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Med line does not contain citation data but only authors, titles, etc. The
only way to create co-citation sets over a long period is to use web of
science, that is Thomson Scientific data.
I have used centrality measures applied to co-citations data for analysing
the transformation of physics in the period 1900-1945 . I present the
results next week at ISSI 2007 in Madrid. The paper:
«Mapping the Changing Centrality of Physicists (1900-1944)»
is accessible on my web site: www.chss.uqam.ca.
Le 19/06/07 15:00, « Paul Willems » <[log in to unmask]> a écrit :
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> Dear All,
> I am currently doing my master thesis about finding trends in scientific
> communication. My work is affiliated with Dr. Detlef Schoders Department of
> Information Systems and Information Management at the University of Cologne
> (www.wim.uni-koeln.de) and supported by Dr. Kai Fischbach from Cologne and
> Dr. Peter Gloor from the MIT.
> We are looking for ways to obtain a large set (approximately 30 years) of
> data from the Medline database, which for example is accessible through
> www.ncbi.nlm.nih.gov/entrez and through many other interfaces. The data
> shall be used to create two different kinds of (dynamic) networks:
> 1. Coauthorship networks
> 2. Citation networks
> In these networks, we want to find trends and trendsetters by applying SNA
> methods like calculating centrality values and by applying information
> retrieval methods on the content (article titles and abstracts). Therfore it
> is vital to get not only article titles and authors but also abstracts and
> citation data.
> The current question is how to get the data which is neccessary to create
> these two networks with emphasis on the problem of getting citation data.
> Has anyone of you done similar research before and could provide us help on
> how to obtain the data? Any further suggestions on how to proceed and
> related work are also welcome.
> Best regards
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