-
Costas, R.; Bordons, M.; Leeuwen, T.N. van; Raan, A.F.J. van: Scaling rules in the science system : Influence of field-specific citation characteristics on the impact of individual researchers (2009)
0.07
0.072532766 = product of:
0.14506553 = sum of:
0.13024011 = weight(_text_:van in 2759) [ClassicSimilarity], result of:
0.13024011 = score(doc=2759,freq=6.0), product of:
0.24408463 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.043769516 = queryNorm
0.5335859 = fieldWeight in 2759, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0390625 = fieldNorm(doc=2759)
0.014825413 = product of:
0.029650826 = sum of:
0.029650826 = weight(_text_:22 in 2759) [ClassicSimilarity], result of:
0.029650826 = score(doc=2759,freq=2.0), product of:
0.15327339 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.043769516 = queryNorm
0.19345059 = fieldWeight in 2759, 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=2759)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Date
- 22. 3.2009 19:02:48
- Footnote
- Vgl. auch: Raan, A.F.J. van: Scaling rules in the science system: influence of field-specific citation characteristics on the impact of research groups. In: Journal of the American Society for Information Science and Technology. 59(2008) no.4, S.565-576.
-
Costas, R.; Leeuwen, T.N. van; Raan, A.F.J. van: Is scientific literature subject to a 'Sell-By-Date'? : a general methodology to analyze the 'durability' of scientific documents (2010)
0.03
0.026585152 = product of:
0.10634061 = sum of:
0.10634061 = weight(_text_:van in 3333) [ClassicSimilarity], result of:
0.10634061 = score(doc=3333,freq=4.0), product of:
0.24408463 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.043769516 = queryNorm
0.43567106 = fieldWeight in 3333, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0390625 = fieldNorm(doc=3333)
0.25 = coord(1/4)
-
Costas, R.; Leeuwen, T.N. van; Bordons, M.: ¬A bibliometric classificatory approach for the study and assessment of research performance at the individual level : the effects of age on productivity and impact (2010)
0.02
0.02255825 = product of:
0.090233 = sum of:
0.090233 = weight(_text_:van in 3700) [ClassicSimilarity], result of:
0.090233 = score(doc=3700,freq=2.0), product of:
0.24408463 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.043769516 = queryNorm
0.36967915 = fieldWeight in 3700, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.046875 = fieldNorm(doc=3700)
0.25 = coord(1/4)
-
Costas, R.; Leeuwen, T.N. van: Approaching the "reward triangle" : general analysis of the presence of funding acknowledgments and "peer interactive communication" in scientific publications (2012)
0.02
0.018798541 = product of:
0.075194165 = sum of:
0.075194165 = weight(_text_:van in 363) [ClassicSimilarity], result of:
0.075194165 = score(doc=363,freq=2.0), product of:
0.24408463 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.043769516 = queryNorm
0.30806595 = fieldWeight in 363, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0390625 = fieldNorm(doc=363)
0.25 = coord(1/4)
-
Costas, R.; Leeuwen, T.N. van; Bordons, M.: Referencing patterns of individual researchers : do top scientists rely on more extensive information sources? (2012)
0.02
0.018798541 = product of:
0.075194165 = sum of:
0.075194165 = weight(_text_:van in 516) [ClassicSimilarity], result of:
0.075194165 = score(doc=516,freq=2.0), product of:
0.24408463 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.043769516 = queryNorm
0.30806595 = fieldWeight in 516, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0390625 = fieldNorm(doc=516)
0.25 = coord(1/4)
-
Waltman, L.; Costas, R.: F1000 Recommendations as a potential new data source for research evaluation : a comparison with citations (2014)
0.01
0.011459517 = product of:
0.04583807 = sum of:
0.04583807 = weight(_text_:l in 1212) [ClassicSimilarity], result of:
0.04583807 = score(doc=1212,freq=2.0), product of:
0.17396861 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.043769516 = queryNorm
0.26348472 = fieldWeight in 1212, 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=1212)
0.25 = coord(1/4)
-
Costas, R.; Zahedi, Z.; Wouters, P.: ¬The thematic orientation of publications mentioned on social media : large-scale disciplinary comparison of social media metrics with citations (2015)
0.00
0.0037063533 = product of:
0.014825413 = sum of:
0.014825413 = product of:
0.029650826 = sum of:
0.029650826 = weight(_text_:22 in 2598) [ClassicSimilarity], result of:
0.029650826 = score(doc=2598,freq=2.0), product of:
0.15327339 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.043769516 = queryNorm
0.19345059 = fieldWeight in 2598, 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=2598)
0.5 = coord(1/2)
0.25 = coord(1/4)
- Date
- 20. 1.2015 18:30:22
-
Costas, R.; Perianes-Rodríguez, A.; Ruiz-Castillo, J.: On the quest for currencies of science : field "exchange rates" for citations and Mendeley readership (2017)
0.00
0.0029650826 = product of:
0.011860331 = sum of:
0.011860331 = product of:
0.023720661 = sum of:
0.023720661 = weight(_text_:22 in 4051) [ClassicSimilarity], result of:
0.023720661 = score(doc=4051,freq=2.0), product of:
0.15327339 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.043769516 = queryNorm
0.15476047 = fieldWeight in 4051, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=4051)
0.5 = coord(1/2)
0.25 = coord(1/4)
- Date
- 20. 1.2015 18:30:22
