THE NUCLEAR ZONE OF A LEIMKUHLER CURVE

Ronald Rousseau

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Abstract

A new definition of the nuclear zone of a Bradford or Leimkuhler curve is proposed. A p‐nucleus is defined within which the gradient of the curve is less than the proportion p of its maximum value. This definition is invariant of scale and so is widely applicable. Using Egghe's fitting method it is shown how one can find a p‐nucleus for data which may deviate from a strict Bradford‐Leimkuhler curve (e.g. having a Groos droop or being heavily truncated). A p‐nucleus is proposed for practical applications.

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References

1972Citation Analysis as a Tool in Journal Evaluation 1969Bradford's Law and the Bibliography of Science 1967THE BRADFORD DISTRIBUTION 1969Dispersion of Papers among Journals based on a Mathematical Analysis of Two Diverse Medical Literatures 1960The Bibliography of Operational Research 1985CONSEQUENCES OF LOTKA'S LAW FOR THE LAW OF BRADFORD 1978STUDIES ON PATENT CITATION NETWORKS 1986The dual of Bradford's law

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