Centrality Measures for Journals included in the JCR

Loet Leydesdorff loet at LEYDESDORFF.NET
Thu Jun 8 04:22:30 EDT 2006

Centrality Measures of  <http://www.leydesdorff.net/centrality/index.htm>
7379 Journals included in

the  <http://www.leydesdorff.net/centrality/index.htm> Science Citation
Index and Social Science Citation Index 2004

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  <http://www.leydesdorff.net/sci_sosci/index.htm>
Interdisciplinarity at the Interfaces between the Science Citation Index and
the Social Science Citation Index, 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
<http://www.leydesdorff.net/jcr04> 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> >

.       "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
 <mailto:loet at leydesdorff.net> loet at leydesdorff.net ;
<http://www.leydesdorff.net/> http://www.leydesdorff.net/

 <http://www.leydesdorff.net/knbecon> The Knowledge-Based Economy: Modeled,
Measured, and Simulated
The Self-Organization of the Knowledge-Based Society;
The Challenge of Scientometrics

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