Results 211 to 220 of about 3,858 (248)
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Journal of the American Society for Information Science, 1986
In this article, we examine the classical law of Bradford. This law yields groups with an equal number of articles, but where the number of journals increases geometrically. Within each group, and starting with the last ones (the least productive journals) we examine the maximal productivity of the journals.
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In this article, we examine the classical law of Bradford. This law yields groups with an equal number of articles, but where the number of journals increases geometrically. Within each group, and starting with the last ones (the least productive journals) we examine the maximal productivity of the journals.
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Journal of Documentation, 1977
The Bradford law is explored theoretically by means of a very mixed Poisson model which, it is claimed, elucidates the uncertainties surrounding the law and its applications. It is argued that Bradford succeeded in formulating an empirical regularity which has pure and hybrid forms but that all the variants can be subsumed under a simple logarithmic ...
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The Bradford law is explored theoretically by means of a very mixed Poisson model which, it is claimed, elucidates the uncertainties surrounding the law and its applications. It is argued that Bradford succeeded in formulating an empirical regularity which has pure and hybrid forms but that all the variants can be subsumed under a simple logarithmic ...
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Evaluation of the models for Bradford's law
Scientometrics, 1998A goodness of fit test is conducted for two models for Bradford's law given byEgghe andSmolkov. The conclusion is that Smolkov's model is of comparatively higher accuracy. Finally the paper points out the necessity of carrying out statistical tests for comparisons more frequently for the new models of Bradford's law in the development of the law in ...
Wang Chongde, Wang Zhe
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Bradford’s law and its application
International Library Review, 1979(1979). Bradford’s law and its application. International Library Review: Vol. 11, No. 1, pp. 151-158.
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Bradford's Law and its relevance to researchers
Education for Information, 2011Bradford's Law has been the subject of much discussion and analysis in library and information science since its formulation in the 1930s and remains frequently debated to this day. It has been applied to various practices within the discipline, especially with regard to collection development, but its relevance to researchers and the potential it ...
Shenton, Andrew K., Hay-Gibson, Naomi V.
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Bradford's Law and the Bibliography of Science
Nature, 1969The rationalization of scientific library systems might be greatly facilitated by the application of Bradford's law, formulated more than twenty years ago.
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Hierarchical distributions and Bradford's Law
Journal of the American Society for Information Science, 1992A probabilistic model of random fragmentation of the unit line provides the formal underpinning for deriving a distribution of the articles published in any field, over journals ranked in decreasing order of productivity. No assumptions need to be made about the causal mechanism that brings about such a distribution.
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AN EXACT FORMULATION OF BRADFORD'S LAW
Journal of Documentation, 1980An exact, discrete formulation of Bradford's law describing the distribution of articles in journals is derived by showing that Bradford's law is a special case of the Zipf‐Mandelbrot ‘rank frequency’ law. A relatively simple method is presented for fitting the model to empirical data and estimating the number of journals and articles in a subject ...
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The yield formula and bradford's law
Journal of the American Society for Information Science, 1976AbstractThe relation between a number of n top producing journals and their cumulative yield R(n)—articles, loans—is expressed by a yield graph (Figs. 1 and 3). Graphically, by linearization of the yield graph (Figs. 2 and 4), the following yield formula is deduced (Fig. 5): \documentclass{article}\pagestyle{empty}\begin{document}$ R\left(n \right) = h\
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Towards a multi-disciplinary Bradford law
Scientometrics, 1994Bradford's law, perhaps the most well known of the Informetric regularities, analyzes the scattering of articles in a single discipline over journals. Yet journals are multi-disciplinary entities. This paper discusses the implications for Bradford's law of the multi-disciplinary character of journals, and defines a simple model that indicates the ...
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