Document (#18149)

Author
Leydesdorff, L.
Title
Why words and co-word cannot map the development of the science
Source
Journal of the American Society for Information Science. 48(1997) no.5, S.418-427
Year
1997
Abstract
Analyses and compares in term of co-occurrences and co-absenses of words in a restricted set of full-text articles from a sub-specialty of biochemistry. By using the distribution of words over the section, a clear distinction among 'theoretical' 'observation', and 'methodological' terminology can be made in individual articles. However, at the level of the set this structure is no longer retrieval: Words change both in terms of frequencies of relations with other words, and in terms of positional meaning from 1 text to another. The fluidity of networks in which nodes and links may chenge positions is ecpected to destabilise representations of developments of the sciences on the basis of co-occurrences and co-absenses of words. Discusses the consequences for the lexicographic approach to generating artificial intelligence from scientific texts
Theme
Informetrie
Field
Biochemie

Similar documents (author)

  1. Leydesdorff, L.: ¬The generation of aggregated journal-journal citation maps on the basis of the CD-ROM version of the Science Citation Index (1994) 4.50
    4.4984426 = sum of:
      4.4984426 = weight(author_txt:leydesdorff in 281) [ClassicSimilarity], result of:
        4.4984426 = fieldWeight in 281, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.1975083 = idf(docFreq=87, maxDocs=43254)
          0.625 = fieldNorm(doc=281)
    
  2. Leydesdorff, L.: Theories of citation? (1999) 4.50
    4.4984426 = sum of:
      4.4984426 = weight(author_txt:leydesdorff in 131) [ClassicSimilarity], result of:
        4.4984426 = fieldWeight in 131, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.1975083 = idf(docFreq=87, maxDocs=43254)
          0.625 = fieldNorm(doc=131)
    
  3. Leydesdorff, L.: ¬A sociological theory of communication : the self-organization of the knowledge-based society (2001) 4.50
    4.4984426 = sum of:
      4.4984426 = weight(author_txt:leydesdorff in 2185) [ClassicSimilarity], result of:
        4.4984426 = fieldWeight in 2185, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.1975083 = idf(docFreq=87, maxDocs=43254)
          0.625 = fieldNorm(doc=2185)
    
  4. Leydesdorff, L.: Dynamic and evolutionary updates of classificatory schemes in scientific journal structures (2002) 4.50
    4.4984426 = sum of:
      4.4984426 = weight(author_txt:leydesdorff in 3250) [ClassicSimilarity], result of:
        4.4984426 = fieldWeight in 3250, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.1975083 = idf(docFreq=87, maxDocs=43254)
          0.625 = fieldNorm(doc=3250)
    
  5. Leydesdorff, L.: ¬The construction and globalization of the knowledge base in inter-human communication systems (2003) 4.50
    4.4984426 = sum of:
      4.4984426 = weight(author_txt:leydesdorff in 3622) [ClassicSimilarity], result of:
        4.4984426 = fieldWeight in 3622, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.1975083 = idf(docFreq=87, maxDocs=43254)
          0.625 = fieldNorm(doc=3622)
    

Similar documents (content)

  1. Khoo, C.S.G.; Dai, D.; Loh, T.E.: Using statistical and contextual information to identify two- and three-character words in Chinese text (2002) 0.19
    0.19295019 = sum of:
      0.19295019 = product of:
        0.80395913 = sum of:
          0.05044423 = weight(abstract_txt:longer in 207) [ClassicSimilarity], result of:
            0.05044423 = score(doc=207,freq=1.0), product of:
              0.12587152 = queryWeight, product of:
                1.0720671 = boost
                6.4121547 = idf(docFreq=192, maxDocs=43254)
                0.018310554 = queryNorm
              0.40075967 = fieldWeight in 207, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.4121547 = idf(docFreq=192, maxDocs=43254)
                0.0625 = fieldNorm(doc=207)
          0.025416177 = weight(abstract_txt:text in 207) [ClassicSimilarity], result of:
            0.025416177 = score(doc=207,freq=1.0), product of:
              0.10041609 = queryWeight, product of:
                1.3541753 = boost
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.018310554 = queryNorm
              0.25310862 = fieldWeight in 207, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.0625 = fieldNorm(doc=207)
          0.012340419 = weight(abstract_txt:from in 207) [ClassicSimilarity], result of:
            0.012340419 = score(doc=207,freq=1.0), product of:
              0.07100902 = queryWeight, product of:
                1.3946834 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.018310554 = queryNorm
              0.17378664 = fieldWeight in 207, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=207)
          0.1446571 = weight(abstract_txt:positional in 207) [ClassicSimilarity], result of:
            0.1446571 = score(doc=207,freq=1.0), product of:
              0.25406587 = queryWeight, product of:
                1.5231105 = boost
                9.109896 = idf(docFreq=12, maxDocs=43254)
                0.018310554 = queryNorm
              0.5693685 = fieldWeight in 207, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.109896 = idf(docFreq=12, maxDocs=43254)
                0.0625 = fieldNorm(doc=207)
          0.042502724 = weight(abstract_txt:articles in 207) [ClassicSimilarity], result of:
            0.042502724 = score(doc=207,freq=1.0), product of:
              0.14147325 = queryWeight, product of:
                1.6073499 = boost
                4.8068705 = idf(docFreq=960, maxDocs=43254)
                0.018310554 = queryNorm
              0.3004294 = fieldWeight in 207, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.8068705 = idf(docFreq=960, maxDocs=43254)
                0.0625 = fieldNorm(doc=207)
          0.5285984 = weight(abstract_txt:words in 207) [ClassicSimilarity], result of:
            0.5285984 = score(doc=207,freq=9.0), product of:
              0.5265504 = queryWeight, product of:
                5.370984 = boost
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.018310554 = queryNorm
              1.0038894 = fieldWeight in 207, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.0625 = fieldNorm(doc=207)
        0.24 = coord(6/25)
    
  2. Wacholder, N.; Byrd, R.J.: Retrieving information from full text using linguistic knowledge (1994) 0.15
    0.15145649 = sum of:
      0.15145649 = product of:
        0.6310687 = sum of:
          0.051174726 = weight(abstract_txt:cannot in 524) [ClassicSimilarity], result of:
            0.051174726 = score(doc=524,freq=1.0), product of:
              0.10951749 = queryWeight, product of:
                5.981113 = idf(docFreq=296, maxDocs=43254)
                0.018310554 = queryNorm
              0.46727446 = fieldWeight in 524, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.981113 = idf(docFreq=296, maxDocs=43254)
                0.078125 = fieldNorm(doc=524)
          0.07785665 = weight(abstract_txt:distinction in 524) [ClassicSimilarity], result of:
            0.07785665 = score(doc=524,freq=1.0), product of:
              0.1448695 = queryWeight, product of:
                1.1501296 = boost
                6.8790545 = idf(docFreq=120, maxDocs=43254)
                0.018310554 = queryNorm
              0.5374261 = fieldWeight in 524, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8790545 = idf(docFreq=120, maxDocs=43254)
                0.078125 = fieldNorm(doc=524)
          0.055027638 = weight(abstract_txt:text in 524) [ClassicSimilarity], result of:
            0.055027638 = score(doc=524,freq=3.0), product of:
              0.10041609 = queryWeight, product of:
                1.3541753 = boost
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.018310554 = queryNorm
              0.5479962 = fieldWeight in 524, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.078125 = fieldNorm(doc=524)
          0.031966705 = weight(abstract_txt:terms in 524) [ClassicSimilarity], result of:
            0.031966705 = score(doc=524,freq=1.0), product of:
              0.10082968 = queryWeight, product of:
                1.3569613 = boost
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.018310554 = queryNorm
              0.31703666 = fieldWeight in 524, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.078125 = fieldNorm(doc=524)
          0.19479364 = weight(abstract_txt:occurrences in 524) [ClassicSimilarity], result of:
            0.19479364 = score(doc=524,freq=1.0), product of:
              0.33638737 = queryWeight, product of:
                2.4785237 = boost
                7.412165 = idf(docFreq=70, maxDocs=43254)
                0.018310554 = queryNorm
              0.5790754 = fieldWeight in 524, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.412165 = idf(docFreq=70, maxDocs=43254)
                0.078125 = fieldNorm(doc=524)
          0.22024933 = weight(abstract_txt:words in 524) [ClassicSimilarity], result of:
            0.22024933 = score(doc=524,freq=1.0), product of:
              0.5265504 = queryWeight, product of:
                5.370984 = boost
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.018310554 = queryNorm
              0.41828725 = fieldWeight in 524, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.078125 = fieldNorm(doc=524)
        0.24 = coord(6/25)
    
  3. Haas, S.W.; Losee, R.M.: Looking in text windows : their size and composition (1994) 0.13
    0.13421817 = sum of:
      0.13421817 = product of:
        0.67109084 = sum of:
          0.088758305 = weight(abstract_txt:positions in 525) [ClassicSimilarity], result of:
            0.088758305 = score(doc=525,freq=1.0), product of:
              0.15809536 = queryWeight, product of:
                1.2014835 = boost
                7.1862087 = idf(docFreq=88, maxDocs=43254)
                0.018310554 = queryNorm
              0.5614226 = fieldWeight in 525, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1862087 = idf(docFreq=88, maxDocs=43254)
                0.078125 = fieldNorm(doc=525)
          0.07104038 = weight(abstract_txt:text in 525) [ClassicSimilarity], result of:
            0.07104038 = score(doc=525,freq=5.0), product of:
              0.10041609 = queryWeight, product of:
                1.3541753 = boost
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.018310554 = queryNorm
              0.7074601 = fieldWeight in 525, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.078125 = fieldNorm(doc=525)
          0.055367958 = weight(abstract_txt:terms in 525) [ClassicSimilarity], result of:
            0.055367958 = score(doc=525,freq=3.0), product of:
              0.10082968 = queryWeight, product of:
                1.3569613 = boost
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.018310554 = queryNorm
              0.5491236 = fieldWeight in 525, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.078125 = fieldNorm(doc=525)
          0.015425523 = weight(abstract_txt:from in 525) [ClassicSimilarity], result of:
            0.015425523 = score(doc=525,freq=1.0), product of:
              0.07100902 = queryWeight, product of:
                1.3946834 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.018310554 = queryNorm
              0.2172333 = fieldWeight in 525, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.078125 = fieldNorm(doc=525)
          0.44049865 = weight(abstract_txt:words in 525) [ClassicSimilarity], result of:
            0.44049865 = score(doc=525,freq=4.0), product of:
              0.5265504 = queryWeight, product of:
                5.370984 = boost
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.018310554 = queryNorm
              0.8365745 = fieldWeight in 525, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.078125 = fieldNorm(doc=525)
        0.2 = coord(5/25)
    
  4. Wang, F.L.; Yang, C.C.: Mining Web data for Chinese segmentation (2007) 0.13
    0.13201562 = sum of:
      0.13201562 = product of:
        0.5500651 = sum of:
          0.04093978 = weight(abstract_txt:cannot in 2605) [ClassicSimilarity], result of:
            0.04093978 = score(doc=2605,freq=1.0), product of:
              0.10951749 = queryWeight, product of:
                5.981113 = idf(docFreq=296, maxDocs=43254)
                0.018310554 = queryNorm
              0.37381956 = fieldWeight in 2605, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.981113 = idf(docFreq=296, maxDocs=43254)
                0.0625 = fieldNorm(doc=2605)
          0.08280357 = weight(abstract_txt:frequencies in 2605) [ClassicSimilarity], result of:
            0.08280357 = score(doc=2605,freq=1.0), product of:
              0.17515364 = queryWeight, product of:
                1.2646427 = boost
                7.563971 = idf(docFreq=60, maxDocs=43254)
                0.018310554 = queryNorm
              0.4727482 = fieldWeight in 2605, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.563971 = idf(docFreq=60, maxDocs=43254)
                0.0625 = fieldNorm(doc=2605)
          0.025416177 = weight(abstract_txt:text in 2605) [ClassicSimilarity], result of:
            0.025416177 = score(doc=2605,freq=1.0), product of:
              0.10041609 = queryWeight, product of:
                1.3541753 = boost
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.018310554 = queryNorm
              0.25310862 = fieldWeight in 2605, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.049738 = idf(docFreq=2048, maxDocs=43254)
                0.0625 = fieldNorm(doc=2605)
          0.0361662 = weight(abstract_txt:terms in 2605) [ClassicSimilarity], result of:
            0.0361662 = score(doc=2605,freq=2.0), product of:
              0.10082968 = queryWeight, product of:
                1.3569613 = boost
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.018310554 = queryNorm
              0.35868603 = fieldWeight in 2605, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.0625 = fieldNorm(doc=2605)
          0.012340419 = weight(abstract_txt:from in 2605) [ClassicSimilarity], result of:
            0.012340419 = score(doc=2605,freq=1.0), product of:
              0.07100902 = queryWeight, product of:
                1.3946834 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.018310554 = queryNorm
              0.17378664 = fieldWeight in 2605, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=2605)
          0.35239893 = weight(abstract_txt:words in 2605) [ClassicSimilarity], result of:
            0.35239893 = score(doc=2605,freq=4.0), product of:
              0.5265504 = queryWeight, product of:
                5.370984 = boost
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.018310554 = queryNorm
              0.6692596 = fieldWeight in 2605, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.0625 = fieldNorm(doc=2605)
        0.24 = coord(6/25)
    
  5. Vechtomova, O.: Facet-based opinion retrieval from blogs (2010) 0.12
    0.1222867 = sum of:
      0.1222867 = product of:
        0.7642919 = sum of:
          0.0542493 = weight(abstract_txt:terms in 690) [ClassicSimilarity], result of:
            0.0542493 = score(doc=690,freq=2.0), product of:
              0.10082968 = queryWeight, product of:
                1.3569613 = boost
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.018310554 = queryNorm
              0.5380291 = fieldWeight in 690, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.058069 = idf(docFreq=2031, maxDocs=43254)
                0.09375 = fieldNorm(doc=690)
          0.018510628 = weight(abstract_txt:from in 690) [ClassicSimilarity], result of:
            0.018510628 = score(doc=690,freq=1.0), product of:
              0.07100902 = queryWeight, product of:
                1.3946834 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.018310554 = queryNorm
              0.26067996 = fieldWeight in 690, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.09375 = fieldNorm(doc=690)
          0.23375238 = weight(abstract_txt:occurrences in 690) [ClassicSimilarity], result of:
            0.23375238 = score(doc=690,freq=1.0), product of:
              0.33638737 = queryWeight, product of:
                2.4785237 = boost
                7.412165 = idf(docFreq=70, maxDocs=43254)
                0.018310554 = queryNorm
              0.6948905 = fieldWeight in 690, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.412165 = idf(docFreq=70, maxDocs=43254)
                0.09375 = fieldNorm(doc=690)
          0.45777962 = weight(abstract_txt:words in 690) [ClassicSimilarity], result of:
            0.45777962 = score(doc=690,freq=3.0), product of:
              0.5265504 = queryWeight, product of:
                5.370984 = boost
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.018310554 = queryNorm
              0.8693937 = fieldWeight in 690, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.354077 = idf(docFreq=555, maxDocs=43254)
                0.09375 = fieldNorm(doc=690)
        0.16 = coord(4/25)