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[Loet Leydesdorff]

Dear colleagues,



I made a preprint version of an article entitled "Clusters and Maps of
Science Journals Based on Bi-connected Graphs in the Journal Citation
Reports" available at http://www.leydesdorff.net/jcr01/art



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. 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 using algorithms within the freeware
program Pajek for the visualization.



The classification with the visualizations can be found at
<http://www.leydesdorff.net/jcr01> http://www.leydesdorff.net/jcr01 .
Comments are very welcome in this stage.



With kind regards,





Loet


  _____

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


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

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