Document (#36964)

Author
Waltman, L.
Eck, N.J. van
Raan, A.F.J. van
Title
Universality of citation distributions revisited
Source
Journal of the American Society for Information Science and Technology. 63(2012) no.1, S.72-77
Year
2012
Abstract
Radicchi, Fortunato, and Castellano (2008) claim that, apart from a scaling factor, all fields of science are characterized by the same citation distribution. We present a large-scale validation study of this universality-of-citation-distributions claim. Our analysis shows that claiming citation distributions to be universal for all fields of science is not warranted. Although many fields indeed seem to have fairly similar citation distributions, there are exceptions as well. We also briefly discuss the consequences of our findings for the measurement of scientific impact using citation-based bibliometric indicators.
Theme
Informetrie

Similar documents (author)

  1. Raan, A.F.J. van: Scientometrics : state of the art (1997) 3.48
    3.4796808 = sum of:
      3.4796808 = product of:
        5.219521 = sum of:
          2.55166 = weight(author_txt:raan in 409) [ClassicSimilarity], result of:
            2.55166 = score(doc=409,freq=1.0), product of:
              0.57155216 = queryWeight, product of:
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.06401164 = queryNorm
              4.4644394 = fieldWeight in 409, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.5 = fieldNorm(doc=409)
          2.667861 = weight(author_txt:a.f.j in 409) [ClassicSimilarity], result of:
            2.667861 = score(doc=409,freq=1.0), product of:
              0.58877516 = queryWeight, product of:
                1.014955 = boost
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.06401164 = queryNorm
              4.531205 = fieldWeight in 409, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.5 = fieldNorm(doc=409)
        0.6666667 = coord(2/3)
    
  2. Raan, A.F.J. van: ¬The influence of international collaboration on the impact of research results (1998) 3.48
    3.4796808 = sum of:
      3.4796808 = product of:
        5.219521 = sum of:
          2.55166 = weight(author_txt:raan in 6120) [ClassicSimilarity], result of:
            2.55166 = score(doc=6120,freq=1.0), product of:
              0.57155216 = queryWeight, product of:
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.06401164 = queryNorm
              4.4644394 = fieldWeight in 6120, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.5 = fieldNorm(doc=6120)
          2.667861 = weight(author_txt:a.f.j in 6120) [ClassicSimilarity], result of:
            2.667861 = score(doc=6120,freq=1.0), product of:
              0.58877516 = queryWeight, product of:
                1.014955 = boost
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.06401164 = queryNorm
              4.531205 = fieldWeight in 6120, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.5 = fieldNorm(doc=6120)
        0.6666667 = coord(2/3)
    
  3. Raan, A.F.J. van: Statistical properties of bibliometric indicators : research group indicator distributions and correlations (2006) 3.48
    3.4796808 = sum of:
      3.4796808 = product of:
        5.219521 = sum of:
          2.55166 = weight(author_txt:raan in 275) [ClassicSimilarity], result of:
            2.55166 = score(doc=275,freq=1.0), product of:
              0.57155216 = queryWeight, product of:
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.06401164 = queryNorm
              4.4644394 = fieldWeight in 275, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.5 = fieldNorm(doc=275)
          2.667861 = weight(author_txt:a.f.j in 275) [ClassicSimilarity], result of:
            2.667861 = score(doc=275,freq=1.0), product of:
              0.58877516 = queryWeight, product of:
                1.014955 = boost
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.06401164 = queryNorm
              4.531205 = fieldWeight in 275, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.5 = fieldNorm(doc=275)
        0.6666667 = coord(2/3)
    
  4. Raan, A.F.J. van: Performance-related differences of bibliometric statistical properties of research groups : cumulative advantages and hierarchically layered networks (2006) 3.48
    3.4796808 = sum of:
      3.4796808 = product of:
        5.219521 = sum of:
          2.55166 = weight(author_txt:raan in 345) [ClassicSimilarity], result of:
            2.55166 = score(doc=345,freq=1.0), product of:
              0.57155216 = queryWeight, product of:
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.06401164 = queryNorm
              4.4644394 = fieldWeight in 345, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.5 = fieldNorm(doc=345)
          2.667861 = weight(author_txt:a.f.j in 345) [ClassicSimilarity], result of:
            2.667861 = score(doc=345,freq=1.0), product of:
              0.58877516 = queryWeight, product of:
                1.014955 = boost
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.06401164 = queryNorm
              4.531205 = fieldWeight in 345, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.5 = fieldNorm(doc=345)
        0.6666667 = coord(2/3)
    
  5. Raan, A.F.J. van: Bibliometric statistical properties of the 100 largest European research universities : prevalent scaling rules in the science system (2008) 3.48
    3.4796808 = sum of:
      3.4796808 = product of:
        5.219521 = sum of:
          2.55166 = weight(author_txt:raan in 2372) [ClassicSimilarity], result of:
            2.55166 = score(doc=2372,freq=1.0), product of:
              0.57155216 = queryWeight, product of:
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.06401164 = queryNorm
              4.4644394 = fieldWeight in 2372, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.928879 = idf(docFreq=15, maxDocs=44421)
                0.5 = fieldNorm(doc=2372)
          2.667861 = weight(author_txt:a.f.j in 2372) [ClassicSimilarity], result of:
            2.667861 = score(doc=2372,freq=1.0), product of:
              0.58877516 = queryWeight, product of:
                1.014955 = boost
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.06401164 = queryNorm
              4.531205 = fieldWeight in 2372, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.5 = fieldNorm(doc=2372)
        0.6666667 = coord(2/3)
    

Similar documents (content)

  1. Perianes-Rodriguez, A.; Ruiz-Castillo, J.: University citation distributions (2016) 0.44
    0.441319 = sum of:
      0.441319 = product of:
        1.3791219 = sum of:
          0.032208595 = weight(abstract_txt:factor in 4152) [ClassicSimilarity], result of:
            0.032208595 = score(doc=4152,freq=1.0), product of:
              0.08886916 = queryWeight, product of:
                5.7988343 = idf(docFreq=365, maxDocs=44421)
                0.01532535 = queryNorm
              0.36242715 = fieldWeight in 4152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7988343 = idf(docFreq=365, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.04601352 = weight(abstract_txt:2008 in 4152) [ClassicSimilarity], result of:
            0.04601352 = score(doc=4152,freq=1.0), product of:
              0.11272672 = queryWeight, product of:
                1.126258 = boost
                6.5309834 = idf(docFreq=175, maxDocs=44421)
                0.01532535 = queryNorm
              0.40818647 = fieldWeight in 4152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5309834 = idf(docFreq=175, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.046377856 = weight(abstract_txt:consequences in 4152) [ClassicSimilarity], result of:
            0.046377856 = score(doc=4152,freq=1.0), product of:
              0.113320984 = queryWeight, product of:
                1.1292228 = boost
                6.548176 = idf(docFreq=172, maxDocs=44421)
                0.01532535 = queryNorm
              0.409261 = fieldWeight in 4152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.548176 = idf(docFreq=172, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.026673181 = weight(abstract_txt:science in 4152) [ClassicSimilarity], result of:
            0.026673181 = score(doc=4152,freq=2.0), product of:
              0.078370586 = queryWeight, product of:
                1.3280548 = boost
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.01532535 = queryNorm
              0.34034684 = fieldWeight in 4152, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.11163321 = weight(abstract_txt:claim in 4152) [ClassicSimilarity], result of:
            0.11163321 = score(doc=4152,freq=1.0), product of:
              0.25643393 = queryWeight, product of:
                2.4022996 = boost
                6.965269 = idf(docFreq=113, maxDocs=44421)
                0.01532535 = queryNorm
              0.43532932 = fieldWeight in 4152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.965269 = idf(docFreq=113, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.19366063 = weight(abstract_txt:universality in 4152) [ClassicSimilarity], result of:
            0.19366063 = score(doc=4152,freq=1.0), product of:
              0.37023214 = queryWeight, product of:
                2.8865328 = boost
                8.369263 = idf(docFreq=27, maxDocs=44421)
                0.01532535 = queryNorm
              0.5230789 = fieldWeight in 4152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.369263 = idf(docFreq=27, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.5560439 = weight(abstract_txt:distributions in 4152) [ClassicSimilarity], result of:
            0.5560439 = score(doc=4152,freq=7.0), product of:
              0.4926025 = queryWeight, product of:
                4.708719 = boost
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.01532535 = queryNorm
              1.1287882 = fieldWeight in 4152, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
          0.36651096 = weight(abstract_txt:citation in 4152) [ClassicSimilarity], result of:
            0.36651096 = score(doc=4152,freq=10.0), product of:
              0.37920868 = queryWeight, product of:
                5.0598683 = boost
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.01532535 = queryNorm
              0.9665152 = fieldWeight in 4152, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.0625 = fieldNorm(doc=4152)
        0.32 = coord(8/25)
    
  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) 0.20
    0.19839448 = sum of:
      0.19839448 = product of:
        0.82664365 = sum of:
          0.03618267 = weight(abstract_txt:indicators in 186) [ClassicSimilarity], result of:
            0.03618267 = score(doc=186,freq=1.0), product of:
              0.09603664 = queryWeight, product of:
                1.0395441 = boost
                6.0281444 = idf(docFreq=290, maxDocs=44421)
                0.01532535 = queryNorm
              0.37675902 = fieldWeight in 186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0281444 = idf(docFreq=290, maxDocs=44421)
                0.0625 = fieldNorm(doc=186)
          0.04601352 = weight(abstract_txt:2008 in 186) [ClassicSimilarity], result of:
            0.04601352 = score(doc=186,freq=1.0), product of:
              0.11272672 = queryWeight, product of:
                1.126258 = boost
                6.5309834 = idf(docFreq=175, maxDocs=44421)
                0.01532535 = queryNorm
              0.40818647 = fieldWeight in 186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5309834 = idf(docFreq=175, maxDocs=44421)
                0.0625 = fieldNorm(doc=186)
          0.037721574 = weight(abstract_txt:science in 186) [ClassicSimilarity], result of:
            0.037721574 = score(doc=186,freq=4.0), product of:
              0.078370586 = queryWeight, product of:
                1.3280548 = boost
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.01532535 = queryNorm
              0.48132312 = fieldWeight in 186, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.0625 = fieldNorm(doc=186)
          0.12560968 = weight(abstract_txt:fields in 186) [ClassicSimilarity], result of:
            0.12560968 = score(doc=186,freq=4.0), product of:
              0.20005022 = queryWeight, product of:
                2.5986907 = boost
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.01532535 = queryNorm
              0.6278907 = fieldWeight in 186, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.0625 = fieldNorm(doc=186)
          0.297218 = weight(abstract_txt:distributions in 186) [ClassicSimilarity], result of:
            0.297218 = score(doc=186,freq=2.0), product of:
              0.4926025 = queryWeight, product of:
                4.708719 = boost
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.01532535 = queryNorm
              0.60336274 = fieldWeight in 186, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.0625 = fieldNorm(doc=186)
          0.28389817 = weight(abstract_txt:citation in 186) [ClassicSimilarity], result of:
            0.28389817 = score(doc=186,freq=6.0), product of:
              0.37920868 = queryWeight, product of:
                5.0598683 = boost
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.01532535 = queryNorm
              0.7486595 = fieldWeight in 186, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.0625 = fieldNorm(doc=186)
        0.24 = coord(6/25)
    
  3. Bornmann, L.; Daniel, H.-D.: Universality of citation distributions : a validation of Radicchi et al.'s relative indicator cf = c/c0 at the micro level using data from chemistry (2009) 0.19
    0.1927624 = sum of:
      0.1927624 = product of:
        0.963812 = sum of:
          0.04601352 = weight(abstract_txt:2008 in 3954) [ClassicSimilarity], result of:
            0.04601352 = score(doc=3954,freq=1.0), product of:
              0.11272672 = queryWeight, product of:
                1.126258 = boost
                6.5309834 = idf(docFreq=175, maxDocs=44421)
                0.01532535 = queryNorm
              0.40818647 = fieldWeight in 3954, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5309834 = idf(docFreq=175, maxDocs=44421)
                0.0625 = fieldNorm(doc=3954)
          0.06280484 = weight(abstract_txt:fields in 3954) [ClassicSimilarity], result of:
            0.06280484 = score(doc=3954,freq=1.0), product of:
              0.20005022 = queryWeight, product of:
                2.5986907 = boost
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.01532535 = queryNorm
              0.31394535 = fieldWeight in 3954, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.0625 = fieldNorm(doc=3954)
          0.27387747 = weight(abstract_txt:universality in 3954) [ClassicSimilarity], result of:
            0.27387747 = score(doc=3954,freq=2.0), product of:
              0.37023214 = queryWeight, product of:
                2.8865328 = boost
                8.369263 = idf(docFreq=27, maxDocs=44421)
                0.01532535 = queryNorm
              0.73974526 = fieldWeight in 3954, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.369263 = idf(docFreq=27, maxDocs=44421)
                0.0625 = fieldNorm(doc=3954)
          0.297218 = weight(abstract_txt:distributions in 3954) [ClassicSimilarity], result of:
            0.297218 = score(doc=3954,freq=2.0), product of:
              0.4926025 = queryWeight, product of:
                4.708719 = boost
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.01532535 = queryNorm
              0.60336274 = fieldWeight in 3954, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.0625 = fieldNorm(doc=3954)
          0.28389817 = weight(abstract_txt:citation in 3954) [ClassicSimilarity], result of:
            0.28389817 = score(doc=3954,freq=6.0), product of:
              0.37920868 = queryWeight, product of:
                5.0598683 = boost
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.01532535 = queryNorm
              0.7486595 = fieldWeight in 3954, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.0625 = fieldNorm(doc=3954)
        0.2 = coord(5/25)
    
  4. Costas, R.; Perianes-Rodríguez, A.; Ruiz-Castillo, J.: On the quest for currencies of science : field "exchange rates" for citations and Mendeley readership (2017) 0.17
    0.17213333 = sum of:
      0.17213333 = product of:
        0.7172222 = sum of:
          0.031659838 = weight(abstract_txt:indicators in 51) [ClassicSimilarity], result of:
            0.031659838 = score(doc=51,freq=1.0), product of:
              0.09603664 = queryWeight, product of:
                1.0395441 = boost
                6.0281444 = idf(docFreq=290, maxDocs=44421)
                0.01532535 = queryNorm
              0.32966414 = fieldWeight in 51, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0281444 = idf(docFreq=290, maxDocs=44421)
                0.0546875 = fieldNorm(doc=51)
          0.04794213 = weight(abstract_txt:measurement in 51) [ClassicSimilarity], result of:
            0.04794213 = score(doc=51,freq=1.0), product of:
              0.12664151 = queryWeight, product of:
                1.1937475 = boost
                6.922344 = idf(docFreq=118, maxDocs=44421)
                0.01532535 = queryNorm
              0.3785657 = fieldWeight in 51, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.922344 = idf(docFreq=118, maxDocs=44421)
                0.0546875 = fieldNorm(doc=51)
          0.016503189 = weight(abstract_txt:science in 51) [ClassicSimilarity], result of:
            0.016503189 = score(doc=51,freq=1.0), product of:
              0.078370586 = queryWeight, product of:
                1.3280548 = boost
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.01532535 = queryNorm
              0.21057886 = fieldWeight in 51, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.0546875 = fieldNorm(doc=51)
          0.10990847 = weight(abstract_txt:fields in 51) [ClassicSimilarity], result of:
            0.10990847 = score(doc=51,freq=4.0), product of:
              0.20005022 = queryWeight, product of:
                2.5986907 = boost
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.01532535 = queryNorm
              0.5494044 = fieldWeight in 51, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.0546875 = fieldNorm(doc=51)
          0.3677885 = weight(abstract_txt:distributions in 51) [ClassicSimilarity], result of:
            0.3677885 = score(doc=51,freq=4.0), product of:
              0.4926025 = queryWeight, product of:
                4.708719 = boost
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.01532535 = queryNorm
              0.7466233 = fieldWeight in 51, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.0546875 = fieldNorm(doc=51)
          0.14342009 = weight(abstract_txt:citation in 51) [ClassicSimilarity], result of:
            0.14342009 = score(doc=51,freq=2.0), product of:
              0.37920868 = queryWeight, product of:
                5.0598683 = boost
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.01532535 = queryNorm
              0.37820888 = fieldWeight in 51, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.0546875 = fieldNorm(doc=51)
        0.24 = coord(6/25)
    
  5. Waltman, L.; Schreiber, M.: On the calculation of percentile-based bibliometric indicators (2013) 0.17
    0.17005977 = sum of:
      0.17005977 = product of:
        0.7085824 = sum of:
          0.09045668 = weight(abstract_txt:indicators in 1616) [ClassicSimilarity], result of:
            0.09045668 = score(doc=1616,freq=4.0), product of:
              0.09603664 = queryWeight, product of:
                1.0395441 = boost
                6.0281444 = idf(docFreq=290, maxDocs=44421)
                0.01532535 = queryNorm
              0.9418976 = fieldWeight in 1616, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.0281444 = idf(docFreq=290, maxDocs=44421)
                0.078125 = fieldNorm(doc=1616)
          0.04845173 = weight(abstract_txt:bibliometric in 1616) [ClassicSimilarity], result of:
            0.04845173 = score(doc=1616,freq=1.0), product of:
              0.10054707 = queryWeight, product of:
                1.0636755 = boost
                6.168078 = idf(docFreq=252, maxDocs=44421)
                0.01532535 = queryNorm
              0.48188108 = fieldWeight in 1616, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.168078 = idf(docFreq=252, maxDocs=44421)
                0.078125 = fieldNorm(doc=1616)
          0.023575986 = weight(abstract_txt:science in 1616) [ClassicSimilarity], result of:
            0.023575986 = score(doc=1616,freq=1.0), product of:
              0.078370586 = queryWeight, product of:
                1.3280548 = boost
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.01532535 = queryNorm
              0.30082697 = fieldWeight in 1616, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.850585 = idf(docFreq=2567, maxDocs=44421)
                0.078125 = fieldNorm(doc=1616)
          0.078506045 = weight(abstract_txt:fields in 1616) [ClassicSimilarity], result of:
            0.078506045 = score(doc=1616,freq=1.0), product of:
              0.20005022 = queryWeight, product of:
                2.5986907 = boost
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.01532535 = queryNorm
              0.39243168 = fieldWeight in 1616, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.0231256 = idf(docFreq=794, maxDocs=44421)
                0.078125 = fieldNorm(doc=1616)
          0.26270607 = weight(abstract_txt:distributions in 1616) [ClassicSimilarity], result of:
            0.26270607 = score(doc=1616,freq=1.0), product of:
              0.4926025 = queryWeight, product of:
                4.708719 = boost
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.01532535 = queryNorm
              0.53330237 = fieldWeight in 1616, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.82627 = idf(docFreq=130, maxDocs=44421)
                0.078125 = fieldNorm(doc=1616)
          0.20488584 = weight(abstract_txt:citation in 1616) [ClassicSimilarity], result of:
            0.20488584 = score(doc=1616,freq=2.0), product of:
              0.37920868 = queryWeight, product of:
                5.0598683 = boost
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.01532535 = queryNorm
              0.5402984 = fieldWeight in 1616, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.890223 = idf(docFreq=907, maxDocs=44421)
                0.078125 = fieldNorm(doc=1616)
        0.24 = coord(6/25)