Document (#20140)

Author
Butler, D.
Title
Souped-up search engines
Source
Nature. 2000, no.405 vom 11.5.00, S.112-115
Year
2000
Abstract
For scientists, finding the information they want on the WWW is a hit-and-miss affair. But, as Declan Butler reports, more sophisticated and specialized search technlogies are promising to change all that
Theme
Internet
Suchmaschinen

Similar documents (author)

  1. Butler, B.: ¬The electronic library program : developing networked electronic library collections (1991) 5.44
    5.438222 = sum of:
      5.438222 = weight(author_txt:butler in 2664) [ClassicSimilarity], result of:
        5.438222 = fieldWeight in 2664, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.701155 = idf(docFreq=19, maxDocs=44218)
          0.625 = fieldNorm(doc=2664)
    
  2. Butler, J.T.: ¬A current awareness service using microcomputer databases and electronic mail (1993) 5.44
    5.438222 = sum of:
      5.438222 = weight(author_txt:butler in 4539) [ClassicSimilarity], result of:
        5.438222 = fieldWeight in 4539, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.701155 = idf(docFreq=19, maxDocs=44218)
          0.625 = fieldNorm(doc=4539)
    
  3. Butler, J.: Scholarly electronic journals on the Internet (1994) 5.44
    5.438222 = sum of:
      5.438222 = weight(author_txt:butler in 975) [ClassicSimilarity], result of:
        5.438222 = fieldWeight in 975, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.701155 = idf(docFreq=19, maxDocs=44218)
          0.625 = fieldNorm(doc=975)
    
  4. Butler, H.J.: ¬The electronic journal : a viable channel for formal scholarly communication? (1994) 5.44
    5.438222 = sum of:
      5.438222 = weight(author_txt:butler in 3518) [ClassicSimilarity], result of:
        5.438222 = fieldWeight in 3518, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.701155 = idf(docFreq=19, maxDocs=44218)
          0.625 = fieldNorm(doc=3518)
    
  5. Butler, Y.: Knowledge management : if only you knew what you knew (2000) 5.44
    5.438222 = sum of:
      5.438222 = weight(author_txt:butler in 3695) [ClassicSimilarity], result of:
        5.438222 = fieldWeight in 3695, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.701155 = idf(docFreq=19, maxDocs=44218)
          0.625 = fieldNorm(doc=3695)
    

Similar documents (content)

  1. Habernal, I.; Konopík, M.; Rohlík, O.: Question answering (2012) 0.27
    0.2727065 = sum of:
      0.2727065 = product of:
        0.5843711 = sum of:
          0.007815667 = weight(abstract_txt:that in 101) [ClassicSimilarity], result of:
            0.007815667 = score(doc=101,freq=1.0), product of:
              0.04222055 = queryWeight, product of:
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.017818525 = queryNorm
              0.18511525 = fieldWeight in 101, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
          0.014438624 = weight(abstract_txt:information in 101) [ClassicSimilarity], result of:
            0.014438624 = score(doc=101,freq=3.0), product of:
              0.04407476 = queryWeight, product of:
                1.0217227 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.017818525 = queryNorm
              0.32759392 = fieldWeight in 101, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
          0.02313376 = weight(abstract_txt:more in 101) [ClassicSimilarity], result of:
            0.02313376 = score(doc=101,freq=1.0), product of:
              0.08703836 = queryWeight, product of:
                1.4357982 = boost
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.017818525 = queryNorm
              0.2657881 = fieldWeight in 101, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
          0.08754611 = weight(abstract_txt:engines in 101) [ClassicSimilarity], result of:
            0.08754611 = score(doc=101,freq=1.0), product of:
              0.21136728 = queryWeight, product of:
                2.2374685 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.017818525 = queryNorm
              0.41418952 = fieldWeight in 101, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
          0.22571068 = weight(abstract_txt:sophisticated in 101) [ClassicSimilarity], result of:
            0.22571068 = score(doc=101,freq=2.0), product of:
              0.31543115 = queryWeight, product of:
                2.733319 = boost
                6.4765315 = idf(docFreq=184, maxDocs=44218)
                0.017818525 = queryNorm
              0.7155624 = fieldWeight in 101, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.4765315 = idf(docFreq=184, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
          0.16821012 = weight(abstract_txt:promising in 101) [ClassicSimilarity], result of:
            0.16821012 = score(doc=101,freq=1.0), product of:
              0.32667404 = queryWeight, product of:
                2.7816043 = boost
                6.590942 = idf(docFreq=164, maxDocs=44218)
                0.017818525 = queryNorm
              0.5149173 = fieldWeight in 101, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.590942 = idf(docFreq=164, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
          0.057516098 = weight(abstract_txt:search in 101) [ClassicSimilarity], result of:
            0.057516098 = score(doc=101,freq=1.0), product of:
              0.20125629 = queryWeight, product of:
                3.087648 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.017818525 = queryNorm
              0.28578535 = fieldWeight in 101, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.078125 = fieldNorm(doc=101)
        0.46666667 = coord(7/15)
    
  2. Entlich, R.: FAQ: Image Search Engines (2001) 0.25
    0.25169334 = sum of:
      0.25169334 = product of:
        0.5393429 = sum of:
          0.013537133 = weight(abstract_txt:that in 155) [ClassicSimilarity], result of:
            0.013537133 = score(doc=155,freq=3.0), product of:
              0.04222055 = queryWeight, product of:
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.017818525 = queryNorm
              0.320629 = fieldWeight in 155, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
          0.008336143 = weight(abstract_txt:information in 155) [ClassicSimilarity], result of:
            0.008336143 = score(doc=155,freq=1.0), product of:
              0.04407476 = queryWeight, product of:
                1.0217227 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.017818525 = queryNorm
              0.18913643 = fieldWeight in 155, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
          0.02313376 = weight(abstract_txt:more in 155) [ClassicSimilarity], result of:
            0.02313376 = score(doc=155,freq=1.0), product of:
              0.08703836 = queryWeight, product of:
                1.4357982 = boost
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.017818525 = queryNorm
              0.2657881 = fieldWeight in 155, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
          0.031032175 = weight(abstract_txt:they in 155) [ClassicSimilarity], result of:
            0.031032175 = score(doc=155,freq=1.0), product of:
              0.10586555 = queryWeight, product of:
                1.5834901 = boost
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.017818525 = queryNorm
              0.29312816 = fieldWeight in 155, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
          0.17509222 = weight(abstract_txt:engines in 155) [ClassicSimilarity], result of:
            0.17509222 = score(doc=155,freq=4.0), product of:
              0.21136728 = queryWeight, product of:
                2.2374685 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.017818525 = queryNorm
              0.82837903 = fieldWeight in 155, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
          0.15960154 = weight(abstract_txt:sophisticated in 155) [ClassicSimilarity], result of:
            0.15960154 = score(doc=155,freq=1.0), product of:
              0.31543115 = queryWeight, product of:
                2.733319 = boost
                6.4765315 = idf(docFreq=184, maxDocs=44218)
                0.017818525 = queryNorm
              0.505979 = fieldWeight in 155, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.4765315 = idf(docFreq=184, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
          0.12860991 = weight(abstract_txt:search in 155) [ClassicSimilarity], result of:
            0.12860991 = score(doc=155,freq=5.0), product of:
              0.20125629 = queryWeight, product of:
                3.087648 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.017818525 = queryNorm
              0.63903546 = fieldWeight in 155, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.078125 = fieldNorm(doc=155)
        0.46666667 = coord(7/15)
    
  3. Drabenstott, K.M.: Web search strategies (2000) 0.24
    0.23602387 = sum of:
      0.23602387 = product of:
        0.50576544 = sum of:
          0.015315519 = weight(abstract_txt:that in 1188) [ClassicSimilarity], result of:
            0.015315519 = score(doc=1188,freq=6.0), product of:
              0.04222055 = queryWeight, product of:
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.017818525 = queryNorm
              0.36275032 = fieldWeight in 1188, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.006668914 = weight(abstract_txt:information in 1188) [ClassicSimilarity], result of:
            0.006668914 = score(doc=1188,freq=1.0), product of:
              0.04407476 = queryWeight, product of:
                1.0217227 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.017818525 = queryNorm
              0.15130915 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.042999443 = weight(abstract_txt:they in 1188) [ClassicSimilarity], result of:
            0.042999443 = score(doc=1188,freq=3.0), product of:
              0.10586555 = queryWeight, product of:
                1.5834901 = boost
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.017818525 = queryNorm
              0.4061703 = fieldWeight in 1188, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.09904712 = weight(abstract_txt:engines in 1188) [ClassicSimilarity], result of:
            0.09904712 = score(doc=1188,freq=2.0), product of:
              0.21136728 = queryWeight, product of:
                2.2374685 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.017818525 = queryNorm
              0.46860194 = fieldWeight in 1188, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.07702224 = weight(abstract_txt:finding in 1188) [ClassicSimilarity], result of:
            0.07702224 = score(doc=1188,freq=1.0), product of:
              0.2251977 = queryWeight, product of:
                2.309511 = boost
                5.4723287 = idf(docFreq=504, maxDocs=44218)
                0.017818525 = queryNorm
              0.34202054 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4723287 = idf(docFreq=504, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.13456811 = weight(abstract_txt:promising in 1188) [ClassicSimilarity], result of:
            0.13456811 = score(doc=1188,freq=1.0), product of:
              0.32667404 = queryWeight, product of:
                2.7816043 = boost
                6.590942 = idf(docFreq=164, maxDocs=44218)
                0.017818525 = queryNorm
              0.41193387 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.590942 = idf(docFreq=164, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.13014407 = weight(abstract_txt:search in 1188) [ClassicSimilarity], result of:
            0.13014407 = score(doc=1188,freq=8.0), product of:
              0.20125629 = queryWeight, product of:
                3.087648 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.017818525 = queryNorm
              0.6466584 = fieldWeight in 1188, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
        0.46666667 = coord(7/15)
    
  4. Hoenkamp, E.: Unitary operators on the document space (2003) 0.22
    0.21898356 = sum of:
      0.21898356 = product of:
        0.46925047 = sum of:
          0.006252534 = weight(abstract_txt:that in 3457) [ClassicSimilarity], result of:
            0.006252534 = score(doc=3457,freq=1.0), product of:
              0.04222055 = queryWeight, product of:
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.017818525 = queryNorm
              0.1480922 = fieldWeight in 3457, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
          0.026172863 = weight(abstract_txt:more in 3457) [ClassicSimilarity], result of:
            0.026172863 = score(doc=3457,freq=2.0), product of:
              0.08703836 = queryWeight, product of:
                1.4357982 = boost
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.017818525 = queryNorm
              0.30070493 = fieldWeight in 3457, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
          0.035108898 = weight(abstract_txt:they in 3457) [ClassicSimilarity], result of:
            0.035108898 = score(doc=3457,freq=2.0), product of:
              0.10586555 = queryWeight, product of:
                1.5834901 = boost
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.017818525 = queryNorm
              0.33163667 = fieldWeight in 3457, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.7520406 = idf(docFreq=2820, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
          0.07003689 = weight(abstract_txt:engines in 3457) [ClassicSimilarity], result of:
            0.07003689 = score(doc=3457,freq=1.0), product of:
              0.21136728 = queryWeight, product of:
                2.2374685 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.017818525 = queryNorm
              0.3313516 = fieldWeight in 3457, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
          0.13203916 = weight(abstract_txt:want in 3457) [ClassicSimilarity], result of:
            0.13203916 = score(doc=3457,freq=1.0), product of:
              0.3225683 = queryWeight, product of:
                2.764069 = boost
                6.5493927 = idf(docFreq=171, maxDocs=44218)
                0.017818525 = queryNorm
              0.40933704 = fieldWeight in 3457, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5493927 = idf(docFreq=171, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
          0.13456811 = weight(abstract_txt:promising in 3457) [ClassicSimilarity], result of:
            0.13456811 = score(doc=3457,freq=1.0), product of:
              0.32667404 = queryWeight, product of:
                2.7816043 = boost
                6.590942 = idf(docFreq=164, maxDocs=44218)
                0.017818525 = queryNorm
              0.41193387 = fieldWeight in 3457, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.590942 = idf(docFreq=164, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
          0.06507204 = weight(abstract_txt:search in 3457) [ClassicSimilarity], result of:
            0.06507204 = score(doc=3457,freq=2.0), product of:
              0.20125629 = queryWeight, product of:
                3.087648 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.017818525 = queryNorm
              0.3233292 = fieldWeight in 3457, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0625 = fieldNorm(doc=3457)
        0.46666667 = coord(7/15)
    
  5. Oßwald, A.: Intelligent gateways : functions for the benefit of the electronic library (1993) 0.22
    0.21627268 = sum of:
      0.21627268 = product of:
        0.8110225 = sum of:
          0.0233412 = weight(abstract_txt:information in 8514) [ClassicSimilarity], result of:
            0.0233412 = score(doc=8514,freq=4.0), product of:
              0.04407476 = queryWeight, product of:
                1.0217227 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.017818525 = queryNorm
              0.529582 = fieldWeight in 8514, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.109375 = fieldNorm(doc=8514)
          0.032387268 = weight(abstract_txt:more in 8514) [ClassicSimilarity], result of:
            0.032387268 = score(doc=8514,freq=1.0), product of:
              0.08703836 = queryWeight, product of:
                1.4357982 = boost
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.017818525 = queryNorm
              0.37210336 = fieldWeight in 8514, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.402088 = idf(docFreq=4002, maxDocs=44218)
                0.109375 = fieldNorm(doc=8514)
          0.23106852 = weight(abstract_txt:want in 8514) [ClassicSimilarity], result of:
            0.23106852 = score(doc=8514,freq=1.0), product of:
              0.3225683 = queryWeight, product of:
                2.764069 = boost
                6.5493927 = idf(docFreq=171, maxDocs=44218)
                0.017818525 = queryNorm
              0.7163398 = fieldWeight in 8514, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5493927 = idf(docFreq=171, maxDocs=44218)
                0.109375 = fieldNorm(doc=8514)
          0.52422553 = weight(abstract_txt:miss in 8514) [ClassicSimilarity], result of:
            0.52422553 = score(doc=8514,freq=1.0), product of:
              0.5569377 = queryWeight, product of:
                3.6319623 = boost
                8.6058445 = idf(docFreq=21, maxDocs=44218)
                0.017818525 = queryNorm
              0.9412643 = fieldWeight in 8514, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.6058445 = idf(docFreq=21, maxDocs=44218)
                0.109375 = fieldNorm(doc=8514)
        0.26666668 = coord(4/15)