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Centrality Measures of 7379 Journals included in the Science Citation Index
and Social Science Citation Index 2004; at
<http://www.leydesdorff.net/centrality/index.htm> 

The four centrality measures used by UCINET were applied to the aggregated
journal-journal citations contained in the Journal Citation Reports of the
Science Citation Index 2004 and Social Science Citation Index 2004. 

.       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/ .
The large number of decimals is copied from the output of UCINET. The user
may wish to adapt this to one's own preference. 

.       The cited patterns are used as the row variables and the citing
patterns as the column variables; the measures thus provide centrality in
terms of "being cited."

See for more information about the data:

.       Mapping Interdisciplinarity at the Interfaces between the Science
Citation Index and the Social Science Citation Index
<http://www.leydesdorff.net/sci_sosci/index.htm> , Paper presented at the
International Conference on Network Science, NetSci 2006, Bloomington, IN,
May 22-25, 2006; <pdf-version
<http://www.leydesdorff.net/sci_sosci/sci+sosci.pdf> >

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

.       "Betweenness as an Indicator of Interdisciplinarity of Scientific
Journals." Paper to be presented at the 9th International S&T Indicators
Conference. Leuven (Belgium), September 7-9, 2006.

The download file <http://www.leydesdorff.net/jcr04/centrality/index.htm>
is large; a browser may need a bit of time

** 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 
[log in to unmask] <mailto:[log in to unmask]> ;
http://www.leydesdorff.net/ <http://www.leydesdorff.net/>  

 

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