-
Marx, W.; Bornmann, L.: On the problems of dealing with bibliometric data (2014)
0.08
0.084388465 = product of:
0.16877693 = sum of:
0.16877693 = sum of:
0.09501962 = weight(_text_:l in 1239) [ClassicSimilarity], result of:
0.09501962 = score(doc=1239,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = 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)
0.0737573 = weight(_text_:22 in 1239) [ClassicSimilarity], result of:
0.0737573 = score(doc=1239,freq=2.0), product of:
0.15886335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045365814 = 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
-
Bornmann, L.; Mutz, R.: From P100 to P100' : a new citation-rank approach (2014)
0.06
0.056258976 = product of:
0.11251795 = sum of:
0.11251795 = sum of:
0.063346416 = weight(_text_:l in 1431) [ClassicSimilarity], result of:
0.063346416 = score(doc=1431,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = 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)
0.049171533 = weight(_text_:22 in 1431) [ClassicSimilarity], result of:
0.049171533 = score(doc=1431,freq=2.0), product of:
0.15886335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045365814 = 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)
0.5 = coord(1/2)
- Date
- 22. 8.2014 17:05:18
-
Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019)
0.05
0.052033834 = product of:
0.10406767 = sum of:
0.10406767 = sum of:
0.06718902 = weight(_text_:l in 4681) [ClassicSimilarity], result of:
0.06718902 = score(doc=4681,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = 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)
0.03687865 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
0.03687865 = score(doc=4681,freq=2.0), product of:
0.15886335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045365814 = 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)
0.5 = coord(1/2)
- Date
- 8. 1.2019 18:22:45
-
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)
0.04
0.04336153 = product of:
0.08672306 = sum of:
0.08672306 = sum of:
0.055990852 = weight(_text_:l in 4186) [ClassicSimilarity], result of:
0.055990852 = score(doc=4186,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = 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)
0.030732209 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
0.030732209 = score(doc=4186,freq=2.0), product of:
0.15886335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045365814 = 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)
0.5 = coord(1/2)
- Date
- 22. 1.2011 12:51:07
-
Bornmann, L.: How to analyze percentile citation impact data meaningfully in bibliometrics : the statistical analysis of distributions, percentile rank classes, and top-cited papers (2013)
0.04
0.042194232 = product of:
0.084388465 = sum of:
0.084388465 = sum of:
0.04750981 = weight(_text_:l in 656) [ClassicSimilarity], result of:
0.04750981 = score(doc=656,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.26348472 = fieldWeight in 656, 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=656)
0.03687865 = weight(_text_:22 in 656) [ClassicSimilarity], result of:
0.03687865 = score(doc=656,freq=2.0), product of:
0.15886335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045365814 = queryNorm
0.23214069 = fieldWeight in 656, 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=656)
0.5 = coord(1/2)
- Date
- 22. 3.2013 19:44:17
-
Bornmann, L.: On the function of university rankings (2014)
0.02
0.023754906 = product of:
0.04750981 = sum of:
0.04750981 = product of:
0.09501962 = sum of:
0.09501962 = weight(_text_:l in 1188) [ClassicSimilarity], result of:
0.09501962 = score(doc=1188,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.52696943 = fieldWeight in 1188, 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=1188)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.: Is there currently a scientific revolution in Scientometrics? (2014)
0.02
0.023754906 = product of:
0.04750981 = sum of:
0.04750981 = product of:
0.09501962 = sum of:
0.09501962 = weight(_text_:l in 1206) [ClassicSimilarity], result of:
0.09501962 = score(doc=1206,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.52696943 = fieldWeight in 1206, 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=1206)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.; Bauer, J.; Haunschild, R.: Distribution of women and men among highly cited scientists (2015)
0.02
0.023754906 = product of:
0.04750981 = sum of:
0.04750981 = product of:
0.09501962 = sum of:
0.09501962 = weight(_text_:l in 2349) [ClassicSimilarity], result of:
0.09501962 = score(doc=2349,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.52696943 = fieldWeight in 2349, 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=2349)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.: What do altmetrics counts mean? : a plea for content analyses (2016)
0.02
0.023754906 = product of:
0.04750981 = sum of:
0.04750981 = product of:
0.09501962 = sum of:
0.09501962 = weight(_text_:l in 2858) [ClassicSimilarity], result of:
0.09501962 = score(doc=2858,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.52696943 = fieldWeight in 2858, 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=2858)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.: Nature's top 100 revisited (2015)
0.02
0.019795755 = product of:
0.03959151 = sum of:
0.03959151 = product of:
0.07918302 = sum of:
0.07918302 = weight(_text_:l in 2351) [ClassicSimilarity], result of:
0.07918302 = score(doc=2351,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.4391412 = fieldWeight in 2351, 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=2351)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014)
0.02
0.019596798 = product of:
0.039193597 = sum of:
0.039193597 = product of:
0.07838719 = sum of:
0.07838719 = weight(_text_:l in 1238) [ClassicSimilarity], result of:
0.07838719 = score(doc=1238,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = 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)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.; Leydesdorff, L.: Which cities produce more excellent papers than can be expected? : a new mapping approach, using Google Maps, based on statistical significance testing (2011)
0.02
0.016797256 = product of:
0.03359451 = sum of:
0.03359451 = product of:
0.06718902 = sum of:
0.06718902 = weight(_text_:l in 4767) [ClassicSimilarity], result of:
0.06718902 = score(doc=4767,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.37262368 = fieldWeight in 4767, 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=4767)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
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)
0.02
0.016797256 = product of:
0.03359451 = sum of:
0.03359451 = product of:
0.06718902 = sum of:
0.06718902 = weight(_text_:l in 1108) [ClassicSimilarity], result of:
0.06718902 = score(doc=1108,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = 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)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Leydesdorff, L.; Bornmann, L.: ¬The operationalization of "fields" as WoS subject categories (WCs) in evaluative bibliometrics : the cases of "library and information science" and "science & technology studies" (2016)
0.02
0.016797256 = product of:
0.03359451 = sum of:
0.03359451 = product of:
0.06718902 = sum of:
0.06718902 = weight(_text_:l in 2779) [ClassicSimilarity], result of:
0.06718902 = score(doc=2779,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.37262368 = fieldWeight in 2779, 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=2779)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.; Bauer, J.: Which of the world's institutions employ the most highly cited researchers : an analysis of the data from highlycited.com (2015)
0.02
0.015836604 = product of:
0.031673208 = sum of:
0.031673208 = product of:
0.063346416 = sum of:
0.063346416 = weight(_text_:l in 1556) [ClassicSimilarity], result of:
0.063346416 = score(doc=1556,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.35131297 = fieldWeight in 1556, 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=1556)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.; Bauer, J.: Which of the world's institutions employ the most highly cited researchers : an analysis of the data from highlycited.com (2015)
0.02
0.015836604 = product of:
0.031673208 = sum of:
0.031673208 = product of:
0.063346416 = sum of:
0.063346416 = weight(_text_:l in 2223) [ClassicSimilarity], result of:
0.063346416 = score(doc=2223,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.35131297 = fieldWeight in 2223, 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=2223)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.; Mutz, R.; Daniel, H.D.: Do we need the h index and its variants in addition to standard bibliometric measures? (2009)
0.01
0.013997713 = product of:
0.027995426 = sum of:
0.027995426 = product of:
0.055990852 = sum of:
0.055990852 = weight(_text_:l in 2861) [ClassicSimilarity], result of:
0.055990852 = score(doc=2861,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.31051973 = fieldWeight in 2861, 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=2861)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- In this study, we investigate whether there is a need for the h index and its variants in addition to standard bibliometric measures (SBMs). Results from our recent study (L. Bornmann, R. Mutz, & H.-D. Daniel, 2008) have indicated that there are two types of indices: One type of indices (e.g., h index) describes the most productive core of a scientist's output and informs about the number of papers in the core. The other type of indices (e.g., a index) depicts the impact of the papers in the core. In evaluative bibliometric studies, the two dimensions quantity and quality of output are usually assessed using the SBMs number of publications (for the quantity dimension) and total citation counts (for the impact dimension). We additionally included the SBMs into the factor analysis. The results of the newly calculated analysis indicate that there is a high intercorrelation between number of publications and the indices that load substantially on the factor Quantity of the Productive Core as well as between total citation counts and the indices that load substantially on the factor Impact of the Productive Core. The high-loading indices and SBMs within one performance dimension could be called redundant in empirical application, as high intercorrelations between different indicators are a sign for measuring something similar (or the same). Based on our findings, we propose the use of any pair of indicators (one relating to the number of papers in a researcher's productive core and one relating to the impact of these core papers) as a meaningful approach for comparing scientists.
-
Leydesdorff, L.; Bornmann, L.: Integrated impact indicators compared with impact factors : an alternative research design with policy implications (2011)
0.01
0.013997713 = product of:
0.027995426 = sum of:
0.027995426 = product of:
0.055990852 = sum of:
0.055990852 = weight(_text_:l in 4919) [ClassicSimilarity], result of:
0.055990852 = score(doc=4919,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.31051973 = fieldWeight in 4919, 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=4919)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Leydesdorff, L.; Zhou, P.; Bornmann, L.: How can journal impact factors be normalized across fields of science? : An assessment in terms of percentile ranks and fractional counts (2013)
0.01
0.013997713 = product of:
0.027995426 = sum of:
0.027995426 = product of:
0.055990852 = sum of:
0.055990852 = weight(_text_:l in 532) [ClassicSimilarity], result of:
0.055990852 = score(doc=532,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.31051973 = fieldWeight in 532, 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=532)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Bornmann, L.; Wagner, C.; Leydesdorff, L.: BRICS countries and scientific excellence : a bibliometric analysis of most frequently cited papers (2015)
0.01
0.013997713 = product of:
0.027995426 = sum of:
0.027995426 = product of:
0.055990852 = sum of:
0.055990852 = weight(_text_:l in 2047) [ClassicSimilarity], result of:
0.055990852 = score(doc=2047,freq=4.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.31051973 = fieldWeight in 2047, 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=2047)
0.5 = coord(1/2)
0.5 = coord(1/2)
