mapping the knowledge base of an institutionally defined document set

[Tobias Opthof]

> Thank you Loet,
> 
> for sending this. I am involved in a comparison of the output of hospitals
> active in cardiology with as one of the aims a comparison of academic and
> non-academic hospitals. I have the feeling that this program might be very
> useful.
> 
> I will contact you in the New Year. For the moment thank you very much.
> 
> Best wishes,
> 
> Tobias Opthof
> 
> 
> Adminstrative info for SIGMETRICS (for example unsubscribe):
> http://web.utk.edu/~gwhitney/sigmetrics.html
>  
> BibJourn.exe <http://www.leydesdorff.net/software/bibjourn/bibjourn.exe>  for
> Cocitation Analysis of Journal Names in References
> 
> 
> 
> This program enables one to generate a representation of the knowledge base of
> a document set. This can also be used as an indicator of the knowledge base of
> an institutional set, for example, by downloading the recent papers of the
> authors involved. (BibJourn.exe is freely available for academic usage.)
> 
> The program uses a set saved using ISI¹s Web of Science as input, and
> generates various forms of output:
>  
> 1. cosine.dat provides an input file for Pajek as a visual representation of
> the bibliographic coupling among authors within this set, but unlike
> BibCoupl.exe, the representation is not in terms of the authors, but in terms
> of the cited references. The matrix is normalized using the cosine.
> 2. coocc.dat and matrix.dbf are the files which underly cosine.dat. Coocc.dat
> is the file before normalization; and matrix.dbf the asymmetrical data matrix.
> The latter file can be used for statistical analysis in SPSS, the former for
> graph-analytical analysis using UCINet.
> 3. Like ISI.EXE, the program BibCoupl.EXE produces four databases containing
> the information in the original input set in relational format: au.dbf with
> the authors; cs.dbf with the address (³corporate sources²); core.dbf with
> information which is unique for each record (e.g., the title); and cr.dbf
> containing the cited references. The files are linked through the numbers in
> core.dbf. If one needs only these files, one is advised to use ISI.EXE, since
> the computation of the cosine is computer intensive, and therefore
> time-consuming. 
>  
> The routine creating the matrix and the cosine-normalized output uses the
> journal names in the file cr.dbf as variable names, and the records in
> core.dbf as the cases (rows). Only journals occurring twice among the cited
> references are included. The number of journals is limited to 1024, but the
> number of cited references is unlimited.
>  
> The program is based on DOS-legacy software. It runs in a MS-Dos Command Box
> under Windows. The programs and the input files have to be contained in the
> same folder. The output files are written into this directory. Please, note
> that existing files from a previous run are overwritten by the program. The
> user is advised to save output elsewhere if one wishes to continue with these
> materials.
>  
> input files 
>  
> The input file has to be saved as a so-called marked list in the tagged format
> from the Science Citation Index (Social Science Citation Index, Arts &
> Humanities Citation Index) at the Web-of-Science. The default filename
> ³savedrecs.txt² should not be used, but ³data.txt² instead.
>   
> output files
>  
> The program produces four output files in dBase IV format. These files can be
> read into Excel and/or SPSS for further processing. They can also be used in
> MS Access for relational database management. These files can be produced by
> using the simpler ISI.EXE (which is much less intensive in the computation).
>  
> Like BibCoupl, BibJourn additionally produces two files with the extension
> ³.dat² (cosine.dat and coocc.dat) are in DL-format (ASCII) which can be read
> directly into Pajek for the visualization (Pajek is freely available at
> http://vlado.fmf.uni-lj.si/pub/networks/pajek/ ). A number of additional
> databases are coproduced:
>  
> a. matrix.dbf contains the matrix of the documents as the cases and the
> journal names in the references in the set as the variables. This file can be
> imported into SPSS for further analysis.
>  
> b. coocc.dbf contains a co-occurrence matrix of the journal names from this
> same data. This matrix is symmetrical and it contains the journal names both
> as variables and as labels in the first field. The main diagonal is set to
> zero. The number of co-occurrences is equal to the multiplication of
> occurrences in each of the texts. (The procedure is similar to using the file
> matrix.dbf as input to the routine ³affiliations² in UCINet, but the main
> diagonal is here set to zero in this matrix.) The file coocc.dat contains this
> information in the DL-format.
>  
> c. cosine.dbf contains a normalized co-occurrence matrix of the journal names
> from the same data. Normalization is based on the cosine between the variables
> conceptualized as vectors (Salton & McGill, 1983). (The procedure is similar
> to using the file matrix.dbf as input to the corresponding routing in SPSS.)
> The file cosine.dat contains this information in the DL-format.
> 
> Click here to download BibJourn.EXE
> <http://www.leydesdorff.net/Software/BibJourn/BibJourn.EXE>
> 
> 
> Click here to download BibCoupl.EXE
> <http://www.leydesdorff.net/Software/ISI/BibCoupl.EXE>
> Click here to download ISI.EXE
> <http://www.leydesdorff.net/software/isi/isi.exe>
>  
> Click here for similar programs for Full Text and Co-Word Analysis
> <http://www.leydesdorff.net/software/fulltext/index.htm>
>  
> 
> 
> Loet Leydesdorff 
> Amsterdam School of Communications Research (ASCoR)
> Kloveniersburgwal 48, 1012 CX Amsterdam
> Tel.: +31-20- 525 6598; fax: +31-20- 525 3681
> loet at leydesdorff.net  <mailto:loet at leydesdorff.net> ;
> http://www.leydesdorff.net/ <http://www.leydesdorff.net/>
>  
> Now available: The Knowledge-Based Economy: Modeled, Measured, Simulated
> <http://www.universal-publishers.com/book.php?method=ISBN&book=1581129378>
> . 385 pp.; US$ 18.95
> The Self-Organization of the Knowledge-Based Society
> <http://www.universal-publishers.com/book.php?method=ISBN&book=1581126956>
> ; The Challenge of Scientometrics
> <http://www.universal-publishers.com/book.php?method=ISBN&book=1581126816>
>  
>  
>  
> 


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