-
Marx, W.; Bornmann, L.: On the problems of dealing with bibliometric data (2014)
0.13
0.12619016 = product of:
0.2523803 = sum of:
0.2523803 = sum of:
0.09363073 = weight(_text_:l in 1239) [ClassicSimilarity], result of:
0.09363073 = score(doc=1239,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.52696943 = fieldWeight in 1239, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.09375 = fieldNorm(doc=1239)
0.08607037 = weight(_text_:w in 1239) [ClassicSimilarity], result of:
0.08607037 = score(doc=1239,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.5052462 = fieldWeight in 1239, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.09375 = fieldNorm(doc=1239)
0.07267919 = weight(_text_:22 in 1239) [ClassicSimilarity], result of:
0.07267919 = score(doc=1239,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = 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)
- Date
- 18. 3.2014 19:13:22
-
Su, Y.; Han, L.-F.: ¬A new literature growth model : variable exponential growth law of literature (1998)
0.05
0.05455962 = product of:
0.10911924 = sum of:
0.10911924 = product of:
0.16367885 = sum of:
0.07802561 = weight(_text_:l in 3690) [ClassicSimilarity], result of:
0.07802561 = score(doc=3690,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.4391412 = fieldWeight in 3690, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.078125 = fieldNorm(doc=3690)
0.08565325 = weight(_text_:22 in 3690) [ClassicSimilarity], result of:
0.08565325 = score(doc=3690,freq=4.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = 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)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 5.1999 19:22:35
-
Proceedings of the sixth conference of the International Society for Scientometrics and Informetrics (1997)
0.05
0.049916975 = product of:
0.09983395 = sum of:
0.09983395 = product of:
0.14975092 = sum of:
0.07802561 = weight(_text_:l in 1037) [ClassicSimilarity], result of:
0.07802561 = score(doc=1037,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.4391412 = fieldWeight in 1037, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.078125 = fieldNorm(doc=1037)
0.07172532 = weight(_text_:w in 1037) [ClassicSimilarity], result of:
0.07172532 = score(doc=1037,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.42103854 = fieldWeight in 1037, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.078125 = fieldNorm(doc=1037)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Editor
- Peritz, B.C., L. Egghe u. W. Glanzel
-
Proceedings of the sixth conference of the International Society for Scientometrics and Informetrics (1998)
0.05
0.049916975 = product of:
0.09983395 = sum of:
0.09983395 = product of:
0.14975092 = sum of:
0.07802561 = weight(_text_:l in 1038) [ClassicSimilarity], result of:
0.07802561 = score(doc=1038,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.4391412 = fieldWeight in 1038, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.078125 = fieldNorm(doc=1038)
0.07172532 = weight(_text_:w in 1038) [ClassicSimilarity], result of:
0.07172532 = score(doc=1038,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.42103854 = fieldWeight in 1038, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.078125 = fieldNorm(doc=1038)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Editor
- Peritz, B.C., L. Egghe u. W. Glanzel
-
Chongde, W.; Zhe, W.: Evaluation of the models for Bradford's law (1998)
0.04
0.043200247 = product of:
0.086400494 = sum of:
0.086400494 = product of:
0.12960073 = sum of:
0.08114793 = weight(_text_:w in 3688) [ClassicSimilarity], result of:
0.08114793 = score(doc=3688,freq=4.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.47635072 = fieldWeight in 3688, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0625 = fieldNorm(doc=3688)
0.048452795 = weight(_text_:22 in 3688) [ClassicSimilarity], result of:
0.048452795 = score(doc=3688,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = queryNorm
0.30952093 = fieldWeight in 3688, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=3688)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 5.1999 19:12:28
-
Egghe, L.; Liang, L.; Rousseau, R.: Fundamental properties of rhythm sequences (2008)
0.04
0.042483043 = product of:
0.084966086 = sum of:
0.084966086 = product of:
0.12744913 = sum of:
0.07724141 = weight(_text_:l in 1965) [ClassicSimilarity], result of:
0.07724141 = score(doc=1965,freq=4.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.4347276 = fieldWeight in 1965, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0546875 = fieldNorm(doc=1965)
0.05020772 = weight(_text_:w in 1965) [ClassicSimilarity], result of:
0.05020772 = score(doc=1965,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.29472697 = fieldWeight in 1965, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0546875 = fieldNorm(doc=1965)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- Fundamental mathematical properties of rhythm sequences are studied. In particular, a set of three axioms for valid rhythm indicators is proposed, and it is shown that the R-indicator satisfies only two out of three but that the R-indicator satisfies all three. This fills a critical, logical gap in the study of these indicator sequences. Matrices leading to a constant R-sequence are called baseline matrices. They are characterized as matrices with constant w-year diachronous impact factors. The relation with classical impact factors is clarified. Using regression analysis matrices with a rhythm sequence that is on average equal to 1 (smaller than 1, larger than 1) are characterized.
-
Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014)
0.04
0.042483043 = product of:
0.084966086 = sum of:
0.084966086 = product of:
0.12744913 = sum of:
0.07724141 = weight(_text_:l in 1238) [ClassicSimilarity], result of:
0.07724141 = score(doc=1238,freq=4.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.4347276 = fieldWeight in 1238, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0546875 = fieldNorm(doc=1238)
0.05020772 = weight(_text_:w in 1238) [ClassicSimilarity], result of:
0.05020772 = score(doc=1238,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.29472697 = fieldWeight in 1238, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0546875 = fieldNorm(doc=1238)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Zhang, L.; Rousseau, R.; Glänzel, W.: Document-type country profiles (2011)
0.04
0.03993358 = product of:
0.07986716 = sum of:
0.07986716 = product of:
0.11980074 = sum of:
0.062420487 = weight(_text_:l in 4487) [ClassicSimilarity], result of:
0.062420487 = score(doc=4487,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.35131297 = fieldWeight in 4487, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0625 = fieldNorm(doc=4487)
0.05738025 = weight(_text_:w in 4487) [ClassicSimilarity], result of:
0.05738025 = score(doc=4487,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.33683082 = fieldWeight in 4487, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0625 = fieldNorm(doc=4487)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Glänzel, W.; Rousseau, D.; Zhang, L.: ¬A visual representation of relative first-citation times (2012)
0.04
0.03993358 = product of:
0.07986716 = sum of:
0.07986716 = product of:
0.11980074 = sum of:
0.062420487 = weight(_text_:l in 285) [ClassicSimilarity], result of:
0.062420487 = score(doc=285,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.35131297 = fieldWeight in 285, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0625 = fieldNorm(doc=285)
0.05738025 = weight(_text_:w in 285) [ClassicSimilarity], result of:
0.05738025 = score(doc=285,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.33683082 = fieldWeight in 285, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0625 = fieldNorm(doc=285)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Zhang, L.; Thijs, B.; Glänzel, W.: What does scientometrics share with other "metrics" sciences? (2013)
0.04
0.03993358 = product of:
0.07986716 = sum of:
0.07986716 = product of:
0.11980074 = sum of:
0.062420487 = weight(_text_:l in 960) [ClassicSimilarity], result of:
0.062420487 = score(doc=960,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.35131297 = fieldWeight in 960, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0625 = fieldNorm(doc=960)
0.05738025 = weight(_text_:w in 960) [ClassicSimilarity], result of:
0.05738025 = score(doc=960,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.33683082 = fieldWeight in 960, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0625 = fieldNorm(doc=960)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Bornmann, L.; Mutz, R.: From P100 to P100' : a new citation-rank approach (2014)
0.04
0.036957763 = product of:
0.073915526 = sum of:
0.073915526 = product of:
0.11087328 = sum of:
0.062420487 = weight(_text_:l in 1431) [ClassicSimilarity], result of:
0.062420487 = score(doc=1431,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.35131297 = fieldWeight in 1431, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0625 = fieldNorm(doc=1431)
0.048452795 = weight(_text_:22 in 1431) [ClassicSimilarity], result of:
0.048452795 = score(doc=1431,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = queryNorm
0.30952093 = fieldWeight in 1431, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1431)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 8.2014 17:05:18
-
Leydesdorff, L.; Radicchi, F.; Bornmann, L.; Castellano, C.; Nooy, W. de: Field-normalized impact factors (IFs) : a comparison of rescaling and fractionally counted IFs (2013)
0.04
0.03641404 = product of:
0.07282808 = sum of:
0.07282808 = product of:
0.10924211 = sum of:
0.066206925 = weight(_text_:l in 1108) [ClassicSimilarity], result of:
0.066206925 = score(doc=1108,freq=4.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.37262368 = fieldWeight in 1108, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=1108)
0.043035187 = weight(_text_:w in 1108) [ClassicSimilarity], result of:
0.043035187 = score(doc=1108,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.2526231 = fieldWeight in 1108, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.046875 = fieldNorm(doc=1108)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Bornmann, L.; Marx, W.: Distributions instead of single numbers : percentiles and beam plots for the assessment of single researchers (2014)
0.03
0.034941882 = product of:
0.069883764 = sum of:
0.069883764 = product of:
0.104825646 = sum of:
0.054617926 = weight(_text_:l in 1190) [ClassicSimilarity], result of:
0.054617926 = score(doc=1190,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.30739886 = fieldWeight in 1190, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0546875 = fieldNorm(doc=1190)
0.05020772 = weight(_text_:w in 1190) [ClassicSimilarity], result of:
0.05020772 = score(doc=1190,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.29472697 = fieldWeight in 1190, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0546875 = fieldNorm(doc=1190)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Bornmann, L.; Marx, W.: ¬The wisdom of citing scientists (2014)
0.03
0.034941882 = product of:
0.069883764 = sum of:
0.069883764 = product of:
0.104825646 = sum of:
0.054617926 = weight(_text_:l in 1293) [ClassicSimilarity], result of:
0.054617926 = score(doc=1293,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.30739886 = fieldWeight in 1293, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0546875 = fieldNorm(doc=1293)
0.05020772 = weight(_text_:w in 1293) [ClassicSimilarity], result of:
0.05020772 = score(doc=1293,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.29472697 = fieldWeight in 1293, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0546875 = fieldNorm(doc=1293)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Tang, L.; Hu, G.; Liu, W.: Funding acknowledgment analysis : queries and caveats (2017)
0.03
0.034941882 = product of:
0.069883764 = sum of:
0.069883764 = product of:
0.104825646 = sum of:
0.054617926 = weight(_text_:l in 3442) [ClassicSimilarity], result of:
0.054617926 = score(doc=3442,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.30739886 = fieldWeight in 3442, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0546875 = fieldNorm(doc=3442)
0.05020772 = weight(_text_:w in 3442) [ClassicSimilarity], result of:
0.05020772 = score(doc=3442,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.29472697 = fieldWeight in 3442, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0546875 = fieldNorm(doc=3442)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019)
0.03
0.034182176 = product of:
0.06836435 = sum of:
0.06836435 = product of:
0.10254652 = sum of:
0.066206925 = weight(_text_:l in 4681) [ClassicSimilarity], result of:
0.066206925 = score(doc=4681,freq=4.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.37262368 = fieldWeight in 4681, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=4681)
0.036339596 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
0.036339596 = score(doc=4681,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = queryNorm
0.23214069 = fieldWeight in 4681, 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=4681)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 8. 1.2019 18:22:45
-
Leydesdorff, L.; Bornmann, L.; Mingers, J.: Statistical significance and effect sizes of differences among research universities at the level of nations and worldwide based on the Leiden rankings (2019)
0.03
0.030345034 = product of:
0.060690068 = sum of:
0.060690068 = product of:
0.0910351 = sum of:
0.055172436 = weight(_text_:l in 5225) [ClassicSimilarity], result of:
0.055172436 = score(doc=5225,freq=4.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.31051973 = fieldWeight in 5225, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0390625 = fieldNorm(doc=5225)
0.03586266 = weight(_text_:w in 5225) [ClassicSimilarity], result of:
0.03586266 = score(doc=5225,freq=2.0), product of:
0.17035332 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.044702705 = queryNorm
0.21051927 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0390625 = fieldNorm(doc=5225)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- The Leiden Rankings can be used for grouping research universities by considering universities which are not statistically significantly different as homogeneous sets. The groups and intergroup relations can be analyzed and visualized using tools from network analysis. Using the so-called "excellence indicator" PPtop-10%-the proportion of the top-10% most-highly-cited papers assigned to a university-we pursue a classification using (a) overlapping stability intervals, (b) statistical-significance tests, and (c) effect sizes of differences among 902 universities in 54 countries; we focus on the UK, Germany, Brazil, and the USA as national examples. Although the groupings remain largely the same using different statistical significance levels or overlapping stability intervals, these classifications are uncorrelated with those based on effect sizes. Effect sizes for the differences between universities are small (w < .2). The more detailed analysis of universities at the country level suggests that distinctions beyond three or perhaps four groups of universities (high, middle, low) may not be meaningful. Given similar institutional incentives, isomorphism within each eco-system of universities should not be underestimated. Our results suggest that networks based on overlapping stability intervals can provide a first impression of the relevant groupings among universities. However, the clusters are not well-defined divisions between groups of universities.
-
Leydesdorff, L.; Bornmann, L.: How fractional counting of citations affects the impact factor : normalization in terms of differences in citation potentials among fields of science (2011)
0.03
0.028485145 = product of:
0.05697029 = sum of:
0.05697029 = product of:
0.08545543 = sum of:
0.055172436 = weight(_text_:l in 4186) [ClassicSimilarity], result of:
0.055172436 = score(doc=4186,freq=4.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.31051973 = fieldWeight in 4186, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0390625 = fieldNorm(doc=4186)
0.030282998 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
0.030282998 = score(doc=4186,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = queryNorm
0.19345059 = fieldWeight in 4186, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=4186)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 1.2011 12:51:07
-
Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996)
0.03
0.02771832 = product of:
0.05543664 = sum of:
0.05543664 = product of:
0.08315496 = sum of:
0.046815366 = weight(_text_:l in 7659) [ClassicSimilarity], result of:
0.046815366 = score(doc=7659,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.26348472 = fieldWeight in 7659, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=7659)
0.036339596 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
0.036339596 = score(doc=7659,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = 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
-
Leydesdorff, L.: Can networks of journal-journal citations be used as indicators of change in the social sciences? (2003)
0.03
0.02771832 = product of:
0.05543664 = sum of:
0.05543664 = product of:
0.08315496 = sum of:
0.046815366 = weight(_text_:l in 4460) [ClassicSimilarity], result of:
0.046815366 = score(doc=4460,freq=2.0), product of:
0.17767772 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.044702705 = queryNorm
0.26348472 = fieldWeight in 4460, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=4460)
0.036339596 = weight(_text_:22 in 4460) [ClassicSimilarity], result of:
0.036339596 = score(doc=4460,freq=2.0), product of:
0.15654126 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044702705 = queryNorm
0.23214069 = fieldWeight in 4460, 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=4460)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 6.11.2005 19:02:22
