Centrality Measures for 7,525 Scientific Journals included in the Journal Citation Reports 2005

Loet Leydesdorff loet at LEYDESDORFF.NET
Tue Dec 5 13:54:05 EST 2006

 <http://www.leydesdorff.net/jcr05/centrality/index.htm> Centrality Measures
of 7525 Journals included in 
the Science Citation Index and Social Science Citation Index 2005 

*	See for definitions of the centrality measures: R. A. Hanneman & M.
Riddle (2005). Introduction to Social Network Methods. Riverside, CA:
University of California, Riverside; at http://faculty.ucr.edu/~hanneman/. 

*	The program UCINET is available at http://www.analytictech.com/;
Pajek at http://vlado.fmf.uni-lj.si/pub/networks/pajek/ . 

*	The cited patterns are used as the row variables and the citing
patterns as the column variables. 

See for more information about the data: 

*	Visualization of the Citation  <http://www.leydesdorff.net/jcr04>
Impact Environments of Scientific Journals: An online mapping exercise,
Journal of the American Society for Information Science and Technology
(forthcoming). <pdf-version <http://www.leydesdorff.net/jcr04/jcr2pajek.pdf>

*	Mapping  <http://www.leydesdorff.net/sci_sosci/index.htm>
Interdisciplinarity at the Interfaces between the Science Citation Index and
the Social Science Citation Index, Scientometrics 71(3), 2007, forthcoming;
<pdf-version <http://www.leydesdorff.net/sci_sosci/sci+sosci.pdf> > 

*	"Betweenness  <http://www.leydesdorff.net/betweenness/index.htm>
Centrality" as an Indicator of the "Interdisciplinarity" of Scientific
Journals, Journal of the American Society for Information Science and
Technology (forthcoming). <pdf-version
<http://www.leydesdorff.net/betweenness/betweenness.pdf> > 

The values are based on using Pajek and the two-mode matrix of 7525 rows and
columns. The corresponding data for 2004 can be found here
<http://www.leydesdorff.net/jcr04/centrality/index.htm> .
PS. The file is large ( > 4 MByte) and it may some time for the download.
**  Apologies for cross-postings.

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/ 

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