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  • × year_i:[2000 TO 2010}
  • × author_ss:"Egghe, L."
  1. Egghe, L.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004) 0.02 
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    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) 0.00 
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    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) 0.00 
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    Source
    Information processing and management. 41(2005) no.6, S.1311-1316
  4. Egghe, L.; Rousseau, R.; Rousseau, S.: TOP-curves (2007) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.6, S.777-785
  5. Egghe, L.: ¬A rationale for the Hirsch-index rank-order distribution and a comparison with the impact factor rank-order distribution (2009) 0.00 
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    Abstract
    We present a rationale for the Hirsch-index rank-order distribution and prove that it is a power law (hence a straight line in the log-log scale). This is confirmed by experimental data of Pyykkö and by data produced in this article on 206 mathematics journals. This distribution is of a completely different nature than the impact factor (IF) rank-order distribution which (as proved in a previous article) is S-shaped. This is also confirmed by our example. Only in the log-log scale of the h-index distribution do we notice a concave deviation of the straight line for higher ranks. This phenomenon is discussed.
    Source
    Journal of the American Society for Information Science and Technology. 60(2009) no.10, S.2142-2144
  6. Egghe, L.; Ravichandra Rao, I.K.: ¬The influence of the broadness of a query of a topic on its h-index : models and examples of the h-index of n-grams (2008) 0.00 
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    Abstract
    The article studies the influence of the query formulation of a topic on its h-index. In order to generate pure random sets of documents, we used N-grams (N variable) to measure this influence: strings of zeros, truncated at the end. The used databases are WoS and Scopus. The formula h=T**1/alpha, proved in Egghe and Rousseau (2006) where T is the number of retrieved documents and is Lotka's exponent, is confirmed being a concavely increasing function of T. We also give a formula for the relation between h and N the length of the N-gram: h=D10**(-N/alpha) where D is a constant, a convexly decreasing function, which is found in our experiments. Nonlinear regression on h=T**1/alpha gives an estimation of , which can then be used to estimate the h-index of the entire database (Web of Science [WoS] and Scopus): h=S**1/alpha, , where S is the total number of documents in the database.
    Source
    Journal of the American Society for Information Science and Technology. 59(2008) no.10, S.1688-1693
  7. Egghe, L.; Rousseau, R.: ¬The influence of publication delays on the observed aging distribution of scientific literature (2000) 0.00 
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    Source
    Journal of the American Society for Information Science. 51(2000) no.2, S.158-165
  8. Egghe, L.; Liang, L.; Rousseau, R.: ¬A relation between h-index and impact factor in the power-law model (2009) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 60(2009) no.11, S.2362-2365
  9. Egghe, L.: Dynamic h-index : the Hirsch index in function of time (2007) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.3, S.452-454
  10. Egghe, L.; Rousseau, R.: ¬An h-index weighted by citation impact (2008) 0.00 
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    Source
    Information processing and management. 44(2008) no.2, S.770-780
  11. Egghe, L.: Sampling and concentration values of incomplete bibliographies (2002) 0.00 
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    Source
    Journal of the American Society for Information Science and technology. 53(2002) no.4, S.271-281
  12. Egghe, L.: Vector retrieval, fuzzy retrieval and the universal fuzzy IR surface for IR evaluation (2004) 0.00 
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    Source
    Information processing and management. 40(2004) no.4, S.603-618
  13. Egghe, L.: ¬The influence of transformations on the h-index and the g-index (2008) 0.00 
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    Source
    Journal of the American Society for Information Science and Technology. 59(2008) no.8, S.1304-1312
  14. Egghe, L.; Liang, L.; Rousseau, R.: Fundamental properties of rhythm sequences (2008) 0.00 
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    Journal of the American Society for Information Science and Technology. 59(2008) no.9, S.1469-1478
  15. Egghe, L.; Rousseau, R.; Hooydonk, G. van: Methods for accrediting publications to authors or countries : consequences for evaluation studies (2000) 0.00 
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    Journal of the American Society for Information Science. 51(2000) no.2, S.145-157
  16. Egghe, L.; Rousseau, R.: Aging, obsolescence, impact, growth, and utilization : definitions and relations (2000) 0.00 
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    Journal of the American Society for Information Science. 51(2000) no.11, S.1004-1017
  17. Egghe, L.: ¬A noninformetric analysis of the relationship between citation age and journal productivity (2001) 0.00 
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    Journal of the American Society for Information Science and technology. 52(2001) no.5, S.371-377
  18. Egghe, L.; Ravichandra Rao, I.K.: Duality revisited : construction of fractional frequency distributions based on two dual Lotka laws (2002) 0.00 
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    Journal of the American Society for Information Science and technology. 53(2002) no.10, S.789-801
  19. Egghe, L.: Relations between the continuous and the discrete Lotka power function (2005) 0.00 
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    Journal of the American Society for Information Science and Technology. 56(2005) no.7, S.664-668
  20. Egghe, L.: Zipfian and Lotkaian continuous concentration theory (2005) 0.00 
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    Journal of the American Society for Information Science and Technology. 56(2005) no.9, S.935-945

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