Search (5 results, page 1 of 1)

  • × author_ss:"Egghe, L."
  1. Egghe, L.: Mathematical theories of citation (1998) 0.04
    0.03726713 = product of:
      0.07453426 = sum of:
        0.07453426 = product of:
          0.14906852 = sum of:
            0.14906852 = weight(_text_:light in 5125) [ClassicSimilarity], result of:
              0.14906852 = score(doc=5125,freq=2.0), product of:
                0.2920221 = queryWeight, product of:
                  5.7753086 = idf(docFreq=372, maxDocs=44218)
                  0.050563898 = queryNorm
                0.51047 = fieldWeight in 5125, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  5.7753086 = idf(docFreq=372, maxDocs=44218)
                  0.0625 = fieldNorm(doc=5125)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Focuses on possible mathematical theories of citation and on the intrinsic problems related to it. Sheds light on aspects of mathematical complexity as encountered in, for example, fractal theory and Mandelbrot's law. Also discusses dynamical aspects of citation theory as reflected in evolutions of journal rankings, centres of gravity or of the set of source journals. Makes some comments in this connection on growth and obsolescence
  2. Egghe, L.: Sampling and concentration values of incomplete bibliographies (2002) 0.03
    0.03260874 = product of:
      0.06521748 = sum of:
        0.06521748 = product of:
          0.13043496 = sum of:
            0.13043496 = weight(_text_:light in 450) [ClassicSimilarity], result of:
              0.13043496 = score(doc=450,freq=2.0), product of:
                0.2920221 = queryWeight, product of:
                  5.7753086 = idf(docFreq=372, maxDocs=44218)
                  0.050563898 = queryNorm
                0.44666123 = fieldWeight in 450, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  5.7753086 = idf(docFreq=372, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=450)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    This article studies concentration aspects of bibliographies. More, in particular, we study the impact of incompleteness of such a bibliography on its concentration values (i.e., its degree of inequality of production of its sources). Incompleteness is modeled by sampling in the complete bibliography. The model is general enough to comprise truncation of a bibliography as well as a systematic sample on sources or items. In all cases we prove that the sampled bibliography (or incomplete one) has a higher concentration value than the complete one. These models, hence, shed some light on the measurement of production inequality in incomplete bibliographies.
  3. Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012) 0.02
    0.017126776 = product of:
      0.034253553 = sum of:
        0.034253553 = product of:
          0.068507105 = sum of:
            0.068507105 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
              0.068507105 = score(doc=4992,freq=2.0), product of:
                0.17706616 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.050563898 = 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)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    14. 2.2012 12:53:22
  4. Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996) 0.01
    0.010276065 = product of:
      0.02055213 = sum of:
        0.02055213 = product of:
          0.04110426 = sum of:
            0.04110426 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
              0.04110426 = score(doc=7659,freq=2.0), product of:
                0.17706616 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.050563898 = 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)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of information science. 22(1996) no.3, S.165-170
  5. Egghe, L.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004) 0.01
    0.010276065 = product of:
      0.02055213 = sum of:
        0.02055213 = product of:
          0.04110426 = sum of:
            0.04110426 = weight(_text_:22 in 2558) [ClassicSimilarity], result of:
              0.04110426 = score(doc=2558,freq=2.0), product of:
                0.17706616 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.050563898 = 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)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    14. 8.2004 19:17:22