Results 251 to 260 of about 1,039 (265)

Two components of a causal explanation of Bradford's law

Journal of Information Science, 1996
One can suppose that Bradford's law is valid for all scientific fields. As an implication of this general validity and because of limitations of space, journals must differ in their subject structure, and every journal must have its own hierarchy of subjects, conforming to a Bradford or a similar distribution.
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An empirical examination of the existing models for Bradford's law

Information Processing & Management, 1990
Abstract All the existing models for Bradford's law were summarized and classified into different categories (e.g., rank-frequency cumulative, rank-frequency noncumulative, size-frequency, and other forms). The relationships between some models were established by mathematical deduction.
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A relationship between two forms of Bradford's law

Journal of the American Society for Information Science, 1978
AbstractIf g(x) is the number of journals having x references, we speak of a size‐frequency relationship. If f(r) is the number of references in a journal of rank r, we speak of a rank‐frequency relationship. In the former we can estimate the number of journals, given the number of references; in the latter we can estimate the number of references ...
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Zipf’s and Bradford’s laws and universal models

Automatic Documentation and Mathematical Linguistics, 2010
Zipf’s and Bradford’s laws are empirical laws that were derived by the processing and analysis of so-called rank distributions. In this paper, they are treated as special cases of generalized (universal) continuous distributions that can accurately describe a wide variety of statistical distributions, including rank.
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The periodical literature of demography and Bradford's law

International Journal of Information Management, 1986
This paper presents a statistical analysis of the journals and papers abstracted in Population Index, 1984. A Bradford distribution is fitted to the papers in all the journals regularly scanned by Population Index, as well as in the journals specifically designated as demography.
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Bradford's Law and Library Acquisitions

Nature, 1970
W, Goffman, T G, Morris
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Applications of the theory of Bradford's Law to the calculation of Leimkuhler's Law and to the completion of bibliographies

Journal of the American Society for Information Science, 1990
In a previous article (L. Egghe, JASIS 37(4); p. 246–255, 1986) we further developed the theory of Bradford's law by deriving a theoretical formula for the Bradford multiplier and for the number of items, produced by the most productive source in every Bradford group. In this article we apply these results to some classical bibliographies, for which we
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Bradford's Law

Nature, 1971
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The pitfalls of Bradford’s law

1988
Trata das diferenças entre o modelo teórico e os estudos empíricos da lei de Bradford e as conseqüentes distorções dos resultados destes últimos, quando a lei é mal utilizada.
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Bradford's Empirical Law

Journal of Library Development, 2015
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