Search Results
Abstract
A quick and easy method is presented to estimate the random fluctuations exhibited by citation measures. Applying this method allows for instance a better view on the ranking of journals (their so called 
pecking order
), when the ranks are based on the number of recieved citations or on the impact factor of the journal.
have been evaluated in terms of the citations they motivate, while journals are typically rated according to the impact factors reflecting the number of citations to their articles. Citations have been a major factor since the 1920s (Gross and Gross
Abstract
Recent research has shown that simple graphical representations of research performance can be obtained using two-dimensional maps based on impact (i) and citations (C). The product of impact and citations leads to an energy term (E). Indeed, using E as the third coordinate, three-dimensional landscape maps can be prepared. In this paper, instead of using the traditional impact factor and total citations received for journal evaluation, Article InfluenceTM and EigenfactorTM are used as substitutes. Article Influence becomes a measure of quality (i.e. a proxy for impact factor) and Eigenfactor is a proxy for size/quantity (like citations) and taken together, the product is an energy-like term. This can be used to measure the influence/prestige of a journal. It is also possible to propose a p-factor (where p = E 1/3) as an alternative measure of the prestige or prominence of a journal which plays the equivalent role of the h-index.
Abstract
This article reports findings from a study of the relationship between citation measures (impact factor and its quartile) among international composition of editorial board and foreign authorship in 17 Korean SCI journals for the three 5-year periods, 1995, 2000, and 2005. With few exceptions, the relationship between international editorial board composition and foreign authorship and citation measures was non-existent, at p > 0.05. However, the international members on editorial boards and foreign authorship of papers in Korean journals have increased greatly over the three 5-year periods, and there has been to a certain degree growth in the visibility and performance of Korean SCI journals in terms of impact factors, but not their quartiles.
Abstract
In recent studies the issue of the relatedness between journal impact factors and other measures of journal impact have been raised and discussed from both merely empirical and theoretical perspectives. Models of the underlying citation processes suggest distributions with two or more free parameters. Proceeding from the relation between the journals’ mean citation rate and uncitedness and the assumption of an underlying Generalised Waring Distribution (GWD) model, it is found that the journal impact factor alone does not sufficiently describe a journal’s citation impact, while a two-parameter solution appropriately reflects its main characteristics. For the analysis of highly cited publications an additional model derived from the same GWD is suggested. This approach results in robust, comprehensible and interpretable solutions that can readily be applied in evaluative bibliometrics.
Abstract
Brazilian scientific production has increased significantly over the last decade, and mental health has been a leading research field in the country, with a growing number of articles published in high quality international journals. This article analyses the scientific output of mental health research between 2004 and 2006 and estimates individual research performance based on four different strategies. A total of 106 mental health scientists were included in the analysis; together they published 1,209 articles indexed in Medline or ISI, with over 65% of the production in journals with impact factor ≥1. Median impact factor of publications was 2. Spearman correlation coefficient showed a large positive correlation between all four different measures used to estimate individual research output. Ten investigators were together responsible for almost 30% of the articles published in the period, whereas 65% of the sample contributed with less than 10 articles.
Abstract
We counted references in about 200 research papers in each of 16 journals in six physical sciences. They show that for average papers, the number of references is a linear function of the paper length. In fact, it is the same function for journals in different sciences. The fact that various physical sciences all give the same reference frequencies for papers of the same length and impact factor tells us that citation counts in those sciences can be intercompared. There is a dependence upon impact factor and a general relation is derived. In addition, the number of references increases by about 1.5% per year, probably due to the increase in the literature pertinent to any paper. The average paper lengths differ among the six sciences and three possible explanations for that difference are given.
Abstract
The standard of research at different departments of the Faculty of Natural Sciences of Kossuth Lajos University has been assessed by a scientometric evaluation of the publication activities of the departments. The essence of our approach is the consideration of the number and quality of the papers published. For a measure of this quality we regarded the impact factor of the journal, in which a paper was published. The rather different range of the impact factors of different fields were taken into account during the evaluation. As a whole, no considerable difference was found between the publication activity (impact per number of researchers) of the research institutes of the Hungarian Academy of Sciences and the corresponding departments of our Faculty, although, significant differences occur in certain fields. Based on this study, changes in the publication strategies of the different departments were recommended.
Abstract
On the basis of investigating author's opinion on citing motivations of chemistry papers aquasi-quantitative model for citing is suggested. The model selects professional and nonprofessional motivations of citing and introduces thecitation threshold concept which tries to characterize the effect of citing motivations quantitatively. Possible reasons for missing citations are also treated. Mean ages of real and of self-citations were calculated by subtracting the average of the publication years of cited papers from the publication year of the citing publication. The difference between the mean ages may characterize thesynchronity of the author's research in comparison with those working on similar topics. The paper introduces thecitation strategy indicator which relates impact factors of cited periodicals with the mean impact factor of periodicals in the corresponding research subfield.
Abstract
He andPao's method of identifying specific discipline journals is improved by adding the citing impact factor and self-citing rate. The proposed indicator strikes a balance by discounting the size of a discipline. And also this indicator paves the way to identify the constituent journals of a discipline. This method was tested in Physics, Applied Physics and Astronomy and Astrophysics. The findings lead to the rethinking about the inclusion of many journals in these fields.
