Document (#34760)

Author

Costas, R.
Bordons, M.
Leeuwen, T.N. van
Raan, A.F.J. van

Title

Scaling rules in the science system : Influence of field-specific citation characteristics on the impact of individual researchers

Source

Journal of the American Society for Information Science and Technology. 60(2009) no.4, S.740-753

Year

2009

Abstract

The representation of science as a citation density landscape and the study of scaling rules with the field-specific citation density as a main topological property was previously analyzed at the level of research groups. Here, the focus is on the individual researcher. In this new analysis, the size dependence of several main bibliometric indicators for a large set of individual researchers is explored. Similar results as those previously observed for research groups are described for individual researchers. The total number of citations received by scientists increases in a cumulatively advantageous way as a function of size (in terms of number of publications) for researchers in three areas: Natural Resources, Biology & Biomedicine, and Materials Science. This effect is stronger for researchers in low citation density fields. Differences found among thematic areas with different citation densities are discussed.

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.

Theme

Informetrie

Similar documents (author)

1. 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) 3.84

   3.8366761 = sum of:
     3.8366761 = product of:
       4.795845 = sum of:
         1.1300974 = weight(author_txt:costas in 3333) [ClassicSimilarity], result of:
           1.1300974 = score(doc=3333,freq=1.0), product of:
             0.41064045 = queryWeight, product of:
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.04662916 = queryNorm
             2.752036 = fieldWeight in 3333, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.3125 = fieldNorm(doc=3333)
         1.1760497 = weight(author_txt:raan in 3333) [ClassicSimilarity], result of:
           1.1760497 = score(doc=3333,freq=1.0), product of:
             0.42169806 = queryWeight, product of:
               1.0133744 = boost
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.04662916 = queryNorm
             2.7888432 = fieldWeight in 3333, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.3125 = fieldNorm(doc=3333)
         1.2296343 = weight(author_txt:a.f.j in 3333) [ClassicSimilarity], result of:
           1.2296343 = score(doc=3333,freq=1.0), product of:
             0.43441197 = queryWeight, product of:
               1.0285373 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.04662916 = queryNorm
             2.830572 = fieldWeight in 3333, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.3125 = fieldNorm(doc=3333)
         1.2600634 = weight(author_txt:leeuwen in 3333) [ClassicSimilarity], result of:
           1.2600634 = score(doc=3333,freq=1.0), product of:
             0.44154954 = queryWeight, product of:
               1.0369525 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.04662916 = queryNorm
             2.8537307 = fieldWeight in 3333, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.3125 = fieldNorm(doc=3333)
       0.8 = coord(4/5)
   

2. 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) 2.88

   2.8786695 = sum of:
     2.8786695 = product of:
       4.7977824 = sum of:
         1.3561169 = weight(author_txt:costas in 3700) [ClassicSimilarity], result of:
           1.3561169 = score(doc=3700,freq=1.0), product of:
             0.41064045 = queryWeight, product of:
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.04662916 = queryNorm
             3.3024435 = fieldWeight in 3700, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.375 = fieldNorm(doc=3700)
         1.512076 = weight(author_txt:leeuwen in 3700) [ClassicSimilarity], result of:
           1.512076 = score(doc=3700,freq=1.0), product of:
             0.44154954 = queryWeight, product of:
               1.0369525 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.04662916 = queryNorm
             3.4244766 = fieldWeight in 3700, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.375 = fieldNorm(doc=3700)
         1.9295895 = weight(author_txt:bordons in 3700) [ClassicSimilarity], result of:
           1.9295895 = score(doc=3700,freq=1.0), product of:
             0.5194857 = queryWeight, product of:
               1.1247499 = boost
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.04662916 = queryNorm
             3.7144227 = fieldWeight in 3700, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.375 = fieldNorm(doc=3700)
       0.6 = coord(3/5)
   

3. Costas, R.; Leeuwen, T.N. van; Bordons, M.: Referencing patterns of individual researchers : do top scientists rely on more extensive information sources? (2012) 2.88

   2.8786695 = sum of:
     2.8786695 = product of:
       4.7977824 = sum of:
         1.3561169 = weight(author_txt:costas in 516) [ClassicSimilarity], result of:
           1.3561169 = score(doc=516,freq=1.0), product of:
             0.41064045 = queryWeight, product of:
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.04662916 = queryNorm
             3.3024435 = fieldWeight in 516, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.375 = fieldNorm(doc=516)
         1.512076 = weight(author_txt:leeuwen in 516) [ClassicSimilarity], result of:
           1.512076 = score(doc=516,freq=1.0), product of:
             0.44154954 = queryWeight, product of:
               1.0369525 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.04662916 = queryNorm
             3.4244766 = fieldWeight in 516, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.375 = fieldNorm(doc=516)
         1.9295895 = weight(author_txt:bordons in 516) [ClassicSimilarity], result of:
           1.9295895 = score(doc=516,freq=1.0), product of:
             0.5194857 = queryWeight, product of:
               1.1247499 = boost
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.04662916 = queryNorm
             3.7144227 = fieldWeight in 516, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.375 = fieldNorm(doc=516)
       0.6 = coord(3/5)
   

4. Raan, A.F.J. van: Scientometrics : state of the art (1997) 1.54

   1.5396378 = sum of:
     1.5396378 = product of:
       3.8490944 = sum of:
         1.8816797 = weight(author_txt:raan in 409) [ClassicSimilarity], result of:
           1.8816797 = score(doc=409,freq=1.0), product of:
             0.42169806 = queryWeight, product of:
               1.0133744 = boost
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.04662916 = queryNorm
             4.462149 = fieldWeight in 409, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.5 = fieldNorm(doc=409)
         1.9674149 = weight(author_txt:a.f.j in 409) [ClassicSimilarity], result of:
           1.9674149 = score(doc=409,freq=1.0), product of:
             0.43441197 = queryWeight, product of:
               1.0285373 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.04662916 = queryNorm
             4.528915 = fieldWeight in 409, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.5 = fieldNorm(doc=409)
       0.4 = coord(2/5)
   

5. Raan, A.F.J. van: ¬The influence of international collaboration on the impact of research results (1998) 1.54

   1.5396378 = sum of:
     1.5396378 = product of:
       3.8490944 = sum of:
         1.8816797 = weight(author_txt:raan in 5120) [ClassicSimilarity], result of:
           1.8816797 = score(doc=5120,freq=1.0), product of:
             0.42169806 = queryWeight, product of:
               1.0133744 = boost
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.04662916 = queryNorm
             4.462149 = fieldWeight in 5120, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.5 = fieldNorm(doc=5120)
         1.9674149 = weight(author_txt:a.f.j in 5120) [ClassicSimilarity], result of:
           1.9674149 = score(doc=5120,freq=1.0), product of:
             0.43441197 = queryWeight, product of:
               1.0285373 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.04662916 = queryNorm
             4.528915 = fieldWeight in 5120, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.5 = fieldNorm(doc=5120)
       0.4 = coord(2/5)
   

Similar documents (content)

1. Raan, A.F.J. van: Scaling rules in the science system : influence of field-specific citation characteristics on the impact of research groups (2008) 0.92

   0.9176814 = sum of:
     0.9176814 = product of:
       1.7647719 = sum of:
         0.121485606 = weight(abstract_txt:landscape in 2758) [ClassicSimilarity], result of:
           0.121485606 = score(doc=2758,freq=2.0), product of:
             0.12956914 = queryWeight, product of:
               1.0308003 = boost
               7.071914 = idf(docFreq=101, maxDocs=44218)
               0.0177742 = queryNorm
             0.9376122 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.071914 = idf(docFreq=101, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.100948766 = weight(abstract_txt:dependence in 2758) [ClassicSimilarity], result of:
           0.100948766 = score(doc=2758,freq=1.0), product of:
             0.1442876 = queryWeight, product of:
               1.087773 = boost
               7.462781 = idf(docFreq=68, maxDocs=44218)
               0.0177742 = queryNorm
             0.69963574 = fieldWeight in 2758, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.462781 = idf(docFreq=68, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.18536747 = weight(abstract_txt:topological in 2758) [ClassicSimilarity], result of:
           0.18536747 = score(doc=2758,freq=2.0), product of:
             0.17172784 = queryWeight, product of:
               1.1867087 = boost
               8.14154 = idf(docFreq=34, maxDocs=44218)
               0.0177742 = queryNorm
             1.0794258 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.14154 = idf(docFreq=34, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.039004244 = weight(abstract_txt:specific in 2758) [ClassicSimilarity], result of:
           0.039004244 = score(doc=2758,freq=1.0), product of:
             0.096437566 = queryWeight, product of:
               1.257656 = boost
               4.314141 = idf(docFreq=1607, maxDocs=44218)
               0.0177742 = queryNorm
             0.4044507 = fieldWeight in 2758, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.314141 = idf(docFreq=1607, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.04402979 = weight(abstract_txt:field in 2758) [ClassicSimilarity], result of:
           0.04402979 = score(doc=2758,freq=1.0), product of:
             0.1045529 = queryWeight, product of:
               1.3095039 = boost
               4.491995 = idf(docFreq=1345, maxDocs=44218)
               0.0177742 = queryNorm
             0.42112452 = fieldWeight in 2758, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.491995 = idf(docFreq=1345, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.06742151 = weight(abstract_txt:main in 2758) [ClassicSimilarity], result of:
           0.06742151 = score(doc=2758,freq=2.0), product of:
             0.11024545 = queryWeight, product of:
               1.3446804 = boost
               4.612661 = idf(docFreq=1192, maxDocs=44218)
               0.0177742 = queryNorm
             0.6115582 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.612661 = idf(docFreq=1192, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.091114685 = weight(abstract_txt:groups in 2758) [ClassicSimilarity], result of:
           0.091114685 = score(doc=2758,freq=2.0), product of:
             0.13475782 = queryWeight, product of:
               1.486674 = boost
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0177742 = queryNorm
             0.67613655 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.06977059 = weight(abstract_txt:rules in 2758) [ClassicSimilarity], result of:
           0.06977059 = score(doc=2758,freq=1.0), product of:
             0.14210847 = queryWeight, product of:
               1.5266825 = boost
               5.236983 = idf(docFreq=638, maxDocs=44218)
               0.0177742 = queryNorm
             0.49096715 = fieldWeight in 2758, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.236983 = idf(docFreq=638, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.05930688 = weight(abstract_txt:science in 2758) [ClassicSimilarity], result of:
           0.05930688 = score(doc=2758,freq=2.0), product of:
             0.11585875 = queryWeight, product of:
               1.6882968 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0177742 = queryNorm
             0.5118895 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.099501416 = weight(abstract_txt:size in 2758) [ClassicSimilarity], result of:
           0.099501416 = score(doc=2758,freq=1.0), product of:
             0.1800492 = queryWeight, product of:
               1.7184398 = boost
               5.8947687 = idf(docFreq=330, maxDocs=44218)
               0.0177742 = queryNorm
             0.5526346 = fieldWeight in 2758, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8947687 = idf(docFreq=330, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.19520548 = weight(abstract_txt:scaling in 2758) [ClassicSimilarity], result of:
           0.19520548 = score(doc=2758,freq=1.0), product of:
             0.28216276 = queryWeight, product of:
               2.1512387 = boost
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0177742 = queryNorm
             0.6918187 = fieldWeight in 2758, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.48996502 = weight(abstract_txt:density in 2758) [ClassicSimilarity], result of:
           0.48996502 = score(doc=2758,freq=2.0), product of:
             0.47348058 = queryWeight, product of:
               3.4129934 = boost
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0177742 = queryNorm
             1.0348154 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
         0.20165032 = weight(abstract_txt:citation in 2758) [ClassicSimilarity], result of:
           0.20165032 = score(doc=2758,freq=2.0), product of:
             0.31060442 = queryWeight, product of:
               3.5687208 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0177742 = queryNorm
             0.6492191 = fieldWeight in 2758, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.09375 = fieldNorm(doc=2758)
       0.52 = coord(13/25)
   

2. Raan, A.F.J. van: Bibliometric statistical properties of the 100 largest European research universities : prevalent scaling rules in the science system (2008) 0.33

   0.33345747 = sum of:
     0.33345747 = product of:
       1.0420547 = sum of:
         0.034641117 = weight(abstract_txt:number in 1372) [ClassicSimilarity], result of:
           0.034641117 = score(doc=1372,freq=3.0), product of:
             0.088494174 = queryWeight, product of:
               1.2047477 = boost
               4.132649 = idf(docFreq=1927, maxDocs=44218)
               0.0177742 = queryNorm
             0.39145082 = fieldWeight in 1372, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.132649 = idf(docFreq=1927, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.051368088 = weight(abstract_txt:field in 1372) [ClassicSimilarity], result of:
           0.051368088 = score(doc=1372,freq=4.0), product of:
             0.1045529 = queryWeight, product of:
               1.3095039 = boost
               4.491995 = idf(docFreq=1345, maxDocs=44218)
               0.0177742 = queryNorm
             0.49131194 = fieldWeight in 1372, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.491995 = idf(docFreq=1345, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.03758289 = weight(abstract_txt:groups in 1372) [ClassicSimilarity], result of:
           0.03758289 = score(doc=1372,freq=1.0), product of:
             0.13475782 = queryWeight, product of:
               1.486674 = boost
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0177742 = queryNorm
             0.2788921 = fieldWeight in 1372, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.03459568 = weight(abstract_txt:science in 1372) [ClassicSimilarity], result of:
           0.03459568 = score(doc=1372,freq=2.0), product of:
             0.11585875 = queryWeight, product of:
               1.6882968 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0177742 = queryNorm
             0.29860222 = fieldWeight in 1372, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.11608498 = weight(abstract_txt:size in 1372) [ClassicSimilarity], result of:
           0.11608498 = score(doc=1372,freq=4.0), product of:
             0.1800492 = queryWeight, product of:
               1.7184398 = boost
               5.8947687 = idf(docFreq=330, maxDocs=44218)
               0.0177742 = queryNorm
             0.64474034 = fieldWeight in 1372, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.8947687 = idf(docFreq=330, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.19722837 = weight(abstract_txt:scaling in 1372) [ClassicSimilarity], result of:
           0.19722837 = score(doc=1372,freq=3.0), product of:
             0.28216276 = queryWeight, product of:
               2.1512387 = boost
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0177742 = queryNorm
             0.69898796 = fieldWeight in 1372, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.40420052 = weight(abstract_txt:density in 1372) [ClassicSimilarity], result of:
           0.40420052 = score(doc=1372,freq=4.0), product of:
             0.47348058 = queryWeight, product of:
               3.4129934 = boost
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0177742 = queryNorm
             0.8536792 = fieldWeight in 1372, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
         0.16635303 = weight(abstract_txt:citation in 1372) [ClassicSimilarity], result of:
           0.16635303 = score(doc=1372,freq=4.0), product of:
             0.31060442 = queryWeight, product of:
               3.5687208 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0177742 = queryNorm
             0.5355784 = fieldWeight in 1372, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1372)
       0.32 = coord(8/25)
   

3. Raan, A.F.J. van: Self-citation as an impact-reinforcing mechanism in the science system (2008) 0.30

   0.29554442 = sum of:
     0.29554442 = product of:
       0.9235763 = sum of:
         0.074691676 = weight(abstract_txt:stronger in 2006) [ClassicSimilarity], result of:
           0.074691676 = score(doc=2006,freq=1.0), product of:
             0.15466926 = queryWeight, product of:
               1.1262265 = boost
               7.7265954 = idf(docFreq=52, maxDocs=44218)
               0.0177742 = queryNorm
             0.4829122 = fieldWeight in 2006, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7265954 = idf(docFreq=52, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.02285721 = weight(abstract_txt:number in 2006) [ClassicSimilarity], result of:
           0.02285721 = score(doc=2006,freq=1.0), product of:
             0.088494174 = queryWeight, product of:
               1.2047477 = boost
               4.132649 = idf(docFreq=1927, maxDocs=44218)
               0.0177742 = queryNorm
             0.25829056 = fieldWeight in 2006, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.132649 = idf(docFreq=1927, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.121486254 = weight(abstract_txt:groups in 2006) [ClassicSimilarity], result of:
           0.121486254 = score(doc=2006,freq=8.0), product of:
             0.13475782 = queryWeight, product of:
               1.486674 = boost
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0177742 = queryNorm
             0.9015154 = fieldWeight in 2006, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.046513725 = weight(abstract_txt:rules in 2006) [ClassicSimilarity], result of:
           0.046513725 = score(doc=2006,freq=1.0), product of:
             0.14210847 = queryWeight, product of:
               1.5266825 = boost
               5.236983 = idf(docFreq=638, maxDocs=44218)
               0.0177742 = queryNorm
             0.32731143 = fieldWeight in 2006, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.236983 = idf(docFreq=638, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.16248512 = weight(abstract_txt:size in 2006) [ClassicSimilarity], result of:
           0.16248512 = score(doc=2006,freq=6.0), product of:
             0.1800492 = queryWeight, product of:
               1.7184398 = boost
               5.8947687 = idf(docFreq=330, maxDocs=44218)
               0.0177742 = queryNorm
             0.9024485 = fieldWeight in 2006, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.8947687 = idf(docFreq=330, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.13013698 = weight(abstract_txt:scaling in 2006) [ClassicSimilarity], result of:
           0.13013698 = score(doc=2006,freq=1.0), product of:
             0.28216276 = queryWeight, product of:
               2.1512387 = boost
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0177742 = queryNorm
             0.46121246 = fieldWeight in 2006, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.23097172 = weight(abstract_txt:density in 2006) [ClassicSimilarity], result of:
           0.23097172 = score(doc=2006,freq=1.0), product of:
             0.47348058 = queryWeight, product of:
               3.4129934 = boost
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0177742 = queryNorm
             0.4878167 = fieldWeight in 2006, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
         0.13443355 = weight(abstract_txt:citation in 2006) [ClassicSimilarity], result of:
           0.13443355 = score(doc=2006,freq=2.0), product of:
             0.31060442 = queryWeight, product of:
               3.5687208 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0177742 = queryNorm
             0.43281272 = fieldWeight in 2006, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0625 = fieldNorm(doc=2006)
       0.32 = coord(8/25)
   

4. Perry, C.A.: Network influences on scholarly communication in developmental dyslexia : a longitudinal follow-up (2003) 0.19

   0.19189058 = sum of:
     0.19189058 = product of:
       0.95945287 = sum of:
         0.075928904 = weight(abstract_txt:groups in 5173) [ClassicSimilarity], result of:
           0.075928904 = score(doc=5173,freq=2.0), product of:
             0.13475782 = queryWeight, product of:
               1.486674 = boost
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0177742 = queryNorm
             0.5634471 = fieldWeight in 5173, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.078125 = fieldNorm(doc=5173)
         0.16267122 = weight(abstract_txt:scaling in 5173) [ClassicSimilarity], result of:
           0.16267122 = score(doc=5173,freq=1.0), product of:
             0.28216276 = queryWeight, product of:
               2.1512387 = boost
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0177742 = queryNorm
             0.57651556 = fieldWeight in 5173, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.078125 = fieldNorm(doc=5173)
         0.28871468 = weight(abstract_txt:density in 5173) [ClassicSimilarity], result of:
           0.28871468 = score(doc=5173,freq=1.0), product of:
             0.47348058 = queryWeight, product of:
               3.4129934 = boost
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0177742 = queryNorm
             0.6097709 = fieldWeight in 5173, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.078125 = fieldNorm(doc=5173)
         0.19449091 = weight(abstract_txt:researchers in 5173) [ClassicSimilarity], result of:
           0.19449091 = score(doc=5173,freq=3.0), product of:
             0.2991105 = queryWeight, product of:
               3.502068 = boost
               4.805261 = idf(docFreq=983, maxDocs=44218)
               0.0177742 = queryNorm
             0.65023094 = fieldWeight in 5173, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.805261 = idf(docFreq=983, maxDocs=44218)
               0.078125 = fieldNorm(doc=5173)
         0.23764719 = weight(abstract_txt:citation in 5173) [ClassicSimilarity], result of:
           0.23764719 = score(doc=5173,freq=4.0), product of:
             0.31060442 = queryWeight, product of:
               3.5687208 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0177742 = queryNorm
             0.76511204 = fieldWeight in 5173, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.078125 = fieldNorm(doc=5173)
       0.2 = coord(5/25)
   

5. Vibert, N.; Ros, C.; Bigot, L. le; Ramond, M.; Gatefin, J.; Rouet, J.-F.: Effects of domain knowledge on reference search with the PubMed database : an experimental study (2009) 0.16

   0.16070464 = sum of:
     0.16070464 = product of:
       0.50220203 = sum of:
         0.05824628 = weight(abstract_txt:biology in 2940) [ClassicSimilarity], result of:
           0.05824628 = score(doc=2940,freq=1.0), product of:
             0.13103923 = queryWeight, product of:
               1.0366316 = boost
               7.11192 = idf(docFreq=97, maxDocs=44218)
               0.0177742 = queryNorm
             0.444495 = fieldWeight in 2940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.11192 = idf(docFreq=97, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.026002828 = weight(abstract_txt:specific in 2940) [ClassicSimilarity], result of:
           0.026002828 = score(doc=2940,freq=1.0), product of:
             0.096437566 = queryWeight, product of:
               1.257656 = boost
               4.314141 = idf(docFreq=1607, maxDocs=44218)
               0.0177742 = queryNorm
             0.2696338 = fieldWeight in 2940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.314141 = idf(docFreq=1607, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.029353194 = weight(abstract_txt:field in 2940) [ClassicSimilarity], result of:
           0.029353194 = score(doc=2940,freq=1.0), product of:
             0.1045529 = queryWeight, product of:
               1.3095039 = boost
               4.491995 = idf(docFreq=1345, maxDocs=44218)
               0.0177742 = queryNorm
             0.28074968 = fieldWeight in 2940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.491995 = idf(docFreq=1345, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.031782806 = weight(abstract_txt:main in 2940) [ClassicSimilarity], result of:
           0.031782806 = score(doc=2940,freq=1.0), product of:
             0.11024545 = queryWeight, product of:
               1.3446804 = boost
               4.612661 = idf(docFreq=1192, maxDocs=44218)
               0.0177742 = queryNorm
             0.2882913 = fieldWeight in 2940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.612661 = idf(docFreq=1192, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.04295188 = weight(abstract_txt:groups in 2940) [ClassicSimilarity], result of:
           0.04295188 = score(doc=2940,freq=1.0), product of:
             0.13475782 = queryWeight, product of:
               1.486674 = boost
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0177742 = queryNorm
             0.31873384 = fieldWeight in 2940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.02795753 = weight(abstract_txt:science in 2940) [ClassicSimilarity], result of:
           0.02795753 = score(doc=2940,freq=1.0), product of:
             0.11585875 = queryWeight, product of:
               1.6882968 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0177742 = queryNorm
             0.24130704 = fieldWeight in 2940, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.10624447 = weight(abstract_txt:individual in 2940) [ClassicSimilarity], result of:
           0.10624447 = score(doc=2940,freq=2.0), product of:
             0.24647342 = queryWeight, product of:
               2.8434055 = boost
               4.8768706 = idf(docFreq=915, maxDocs=44218)
               0.0177742 = queryNorm
             0.43105853 = fieldWeight in 2940, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.8768706 = idf(docFreq=915, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
         0.179663 = weight(abstract_txt:researchers in 2940) [ClassicSimilarity], result of:
           0.179663 = score(doc=2940,freq=4.0), product of:
             0.2991105 = queryWeight, product of:
               3.502068 = boost
               4.805261 = idf(docFreq=983, maxDocs=44218)
               0.0177742 = queryNorm
             0.60065764 = fieldWeight in 2940, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.805261 = idf(docFreq=983, maxDocs=44218)
               0.0625 = fieldNorm(doc=2940)
       0.32 = coord(8/25)