society for Information Science (ASIS), founded in 1937 as the American Document Institute. Examines two traditions in information science--a document tradition concerned with signifying objects and their use, and a computational tradition of applying algorithmic, logical, mathematical, and mechanical techniques to…

Descriptors: Document Delivery, Higher Education, Information Dissemination, Information Industry

Peer reviewed

Drott, M. Carl; Griffith, Belver C. – Journal of the American Society for Information Science, 1978

Examines some questions arising in connection with the application and usefulness of Bradford's Law, which describes the dispersion of articles on a particular subject among journal titles. (Author)

Descriptors: Data Analysis, Data Collection, Information Retrieval, Literature

Peer reviewed

Egghe, Leo; Rousseau, Ronald – Journal of the American Society for Information Science, 2000

Examines the notions of aging, obsolescence, impact, growth, utilization, and related concepts in information science. Illustrates the influence of growth on aging, how aging rates can be corrected for growth, and the relation with impact measures. Presents mathematical results, practical calculations, and examples of these concepts. Gives a brief…

Descriptors: Age, Information Science, Information Sources, Information Utilization

Peer reviewed

McCarn, Davis B.; Lewis, Craig M. – Journal of the American Society for Information Science, 1990

Reviews selected research on the performance of bibliographic and full-text databases. A mathematical model for clarification of the relationship between user behavior and the performance measures of recall and precision is presented. (five references) (MES)

Descriptors: Bibliographic Databases, Full Text Databases, Information Retrieval, Mathematical Models

Peer reviewed

Egghe, Leo; Rousseau, Ronald – Journal of the American Society for Information Science, 2000

Discusses the influence of publication delays on the aging of scientific literature and explains how the undisturbed aging function and the publication delay combine to give the observed aging function through a mathematical operation called convolution. Shows the convolution of various distributions and considers a paradox between theory and real…

Descriptors: Mathematical Formulas, Paradox, Publishing Industry, Scientific and Technical Information

Peer reviewed

Egghe, L. – Journal of the American Society for Information Science, 1987

Pratt's measure C on the class concentration of bibliometric distributions is calculated and interpreted for the laws of Zipf, Mandelbrot, and Lotka and geometric distribution, and comparisons are made of the results. An explicit mathematical formula which unifies disparate theories is derived and tested. (Author/CLB)

Descriptors: Bibliometrics, Classification, Comparative Analysis, Functions (Mathematics)

Peer reviewed

Praunlich, Peter; Kroll, Michael – Journal of the American Society for Information Science, 1978

Recent mathematical descriptions of Bradford's distribution, and a new formulation that provides a more accurate estimation of the total number of papers and sources on a given scientific subject are presented. (Author/MBR)

Descriptors: Bibliographies, Content Analysis, Graphs, Mathematical Models

Peer reviewed

Triolo, Victor A; Bao, Dachun – Journal of the American Society for Information Science, 1993

Proposes a model for technical journal deselection based on the Bradford law of distribution. The model's operational prescriptives, characteristics of the Bradford distribution in the field of pediatrics, and relevance to collection management are discussed. (42 references) (KRN)

Descriptors: Bibliometrics, Information Utilization, Library Collection Development, Mathematical Formulas

Peer reviewed

Kent, A.; And Others – Journal of the American Society for Information Science, 1990

Describes a new signature file method, called the multiorganizational scheme, for accessing information from large databases containing both formatted and free-text data. Implementation issues are discussed, and computational results based on a mathematical model are presented, as well as results using a library database. (43 references) (MES)

Descriptors: Bibliographic Databases, Full Text Databases, Information Retrieval, Library Research

Peer reviewed

Cooper, Michael D. – Journal of the American Society for Information Science, 1991

Develops mathematical models to characterize the probability of continued use of an integrated office automation system and tests these models on longitudinal data collected from 210 individuals using the IBM Professional Office System (PROFS) at the University of California at Berkeley. Analyses using survival functions and proportional hazard…

Descriptors: Adoption (Ideas), Information Systems, Longitudinal Studies, Mathematical Models

Peer reviewed

Gordon, Michael; Kochen, Manfred – Journal of the American Society for Information Science, 1989

Describes the recall precision trade-off in information retrieval as the deceleration in the proportion of relevant documents retrieved over time. Several mathematical functions sharing this property are examined and it is concluded that the equation that best models recall as a function of time is the logarithm of a quadratic equation. (21…

Descriptors: Equations (Mathematics), Functions (Mathematics), Logarithms, Mathematical Models