Search (11 results, page 1 of 1)

  • × author_ss:"Leydesdorff, L."
  • × author_ss:"Bornmann, L."
  • × theme_ss:"Informetrie"
  1. Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019) 0.02
    0.016805485 = product of:
      0.03361097 = sum of:
        0.03361097 = sum of:
          0.0029551024 = weight(_text_:s in 4681) [ClassicSimilarity], result of:
            0.0029551024 = score(doc=4681,freq=2.0), product of:
              0.04100075 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.03771094 = queryNorm
              0.072074346 = fieldWeight in 4681, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046875 = fieldNorm(doc=4681)
          0.030655868 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
            0.030655868 = score(doc=4681,freq=2.0), product of:
              0.13205728 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.03771094 = queryNorm
              0.23214069 = fieldWeight in 4681, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=4681)
      0.5 = coord(1/2)
    
    Date
    8. 1.2019 18:22:45
    Source
    Journal of the Association for Information Science and Technology. 70(2019) no.2, S.198-201
  2. Leydesdorff, L.; Bornmann, L.: How fractional counting of citations affects the impact factor : normalization in terms of differences in citation potentials among fields of science (2011) 0.01
    0.014004571 = product of:
      0.028009143 = sum of:
        0.028009143 = sum of:
          0.0024625852 = weight(_text_:s in 4186) [ClassicSimilarity], result of:
            0.0024625852 = score(doc=4186,freq=2.0), product of:
              0.04100075 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.03771094 = queryNorm
              0.060061958 = fieldWeight in 4186, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.0390625 = fieldNorm(doc=4186)
          0.025546558 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
            0.025546558 = score(doc=4186,freq=2.0), product of:
              0.13205728 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.03771094 = queryNorm
              0.19345059 = fieldWeight in 4186, 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=4186)
      0.5 = coord(1/2)
    
    Date
    22. 1.2011 12:51:07
    Source
    Journal of the American Society for Information Science and Technology. 62(2011) no.2, S.217-229
  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
    8.619048E-4 = product of:
      0.0017238096 = sum of:
        0.0017238096 = product of:
          0.0034476193 = sum of:
            0.0034476193 = weight(_text_:s in 1238) [ClassicSimilarity], result of:
              0.0034476193 = score(doc=1238,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.08408674 = fieldWeight in 1238, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1238)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the Association for Information Science and Technology. 65(2014) no.4, S.751-764
  4. 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
    7.387756E-4 = product of:
      0.0014775512 = sum of:
        0.0014775512 = product of:
          0.0029551024 = sum of:
            0.0029551024 = weight(_text_:s in 4767) [ClassicSimilarity], result of:
              0.0029551024 = score(doc=4767,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.072074346 = fieldWeight in 4767, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4767)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 62(2011) no.10, S.1954-1962
  5. 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
    7.387756E-4 = product of:
      0.0014775512 = sum of:
        0.0014775512 = product of:
          0.0029551024 = sum of:
            0.0029551024 = weight(_text_:s in 1108) [ClassicSimilarity], result of:
              0.0029551024 = score(doc=1108,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.072074346 = fieldWeight in 1108, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1108)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 64(2013) no.11, S.2299-2309
  6. Leydesdorff, L.; Bornmann, L.: ¬The operationalization of "fields" as WoS subject categories (WCs) in evaluative bibliometrics : the cases of "library and information science" and "science & technology studies" (2016) 0.00
    7.387756E-4 = product of:
      0.0014775512 = sum of:
        0.0014775512 = product of:
          0.0029551024 = sum of:
            0.0029551024 = weight(_text_:s in 2779) [ClassicSimilarity], result of:
              0.0029551024 = score(doc=2779,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.072074346 = fieldWeight in 2779, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2779)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the Association for Information Science and Technology. 67(2016) no.3, S.707-714
  7. Leydesdorff, L.; Bornmann, L.: Integrated impact indicators compared with impact factors : an alternative research design with policy implications (2011) 0.00
    6.156463E-4 = product of:
      0.0012312926 = sum of:
        0.0012312926 = product of:
          0.0024625852 = sum of:
            0.0024625852 = weight(_text_:s in 4919) [ClassicSimilarity], result of:
              0.0024625852 = score(doc=4919,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.060061958 = fieldWeight in 4919, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=4919)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 62(2011) no.11, S.2133-2146
  8. Leydesdorff, L.; Zhou, P.; Bornmann, L.: How can journal impact factors be normalized across fields of science? : An assessment in terms of percentile ranks and fractional counts (2013) 0.00
    6.156463E-4 = product of:
      0.0012312926 = sum of:
        0.0012312926 = product of:
          0.0024625852 = sum of:
            0.0024625852 = weight(_text_:s in 532) [ClassicSimilarity], result of:
              0.0024625852 = score(doc=532,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.060061958 = fieldWeight in 532, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=532)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 64(2013) no.1, S.96-107
  9. Bornmann, L.; Wagner, C.; Leydesdorff, L.: BRICS countries and scientific excellence : a bibliometric analysis of most frequently cited papers (2015) 0.00
    6.156463E-4 = product of:
      0.0012312926 = sum of:
        0.0012312926 = product of:
          0.0024625852 = sum of:
            0.0024625852 = weight(_text_:s in 2047) [ClassicSimilarity], result of:
              0.0024625852 = score(doc=2047,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.060061958 = fieldWeight in 2047, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2047)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the Association for Information Science and Technology. 66(2015) no.7, S.1507-1513
  10. Bauer, J.; Leydesdorff, L.; Bornmann, L.: Highly cited papers in Library and Information Science (LIS) : authors, institutions, and network structures (2016) 0.00
    6.156463E-4 = product of:
      0.0012312926 = sum of:
        0.0012312926 = product of:
          0.0024625852 = sum of:
            0.0024625852 = weight(_text_:s in 3231) [ClassicSimilarity], result of:
              0.0024625852 = score(doc=3231,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.060061958 = fieldWeight in 3231, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=3231)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the Association for Information Science and Technology. 67(2016) no.12, S.3095-3100
  11. Leydesdorff, L.; Bornmann, L.; Mingers, J.: Statistical significance and effect sizes of differences among research universities at the level of nations and worldwide based on the Leiden rankings (2019) 0.00
    6.156463E-4 = product of:
      0.0012312926 = sum of:
        0.0012312926 = product of:
          0.0024625852 = sum of:
            0.0024625852 = weight(_text_:s in 5225) [ClassicSimilarity], result of:
              0.0024625852 = score(doc=5225,freq=2.0), product of:
                0.04100075 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.03771094 = queryNorm
                0.060061958 = fieldWeight in 5225, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5225)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the Association for Information Science and Technology. 70(2019) no.5, S.509-525