Search (65 results, page 2 of 4)

  • × author_ss:"Leydesdorff, L."
  • × theme_ss:"Informetrie"
  1. Leydesdorff, L.: Similarity measures, author cocitation Analysis, and information theory (2005) 0.00
    1.1039667E-4 = product of:
      0.0034222968 = sum of:
        0.0034222968 = weight(_text_:e in 3471) [ClassicSimilarity], result of:
          0.0034222968 = score(doc=3471,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.1111659 = fieldWeight in 3471, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3471)
      0.032258064 = coord(1/31)
    
    Language
    e
  2. Leydesdorff, L.; Shin, J.C.: How to evaluate universities in terms of their relative citation impacts : fractional counting of citations and the normalization of differences among disciplines (2011) 0.00
    1.1039667E-4 = product of:
      0.0034222968 = sum of:
        0.0034222968 = weight(_text_:e in 4466) [ClassicSimilarity], result of:
          0.0034222968 = score(doc=4466,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.1111659 = fieldWeight in 4466, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0546875 = fieldNorm(doc=4466)
      0.032258064 = coord(1/31)
    
    Language
    e
  3. Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014) 0.00
    1.1039667E-4 = product of:
      0.0034222968 = sum of:
        0.0034222968 = weight(_text_:e in 1238) [ClassicSimilarity], result of:
          0.0034222968 = score(doc=1238,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.1111659 = fieldWeight in 1238, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1238)
      0.032258064 = coord(1/31)
    
    Language
    e
  4. Leydesdorff, L.: Why words and co-word cannot map the development of the science (1997) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 147) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=147,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 147, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=147)
      0.032258064 = coord(1/31)
    
    Language
    e
  5. Leydesdorff, L.; Bihui, J.: Mapping the Chinese Science Citation Database in terms of aggregated journal-journal citation relations (2005) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 4813) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=4813,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 4813, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=4813)
      0.032258064 = coord(1/31)
    
    Language
    e
  6. Leydesdorff, L.; Bensman, S.: Classification and Powerlaws : the logarithmic transformation (2006) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 6007) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=6007,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 6007, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=6007)
      0.032258064 = coord(1/31)
    
    Language
    e
  7. 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
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 70) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=70,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 70, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=70)
      0.032258064 = coord(1/31)
    
    Language
    e
  8. Leydesdorff, L.: Betweenness centrality as an indicator of the interdisciplinarity of scientific journals (2007) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 453) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=453,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 453, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=453)
      0.032258064 = coord(1/31)
    
    Language
    e
  9. Leydesdorff, L.: On the normalization and visualization of author co-citation data : Salton's Cosine versus the Jaccard index (2008) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 1341) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=1341,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 1341, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=1341)
      0.032258064 = coord(1/31)
    
    Language
    e
  10. Leydesdorff, L.: Caveats for the use of citation indicators in research and journal evaluations (2008) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 1361) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=1361,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 1361, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=1361)
      0.032258064 = coord(1/31)
    
    Language
    e
  11. Leydesdorff, L.: Patent classifications as indicators of intellectual organization (2008) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 2002) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=2002,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 2002, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=2002)
      0.032258064 = coord(1/31)
    
    Language
    e
  12. Bensman, S.J.; Leydesdorff, L.: Definition and identification of journals as bibliographic and subject entities : librarianship versus ISI Journal Citation Reports methods and their effect on citation measures (2009) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 2840) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=2840,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 2840, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=2840)
      0.032258064 = coord(1/31)
    
    Language
    e
  13. Leydesdorff, L.; Probst, C.: ¬The delineation of an interdisciplinary specialty in terms of a journal set : the case of communication studies (2009) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 2952) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=2952,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 2952, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=2952)
      0.032258064 = coord(1/31)
    
    Language
    e
  14. Leydesdorff, L.; Salah, A.A.A.: Maps on the basis of the Arts & Humanities Citation Index : the journals Leonardo and Art Journal versus "digital humanities" as a topic (2010) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 3436) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=3436,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 3436, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=3436)
      0.032258064 = coord(1/31)
    
    Language
    e
  15. Zhou, P.; Su, X.; Leydesdorff, L.: ¬A comparative study on communication structures of Chinese journals in the social sciences (2010) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 3580) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=3580,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 3580, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=3580)
      0.032258064 = coord(1/31)
    
    Language
    e
  16. Leydesdorff, L.; Opthof, T.: Scopus's source normalized impact per paper (SNIP) versus a journal impact factor based on fractional counting of citations (2010) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 4107) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=4107,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 4107, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=4107)
      0.032258064 = coord(1/31)
    
    Language
    e
  17. Bornmann, L.; Leydesdorff, L.: Which cities produce more excellent papers than can be expected? : a new mapping approach, using Google Maps, based on statistical significance testing (2011) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 4767) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=4767,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 4767, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=4767)
      0.032258064 = coord(1/31)
    
    Language
    e
  18. Leydesdorff, L.; Rotolo, D.; Rafols, I.: Bibliometric perspectives on medical innovation using the medical subject headings of PubMed (2012) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 494) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=494,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 494, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=494)
      0.032258064 = coord(1/31)
    
    Language
    e
  19. Leydesdorff, L.; Radicchi, F.; Bornmann, L.; Castellano, C.; Nooy, W. de: Field-normalized impact factors (IFs) : a comparison of rescaling and fractionally counted IFs (2013) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 1108) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=1108,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 1108, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=1108)
      0.032258064 = coord(1/31)
    
    Language
    e
  20. Rotolo, D.; Leydesdorff, L.: Matching Medline/PubMed data with Web of Science: A routine in R language (2015) 0.00
    9.462571E-5 = product of:
      0.0029333972 = sum of:
        0.0029333972 = weight(_text_:e in 2224) [ClassicSimilarity], result of:
          0.0029333972 = score(doc=2224,freq=2.0), product of:
            0.03078549 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.02141793 = queryNorm
            0.09528506 = fieldWeight in 2224, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=2224)
      0.032258064 = coord(1/31)
    
    Language
    e