Search (3 results, page 1 of 1)

  • × author_ss:"Leeuwen, T.N. van"
  • × theme_ss:"Informetrie"
  1. Costas, R.; Bordons, M.; Leeuwen, T.N. van; Raan, A.F.J. van: Scaling rules in the science system : Influence of field-specific citation characteristics on the impact of individual researchers (2009) 0.02
    0.020404754 = product of:
      0.03060713 = sum of:
        0.015379278 = weight(_text_:m in 2759) [ClassicSimilarity], result of:
          0.015379278 = score(doc=2759,freq=2.0), product of:
            0.11187479 = queryWeight, product of:
              2.4884486 = idf(docFreq=9980, maxDocs=44218)
              0.044957645 = queryNorm
            0.13746867 = fieldWeight in 2759, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4884486 = idf(docFreq=9980, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2759)
        0.015227851 = product of:
          0.030455703 = sum of:
            0.030455703 = weight(_text_:22 in 2759) [ClassicSimilarity], result of:
              0.030455703 = score(doc=2759,freq=2.0), product of:
                0.15743402 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044957645 = queryNorm
                0.19345059 = fieldWeight in 2759, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2759)
          0.5 = coord(1/2)
      0.6666667 = coord(2/3)
    
    Date
    22. 3.2009 19:02:48
  2. Costas, R.; Leeuwen, T.N. van; Bordons, M.: ¬A bibliometric classificatory approach for the study and assessment of research performance at the individual level : the effects of age on productivity and impact (2010) 0.01
    0.006151711 = product of:
      0.018455133 = sum of:
        0.018455133 = weight(_text_:m in 3700) [ClassicSimilarity], result of:
          0.018455133 = score(doc=3700,freq=2.0), product of:
            0.11187479 = queryWeight, product of:
              2.4884486 = idf(docFreq=9980, maxDocs=44218)
              0.044957645 = queryNorm
            0.1649624 = fieldWeight in 3700, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4884486 = idf(docFreq=9980, maxDocs=44218)
              0.046875 = fieldNorm(doc=3700)
      0.33333334 = coord(1/3)
    
  3. Costas, R.; Leeuwen, T.N. van; Bordons, M.: Referencing patterns of individual researchers : do top scientists rely on more extensive information sources? (2012) 0.01
    0.005126426 = product of:
      0.015379278 = sum of:
        0.015379278 = weight(_text_:m in 516) [ClassicSimilarity], result of:
          0.015379278 = score(doc=516,freq=2.0), product of:
            0.11187479 = queryWeight, product of:
              2.4884486 = idf(docFreq=9980, maxDocs=44218)
              0.044957645 = queryNorm
            0.13746867 = fieldWeight in 516, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4884486 = idf(docFreq=9980, maxDocs=44218)
              0.0390625 = fieldNorm(doc=516)
      0.33333334 = coord(1/3)