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Allocation of research funding, as well as promotion and tenure decisions, are increasingly made using indicators and impact factors drawn from citations to published work. A debate among scientometricians about proper normalization of…

Digital Libraries · Computer Science 2012-05-08 Caroline S. Wagner , Loet Leydesdorff

In bibliometrics, the association of "impact" with central-tendency statistics is mistaken. Impacts add up, and citation curves should therefore be integrated instead of averaged. For example, the journals MIS Quarterly and JASIST differ by…

Digital Libraries · Computer Science 2011-06-14 Loet Leydesdorff , Lutz Bornmann

We combine the Integrated Impact Indicator (I3) and the h-index into the I3-type framework and introduce the publication vector X = (X1, X2, X3) and the citation vector Y = (Y1, Y2, Y3) , the publication score I3X=X1+X2+X3 and the citation…

Digital Libraries · Computer Science 2017-07-07 Helen F. Xue , Loet Leydesdorff , Fred Y. Ye

Recently, the integrated impact indicator (I3) indicator was introduced where citations are weighted in accordance with the percentile rank class of each publication in a set of publications. I3 can also be used as a field-normalized…

Digital Libraries · Computer Science 2019-02-19 Lutz Bornmann , Alexander Tekles , Loet Leydesdorff

The two most used citation impact indicators in the assessment of scientific journals are, nowadays, the impact factor and the h-index. However, both indicators are not field normalized (vary heavily depending on the scientific category)…

Digital Libraries · Computer Science 2015-10-14 Sara M. Gonzalez-Betancor , Pablo Dorta-Gonzalez

Citation metrics are analytic measures used to evaluate the usage, impact and dissemination of scientific research. Traditionally, citation metrics have been independently measured at each level of the publication pyramid, namely at the…

Digital Libraries · Computer Science 2017-07-04 Jacques Balayla

Journal Impact Factors (IFs) can be considered historically as the first attempt to normalize citation distributions by using averages over two years. However, it has been recognized that citation distributions vary among fields of science…

Digital Libraries · Computer Science 2012-02-07 Loet Leydesdorff

Citation distributions are so skewed that using the mean or any other central tendency measure is ill-advised. Unlike G. Prathap's scalar measures (Energy, Exergy, and Entropy or EEE), the Integrated Impact Indicator (I3) is based on…

Digital Libraries · Computer Science 2011-08-31 Loet Leydesdorff , Tobias Opthof

We tested Rousseau's (in press) recent proposal to define percentile classes in the case of the Integrated Impact Indicator (I3) so that the largest number in a set always belongs to the highest (100th) percentile rank class. In the case a…

Computers and Society · Computer Science 2011-12-30 Loet Leydesdorff , Lutz Bornmann

One is inclined to conceptualize impact in terms of citations per publication, and thus as an average. However, citation distributions are skewed, and the average has the disadvantage that the number of publications is used in the…

Digital Libraries · Computer Science 2012-04-10 Loet Leydesdorff

Nowadays impact factor is the significant indicator for journal evaluation. In impact factor calculation is used number of all citations to journal, regardless of the prestige of cited journals, however, scientific units (paper, researcher,…

Digital Libraries · Computer Science 2015-06-10 Rasim Alguliyev , Ramiz Aliguliyev , Nigar Ismayilova

The Journal Impact Factor (JIF) is, by far, the most discussed bibliometric indicator. Since its introduction over 40 years ago, it has had enormous effects on the scientific ecosystem: transforming the publishing industry, shaping hiring…

Digital Libraries · Computer Science 2018-03-06 Vincent Lariviere , Cassidy R. Sugimoto

In this study, we systematically elucidate the background and functionality of the Scilit database and evaluate the feasibility and advantages of the comprehensive impact metrics I3 and I3/N, introduced within the Scilit framework. Using a…

Digital Libraries · Computer Science 2026-01-06 Haochen Dong , Sun Qiao , Yanping Mu , Lu Liao , Diogo Rodrigues , Frank Sauerburger , Yi Bu , Robin Haunschild

Journal impact factor (IF) as a gauge of influence and impact of a particular journal comparing with other journals in the same area of research, reports the mean number of citations to the published articles in particular journal.…

Analyzing the relationships among the parameters for quantifying the quality of research published in journals is a challenging task. In this paper, we analyze the relationships between impact factor, h-index, and g-index of a journal. To…

Digital Libraries · Computer Science 2015-03-17 Ash Mohammad Abbas

Ranking scientific authors is an important but challenging task, mostly due to the dynamic nature of the evolving scientific publications. The basic indicators of an author's productivity and impact are still the number of publications and…

Digital Libraries · Computer Science 2016-10-25 Dinesh Pradhan , Partha Sarathi Paul , Umesh Maheswari , Subrata Nandi , Tanmoy Chakraborty

The launching of Scopus and Google Scholar, and methodological developments in Social Network Analysis have made many more indicators for evaluating journals available than the traditional Impact Factor, Cited Half-life, and Immediacy Index…

Physics and Society · Physics 2009-09-25 Loet Leydesdorff

The h-index provides us with nine natural classes which can be written as a matrix of three vectors. The three vectors are: X=(X1, X2, X3) indicate publication distribution in the h-core, the h-tail, and the uncited ones, respectively;…

Digital Libraries · Computer Science 2013-07-16 Fred Y. Ye , Loet Leydesdorff

In order to advance academic research, it is important to assess and evaluate the academic influence of researchers and the findings they produce. Citation metrics are universally used methods to evaluate researchers. Amongst the several…

Digital Libraries · Computer Science 2023-05-18 Aashay Singhal , Kamalakar Karlapalem

The Journal Impact Factor (JIF) is linearly sensitive to self-citations because each self-citation adds to the numerator, whereas the denominator is not affected. Pinski & Narin (1976) derived the Influence Weight (IW) as an alternative to…

Digital Libraries · Computer Science 2019-08-16 Gangan Prathap , Loet Leydesdorff
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