Document (#33359)

Author
Larivière, V.
Archambault, E.
Gingras, Y.
Title
Long-term variations in the aging of scientific literature : from exponential growth to steady-state science (1900-2004)
Source
Journal of the American Society for Information Science and Technology. 59(2008) no.2, S.288-296
Year
2008
Abstract
Despite a very large number of studies on the aging and obsolescence of scientific literature, no study has yet measured, over a very long time period, the changes in the rates at which scientific literature becomes obsolete. This article studies the evolution of the aging phenomenon and, in particular, how the age of cited literature has changed over more than 100 years of scientific activity. It shows that the average and median ages of cited literature have undergone several changes over the period. Specifically, both World War I and World War II had the effect of significantly increasing the age of the cited literature. The major finding of this article is that contrary to a widely held belief, the age of cited material has risen continuously since the mid-1960s. In other words, during that period, researchers were relying on an increasingly old body of literature. Our data suggest that this phenomenon is a direct response to the steady-state dynamics of modern science that followed its exponential growth; however, we also have observed that online preprint archives such as arXiv have had the opposite effect in some subfields.
Theme
Informetrie

Similar documents (author)

  1. Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009) 5.87
    5.8721457 = sum of:
      5.8721457 = sum of:
        1.489374 = weight(author_txt:larivière in 4764) [ClassicSimilarity], result of:
          1.489374 = score(doc=4764,freq=1.0), product of:
            0.47876784 = queryWeight, product of:
              8.295595 = idf(docFreq=28, maxDocs=42740)
              0.0577135 = queryNorm
            3.1108482 = fieldWeight in 4764, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.295595 = idf(docFreq=28, maxDocs=42740)
              0.375 = fieldNorm(doc=4764)
        1.8734181 = weight(author_txt:gingras in 4764) [ClassicSimilarity], result of:
          1.8734181 = score(doc=4764,freq=1.0), product of:
            0.5578862 = queryWeight, product of:
              1.0794693 = boost
              8.954841 = idf(docFreq=14, maxDocs=42740)
              0.0577135 = queryNorm
            3.3580651 = fieldWeight in 4764, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.954841 = idf(docFreq=14, maxDocs=42740)
              0.375 = fieldNorm(doc=4764)
        2.5093536 = weight(author_txt:archambault in 4764) [ClassicSimilarity], result of:
          2.5093536 = score(doc=4764,freq=1.0), product of:
            0.677897 = queryWeight, product of:
              1.1899244 = boost
              9.871131 = idf(docFreq=5, maxDocs=42740)
              0.0577135 = queryNorm
            3.701674 = fieldWeight in 4764, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.871131 = idf(docFreq=5, maxDocs=42740)
              0.375 = fieldNorm(doc=4764)
    
  2. Larivière, V.; Archambault, V.; Gingras, Y.; Vignola-Gagné, E.: ¬The place of serials in referencing practices : comparing natural sciences and engineering with social sciences and humanities (2006) 4.89
    4.893455 = sum of:
      4.893455 = sum of:
        1.241145 = weight(author_txt:larivière in 108) [ClassicSimilarity], result of:
          1.241145 = score(doc=108,freq=1.0), product of:
            0.47876784 = queryWeight, product of:
              8.295595 = idf(docFreq=28, maxDocs=42740)
              0.0577135 = queryNorm
            2.5923734 = fieldWeight in 108, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.295595 = idf(docFreq=28, maxDocs=42740)
              0.3125 = fieldNorm(doc=108)
        1.5611819 = weight(author_txt:gingras in 108) [ClassicSimilarity], result of:
          1.5611819 = score(doc=108,freq=1.0), product of:
            0.5578862 = queryWeight, product of:
              1.0794693 = boost
              8.954841 = idf(docFreq=14, maxDocs=42740)
              0.0577135 = queryNorm
            2.7983878 = fieldWeight in 108, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.954841 = idf(docFreq=14, maxDocs=42740)
              0.3125 = fieldNorm(doc=108)
        2.091128 = weight(author_txt:archambault in 108) [ClassicSimilarity], result of:
          2.091128 = score(doc=108,freq=1.0), product of:
            0.677897 = queryWeight, product of:
              1.1899244 = boost
              9.871131 = idf(docFreq=5, maxDocs=42740)
              0.0577135 = queryNorm
            3.0847285 = fieldWeight in 108, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.871131 = idf(docFreq=5, maxDocs=42740)
              0.3125 = fieldNorm(doc=108)
    
  3. Archambault, E.; Campbell, D; Gingras, Y.; Larivière, V.: Comparing bibliometric statistics obtained from the Web of Science and Scopus (2009) 4.89
    4.893455 = sum of:
      4.893455 = sum of:
        1.241145 = weight(author_txt:larivière in 4934) [ClassicSimilarity], result of:
          1.241145 = score(doc=4934,freq=1.0), product of:
            0.47876784 = queryWeight, product of:
              8.295595 = idf(docFreq=28, maxDocs=42740)
              0.0577135 = queryNorm
            2.5923734 = fieldWeight in 4934, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.295595 = idf(docFreq=28, maxDocs=42740)
              0.3125 = fieldNorm(doc=4934)
        1.5611819 = weight(author_txt:gingras in 4934) [ClassicSimilarity], result of:
          1.5611819 = score(doc=4934,freq=1.0), product of:
            0.5578862 = queryWeight, product of:
              1.0794693 = boost
              8.954841 = idf(docFreq=14, maxDocs=42740)
              0.0577135 = queryNorm
            2.7983878 = fieldWeight in 4934, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.954841 = idf(docFreq=14, maxDocs=42740)
              0.3125 = fieldNorm(doc=4934)
        2.091128 = weight(author_txt:archambault in 4934) [ClassicSimilarity], result of:
          2.091128 = score(doc=4934,freq=1.0), product of:
            0.677897 = queryWeight, product of:
              1.1899244 = boost
              9.871131 = idf(docFreq=5, maxDocs=42740)
              0.0577135 = queryNorm
            3.0847285 = fieldWeight in 4934, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              9.871131 = idf(docFreq=5, maxDocs=42740)
              0.3125 = fieldNorm(doc=4934)
    
  4. Larivière, V.; Gingras, Y.: On the relationship between interdisciplinarity and scientific impact (2009) 2.99
    2.9891489 = sum of:
      2.9891489 = product of:
        4.483723 = sum of:
          1.9858321 = weight(author_txt:larivière in 317) [ClassicSimilarity], result of:
            1.9858321 = score(doc=317,freq=1.0), product of:
              0.47876784 = queryWeight, product of:
                8.295595 = idf(docFreq=28, maxDocs=42740)
                0.0577135 = queryNorm
              4.1477976 = fieldWeight in 317, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.295595 = idf(docFreq=28, maxDocs=42740)
                0.5 = fieldNorm(doc=317)
          2.497891 = weight(author_txt:gingras in 317) [ClassicSimilarity], result of:
            2.497891 = score(doc=317,freq=1.0), product of:
              0.5578862 = queryWeight, product of:
                1.0794693 = boost
                8.954841 = idf(docFreq=14, maxDocs=42740)
                0.0577135 = queryNorm
              4.4774203 = fieldWeight in 317, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.954841 = idf(docFreq=14, maxDocs=42740)
                0.5 = fieldNorm(doc=317)
        0.6666667 = coord(2/3)
    
  5. Larivière, V.; Gingras, Y.: ¬The impact factor's Matthew Effect : a natural experiment in bibliometrics (2010) 2.99
    2.9891489 = sum of:
      2.9891489 = product of:
        4.483723 = sum of:
          1.9858321 = weight(author_txt:larivière in 339) [ClassicSimilarity], result of:
            1.9858321 = score(doc=339,freq=1.0), product of:
              0.47876784 = queryWeight, product of:
                8.295595 = idf(docFreq=28, maxDocs=42740)
                0.0577135 = queryNorm
              4.1477976 = fieldWeight in 339, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.295595 = idf(docFreq=28, maxDocs=42740)
                0.5 = fieldNorm(doc=339)
          2.497891 = weight(author_txt:gingras in 339) [ClassicSimilarity], result of:
            2.497891 = score(doc=339,freq=1.0), product of:
              0.5578862 = queryWeight, product of:
                1.0794693 = boost
                8.954841 = idf(docFreq=14, maxDocs=42740)
                0.0577135 = queryNorm
              4.4774203 = fieldWeight in 339, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.954841 = idf(docFreq=14, maxDocs=42740)
                0.5 = fieldNorm(doc=339)
        0.6666667 = coord(2/3)
    

Similar documents (content)

  1. Egghe, L.; Rousseau, R.: Aging, obsolescence, impact, growth, and utilization : definitions and relations (2000) 0.32
    0.32080457 = sum of:
      0.32080457 = product of:
        1.1457306 = sum of:
          0.101564236 = weight(abstract_txt:obsolescence in 70) [ClassicSimilarity], result of:
            0.101564236 = score(doc=70,freq=1.0), product of:
              0.15537395 = queryWeight, product of:
                8.367054 = idf(docFreq=26, maxDocs=42740)
                0.018569732 = queryNorm
              0.6536761 = fieldWeight in 70, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.367054 = idf(docFreq=26, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
          0.017570555 = weight(abstract_txt:have in 70) [ClassicSimilarity], result of:
            0.017570555 = score(doc=70,freq=1.0), product of:
              0.06957423 = queryWeight, product of:
                1.1590328 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.018569732 = queryNorm
              0.25254402 = fieldWeight in 70, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
          0.13979553 = weight(abstract_txt:growth in 70) [ClassicSimilarity], result of:
            0.13979553 = score(doc=70,freq=5.0), product of:
              0.14165542 = queryWeight, product of:
                1.350338 = boost
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.018569732 = queryNorm
              0.9868703 = fieldWeight in 70, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
          0.040243328 = weight(abstract_txt:over in 70) [ClassicSimilarity], result of:
            0.040243328 = score(doc=70,freq=1.0), product of:
              0.12088915 = queryWeight, product of:
                1.5277953 = boost
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.018569732 = queryNorm
              0.33289444 = fieldWeight in 70, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
          0.0202032 = weight(abstract_txt:that in 70) [ClassicSimilarity], result of:
            0.0202032 = score(doc=70,freq=2.0), product of:
              0.076360986 = queryWeight, product of:
                1.7172055 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.018569732 = queryNorm
              0.2645749 = fieldWeight in 70, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
          0.09377767 = weight(abstract_txt:period in 70) [ClassicSimilarity], result of:
            0.09377767 = score(doc=70,freq=1.0), product of:
              0.21248308 = queryWeight, product of:
                2.0255067 = boost
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.018569732 = queryNorm
              0.44134182 = fieldWeight in 70, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
          0.7325761 = weight(abstract_txt:aging in 70) [ClassicSimilarity], result of:
            0.7325761 = score(doc=70,freq=5.0), product of:
              0.48921892 = queryWeight, product of:
                3.0734286 = boost
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.018569732 = queryNorm
              1.4974402 = fieldWeight in 70, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.078125 = fieldNorm(doc=70)
        0.28 = coord(7/25)
    
  2. Alvarez, P.; Escalona, I.; Pulgarin, A.: What is wrong with obsolescence? (2000) 0.24
    0.24008097 = sum of:
      0.24008097 = product of:
        0.857432 = sum of:
          0.101564236 = weight(abstract_txt:obsolescence in 5859) [ClassicSimilarity], result of:
            0.101564236 = score(doc=5859,freq=1.0), product of:
              0.15537395 = queryWeight, product of:
                8.367054 = idf(docFreq=26, maxDocs=42740)
                0.018569732 = queryNorm
              0.6536761 = fieldWeight in 5859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.367054 = idf(docFreq=26, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
          0.062518455 = weight(abstract_txt:growth in 5859) [ClassicSimilarity], result of:
            0.062518455 = score(doc=5859,freq=1.0), product of:
              0.14165542 = queryWeight, product of:
                1.350338 = boost
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.018569732 = queryNorm
              0.44134182 = fieldWeight in 5859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
          0.040243328 = weight(abstract_txt:over in 5859) [ClassicSimilarity], result of:
            0.040243328 = score(doc=5859,freq=1.0), product of:
              0.12088915 = queryWeight, product of:
                1.5277953 = boost
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.018569732 = queryNorm
              0.33289444 = fieldWeight in 5859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
          0.024743766 = weight(abstract_txt:that in 5859) [ClassicSimilarity], result of:
            0.024743766 = score(doc=5859,freq=3.0), product of:
              0.076360986 = queryWeight, product of:
                1.7172055 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.018569732 = queryNorm
              0.32403675 = fieldWeight in 5859, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
          0.09377767 = weight(abstract_txt:period in 5859) [ClassicSimilarity], result of:
            0.09377767 = score(doc=5859,freq=1.0), product of:
              0.21248308 = queryWeight, product of:
                2.0255067 = boost
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.018569732 = queryNorm
              0.44134182 = fieldWeight in 5859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
          0.07126281 = weight(abstract_txt:scientific in 5859) [ClassicSimilarity], result of:
            0.07126281 = score(doc=5859,freq=1.0), product of:
              0.19475096 = queryWeight, product of:
                2.2391372 = boost
                4.6837454 = idf(docFreq=1073, maxDocs=42740)
                0.018569732 = queryNorm
              0.36591762 = fieldWeight in 5859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6837454 = idf(docFreq=1073, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
          0.46332178 = weight(abstract_txt:aging in 5859) [ClassicSimilarity], result of:
            0.46332178 = score(doc=5859,freq=2.0), product of:
              0.48921892 = queryWeight, product of:
                3.0734286 = boost
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.018569732 = queryNorm
              0.9470643 = fieldWeight in 5859, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.078125 = fieldNorm(doc=5859)
        0.28 = coord(7/25)
    
  3. Lisée, C.; Larivière, V.; Archambault, E.: Conference proceedings as a source of scientific information : a bibliometric analysis (2008) 0.22
    0.21921156 = sum of:
      0.21921156 = product of:
        0.7828984 = sum of:
          0.019878812 = weight(abstract_txt:have in 4357) [ClassicSimilarity], result of:
            0.019878812 = score(doc=4357,freq=2.0), product of:
              0.06957423 = queryWeight, product of:
                1.1590328 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.018569732 = queryNorm
              0.2857209 = fieldWeight in 4357, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
          0.03219466 = weight(abstract_txt:over in 4357) [ClassicSimilarity], result of:
            0.03219466 = score(doc=4357,freq=1.0), product of:
              0.12088915 = queryWeight, product of:
                1.5277953 = boost
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.018569732 = queryNorm
              0.26631555 = fieldWeight in 4357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
          0.027994376 = weight(abstract_txt:that in 4357) [ClassicSimilarity], result of:
            0.027994376 = score(doc=4357,freq=6.0), product of:
              0.076360986 = queryWeight, product of:
                1.7172055 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.018569732 = queryNorm
              0.36660573 = fieldWeight in 4357, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
          0.16124932 = weight(abstract_txt:scientific in 4357) [ClassicSimilarity], result of:
            0.16124932 = score(doc=4357,freq=8.0), product of:
              0.19475096 = queryWeight, product of:
                2.2391372 = boost
                4.6837454 = idf(docFreq=1073, maxDocs=42740)
                0.018569732 = queryNorm
              0.827977 = fieldWeight in 4357, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                4.6837454 = idf(docFreq=1073, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
          0.10837515 = weight(abstract_txt:cited in 4357) [ClassicSimilarity], result of:
            0.10837515 = score(doc=4357,freq=1.0), product of:
              0.29885748 = queryWeight, product of:
                2.773786 = boost
                5.8021045 = idf(docFreq=350, maxDocs=42740)
                0.018569732 = queryNorm
              0.36263153 = fieldWeight in 4357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.8021045 = idf(docFreq=350, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
          0.26209438 = weight(abstract_txt:aging in 4357) [ClassicSimilarity], result of:
            0.26209438 = score(doc=4357,freq=1.0), product of:
              0.48921892 = queryWeight, product of:
                3.0734286 = boost
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.018569732 = queryNorm
              0.5357405 = fieldWeight in 4357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
          0.17111173 = weight(abstract_txt:literature in 4357) [ClassicSimilarity], result of:
            0.17111173 = score(doc=4357,freq=4.0), product of:
              0.30762637 = queryWeight, product of:
                3.722817 = boost
                4.4498587 = idf(docFreq=1356, maxDocs=42740)
                0.018569732 = queryNorm
              0.55623233 = fieldWeight in 4357, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.4498587 = idf(docFreq=1356, maxDocs=42740)
                0.0625 = fieldNorm(doc=4357)
        0.28 = coord(7/25)
    
  4. Shibata, N.; Kajikawa, Y.; Matsushima, K.: Topological analysis of citation networks to discover the future core articles (2007) 0.21
    0.2076054 = sum of:
      0.2076054 = product of:
        0.74144787 = sum of:
          0.022238139 = weight(abstract_txt:studies in 2287) [ClassicSimilarity], result of:
            0.022238139 = score(doc=2287,freq=1.0), product of:
              0.08252141 = queryWeight, product of:
                1.0306453 = boost
                4.3117323 = idf(docFreq=1557, maxDocs=42740)
                0.018569732 = queryNorm
              0.26948327 = fieldWeight in 2287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.3117323 = idf(docFreq=1557, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
          0.014056443 = weight(abstract_txt:have in 2287) [ClassicSimilarity], result of:
            0.014056443 = score(doc=2287,freq=1.0), product of:
              0.06957423 = queryWeight, product of:
                1.1590328 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.018569732 = queryNorm
              0.2020352 = fieldWeight in 2287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
          0.064667016 = weight(abstract_txt:effect in 2287) [ClassicSimilarity], result of:
            0.064667016 = score(doc=2287,freq=2.0), product of:
              0.133438 = queryWeight, product of:
                1.3105865 = boost
                5.482874 = idf(docFreq=482, maxDocs=42740)
                0.018569732 = queryNorm
              0.48462215 = fieldWeight in 2287, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.482874 = idf(docFreq=482, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
          0.07186321 = weight(abstract_txt:phenomenon in 2287) [ClassicSimilarity], result of:
            0.07186321 = score(doc=2287,freq=1.0), product of:
              0.18037324 = queryWeight, product of:
                1.5237437 = boost
                6.3746233 = idf(docFreq=197, maxDocs=42740)
                0.018569732 = queryNorm
              0.39841396 = fieldWeight in 2287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.3746233 = idf(docFreq=197, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
          0.019795012 = weight(abstract_txt:that in 2287) [ClassicSimilarity], result of:
            0.019795012 = score(doc=2287,freq=3.0), product of:
              0.076360986 = queryWeight, product of:
                1.7172055 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.018569732 = queryNorm
              0.2592294 = fieldWeight in 2287, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
          0.2867337 = weight(abstract_txt:cited in 2287) [ClassicSimilarity], result of:
            0.2867337 = score(doc=2287,freq=7.0), product of:
              0.29885748 = queryWeight, product of:
                2.773786 = boost
                5.8021045 = idf(docFreq=350, maxDocs=42740)
                0.018569732 = queryNorm
              0.95943284 = fieldWeight in 2287, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                5.8021045 = idf(docFreq=350, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
          0.26209438 = weight(abstract_txt:aging in 2287) [ClassicSimilarity], result of:
            0.26209438 = score(doc=2287,freq=1.0), product of:
              0.48921892 = queryWeight, product of:
                3.0734286 = boost
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.018569732 = queryNorm
              0.5357405 = fieldWeight in 2287, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.571848 = idf(docFreq=21, maxDocs=42740)
                0.0625 = fieldNorm(doc=2287)
        0.28 = coord(7/25)
    
  5. Huber, J.C.: ¬A new method for analyzing scientific productivity (2001) 0.19
    0.18741374 = sum of:
      0.18741374 = product of:
        0.5205937 = sum of:
          0.022238139 = weight(abstract_txt:studies in 846) [ClassicSimilarity], result of:
            0.022238139 = score(doc=846,freq=1.0), product of:
              0.08252141 = queryWeight, product of:
                1.0306453 = boost
                4.3117323 = idf(docFreq=1557, maxDocs=42740)
                0.018569732 = queryNorm
              0.26948327 = fieldWeight in 846, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.3117323 = idf(docFreq=1557, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.024346475 = weight(abstract_txt:have in 846) [ClassicSimilarity], result of:
            0.024346475 = score(doc=846,freq=3.0), product of:
              0.06957423 = queryWeight, product of:
                1.1590328 = boost
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.018569732 = queryNorm
              0.34993523 = fieldWeight in 846, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.2325633 = idf(docFreq=4583, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.057516817 = weight(abstract_txt:very in 846) [ClassicSimilarity], result of:
            0.057516817 = score(doc=846,freq=3.0), product of:
              0.10780953 = queryWeight, product of:
                1.1780249 = boost
                4.928299 = idf(docFreq=840, maxDocs=42740)
                0.018569732 = queryNorm
              0.533504 = fieldWeight in 846, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.928299 = idf(docFreq=840, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.041583255 = weight(abstract_txt:long in 846) [ClassicSimilarity], result of:
            0.041583255 = score(doc=846,freq=1.0), product of:
              0.12525065 = queryWeight, product of:
                1.2697432 = boost
                5.312005 = idf(docFreq=572, maxDocs=42740)
                0.018569732 = queryNorm
              0.33200032 = fieldWeight in 846, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.312005 = idf(docFreq=572, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.03219466 = weight(abstract_txt:over in 846) [ClassicSimilarity], result of:
            0.03219466 = score(doc=846,freq=1.0), product of:
              0.12088915 = queryWeight, product of:
                1.5277953 = boost
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.018569732 = queryNorm
              0.26631555 = fieldWeight in 846, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.261049 = idf(docFreq=1638, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.027994376 = weight(abstract_txt:that in 846) [ClassicSimilarity], result of:
            0.027994376 = score(doc=846,freq=6.0), product of:
              0.076360986 = queryWeight, product of:
                1.7172055 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.018569732 = queryNorm
              0.36660573 = fieldWeight in 846, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.18268757 = weight(abstract_txt:exponential in 846) [ClassicSimilarity], result of:
            0.18268757 = score(doc=846,freq=2.0), product of:
              0.26666355 = queryWeight, product of:
                1.8527112 = boost
                7.7508674 = idf(docFreq=49, maxDocs=42740)
                0.018569732 = queryNorm
              0.68508637 = fieldWeight in 846, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.7508674 = idf(docFreq=49, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.07502213 = weight(abstract_txt:period in 846) [ClassicSimilarity], result of:
            0.07502213 = score(doc=846,freq=1.0), product of:
              0.21248308 = queryWeight, product of:
                2.0255067 = boost
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.018569732 = queryNorm
              0.35307345 = fieldWeight in 846, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.649175 = idf(docFreq=408, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
          0.057010245 = weight(abstract_txt:scientific in 846) [ClassicSimilarity], result of:
            0.057010245 = score(doc=846,freq=1.0), product of:
              0.19475096 = queryWeight, product of:
                2.2391372 = boost
                4.6837454 = idf(docFreq=1073, maxDocs=42740)
                0.018569732 = queryNorm
              0.2927341 = fieldWeight in 846, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6837454 = idf(docFreq=1073, maxDocs=42740)
                0.0625 = fieldNorm(doc=846)
        0.36 = coord(9/25)