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Knowledge linkage structures in communication studies using citation analysis among communication journals  [PDF]
Han Park,Loet Leydesdorff
Computer Science , 2009,
Abstract: This research analyzes a "who cites whom" matrix in terms of aggregated, journal-journal citations to determine the location of communication studies on the academic spectrum. Using the Journal of Communication as the seed journal, the 2006 data in the Journal Citation Reports are used to map communication studies. The results show that social and experimental psychology journals are the most frequently used sources of information in this field. In addition, several journals devoted to the use and effects of media and advertising are weakly integrated into the larger communication research community, whereas communication studies are dominated by American journals.
Psychology Publication Issues in the Czech Republic  [PDF]
Psychology Science Quarterly , 2009,
Abstract: The aim of this paper is to present the current situation and the view of psychology publication policy in Czech Republic. The presentation provided a platform for discussion. It summarized sixth-century progress in the development of scientific language. The current publication situation in Psychology in the Czech Republic was described. The present article reports on the journals: Czechoslovak Psychology (Prague) in comparison with the journal Studia psychologica (Bratislava), about their impact factors and citation indexes; Psychology in Economical Practice; E-Psychologie; Psychology Today; two proceedings: Annales Psychologici (Brno) and Varia psychologica (Olomouc); News of the Czech-Moravian Psychological Society. In the Czech Republic, there seems to be a wish for the enlargement of the publication policy tailored to European perspectives; this is the challenge.
Ranking journals: Could Google Scholar Metrics be an alternative to Journal Citation Reports and Scimago Journal Rank?  [PDF]
Emilio Delgado Lopez-Cozar,Alvaro Cabezas-Clavijo
Computer Science , 2013, DOI: 10.1087/20130206
Abstract: The launch of Google Scholar Metrics as a tool for assessing scientific journals may be serious competition for Thomson Reuters Journal Citation Reports, and for Scopus powered Scimago Journal Rank. A review of these bibliometric journal evaluation products is performed. We compare their main characteristics from different approaches: coverage, indexing policies, search and visualization, bibliometric indicators, results analysis options, economic cost and differences in their ranking of journals. Despite its shortcomings, Google Scholar Metrics is a helpful tool for authors and editors in identifying core journals. As an increasingly useful tool for ranking scientific journals, it may also challenge established journals products
Clusters and Maps of Science Journals Based on Bi-connected Graphs in the Journal Citation Reports  [PDF]
Loet Leydesdorff
Computer Science , 2009,
Abstract: The aggregated journal-journal citation matrix derived from the Journal Citation Reports 2001 can be decomposed into a unique subject classification by using the graph-analytical algorithm of bi-connected components. This technique was recently incorporated in software tools for social network analysis. The matrix can be assessed in terms of its decomposability using articulation points which indicate overlap between the components. The articulation points of this set did not exhibit a next-order network of 'general science' journals. However, the clusters differ in size and in terms of the internal density of their relations. A full classification of the journals is provided in an Appendix. The clusters can also be extracted and mapped for the visualization.
Visualization of the Citation Impact Environments of Scientific Journals: An online mapping exercise  [PDF]
Loet Leydesdorff
Computer Science , 2009,
Abstract: Aggregated journal-journal citation networks based on the Journal Citation Reports 2004 of the Science Citation Index (5968 journals) and the Social Science Citation Index (1712 journals) are made accessible from the perspective of any of these journals. The user is thus able to analyze the citation environment in terms of links and graphs. Furthermore, the local impact of a journal is defined as its share of the total citations in the specific journal's citation environments; the vertical size of the nodes is varied proportionally to this citation impact. The horizontal size of each node can be used to provide the same information after correction for within-journal (self)-citations. In the "citing" environment, the equivalents of this measure can be considered as a citation activity index which maps how the relevant journal environment is perceived by the collective of authors of a given journal. As a policy application, the mechanism of interdisciplinary developments among the sciences is elaborated for the case of nanotechnology journals.
Indicators of Structural Change in the Dynamics of Science: Entropy Statistics of the SCI Journal Citation Reports  [PDF]
Loet Leydesdorff
Computer Science , 2009,
Abstract: Can change in citation patterns among journals be used as an indicator of structural change in the organization of the sciences? Aggregated journal-journal citations for 1999 are compared with similar data in the Journal Citation Reports 1998 of the Science Citation Index. In addition to indicating local change, probabilistic entropy measures enable us to analyze changes in distributions at different levels of aggregation. The results of various statistics are discussed and compared by elaborating the journal-journal mappings. The relevance of this indicator for science and technology policies is further specified.
Comparison of Journal Self-Citation Rates between Some Chinese and Non-Chinese International Journals  [PDF]
Zu-Guo Yang, Feng Gao, Chun-Ting Zhang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0049001
Abstract: Background The past 3 decades have witnessed a boost in science development in China; in parallel, more and more Chinese scientific journals are indexed by the Journal Citation Reports issued by Thomson Reuters (SCI). Evaluation of the performance of these Chinese SCI journals is necessary and helpful to improve their quality. This study aimed to evaluate these journals by calculating various journal self-citation rates, which are important parameters influencing a journal impact factor. Methodology/Principal Findings We defined three journal self-citation rates, and studied these rates for 99 Chinese scientific journals, almost exhausting all Chinese SCI journals currently available. Likewise, we selected 99 non-Chinese international (abbreviated as ‘world’) journals, with each being in the same JCR subject category and having similar impact factors as their Chinese counterparts. Generally, Chinese journals tended to be higher in all the three self-citation rates than world journal counterparts. Particularly, a few Chinese scientific journals had much higher self-citation rates. Conclusions/Significance Our results show that generally Chinese scientific journals have higher self-citation rates than those of world journals. Consequently, Chinese scientific journals tend to have lower visibility and are more isolated in the relevant fields. Considering the fact that sciences are rapidly developing in China and so are Chinese scientific journals, we expect that the differences of journal self-citation rates between Chinese and world scientific journals will gradually disappear in the future. Some suggestions to solve the problems are presented.
Análisis comparativo de las publicaciones sobre drogodependencias en las revistas de psicología clínica y psiquiatría iberoamericanas indexadas en el Journal Citation Reports
Quevedo-Blasco, Raúl;Díaz-Piedra, Carolina;Guglielmi, Ottavia;
Salud mental , 2010,
Abstract: introduction drug consumption has become a social problem requiring political, social, and educational intervention in its prevention and treatment. in latin america, the drug problem is highly related to the violence and the social exclusion of the metropolis. forty percent of the 15-year-olds already smoke. on average, each person in the general population consumes approximately 6 kg of alcohol per year: the highest value in the less developed world. meanwhile, in spain, over a million people experience significant difficulties related to drug consumption (not including the effects of tobacco) in relation to health, family, labor, and social issues. in 2006, one out of 10 young people between the ages 14 and 18 consumed alcohol in an abusive manner more than four or five days per month. drug consumption is a very complex, multi-factor issue with multiple economic, social, cultural, and personal implications. the most visible negative effects are observed in health issues and personal relationships. in the public scope, the most negative effects are related to important direct and indirect economic expenses, including the treatment and prevention of drug dependency, the reduction in labor productivity, the increase in charity, the fight against the delinquency, and the trafficking of drugs. the present study examines whether or not there is a correspondence between the social, public health, and political importance of drug dependency and the basic and applied research in spanish and latin american scientific literature. there are two objectives for this investigation: first, to quantify the scientific investigation of drug dependency in the last four years in latin american clinical psychology and psychiatry journals, included in the journal citation reports (jcr). the second objective is to state the differences between the journals in relation to the applied methodology, the type of sample used, and the principal topic of discourse. method the units of analysis
A Citation Data Analysis of JCR-Covered Journals in Geosciences  [cached]
  Shengli Ren、Ronald Rousseau
Journal of Library and Information Science , 2002,
Abstract: 頁次:4-13 This article describes some indicators provided by ISI’s Journal Citation Reports (edition 1998) for the field of geosciences. This field is subdivided in twenty categories. Average values of the journal impact factor, total number of citations, immediacy index, and the number of source items are given and discussed. It is concluded that these indicators have lower values than the average journals covered by the JCR.
Can Scientific Journals be Classified in terms of Aggregated Journal-Journal Citation Relations using the Journal Citation Reports?  [PDF]
Loet Leydesdorff
Computer Science , 2009,
Abstract: The aggregated citation relations among journals included in the Science Citation Index provide us with a huge matrix which can be analyzed in various ways. Using principal component analysis or factor analysis, the factor scores can be used as indicators of the position of the cited journals in the citing dimensions of the database. Unrotated factor scores are exact, and the extraction of principal components can be made stepwise since the principal components are independent. Rotation may be needed for the designation, but in the rotated solution a model is assumed. This assumption can be legitimated on pragmatic or theoretical grounds. Since the resulting outcomes remain sensitive to the assumptions in the model, an unambiguous classification is no longer possible in this case. However, the factor-analytic solutions allow us to test classifications against the structures contained in the database. This will be demonstrated for the delineation of a set of biochemistry journals.
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