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 <http://www.leydesdorff.net/jcr04/index.htm> Visualization of the Citation Impact Environments of Scientific Journals: An online mapping exercise

 <http://www.leydesdorff.net/jcr04/jcr2pajek.pdf>  <http://www.leydesdorff.net/jcr04/jcr2pajek.pdf> <click here for the PDF version>

Abstract: The 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 vector-space model is used for the normalization and the results are brought online as input-files for the visualization program Pajek. The user thus is able to analyze the citation environment in terms of links and graphs. Furthermore, the local impact of a journal is defined as the 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 for providing the same information after correction for the 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 journal. As a policy application, the mechanism of interdisciplinary developments among the sciences is elaborated for the case of nanotechnology journals.


2003

2004


cited journal files from the  <http://www.leydesdorff.net/jcr03/cited> SCI 

cited journal files from the  <http://www.leydesdorff.net/jcr04/cited> SCI 


citing journal files from  <http://www.leydesdorff.net/jcr03/citing> the SCI

citing journal files from  <http://www.leydesdorff.net/jcr04/citing> the SCI


cited journal files from  <http://www.leydesdorff.net/jcr03s/cited> the SoSCI

cited journal files from  <http://www.leydesdorff.net/jcr04s/cited> the SoSCI


citing journal files from  <http://www.leydesdorff.net/jcr03s/citing> the SoSCI

citing journal files from  <http://www.leydesdorff.net/jcr04s/citing> the SoSCI

 
** apologies for cross-postings. This is a draft version; comments and suggestions are welcome.
  _____  


Loet Leydesdorff 
Amsterdam School of Communications Research (ASCoR)
Kloveniersburgwal 48, 1012 CX Amsterdam
Tel.: +31-20- 525 6598; fax: +31-20- 525 3681 
[log in to unmask]  <mailto:[log in to unmask]> ; http://www.leydesdorff.net/ 

 

The Challenge of  <http://www.upublish.com/books/leydesdorff-sci.htm> Scientometrics; The  <http://www.upublish.com/books/leydesdorff.htm> Self-Organization of the Knowledge-Based Society

 
 

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