Search (13 results, page 1 of 1)

Egghe, L.: ¬A universal method of information retrieval evaluation : the "missing" link M and the universal IR surface (2004) 0.01

0.013432972 = product of:
  0.0470154 = sum of:
    0.030535674 = weight(_text_:management in 2558) [ClassicSimilarity], result of:
      0.030535674 = score(doc=2558,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.22344214 = fieldWeight in 2558, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.046875 = fieldNorm(doc=2558)
    0.016479723 = product of:
      0.032959446 = sum of:
        0.032959446 = weight(_text_:22 in 2558) [ClassicSimilarity], result of:
          0.032959446 = score(doc=2558,freq=2.0), product of:
            0.14198048 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04054466 = 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)
  0.2857143 = coord(2/7)

Date: 14. 8.2004 19:17:22
Source: Information processing and management. 40(2004) no.1, S.21-30

Egghe, L.: Expansion of the field of informetrics : the second special issue (2006) 0.01

0.008724479 = product of:
  0.061071347 = sum of:
    0.061071347 = weight(_text_:management in 7119) [ClassicSimilarity], result of:
      0.061071347 = score(doc=7119,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.44688427 = fieldWeight in 7119, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.09375 = fieldNorm(doc=7119)
  0.14285715 = coord(1/7)

Source: Information processing and management. 42(2006) no.6, S.1405-1407

Egghe, L.: Expansion of the field of informetrics : origins and consequences (2005) 0.01

0.008724479 = product of:
  0.061071347 = sum of:
    0.061071347 = weight(_text_:management in 1910) [ClassicSimilarity], result of:
      0.061071347 = score(doc=1910,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.44688427 = fieldWeight in 1910, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.09375 = fieldNorm(doc=1910)
  0.14285715 = coord(1/7)

Source: Information processing and management. 41(2005) no.6, S.1311-1316

Egghe, L.: ¬A new short proof of Naranan's theorem, explaining Lotka's law and Zipf's law (2010) 0.01

0.006791588 = product of:
  0.04754111 = sum of:
    0.04754111 = product of:
      0.09508222 = sum of:
        0.09508222 = weight(_text_:states in 3432) [ClassicSimilarity], result of:
          0.09508222 = score(doc=3432,freq=2.0), product of:
            0.22326207 = queryWeight, product of:
              5.506572 = idf(docFreq=487, maxDocs=44218)
              0.04054466 = queryNorm
            0.42587718 = fieldWeight in 3432, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.506572 = idf(docFreq=487, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3432)
      0.5 = coord(1/2)
  0.14285715 = coord(1/7)

Abstract: Naranan's important theorem, published in Nature in 1970, states that if the number of journals grows exponentially and if the number of articles in each journal grows exponentially (at the same rate for each journal), then the system satisfies Lotka's law and a formula for the Lotka's exponent is given in function of the growth rates of the journals and the articles. This brief communication re-proves this result by showing that the system satisfies Zipf's law, which is equivalent with Lotka's law. The proof is short and algebraic and does not use infinitesimal arguments.

Egghe, L.: Existence theorem of the quadruple (P, R, F, M) : precision, recall, fallout and miss (2007) 0.01
```
0.0061691385 = product of:
  0.043183967 = sum of:
    0.043183967 = weight(_text_:management in 2011) [ClassicSimilarity], result of:
      0.043183967 = score(doc=2011,freq=4.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.31599492 = fieldWeight in 2011, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.046875 = fieldNorm(doc=2011)
  0.14285715 = coord(1/7)
```
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.: ¬The amount of actions needed for shelving and reshelving (1996) 0.01

0.0058163195 = product of:
  0.040714234 = sum of:
    0.040714234 = weight(_text_:management in 4394) [ClassicSimilarity], result of:
      0.040714234 = score(doc=4394,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.29792285 = fieldWeight in 4394, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.0625 = fieldNorm(doc=4394)
  0.14285715 = coord(1/7)

Source: Library management. 17(1996) no.1, S.18-24

Egghe, L.; Rousseau, R.: ¬A theoretical study of recall and precision using a topological approach to information retrieval (1998) 0.01

0.0058163195 = product of:
  0.040714234 = sum of:
    0.040714234 = weight(_text_:management in 3267) [ClassicSimilarity], result of:
      0.040714234 = score(doc=3267,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.29792285 = fieldWeight in 3267, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.0625 = fieldNorm(doc=3267)
  0.14285715 = coord(1/7)

Source: Information processing and management. 34(1998) nos.2/3, S.191-218

Egghe, L.; Rousseau, R.: ¬An h-index weighted by citation impact (2008) 0.01

0.0058163195 = product of:
  0.040714234 = sum of:
    0.040714234 = weight(_text_:management in 695) [ClassicSimilarity], result of:
      0.040714234 = score(doc=695,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.29792285 = fieldWeight in 695, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.0625 = fieldNorm(doc=695)
  0.14285715 = coord(1/7)

Source: Information processing and management. 44(2008) no.2, S.770-780

Egghe, L.: Vector retrieval, fuzzy retrieval and the universal fuzzy IR surface for IR evaluation (2004) 0.01

0.0050892793 = product of:
  0.035624955 = sum of:
    0.035624955 = weight(_text_:management in 2531) [ClassicSimilarity], result of:
      0.035624955 = score(doc=2531,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.2606825 = fieldWeight in 2531, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2531)
  0.14285715 = coord(1/7)

Source: Information processing and management. 40(2004) no.4, S.603-618

Egghe, L.; Guns, R.; Rousseau, R.; Leuven, K.U.: Erratum (2012) 0.00

0.003923744 = product of:
  0.027466208 = sum of:
    0.027466208 = product of:
      0.054932415 = sum of:
        0.054932415 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
          0.054932415 = score(doc=4992,freq=2.0), product of:
            0.14198048 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04054466 = 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)
  0.14285715 = coord(1/7)

Date: 14. 2.2012 12:53:22

Egghe, L.: ¬The measures precision, recall, fallout and miss as a function of the number of retrieved documents and their mutual interrelations (2008) 0.00

0.0036351997 = product of:
  0.025446396 = sum of:
    0.025446396 = weight(_text_:management in 2067) [ClassicSimilarity], result of:
      0.025446396 = score(doc=2067,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.18620178 = fieldWeight in 2067, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2067)
  0.14285715 = coord(1/7)

Source: Information processing and management. 44(2008) no.2, S.856-876

Egghe, L.: Mathematical study of h-index sequences (2009) 0.00

0.0036351997 = product of:
  0.025446396 = sum of:
    0.025446396 = weight(_text_:management in 4217) [ClassicSimilarity], result of:
      0.025446396 = score(doc=4217,freq=2.0), product of:
        0.13666032 = queryWeight, product of:
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.04054466 = queryNorm
        0.18620178 = fieldWeight in 4217, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.3706124 = idf(docFreq=4130, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4217)
  0.14285715 = coord(1/7)

Source: Information processing and management. 45(2009) no.2, S.288-297

Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996) 0.00

0.0023542463 = product of:
  0.016479723 = sum of:
    0.016479723 = product of:
      0.032959446 = sum of:
        0.032959446 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
          0.032959446 = score(doc=7659,freq=2.0), product of:
            0.14198048 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04054466 = 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)
  0.14285715 = coord(1/7)

Source: Journal of information science. 22(1996) no.3, S.165-170

Search (13 results, page 1 of 1)

Authors

Years

Themes