Search (133 results, page 1 of 7)

  • × language_ss:"e"
  • × theme_ss:"Citation indexing"
  • × theme_ss:"Informetrie"
  • × type_ss:"a"
  1. Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009) 0.03
    0.028283251 = product of:
      0.056566503 = sum of:
        0.056566503 = sum of:
          0.003609657 = weight(_text_:s in 2763) [ClassicSimilarity], result of:
            0.003609657 = score(doc=2763,freq=2.0), product of:
              0.05008241 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046063907 = queryNorm
              0.072074346 = fieldWeight in 2763, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046875 = fieldNorm(doc=2763)
          0.052956846 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
            0.052956846 = score(doc=2763,freq=4.0), product of:
              0.16130796 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046063907 = queryNorm
              0.32829654 = fieldWeight in 2763, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=2763)
      0.5 = coord(1/2)
    
    Date
    22. 3.2009 19:22:35
    Source
    Journal of the American Society for Information Science and Technology. 60(2009) no.4, S.858-862
  2. Nicolaisen, J.: Citation analysis (2007) 0.02
    0.024964094 = product of:
      0.04992819 = sum of:
        0.04992819 = product of:
          0.09985638 = sum of:
            0.09985638 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
              0.09985638 = score(doc=6091,freq=2.0), product of:
                0.16130796 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046063907 = queryNorm
                0.61904186 = fieldWeight in 6091, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.125 = fieldNorm(doc=6091)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    13. 7.2008 19:53:22
  3. Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001) 0.02
    0.02206535 = product of:
      0.0441307 = sum of:
        0.0441307 = product of:
          0.0882614 = sum of:
            0.0882614 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
              0.0882614 = score(doc=3925,freq=4.0), product of:
                0.16130796 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046063907 = queryNorm
                0.54716086 = fieldWeight in 3925, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3925)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 7.2006 15:22:28
  4. Chan, H.C.; Kim, H.-W.; Tan, W.C.: Information systems citation patterns from International Conference on Information Systems articles (2006) 0.02
    0.0205279 = product of:
      0.0410558 = sum of:
        0.0410558 = sum of:
          0.003609657 = weight(_text_:s in 201) [ClassicSimilarity], result of:
            0.003609657 = score(doc=201,freq=2.0), product of:
              0.05008241 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046063907 = queryNorm
              0.072074346 = fieldWeight in 201, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046875 = fieldNorm(doc=201)
          0.03744614 = weight(_text_:22 in 201) [ClassicSimilarity], result of:
            0.03744614 = score(doc=201,freq=2.0), product of:
              0.16130796 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046063907 = queryNorm
              0.23214069 = fieldWeight in 201, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=201)
      0.5 = coord(1/2)
    
    Date
    3. 1.2007 17:22:03
    Source
    Journal of the American Society for Information Science and Technology. 57(2006) no.9, S.1263-1274
  5. Mingers, J.; Burrell, Q.L.: Modeling citation behavior in Management Science journals (2006) 0.02
    0.0205279 = product of:
      0.0410558 = sum of:
        0.0410558 = sum of:
          0.003609657 = weight(_text_:s in 994) [ClassicSimilarity], result of:
            0.003609657 = score(doc=994,freq=2.0), product of:
              0.05008241 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046063907 = queryNorm
              0.072074346 = fieldWeight in 994, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046875 = fieldNorm(doc=994)
          0.03744614 = weight(_text_:22 in 994) [ClassicSimilarity], result of:
            0.03744614 = score(doc=994,freq=2.0), product of:
              0.16130796 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046063907 = queryNorm
              0.23214069 = fieldWeight in 994, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=994)
      0.5 = coord(1/2)
    
    Date
    26.12.2007 19:22:05
    Source
    Information processing and management. 42(2006) no.6, S.1451-1464
  6. Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003) 0.01
    0.0136852665 = product of:
      0.027370533 = sum of:
        0.027370533 = sum of:
          0.002406438 = weight(_text_:s in 5171) [ClassicSimilarity], result of:
            0.002406438 = score(doc=5171,freq=2.0), product of:
              0.05008241 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.046063907 = queryNorm
              0.048049565 = fieldWeight in 5171, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.03125 = fieldNorm(doc=5171)
          0.024964094 = weight(_text_:22 in 5171) [ClassicSimilarity], result of:
            0.024964094 = score(doc=5171,freq=2.0), product of:
              0.16130796 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046063907 = queryNorm
              0.15476047 = fieldWeight in 5171, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.03125 = fieldNorm(doc=5171)
      0.5 = coord(1/2)
    
    Date
    9. 7.2006 10:22:35
    Source
    Journal of the American Society for Information Science and technology. 54(2003) no.6, S.549-568
  7. Small, H.; Sweeney, E.: Clustering the Science Citation Index using co-citations (1985) 0.00
    0.002406438 = product of:
      0.004812876 = sum of:
        0.004812876 = product of:
          0.009625752 = sum of:
            0.009625752 = weight(_text_:s in 1064) [ClassicSimilarity], result of:
              0.009625752 = score(doc=1064,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.19219826 = fieldWeight in 1064, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.125 = fieldNorm(doc=1064)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 7(1985), S.391-409
  8. Garfield, E.: Is citation analysis a legitime evaluation tool? (1979) 0.00
    0.002406438 = product of:
      0.004812876 = sum of:
        0.004812876 = product of:
          0.009625752 = sum of:
            0.009625752 = weight(_text_:s in 1086) [ClassicSimilarity], result of:
              0.009625752 = score(doc=1086,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.19219826 = fieldWeight in 1086, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.125 = fieldNorm(doc=1086)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 1(1979), S.359-375
  9. Vinkler, P.: ¬A quasi-quantitative citation model (1987) 0.00
    0.002406438 = product of:
      0.004812876 = sum of:
        0.004812876 = product of:
          0.009625752 = sum of:
            0.009625752 = weight(_text_:s in 2299) [ClassicSimilarity], result of:
              0.009625752 = score(doc=2299,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.19219826 = fieldWeight in 2299, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.125 = fieldNorm(doc=2299)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 12(1987) nos.1-2, S.47-72
  10. Cozzens, S.E.: What do citations count? : the rhetoric-first model (1989) 0.00
    0.002406438 = product of:
      0.004812876 = sum of:
        0.004812876 = product of:
          0.009625752 = sum of:
            0.009625752 = weight(_text_:s in 2828) [ClassicSimilarity], result of:
              0.009625752 = score(doc=2828,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.19219826 = fieldWeight in 2828, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.125 = fieldNorm(doc=2828)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 15(1989), S.437-447
  11. Peritz, B.C.: Citation characteristics in library science : some further results from a bibliometric survey (1981) 0.00
    0.002406438 = product of:
      0.004812876 = sum of:
        0.004812876 = product of:
          0.009625752 = sum of:
            0.009625752 = weight(_text_:s in 4170) [ClassicSimilarity], result of:
              0.009625752 = score(doc=4170,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.19219826 = fieldWeight in 4170, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.125 = fieldNorm(doc=4170)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Library research. 3(1981), S.47-65
  12. Peritz, B.C.: ¬A classification of citation roles for the social sciences and related fields (1983) 0.00
    0.0021056333 = product of:
      0.0042112665 = sum of:
        0.0042112665 = product of:
          0.008422533 = sum of:
            0.008422533 = weight(_text_:s in 3073) [ClassicSimilarity], result of:
              0.008422533 = score(doc=3073,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.16817348 = fieldWeight in 3073, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.109375 = fieldNorm(doc=3073)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 5(1983), S.303-312
  13. Shapiro, F.R.: Origins of bibliometrics, citation indexing and citation analysis : the neglected legal literature (1992) 0.00
    0.0021056333 = product of:
      0.0042112665 = sum of:
        0.0042112665 = product of:
          0.008422533 = sum of:
            0.008422533 = weight(_text_:s in 4262) [ClassicSimilarity], result of:
              0.008422533 = score(doc=4262,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.16817348 = fieldWeight in 4262, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.109375 = fieldNorm(doc=4262)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science. 43(1992), S.337-339
  14. McCain, K.W.: Co-cited author mapping as a valid representation of intellectual structure (1986) 0.00
    0.0021056333 = product of:
      0.0042112665 = sum of:
        0.0042112665 = product of:
          0.008422533 = sum of:
            0.008422533 = weight(_text_:s in 5505) [ClassicSimilarity], result of:
              0.008422533 = score(doc=5505,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.16817348 = fieldWeight in 5505, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.109375 = fieldNorm(doc=5505)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science. 37(1986), S.111-122
  15. Garfield, E.; Sher, I.H.: New factors in the evaluation of scientific literature literature through citation indexing (1963) 0.00
    0.0021056333 = product of:
      0.0042112665 = sum of:
        0.0042112665 = product of:
          0.008422533 = sum of:
            0.008422533 = weight(_text_:s in 8242) [ClassicSimilarity], result of:
              0.008422533 = score(doc=8242,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.16817348 = fieldWeight in 8242, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.109375 = fieldNorm(doc=8242)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    American documentation. 14(1963) no.3, S.195-201
  16. He, Y.; Hui, S.C.: Mining a web database for author cocitation analysis (2002) 0.00
    0.0021056333 = product of:
      0.0042112665 = sum of:
        0.0042112665 = product of:
          0.008422533 = sum of:
            0.008422533 = weight(_text_:s in 2584) [ClassicSimilarity], result of:
              0.008422533 = score(doc=2584,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.16817348 = fieldWeight in 2584, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.109375 = fieldNorm(doc=2584)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Information processing and management. 38(2002) no.4, S.491-508
  17. Cronin, B.: Bibliometrics and beyond : some thoughts on web-based citation analysis (2001) 0.00
    0.0021056333 = product of:
      0.0042112665 = sum of:
        0.0042112665 = product of:
          0.008422533 = sum of:
            0.008422533 = weight(_text_:s in 3890) [ClassicSimilarity], result of:
              0.008422533 = score(doc=3890,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.16817348 = fieldWeight in 3890, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.109375 = fieldNorm(doc=3890)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of information science. 27(2001) no.1, S.1-7
  18. Larsen, B.: Exploiting citation overlaps for information retrieval : generating a boomerang effect from the network of scientific papers (2002) 0.00
    0.0018048285 = product of:
      0.003609657 = sum of:
        0.003609657 = product of:
          0.007219314 = sum of:
            0.007219314 = weight(_text_:s in 4175) [ClassicSimilarity], result of:
              0.007219314 = score(doc=4175,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.14414869 = fieldWeight in 4175, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.09375 = fieldNorm(doc=4175)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 54(2002) no.2, S.155-178
  19. Kurtz, M.J.; Eichhorn, G.; Accomazzi, A.; Grant, C.; Demleitner, M.; Henneken, E.; Murray, S.S.: ¬The effect of use and access on citations (2005) 0.00
    0.0017016088 = product of:
      0.0034032175 = sum of:
        0.0034032175 = product of:
          0.006806435 = sum of:
            0.006806435 = weight(_text_:s in 1064) [ClassicSimilarity], result of:
              0.006806435 = score(doc=1064,freq=4.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.1359047 = fieldWeight in 1064, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=1064)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    It has been shown (Lawrence, S. (2001). Online or invisible? Nature, 411, 521) that journal articles which have been posted without charge on the internet are more heavily cited than those which have not been. Using data from the NASA Astrophysics Data System (ads.harvard.edu) and from the ArXiv e-print archive at Cornell University (arXiv.org) we examine the causes of this effect.
    Source
    Information processing and management. 41(2005) no.6, S.1395-1402
  20. Vinkler, P.: Relationships between the rate of scientific development and citations : the chance for citedness model (1996) 0.00
    0.0015040238 = product of:
      0.0030080476 = sum of:
        0.0030080476 = product of:
          0.006016095 = sum of:
            0.006016095 = weight(_text_:s in 5077) [ClassicSimilarity], result of:
              0.006016095 = score(doc=5077,freq=2.0), product of:
                0.05008241 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046063907 = queryNorm
                0.120123915 = fieldWeight in 5077, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.078125 = fieldNorm(doc=5077)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Scientometrics. 35(1996) no.3, S.375-386