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Catalogue of the Trustees, Professors, and Students of the Jefferson Medical College of Philadelphia: Session of 1867-68 [PDF]
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Scientometrics, 1984
Two models of the mechanism responsible for the distribution of scientific papers in an area over periodicals are given. Empirical distributions following Bradford's law are shown to agree quite closely with a lognormal distribution. This distribution arises, in one model, by taking the probability of a paper being published in a particular journal as ...
null Karmeshu, N. C. Lind, V. Cano
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Two models of the mechanism responsible for the distribution of scientific papers in an area over periodicals are given. Empirical distributions following Bradford's law are shown to agree quite closely with a lognormal distribution. This distribution arises, in one model, by taking the probability of a paper being published in a particular journal as ...
null Karmeshu, N. C. Lind, V. Cano
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A relationship between Lotka's Law, Bradford's Law, and Zipf's Law
Journal of the American Society for Information Science, 1986A common functional relationship among Lotka's law, Bradford's law, and Zipf's law is derived. The proof takes explicit account of the sequences of observed values of the variables by means of an index. This approach results in a more realistic and precise formulation of each law. © 1986 John Wiley & Sons, Inc.
Ye-Sho Chen, Ferdinand F. Leimkuhler
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Dynamic behavior of Bradford's law
Journal of the American Society for Information Science, 1995This paper examines two problems associated with Bradford's law: (1) Since empirical data deviate from the law in many applications, what are the significant factors influencing the Bradford graphs? (2) What will be the evolution over time of the Bradford graphs?
Ye-Sho Chen +2 more
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Bradford's law: An index approach
Scientometrics, 1987A rigorous analysis of Bradford's law is made using an index for the observed values of the variables. Three important properties relating size and frequency are identified. Using this approach, the shape of Bradford-type curves can be described in terms of three distinct regions and two shape parameters.
Ye-Sho Chen, F. F. Leimkuhler
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ON THE UNITY OF BRADFORD'S LAW
Journal of Documentation, 1984It is shown that there is no ambiguity in Bradford's theory of distribution. Starting with the two basic postulates laid down by Bradford, a mathematical expression is derived such that its curve agrees with the experimentally plotted data.
M.J.F. MAIA, null MAIA
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THE AMBIGUITY OF BRADFORD'S LAW
Journal of Documentation, 1972Recent discussion of Bradford's law of scatter has been founded on two formulations that are not mathematically equivalent. A method of comparing the two formulations against empirical data is developed, and the results using four sets of existing data are discussed. The results show that one particular formulation is more consistent with the practical
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Journal of Documentation, 1948
DURING the course of an analysis of some 1,600 periodical references, borrowed by the library of Butterwick Research Laboratories from outside libraries, the results of the analysis were compared with studies on the scatter of articles in periodicals carried out at the Science Library.
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DURING the course of an analysis of some 1,600 periodical references, borrowed by the library of Butterwick Research Laboratories from outside libraries, the results of the analysis were compared with studies on the scatter of articles in periodicals carried out at the Science Library.
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