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author = "EGGHE, Leo"
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Found 221 documents, displaying page 1 of 23

Performance and its relation with productivity in Lotkaian systems

Author(s) : EGGHE, Leo
Description : In general information production processes (IPPs), we define productivity as the total number of sources but we present a choice of seven possible definitions of performance: the mean or median number of items per source, the fraction of sources with a certain minimum number of items, the h-, g-, R...
Repository : Document Server@UHasselt
Language(s) : English

Influence of adding or deleting items and sources on the h-index

Author(s) : EGGHE, Leo
Description : Adding or deleting items such as self-citations has an influence on the h-index of an author. This influence will be proved mathematically in this article. We hereby prove the experimental finding in E. Gianoli and M.A. Molina-Montenegro ([2009]) that the influence of adding or deleting self-citatio...
Repository : Document Server@UHasselt
Language(s) : English

Letter to the editor: On Randić’s H-sequence

Author(s) : EGGHE, Leo
Description :
Repository : Document Server@UHasselt
Language(s) : English

Mathematical results on the H-index and H-sequence of Randić

Author(s) : EGGHE, Leo
Description : Mathematical formulae for Randic's H-sequence and H-index in a Lotkaian framework are presented. We also present a variant of Randic's H-index. We prove that the following assertions are equivalent: given two persons with the same Hirsch h-index: the Randic H-index H-1 of the first person is larger ...
Repository : Document Server@UHasselt
Language(s) : English

On the relation between the Association Strength and other similarity measures

Author(s) : EGGHE, Leo
Description : A graph in van Eck and Waltman [JASIST, 60(8), 2009, p. 1644], representing the relation between the association strength and the cosine, is partially explained as a sheaf of parabolas, each parabola being the functional relation between these similarity measures on the trajectories (X) over right a...
Repository : Document Server@UHasselt
Language(s) : English

The distribution of the uncitedness factor and its functional relation with the impact factor

Author(s) : EGGHE, Leo
Description : The uncitedness factor of a journal is its fraction of uncited articles. Given a set of journals (e.g. in a field) we can determine the rank-order distribution of these uncitedness factors. Hereby we use the Central Limit Theorem which is valid for uncitedness factors since it are fractions, hence a...
Repository : Document Server@UHasselt
Language(s) : English

Expansion of the field of informetrics: Origins and consequences

Author(s) : EGGHE, Leo
Description :
Repository : Document Server@UHasselt
Language(s) : English

The distribution of the uncitedness factor and its functional relation with the impact factor

Author(s) : EGGHE, Leo
Description : The uncitedness factor of a journal is its fraction of uncited articles. Given a set of journals (e.g. in a field) we can determine the rank-order distribution of these uncitedness factors. Hereby we use the Central Limit Theorem which is valid for uncitedness factors since it are fractions, hence a...
Repository : Document Server@UHasselt
Language(s) : English

The Hirsch-index and related impact measures

Author(s) : EGGHE, Leo
Description : The Hirsch-index (or h-index), introduced in 2005 by Jorge Hirsch, is one of the most popular indicators in information science and in informetrics. Hundreds of articles have been written on the h-index or related h-type indices. To quote Ball (2007): ”… the h-index does seem to be able to identify ...
Repository : Document Server@UHasselt
Language(s) : English

Kwantitatieve managementtechnieken in bibliotheken en documentatiecentra - Deel 1

Author(s) : EGGHE, Leo
Description :
Repository : Document Server@UHasselt
Language(s) : Dutch
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Found 221 documents, displaying page 1 of 23