-
Shi, D.; Rousseau, R.; Yang, L.; Li, J.: ¬A journal's impact factor is influenced by changes in publication delays of citing journals (2017)
0.00
0.0012212053 = product of:
0.012212053 = sum of:
0.012212053 = product of:
0.03663616 = sum of:
0.03663616 = weight(_text_:problem in 3441) [ClassicSimilarity], result of:
0.03663616 = score(doc=3441,freq=2.0), product of:
0.1302053 = queryWeight, product of:
4.244485 = idf(docFreq=1723, maxDocs=44218)
0.03067635 = queryNorm
0.28137225 = fieldWeight in 3441, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.244485 = idf(docFreq=1723, maxDocs=44218)
0.046875 = fieldNorm(doc=3441)
0.33333334 = coord(1/3)
0.1 = coord(1/10)
- Abstract
- In this article we describe another problem with journal impact factors by showing that one journal's impact factor is dependent on other journals' publication delays. The proposed theoretical model predicts a monotonically decreasing function of the impact factor as a function of publication delay, on condition that the citation curve of the journal is monotone increasing during the publication window used in the calculation of the journal impact factor; otherwise, this function has a reversed U shape. Our findings based on simulations are verified by examining three journals in the information sciences: the Journal of Informetrics, Scientometrics, and the Journal of the Association for Information Science and Technology.
-
Zhu, Q.; Kong, X.; Hong, S.; Li, J.; He, Z.: Global ontology research progress : a bibliometric analysis (2015)
0.00
9.79631E-4 = product of:
0.009796309 = sum of:
0.009796309 = product of:
0.029388927 = sum of:
0.029388927 = weight(_text_:22 in 2590) [ClassicSimilarity], result of:
0.029388927 = score(doc=2590,freq=4.0), product of:
0.10742335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03067635 = queryNorm
0.27358043 = fieldWeight in 2590, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2590)
0.33333334 = coord(1/3)
0.1 = coord(1/10)
- Date
- 20. 1.2015 18:30:22
17. 9.2018 18:22:23
-
Li, J.; Shi, D.: Sleeping beauties in genius work : when were they awakened? (2016)
0.00
8.3124434E-4 = product of:
0.008312443 = sum of:
0.008312443 = product of:
0.02493733 = sum of:
0.02493733 = weight(_text_:22 in 2647) [ClassicSimilarity], result of:
0.02493733 = score(doc=2647,freq=2.0), product of:
0.10742335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03067635 = queryNorm
0.23214069 = fieldWeight in 2647, 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=2647)
0.33333334 = coord(1/3)
0.1 = coord(1/10)
- Date
- 22. 1.2016 14:13:32