Document (#30253)

Author
Klavans, R.
Boyack, K.W.
Title
Identifying a better measure of relatedness for mapping science
Source
Journal of the American Society for Information Science and Technology. 57(2006) no.2, S.251-263
Year
2006
Abstract
Measuring the relatedness between bibliometric units (journals, documents, authors, or words) is a central task in bibliometric analysis. Relatedness measures are used for many different tasks, among them the generating of maps, or visual pictures, showing the relationship between all items from these data. Despite the importance of these tasks, there has been little written an how to quantitatively evaluate the accuracy of relatedness measures or the resulting maps. The authors propose a new framework for assessing the performance of relatedness measures and visualization algorithms that contains four factors: accuracy, coverage, scalability, and robustness. This method was applied to 10 measures of journal-journal relatedness to determine the best measure. The 10 relatedness measures were then used as inputs to a visualization algorithm to create an additional 10 measures of journal-journal relatedness based an the distances between pairs of journals in two-dimensional space. This second step determines robustness (i.e., which measure remains best after dimension reduction). Results show that, for low coverage (under 50%), the Pearson correlation is the most accurate raw relatedness measure. However, the best overall measure, both at high coverage, and after dimension reduction, is the cosine index or a modified cosine index. Results also showed that the visualization algorithm increased local accuracy for most measures. Possible reasons for this counterintuitive finding are discussed.
Theme
Informetrie

Similar documents (author)

  1. Klavans, R.; Boyack, K.W.: Toward a consensus map of science (2009) 6.49
    6.4887934 = sum of:
      6.4887934 = sum of:
        3.2019496 = weight(author_txt:boyack in 3736) [ClassicSimilarity], result of:
          3.2019496 = score(doc=3736,freq=1.0), product of:
            0.7009124 = queryWeight, product of:
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.076715484 = queryNorm
            4.5682592 = fieldWeight in 3736, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.5 = fieldNorm(doc=3736)
        3.286844 = weight(author_txt:klavans in 3736) [ClassicSimilarity], result of:
          3.286844 = score(doc=3736,freq=1.0), product of:
            0.71324736 = queryWeight, product of:
              1.0087608 = boost
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.076715484 = queryNorm
            4.6082807 = fieldWeight in 3736, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.5 = fieldNorm(doc=3736)
    
  2. Boyack, K.W.; Klavans, R.: Co-citation analysis, bibliographic coupling, and direct citation : which citation approach represents the research front most accurately? (2010) 6.49
    6.4887934 = sum of:
      6.4887934 = sum of:
        3.2019496 = weight(author_txt:boyack in 111) [ClassicSimilarity], result of:
          3.2019496 = score(doc=111,freq=1.0), product of:
            0.7009124 = queryWeight, product of:
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.076715484 = queryNorm
            4.5682592 = fieldWeight in 111, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.5 = fieldNorm(doc=111)
        3.286844 = weight(author_txt:klavans in 111) [ClassicSimilarity], result of:
          3.286844 = score(doc=111,freq=1.0), product of:
            0.71324736 = queryWeight, product of:
              1.0087608 = boost
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.076715484 = queryNorm
            4.6082807 = fieldWeight in 111, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.5 = fieldNorm(doc=111)
    
  3. Klavans, R.; Boyack, K.W.: Using global mapping to create more accurate document-level maps of research fields (2011) 6.49
    6.4887934 = sum of:
      6.4887934 = sum of:
        3.2019496 = weight(author_txt:boyack in 956) [ClassicSimilarity], result of:
          3.2019496 = score(doc=956,freq=1.0), product of:
            0.7009124 = queryWeight, product of:
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.076715484 = queryNorm
            4.5682592 = fieldWeight in 956, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.5 = fieldNorm(doc=956)
        3.286844 = weight(author_txt:klavans in 956) [ClassicSimilarity], result of:
          3.286844 = score(doc=956,freq=1.0), product of:
            0.71324736 = queryWeight, product of:
              1.0087608 = boost
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.076715484 = queryNorm
            4.6082807 = fieldWeight in 956, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.5 = fieldNorm(doc=956)
    
  4. Boyack, K.W.; Klavans, R.: Creation of a highly detailed, dynamic, global model and map of science (2014) 6.49
    6.4887934 = sum of:
      6.4887934 = sum of:
        3.2019496 = weight(author_txt:boyack in 2230) [ClassicSimilarity], result of:
          3.2019496 = score(doc=2230,freq=1.0), product of:
            0.7009124 = queryWeight, product of:
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.076715484 = queryNorm
            4.5682592 = fieldWeight in 2230, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.5 = fieldNorm(doc=2230)
        3.286844 = weight(author_txt:klavans in 2230) [ClassicSimilarity], result of:
          3.286844 = score(doc=2230,freq=1.0), product of:
            0.71324736 = queryWeight, product of:
              1.0087608 = boost
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.076715484 = queryNorm
            4.6082807 = fieldWeight in 2230, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.5 = fieldNorm(doc=2230)
    
  5. Klavans, K.; Boyack, K.W.: Which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge? (2017) 6.49
    6.4887934 = sum of:
      6.4887934 = sum of:
        3.2019496 = weight(author_txt:boyack in 4535) [ClassicSimilarity], result of:
          3.2019496 = score(doc=4535,freq=1.0), product of:
            0.7009124 = queryWeight, product of:
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.076715484 = queryNorm
            4.5682592 = fieldWeight in 4535, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.1365185 = idf(docFreq=12, maxDocs=44421)
              0.5 = fieldNorm(doc=4535)
        3.286844 = weight(author_txt:klavans in 4535) [ClassicSimilarity], result of:
          3.286844 = score(doc=4535,freq=1.0), product of:
            0.71324736 = queryWeight, product of:
              1.0087608 = boost
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.076715484 = queryNorm
            4.6082807 = fieldWeight in 4535, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.216561 = idf(docFreq=11, maxDocs=44421)
              0.5 = fieldNorm(doc=4535)
    

Similar documents (content)

  1. Shibata, N.; Kajikawa, Y.; Sakata, I.: Measuring relatedness between communities in a citation network (2011) 0.27
    0.26896712 = sum of:
      0.26896712 = product of:
        1.1206963 = sum of:
          0.012696423 = weight(abstract_txt:between in 484) [ClassicSimilarity], result of:
            0.012696423 = score(doc=484,freq=1.0), product of:
              0.047004797 = queryWeight, product of:
                1.2641364 = boost
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.010754718 = queryNorm
              0.2701091 = fieldWeight in 484, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.078125 = fieldNorm(doc=484)
          0.09606068 = weight(abstract_txt:cosine in 484) [ClassicSimilarity], result of:
            0.09606068 = score(doc=484,freq=1.0), product of:
              0.15825397 = queryWeight, product of:
                1.8938891 = boost
                7.769642 = idf(docFreq=50, maxDocs=44421)
                0.010754718 = queryNorm
              0.6070033 = fieldWeight in 484, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.769642 = idf(docFreq=50, maxDocs=44421)
                0.078125 = fieldNorm(doc=484)
          0.055730198 = weight(abstract_txt:journal in 484) [ClassicSimilarity], result of:
            0.055730198 = score(doc=484,freq=1.0), product of:
              0.13869514 = queryWeight, product of:
                2.5073955 = boost
                5.14327 = idf(docFreq=704, maxDocs=44421)
                0.010754718 = queryNorm
              0.40181798 = fieldWeight in 484, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.14327 = idf(docFreq=704, maxDocs=44421)
                0.078125 = fieldNorm(doc=484)
          0.082254715 = weight(abstract_txt:measure in 484) [ClassicSimilarity], result of:
            0.082254715 = score(doc=484,freq=1.0), product of:
              0.193677 = queryWeight, product of:
                3.3127317 = boost
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.010754718 = queryNorm
              0.4247005 = fieldWeight in 484, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.078125 = fieldNorm(doc=484)
          0.1618388 = weight(abstract_txt:measures in 484) [ClassicSimilarity], result of:
            0.1618388 = score(doc=484,freq=2.0), product of:
              0.27001753 = queryWeight, product of:
                4.628148 = boost
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.010754718 = queryNorm
              0.59936404 = fieldWeight in 484, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.078125 = fieldNorm(doc=484)
          0.7121155 = weight(abstract_txt:relatedness in 484) [ClassicSimilarity], result of:
            0.7121155 = score(doc=484,freq=2.0), product of:
              0.78840977 = queryWeight, product of:
                8.967255 = boost
                8.175107 = idf(docFreq=33, maxDocs=44421)
                0.010754718 = queryNorm
              0.90323025 = fieldWeight in 484, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.175107 = idf(docFreq=33, maxDocs=44421)
                0.078125 = fieldNorm(doc=484)
        0.24 = coord(6/25)
    
  2. Chen, C.-M.: Classification of scientific networks using aggregated journal-journal citation relations in the Journal Citation Reports (2008) 0.20
    0.19716206 = sum of:
      0.19716206 = product of:
        0.8215086 = sum of:
          0.055013955 = weight(abstract_txt:distances in 3690) [ClassicSimilarity], result of:
            0.055013955 = score(doc=3690,freq=1.0), product of:
              0.10051621 = queryWeight, product of:
                1.0672847 = boost
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.010754718 = queryNorm
              0.5473143 = fieldWeight in 3690, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.0625 = fieldNorm(doc=3690)
          0.038263377 = weight(abstract_txt:journals in 3690) [ClassicSimilarity], result of:
            0.038263377 = score(doc=3690,freq=3.0), product of:
              0.068930686 = queryWeight, product of:
                1.2499238 = boost
                5.1277876 = idf(docFreq=715, maxDocs=44421)
                0.010754718 = queryNorm
              0.5550993 = fieldWeight in 3690, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.1277876 = idf(docFreq=715, maxDocs=44421)
                0.0625 = fieldNorm(doc=3690)
          0.010157138 = weight(abstract_txt:between in 3690) [ClassicSimilarity], result of:
            0.010157138 = score(doc=3690,freq=1.0), product of:
              0.047004797 = queryWeight, product of:
                1.2641364 = boost
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.010754718 = queryNorm
              0.21608727 = fieldWeight in 3690, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.0625 = fieldNorm(doc=3690)
          0.030423075 = weight(abstract_txt:algorithm in 3690) [ClassicSimilarity], result of:
            0.030423075 = score(doc=3690,freq=1.0), product of:
              0.08532303 = queryWeight, product of:
                1.3906261 = boost
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.010754718 = queryNorm
              0.35656348 = fieldWeight in 3690, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.0625 = fieldNorm(doc=3690)
          0.11795859 = weight(abstract_txt:journal in 3690) [ClassicSimilarity], result of:
            0.11795859 = score(doc=3690,freq=7.0), product of:
              0.13869514 = queryWeight, product of:
                2.5073955 = boost
                5.14327 = idf(docFreq=704, maxDocs=44421)
                0.010754718 = queryNorm
              0.8504883 = fieldWeight in 3690, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                5.14327 = idf(docFreq=704, maxDocs=44421)
                0.0625 = fieldNorm(doc=3690)
          0.56969243 = weight(abstract_txt:relatedness in 3690) [ClassicSimilarity], result of:
            0.56969243 = score(doc=3690,freq=2.0), product of:
              0.78840977 = queryWeight, product of:
                8.967255 = boost
                8.175107 = idf(docFreq=33, maxDocs=44421)
                0.010754718 = queryNorm
              0.7225842 = fieldWeight in 3690, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.175107 = idf(docFreq=33, maxDocs=44421)
                0.0625 = fieldNorm(doc=3690)
        0.24 = coord(6/25)
    
  3. Allen, R.B.; Wu, Y.: Metrics for the scope of a collection (2005) 0.18
    0.18176739 = sum of:
      0.18176739 = product of:
        0.90883696 = sum of:
          0.06876744 = weight(abstract_txt:distances in 5570) [ClassicSimilarity], result of:
            0.06876744 = score(doc=5570,freq=1.0), product of:
              0.10051621 = queryWeight, product of:
                1.0672847 = boost
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.010754718 = queryNorm
              0.6841428 = fieldWeight in 5570, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.078125 = fieldNorm(doc=5570)
          0.021990849 = weight(abstract_txt:between in 5570) [ClassicSimilarity], result of:
            0.021990849 = score(doc=5570,freq=3.0), product of:
              0.047004797 = queryWeight, product of:
                1.2641364 = boost
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.010754718 = queryNorm
              0.46784264 = fieldWeight in 5570, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.078125 = fieldNorm(doc=5570)
          0.11632573 = weight(abstract_txt:measure in 5570) [ClassicSimilarity], result of:
            0.11632573 = score(doc=5570,freq=2.0), product of:
              0.193677 = queryWeight, product of:
                3.3127317 = boost
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.010754718 = queryNorm
              0.6006172 = fieldWeight in 5570, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.078125 = fieldNorm(doc=5570)
          0.19821125 = weight(abstract_txt:measures in 5570) [ClassicSimilarity], result of:
            0.19821125 = score(doc=5570,freq=3.0), product of:
              0.27001753 = queryWeight, product of:
                4.628148 = boost
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.010754718 = queryNorm
              0.7340681 = fieldWeight in 5570, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.078125 = fieldNorm(doc=5570)
          0.5035417 = weight(abstract_txt:relatedness in 5570) [ClassicSimilarity], result of:
            0.5035417 = score(doc=5570,freq=1.0), product of:
              0.78840977 = queryWeight, product of:
                8.967255 = boost
                8.175107 = idf(docFreq=33, maxDocs=44421)
                0.010754718 = queryNorm
              0.6386802 = fieldWeight in 5570, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.175107 = idf(docFreq=33, maxDocs=44421)
                0.078125 = fieldNorm(doc=5570)
        0.2 = coord(5/25)
    
  4. Zhang, C.; Liu, X.; Xu, Y.(C.); Wang, Y.: Quality-structure index : a new metric to measure scientific journal influence (2011) 0.17
    0.16548446 = sum of:
      0.16548446 = product of:
        0.51713896 = sum of:
          0.030408181 = weight(abstract_txt:index in 366) [ClassicSimilarity], result of:
            0.030408181 = score(doc=366,freq=3.0), product of:
              0.059140373 = queryWeight, product of:
                1.1577619 = boost
                4.7496953 = idf(docFreq=1044, maxDocs=44421)
                0.010754718 = queryNorm
              0.5141696 = fieldWeight in 366, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.7496953 = idf(docFreq=1044, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.04418274 = weight(abstract_txt:journals in 366) [ClassicSimilarity], result of:
            0.04418274 = score(doc=366,freq=4.0), product of:
              0.068930686 = queryWeight, product of:
                1.2499238 = boost
                5.1277876 = idf(docFreq=715, maxDocs=44421)
                0.010754718 = queryNorm
              0.64097345 = fieldWeight in 366, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.1277876 = idf(docFreq=715, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.010157138 = weight(abstract_txt:between in 366) [ClassicSimilarity], result of:
            0.010157138 = score(doc=366,freq=1.0), product of:
              0.047004797 = queryWeight, product of:
                1.2641364 = boost
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.010754718 = queryNorm
              0.21608727 = fieldWeight in 366, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.030423075 = weight(abstract_txt:algorithm in 366) [ClassicSimilarity], result of:
            0.030423075 = score(doc=366,freq=1.0), product of:
              0.08532303 = queryWeight, product of:
                1.3906261 = boost
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.010754718 = queryNorm
              0.35656348 = fieldWeight in 366, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.038448744 = weight(abstract_txt:bibliometric in 366) [ClassicSimilarity], result of:
            0.038448744 = score(doc=366,freq=1.0), product of:
              0.09973608 = queryWeight, product of:
                1.5034999 = boost
                6.168078 = idf(docFreq=252, maxDocs=44421)
                0.010754718 = queryNorm
              0.38550487 = fieldWeight in 366, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.168078 = idf(docFreq=252, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.14098749 = weight(abstract_txt:journal in 366) [ClassicSimilarity], result of:
            0.14098749 = score(doc=366,freq=10.0), product of:
              0.13869514 = queryWeight, product of:
                2.5073955 = boost
                5.14327 = idf(docFreq=704, maxDocs=44421)
                0.010754718 = queryNorm
              1.016528 = fieldWeight in 366, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                5.14327 = idf(docFreq=704, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.09306058 = weight(abstract_txt:measure in 366) [ClassicSimilarity], result of:
            0.09306058 = score(doc=366,freq=2.0), product of:
              0.193677 = queryWeight, product of:
                3.3127317 = boost
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.010754718 = queryNorm
              0.48049375 = fieldWeight in 366, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
          0.12947103 = weight(abstract_txt:measures in 366) [ClassicSimilarity], result of:
            0.12947103 = score(doc=366,freq=2.0), product of:
              0.27001753 = queryWeight, product of:
                4.628148 = boost
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.010754718 = queryNorm
              0.47949123 = fieldWeight in 366, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.0625 = fieldNorm(doc=366)
        0.32 = coord(8/25)
    
  5. Eck, N.J. van; Waltman, L.: Appropriate similarity measures for author co-citation analysis (2008) 0.16
    0.16352838 = sum of:
      0.16352838 = product of:
        0.5840299 = sum of:
          0.09555292 = weight(abstract_txt:pearson in 3008) [ClassicSimilarity], result of:
            0.09555292 = score(doc=3008,freq=2.0), product of:
              0.09934214 = queryWeight, product of:
                1.0610332 = boost
                8.705735 = idf(docFreq=19, maxDocs=44421)
                0.010754718 = queryNorm
              0.9618569 = fieldWeight in 3008, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.705735 = idf(docFreq=19, maxDocs=44421)
                0.078125 = fieldNorm(doc=3008)
          0.02052966 = weight(abstract_txt:authors in 3008) [ClassicSimilarity], result of:
            0.02052966 = score(doc=3008,freq=1.0), product of:
              0.05656902 = queryWeight, product of:
                1.1323133 = boost
                4.6452923 = idf(docFreq=1159, maxDocs=44421)
                0.010754718 = queryNorm
              0.36291346 = fieldWeight in 3008, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6452923 = idf(docFreq=1159, maxDocs=44421)
                0.078125 = fieldNorm(doc=3008)
          0.012696423 = weight(abstract_txt:between in 3008) [ClassicSimilarity], result of:
            0.012696423 = score(doc=3008,freq=1.0), product of:
              0.047004797 = queryWeight, product of:
                1.2641364 = boost
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.010754718 = queryNorm
              0.2701091 = fieldWeight in 3008, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4573963 = idf(docFreq=3804, maxDocs=44421)
                0.078125 = fieldNorm(doc=3008)
          0.04806093 = weight(abstract_txt:bibliometric in 3008) [ClassicSimilarity], result of:
            0.04806093 = score(doc=3008,freq=1.0), product of:
              0.09973608 = queryWeight, product of:
                1.5034999 = boost
                6.168078 = idf(docFreq=252, maxDocs=44421)
                0.010754718 = queryNorm
              0.48188108 = fieldWeight in 3008, 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=3008)
          0.09606068 = weight(abstract_txt:cosine in 3008) [ClassicSimilarity], result of:
            0.09606068 = score(doc=3008,freq=1.0), product of:
              0.15825397 = queryWeight, product of:
                1.8938891 = boost
                7.769642 = idf(docFreq=50, maxDocs=44421)
                0.010754718 = queryNorm
              0.6070033 = fieldWeight in 3008, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.769642 = idf(docFreq=50, maxDocs=44421)
                0.078125 = fieldNorm(doc=3008)
          0.082254715 = weight(abstract_txt:measure in 3008) [ClassicSimilarity], result of:
            0.082254715 = score(doc=3008,freq=1.0), product of:
              0.193677 = queryWeight, product of:
                3.3127317 = boost
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.010754718 = queryNorm
              0.4247005 = fieldWeight in 3008, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4361663 = idf(docFreq=525, maxDocs=44421)
                0.078125 = fieldNorm(doc=3008)
          0.22887464 = weight(abstract_txt:measures in 3008) [ClassicSimilarity], result of:
            0.22887464 = score(doc=3008,freq=4.0), product of:
              0.27001753 = queryWeight, product of:
                4.628148 = boost
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.010754718 = queryNorm
              0.8476288 = fieldWeight in 3008, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.424824 = idf(docFreq=531, maxDocs=44421)
                0.078125 = fieldNorm(doc=3008)
        0.28 = coord(7/25)