Global Maps of Science based on the new Web-of-Science Categories

[Loet Leydesdorff]

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). A new set of 74
Subject Categories (SCs) was added, but at a higher level of aggregation.
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 this http
URL <http://www.leydesdorff.net/overlaytoolkit> ), we recalibrated this map
for the new WC categories using the Journal Citation Reports 2010. In the
new installation, the base maps can also be made using VOSviewer (Van Eck &
Waltman, 2010). 

 



Figure 2: Disciplinary composition of 5,468 citable items (articles,
proceedings papers, and reviews) published in 2009 with an address at the
University of Cambridge; Rao-Stirling = 0.851. (VOSviewer used for the
visualization.)

 

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

 <mailto:loet at leydesdorff.net> loet at leydesdorff.net ;
<http://www.leydesdorff.net/> http://www.leydesdorff.net/ 
Visiting Professor,  <http://www.istic.ac.cn/Eng/brief_en.html> ISTIC,
Beijing; Honorary Fellow,  <http://www.sussex.ac.uk/spru/> SPRU, University
of Sussex;  <http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en>
http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en  



 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.asis.org/pipermail/sigmetrics/attachments/20120210/031d4ae9/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 37883 bytes
Desc: image003.jpg
URL: <http://mail.asis.org/pipermail/sigmetrics/attachments/20120210/031d4ae9/attachment.jpg>