-
Egghe, L.: Informetric explanation of some Leiden Ranking graphs (2014)
0.02
0.022844076 = product of:
0.13706446 = sum of:
0.13706446 = weight(_text_:ranking in 1236) [ClassicSimilarity], result of:
0.13706446 = score(doc=1236,freq=4.0), product of:
0.20271951 = queryWeight, product of:
5.4090285 = idf(docFreq=537, maxDocs=44218)
0.03747799 = queryNorm
0.67612857 = fieldWeight in 1236, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.4090285 = idf(docFreq=537, maxDocs=44218)
0.0625 = fieldNorm(doc=1236)
0.16666667 = coord(1/6)
- Abstract
- The S-shaped functional relation between the mean citation score and the proportion of top 10% publications for the 500 Leiden Ranking universities is explained using results of the shifted Lotka function. Also the concave or convex relation between the proportion of top 100?% publications, for different fractions ?, is explained using the obtained new informetric model.
-
Egghe, L.; Rousseau, R.; Rousseau, S.: TOP-curves (2007)
0.01
0.014134051 = product of:
0.084804304 = sum of:
0.084804304 = weight(_text_:ranking in 50) [ClassicSimilarity], result of:
0.084804304 = score(doc=50,freq=2.0), product of:
0.20271951 = queryWeight, product of:
5.4090285 = idf(docFreq=537, maxDocs=44218)
0.03747799 = queryNorm
0.4183332 = fieldWeight in 50, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.4090285 = idf(docFreq=537, maxDocs=44218)
0.0546875 = fieldNorm(doc=50)
0.16666667 = coord(1/6)
- Abstract
- Several characteristics of classical Lorenz curves make them unsuitable for the study of a group of topperformers. TOP-curves, defined as a kind of mirror image of TIP-curves used in poverty studies, are shown to possess the properties necessary for adequate empirical ranking of various data arrays, based on the properties of the highest performers (i.e., the core). TOP-curves and essential TOP-curves, also introduced in this article, simultaneously represent the incidence, intensity, and inequality among the top. It is shown that TOPdominance partial order, introduced in this article, is stronger than Lorenz dominance order. In this way, this article contributes to the study of cores, a central issue in applied informetrics.
-
Egghe, L.; Rousseau, R.; Hooydonk, G. van: Methods for accrediting publications to authors or countries : consequences for evaluation studies (2000)
0.01
0.0121149 = product of:
0.0726894 = sum of:
0.0726894 = weight(_text_:ranking in 4384) [ClassicSimilarity], result of:
0.0726894 = score(doc=4384,freq=2.0), product of:
0.20271951 = queryWeight, product of:
5.4090285 = idf(docFreq=537, maxDocs=44218)
0.03747799 = queryNorm
0.35857132 = fieldWeight in 4384, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.4090285 = idf(docFreq=537, maxDocs=44218)
0.046875 = fieldNorm(doc=4384)
0.16666667 = coord(1/6)
- Abstract
- One aim of science evaluation studies is to determine quantitatively the contribution of different players (authors, departments, countries) to the whole system. This information is then used to study the evolution of the system, for instance to gauge the results of special national or international programs. Taking articles as our basic data, we want to determine the exact relative contribution of each coauthor or each country. These numbers are brought together to obtain country scores, or department scores, etc. It turns out, as we will show in this article, that different scoring methods can yield totally different rankings. Conseqeuntly, a ranking between countries, universities, research groups or authors, based on one particular accrediting methods does not contain an absolute truth about their relative importance
-
Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012)
0.00
0.0028209724 = product of:
0.016925834 = sum of:
0.016925834 = product of:
0.050777502 = sum of:
0.050777502 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
0.050777502 = score(doc=4992,freq=2.0), product of:
0.13124153 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03747799 = 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)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 14. 2.2012 12:53:22
-
Egghe, L.; Rousseau, R.: Introduction to informetrics : quantitative methods in library, documentation and information science (1990)
0.00
0.0019926056 = product of:
0.011955633 = sum of:
0.011955633 = product of:
0.035866898 = sum of:
0.035866898 = weight(_text_:29 in 1515) [ClassicSimilarity], result of:
0.035866898 = score(doc=1515,freq=2.0), product of:
0.13183585 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03747799 = queryNorm
0.27205724 = fieldWeight in 1515, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0546875 = fieldNorm(doc=1515)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 29. 2.2008 19:02:46
-
Egghe, L.: ¬A noninformetric analysis of the relationship between citation age and journal productivity (2001)
0.00
0.0017079476 = product of:
0.010247685 = sum of:
0.010247685 = product of:
0.030743055 = sum of:
0.030743055 = weight(_text_:29 in 5685) [ClassicSimilarity], result of:
0.030743055 = score(doc=5685,freq=2.0), product of:
0.13183585 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03747799 = queryNorm
0.23319192 = fieldWeight in 5685, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=5685)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 29. 9.2001 13:59:34
-
Egghe, L.: Influence of adding or deleting items and sources on the h-index (2010)
0.00
0.0017079476 = product of:
0.010247685 = sum of:
0.010247685 = product of:
0.030743055 = sum of:
0.030743055 = weight(_text_:29 in 3336) [ClassicSimilarity], result of:
0.030743055 = score(doc=3336,freq=2.0), product of:
0.13183585 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03747799 = queryNorm
0.23319192 = fieldWeight in 3336, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=3336)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 31. 5.2010 15:02:29
-
Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996)
0.00
0.0016925833 = product of:
0.0101555 = sum of:
0.0101555 = product of:
0.030466499 = sum of:
0.030466499 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
0.030466499 = score(doc=7659,freq=2.0), product of:
0.13124153 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03747799 = 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)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Source
- Journal of information science. 22(1996) no.3, S.165-170
-
Egghe, L.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004)
0.00
0.0016925833 = product of:
0.0101555 = sum of:
0.0101555 = product of:
0.030466499 = sum of:
0.030466499 = weight(_text_:22 in 2558) [ClassicSimilarity], result of:
0.030466499 = score(doc=2558,freq=2.0), product of:
0.13124153 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03747799 = queryNorm
0.23214069 = fieldWeight in 2558, 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=2558)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 14. 8.2004 19:17:22
-
Egghe, L.: Properties of the n-overlap vector and n-overlap similarity theory (2006)
0.00
0.0014232898 = product of:
0.008539738 = sum of:
0.008539738 = product of:
0.025619213 = sum of:
0.025619213 = weight(_text_:29 in 194) [ClassicSimilarity], result of:
0.025619213 = score(doc=194,freq=2.0), product of:
0.13183585 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03747799 = queryNorm
0.19432661 = fieldWeight in 194, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=194)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 3. 1.2007 14:26:29
-
Egghe, L.: Untangling Herdan's law and Heaps' law : mathematical and informetric arguments (2007)
0.00
0.0014232898 = product of:
0.008539738 = sum of:
0.008539738 = product of:
0.025619213 = sum of:
0.025619213 = weight(_text_:29 in 271) [ClassicSimilarity], result of:
0.025619213 = score(doc=271,freq=2.0), product of:
0.13183585 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03747799 = queryNorm
0.19432661 = fieldWeight in 271, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=271)
0.33333334 = coord(1/3)
0.16666667 = coord(1/6)
- Date
- 29. 4.2007 19:51:08
