Document (#38293)

Author
Crespo, J.A.
Herranz, N.
Li, Y.
Ruiz-Castillo, J.
Title
¬The effect on citation inequality of differences in citation practices at the web of science subject category level
Source
Journal of the Association for Information Science and Technology. 65(2014) no.6, S.1244-1256
Year
2014
Abstract
This article studies the impact of differences in citation practices at the subfield, or Web of Science subject category level, using the model introduced in Crespo, Li, and Ruiz-Castillo (2013a), according to which the number of citations received by an article depends on its underlying scientific influence and the field to which it belongs. We use the same Thomson Reuters data set of about 4.4 million articles used in Crespo et al. (2013a) to analyze 22 broad fields. The main results are the following: First, when the classification system goes from 22 fields to 219 subfields the effect on citation inequality of differences in citation practices increases from ?14% at the field level to 18% at the subfield level. Second, we estimate a set of exchange rates (ERs) over a wide [660, 978] citation quantile interval to express the citation counts of articles into the equivalent counts in the all-sciences case. In the fractional case, for example, we find that in 187 of 219 subfields the ERs are reliable in the sense that the coefficient of variation is smaller than or equal to 0.10. Third, in the fractional case the normalization of the raw data using the ERs (or subfield mean citations) as normalization factors reduces the importance of the differences in citation practices from 18% to 3.8% (3.4%) of overall citation inequality. Fourth, the results in the fractional case are essentially replicated when we adopt a multiplicative approach.
Theme
Informetrie
Object
Web of Science

Similar documents (author)

  1. Castillo, J. Ruiz -> Ruiz-Castillo, J.: 6.46
    6.457753 = sum of:
      6.457753 = sum of:
        2.9691498 = weight(author_txt:ruiz in 230) [ClassicSimilarity], result of:
          2.9691498 = score(doc=230,freq=2.0), product of:
            0.6681797 = queryWeight, product of:
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.07974448 = queryNorm
            4.4436398 = fieldWeight in 230, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.375 = fieldNorm(doc=230)
        3.4886036 = weight(author_txt:castillo in 230) [ClassicSimilarity], result of:
          3.4886036 = score(doc=230,freq=2.0), product of:
            0.74399996 = queryWeight, product of:
              1.0552123 = boost
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.07974448 = queryNorm
            4.6889834 = fieldWeight in 230, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.375 = fieldNorm(doc=230)
    
  2. Castillo, J. Ruiz- => Ruiz-Castillo, J.: 6.46
    6.457753 = sum of:
      6.457753 = sum of:
        2.9691498 = weight(author_txt:ruiz in 3888) [ClassicSimilarity], result of:
          2.9691498 = score(doc=3888,freq=2.0), product of:
            0.6681797 = queryWeight, product of:
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.07974448 = queryNorm
            4.4436398 = fieldWeight in 3888, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.375 = fieldNorm(doc=3888)
        3.4886036 = weight(author_txt:castillo in 3888) [ClassicSimilarity], result of:
          3.4886036 = score(doc=3888,freq=2.0), product of:
            0.74399996 = queryWeight, product of:
              1.0552123 = boost
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.07974448 = queryNorm
            4.6889834 = fieldWeight in 3888, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.375 = fieldNorm(doc=3888)
    
  3. Albarrán, P.; Ruiz-Castillo, J.: References made and citations received by scientific articles (2011) 5.33
    5.3273745 = sum of:
      5.3273745 = sum of:
        2.4494238 = weight(author_txt:ruiz in 650) [ClassicSimilarity], result of:
          2.4494238 = score(doc=650,freq=1.0), product of:
            0.6681797 = queryWeight, product of:
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.07974448 = queryNorm
            3.665816 = fieldWeight in 650, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.4375 = fieldNorm(doc=650)
        2.877951 = weight(author_txt:castillo in 650) [ClassicSimilarity], result of:
          2.877951 = score(doc=650,freq=1.0), product of:
            0.74399996 = queryWeight, product of:
              1.0552123 = boost
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.07974448 = queryNorm
            3.868214 = fieldWeight in 650, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.4375 = fieldNorm(doc=650)
    
  4. Herranz, N.; Ruiz-Castillo, J.: Multiplicative and fractional strategies when journals are assigned to several subfields (2012) 5.33
    5.3273745 = sum of:
      5.3273745 = sum of:
        2.4494238 = weight(author_txt:ruiz in 1949) [ClassicSimilarity], result of:
          2.4494238 = score(doc=1949,freq=1.0), product of:
            0.6681797 = queryWeight, product of:
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.07974448 = queryNorm
            3.665816 = fieldWeight in 1949, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.4375 = fieldNorm(doc=1949)
        2.877951 = weight(author_txt:castillo in 1949) [ClassicSimilarity], result of:
          2.877951 = score(doc=1949,freq=1.0), product of:
            0.74399996 = queryWeight, product of:
              1.0552123 = boost
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.07974448 = queryNorm
            3.868214 = fieldWeight in 1949, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.4375 = fieldNorm(doc=1949)
    
  5. Perianes-Rodriguez, A.; Ruiz-Castillo, J.: University citation distributions (2016) 4.57
    4.5663214 = sum of:
      4.5663214 = sum of:
        2.0995061 = weight(author_txt:ruiz in 4617) [ClassicSimilarity], result of:
          2.0995061 = score(doc=4617,freq=1.0), product of:
            0.6681797 = queryWeight, product of:
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.07974448 = queryNorm
            3.142128 = fieldWeight in 4617, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.379008 = idf(docFreq=26, maxDocs=43254)
              0.375 = fieldNorm(doc=4617)
        2.466815 = weight(author_txt:castillo in 4617) [ClassicSimilarity], result of:
          2.466815 = score(doc=4617,freq=1.0), product of:
            0.74399996 = queryWeight, product of:
              1.0552123 = boost
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.07974448 = queryNorm
            3.3156118 = fieldWeight in 4617, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.841632 = idf(docFreq=16, maxDocs=43254)
              0.375 = fieldNorm(doc=4617)
    

Similar documents (content)

  1. Rafols, I.; Leydesdorff, L.: Content-based and algorithmic classifications of journals : perspectives on the dynamics of scientific communication and indexer effects (2009) 0.39
    0.3947835 = sum of:
      0.3947835 = product of:
        0.8972352 = sum of:
          0.027184246 = weight(abstract_txt:science in 96) [ClassicSimilarity], result of:
            0.027184246 = score(doc=96,freq=4.0), product of:
              0.055876635 = queryWeight, product of:
                1.0053023 = boost
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.014280931 = queryNorm
              0.4865047 = fieldWeight in 96, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.013782499 = weight(abstract_txt:subject in 96) [ClassicSimilarity], result of:
            0.013782499 = score(doc=96,freq=1.0), product of:
              0.056397177 = queryWeight, product of:
                1.0099741 = boost
                3.9101245 = idf(docFreq=2355, maxDocs=43254)
                0.014280931 = queryNorm
              0.24438278 = fieldWeight in 96, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9101245 = idf(docFreq=2355, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.01659779 = weight(abstract_txt:when in 96) [ClassicSimilarity], result of:
            0.01659779 = score(doc=96,freq=1.0), product of:
              0.06383696 = queryWeight, product of:
                1.0745279 = boost
                4.160045 = idf(docFreq=1834, maxDocs=43254)
                0.014280931 = queryNorm
              0.26000282 = fieldWeight in 96, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.160045 = idf(docFreq=1834, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.02119418 = weight(abstract_txt:field in 96) [ClassicSimilarity], result of:
            0.02119418 = score(doc=96,freq=1.0), product of:
              0.0751363 = queryWeight, product of:
                1.1657528 = boost
                4.513223 = idf(docFreq=1288, maxDocs=43254)
                0.014280931 = queryNorm
              0.28207645 = fieldWeight in 96, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.513223 = idf(docFreq=1288, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.061225623 = weight(abstract_txt:citations in 96) [ClassicSimilarity], result of:
            0.061225623 = score(doc=96,freq=3.0), product of:
              0.105670504 = queryWeight, product of:
                1.3824787 = boost
                5.3522797 = idf(docFreq=556, maxDocs=43254)
                0.014280931 = queryNorm
              0.57940125 = fieldWeight in 96, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.3522797 = idf(docFreq=556, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.13994691 = weight(abstract_txt:category in 96) [ClassicSimilarity], result of:
            0.13994691 = score(doc=96,freq=6.0), product of:
              0.14553379 = queryWeight, product of:
                1.6224207 = boost
                6.2812176 = idf(docFreq=219, maxDocs=43254)
                0.014280931 = queryNorm
              0.96161115 = fieldWeight in 96, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                6.2812176 = idf(docFreq=219, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.060257062 = weight(abstract_txt:level in 96) [ClassicSimilarity], result of:
            0.060257062 = score(doc=96,freq=2.0), product of:
              0.15079167 = queryWeight, product of:
                2.3355289 = boost
                4.5210114 = idf(docFreq=1278, maxDocs=43254)
                0.014280931 = queryNorm
              0.3996047 = fieldWeight in 96, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5210114 = idf(docFreq=1278, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.07304236 = weight(abstract_txt:case in 96) [ClassicSimilarity], result of:
            0.07304236 = score(doc=96,freq=2.0), product of:
              0.1714307 = queryWeight, product of:
                2.490238 = boost
                4.8204904 = idf(docFreq=947, maxDocs=43254)
                0.014280931 = queryNorm
              0.42607516 = fieldWeight in 96, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8204904 = idf(docFreq=947, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.056914713 = weight(abstract_txt:differences in 96) [ClassicSimilarity], result of:
            0.056914713 = score(doc=96,freq=1.0), product of:
              0.18289356 = queryWeight, product of:
                2.572147 = boost
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.014280931 = queryNorm
              0.31119037 = fieldWeight in 96, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.1813373 = weight(abstract_txt:subfield in 96) [ClassicSimilarity], result of:
            0.1813373 = score(doc=96,freq=1.0), product of:
              0.3597995 = queryWeight, product of:
                3.124334 = boost
                8.063927 = idf(docFreq=36, maxDocs=43254)
                0.014280931 = queryNorm
              0.5039954 = fieldWeight in 96, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.063927 = idf(docFreq=36, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
          0.2457525 = weight(abstract_txt:citation in 96) [ClassicSimilarity], result of:
            0.2457525 = score(doc=96,freq=4.0), product of:
              0.4003331 = queryWeight, product of:
                5.708192 = boost
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.014280931 = queryNorm
              0.61387 = fieldWeight in 96, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.0625 = fieldNorm(doc=96)
        0.44 = coord(11/25)
    
  2. 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) 0.36
    0.3618298 = sum of:
      0.3618298 = product of:
        1.0050827 = sum of:
          0.019222165 = weight(abstract_txt:science in 1997) [ClassicSimilarity], result of:
            0.019222165 = score(doc=1997,freq=2.0), product of:
              0.055876635 = queryWeight, product of:
                1.0053023 = boost
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.014280931 = queryNorm
              0.34401077 = fieldWeight in 1997, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.036709394 = weight(abstract_txt:field in 1997) [ClassicSimilarity], result of:
            0.036709394 = score(doc=1997,freq=3.0), product of:
              0.0751363 = queryWeight, product of:
                1.1657528 = boost
                4.513223 = idf(docFreq=1288, maxDocs=43254)
                0.014280931 = queryNorm
              0.48857072 = fieldWeight in 1997, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.513223 = idf(docFreq=1288, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.042209327 = weight(abstract_txt:fields in 1997) [ClassicSimilarity], result of:
            0.042209327 = score(doc=1997,freq=2.0), product of:
              0.09439906 = queryWeight, product of:
                1.3066684 = boost
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.014280931 = queryNorm
              0.44713718 = fieldWeight in 1997, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.06864735 = weight(abstract_txt:counts in 1997) [ClassicSimilarity], result of:
            0.06864735 = score(doc=1997,freq=1.0), product of:
              0.16448307 = queryWeight, product of:
                1.7248136 = boost
                6.677633 = idf(docFreq=147, maxDocs=43254)
                0.014280931 = queryNorm
              0.41735205 = fieldWeight in 1997, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.677633 = idf(docFreq=147, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.100426845 = weight(abstract_txt:normalization in 1997) [ClassicSimilarity], result of:
            0.100426845 = score(doc=1997,freq=1.0), product of:
              0.2119688 = queryWeight, product of:
                1.9580218 = boost
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.014280931 = queryNorm
              0.4737813 = fieldWeight in 1997, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.07304236 = weight(abstract_txt:case in 1997) [ClassicSimilarity], result of:
            0.07304236 = score(doc=1997,freq=2.0), product of:
              0.1714307 = queryWeight, product of:
                2.490238 = boost
                4.8204904 = idf(docFreq=947, maxDocs=43254)
                0.014280931 = queryNorm
              0.42607516 = fieldWeight in 1997, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8204904 = idf(docFreq=947, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.056914713 = weight(abstract_txt:differences in 1997) [ClassicSimilarity], result of:
            0.056914713 = score(doc=1997,freq=1.0), product of:
              0.18289356 = queryWeight, product of:
                2.572147 = boost
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.014280931 = queryNorm
              0.31119037 = fieldWeight in 1997, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.3621581 = weight(abstract_txt:fractional in 1997) [ClassicSimilarity], result of:
            0.3621581 = score(doc=1997,freq=3.0), product of:
              0.3956345 = queryWeight, product of:
                3.2762291 = boost
                8.455969 = idf(docFreq=24, maxDocs=43254)
                0.014280931 = queryNorm
              0.9153855 = fieldWeight in 1997, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.455969 = idf(docFreq=24, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
          0.2457525 = weight(abstract_txt:citation in 1997) [ClassicSimilarity], result of:
            0.2457525 = score(doc=1997,freq=4.0), product of:
              0.4003331 = queryWeight, product of:
                5.708192 = boost
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.014280931 = queryNorm
              0.61387 = fieldWeight in 1997, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.0625 = fieldNorm(doc=1997)
        0.36 = coord(9/25)
    
  3. 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) 0.36
    0.36100686 = sum of:
      0.36100686 = product of:
        1.1281464 = sum of:
          0.028833244 = weight(abstract_txt:science in 931) [ClassicSimilarity], result of:
            0.028833244 = score(doc=931,freq=2.0), product of:
              0.055876635 = queryWeight, product of:
                1.0053023 = boost
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.014280931 = queryNorm
              0.5160161 = fieldWeight in 931, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.024896685 = weight(abstract_txt:when in 931) [ClassicSimilarity], result of:
            0.024896685 = score(doc=931,freq=1.0), product of:
              0.06383696 = queryWeight, product of:
                1.0745279 = boost
                4.160045 = idf(docFreq=1834, maxDocs=43254)
                0.014280931 = queryNorm
              0.39000422 = fieldWeight in 931, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.160045 = idf(docFreq=1834, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.063314 = weight(abstract_txt:fields in 931) [ClassicSimilarity], result of:
            0.063314 = score(doc=931,freq=2.0), product of:
              0.09439906 = queryWeight, product of:
                1.3066684 = boost
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.014280931 = queryNorm
              0.6707058 = fieldWeight in 931, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.053022947 = weight(abstract_txt:citations in 931) [ClassicSimilarity], result of:
            0.053022947 = score(doc=931,freq=1.0), product of:
              0.105670504 = queryWeight, product of:
                1.3824787 = boost
                5.3522797 = idf(docFreq=556, maxDocs=43254)
                0.014280931 = queryNorm
              0.5017762 = fieldWeight in 931, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3522797 = idf(docFreq=556, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.2130375 = weight(abstract_txt:normalization in 931) [ClassicSimilarity], result of:
            0.2130375 = score(doc=931,freq=2.0), product of:
              0.2119688 = queryWeight, product of:
                1.9580218 = boost
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.014280931 = queryNorm
              1.0050418 = fieldWeight in 931, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.17074414 = weight(abstract_txt:differences in 931) [ClassicSimilarity], result of:
            0.17074414 = score(doc=931,freq=4.0), product of:
              0.18289356 = queryWeight, product of:
                2.572147 = boost
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.014280931 = queryNorm
              0.9335711 = fieldWeight in 931, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.3136381 = weight(abstract_txt:fractional in 931) [ClassicSimilarity], result of:
            0.3136381 = score(doc=931,freq=1.0), product of:
              0.3956345 = queryWeight, product of:
                3.2762291 = boost
                8.455969 = idf(docFreq=24, maxDocs=43254)
                0.014280931 = queryNorm
              0.7927471 = fieldWeight in 931, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.455969 = idf(docFreq=24, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
          0.26065987 = weight(abstract_txt:citation in 931) [ClassicSimilarity], result of:
            0.26065987 = score(doc=931,freq=2.0), product of:
              0.4003331 = queryWeight, product of:
                5.708192 = boost
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.014280931 = queryNorm
              0.6511075 = fieldWeight in 931, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.09375 = fieldNorm(doc=931)
        0.32 = coord(8/25)
    
  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) 0.34
    0.335524 = sum of:
      0.335524 = product of:
        0.7625545 = sum of:
          0.011893108 = weight(abstract_txt:science in 52) [ClassicSimilarity], result of:
            0.011893108 = score(doc=52,freq=1.0), product of:
              0.055876635 = queryWeight, product of:
                1.0053023 = boost
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.014280931 = queryNorm
              0.2128458 = fieldWeight in 52, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.0065052593 = weight(abstract_txt:from in 52) [ClassicSimilarity], result of:
            0.0065052593 = score(doc=52,freq=1.0), product of:
              0.04277994 = queryWeight, product of:
                1.0773263 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.014280931 = queryNorm
              0.15206331 = fieldWeight in 52, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.041467674 = weight(abstract_txt:field in 52) [ClassicSimilarity], result of:
            0.041467674 = score(doc=52,freq=5.0), product of:
              0.0751363 = queryWeight, product of:
                1.1657528 = boost
                4.513223 = idf(docFreq=1288, maxDocs=43254)
                0.014280931 = queryNorm
              0.5518994 = fieldWeight in 52, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.513223 = idf(docFreq=1288, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.05223138 = weight(abstract_txt:fields in 52) [ClassicSimilarity], result of:
            0.05223138 = score(doc=52,freq=4.0), product of:
              0.09439906 = queryWeight, product of:
                1.3066684 = boost
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.014280931 = queryNorm
              0.553304 = fieldWeight in 52, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.0691617 = weight(abstract_txt:citations in 52) [ClassicSimilarity], result of:
            0.0691617 = score(doc=52,freq=5.0), product of:
              0.105670504 = queryWeight, product of:
                1.3824787 = boost
                5.3522797 = idf(docFreq=556, maxDocs=43254)
                0.014280931 = queryNorm
              0.65450335 = fieldWeight in 52, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.3522797 = idf(docFreq=556, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.06006643 = weight(abstract_txt:counts in 52) [ClassicSimilarity], result of:
            0.06006643 = score(doc=52,freq=1.0), product of:
              0.16448307 = queryWeight, product of:
                1.7248136 = boost
                6.677633 = idf(docFreq=147, maxDocs=43254)
                0.014280931 = queryNorm
              0.36518306 = fieldWeight in 52, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.677633 = idf(docFreq=147, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.19649112 = weight(abstract_txt:normalization in 52) [ClassicSimilarity], result of:
            0.19649112 = score(doc=52,freq=5.0), product of:
              0.2119688 = queryWeight, product of:
                1.9580218 = boost
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.014280931 = queryNorm
              0.92698133 = fieldWeight in 52, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.04519266 = weight(abstract_txt:case in 52) [ClassicSimilarity], result of:
            0.04519266 = score(doc=52,freq=1.0), product of:
              0.1714307 = queryWeight, product of:
                2.490238 = boost
                4.8204904 = idf(docFreq=947, maxDocs=43254)
                0.014280931 = queryNorm
              0.26362056 = fieldWeight in 52, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.8204904 = idf(docFreq=947, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.070428364 = weight(abstract_txt:differences in 52) [ClassicSimilarity], result of:
            0.070428364 = score(doc=52,freq=2.0), product of:
              0.18289356 = queryWeight, product of:
                2.572147 = boost
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.014280931 = queryNorm
              0.38507843 = fieldWeight in 52, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.057065222 = weight(abstract_txt:practices in 52) [ClassicSimilarity], result of:
            0.057065222 = score(doc=52,freq=1.0), product of:
              0.2002739 = queryWeight, product of:
                2.6915889 = boost
                5.2102566 = idf(docFreq=641, maxDocs=43254)
                0.014280931 = queryNorm
              0.2849359 = fieldWeight in 52, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2102566 = idf(docFreq=641, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
          0.1520516 = weight(abstract_txt:citation in 52) [ClassicSimilarity], result of:
            0.1520516 = score(doc=52,freq=2.0), product of:
              0.4003331 = queryWeight, product of:
                5.708192 = boost
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.014280931 = queryNorm
              0.37981272 = fieldWeight in 52, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.0546875 = fieldNorm(doc=52)
        0.44 = coord(11/25)
    
  5. 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) 0.32
    0.31594756 = sum of:
      0.31594756 = product of:
        0.98733616 = sum of:
          0.027184246 = weight(abstract_txt:science in 651) [ClassicSimilarity], result of:
            0.027184246 = score(doc=651,freq=4.0), product of:
              0.055876635 = queryWeight, product of:
                1.0053023 = boost
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.014280931 = queryNorm
              0.4865047 = fieldWeight in 651, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.8920376 = idf(docFreq=2398, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.0074345823 = weight(abstract_txt:from in 651) [ClassicSimilarity], result of:
            0.0074345823 = score(doc=651,freq=1.0), product of:
              0.04277994 = queryWeight, product of:
                1.0773263 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.014280931 = queryNorm
              0.17378664 = fieldWeight in 651, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.059693005 = weight(abstract_txt:fields in 651) [ClassicSimilarity], result of:
            0.059693005 = score(doc=651,freq=4.0), product of:
              0.09439906 = queryWeight, product of:
                1.3066684 = boost
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.014280931 = queryNorm
              0.63234746 = fieldWeight in 651, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.0587797 = idf(docFreq=746, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.06864735 = weight(abstract_txt:counts in 651) [ClassicSimilarity], result of:
            0.06864735 = score(doc=651,freq=1.0), product of:
              0.16448307 = queryWeight, product of:
                1.7248136 = boost
                6.677633 = idf(docFreq=147, maxDocs=43254)
                0.014280931 = queryNorm
              0.41735205 = fieldWeight in 651, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.677633 = idf(docFreq=147, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.100426845 = weight(abstract_txt:normalization in 651) [ClassicSimilarity], result of:
            0.100426845 = score(doc=651,freq=1.0), product of:
              0.2119688 = queryWeight, product of:
                1.9580218 = boost
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.014280931 = queryNorm
              0.4737813 = fieldWeight in 651, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.5805006 = idf(docFreq=59, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.12726517 = weight(abstract_txt:differences in 651) [ClassicSimilarity], result of:
            0.12726517 = score(doc=651,freq=5.0), product of:
              0.18289356 = queryWeight, product of:
                2.572147 = boost
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.014280931 = queryNorm
              0.6958428 = fieldWeight in 651, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.979046 = idf(docFreq=808, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.29570082 = weight(abstract_txt:fractional in 651) [ClassicSimilarity], result of:
            0.29570082 = score(doc=651,freq=2.0), product of:
              0.3956345 = queryWeight, product of:
                3.2762291 = boost
                8.455969 = idf(docFreq=24, maxDocs=43254)
                0.014280931 = queryNorm
              0.7474091 = fieldWeight in 651, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.455969 = idf(docFreq=24, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
          0.3009841 = weight(abstract_txt:citation in 651) [ClassicSimilarity], result of:
            0.3009841 = score(doc=651,freq=6.0), product of:
              0.4003331 = queryWeight, product of:
                5.708192 = boost
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.014280931 = queryNorm
              0.7518342 = fieldWeight in 651, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.91096 = idf(docFreq=865, maxDocs=43254)
                0.0625 = fieldNorm(doc=651)
        0.32 = coord(8/25)