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Global Maps of Science based on the new Web-of-Science Categories
http://arxiv.org/abs/1202.1914 

In August 2011, Thomson Reuters launched version 5 of the Science and Social
Science Citation Index in the Web of Science (WoS). Among other things, the
222 ISI Subject Categories (SCs) for these two databases in version 4 of WoS
were renamed and extended to 225 WoS Categories (WCs). Since we previously
used the ISI SCs as the baseline for a global map in Pajek (Rafols et al.,
2010) and brought this facility online (at
http://www.leydesdorff.net/overlaytoolkit), we recalibrated this map for the
new WC categories using the Journal Citation Reports 2010. In addition to
Pajek, the new base maps can also be made using VOSviewer (Van Eck &
Waltman, 2010). 

Loet Leydesdorff, Stephen Carley, Ismael Rafols
** apologies for cross postings
________________________________________
Amsterdam School of Communications Research (ASCoR)
Kloveniersburgwal 48, 1012 CX Amsterdam.
Tel. +31-20-525 6598; fax: +31-842239111
[log in to unmask] ; http://www.leydesdorff.net/ 
Visiting Professor, ISTIC, Beijing; Honorary Fellow, SPRU, University of
Sussex; http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en  

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