Document (#38666)

Author
Albarrán, P.
Perianes-Rodríguez, A.
Ruiz-Castillo, J.
Title
Differences in citation impact across countries
Source
Journal of the Association for Information Science and Technology. 66(2015) no.3, S.512-525
Year
2015
Abstract
Using a large data set, indexed by Thomson Reuters, consisting of 4.4 million articles published in 1998-2003 with a 5-year citation window for each year, this article studies country citation distributions for a partitioning of the world into 36 countries and two geographical areas in eight broad scientific fields and the all-sciences case. The two key findings are the following. First, country citation distributions are highly skewed and very similar to each other in all fields. Second, to a large extent, differences in country citation distributions can be accounted for by scale factors. The Empirical situation described in the article helps to understand why international comparisons of citation impact according to (a) mean citations and (b) the percentage of articles in each country belonging to the top 10% of the most cited articles are so similar to each other.
Content
Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23219/abstract.
Theme
Informetrie

Similar documents (author)

  1. Costas, R.; Perianes-Rodríguez, A.; Ruiz-Castillo, J.: On the quest for currencies of science : field "exchange rates" for citations and Mendeley readership (2017) 5.41
    5.411082 = sum of:
      5.411082 = sum of:
        0.951188 = weight(author_txt:rodríguez in 4051) [ClassicSimilarity], result of:
          0.951188 = score(doc=4051,freq=1.0), product of:
            0.3929695 = queryWeight, product of:
              7.7456436 = idf(docFreq=51, maxDocs=44218)
              0.05073426 = queryNorm
            2.4205136 = fieldWeight in 4051, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.7456436 = idf(docFreq=51, maxDocs=44218)
              0.3125 = fieldNorm(doc=4051)
        1.2136533 = weight(author_txt:ruiz in 4051) [ClassicSimilarity], result of:
          1.2136533 = score(doc=4051,freq=1.0), product of:
            0.4622863 = queryWeight, product of:
              1.0846162 = boost
              8.401051 = idf(docFreq=26, maxDocs=44218)
              0.05073426 = queryNorm
            2.6253283 = fieldWeight in 4051, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.401051 = idf(docFreq=26, maxDocs=44218)
              0.3125 = fieldNorm(doc=4051)
        1.4253948 = weight(author_txt:castillo in 4051) [ClassicSimilarity], result of:
          1.4253948 = score(doc=4051,freq=1.0), product of:
            0.5146019 = queryWeight, product of:
              1.1443431 = boost
              8.863674 = idf(docFreq=16, maxDocs=44218)
              0.05073426 = queryNorm
            2.7698982 = fieldWeight in 4051, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.863674 = idf(docFreq=16, maxDocs=44218)
              0.3125 = fieldNorm(doc=4051)
        1.8208455 = weight(author_txt:perianes in 4051) [ClassicSimilarity], result of:
          1.8208455 = score(doc=4051,freq=1.0), product of:
            0.6058475 = queryWeight, product of:
              1.2416587 = boost
              9.617446 = idf(docFreq=7, maxDocs=44218)
              0.05073426 = queryNorm
            3.005452 = fieldWeight in 4051, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.617446 = idf(docFreq=7, maxDocs=44218)
              0.3125 = fieldNorm(doc=4051)
    
  2. Perianes-Rodriguez, A.; Ruiz-Castillo, J.: University citation distributions (2016) 4.01
    4.0139046 = sum of:
      4.0139046 = product of:
        5.3518724 = sum of:
          1.456384 = weight(author_txt:ruiz in 3152) [ClassicSimilarity], result of:
            1.456384 = score(doc=3152,freq=1.0), product of:
              0.4622863 = queryWeight, product of:
                1.0846162 = boost
                8.401051 = idf(docFreq=26, maxDocs=44218)
                0.05073426 = queryNorm
              3.150394 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.401051 = idf(docFreq=26, maxDocs=44218)
                0.375 = fieldNorm(doc=3152)
          1.7104738 = weight(author_txt:castillo in 3152) [ClassicSimilarity], result of:
            1.7104738 = score(doc=3152,freq=1.0), product of:
              0.5146019 = queryWeight, product of:
                1.1443431 = boost
                8.863674 = idf(docFreq=16, maxDocs=44218)
                0.05073426 = queryNorm
              3.3238778 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.863674 = idf(docFreq=16, maxDocs=44218)
                0.375 = fieldNorm(doc=3152)
          2.1850145 = weight(author_txt:perianes in 3152) [ClassicSimilarity], result of:
            2.1850145 = score(doc=3152,freq=1.0), product of:
              0.6058475 = queryWeight, product of:
                1.2416587 = boost
                9.617446 = idf(docFreq=7, maxDocs=44218)
                0.05073426 = queryNorm
              3.606542 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.617446 = idf(docFreq=7, maxDocs=44218)
                0.375 = fieldNorm(doc=3152)
        0.75 = coord(3/4)
    
  3. Perianes-Rodriguez, A.; Ruiz-Castillo, J.: ¬The impact of classification systems in the evaluation of the research performance of the Leiden Ranking universities (2018) 4.01
    4.0139046 = sum of:
      4.0139046 = product of:
        5.3518724 = sum of:
          1.456384 = weight(author_txt:ruiz in 4374) [ClassicSimilarity], result of:
            1.456384 = score(doc=4374,freq=1.0), product of:
              0.4622863 = queryWeight, product of:
                1.0846162 = boost
                8.401051 = idf(docFreq=26, maxDocs=44218)
                0.05073426 = queryNorm
              3.150394 = fieldWeight in 4374, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.401051 = idf(docFreq=26, maxDocs=44218)
                0.375 = fieldNorm(doc=4374)
          1.7104738 = weight(author_txt:castillo in 4374) [ClassicSimilarity], result of:
            1.7104738 = score(doc=4374,freq=1.0), product of:
              0.5146019 = queryWeight, product of:
                1.1443431 = boost
                8.863674 = idf(docFreq=16, maxDocs=44218)
                0.05073426 = queryNorm
              3.3238778 = fieldWeight in 4374, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.863674 = idf(docFreq=16, maxDocs=44218)
                0.375 = fieldNorm(doc=4374)
          2.1850145 = weight(author_txt:perianes in 4374) [ClassicSimilarity], result of:
            2.1850145 = score(doc=4374,freq=1.0), product of:
              0.6058475 = queryWeight, product of:
                1.2416587 = boost
                9.617446 = idf(docFreq=7, maxDocs=44218)
                0.05073426 = queryNorm
              3.606542 = fieldWeight in 4374, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.617446 = idf(docFreq=7, maxDocs=44218)
                0.375 = fieldNorm(doc=4374)
        0.75 = coord(3/4)
    
  4. Rodríguez, A. Perianes- => Perianes-Rodríguez, A.: 2.35
    2.3521483 = sum of:
      2.3521483 = product of:
        4.7042966 = sum of:
          1.6142194 = weight(author_txt:rodríguez in 2816) [ClassicSimilarity], result of:
            1.6142194 = score(doc=2816,freq=2.0), product of:
              0.3929695 = queryWeight, product of:
                7.7456436 = idf(docFreq=51, maxDocs=44218)
                0.05073426 = queryNorm
              4.1077476 = fieldWeight in 2816, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.7456436 = idf(docFreq=51, maxDocs=44218)
                0.375 = fieldNorm(doc=2816)
          3.0900772 = weight(author_txt:perianes in 2816) [ClassicSimilarity], result of:
            3.0900772 = score(doc=2816,freq=2.0), product of:
              0.6058475 = queryWeight, product of:
                1.2416587 = boost
                9.617446 = idf(docFreq=7, maxDocs=44218)
                0.05073426 = queryNorm
              5.100421 = fieldWeight in 2816, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                9.617446 = idf(docFreq=7, maxDocs=44218)
                0.375 = fieldNorm(doc=2816)
        0.5 = coord(2/4)
    
  5. Castillo, J. Ruiz -> Ruiz-Castillo, J.: 2.24
    2.2393067 = sum of:
      2.2393067 = product of:
        4.4786134 = sum of:
          2.059638 = weight(author_txt:ruiz in 8230) [ClassicSimilarity], result of:
            2.059638 = score(doc=8230,freq=2.0), product of:
              0.4622863 = queryWeight, product of:
                1.0846162 = boost
                8.401051 = idf(docFreq=26, maxDocs=44218)
                0.05073426 = queryNorm
              4.45533 = fieldWeight in 8230, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.401051 = idf(docFreq=26, maxDocs=44218)
                0.375 = fieldNorm(doc=8230)
          2.4189754 = weight(author_txt:castillo in 8230) [ClassicSimilarity], result of:
            2.4189754 = score(doc=8230,freq=2.0), product of:
              0.5146019 = queryWeight, product of:
                1.1443431 = boost
                8.863674 = idf(docFreq=16, maxDocs=44218)
                0.05073426 = queryNorm
              4.700673 = fieldWeight in 8230, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.863674 = idf(docFreq=16, maxDocs=44218)
                0.375 = fieldNorm(doc=8230)
        0.5 = coord(2/4)
    

Similar documents (content)

  1. Albarrán, P.; Ruiz-Castillo, J.: References made and citations received by scientific articles (2011) 0.53
    0.5267544 = sum of:
      0.5267544 = product of:
        1.316886 = sum of:
          0.018387828 = weight(abstract_txt:other in 4185) [ClassicSimilarity], result of:
            0.018387828 = score(doc=4185,freq=1.0), product of:
              0.066855416 = queryWeight, product of:
                1.0355849 = boost
                3.5204957 = idf(docFreq=3555, maxDocs=44218)
                0.018337794 = queryNorm
              0.27503872 = fieldWeight in 4185, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5204957 = idf(docFreq=3555, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.0774833 = weight(abstract_txt:percentage in 4185) [ClassicSimilarity], result of:
            0.0774833 = score(doc=4185,freq=1.0), product of:
              0.13843472 = queryWeight, product of:
                1.0537193 = boost
                7.1642876 = idf(docFreq=92, maxDocs=44218)
                0.018337794 = queryNorm
              0.55970997 = fieldWeight in 4185, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1642876 = idf(docFreq=92, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.023198595 = weight(abstract_txt:article in 4185) [ClassicSimilarity], result of:
            0.023198595 = score(doc=4185,freq=1.0), product of:
              0.078059204 = queryWeight, product of:
                1.1189984 = boost
                3.8040617 = idf(docFreq=2677, maxDocs=44218)
                0.018337794 = queryNorm
              0.2971923 = fieldWeight in 4185, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8040617 = idf(docFreq=2677, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.096493445 = weight(abstract_txt:window in 4185) [ClassicSimilarity], result of:
            0.096493445 = score(doc=4185,freq=1.0), product of:
              0.16024022 = queryWeight, product of:
                1.133674 = boost
                7.7079034 = idf(docFreq=53, maxDocs=44218)
                0.018337794 = queryNorm
              0.60217994 = fieldWeight in 4185, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7079034 = idf(docFreq=53, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.17440243 = weight(abstract_txt:skewed in 4185) [ClassicSimilarity], result of:
            0.17440243 = score(doc=4185,freq=2.0), product of:
              0.18871135 = queryWeight, product of:
                1.2302728 = boost
                8.364683 = idf(docFreq=27, maxDocs=44218)
                0.018337794 = queryNorm
              0.9241756 = fieldWeight in 4185, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.364683 = idf(docFreq=27, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.07590137 = weight(abstract_txt:fields in 4185) [ClassicSimilarity], result of:
            0.07590137 = score(doc=4185,freq=2.0), product of:
              0.13654403 = queryWeight, product of:
                1.479973 = boost
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.018337794 = queryNorm
              0.55587465 = fieldWeight in 4185, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.07282639 = weight(abstract_txt:year in 4185) [ClassicSimilarity], result of:
            0.07282639 = score(doc=4185,freq=1.0), product of:
              0.16735634 = queryWeight, product of:
                1.63847 = boost
                5.570018 = idf(docFreq=457, maxDocs=44218)
                0.018337794 = queryNorm
              0.43515766 = fieldWeight in 4185, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.570018 = idf(docFreq=457, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.11974082 = weight(abstract_txt:articles in 4185) [ClassicSimilarity], result of:
            0.11974082 = score(doc=4185,freq=3.0), product of:
              0.18504094 = queryWeight, product of:
                2.1100705 = boost
                4.7821565 = idf(docFreq=1006, maxDocs=44218)
                0.018337794 = queryNorm
              0.6471045 = fieldWeight in 4185, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.7821565 = idf(docFreq=1006, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.40134358 = weight(abstract_txt:distributions in 4185) [ClassicSimilarity], result of:
            0.40134358 = score(doc=4185,freq=4.0), product of:
              0.37653407 = queryWeight, product of:
                3.009991 = boost
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.018337794 = queryNorm
              1.0658891 = fieldWeight in 4185, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
          0.25710818 = weight(abstract_txt:citation in 4185) [ClassicSimilarity], result of:
            0.25710818 = score(doc=4185,freq=3.0), product of:
              0.3880255 = queryWeight, product of:
                4.321238 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.018337794 = queryNorm
              0.6626064 = fieldWeight in 4185, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.078125 = fieldNorm(doc=4185)
        0.4 = coord(10/25)
    
  2. Perianes-Rodriguez, A.; Ruiz-Castillo, J.: University citation distributions (2016) 0.42
    0.42029762 = sum of:
      0.42029762 = product of:
        1.1674933 = sum of:
          0.061986636 = weight(abstract_txt:percentage in 3152) [ClassicSimilarity], result of:
            0.061986636 = score(doc=3152,freq=1.0), product of:
              0.13843472 = queryWeight, product of:
                1.0537193 = boost
                7.1642876 = idf(docFreq=92, maxDocs=44218)
                0.018337794 = queryNorm
              0.44776797 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1642876 = idf(docFreq=92, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.098656915 = weight(abstract_txt:skewed in 3152) [ClassicSimilarity], result of:
            0.098656915 = score(doc=3152,freq=1.0), product of:
              0.18871135 = queryWeight, product of:
                1.2302728 = boost
                8.364683 = idf(docFreq=27, maxDocs=44218)
                0.018337794 = queryNorm
              0.5227927 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.364683 = idf(docFreq=27, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.029791046 = weight(abstract_txt:large in 3152) [ClassicSimilarity], result of:
            0.029791046 = score(doc=3152,freq=1.0), product of:
              0.107015535 = queryWeight, product of:
                1.3102098 = boost
                4.454089 = idf(docFreq=1397, maxDocs=44218)
                0.018337794 = queryNorm
              0.27838057 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.454089 = idf(docFreq=1397, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.032555893 = weight(abstract_txt:impact in 3152) [ClassicSimilarity], result of:
            0.032555893 = score(doc=3152,freq=1.0), product of:
              0.11353839 = queryWeight, product of:
                1.3495494 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.018337794 = queryNorm
              0.28673908 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.041225813 = weight(abstract_txt:differences in 3152) [ClassicSimilarity], result of:
            0.041225813 = score(doc=3152,freq=1.0), product of:
              0.13289312 = queryWeight, product of:
                1.4600531 = boost
                4.9634852 = idf(docFreq=839, maxDocs=44218)
                0.018337794 = queryNorm
              0.31021783 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9634852 = idf(docFreq=839, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.047698397 = weight(abstract_txt:similar in 3152) [ClassicSimilarity], result of:
            0.047698397 = score(doc=3152,freq=1.0), product of:
              0.14646219 = queryWeight, product of:
                1.5327812 = boost
                5.2107263 = idf(docFreq=655, maxDocs=44218)
                0.018337794 = queryNorm
              0.3256704 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2107263 = idf(docFreq=655, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.05530592 = weight(abstract_txt:articles in 3152) [ClassicSimilarity], result of:
            0.05530592 = score(doc=3152,freq=1.0), product of:
              0.18504094 = queryWeight, product of:
                2.1100705 = boost
                4.7821565 = idf(docFreq=1006, maxDocs=44218)
                0.018337794 = queryNorm
              0.29888478 = fieldWeight in 3152, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.7821565 = idf(docFreq=1006, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.42474207 = weight(abstract_txt:distributions in 3152) [ClassicSimilarity], result of:
            0.42474207 = score(doc=3152,freq=7.0), product of:
              0.37653407 = queryWeight, product of:
                3.009991 = boost
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.018337794 = queryNorm
              1.1280309 = fieldWeight in 3152, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
          0.37553057 = weight(abstract_txt:citation in 3152) [ClassicSimilarity], result of:
            0.37553057 = score(doc=3152,freq=10.0), product of:
              0.3880255 = queryWeight, product of:
                4.321238 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.018337794 = queryNorm
              0.9677987 = fieldWeight in 3152, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=3152)
        0.36 = coord(9/25)
    
  3. Waltman, L.; Eck, N.J. van; Raan, A.F.J. van: Universality of citation distributions revisited (2012) 0.26
    0.26208445 = sum of:
      0.26208445 = product of:
        1.0920186 = sum of:
          0.04468657 = weight(abstract_txt:large in 4963) [ClassicSimilarity], result of:
            0.04468657 = score(doc=4963,freq=1.0), product of:
              0.107015535 = queryWeight, product of:
                1.3102098 = boost
                4.454089 = idf(docFreq=1397, maxDocs=44218)
                0.018337794 = queryNorm
              0.41757086 = fieldWeight in 4963, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.454089 = idf(docFreq=1397, maxDocs=44218)
                0.09375 = fieldNorm(doc=4963)
          0.04883384 = weight(abstract_txt:impact in 4963) [ClassicSimilarity], result of:
            0.04883384 = score(doc=4963,freq=1.0), product of:
              0.11353839 = queryWeight, product of:
                1.3495494 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.018337794 = queryNorm
              0.4301086 = fieldWeight in 4963, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.09375 = fieldNorm(doc=4963)
          0.11155178 = weight(abstract_txt:fields in 4963) [ClassicSimilarity], result of:
            0.11155178 = score(doc=4963,freq=3.0), product of:
              0.13654403 = queryWeight, product of:
                1.479973 = boost
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.018337794 = queryNorm
              0.8169656 = fieldWeight in 4963, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.09375 = fieldNorm(doc=4963)
          0.0715476 = weight(abstract_txt:similar in 4963) [ClassicSimilarity], result of:
            0.0715476 = score(doc=4963,freq=1.0), product of:
              0.14646219 = queryWeight, product of:
                1.5327812 = boost
                5.2107263 = idf(docFreq=655, maxDocs=44218)
                0.018337794 = queryNorm
              0.4885056 = fieldWeight in 4963, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2107263 = idf(docFreq=655, maxDocs=44218)
                0.09375 = fieldNorm(doc=4963)
          0.41708845 = weight(abstract_txt:distributions in 4963) [ClassicSimilarity], result of:
            0.41708845 = score(doc=4963,freq=3.0), product of:
              0.37653407 = queryWeight, product of:
                3.009991 = boost
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.018337794 = queryNorm
              1.1077044 = fieldWeight in 4963, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.09375 = fieldNorm(doc=4963)
          0.3983103 = weight(abstract_txt:citation in 4963) [ClassicSimilarity], result of:
            0.3983103 = score(doc=4963,freq=5.0), product of:
              0.3880255 = queryWeight, product of:
                4.321238 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.018337794 = queryNorm
              1.0265055 = fieldWeight in 4963, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.09375 = fieldNorm(doc=4963)
        0.24 = coord(6/25)
    
  4. Thelwall, M.; Maflahi, N.: Academic collaboration rates and citation associations vary substantially between countries and fields (2020) 0.26
    0.25806662 = sum of:
      0.25806662 = product of:
        0.80645823 = sum of:
          0.018558877 = weight(abstract_txt:article in 5952) [ClassicSimilarity], result of:
            0.018558877 = score(doc=5952,freq=1.0), product of:
              0.078059204 = queryWeight, product of:
                1.1189984 = boost
                3.8040617 = idf(docFreq=2677, maxDocs=44218)
                0.018337794 = queryNorm
              0.23775385 = fieldWeight in 5952, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8040617 = idf(docFreq=2677, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.07974533 = weight(abstract_txt:impact in 5952) [ClassicSimilarity], result of:
            0.07974533 = score(doc=5952,freq=6.0), product of:
              0.11353839 = queryWeight, product of:
                1.3495494 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.018337794 = queryNorm
              0.70236444 = fieldWeight in 5952, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.058302104 = weight(abstract_txt:differences in 5952) [ClassicSimilarity], result of:
            0.058302104 = score(doc=5952,freq=2.0), product of:
              0.13289312 = queryWeight, product of:
                1.4600531 = boost
                4.9634852 = idf(docFreq=839, maxDocs=44218)
                0.018337794 = queryNorm
              0.43871427 = fieldWeight in 5952, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.9634852 = idf(docFreq=839, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.060721096 = weight(abstract_txt:fields in 5952) [ClassicSimilarity], result of:
            0.060721096 = score(doc=5952,freq=2.0), product of:
              0.13654403 = queryWeight, product of:
                1.479973 = boost
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.018337794 = queryNorm
              0.44469973 = fieldWeight in 5952, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.08418579 = weight(abstract_txt:countries in 5952) [ClassicSimilarity], result of:
            0.08418579 = score(doc=5952,freq=2.0), product of:
              0.16977438 = queryWeight, product of:
                1.6502643 = boost
                5.6101127 = idf(docFreq=439, maxDocs=44218)
                0.018337794 = queryNorm
              0.4958686 = fieldWeight in 5952, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.6101127 = idf(docFreq=439, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.05530592 = weight(abstract_txt:articles in 5952) [ClassicSimilarity], result of:
            0.05530592 = score(doc=5952,freq=1.0), product of:
              0.18504094 = queryWeight, product of:
                2.1100705 = boost
                4.7821565 = idf(docFreq=1006, maxDocs=44218)
                0.018337794 = queryNorm
              0.29888478 = fieldWeight in 5952, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.7821565 = idf(docFreq=1006, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.18409891 = weight(abstract_txt:country in 5952) [ClassicSimilarity], result of:
            0.18409891 = score(doc=5952,freq=1.0), product of:
              0.45404664 = queryWeight, product of:
                3.8166528 = boost
                6.487401 = idf(docFreq=182, maxDocs=44218)
                0.018337794 = queryNorm
              0.40546256 = fieldWeight in 5952, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.487401 = idf(docFreq=182, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
          0.2655402 = weight(abstract_txt:citation in 5952) [ClassicSimilarity], result of:
            0.2655402 = score(doc=5952,freq=5.0), product of:
              0.3880255 = queryWeight, product of:
                4.321238 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.018337794 = queryNorm
              0.684337 = fieldWeight in 5952, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=5952)
        0.32 = coord(8/25)
    
  5. 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) 0.26
    0.25736865 = sum of:
      0.25736865 = product of:
        0.80427706 = sum of:
          0.07719476 = weight(abstract_txt:window in 532) [ClassicSimilarity], result of:
            0.07719476 = score(doc=532,freq=1.0), product of:
              0.16024022 = queryWeight, product of:
                1.133674 = boost
                7.7079034 = idf(docFreq=53, maxDocs=44218)
                0.018337794 = queryNorm
              0.48174396 = fieldWeight in 532, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7079034 = idf(docFreq=53, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.098656915 = weight(abstract_txt:skewed in 532) [ClassicSimilarity], result of:
            0.098656915 = score(doc=532,freq=1.0), product of:
              0.18871135 = queryWeight, product of:
                1.2302728 = boost
                8.364683 = idf(docFreq=27, maxDocs=44218)
                0.018337794 = queryNorm
              0.5227927 = fieldWeight in 532, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.364683 = idf(docFreq=27, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.046040986 = weight(abstract_txt:impact in 532) [ClassicSimilarity], result of:
            0.046040986 = score(doc=532,freq=2.0), product of:
              0.11353839 = queryWeight, product of:
                1.3495494 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.018337794 = queryNorm
              0.40551028 = fieldWeight in 532, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.041225813 = weight(abstract_txt:differences in 532) [ClassicSimilarity], result of:
            0.041225813 = score(doc=532,freq=1.0), product of:
              0.13289312 = queryWeight, product of:
                1.4600531 = boost
                4.9634852 = idf(docFreq=839, maxDocs=44218)
                0.018337794 = queryNorm
              0.31021783 = fieldWeight in 532, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9634852 = idf(docFreq=839, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.060721096 = weight(abstract_txt:fields in 532) [ClassicSimilarity], result of:
            0.060721096 = score(doc=532,freq=2.0), product of:
              0.13654403 = queryWeight, product of:
                1.479973 = boost
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.018337794 = queryNorm
              0.44469973 = fieldWeight in 532, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0312033 = idf(docFreq=784, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.08239365 = weight(abstract_txt:year in 532) [ClassicSimilarity], result of:
            0.08239365 = score(doc=532,freq=2.0), product of:
              0.16735634 = queryWeight, product of:
                1.63847 = boost
                5.570018 = idf(docFreq=457, maxDocs=44218)
                0.018337794 = queryNorm
              0.49232465 = fieldWeight in 532, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.570018 = idf(docFreq=457, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.16053742 = weight(abstract_txt:distributions in 532) [ClassicSimilarity], result of:
            0.16053742 = score(doc=532,freq=1.0), product of:
              0.37653407 = queryWeight, product of:
                3.009991 = boost
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.018337794 = queryNorm
              0.42635563 = fieldWeight in 532, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.82169 = idf(docFreq=130, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
          0.23750637 = weight(abstract_txt:citation in 532) [ClassicSimilarity], result of:
            0.23750637 = score(doc=532,freq=4.0), product of:
              0.3880255 = queryWeight, product of:
                4.321238 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.018337794 = queryNorm
              0.61208963 = fieldWeight in 532, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=532)
        0.32 = coord(8/25)