Search (52 results, page 1 of 3)

  • × author_ss:"Leydesdorff, L."
  • × year_i:[2010 TO 2020}
  1. Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019) 0.05
    0.052033834 = product of:
      0.10406767 = sum of:
        0.10406767 = sum of:
          0.06718902 = weight(_text_:l in 4681) [ClassicSimilarity], result of:
            0.06718902 = score(doc=4681,freq=4.0), product of:
              0.18031335 = queryWeight, product of:
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.045365814 = queryNorm
              0.37262368 = fieldWeight in 4681, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.046875 = fieldNorm(doc=4681)
          0.03687865 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
            0.03687865 = score(doc=4681,freq=2.0), product of:
              0.15886335 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045365814 = 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
  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) 0.04
    0.04336153 = product of:
      0.08672306 = sum of:
        0.08672306 = sum of:
          0.055990852 = weight(_text_:l in 4186) [ClassicSimilarity], result of:
            0.055990852 = score(doc=4186,freq=4.0), product of:
              0.18031335 = queryWeight, product of:
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.045365814 = queryNorm
              0.31051973 = fieldWeight in 4186, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.0390625 = fieldNorm(doc=4186)
          0.030732209 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
            0.030732209 = score(doc=4186,freq=2.0), product of:
              0.15886335 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045365814 = 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
  3. Hellsten, I.; Leydesdorff, L.: ¬The construction of interdisciplinarity : the development of the knowledge base and programmatic focus of the journal Climatic Change, 1977-2013 (2016) 0.04
    0.03516186 = product of:
      0.07032372 = sum of:
        0.07032372 = sum of:
          0.03959151 = weight(_text_:l in 3089) [ClassicSimilarity], result of:
            0.03959151 = score(doc=3089,freq=2.0), product of:
              0.18031335 = queryWeight, product of:
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.045365814 = queryNorm
              0.2195706 = fieldWeight in 3089, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.0390625 = fieldNorm(doc=3089)
          0.030732209 = weight(_text_:22 in 3089) [ClassicSimilarity], result of:
            0.030732209 = score(doc=3089,freq=2.0), product of:
              0.15886335 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045365814 = queryNorm
              0.19345059 = fieldWeight in 3089, 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=3089)
      0.5 = coord(1/2)
    
    Date
    24. 8.2016 17:53:22
  4. Leydesdorff, L.; Johnson, M.W.; Ivanova, I.: Toward a calculus of redundancy : signification, codification, and anticipation in cultural evolution (2018) 0.04
    0.03516186 = product of:
      0.07032372 = sum of:
        0.07032372 = sum of:
          0.03959151 = weight(_text_:l in 4463) [ClassicSimilarity], result of:
            0.03959151 = score(doc=4463,freq=2.0), product of:
              0.18031335 = queryWeight, product of:
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.045365814 = queryNorm
              0.2195706 = fieldWeight in 4463, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9746525 = idf(docFreq=2257, maxDocs=44218)
                0.0390625 = fieldNorm(doc=4463)
          0.030732209 = weight(_text_:22 in 4463) [ClassicSimilarity], result of:
            0.030732209 = score(doc=4463,freq=2.0), product of:
              0.15886335 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045365814 = queryNorm
              0.19345059 = fieldWeight in 4463, 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=4463)
      0.5 = coord(1/2)
    
    Date
    29. 9.2018 11:22:09
  5. Bornmann, L.; Leydesdorff, L.: Statistical tests and research assessments : a comment on Schneider (2012) (2013) 0.03
    0.03359451 = product of:
      0.06718902 = sum of:
        0.06718902 = product of:
          0.13437805 = sum of:
            0.13437805 = weight(_text_:l in 752) [ClassicSimilarity], result of:
              0.13437805 = score(doc=752,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.74524736 = fieldWeight in 752, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.09375 = fieldNorm(doc=752)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  6. Leydesdorff, L.; Wagner, C,; Bornmann, L.: Replicability and the public/private divide (2016) 0.03
    0.03359451 = product of:
      0.06718902 = sum of:
        0.06718902 = product of:
          0.13437805 = sum of:
            0.13437805 = weight(_text_:l in 3023) [ClassicSimilarity], result of:
              0.13437805 = score(doc=3023,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.74524736 = fieldWeight in 3023, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.09375 = fieldNorm(doc=3023)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  7. Leydesdorff, L.: Accounting for the uncertainty in the evaluation of percentile ranks (2012) 0.02
    0.023754906 = product of:
      0.04750981 = sum of:
        0.04750981 = product of:
          0.09501962 = sum of:
            0.09501962 = weight(_text_:l in 447) [ClassicSimilarity], result of:
              0.09501962 = score(doc=447,freq=2.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.52696943 = fieldWeight in 447, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.09375 = fieldNorm(doc=447)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  8. Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014) 0.02
    0.019596798 = product of:
      0.039193597 = sum of:
        0.039193597 = product of:
          0.07838719 = sum of:
            0.07838719 = weight(_text_:l in 1238) [ClassicSimilarity], result of:
              0.07838719 = score(doc=1238,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.4347276 = fieldWeight in 1238, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1238)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  9. Leydesdorff, L.; Bornmann, L.; Mutz, R.; Opthof, T.: Turning the tables on citation analysis one more time : principles for comparing sets of documents (2011) 0.02
    0.016797256 = product of:
      0.03359451 = sum of:
        0.03359451 = product of:
          0.06718902 = sum of:
            0.06718902 = weight(_text_:l in 4485) [ClassicSimilarity], result of:
              0.06718902 = score(doc=4485,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.37262368 = fieldWeight in 4485, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4485)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  10. 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) 0.02
    0.016797256 = product of:
      0.03359451 = sum of:
        0.03359451 = product of:
          0.06718902 = sum of:
            0.06718902 = weight(_text_:l in 4767) [ClassicSimilarity], result of:
              0.06718902 = score(doc=4767,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.37262368 = fieldWeight in 4767, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4767)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  11. Leydesdorff, L.; Bornmann, L.: Mapping (USPTO) patent data using overlays to Google Maps (2012) 0.02
    0.016797256 = product of:
      0.03359451 = sum of:
        0.03359451 = product of:
          0.06718902 = sum of:
            0.06718902 = weight(_text_:l in 288) [ClassicSimilarity], result of:
              0.06718902 = score(doc=288,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.37262368 = fieldWeight in 288, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=288)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  12. 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) 0.02
    0.016797256 = product of:
      0.03359451 = sum of:
        0.03359451 = product of:
          0.06718902 = sum of:
            0.06718902 = weight(_text_:l in 1108) [ClassicSimilarity], result of:
              0.06718902 = score(doc=1108,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.37262368 = fieldWeight in 1108, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1108)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  13. 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) 0.02
    0.016797256 = product of:
      0.03359451 = sum of:
        0.03359451 = product of:
          0.06718902 = sum of:
            0.06718902 = weight(_text_:l in 2779) [ClassicSimilarity], result of:
              0.06718902 = score(doc=2779,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.37262368 = fieldWeight in 2779, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2779)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  14. Leydesdorff, L.; Bornmann, L.: Integrated impact indicators compared with impact factors : an alternative research design with policy implications (2011) 0.01
    0.013997713 = product of:
      0.027995426 = sum of:
        0.027995426 = product of:
          0.055990852 = sum of:
            0.055990852 = weight(_text_:l in 4919) [ClassicSimilarity], result of:
              0.055990852 = score(doc=4919,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.31051973 = fieldWeight in 4919, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=4919)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  15. 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) 0.01
    0.013997713 = product of:
      0.027995426 = sum of:
        0.027995426 = product of:
          0.055990852 = sum of:
            0.055990852 = weight(_text_:l in 532) [ClassicSimilarity], result of:
              0.055990852 = score(doc=532,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.31051973 = fieldWeight in 532, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=532)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  16. Bornmann, L.; Wagner, C.; Leydesdorff, L.: BRICS countries and scientific excellence : a bibliometric analysis of most frequently cited papers (2015) 0.01
    0.013997713 = product of:
      0.027995426 = sum of:
        0.027995426 = product of:
          0.055990852 = sum of:
            0.055990852 = weight(_text_:l in 2047) [ClassicSimilarity], result of:
              0.055990852 = score(doc=2047,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.31051973 = fieldWeight in 2047, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2047)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  17. Bauer, J.; Leydesdorff, L.; Bornmann, L.: Highly cited papers in Library and Information Science (LIS) : authors, institutions, and network structures (2016) 0.01
    0.013997713 = product of:
      0.027995426 = sum of:
        0.027995426 = product of:
          0.055990852 = sum of:
            0.055990852 = weight(_text_:l in 3231) [ClassicSimilarity], result of:
              0.055990852 = score(doc=3231,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.31051973 = fieldWeight in 3231, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=3231)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  18. 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) 0.01
    0.013997713 = product of:
      0.027995426 = sum of:
        0.027995426 = product of:
          0.055990852 = sum of:
            0.055990852 = weight(_text_:l in 5225) [ClassicSimilarity], result of:
              0.055990852 = score(doc=5225,freq=4.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.31051973 = fieldWeight in 5225, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5225)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  19. 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) 0.01
    0.013857029 = product of:
      0.027714059 = sum of:
        0.027714059 = product of:
          0.055428118 = sum of:
            0.055428118 = weight(_text_:l in 4466) [ClassicSimilarity], result of:
              0.055428118 = score(doc=4466,freq=2.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.30739886 = fieldWeight in 4466, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=4466)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  20. 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) 0.01
    0.011877453 = product of:
      0.023754906 = sum of:
        0.023754906 = product of:
          0.04750981 = sum of:
            0.04750981 = weight(_text_:l in 3436) [ClassicSimilarity], result of:
              0.04750981 = score(doc=3436,freq=2.0), product of:
                0.18031335 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.045365814 = queryNorm
                0.26348472 = fieldWeight in 3436, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3436)
          0.5 = coord(1/2)
      0.5 = coord(1/2)