-
Egghe, L.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004)
0.06
0.06151196 = product of:
0.12302392 = sum of:
0.12302392 = sum of:
0.0035503139 = weight(_text_:s in 2558) [ClassicSimilarity], result of:
0.0035503139 = score(doc=2558,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.072074346 = fieldWeight in 2558, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=2558)
0.082643084 = weight(_text_:f in 2558) [ClassicSimilarity], result of:
0.082643084 = score(doc=2558,freq=6.0), product of:
0.18058246 = queryWeight, product of:
3.985786 = idf(docFreq=2232, maxDocs=44218)
0.04530661 = 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)
0.036830522 = weight(_text_:22 in 2558) [ClassicSimilarity], result of:
0.036830522 = score(doc=2558,freq=2.0), product of:
0.15865603 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04530661 = 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)
0.5 = coord(1/2)
- 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
- Source
- Information processing and management. 40(2004) no.1, S.21-30
-
Egghe, L.: Existence theorem of the quadruple (P, R, F, M) : precision, recall, fallout and miss (2007)
0.04
0.036747355 = product of:
0.07349471 = sum of:
0.07349471 = product of:
0.11024206 = sum of:
0.0035503139 = weight(_text_:s in 2011) [ClassicSimilarity], result of:
0.0035503139 = score(doc=2011,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.072074346 = fieldWeight in 2011, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=2011)
0.10669175 = weight(_text_:f in 2011) [ClassicSimilarity], result of:
0.10669175 = score(doc=2011,freq=10.0), product of:
0.18058246 = queryWeight, product of:
3.985786 = idf(docFreq=2232, maxDocs=44218)
0.04530661 = 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)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- 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.
- Source
- Information processing and management. 43(2007) no.1, S.265-272
-
Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012)
0.02
0.023250792 = product of:
0.046501584 = sum of:
0.046501584 = product of:
0.06975237 = sum of:
0.008368171 = weight(_text_:s in 4992) [ClassicSimilarity], result of:
0.008368171 = score(doc=4992,freq=4.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.16988087 = fieldWeight in 4992, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=4992)
0.061384205 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
0.061384205 = score(doc=4992,freq=2.0), product of:
0.15865603 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04530661 = 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)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 14. 2.2012 12:53:22
- Footnote
- This article corrects: Thoughts on uncitedness: Nobel laureates and Fields medalists as case studies in: JASIST 62(2011) no,8, S.1637-1644.
- Source
- Journal of the American Society for Information Science and Technology. 63(2012) no.2, S.429
-
Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996)
0.01
0.0134602785 = product of:
0.026920557 = sum of:
0.026920557 = product of:
0.040380836 = sum of:
0.0035503139 = weight(_text_:s in 7659) [ClassicSimilarity], result of:
0.0035503139 = score(doc=7659,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.072074346 = fieldWeight in 7659, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=7659)
0.036830522 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
0.036830522 = score(doc=7659,freq=2.0), product of:
0.15865603 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04530661 = 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)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Journal of information science. 22(1996) no.3, S.165-170
-
Egghe, L.: Little science, big science and beyond (1994)
0.00
0.0013806777 = product of:
0.0027613554 = sum of:
0.0027613554 = product of:
0.008284066 = sum of:
0.008284066 = weight(_text_:s in 6883) [ClassicSimilarity], result of:
0.008284066 = score(doc=6883,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.16817348 = fieldWeight in 6883, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.109375 = fieldNorm(doc=6883)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Scientometrics. 30(1994) nos.2/3, S.389-392
-
Egghe, L.: Expansion of the field of informetrics : the second special issue (2006)
0.00
0.001183438 = product of:
0.002366876 = sum of:
0.002366876 = product of:
0.0071006278 = sum of:
0.0071006278 = weight(_text_:s in 7119) [ClassicSimilarity], result of:
0.0071006278 = score(doc=7119,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.14414869 = fieldWeight in 7119, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.09375 = fieldNorm(doc=7119)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Information processing and management. 42(2006) no.6, S.1405-1407
-
Egghe, L.: Expansion of the field of informetrics : origins and consequences (2005)
0.00
0.001183438 = product of:
0.002366876 = sum of:
0.002366876 = product of:
0.0071006278 = sum of:
0.0071006278 = weight(_text_:s in 1910) [ClassicSimilarity], result of:
0.0071006278 = score(doc=1910,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.14414869 = fieldWeight in 1910, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.09375 = fieldNorm(doc=1910)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Information processing and management. 41(2005) no.6, S.1311-1316
-
Egghe, L.: Special features of the author - publication relationship and a new explanation of Lotka's law based on convolution theory (1994)
0.00
0.001183438 = product of:
0.002366876 = sum of:
0.002366876 = product of:
0.0071006278 = sum of:
0.0071006278 = weight(_text_:s in 5068) [ClassicSimilarity], result of:
0.0071006278 = score(doc=5068,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.14414869 = fieldWeight in 5068, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.09375 = fieldNorm(doc=5068)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science. 45(1994) no.6, S.422-427
-
Egghe, L.: Note on a possible decomposition of the h-Index (2013)
0.00
0.001183438 = product of:
0.002366876 = sum of:
0.002366876 = product of:
0.0071006278 = sum of:
0.0071006278 = weight(_text_:s in 683) [ClassicSimilarity], result of:
0.0071006278 = score(doc=683,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.14414869 = fieldWeight in 683, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.09375 = fieldNorm(doc=683)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 64(2013) no.4, S.871
-
Egghe, L.: ¬The Hirsch index and related impact measures (2010)
0.00
0.001183438 = product of:
0.002366876 = sum of:
0.002366876 = product of:
0.0071006278 = sum of:
0.0071006278 = weight(_text_:s in 1597) [ClassicSimilarity], result of:
0.0071006278 = score(doc=1597,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.14414869 = fieldWeight in 1597, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.09375 = fieldNorm(doc=1597)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Annual review of information science and technology. 44(2010) no.1, S.65-114
-
Egghe, L.: Informetric explanation of some Leiden Ranking graphs (2014)
0.00
0.0011157561 = product of:
0.0022315122 = sum of:
0.0022315122 = product of:
0.0066945367 = sum of:
0.0066945367 = weight(_text_:s in 1236) [ClassicSimilarity], result of:
0.0066945367 = score(doc=1236,freq=4.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.1359047 = fieldWeight in 1236, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=1236)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- 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.
- Source
- Journal of the Association for Information Science and Technology. 65(2014) no.4, S.737-741
-
Egghe, L.: ¬A good normalized impact and concentration measure (2014)
0.00
9.861984E-4 = product of:
0.0019723969 = sum of:
0.0019723969 = product of:
0.00591719 = sum of:
0.00591719 = weight(_text_:s in 1508) [ClassicSimilarity], result of:
0.00591719 = score(doc=1508,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.120123915 = fieldWeight in 1508, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=1508)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the Association for Information Science and Technology. 65(2014) no.10, S.2052-2054
-
Egghe, L.; Rousseau, R.; Rousseau, S.: TOP-curves (2007)
0.00
9.762866E-4 = product of:
0.0019525732 = sum of:
0.0019525732 = product of:
0.0058577196 = sum of:
0.0058577196 = weight(_text_:s in 50) [ClassicSimilarity], result of:
0.0058577196 = score(doc=50,freq=4.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.118916616 = fieldWeight in 50, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0546875 = fieldNorm(doc=50)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 58(2007) no.6, S.777-785
-
Egghe, L.: ¬A rationale for the Hirsch-index rank-order distribution and a comparison with the impact factor rank-order distribution (2009)
0.00
9.762866E-4 = product of:
0.0019525732 = sum of:
0.0019525732 = product of:
0.0058577196 = sum of:
0.0058577196 = weight(_text_:s in 3124) [ClassicSimilarity], result of:
0.0058577196 = score(doc=3124,freq=4.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.118916616 = fieldWeight in 3124, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0546875 = fieldNorm(doc=3124)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Abstract
- We present a rationale for the Hirsch-index rank-order distribution and prove that it is a power law (hence a straight line in the log-log scale). This is confirmed by experimental data of Pyykkö and by data produced in this article on 206 mathematics journals. This distribution is of a completely different nature than the impact factor (IF) rank-order distribution which (as proved in a previous article) is S-shaped. This is also confirmed by our example. Only in the log-log scale of the h-index distribution do we notice a concave deviation of the straight line for higher ranks. This phenomenon is discussed.
- Source
- Journal of the American Society for Information Science and Technology. 60(2009) no.10, S.2142-2144
-
Egghe, L.; Ravichandra Rao, I.K.: ¬The influence of the broadness of a query of a topic on its h-index : models and examples of the h-index of n-grams (2008)
0.00
8.54073E-4 = product of:
0.001708146 = sum of:
0.001708146 = product of:
0.0051244376 = sum of:
0.0051244376 = weight(_text_:s in 2009) [ClassicSimilarity], result of:
0.0051244376 = score(doc=2009,freq=6.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.10403037 = fieldWeight in 2009, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0390625 = fieldNorm(doc=2009)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Abstract
- The article studies the influence of the query formulation of a topic on its h-index. In order to generate pure random sets of documents, we used N-grams (N variable) to measure this influence: strings of zeros, truncated at the end. The used databases are WoS and Scopus. The formula h=T**1/alpha, proved in Egghe and Rousseau (2006) where T is the number of retrieved documents and is Lotka's exponent, is confirmed being a concavely increasing function of T. We also give a formula for the relation between h and N the length of the N-gram: h=D10**(-N/alpha) where D is a constant, a convexly decreasing function, which is found in our experiments. Nonlinear regression on h=T**1/alpha gives an estimation of , which can then be used to estimate the h-index of the entire database (Web of Science [WoS] and Scopus): h=S**1/alpha, , where S is the total number of documents in the database.
- Source
- Journal of the American Society for Information Science and Technology. 59(2008) no.10, S.1688-1693
-
Egghe, L.; Guns, R.; Rousseau, R.: Thoughts on uncitedness : Nobel laureates and Fields medalists as case studies (2011)
0.00
8.368171E-4 = product of:
0.0016736342 = sum of:
0.0016736342 = product of:
0.0050209025 = sum of:
0.0050209025 = weight(_text_:s in 4994) [ClassicSimilarity], result of:
0.0050209025 = score(doc=4994,freq=4.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.101928525 = fieldWeight in 4994, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=4994)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Footnote
- Vgl.: Erratum. In: Journal of the American Society for Information Science and Technology. 63(2012) no.2, S.429.
- Source
- Journal of the American Society for Information Science and Technology. 62(2011) no.8, S.1637-1644
-
Egghe, L.: ¬The amount of actions needed for shelving and reshelving (1996)
0.00
7.889587E-4 = product of:
0.0015779174 = sum of:
0.0015779174 = product of:
0.004733752 = sum of:
0.004733752 = weight(_text_:s in 4394) [ClassicSimilarity], result of:
0.004733752 = score(doc=4394,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.09609913 = fieldWeight in 4394, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=4394)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Library management. 17(1996) no.1, S.18-24
-
Egghe, L.; Rousseau, R.: Duality in information retrieval and the hypegeometric distribution (1997)
0.00
7.889587E-4 = product of:
0.0015779174 = sum of:
0.0015779174 = product of:
0.004733752 = sum of:
0.004733752 = weight(_text_:s in 647) [ClassicSimilarity], result of:
0.004733752 = score(doc=647,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.09609913 = fieldWeight in 647, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=647)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of documentation. 53(1997) no.5, S.499-496
-
Egghe, L.: On the law of Zipf-Mandelbrot for multi-word phrases (1999)
0.00
7.889587E-4 = product of:
0.0015779174 = sum of:
0.0015779174 = product of:
0.004733752 = sum of:
0.004733752 = weight(_text_:s in 3058) [ClassicSimilarity], result of:
0.004733752 = score(doc=3058,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.09609913 = fieldWeight in 3058, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=3058)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science. 50(1999) no.3, S.233-241
-
Egghe, L.; Rousseau, R.: ¬A theoretical study of recall and precision using a topological approach to information retrieval (1998)
0.00
7.889587E-4 = product of:
0.0015779174 = sum of:
0.0015779174 = product of:
0.004733752 = sum of:
0.004733752 = weight(_text_:s in 3267) [ClassicSimilarity], result of:
0.004733752 = score(doc=3267,freq=2.0), product of:
0.04925905 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04530661 = queryNorm
0.09609913 = fieldWeight in 3267, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=3267)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Information processing and management. 34(1998) nos.2/3, S.191-218
