-
Egghe, L.; Guns, R.; Rousseau, R.: Thoughts on uncitedness : Nobel laureates and Fields medalists as case studies (2011)
0.02
0.01549259 = product of:
0.08262715 = sum of:
0.020656787 = product of:
0.041313574 = sum of:
0.041313574 = weight(_text_:mathematik in 4994) [ClassicSimilarity], result of:
0.041313574 = score(doc=4994,freq=2.0), product of:
0.111489825 = queryWeight, product of:
5.5898643 = idf(docFreq=448, maxDocs=44218)
0.019944998 = queryNorm
0.37055913 = fieldWeight in 4994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5898643 = idf(docFreq=448, maxDocs=44218)
0.046875 = fieldNorm(doc=4994)
0.5 = coord(1/2)
0.020656787 = product of:
0.041313574 = sum of:
0.041313574 = weight(_text_:mathematik in 4994) [ClassicSimilarity], result of:
0.041313574 = score(doc=4994,freq=2.0), product of:
0.111489825 = queryWeight, product of:
5.5898643 = idf(docFreq=448, maxDocs=44218)
0.019944998 = queryNorm
0.37055913 = fieldWeight in 4994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5898643 = idf(docFreq=448, maxDocs=44218)
0.046875 = fieldNorm(doc=4994)
0.5 = coord(1/2)
0.041313574 = weight(_text_:mathematik in 4994) [ClassicSimilarity], result of:
0.041313574 = score(doc=4994,freq=2.0), product of:
0.111489825 = queryWeight, product of:
5.5898643 = idf(docFreq=448, maxDocs=44218)
0.019944998 = queryNorm
0.37055913 = fieldWeight in 4994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5898643 = idf(docFreq=448, maxDocs=44218)
0.046875 = fieldNorm(doc=4994)
0.1875 = coord(3/16)
- Field
- Mathematik
-
Egghe, L.: Note on a possible decomposition of the h-Index (2013)
0.01
0.008492014 = product of:
0.067936115 = sum of:
0.033968057 = weight(_text_:23 in 683) [ClassicSimilarity], result of:
0.033968057 = score(doc=683,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.47518367 = fieldWeight in 683, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.09375 = fieldNorm(doc=683)
0.033968057 = weight(_text_:23 in 683) [ClassicSimilarity], result of:
0.033968057 = score(doc=683,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.47518367 = fieldWeight in 683, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.09375 = fieldNorm(doc=683)
0.125 = coord(2/16)
- Date
- 23. 3.2013 14:00:46
-
Egghe, L.: ¬A good normalized impact and concentration measure (2014)
0.01
0.007076679 = product of:
0.05661343 = sum of:
0.028306715 = weight(_text_:23 in 1508) [ClassicSimilarity], result of:
0.028306715 = score(doc=1508,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.3959864 = fieldWeight in 1508, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=1508)
0.028306715 = weight(_text_:23 in 1508) [ClassicSimilarity], result of:
0.028306715 = score(doc=1508,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.3959864 = fieldWeight in 1508, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=1508)
0.125 = coord(2/16)
- Date
- 27. 9.2014 20:04:23
-
Egghe, L.: On the law of Zipf-Mandelbrot for multi-word phrases (1999)
0.01
0.005661343 = product of:
0.045290746 = sum of:
0.022645373 = weight(_text_:23 in 3058) [ClassicSimilarity], result of:
0.022645373 = score(doc=3058,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.31678912 = fieldWeight in 3058, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=3058)
0.022645373 = weight(_text_:23 in 3058) [ClassicSimilarity], result of:
0.022645373 = score(doc=3058,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.31678912 = fieldWeight in 3058, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=3058)
0.125 = coord(2/16)
- Date
- 23. 2.1999 19:56:10
-
Egghe, L.: Sampling and concentration values of incomplete bibliographies (2002)
0.00
0.004953675 = product of:
0.0396294 = sum of:
0.0198147 = weight(_text_:23 in 450) [ClassicSimilarity], result of:
0.0198147 = score(doc=450,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.27719048 = fieldWeight in 450, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=450)
0.0198147 = weight(_text_:23 in 450) [ClassicSimilarity], result of:
0.0198147 = score(doc=450,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.27719048 = fieldWeight in 450, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=450)
0.125 = coord(2/16)
- Date
- 23. 3.2002 9:43:41
-
Egghe, L.: Mathematical study of h-index sequences (2009)
0.00
0.0035383394 = product of:
0.028306715 = sum of:
0.014153358 = weight(_text_:23 in 4217) [ClassicSimilarity], result of:
0.014153358 = score(doc=4217,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.1979932 = fieldWeight in 4217, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0390625 = fieldNorm(doc=4217)
0.014153358 = weight(_text_:23 in 4217) [ClassicSimilarity], result of:
0.014153358 = score(doc=4217,freq=2.0), product of:
0.07148406 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.019944998 = queryNorm
0.1979932 = fieldWeight in 4217, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0390625 = fieldNorm(doc=4217)
0.125 = coord(2/16)
- Date
- 23. 1.2011 13:58:16
-
Egghe, L.: Informetric explanation of some Leiden Ranking graphs (2014)
0.00
0.0031086719 = product of:
0.04973875 = sum of:
0.04973875 = weight(_text_:100 in 1236) [ClassicSimilarity], result of:
0.04973875 = score(doc=1236,freq=2.0), product of:
0.1059417 = queryWeight, product of:
5.3116927 = idf(docFreq=592, maxDocs=44218)
0.019944998 = queryNorm
0.46949172 = fieldWeight in 1236, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.3116927 = idf(docFreq=592, maxDocs=44218)
0.0625 = fieldNorm(doc=1236)
0.0625 = coord(1/16)
- 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.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004)
0.00
0.002191458 = product of:
0.017531663 = sum of:
0.012127119 = product of:
0.036381356 = sum of:
0.036381356 = weight(_text_:f in 2558) [ClassicSimilarity], result of:
0.036381356 = score(doc=2558,freq=6.0), product of:
0.07949649 = queryWeight, product of:
3.985786 = idf(docFreq=2232, maxDocs=44218)
0.019944998 = queryNorm
0.45764732 = fieldWeight in 2558, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.985786 = idf(docFreq=2232, maxDocs=44218)
0.046875 = fieldNorm(doc=2558)
0.33333334 = coord(1/3)
0.005404544 = product of:
0.016213631 = sum of:
0.016213631 = weight(_text_:22 in 2558) [ClassicSimilarity], result of:
0.016213631 = score(doc=2558,freq=2.0), product of:
0.069843985 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.019944998 = 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)
0.125 = coord(2/16)
- Abstract
- The paper shows that the present evaluation methods in information retrieval (basically recall R and precision P and in some cases fallout F ) lack universal comparability in the sense that their values depend on the generality of the IR problem. A solution is given by using all "parts" of the database, including the non-relevant documents and also the not-retrieved documents. It turns out that the solution is given by introducing the measure M being the fraction of the not-retrieved documents that are relevant (hence the "miss" measure). We prove that - independent of the IR problem or of the IR action - the quadruple (P,R,F,M) belongs to a universal IR surface, being the same for all IR-activities. This universality is then exploited by defining a new measure for evaluation in IR allowing for unbiased comparisons of all IR results. We also show that only using one, two or even three measures from the set {P,R,F,M} necessary leads to evaluation measures that are non-universal and hence not capable of comparing different IR situations.
- Date
- 14. 8.2004 19:17:22
-
Egghe, L.: Existence theorem of the quadruple (P, R, F, M) : precision, recall, fallout and miss (2007)
0.00
9.785026E-4 = product of:
0.015656041 = sum of:
0.015656041 = product of:
0.04696812 = sum of:
0.04696812 = weight(_text_:f in 2011) [ClassicSimilarity], result of:
0.04696812 = score(doc=2011,freq=10.0), product of:
0.07949649 = queryWeight, product of:
3.985786 = idf(docFreq=2232, maxDocs=44218)
0.019944998 = queryNorm
0.5908201 = fieldWeight in 2011, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.985786 = idf(docFreq=2232, maxDocs=44218)
0.046875 = fieldNorm(doc=2011)
0.33333334 = coord(1/3)
0.0625 = coord(1/16)
- Abstract
- In an earlier paper [Egghe, L. (2004). A universal method of information retrieval evaluation: the "missing" link M and the universal IR surface. Information Processing and Management, 40, 21-30] we showed that, given an IR system, and if P denotes precision, R recall, F fallout and M miss (re-introduced in the paper mentioned above), we have the following relationship between P, R, F and M: P/(1-P)*(1-R)/R*F/(1-F)*(1-M)/M = 1. In this paper we prove the (more difficult) converse: given any four rational numbers in the interval ]0, 1[ satisfying the above equation, then there exists an IR system such that these four numbers (in any order) are the precision, recall, fallout and miss of this IR system. As a consequence we show that any three rational numbers in ]0, 1[ represent any three measures taken from precision, recall, fallout and miss of a certain IR system. We also show that this result is also true for two numbers instead of three.
-
Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012)
0.00
5.629733E-4 = product of:
0.009007573 = sum of:
0.009007573 = product of:
0.02702272 = sum of:
0.02702272 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
0.02702272 = score(doc=4992,freq=2.0), product of:
0.069843985 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.019944998 = 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)
0.0625 = coord(1/16)
- Date
- 14. 2.2012 12:53:22
-
Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996)
0.00
3.37784E-4 = product of:
0.005404544 = sum of:
0.005404544 = product of:
0.016213631 = sum of:
0.016213631 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
0.016213631 = score(doc=7659,freq=2.0), product of:
0.069843985 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.019944998 = 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)
0.0625 = coord(1/16)
- Source
- Journal of information science. 22(1996) no.3, S.165-170
