networks among cities on the basis of the Science Citation Index

[Loet Leydesdorff]

Dear Chaomei, 

Let me add a few lines after evaluating both options.

CiteSpace offers a great environment. It is Java-based and the interface
with Google Earth works smoothly. The results are great for presentation
purposes. However, I could not find an option to export the coauthor network
in a Pajek file. 

CityColl is based on DOS and therefore legacy software. However, they offer
the user the matrix of documents versus addresses (asymmetrical) for
statistical analysis as well as the corresponding input files for Pajek.
Unlike Google Earth, one can have an American, Asian and European address in
a single "map" without having to turn the earth :-)

It is nice that we have both options available. 

Best wishes, 


Loet
 

> -----Original Message-----
> From: Chen,Chaomei [mailto:cc345 at drexel.edu] 
> Sent: Monday, November 09, 2009 2:34 PM
> To: loet at leydesdorff.net; SIGMETRICS at LISTSERV.UTK.EDU
> Subject: RE: [SIGMETRICS] networks among cities on the basis 
> of the Science Citation Index
> 
> Dear Loet,
> 
> That's a nice addition. 
> Just to mention that CiteSpace has a function under the 
> Geospatial Maps menu, which
>  generates geospatial maps in KML format based on city names 
> from authors' affiliations.
> Users may opt to include coauthor links between cities.
> These files are viewable in Google Earth.
> 
> Here are some examples of its use:
> 
> Chen, C., Zhu, W., Tomaszewski, B., MacEachren, A. (2007) 
> Tracing conceptual and geospatial diffusion of knowledge. HCI 
> International 2007. Beijing, China. July 22-27, 2007. LNCS, 
> 4564. pp. 265-274. 
> http://cluster.cis.drexel.edu/~cchen/papers/confs/jcdl2007.pdf
> 
> Chen, C., Song, I.Y., Yuan, X., Zhang, J. (2008) The thematic 
> and citation landscape of Data and Knowledge Engineering 
> (1985-2007). Data and Knowledge Engineering, 67(2), 234-259. 
> http://cluster.cis.drexel.edu/~cchen/papers/2008/dke2008.pdf
> 
> CiteSpace is available at:
> http://cluster.cis.drexel.edu/~cchen/citespace
> 
> Best wishes,
> Chaomei 
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Chaomei Chen, Ph.D. Associate Professor
> College of Information Science and Technology, Drexel University
> Editor in Chief, Information Visualization
> ChangJiang Scholar Visiting Professor, Dalian University of Technology
> Homepage: http://www.pages.drexel.edu/~cc345
> IVS: http://www.palgrave-journals.com/ivs/index.html
> CiteSpace: http://cluster.cis.drexel.edu/~cchen/citespace
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ________________________________________
> From: ASIS&T Special Interest Group on Metrics 
> [SIGMETRICS at LISTSERV.UTK.EDU] On Behalf Of Loet Leydesdorff 
> [loet at leydesdorff.net]
> Sent: Monday, November 09, 2009 3:45 AM
> To: SIGMETRICS at LISTSERV.UTK.EDU
> Subject: [SIGMETRICS] networks among cities on the basis of 
> the Science Citation Index
> 
> Adminstrative info for SIGMETRICS (for example unsubscribe):
> http://web.utk.edu/~gwhitney/sigmetrics.html
> 
> Dear colleagues,
> 
> In the series of programs available from
> http://www.leydesdorff.net/indicators for analyzing data from 
> the major
> Science & Technology databases in terms of networks of 
> communication, I
> added one which enables the user to extract city names in the 
> address field
> as a separate networks. This program may prove useful, for 
> example, in the
> regional geography of science.
> 
> Currently, the program was tested for city names and 
> postcodes in the US,
> Western Europe (including the UK and some Commonwealth 
> nations), China and
> Japan. I expect problems in other parts of the world. Please, 
> provide me
> with feedback if such is the case. (Preferentially send me 
> the download
> records that cause the problems.) The program is available at
> http://www.leydesdorff.net/software/CityColl/index.htm .
> 
> Let me take the opportunity to mention also the availability 
> of Pajek input
> files for mapping the citation environments of the 1,157 
> journals included
> in the Arts & Humanities Citation Index 2008, at
> http://www.leydesdorff.net/ah08/index.htm . These journals 
> can be studied in
> terms of both their cited and citing patterns using these 
> files. The data
> contains cosine-normalized matrices of the k = 1 environments of these
> journals (without thresholds).
> 
> With best wishes,
> 
> 
> Loet Leydesdorff
> 
> ________________________________
> 
> Loet Leydesdorff
> Amsterdam School of Communications Research (ASCoR)
> Kloveniersburgwal 48, 1012 CX Amsterdam.
> Tel. +31-20-525 6598; fax: +31-842239111
> loet at leydesdorff.net; http://www.leydesdorff.net/
>