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Yes, scientific specialties and disciplines can excellently be mapped using
aggregated journal-journal citations as available from the producers of the
Science Citation Index (the Journal Citation Reports). These citations
follow a powerlaw distribution, but not in the interesting part of the
distribution, that is, the core set of journals which shape specialties
(let's say the first 20-50 most cited journals).

I brought Pajek files online for all journals in the (Social) Science
Citation Index at .

With kind regards,

Loet  _____

Loet Leydesdorff
Amsterdam School of Communications Research (ASCoR)
Kloveniersburgwal 48, 1012 CX Amsterdam
Tel.: +31-20- 525 6598; fax: +31-20- 525 3681
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> -----Original Message-----
> From: Ryan Lanham [mailto:[log in to unmask]]
> Sent: Thursday, February 03, 2005 8:15 PM
> To: Loet Leydesdorff; [log in to unmask]
> Subject: Re: All Networks Look the Same?
> > Do you have an advice about medication against my infection
> by your ideas?
> That technology will I'm sure be perfected by many; I have
> noticed certain undergraduate students who are able to ward
> them off by sleep.
> The word network will be used many ways.  I am not sure the
> use of the word in research, given its gelatinous nature,
> will constitute a single network except in the very loosest
> sense--or as Valdis says, the criteria for a link are very
> low.  Disciplines, however, are clearly rather strong links.
> Best,
> Ryan

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