Theory and practise of the g-index
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It is shown that the g-index inherits all the good properties of the h-index and better takes into account the citation scores of the top articles and yields a better distinction between and order of the scientists from the point of view of visibility.Abstract:
The g-index is introduced as an improvement of the h-index of Hirsch to measure the global citation performance of a set of articles. If this set is ranked in decreasing order of the number of citations that they received, the g-index is the (unique) largest number such that the top g articles received (together) at least g 2 citations. We prove the unique existence of g for any set of articles and we have that g ≥ h. The general Lotkaian theory of the g-index is presented and we show that g = (α-1 / α-2) α-1/α T 1/α where a> 2 is the Lotkaian exponent and where T denotes the total number of sources. We then present the g-index of the (still active) Price medallists for their complete careers up to 1972 and compare it with the h-index. It is shown that the g-index inherits all the good properties of the h-index and, in addition, better takes into account the citation scores of the top articles. This yields a better distinction between and order of the scientists from the point of view of visibility.read more
Citations
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Does the H index have predictive power
TL;DR: The findings indicate that the h index is better than other indicators considered (total citation count, citations per paper, and total paper count) in predicting future scientific achievement.
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Science Mapping: A Systematic Review of the Literature
TL;DR: A systematic review of the literature concerning major aspects of science mapping is presented to demonstrate the use of a science mapping approach to perform the review so that researchers may apply the procedure to the review of a scientific domain of their own interest.
Journal ArticleDOI
Universality of citation distributions: Toward an objective measure of scientific impact
TL;DR: It is shown that the probability that an article is cited c times has large variations between different disciplines, but all distributions are rescaled on a universal curve when the relative indicator cf = c/c0 is considered, where c0 is the average number of citations per article for the discipline.
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A review of the literature on citation impact indicators
TL;DR: In this paper, an in-depth review of the literature on citation impact indicators is provided, focusing on the selection of publications and citations to be included in the calculation of citation impact indicator.
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Quantifying long-term scientific impact.
TL;DR: A mechanistic model is derived for the citation dynamics of individual papers, allowing us to collapse the citation histories of papers from different journals and disciplines into a single curve, indicating that all papers tend to follow the same universal temporal pattern.
References
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Journal ArticleDOI
An index to quantify an individual's scientific research output
TL;DR: The index h, defined as the number of papers with citation number ≥h, is proposed as a useful index to characterize the scientific output of a researcher.
Journal ArticleDOI
A Hirsch-type index for journals
TL;DR: It is suggested that a h-type index - equal to h if you have published h papers, each of which has at least h citations - would be a useful supplement to journal impact factors.
Journal ArticleDOI
An introduction to informetrics
TL;DR: The scope and significance of the field of informetrics is defined and related to the earlier fields of bibliometrics and scientometrics; the phenomena studied by informetricians are identified.
Book
Introduction to Informetrics: Quantitative Methods in Library, Documentation and Information Science
Leo Egghe,Ronald Rousseau +1 more
TL;DR: This chapter discusses informetric models, the dual approach between sources and items giving rise to the definition of Information Production Processes, and some science policy applications.
An improvement of the h-index: the g-index
TL;DR: The H-index as mentioned in this paper measures the number of papers that received h or more citations and is a simple single number incorporating both publication (quantitiy) and citation (quality or visibility) scores and hence has an advantage over these single separate measures.