-
Fairthorne, R.A.: Bradford's law and perspective (1980)
0.04
0.037492394 = product of:
0.07498479 = sum of:
0.07498479 = product of:
0.14996958 = sum of:
0.14996958 = weight(_text_:o in 4992) [ClassicSimilarity], result of:
0.14996958 = score(doc=4992,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.6652047 = fieldWeight in 4992, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.09375 = fieldNorm(doc=4992)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Theory and application of information research. Proc. of the 2nd Int. Research Forum on Information Science, 3.-6.8.1977, Copenhagen. Ed.: O. Harbo u. L. Kajberg
-
Järvelin, K.; Persson, O.: ¬The DCI-index : discounted cumulated impact-based research evaluation (2008)
0.04
0.03534817 = product of:
0.07069634 = sum of:
0.07069634 = product of:
0.14139268 = sum of:
0.14139268 = weight(_text_:o in 2332) [ClassicSimilarity], result of:
0.14139268 = score(doc=2332,freq=4.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.627161 = fieldWeight in 2332, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0625 = fieldNorm(doc=2332)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- The article by K. Järvelin & O. Persson published in JASIST 59(9), The DCI-Index: Discounted Cumulated Impact-Based Research Evaluation, (pp. 1433-1440) contains an unfortunate error in one of its formulas, Equation 3. The present paper gives the correction and an example of impact analysis based on the corrected formula.
-
Persson, O.; Melin, G.: Equalization, growth and integration of science (1996)
0.03
0.031243661 = product of:
0.062487323 = sum of:
0.062487323 = product of:
0.124974646 = sum of:
0.124974646 = weight(_text_:o in 6698) [ClassicSimilarity], result of:
0.124974646 = score(doc=6698,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.55433726 = fieldWeight in 6698, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.078125 = fieldNorm(doc=6698)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Persson, O.; Beckmann, M.: Locating the network of interacting authors in scientific specialities (1995)
0.02
0.024994928 = product of:
0.049989857 = sum of:
0.049989857 = product of:
0.09997971 = sum of:
0.09997971 = weight(_text_:o in 3300) [ClassicSimilarity], result of:
0.09997971 = score(doc=3300,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.4434698 = fieldWeight in 3300, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0625 = fieldNorm(doc=3300)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Voveriene, O.; Trumpiene, A.: Bibliometrics, scientometrics and informetrics : their relationship and interactions (1994)
0.02
0.024994928 = product of:
0.049989857 = sum of:
0.049989857 = product of:
0.09997971 = sum of:
0.09997971 = weight(_text_:o in 625) [ClassicSimilarity], result of:
0.09997971 = score(doc=625,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.4434698 = fieldWeight in 625, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0625 = fieldNorm(doc=625)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Nicholls, P.T.: Empirical validation of Lotka's law (1986)
0.02
0.024351954 = product of:
0.04870391 = sum of:
0.04870391 = product of:
0.09740782 = sum of:
0.09740782 = weight(_text_:22 in 5509) [ClassicSimilarity], result of:
0.09740782 = score(doc=5509,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.61904186 = fieldWeight in 5509, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=5509)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information processing and management. 22(1986), S.417-419
-
Nicolaisen, J.: Citation analysis (2007)
0.02
0.024351954 = product of:
0.04870391 = sum of:
0.04870391 = product of:
0.09740782 = sum of:
0.09740782 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
0.09740782 = score(doc=6091,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.61904186 = fieldWeight in 6091, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=6091)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 13. 7.2008 19:53:22
-
Fiala, J.: Information flood : fiction and reality (1987)
0.02
0.024351954 = product of:
0.04870391 = sum of:
0.04870391 = product of:
0.09740782 = sum of:
0.09740782 = weight(_text_:22 in 1080) [ClassicSimilarity], result of:
0.09740782 = score(doc=1080,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.61904186 = fieldWeight in 1080, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=1080)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Thermochimica acta. 110(1987), S.11-22
-
Järvelin, K.; Persson, O.: ¬The DCI index : discounted cumulated impact-based research evaluation (2008)
0.02
0.022092605 = product of:
0.04418521 = sum of:
0.04418521 = product of:
0.08837042 = sum of:
0.08837042 = weight(_text_:o in 2694) [ClassicSimilarity], result of:
0.08837042 = score(doc=2694,freq=4.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.39197564 = fieldWeight in 2694, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0390625 = fieldNorm(doc=2694)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Content
- Erratum in: Järvelin, K., O. Persson: The DCI-index: discounted cumulated impact-based research evaluation. Erratum re. In: Journal of the American Society for Information Science and Technology. 59(2008) no.14, S.2350-2352.
-
Su, Y.; Han, L.-F.: ¬A new literature growth model : variable exponential growth law of literature (1998)
0.02
0.02152429 = product of:
0.04304858 = sum of:
0.04304858 = product of:
0.08609716 = sum of:
0.08609716 = weight(_text_:22 in 3690) [ClassicSimilarity], result of:
0.08609716 = score(doc=3690,freq=4.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.54716086 = fieldWeight in 3690, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3690)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 5.1999 19:22:35
-
Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
0.02
0.02152429 = product of:
0.04304858 = sum of:
0.04304858 = product of:
0.08609716 = sum of:
0.08609716 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
0.08609716 = score(doc=3925,freq=4.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.54716086 = fieldWeight in 3925, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3925)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 15:22:28
-
Diodato, V.: Dictionary of bibliometrics (1994)
0.02
0.02130796 = product of:
0.04261592 = sum of:
0.04261592 = product of:
0.08523184 = sum of:
0.08523184 = weight(_text_:22 in 5666) [ClassicSimilarity], result of:
0.08523184 = score(doc=5666,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.5416616 = fieldWeight in 5666, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=5666)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Footnote
- Rez. in: Journal of library and information science 22(1996) no.2, S.116-117 (L.C. Smith)
-
Bookstein, A.: Informetric distributions : I. Unified overview (1990)
0.02
0.02130796 = product of:
0.04261592 = sum of:
0.04261592 = product of:
0.08523184 = sum of:
0.08523184 = weight(_text_:22 in 6902) [ClassicSimilarity], result of:
0.08523184 = score(doc=6902,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.5416616 = fieldWeight in 6902, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6902)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 18:55:29
-
Bookstein, A.: Informetric distributions : II. Resilience to ambiguity (1990)
0.02
0.02130796 = product of:
0.04261592 = sum of:
0.04261592 = product of:
0.08523184 = sum of:
0.08523184 = weight(_text_:22 in 4689) [ClassicSimilarity], result of:
0.08523184 = score(doc=4689,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.5416616 = fieldWeight in 4689, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=4689)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 18:55:55
-
Melin, G.; Persson, O.: Hotel cosmopolitan : a bibliometric study of collaboration at some European universities (1998)
0.02
0.018746197 = product of:
0.037492394 = sum of:
0.037492394 = product of:
0.07498479 = sum of:
0.07498479 = weight(_text_:o in 329) [ClassicSimilarity], result of:
0.07498479 = score(doc=329,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.33260235 = fieldWeight in 329, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.046875 = fieldNorm(doc=329)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Lewison, G.: ¬The work of the Bibliometrics Research Group (City University) and associates (2005)
0.02
0.018263966 = product of:
0.03652793 = sum of:
0.03652793 = product of:
0.07305586 = sum of:
0.07305586 = weight(_text_:22 in 4890) [ClassicSimilarity], result of:
0.07305586 = score(doc=4890,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.46428138 = fieldWeight in 4890, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=4890)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2007 17:02:22
-
Marx, W.; Bornmann, L.: On the problems of dealing with bibliometric data (2014)
0.02
0.018263966 = product of:
0.03652793 = sum of:
0.03652793 = product of:
0.07305586 = sum of:
0.07305586 = weight(_text_:22 in 1239) [ClassicSimilarity], result of:
0.07305586 = score(doc=1239,freq=2.0), product of:
0.15735255 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044934385 = queryNorm
0.46428138 = fieldWeight in 1239, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=1239)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 18. 3.2014 19:13:22
-
Kirchik, O.; Gingras, Y.; Larivière, V.: Changes in publication languages and citation practices and their effect on the scientific impact of Russian science (1993-2010) (2012)
0.02
0.015621831 = product of:
0.031243661 = sum of:
0.031243661 = product of:
0.062487323 = sum of:
0.062487323 = weight(_text_:o in 284) [ClassicSimilarity], result of:
0.062487323 = score(doc=284,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.27716863 = fieldWeight in 284, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0390625 = fieldNorm(doc=284)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Tuomaala, O.; Järvelin, K.; Vakkari, P.: Evolution of library and information science, 1965-2005 : content analysis of journal articles (2014)
0.02
0.015621831 = product of:
0.031243661 = sum of:
0.031243661 = product of:
0.062487323 = sum of:
0.062487323 = weight(_text_:o in 1309) [ClassicSimilarity], result of:
0.062487323 = score(doc=1309,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.27716863 = fieldWeight in 1309, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0390625 = fieldNorm(doc=1309)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Kozak, M.; Iefremova, O.; Szkola, J.; Sas, D.: Do researchers provide public or institutional E-mail accounts as correspondence E-mails in scientific articles? (2015)
0.02
0.015621831 = product of:
0.031243661 = sum of:
0.031243661 = product of:
0.062487323 = sum of:
0.062487323 = weight(_text_:o in 2226) [ClassicSimilarity], result of:
0.062487323 = score(doc=2226,freq=2.0), product of:
0.22544876 = queryWeight, product of:
5.017288 = idf(docFreq=795, maxDocs=44218)
0.044934385 = queryNorm
0.27716863 = fieldWeight in 2226, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.017288 = idf(docFreq=795, maxDocs=44218)
0.0390625 = fieldNorm(doc=2226)
0.5 = coord(1/2)
0.5 = coord(1/2)