75,575 research outputs found
References made and citations received by scientific articles.
This article studies massive evidence about references made and citations received after a 5-year citation window by 3.7 million articles published in 1998 to 2002 in 22 scientific fields. We find that the distributions of references made and citations received share a number of basic features across sciences. Reference distributions are rather skewed to the right while citation distributions are even more highly skewed:The mean is about 20 percentage points to the right of the median, and articles with a remarkable or an outstanding number of citations represent about 9% of the total. Moreover, the existence of a power law representing the upper tail of citation distributions cannot be rejected in 17 fields whose articles represent 74.7% of the total. Contrary to the evidence in other contexts, the value of the scale parameter is above 3.5 in 13 of the 17 cases. Finally, power laws are typically small, but capture a considerable proportion of the total citations received
References made and citations received by scientific articles
This paper studies massive evidence about references made and citations received after a five-year citation window by 3.7 million articles published in 1998-2002 in 22 scientific fields. We find that the distributions of references made and citations received share a number of basic features across sciences. Reference distributions are rather skewed to the right, while citation distributions are even more highly skewed: the mean is about 20 percentage points to the right of the median, and articles with a remarkable or outstanding number of citations represent about 9% of the total. Moreover, the existence of a power law representing the upper tail of citation distributions cannot be rejected in 17 fields whose articles represent 74.7% of the total. Contrary to the evidence in other contexts, the value of the scale parameter is above 3.5 in 13 of the 17 cases. Finally, power laws are typically small but capture a considerable proportion of the total citations received.
References made and citations received by scientific articles
This paper studies massive evidence about references made and citations received after a five-year
citation window by 3.7 million articles published in 1998-2002 in 22 scientific fields. We find that
the distributions of references made and citations received share a number of basic features across
sciences. Reference distributions are rather skewed to the right, while citation distributions are
even more highly skewed: the mean is about 20 percentage points to the right of the median, and
articles with a remarkable or outstanding number of citations represent about 9% of the total.
Moreover, the existence of a power law representing the upper tail of citation distributions cannot
be rejected in 17 fields whose articles represent 74.7% of the total. Contrary to the evidence in
other contexts, the value of the scale parameter is above 3.5 in 13 of the 17 cases. Finally, power
laws are typically small but capture a considerable proportion of the total citations receivedEuropean Community's Seventh Framework ProgramThe authors acknowledge financial support from the Spanish MEC, Grants SEJ2007-67436,
SEJ2007-63098 and SEJ2006-05710. The database of Thomson Scientific (formerly Thomson-ISI;
Institute for Scientific Information) has been acquired with funds from Santander Universities
Global Division of Banco Santander. This paper is part of the SCIFI-GLOW Collaborative Project
supported by the European Commission’s Seventh Research Framework Programme, Contract no.
SSH7-CT-2008-217436
References made and citations received by scientific articles
This article studies massive evidence about references
made and citations received after a 5-year citation window
by 3.7 million articles published in 1998 to 2002 in
22 scientific fields. We find that the distributions of references
made and citations received share a number of
basic features across sciences. Reference distributions
are rather skewed to the right while citation distributions
are even more highly skewed:The mean is about 20
percentage points to the right of the median, and articles
with a remarkable or an outstanding number of citations
represent about 9% of the total. Moreover, the existence
of a power law representing the upper tail of citation distributions
cannot be rejected in 17 fields whose articles
represent 74.7% of the total. Contrary to the evidence in
other contexts, the value of the scale parameter is above
3.5 in 13 of the 17 cases. Finally, power laws are typically
small, but capture a considerable proportion of the total
citations receivedEuropean Community's Seventh Framework ProgramPublicad
Further clarifications about the success-index
The aim of this brief communication is to reply to a letter by Kosmulski (Journal of Informetrics 6(3):368-369, 2012), which criticizes a recent indicator called "success-index". The most interesting features of this indicator, presented in Franceschini et al. (Scientometrics, in press), are: (i) allowing the selection of an "elite" subset from a set of publications and (ii) implementing the field-normalization at the level of an individual publication. We show that the Kosmulski's criticism is unfair and inappropriate, as it is the result of a misinterpretation of the indicato
The success-index: an alternative approach to the h-index for evaluating an individual's research output
Among the most recent bibliometric indicators for normalizing the differences among fields of science in terms of citation behaviour, Kosmulski (J Informetr 5(3):481-485, 2011) proposed the NSP (number of successful paper) index. According to the authors, NSP deserves much attention for its great simplicity and immediate meaning— equivalent to those of the h-index—while it has the disadvantage of being prone to manipulation and not very efficient in terms of statistical significance. In the first part of the paper, we introduce the success-index, aimed at reducing the NSP-index's limitations, although requiring more computing effort. Next, we present a detailed analysis of the success-index from the point of view of its operational properties and a comparison with the h-index's ones. Particularly interesting is the examination of the success-index scale of measurement, which is much richer than the h-index's. This makes success-index much more versatile for different types of analysis—e.g., (cross-field) comparisons of the scientific output of (1) individual researchers, (2) researchers with different seniority, (3) research institutions of different size, (4) scientific journals, etc
On the relationship between interdisciplinarity and scientific impact
This paper analyzes the effect of interdisciplinarity on the scientific
impact of individual papers. Using all the papers published in Web of Science
in 2000, we define the degree of interdisciplinarity of a given paper as the
percentage of its cited references made to journals of other disciplines. We
show that, although for all disciplines combined there is no clear correlation
between the level of interdisciplinarity of papers and their citation rates,
there are nonetheless some disciplines in which a higher level of
interdisciplinarity is related to a higher citation rates. For other
disciplines, citations decline as interdisciplinarity grows. One characteristic
is visible in all disciplines: highly disciplinary and highly interdisciplinary
papers have a low scientific impact. This suggests that there might be an
optimum of interdisciplinarity beyond which the research is too dispersed to
find its niche and under which it is too mainstream to have high impact.
Finally, the relationship between interdisciplinarity and scientific impact is
highly determined by the citation characteristics of the disciplines involved:
papers citing citation intensive disciplines are more likely to be cited by
those disciplines and, hence, obtain higher citation scores than papers citing
non citation intensive disciplines.Comment: 10 pages, 3 figures, 1 table. Forthcoming in JASIS
Arts and Humanities Literature: Bibliometric Characteristics of Contributions by Turkish Authors
Scholarly communication in arts and humanities differs from that in the sciences. Arts and humanities scholars rely primarily on monographs as amedium of publication whereas scientists consider articles that appear in scholarly journals as the single most important publication outlet. The number of journal citation studies in arts and humanities is therefore limited. In this article, we investigate the bibliometric characteristics of 507 arts and humanities journal articles written by authors affiliated with Turkish institutions and indexed in the Arts & Humanities Citation Index (A&HCI) between the years 1975–2003. Journal articles constituted more than 60% of all publications. One third of all contributions were published during the last 4 years (1999–2003) and appeared in 16 different journals. An overwhelming majority of contributions (91%) were written in English, and 83% of them had single authorship. Researchers based at Turkish universities produced 90% of all publications. Two thirds of references in publications were to monographs. The median age of all references was 12 years. Eighty percent of publications authored by Turkish arts and humanities scholars were not cited at all while the remaining 20% (or 99 publications) were cited 304 times (anaverage of three citations per publication). Self-citation ratio was 31%. Two thirds of the cited publications were cited for the first time within 2 years of their publications
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