Toward a consensus map of science
Journal of the American Society for Information Science and Technology
Hybrid clustering for validation and improvement of subject-classification schemes
Information Processing and Management: an International Journal
Journal of the American Society for Information Science and Technology
Analysis of the time evolution of scientograms using the subdue graph mining algorithm
IPMU'10 Proceedings of the Computational intelligence for knowledge-based systems design, and 13th international conference on Information processing and management of uncertainty
Mapping scientific institutions
Scientometrics
Scientometrics
Mapping (USPTO) patent data using overlays to Google Maps
Journal of the American Society for Information Science and Technology
Complex systems science: Dreams of universality, interdisciplinarity reality
Journal of the American Society for Information Science and Technology
Journal of the American Society for Information Science and Technology
Journal of the American Society for Information Science and Technology
Bibliometric perspectives on medical innovation using the medical subject Headings of PubMed
Journal of the American Society for Information Science and Technology
Science is all in the eye of the beholder: Keyword maps in Google scholar citations
Journal of the American Society for Information Science and Technology
The many dimensions of laboratories' interdisciplinarity
Scientometrics
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The decomposition of scientific literature into disciplinary and subdisciplinary structures is one of the core goals of scientometrics. How can we achieve a good decomposition? The ISI subject categories classify journals included in the Science Citation Index (SCI). The aggregated journal-journal citation matrix contained in the Journal Citation Reports can be aggregated on the basis of these categories. This leads to an asymmetrical matrix (citing versus cited) that is much more densely populated than the underlying matrix at the journal level. Exploratory factor analysis of the matrix of subject categories suggests a 14-factor solution. This solution could be interpreted as the disciplinary structure of science. The nested maps of science (corresponding to 14 factors, 172 categories, and 6,164 journals) are online at . Presumably, inaccuracies in the attribution of journals to the ISI subject categories average out so that the factor analysis reveals the main structures. The mapping of science could, therefore, be comprehensive and reliable on a large scale albeit imprecise in terms of the attribution of journals to the ISI subject categories. © 2009 Wiley Periodicals, Inc.