Search (55 results, page 1 of 3)

  • × author_ss:"Egghe, L."
  1. Egghe, L.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004) 0.03
    0.029471014 = product of:
      0.058942027 = sum of:
        0.04717497 = weight(_text_:processing in 2558) [ClassicSimilarity], result of:
          0.04717497 = score(doc=2558,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.26835677 = fieldWeight in 2558, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.046875 = fieldNorm(doc=2558)
        0.011767056 = product of:
          0.035301168 = sum of:
            0.035301168 = weight(_text_:22 in 2558) [ClassicSimilarity], result of:
              0.035301168 = score(doc=2558,freq=2.0), product of:
                0.15206799 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043425296 = queryNorm
                0.23214069 = fieldWeight in 2558, 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=2558)
          0.33333334 = coord(1/3)
      0.5 = coord(2/4)
    
    Date
    14. 8.2004 19:17:22
    Source
    Information processing and management. 40(2004) no.1, S.21-30
  2. Egghe, L.: Expansion of the field of informetrics : the second special issue (2006) 0.02
    0.023587486 = product of:
      0.09434994 = sum of:
        0.09434994 = weight(_text_:processing in 7119) [ClassicSimilarity], result of:
          0.09434994 = score(doc=7119,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.53671354 = fieldWeight in 7119, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.09375 = fieldNorm(doc=7119)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 42(2006) no.6, S.1405-1407
  3. Egghe, L.: Expansion of the field of informetrics : origins and consequences (2005) 0.02
    0.023587486 = product of:
      0.09434994 = sum of:
        0.09434994 = weight(_text_:processing in 1910) [ClassicSimilarity], result of:
          0.09434994 = score(doc=1910,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.53671354 = fieldWeight in 1910, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.09375 = fieldNorm(doc=1910)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 41(2005) no.6, S.1311-1316
  4. Egghe, L.; Rousseau, R.: Introduction to informetrics : quantitative methods in library, documentation and information science (1990) 0.02
    0.017202197 = product of:
      0.06880879 = sum of:
        0.06880879 = product of:
          0.103213176 = sum of:
            0.06165464 = weight(_text_:science in 1515) [ClassicSimilarity], result of:
              0.06165464 = score(doc=1515,freq=14.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.5389985 = fieldWeight in 1515, product of:
                  3.7416575 = tf(freq=14.0), with freq of:
                    14.0 = termFreq=14.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1515)
            0.04155854 = weight(_text_:29 in 1515) [ClassicSimilarity], result of:
              0.04155854 = score(doc=1515,freq=2.0), product of:
                0.15275662 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.043425296 = queryNorm
                0.27205724 = fieldWeight in 1515, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1515)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    COMPASS
    Information science / Statistical mathematics
    Date
    29. 2.2008 19:02:46
    LCSH
    Information science / Statistical methods
    Library science / Statistical methods
    Subject
    Information science / Statistical mathematics
    Information science / Statistical methods
    Library science / Statistical methods
  5. Egghe, L.: Existence theorem of the quadruple (P, R, F, M) : precision, recall, fallout and miss (2007) 0.02
    0.016678872 = product of:
      0.06671549 = sum of:
        0.06671549 = weight(_text_:processing in 2011) [ClassicSimilarity], result of:
          0.06671549 = score(doc=2011,freq=4.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.3795138 = fieldWeight in 2011, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.046875 = fieldNorm(doc=2011)
      0.25 = coord(1/4)
    
    Abstract
    In an earlier paper [Egghe, L. (2004). A universal method of information retrieval evaluation: the "missing" link M and the universal IR surface. Information Processing and Management, 40, 21-30] we showed that, given an IR system, and if P denotes precision, R recall, F fallout and M miss (re-introduced in the paper mentioned above), we have the following relationship between P, R, F and M: P/(1-P)*(1-R)/R*F/(1-F)*(1-M)/M = 1. In this paper we prove the (more difficult) converse: given any four rational numbers in the interval ]0, 1[ satisfying the above equation, then there exists an IR system such that these four numbers (in any order) are the precision, recall, fallout and miss of this IR system. As a consequence we show that any three rational numbers in ]0, 1[ represent any three measures taken from precision, recall, fallout and miss of a certain IR system. We also show that this result is also true for two numbers instead of three.
    Source
    Information processing and management. 43(2007) no.1, S.265-272
  6. Egghe, L.; Rousseau, R.: ¬A theoretical study of recall and precision using a topological approach to information retrieval (1998) 0.02
    0.01572499 = product of:
      0.06289996 = sum of:
        0.06289996 = weight(_text_:processing in 3267) [ClassicSimilarity], result of:
          0.06289996 = score(doc=3267,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.35780904 = fieldWeight in 3267, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.0625 = fieldNorm(doc=3267)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 34(1998) nos.2/3, S.191-218
  7. Egghe, L.; Rousseau, R.: ¬An h-index weighted by citation impact (2008) 0.02
    0.01572499 = product of:
      0.06289996 = sum of:
        0.06289996 = weight(_text_:processing in 695) [ClassicSimilarity], result of:
          0.06289996 = score(doc=695,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.35780904 = fieldWeight in 695, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.0625 = fieldNorm(doc=695)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 44(2008) no.2, S.770-780
  8. Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012) 0.02
    0.015354276 = product of:
      0.061417103 = sum of:
        0.061417103 = product of:
          0.092125654 = sum of:
            0.033290375 = weight(_text_:science in 4992) [ClassicSimilarity], result of:
              0.033290375 = score(doc=4992,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.2910318 = fieldWeight in 4992, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.078125 = fieldNorm(doc=4992)
            0.058835283 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
              0.058835283 = score(doc=4992,freq=2.0), product of:
                0.15206799 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043425296 = queryNorm
                0.38690117 = fieldWeight in 4992, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.078125 = fieldNorm(doc=4992)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Date
    14. 2.2012 12:53:22
    Source
    Journal of the American Society for Information Science and Technology. 63(2012) no.2, S.429
  9. Egghe, L.: Vector retrieval, fuzzy retrieval and the universal fuzzy IR surface for IR evaluation (2004) 0.01
    0.013759367 = product of:
      0.05503747 = sum of:
        0.05503747 = weight(_text_:processing in 2531) [ClassicSimilarity], result of:
          0.05503747 = score(doc=2531,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.3130829 = fieldWeight in 2531, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2531)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 40(2004) no.4, S.603-618
  10. Egghe, L.: ¬The measures precision, recall, fallout and miss as a function of the number of retrieved documents and their mutual interrelations (2008) 0.01
    0.00982812 = product of:
      0.03931248 = sum of:
        0.03931248 = weight(_text_:processing in 2067) [ClassicSimilarity], result of:
          0.03931248 = score(doc=2067,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.22363065 = fieldWeight in 2067, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2067)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 44(2008) no.2, S.856-876
  11. Egghe, L.: Mathematical study of h-index sequences (2009) 0.01
    0.00982812 = product of:
      0.03931248 = sum of:
        0.03931248 = weight(_text_:processing in 4217) [ClassicSimilarity], result of:
          0.03931248 = score(doc=4217,freq=2.0), product of:
            0.175792 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.043425296 = queryNorm
            0.22363065 = fieldWeight in 4217, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4217)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 45(2009) no.2, S.288-297
  12. Egghe, L.: ¬A noninformetric analysis of the relationship between citation age and journal productivity (2001) 0.01
    0.009265972 = product of:
      0.03706389 = sum of:
        0.03706389 = product of:
          0.055595834 = sum of:
            0.019974224 = weight(_text_:science in 5685) [ClassicSimilarity], result of:
              0.019974224 = score(doc=5685,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.17461908 = fieldWeight in 5685, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5685)
            0.03562161 = weight(_text_:29 in 5685) [ClassicSimilarity], result of:
              0.03562161 = score(doc=5685,freq=2.0), product of:
                0.15275662 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.043425296 = queryNorm
                0.23319192 = fieldWeight in 5685, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5685)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Date
    29. 9.2001 13:59:34
    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.5, S.371-377
  13. Egghe, L.: Influence of adding or deleting items and sources on the h-index (2010) 0.01
    0.009265972 = product of:
      0.03706389 = sum of:
        0.03706389 = product of:
          0.055595834 = sum of:
            0.019974224 = weight(_text_:science in 3336) [ClassicSimilarity], result of:
              0.019974224 = score(doc=3336,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.17461908 = fieldWeight in 3336, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3336)
            0.03562161 = weight(_text_:29 in 3336) [ClassicSimilarity], result of:
              0.03562161 = score(doc=3336,freq=2.0), product of:
                0.15275662 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.043425296 = queryNorm
                0.23319192 = fieldWeight in 3336, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3336)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Date
    31. 5.2010 15:02:29
    Source
    Journal of the American Society for Information Science and Technology. 61(2010) no.2, S.370-373
  14. Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996) 0.01
    0.009212566 = product of:
      0.036850262 = sum of:
        0.036850262 = product of:
          0.05527539 = sum of:
            0.019974224 = weight(_text_:science in 7659) [ClassicSimilarity], result of:
              0.019974224 = score(doc=7659,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.17461908 = fieldWeight in 7659, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.046875 = fieldNorm(doc=7659)
            0.035301168 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
              0.035301168 = score(doc=7659,freq=2.0), product of:
                0.15206799 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043425296 = queryNorm
                0.23214069 = fieldWeight in 7659, 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=7659)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Source
    Journal of information science. 22(1996) no.3, S.165-170
  15. Egghe, L.: Properties of the n-overlap vector and n-overlap similarity theory (2006) 0.01
    0.007721644 = product of:
      0.030886576 = sum of:
        0.030886576 = product of:
          0.046329863 = sum of:
            0.016645188 = weight(_text_:science in 194) [ClassicSimilarity], result of:
              0.016645188 = score(doc=194,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.1455159 = fieldWeight in 194, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=194)
            0.029684676 = weight(_text_:29 in 194) [ClassicSimilarity], result of:
              0.029684676 = score(doc=194,freq=2.0), product of:
                0.15275662 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.043425296 = queryNorm
                0.19432661 = fieldWeight in 194, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=194)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Date
    3. 1.2007 14:26:29
    Source
    Journal of the American Society for Information Science and Technology. 57(2006) no.9, S.1165-1177
  16. Egghe, L.: Untangling Herdan's law and Heaps' law : mathematical and informetric arguments (2007) 0.01
    0.007721644 = product of:
      0.030886576 = sum of:
        0.030886576 = product of:
          0.046329863 = sum of:
            0.016645188 = weight(_text_:science in 271) [ClassicSimilarity], result of:
              0.016645188 = score(doc=271,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.1455159 = fieldWeight in 271, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=271)
            0.029684676 = weight(_text_:29 in 271) [ClassicSimilarity], result of:
              0.029684676 = score(doc=271,freq=2.0), product of:
                0.15275662 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.043425296 = queryNorm
                0.19432661 = fieldWeight in 271, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=271)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Date
    29. 4.2007 19:51:08
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.5, S.702-709
  17. Egghe, L.: Little science, big science and beyond (1994) 0.01
    0.006727073 = product of:
      0.026908292 = sum of:
        0.026908292 = product of:
          0.08072487 = sum of:
            0.08072487 = weight(_text_:science in 6883) [ClassicSimilarity], result of:
              0.08072487 = score(doc=6883,freq=6.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.7057147 = fieldWeight in 6883, product of:
                  2.4494898 = tf(freq=6.0), with freq of:
                    6.0 = termFreq=6.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6883)
          0.33333334 = coord(1/3)
      0.25 = coord(1/4)
    
    Abstract
    Discusses the quality of bibliometrics, informetrics and scientometrics research, intradisciplinary communication and science policy
  18. Egghe, L.: Special features of the author - publication relationship and a new explanation of Lotka's law based on convolution theory (1994) 0.00
    0.0033290375 = product of:
      0.01331615 = sum of:
        0.01331615 = product of:
          0.03994845 = sum of:
            0.03994845 = weight(_text_:science in 5068) [ClassicSimilarity], result of:
              0.03994845 = score(doc=5068,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.34923816 = fieldWeight in 5068, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.09375 = fieldNorm(doc=5068)
          0.33333334 = coord(1/3)
      0.25 = coord(1/4)
    
    Source
    Journal of the American Society for Information Science. 45(1994) no.6, S.422-427
  19. Egghe, L.: Note on a possible decomposition of the h-Index (2013) 0.00
    0.0033290375 = product of:
      0.01331615 = sum of:
        0.01331615 = product of:
          0.03994845 = sum of:
            0.03994845 = weight(_text_:science in 683) [ClassicSimilarity], result of:
              0.03994845 = score(doc=683,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.34923816 = fieldWeight in 683, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.09375 = fieldNorm(doc=683)
          0.33333334 = coord(1/3)
      0.25 = coord(1/4)
    
    Source
    Journal of the American Society for Information Science and Technology. 64(2013) no.4, S.871
  20. Egghe, L.: ¬The Hirsch index and related impact measures (2010) 0.00
    0.0033290375 = product of:
      0.01331615 = sum of:
        0.01331615 = product of:
          0.03994845 = sum of:
            0.03994845 = weight(_text_:science in 1597) [ClassicSimilarity], result of:
              0.03994845 = score(doc=1597,freq=2.0), product of:
                0.11438741 = queryWeight, product of:
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.043425296 = queryNorm
                0.34923816 = fieldWeight in 1597, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.6341193 = idf(docFreq=8627, maxDocs=44218)
                  0.09375 = fieldNorm(doc=1597)
          0.33333334 = coord(1/3)
      0.25 = coord(1/4)
    
    Source
    Annual review of information science and technology. 44(2010) no.1, S.65-114