Search (29 results, page 1 of 2)

  • × author_ss:"Leydesdorff, L."
  • × type_ss:"a"
  • × year_i:[2000 TO 2010}
  1. Leydesdorff, L.: ¬The construction and globalization of the knowledge base in inter-human communication systems (2003) 0.03 
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    Date
    22. 5.2003 19:48:04
    Source
    Canadian Journal of Communication 28(2003), H.3, S. -
  2. Leydesdorff, L.: Can networks of journal-journal citations be used as indicators of change in the social sciences? (2003) 0.01 
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    Date
    6.11.2005 19:02:22
    Source
    Journal of documentation. 59(2003) no.1, S.84-104
  3. Leydesdorff, L.; Sun, Y.: National and international dimensions of the Triple Helix in Japan : university-industry-government versus international coauthorship relations (2009) 0.01 
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    Date
    22. 3.2009 19:07:20
    Source
    Journal of the American Society for Information Science and Technology. 60(2009) no.4, S.778-788
  4. Leydesdorff, L.: How are new citation-based journal indicators adding to the bibliometric toolbox? (2009) 0.01 
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    Abstract
    The launching of Scopus and Google Scholar, and methodological developments in social-network analysis have made many more indicators for evaluating journals available than the traditional impact factor, cited half-life, and immediacy index of the ISI. In this study, these new indicators are compared with one another and with the older ones. Do the various indicators measure new dimensions of the citation networks, or are they highly correlated among themselves? Are they robust and relatively stable over time? Two main dimensions are distinguished - size and impact - which together shape influence. The h-index combines the two dimensions and can also be considered as an indicator of reach (like Indegree). PageRank is mainly an indicator of size, but has important interactions with centrality measures. The Scimago Journal Ranking (SJR) indicator provides an alternative to the journal impact factor, but the computation is less easy.
    Source
    Journal of the American Society for Information Science and Technology. 60(2009) no.7, S.1327-1336
  5. Leydesdorff, L.: Should co-occurrence data be normalized : a rejoinder (2007) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.14, S.2411-2413
  6. Leydesdorff, L.; Bensman, S.: Classification and Powerlaws : the logarithmic transformation (2006) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 57(2006) no.11, S.1470-1486
  7. Leydesdorff, L.; Heimeriks, G.: ¬The self-organization of the European information society : the case of "biotechnology" (2001) 0.00 
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    Footnote
    Vgl. auch die Stellungnahme von P. van den Besselaar: Empirical evidence of self-organization? in: JASIST 54(2003) no.1, S.87-90.
    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.14, S.1262-1274
  8. Leydesdorff, L.: Dynamic and evolutionary updates of classificatory schemes in scientific journal structures (2002) 0.00 
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    Source
    Journal of the American Society for Information Science and technology. 53(2002) no.12, S.987-994
  9. Leydesdorff, L.: Similarity measures, author cocitation Analysis, and information theory (2005) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 56(2005) no.7, S.769-772
  10. Leydesdorff, L.; Zhou, P.: Co-word analysis using the Chinese character set (2008) 0.00 
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    Journal of the American Society for Information Science and Technology. 59(2008) no.9, S.1528-1530
  11. Leydesdorff, L.: ¬The university-industry knowledge relationship : analyzing patents and the science base of technologies (2004) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 55(2004) no.11, S.991-1001
  12. Leydesdorff, L.: Clusters and maps of science journals based on bi-connected graphs in Journal Citation Reports (2004) 0.00 
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    Source
    Journal of documentation. 60(2004) no.4, S.371-427
  13. Leydesdorff, L.; Bihui, J.: Mapping the Chinese Science Citation Database in terms of aggregated journal-journal citation relations (2005) 0.00 
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    Journal of the American Society for Information Science and Technology. 56(2005) no.14, S.1469-1479
  14. Leydesdorff, L.: Can scientific journals be classified in terms of aggregated journal-journal citation relations using the Journal Citation Reports? (2006) 0.00 
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    Journal of the American Society for Information Science and Technology. 57(2006) no.5, S.601-613
  15. Zhou, P.; Leydesdorff, L.: ¬A comparison between the China Scientific and Technical Papers and Citations Database and the Science Citation Index in terms of journal hierarchies and interjournal citation relations (2007) 0.00 
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    Journal of the American Society for Information Science and Technology. 58(2007) no.2, S.223-236
  16. Leydesdorff, L.: Betweenness centrality as an indicator of the interdisciplinarity of scientific journals (2007) 0.00 
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    Journal of the American Society for Information Science and Technology. 58(2007) no.9, S.1303-1319
  17. Leydesdorff, L.: On the normalization and visualization of author co-citation data : Salton's Cosine versus the Jaccard index (2008) 0.00 
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    Journal of the American Society for Information Science and Technology. 59(2008) no.1, S.77-85
  18. Leydesdorff, L.: Caveats for the use of citation indicators in research and journal evaluations (2008) 0.00 
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    Journal of the American Society for Information Science and Technology. 59(2008) no.2, S.278-287
  19. Leydesdorff, L.: Patent classifications as indicators of intellectual organization (2008) 0.00 
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    Journal of the American Society for Information Science and Technology. 59(2008) no.10, S.1582-1597
  20. Leydesdorff, L.; Schank, T.: Dynamic animations of journal maps : indicators of structural changes and interdisciplinary developments (2008) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 59(2008) no.11, S.1810-1818

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