***** To join INSNA, visit http://www.insna.org ***** 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/> _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.