Search (2 results, page 1 of 1)

  • × author_ss:"Egghe, L."
  • × language_ss:"e"
  • × theme_ss:"Informetrie"
  1. Egghe, L.; Rousseau, R.: ¬The Hirsch index of a shifted Lotka function and its relation with the impact factor (2012) 0.01 
    0.009617068 = product of:
  0.019234136 = sum of:
    0.019234136 = product of:
      0.03846827 = sum of:
        0.03846827 = weight(_text_:c in 243) [ClassicSimilarity], result of:
          0.03846827 = score(doc=243,freq=2.0), product of:
            0.14419673 = queryWeight, product of:
              3.4494052 = idf(docFreq=3817, maxDocs=44218)
              0.04180336 = queryNorm
            0.2667763 = fieldWeight in 243, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.4494052 = idf(docFreq=3817, maxDocs=44218)
              0.0546875 = fieldNorm(doc=243)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Based on earlier results about the shifted Lotka function, we prove an implicit functional relation between the Hirsch index (h-index) and the total number of sources (T). It is shown that the corresponding function, h(T), is concavely increasing. Next, we construct an implicit relation between the h-index and the impact factor IF (an average number of items per source). The corresponding function h(IF) is increasing and we show that if the parameter C in the numerator of the shifted Lotka function is high, then the relation between the h-index and the impact factor is almost linear.
  2. Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996) 0.01 
    0.008495667 = product of:
  0.016991334 = sum of:
    0.016991334 = product of:
      0.033982668 = sum of:
        0.033982668 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
          0.033982668 = score(doc=7659,freq=2.0), product of:
            0.14638825 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04180336 = 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

Years