-
Rousseau, R.: Robert Fairthorne and the empirical power laws (2005)
0.03
0.025685312 = product of:
0.051370624 = sum of:
0.051370624 = product of:
0.10274125 = sum of:
0.10274125 = weight(_text_:2005 in 4398) [ClassicSimilarity], result of:
0.10274125 = score(doc=4398,freq=5.0), product of:
0.1940735 = queryWeight, product of:
4.329179 = idf(docFreq=1583, maxDocs=44218)
0.04482917 = queryNorm
0.5293935 = fieldWeight in 4398, product of:
2.236068 = tf(freq=5.0), with freq of:
5.0 = termFreq=5.0
4.329179 = idf(docFreq=1583, maxDocs=44218)
0.0546875 = fieldNorm(doc=4398)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of documentation. 61(2005) no.2, S.194-202
- Year
- 2005
-
Frandsen, T.F.; Rousseau, R.: Article impact calculated over arbitrary periods (2005)
0.02
0.022015981 = product of:
0.044031963 = sum of:
0.044031963 = product of:
0.088063926 = sum of:
0.088063926 = weight(_text_:2005 in 3264) [ClassicSimilarity], result of:
0.088063926 = score(doc=3264,freq=5.0), product of:
0.1940735 = queryWeight, product of:
4.329179 = idf(docFreq=1583, maxDocs=44218)
0.04482917 = queryNorm
0.45376584 = fieldWeight in 3264, product of:
2.236068 = tf(freq=5.0), with freq of:
5.0 = termFreq=5.0
4.329179 = idf(docFreq=1583, maxDocs=44218)
0.046875 = fieldNorm(doc=3264)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 56(2005) no.1, S.58-62
- Year
- 2005
-
Guns, R.; Rousseau, R.: Simulating growth of the h-index (2009)
0.02
0.016244818 = product of:
0.032489635 = sum of:
0.032489635 = product of:
0.06497927 = sum of:
0.06497927 = weight(_text_:2005 in 2717) [ClassicSimilarity], result of:
0.06497927 = score(doc=2717,freq=2.0), product of:
0.1940735 = queryWeight, product of:
4.329179 = idf(docFreq=1583, maxDocs=44218)
0.04482917 = queryNorm
0.33481783 = fieldWeight in 2717, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.329179 = idf(docFreq=1583, maxDocs=44218)
0.0546875 = fieldNorm(doc=2717)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Temporal growth of the h-index in a diachronous cumulative time series is predicted to be linear by Hirsch (2005), whereas other models predict a concave increase. Actual data generally yield a linear growth or S-shaped growth. We study the h-index's growth in computer simulations of the publication-citation process. In most simulations the h-index grows linearly in time. Only occasionally does an S-shape occur, while in our simulations a concave increase is very rare. The latter is often signalled by the occurrence of plateaus - periods of h-index stagnation. Several parameters and their influence on the h-index's growth are determined and discussed.
-
Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012)
0.02
0.015184335 = product of:
0.03036867 = sum of:
0.03036867 = product of:
0.06073734 = sum of:
0.06073734 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
0.06073734 = score(doc=4992,freq=2.0), product of:
0.15698412 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04482917 = queryNorm
0.38690117 = fieldWeight in 4992, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=4992)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 14. 2.2012 12:53:22
-
Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996)
0.01
0.009110601 = product of:
0.018221201 = sum of:
0.018221201 = product of:
0.036442403 = sum of:
0.036442403 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
0.036442403 = score(doc=7659,freq=2.0), product of:
0.15698412 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04482917 = 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
-
Asonuma, A.; Fang, Y.; Rousseau, R.: Reflections on the age distribution of Japanese scientists (2006)
0.01
0.009110601 = product of:
0.018221201 = sum of:
0.018221201 = product of:
0.036442403 = sum of:
0.036442403 = weight(_text_:22 in 5270) [ClassicSimilarity], result of:
0.036442403 = score(doc=5270,freq=2.0), product of:
0.15698412 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04482917 = queryNorm
0.23214069 = fieldWeight in 5270, 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=5270)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 15:26:24
-
Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003)
0.01
0.006073734 = product of:
0.012147468 = sum of:
0.012147468 = product of:
0.024294935 = sum of:
0.024294935 = weight(_text_:22 in 5171) [ClassicSimilarity], result of:
0.024294935 = score(doc=5171,freq=2.0), product of:
0.15698412 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04482917 = queryNorm
0.15476047 = fieldWeight in 5171, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=5171)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 9. 7.2006 10:22:35