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Loet Leydesdorff loet at LEYDESDORFF.NET
Sun Nov 19 03:16:19 EST 2006

Now available at and :


 <> Local Citation Impact
Environments of 7,525 Scientific Journals in 2005 ("cited")
Local Citation Activity  <>
Environments of 7,525 Scientific Journals in 2005 ("citing")

One can click on any of the journal names and obtain the Pajek file
corresponding to the citation impact environment of the journal ("cited" or
"citing," respectively). See for further explanation: "Visualization of the
Citation  <> Impact Environment of
Scientific Journals: An online mapping exercise," Journal of the Amererican
Society for Information Science and Technology (forthcoming).
<> <pdf version> 

The 2005 matrices are based on taking the one-percent threshold of "total
citations" after correction for within-journal citations. This main-diagonal
value is sometimes so large that it overshadows the environment and
therefore it is no longer included in setting the threshold for the
delineation of the set.

* 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> loet at ;

Now available:
The Knowledge-Based Economy: Modeled, Measured, Simulated. 385 pp.; US$
The Self-Organization of the Knowledge-Based Society;
The Challenge of Scientometrics

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