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  • × theme_ss:"Informetrie"
  • × author_ss:"Egghe, L."
  1. Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996) 0.04 
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    Source
    Journal of information science. 22(1996) no.3, S.165-170
  2. Egghe, L.: Little science, big science and beyond (1994) 0.03 
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  3. Egghe, L.: Expansion of the field of informetrics : the second special issue (2006) 0.02 
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  4. Egghe, L.: Expansion of the field of informetrics : origins and consequences (2005) 0.02 
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  5. Egghe, L.: Special features of the author - publication relationship and a new explanation of Lotka's law based on convolution theory (1994) 0.02 
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  6. Egghe, L.: Note on a possible decomposition of the h-Index (2013) 0.02 
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  7. Egghe, L.: ¬The Hirsch index and related impact measures (2010) 0.02 
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  8. Egghe, L.; Liang, L.; Rousseau, R.: ¬A relation between h-index and impact factor in the power-law model (2009) 0.02 
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  9. Egghe, L.: ¬A good normalized impact and concentration measure (2014) 0.02 
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  10. Egghe, L.; Liang, L.; Rousseau, R.: Fundamental properties of rhythm sequences (2008) 0.02 
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  11. Egghe, L.; Leydesdorff, L.: ¬The relation between Pearson's correlation coefficient r and Salton's cosine measure (2009) 0.02 
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  12. Egghe, L.; Rousseau, R.: Duality in information retrieval and the hypegeometric distribution (1997) 0.02 
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  13. Egghe, L.: On the law of Zipf-Mandelbrot for multi-word phrases (1999) 0.02 
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  14. Egghe, L.; Rousseau, R.: ¬The influence of publication delays on the observed aging distribution of scientific literature (2000) 0.02 
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  15. Egghe, L.: Mathematical theories of citation (1998) 0.02 
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  16. Egghe, L.: Dynamic h-index : the Hirsch index in function of time (2007) 0.02 
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  17. Egghe, L.: Informetric explanation of some Leiden Ranking graphs (2014) 0.02 
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  18. Egghe, L.: Mathematical study of h-index sequences (2009) 0.01 
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    Abstract
    This paper studies mathematical properties of h-index sequences as developed by Liang [Liang, L. (2006). h-Index sequence and h-index matrix: Constructions and applications. Scientometrics, 69(1), 153-159]. For practical reasons, Liming studies such sequences where the time goes backwards while it is more logical to use the time going forward (real career periods). Both type of h-index sequences are studied here and their interrelations are revealed. We show cases where these sequences are convex, linear and concave. We also show that, when one of the sequences is convex then the other one is concave, showing that the reverse-time sequence, in general, cannot be used to derive similar properties of the (difficult to obtain) forward time sequence. We show that both sequences are the same if and only if the author produces the same number of papers per year. If the author produces an increasing number of papers per year, then Liang's h-sequences are above the "normal" ones. All these results are also valid for g- and R-sequences. The results are confirmed by the h-, g- and R-sequences (forward and reverse time) of the author.
  19. Egghe, L.: Sampling and concentration values of incomplete bibliographies (2002) 0.01 
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  20. Egghe, L.; Rousseau, R.; Rousseau, S.: TOP-curves (2007) 0.01 
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