[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.1633/JISTaP.2013.1.3.1

A New Explanation of Some Leiden Ranking Graphs Using Exponential Functions

Egghe, Leo (Campus Diepenbeek Universiteit Hasselt)

Publication Information

Journal of Information Science Theory and Practice / v.1, no.3, 2013 , pp. 6-11 More about this Journal

Abstract

A new explanation, using exponential functions, is given for the S-shaped functional relation between the mean citation score and the proportion of top 10% (and other percentages) publications for the 500 Leiden Ranking universities. With this new model we again obtain an explanation for the concave or convex relation between the proportion of top $100{\theta}%$ publications, for different fractions of ${\theta}$ .

Keywords

Leiden ranking; exponential function; mean citation rate; S-shaped;

Citations & Related Records

Reference

1	Egghe, L. (2013). Informetric explanation of some Leiden Ranking graphs. Journal of the American Society for Informetric Science and Technology, to appear.
2	Egghe, L. & Rousseau, R. (2012). Theory and practise of the shifted Lotka function. Scientometrics, 91(1), 295-301. DOI
3	Waltman, L., Calero-Medina, C., Kosten, J., Noyons, E. C.M., Tijssen, R. J.W., van Eck, N.J., van Leeuwen, T.N., van Raan, A. F.J., Visser, M.S., & Wouters, P. (2012). The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation. Journal of the American Society for Information Science and Technology, 63(12), 2419-2432. DOI ScienceOn