Search (20 results, page 1 of 1)

  • × theme_ss:"Citation indexing"
  • × theme_ss:"Informetrie"
  1. Nicolaisen, J.: Citation analysis (2007) 0.18
    0.17598873 = product of:
      0.35197747 = sum of:
        0.35197747 = sum of:
          0.2549574 = weight(_text_:2007 in 6091) [ClassicSimilarity], result of:
            0.2549574 = score(doc=6091,freq=5.0), product of:
              0.20205033 = queryWeight, product of:
                4.514535 = idf(docFreq=1315, maxDocs=44218)
                0.044755515 = queryNorm
              1.261851 = fieldWeight in 6091, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.514535 = idf(docFreq=1315, maxDocs=44218)
                0.125 = fieldNorm(doc=6091)
          0.09702007 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
            0.09702007 = score(doc=6091,freq=2.0), product of:
              0.15672618 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.044755515 = 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)
    
    Date
    13. 7.2008 19:53:22
    Source
    Annual review of information science and technology. 41(2007), S.xxx-xxx
    Year
    2007
  2. Bensman, S.J.: Garfield and the impact factors (2007) 0.06
    0.06373935 = product of:
      0.1274787 = sum of:
        0.1274787 = product of:
          0.2549574 = sum of:
            0.2549574 = weight(_text_:2007 in 4680) [ClassicSimilarity], result of:
              0.2549574 = score(doc=4680,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                1.261851 = fieldWeight in 4680, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.125 = fieldNorm(doc=4680)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Annual review of information science and technology. 41(2007), S.xxx-xxx
    Year
    2007
  3. Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009) 0.06
    0.05596056 = product of:
      0.11192112 = sum of:
        0.11192112 = sum of:
          0.06046845 = weight(_text_:2007 in 2763) [ClassicSimilarity], result of:
            0.06046845 = score(doc=2763,freq=2.0), product of:
              0.20205033 = queryWeight, product of:
                4.514535 = idf(docFreq=1315, maxDocs=44218)
                0.044755515 = queryNorm
              0.2992742 = fieldWeight in 2763, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.514535 = idf(docFreq=1315, maxDocs=44218)
                0.046875 = fieldNorm(doc=2763)
          0.051452663 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
            0.051452663 = score(doc=2763,freq=4.0), product of:
              0.15672618 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.044755515 = 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
  4. González, L.; Campanario, J.M.: Structure of the impact factor of journals included in the Social Sciences Citation Index : citations from documents labeled "Editorial Material" (2007) 0.02
    0.023902256 = product of:
      0.047804512 = sum of:
        0.047804512 = product of:
          0.095609024 = sum of:
            0.095609024 = weight(_text_:2007 in 75) [ClassicSimilarity], result of:
              0.095609024 = score(doc=75,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.47319412 = fieldWeight in 75, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.046875 = fieldNorm(doc=75)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.2, S.252-262
    Year
    2007
  5. Shibata, N.; Kajikawa, Y.; Matsushima, K.: Topological analysis of citation networks to discover the future core articles (2007) 0.02
    0.023902256 = product of:
      0.047804512 = sum of:
        0.047804512 = product of:
          0.095609024 = sum of:
            0.095609024 = weight(_text_:2007 in 286) [ClassicSimilarity], result of:
              0.095609024 = score(doc=286,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.47319412 = fieldWeight in 286, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.046875 = fieldNorm(doc=286)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.6, S.872-882
    Year
    2007
  6. Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001) 0.02
    0.021438608 = product of:
      0.042877216 = sum of:
        0.042877216 = product of:
          0.08575443 = sum of:
            0.08575443 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
              0.08575443 = score(doc=3925,freq=4.0), product of:
                0.15672618 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044755515 = 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
  7. Leydesdorff, L.: Visualization of the citation impact environments of scientific journals : an online mapping exercise (2007) 0.02
    0.019918546 = product of:
      0.039837092 = sum of:
        0.039837092 = product of:
          0.079674184 = sum of:
            0.079674184 = weight(_text_:2007 in 82) [ClassicSimilarity], result of:
              0.079674184 = score(doc=82,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.39432842 = fieldWeight in 82, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=82)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.1, S.25-38
    Year
    2007
  8. Aström, F.: Changes in the LIS research front : time-sliced cocitation analyses of LIS journal articles, 1990-2004 (2007) 0.02
    0.019918546 = product of:
      0.039837092 = sum of:
        0.039837092 = product of:
          0.079674184 = sum of:
            0.079674184 = weight(_text_:2007 in 329) [ClassicSimilarity], result of:
              0.079674184 = score(doc=329,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.39432842 = fieldWeight in 329, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=329)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.7, S.947-957
    Year
    2007
  9. Kousha, K.; Thelwall, M.: Google Scholar citations and Google Web/URL citations : a multi-discipline exploratory analysis (2007) 0.02
    0.019918546 = product of:
      0.039837092 = sum of:
        0.039837092 = product of:
          0.079674184 = sum of:
            0.079674184 = weight(_text_:2007 in 337) [ClassicSimilarity], result of:
              0.079674184 = score(doc=337,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.39432842 = fieldWeight in 337, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=337)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.7, S.1055-1065
    Year
    2007
  10. Bornmann, L.; Daniel, H.-D.: Multiple publication on a single research study: does it pay? : The influence of number of research articles on total citation counts in biomedicine (2007) 0.02
    0.019918546 = product of:
      0.039837092 = sum of:
        0.039837092 = product of:
          0.079674184 = sum of:
            0.079674184 = weight(_text_:2007 in 444) [ClassicSimilarity], result of:
              0.079674184 = score(doc=444,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.39432842 = fieldWeight in 444, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=444)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.8, S.1100-1107
    Year
    2007
  11. Zhao, D.; Strotmann, A.: Can citation analysis of Web publications better detect research fronts? (2007) 0.02
    0.019918546 = product of:
      0.039837092 = sum of:
        0.039837092 = product of:
          0.079674184 = sum of:
            0.079674184 = weight(_text_:2007 in 471) [ClassicSimilarity], result of:
              0.079674184 = score(doc=471,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.39432842 = fieldWeight in 471, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=471)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.9, S.1285-1302
    Year
    2007
  12. Johnson, B.; Oppenheim, C.: How socially connected are citers to those that they cite? (2007) 0.02
    0.019918546 = product of:
      0.039837092 = sum of:
        0.039837092 = product of:
          0.079674184 = sum of:
            0.079674184 = weight(_text_:2007 in 839) [ClassicSimilarity], result of:
              0.079674184 = score(doc=839,freq=5.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.39432842 = fieldWeight in 839, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=839)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of documentation. 63(2007) no.5, S.609-637
    Year
    2007
  13. Haridasan, S.; Kulshrestha, V.K.: Citation analysis of scholarly communication in the journal Knowledge Organization (2007) 0.02
    0.018854354 = product of:
      0.037708707 = sum of:
        0.037708707 = product of:
          0.075417414 = sum of:
            0.075417414 = weight(_text_:2007 in 863) [ClassicSimilarity], result of:
              0.075417414 = score(doc=863,freq=7.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.37326053 = fieldWeight in 863, product of:
                  2.6457512 = tf(freq=7.0), with freq of:
                    7.0 = termFreq=7.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.03125 = fieldNorm(doc=863)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Content
    Vgl..: Burton, P.F.: On reading "The banning of books in libraries". In: Library review. 56(2007) no.3, S.197-199.
    Source
    Library review. 56(2007) no.4, S.299-310
    Year
    2007
  14. Boyack, K.W.; Small, H.; Klavans, R.: Improving the accuracy of co-citation clustering using full text (2013) 0.02
    0.015117113 = product of:
      0.030234225 = sum of:
        0.030234225 = product of:
          0.06046845 = sum of:
            0.06046845 = weight(_text_:2007 in 1036) [ClassicSimilarity], result of:
              0.06046845 = score(doc=1036,freq=2.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.2992742 = fieldWeight in 1036, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1036)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Historically, co-citation models have been based only on bibliographic information. Full-text analysis offers the opportunity to significantly improve the quality of the signals upon which these co-citation models are based. In this work we study the effect of reference proximity on the accuracy of co-citation clusters. Using a corpus of 270,521 full text documents from 2007, we compare the results of traditional co-citation clustering using only the bibliographic information to results from co-citation clustering where proximity between reference pairs is factored into the pairwise relationships. We find that accounting for reference proximity from full text can increase the textual coherence (a measure of accuracy) of a co-citation cluster solution by up to 30% over the traditional approach based on bibliographic information.
  15. Leydesdorff, L.; Moya-Anegón, F.de; Guerrero-Bote, V.P.: Journal maps on the basis of Scopus data : a comparison with the Journal Citation Reports of the ISI (2010) 0.01
    0.0125975935 = product of:
      0.025195187 = sum of:
        0.025195187 = product of:
          0.050390374 = sum of:
            0.050390374 = weight(_text_:2007 in 3335) [ClassicSimilarity], result of:
              0.050390374 = score(doc=3335,freq=2.0), product of:
                0.20205033 = queryWeight, product of:
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.044755515 = queryNorm
                0.24939516 = fieldWeight in 3335, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.514535 = idf(docFreq=1315, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=3335)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Using the Scopus dataset (1996-2007) a grand matrix of aggregated journal-journal citations was constructed. This matrix can be compared in terms of the network structures with the matrix contained in the Journal Citation Reports (JCR) of the Institute of Scientific Information (ISI). Because the Scopus database contains a larger number of journals and covers the humanities, one would expect richer maps. However, the matrix is in this case sparser than in the case of the ISI data. This is because of (a) the larger number of journals covered by Scopus and (b) the historical record of citations older than 10 years contained in the ISI database. When the data is highly structured, as in the case of large journals, the maps are comparable, although one may have to vary a threshold (because of the differences in densities). In the case of interdisciplinary journals and journals in the social sciences and humanities, the new database does not add a lot to what is possible with the ISI databases.
  16. Chan, H.C.; Kim, H.-W.; Tan, W.C.: Information systems citation patterns from International Conference on Information Systems articles (2006) 0.01
    0.009095631 = product of:
      0.018191261 = sum of:
        0.018191261 = product of:
          0.036382522 = sum of:
            0.036382522 = weight(_text_:22 in 201) [ClassicSimilarity], result of:
              0.036382522 = score(doc=201,freq=2.0), product of:
                0.15672618 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044755515 = 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)
      0.5 = coord(1/2)
    
    Date
    3. 1.2007 17:22:03
  17. H-Index auch im Web of Science (2008) 0.01
    0.009095631 = product of:
      0.018191261 = sum of:
        0.018191261 = product of:
          0.036382522 = sum of:
            0.036382522 = weight(_text_:22 in 590) [ClassicSimilarity], result of:
              0.036382522 = score(doc=590,freq=2.0), product of:
                0.15672618 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044755515 = queryNorm
                0.23214069 = fieldWeight in 590, 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=590)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    6. 4.2008 19:04:22
  18. Mingers, J.; Burrell, Q.L.: Modeling citation behavior in Management Science journals (2006) 0.01
    0.009095631 = product of:
      0.018191261 = sum of:
        0.018191261 = product of:
          0.036382522 = sum of:
            0.036382522 = weight(_text_:22 in 994) [ClassicSimilarity], result of:
              0.036382522 = score(doc=994,freq=2.0), product of:
                0.15672618 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044755515 = 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)
      0.5 = coord(1/2)
    
    Date
    26.12.2007 19:22:05
  19. Hayer, L.: Lazarsfeld zitiert : eine bibliometrische Analyse (2008) 0.01
    0.007579693 = product of:
      0.015159386 = sum of:
        0.015159386 = product of:
          0.030318772 = sum of:
            0.030318772 = weight(_text_:22 in 1934) [ClassicSimilarity], result of:
              0.030318772 = score(doc=1934,freq=2.0), product of:
                0.15672618 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044755515 = queryNorm
                0.19345059 = fieldWeight in 1934, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=1934)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 6.2008 12:54:12
  20. Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003) 0.01
    0.006063754 = product of:
      0.012127508 = sum of:
        0.012127508 = product of:
          0.024255017 = sum of:
            0.024255017 = weight(_text_:22 in 5171) [ClassicSimilarity], result of:
              0.024255017 = score(doc=5171,freq=2.0), product of:
                0.15672618 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.044755515 = 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)
      0.5 = coord(1/2)
    
    Date
    9. 7.2006 10:22:35