Search (9 results, page 1 of 1)

  • × author_ss:"Eck, N.J. van"
  1. Waltman, L.; Eck, N.J. van: Some comments on the question whether co-occurrence data should be normalized (2007) 0.01
    0.0111976955 = product of:
      0.022395391 = sum of:
        0.022395391 = product of:
          0.044790782 = sum of:
            0.044790782 = weight(_text_:society in 583) [ClassicSimilarity], result of:
              0.044790782 = score(doc=583,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.25794208 = fieldWeight in 583, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=583)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.11, S.1701-1703
  2. Eck, N.J. van; Waltman, L.: Appropriate similarity measures for author co-citation analysis (2008) 0.01
    0.0111976955 = product of:
      0.022395391 = sum of:
        0.022395391 = product of:
          0.044790782 = sum of:
            0.044790782 = weight(_text_:society in 2008) [ClassicSimilarity], result of:
              0.044790782 = score(doc=2008,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.25794208 = fieldWeight in 2008, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=2008)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 59(2008) no.10, S.1653-1661
  3. Waltman, L.; Eck, N.J. van: ¬The relation between eigenfactor, audience factor, and influence weight (2010) 0.01
    0.0111976955 = product of:
      0.022395391 = sum of:
        0.022395391 = product of:
          0.044790782 = sum of:
            0.044790782 = weight(_text_:society in 3596) [ClassicSimilarity], result of:
              0.044790782 = score(doc=3596,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.25794208 = fieldWeight in 3596, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3596)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 61(2010) no.7, S.1476-1486
  4. Waltman, L.; Eck, N.J. van; Raan, A.F.J. van: Universality of citation distributions revisited (2012) 0.01
    0.0111976955 = product of:
      0.022395391 = sum of:
        0.022395391 = product of:
          0.044790782 = sum of:
            0.044790782 = weight(_text_:society in 4963) [ClassicSimilarity], result of:
              0.044790782 = score(doc=4963,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.25794208 = fieldWeight in 4963, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=4963)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 63(2012) no.1, S.72-77
  5. Eck, N.J. van; Waltman, L.: How to normalize cooccurrence data? : an analysis of some well-known similarity measures (2009) 0.01
    0.009598024 = product of:
      0.019196048 = sum of:
        0.019196048 = product of:
          0.038392097 = sum of:
            0.038392097 = weight(_text_:society in 2942) [ClassicSimilarity], result of:
              0.038392097 = score(doc=2942,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.22109321 = fieldWeight in 2942, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2942)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 60(2009) no.8, S.1635-1651
  6. Eck, N.J. van; Waltman, L.; Dekker, R.; Berg, J. van den: ¬A comparison of two techniques for bibliometric mapping : multidimensional scaling and VOS (2010) 0.01
    0.009598024 = product of:
      0.019196048 = sum of:
        0.019196048 = product of:
          0.038392097 = sum of:
            0.038392097 = weight(_text_:society in 4112) [ClassicSimilarity], result of:
              0.038392097 = score(doc=4112,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.22109321 = fieldWeight in 4112, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4112)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 61(2010) no.12, S.2405-2416
  7. Waltman, L.; Eck, N.J. van: ¬The inconsistency of the h-index : the case of web accessibility in Western European countries (2012) 0.01
    0.009598024 = product of:
      0.019196048 = sum of:
        0.019196048 = product of:
          0.038392097 = sum of:
            0.038392097 = weight(_text_:society in 40) [ClassicSimilarity], result of:
              0.038392097 = score(doc=40,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.22109321 = fieldWeight in 40, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.046875 = fieldNorm(doc=40)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 63(2012) no.2, S.406-415
  8. Waltman, L.; Eck, N.J. van: ¬A new methodology for constructing a publication-level classification system of science : keyword maps in Google scholar citations (2012) 0.01
    0.007998354 = product of:
      0.015996708 = sum of:
        0.015996708 = product of:
          0.031993415 = sum of:
            0.031993415 = weight(_text_:society in 511) [ClassicSimilarity], result of:
              0.031993415 = score(doc=511,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.18424435 = fieldWeight in 511, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=511)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 63(2012) no.12, S.2378-2392
  9. Waltman, L.; Calero-Medina, C.; Kosten, J.; Noyons, E.C.M.; Tijssen, R.J.W.; Eck, N.J. van; Leeuwen, T.N. van; Raan, A.F.J. van; Visser, M.S.; Wouters, P.: ¬The Leiden ranking 2011/2012 : data collection, indicators, and interpretation (2012) 0.01
    0.007998354 = product of:
      0.015996708 = sum of:
        0.015996708 = product of:
          0.031993415 = sum of:
            0.031993415 = weight(_text_:society in 514) [ClassicSimilarity], result of:
              0.031993415 = score(doc=514,freq=2.0), product of:
                0.17364666 = queryWeight, product of:
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.05206517 = queryNorm
                0.18424435 = fieldWeight in 514, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3351789 = idf(docFreq=4279, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=514)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 63(2012) no.12, S.2405-2418