One of you asked me about these types of networks. My colleague Loet Leydesdorff from the University of Amsterdam is one of the leading scholars on citation links, and he has also created software and analysis tools to take such links from the SSCI and other easily-available resources. Click on the title to get to his website (same link as at bottom below.)
Interactive Overlays on the basis of Aggregated
Journal-Journal Citations
2011
The overlays can be made on the basis of any download
from the (Social) Science Citation Index at the Web-of-Science in the
(so-called) tagged format. The procedure for generating overlay maps on the
basis of journals is analogous to the one for 2009 data described in: Loet
Leydesdorff & Ismael Rafols, Interactive Overlays: A New Method for
Generating Global Journal Maps from Web-of-Science Data, Journal of
Informetrics 6(3) (2012), 318-332. The number of journals included in 2011 is
10,675 (JCR 2011 for the Science Edition and Social Science Edition combined,
v. 1; July 2012).
The single major difference with the previous maps is
clustering on the basis of the decomposition algorithm of Blondel et al. (2008)
as default.
Previously, we used clustering as provided by VOSViewer
(Waltman et al., 2010). However, the two clustering results are both available,
and the user can change this option. Examples and instruction are provided at
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