***** To join INSNA, visit http://www.insna.org ***** Dear colleagues, Input files for generating journal maps for the journals contained in the Science Citation Index and the Social Science Citation Index 2007 are now available at http://www.leydesdorff.net/jcr07/cited for the local citation impact environments of journals and at http://www.leydesdorff.net/jcr07/citing for the citation activity environment of each journal. The files are in the so-called Pajek format. (The visualization program Pajek is freely available at http://vlado.fmf.uni-lj.si/pub/networks/pajek/. ) The files are based on including all journals which contribute to the total citations (cited and citing, respectively) to the extent of more than 1% (after substraction of the journal "self"-citations). In order to enhance visualization effects (using, for example, Kamada-Kawai in Pajek) cosine values are provided for cosine > 0.2. For those of you who read this message under html, the following example is provided for the local citation impact environment of Scientometrics: The lines indicate strenght of the similarity in being-cited patterns in this local citation environment of Scientometrics. These files can also be used as lists of journals which provide a reference for comparing among journals in relevant citation environments in terms of impact factors, etc. See for more details about the methodology, my paper entitled "Visualization of the Citation Impact Environment of Scientific Journals: An online mapping exercise," Journal of the Amererican Society for Information Science and Technology 58(1), 25-38, 2007 <http://www.leydesdorff.net/jcr04/index.htm> <http://www.leydesdorff.net/jcr04/jcr2pajek.pdf> Best wishes, Loet ** apologies for cross-postings ________________________________ Loet Leydesdorff, Amsterdam School of Communications Research (ASCoR), Kloveniersburgwal 48, 1012 CX Amsterdam. [log in to unmask] <http://www.leydesdorff.net/> _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.