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Interactive overlays: A new method for generating global journal maps from Web-of-Science data

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  • Leydesdorff, Loet
  • Rafols, Ismael

Abstract

Recent advances in methods and techniques enable us to develop interactive overlays to a global map of science based on aggregated citation relations among the 9162 journals contained in the Science Citation Index and Social Science Citation Index 2009. We first discuss the pros and cons of the various options: cited versus citing, multidimensional scaling versus spring-embedded algorithms, VOSViewer versus Gephi, and the various clustering algorithms and similarity criteria. Our approach focuses on the positions of journals in the multidimensional space spanned by the aggregated journal–journal citations. Using VOSViewer for the resulting mapping, a number of choices can be left to the user; we provide default options reflecting our preferences. Some examples are also provided; for example, the potential of using this technique to assess the interdisciplinarity of organizations and/or document sets.

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  • Leydesdorff, Loet & Rafols, Ismael, 2012. "Interactive overlays: A new method for generating global journal maps from Web-of-Science data," Journal of Informetrics, Elsevier, vol. 6(2), pages 318-332.
    • Handle: RePEc:eee:infome:v:6:y:2012:i:2:p:318-332
    DOI: 10.1016/j.joi.2011.11.003
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    References listed on IDEAS

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    2. Loet Leydesdorff & Félix de Moya-Anegón & Vicente P. Guerrero-Bote, 2010. "Journal maps on the basis of Scopus data: A comparison with the Journal Citation Reports of the ISI," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 61(2), pages 352-369, February.
    3. Loet Leydesdorff & Ismael Rafols, 2011. "Local emergence and global diffusion of research technologies: An exploration of patterns of network formation," Journal of the American Society for Information Science and Technology, Association for Information Science & Technology, vol. 62(5), pages 846-860, May.
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    Map; Journal; Overlay; VOSViewer; Gephi;
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