Citation impact environments of scientific journals

[Steven A. Morris]

Loet,

This is neat stuff.

Are the original citing-cited matrices available anywhere?

Thanks,

Steve Morris



On Wed, 5 Jan 2005 09:12:18 +0100, Loet Leydesdorff <loet at LEYDESDORFF.NET>
wrote:

>Citation environments for the 5907  <http://www.leydesdorff.net/jcr03/cited>
>journals included in the Science Citation Index 2003 are now available in
>the cited dimension at http://www.leydesdorff.net/jcr03/cited for processing
>using Pajek.
>
>The journal names provide links to text-files which can be imported into
>Pajek for the visualization of their respective citation environments. Pajek
>can be retrieved at  <http://vlado.fmf.uni-lj.si/pub/networks/pajek/>
>http://vlado.fmf.uni-lj.si/pub/networks/pajek/ . Its use is free for
>academic purposes. The files below are also freeware for academic purposes.
>Users may wish to provide a reference, for example, to my paper "
><http://www.leydesdorff.net/sosci01/art> Top-down Decomposition of the
>Journal Citation Report of the Social Science Citation Index: Graph- and
>factor-analytical approaches. Scientometrics 60 (2), 2004, 159-180.
>
>
>
><http://users.fmg.uva.nl/lleydesdorff/jcr03/cited/index_files/image001.jpg>
>
>
>The citation environment of the journal Nanotechnology in 2003 (cited;
>cosine ?  0.5).
>
>The citation environments are limited to those journals which cite the seed
>journal more than one percent of its total citation rate or which are being
>cited by this journal to more than one percent of its citation pattern.
>(These two criteria operate independently.) These visualizations are based
>on the cited-patterns of the journals. (See at
><http://www.leydesdorff.net/jcr03/citing>
>http://www.leydesdorff.net/jcr03/citing for the corresponding files in the
>citing dimension.)
>
>The cosine between the citation vectors is used insofar as it is ?  0.2.
>Within Pajek one can increase this threshold (by using: Transform > Remove).
>The representation of the citation patterns of Nanotechnology in the figure,
>for example, is based on using a cosine ?  0.5.
>
>The files can be edited as ASCII text files. One can read them into Pajek
>using the menu File > Network > Read, Choose the file name. By partitioning
>the file (e.g., in terms of its core using Net > Partition) one can colour
>the visualizations into different groupings (File > Partition > Edit). Using
>the Options within the screen with the visualization (Draw > Partition) one
>can vary the size of lines (e.g., 3), the arrows (e.g., 0), and the fonts
>(e.g., 12).
>
>** 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 leydesdorff.net> loet at leydesdorff.net ;
><http://www.leydesdorff.net/> http://www.leydesdorff.net/
>
>
> <http://www.upublish.com/books/leydesdorff-sci.htm> The Challenge of
>Scientometrics ;  <http://www.upublish.com/books/leydesdorff.htm> The
>Self-Organization of the Knowledge-Based Society
>
>