Rousseau R. "Median and percentile impact factors: A set of new indicators " SCIENTOMETRICS 63 (3): 431-441 JUN 2005

[Eugene Garfield]

Ronald Rousseau: ronald.rousseau at khbo.be

Title: Median and percentile impact factors: A set of new indicators

Author(s): Rousseau R

Source: SCIENTOMETRICS 63 (3): 431-441 JUN 2005

Document Type: Article    Language: English
Cited References: 21      Times Cited: 0

Abstract:
In a recent article Sombatsompop et al. (2004) proposed a new way of
calculating a synchronous journal impact factor. Their proposal seems quite
interesting and will be discussed in this note. Their index will be
referred as the Median Impact Factor (MIF). I explain every step in detail
so that readers with little mathematical background can understand and
apply the procedure. Illustrations of the procedure are presented. Some
attention is given to the estimation of the median cited age in case it is
larger than ten year. I think the idea introduced by Sombatsompop, Markpin
and Premkamolnetr has a great theoretical value as they are - to the best
of my knowledge - the first ones to consider impact factors not using years
as a basic ingredient, but an element of the actual form of the citation
curve. The MIF is further generalized to the notion of a percentile impact
factor.

Addresses: Rousseau R (reprint author), KHBO Ind Sci & Technol, Zeedijk
101, Oostende, B-8400 Belgium
KHBO Ind Sci & Technol, Oostende, B-8400 Belgium
LUC, Diepenbeek, Belgium

E-mail Addresses: ronald.rousseau at khbo.be

Publisher: SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Subject Category: COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS;
INFORMATION SCIENCE & LIBRARY SCIENCE
IDS Number: 924UH

ISSN: 0138-9130

Cited References:
ALONSO M, 1969, FUNDAMENTAL U PHYS, V3.
BROOKES BC, 1970, J DOC, V26, P283.
BROOKES BC, 1971, NATURE, V232, P458.
BURTON RE, 1961, PHYS TODAY, V14, P35.
EGGHE L, 1988, INFORMATION PROCESSI, V24, P567.
EGGHE L, 1990, INTRO INFORMETRICS Q.
EGGHE L, 2004, CONTINUOUS WEIGHTED.
EISELE P, 1990, AM MATH MONTHLY, V97, P466.
FRANDSEN TF, 2005, J AM SOC INF SCI TEC, V56, P58.
FROHLICH C, 2001, J AM SOC INF SCI TEC, V52, P701.
GARFIELD E, 1963, AM DOC, V14, P195.
GARFIELD E, 1998, SCIENTIST, V12, P10.
GLANZEL W, 1999, INFORM PROCESS MANAG, V35, P31.
INGWERSEN P, 2001, CHINESE SCI BULL, V46, P524.
MCCAIN KW, 1997, ADV SERIAL, V6, P105.
ROUSSEAU R, 1988, INFORMETRICS 87 88, P249.
ROUSSEAU R, 2002, LIBR TRENDS, V50, P418.
SEYMOUR CA, 1972, LIBRI, V22, P137.
SEYMOUR CA, 1972, LIBRI, V22, P183.
SOMBATSOMPOP N, 2004, SCIENTOMETRICS, V60, P217.
SZAVAKOVATS E, 2002, J AM SOC INF SCI TEC, V53, P1098.