Document (#36964)

Author

Waltman, L.
Eck, N.J. van
Raan, A.F.J. van

Title

Universality of citation distributions revisited

Source

Journal of the American Society for Information Science and Technology. 63(2012) no.1, S.72-77

Year

2012

Abstract

Radicchi, Fortunato, and Castellano (2008) claim that, apart from a scaling factor, all fields of science are characterized by the same citation distribution. We present a large-scale validation study of this universality-of-citation-distributions claim. Our analysis shows that claiming citation distributions to be universal for all fields of science is not warranted. Although many fields indeed seem to have fairly similar citation distributions, there are exceptions as well. We also briefly discuss the consequences of our findings for the measurement of scientific impact using citation-based bibliometric indicators.

Theme

Informetrie

Similar documents (author)

1. Raan, A.F.J. van: Scientometrics : state of the art (1997) 3.46

   3.4614246 = sum of:
     3.4614246 = product of:
       5.192137 = sum of:
         2.5382433 = weight(author_txt:raan in 409) [ClassicSimilarity], result of:
           2.5382433 = score(doc=409,freq=1.0), product of:
             0.5688387 = queryWeight, product of:
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06374044 = 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)
         2.6538932 = weight(author_txt:a.f.j in 409) [ClassicSimilarity], result of:
           2.6538932 = score(doc=409,freq=1.0), product of:
             0.58598876 = queryWeight, product of:
               1.0149627 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.06374044 = 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)
       0.6666667 = coord(2/3)
   

2. Raan, A.F.J. van: ¬The influence of international collaboration on the impact of research results (1998) 3.46

   3.4614246 = sum of:
     3.4614246 = product of:
       5.192137 = sum of:
         2.5382433 = weight(author_txt:raan in 5120) [ClassicSimilarity], result of:
           2.5382433 = score(doc=5120,freq=1.0), product of:
             0.5688387 = queryWeight, product of:
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06374044 = 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)
         2.6538932 = weight(author_txt:a.f.j in 5120) [ClassicSimilarity], result of:
           2.6538932 = score(doc=5120,freq=1.0), product of:
             0.58598876 = queryWeight, product of:
               1.0149627 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.06374044 = 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)
       0.6666667 = coord(2/3)
   

3. Raan, A.F.J. van: Statistical properties of bibliometric indicators : research group indicator distributions and correlations (2006) 3.46

   3.4614246 = sum of:
     3.4614246 = product of:
       5.192137 = sum of:
         2.5382433 = weight(author_txt:raan in 5275) [ClassicSimilarity], result of:
           2.5382433 = score(doc=5275,freq=1.0), product of:
             0.5688387 = queryWeight, product of:
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06374044 = queryNorm
             4.462149 = fieldWeight in 5275, 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=5275)
         2.6538932 = weight(author_txt:a.f.j in 5275) [ClassicSimilarity], result of:
           2.6538932 = score(doc=5275,freq=1.0), product of:
             0.58598876 = queryWeight, product of:
               1.0149627 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.06374044 = queryNorm
             4.528915 = fieldWeight in 5275, 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=5275)
       0.6666667 = coord(2/3)
   

4. Raan, A.F.J. van: Performance-related differences of bibliometric statistical properties of research groups : cumulative advantages and hierarchically layered networks (2006) 3.46

   3.4614246 = sum of:
     3.4614246 = product of:
       5.192137 = sum of:
         2.5382433 = weight(author_txt:raan in 220) [ClassicSimilarity], result of:
           2.5382433 = score(doc=220,freq=1.0), product of:
             0.5688387 = queryWeight, product of:
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06374044 = queryNorm
             4.462149 = fieldWeight in 220, 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=220)
         2.6538932 = weight(author_txt:a.f.j in 220) [ClassicSimilarity], result of:
           2.6538932 = score(doc=220,freq=1.0), product of:
             0.58598876 = queryWeight, product of:
               1.0149627 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.06374044 = queryNorm
             4.528915 = fieldWeight in 220, 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=220)
       0.6666667 = coord(2/3)
   

5. Raan, A.F.J. van: Bibliometric statistical properties of the 100 largest European research universities : prevalent scaling rules in the science system (2008) 3.46

   3.4614246 = sum of:
     3.4614246 = product of:
       5.192137 = sum of:
         2.5382433 = weight(author_txt:raan in 1372) [ClassicSimilarity], result of:
           2.5382433 = score(doc=1372,freq=1.0), product of:
             0.5688387 = queryWeight, product of:
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06374044 = queryNorm
             4.462149 = fieldWeight in 1372, 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=1372)
         2.6538932 = weight(author_txt:a.f.j in 1372) [ClassicSimilarity], result of:
           2.6538932 = score(doc=1372,freq=1.0), product of:
             0.58598876 = queryWeight, product of:
               1.0149627 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.06374044 = queryNorm
             4.528915 = fieldWeight in 1372, 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=1372)
       0.6666667 = coord(2/3)
   

Similar documents (content)

1. Perianes-Rodriguez, A.; Ruiz-Castillo, J.: University citation distributions (2016) 0.44

   0.4411395 = sum of:
     0.4411395 = product of:
       1.3785609 = sum of:
         0.03223034 = weight(abstract_txt:factor in 3152) [ClassicSimilarity], result of:
           0.03223034 = score(doc=3152,freq=1.0), product of:
             0.088873215 = queryWeight, product of:
               5.8024845 = idf(docFreq=362, maxDocs=44218)
               0.015316407 = queryNorm
             0.36265528 = fieldWeight in 3152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8024845 = idf(docFreq=362, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.045861125 = weight(abstract_txt:2008 in 3152) [ClassicSimilarity], result of:
           0.045861125 = score(doc=3152,freq=1.0), product of:
             0.11243221 = queryWeight, product of:
               1.1247602 = boost
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.015316407 = queryNorm
             0.4079002 = fieldWeight in 3152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.046596214 = weight(abstract_txt:consequences in 3152) [ClassicSimilarity], result of:
           0.046596214 = score(doc=3152,freq=1.0), product of:
             0.11363045 = queryWeight, product of:
               1.1307378 = boost
               6.5610886 = idf(docFreq=169, maxDocs=44218)
               0.015316407 = queryNorm
             0.41006804 = fieldWeight in 3152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5610886 = idf(docFreq=169, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.026855782 = weight(abstract_txt:science in 3152) [ClassicSimilarity], result of:
           0.026855782 = score(doc=3152,freq=2.0), product of:
             0.07869603 = queryWeight, product of:
               1.3307791 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015316407 = queryNorm
             0.3412597 = fieldWeight in 3152, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.1121291 = weight(abstract_txt:claim in 3152) [ClassicSimilarity], result of:
           0.1121291 = score(doc=3152,freq=1.0), product of:
             0.2570888 = queryWeight, product of:
               2.4053104 = boost
               6.9783883 = idf(docFreq=111, maxDocs=44218)
               0.015316407 = queryNorm
             0.43614927 = fieldWeight in 3152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9783883 = idf(docFreq=111, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.19310851 = weight(abstract_txt:universality in 3152) [ClassicSimilarity], result of:
           0.19310851 = score(doc=3152,freq=1.0), product of:
             0.36937875 = queryWeight, product of:
               2.8831384 = boost
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.015316407 = queryNorm
             0.5227927 = fieldWeight in 3152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.5542528 = weight(abstract_txt:distributions in 3152) [ClassicSimilarity], result of:
           0.5542528 = score(doc=3152,freq=7.0), product of:
             0.4913454 = queryWeight, product of:
               4.7025995 = boost
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.015316407 = queryNorm
             1.1280309 = fieldWeight in 3152, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
         0.36752698 = weight(abstract_txt:citation in 3152) [ClassicSimilarity], result of:
           0.36752698 = score(doc=3152,freq=10.0), product of:
             0.3797556 = queryWeight, product of:
               5.0634003 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015316407 = queryNorm
             0.9677987 = fieldWeight in 3152, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0625 = fieldNorm(doc=3152)
       0.32 = coord(8/25)
   

2. 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) 0.20

   0.19847247 = sum of:
     0.19847247 = product of:
       0.82696867 = sum of:
         0.036118343 = weight(abstract_txt:indicators in 4186) [ClassicSimilarity], result of:
           0.036118343 = score(doc=4186,freq=1.0), product of:
             0.095884 = queryWeight, product of:
               1.038694 = boost
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.015316407 = queryNorm
             0.37668788 = fieldWeight in 4186, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.045861125 = weight(abstract_txt:2008 in 4186) [ClassicSimilarity], result of:
           0.045861125 = score(doc=4186,freq=1.0), product of:
             0.11243221 = queryWeight, product of:
               1.1247602 = boost
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.015316407 = queryNorm
             0.4079002 = fieldWeight in 4186, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.03797981 = weight(abstract_txt:science in 4186) [ClassicSimilarity], result of:
           0.03797981 = score(doc=4186,freq=4.0), product of:
             0.07869603 = queryWeight, product of:
               1.3307791 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015316407 = queryNorm
             0.48261407 = fieldWeight in 4186, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.12606362 = weight(abstract_txt:fields in 4186) [ClassicSimilarity], result of:
           0.12606362 = score(doc=4186,freq=4.0), product of:
             0.20045084 = queryWeight, product of:
               2.6012323 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015316407 = queryNorm
             0.6289004 = fieldWeight in 4186, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.2962606 = weight(abstract_txt:distributions in 4186) [ClassicSimilarity], result of:
           0.2962606 = score(doc=4186,freq=2.0), product of:
             0.4913454 = queryWeight, product of:
               4.7025995 = boost
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.015316407 = queryNorm
             0.6029579 = fieldWeight in 4186, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.28468516 = weight(abstract_txt:citation in 4186) [ClassicSimilarity], result of:
           0.28468516 = score(doc=4186,freq=6.0), product of:
             0.3797556 = queryWeight, product of:
               5.0634003 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015316407 = queryNorm
             0.7496537 = fieldWeight in 4186, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
       0.24 = coord(6/25)
   

3. Bornmann, L.; Daniel, H.-D.: Universality of citation distributions : a validation of Radicchi et al.'s relative indicator cf = c/c0 at the micro level using data from chemistry (2009) 0.19

   0.19258706 = sum of:
     0.19258706 = product of:
       0.9629353 = sum of:
         0.045861125 = weight(abstract_txt:2008 in 2954) [ClassicSimilarity], result of:
           0.045861125 = score(doc=2954,freq=1.0), product of:
             0.11243221 = queryWeight, product of:
               1.1247602 = boost
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.015316407 = queryNorm
             0.4079002 = fieldWeight in 2954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.0625 = fieldNorm(doc=2954)
         0.06303181 = weight(abstract_txt:fields in 2954) [ClassicSimilarity], result of:
           0.06303181 = score(doc=2954,freq=1.0), product of:
             0.20045084 = queryWeight, product of:
               2.6012323 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015316407 = queryNorm
             0.3144502 = fieldWeight in 2954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.0625 = fieldNorm(doc=2954)
         0.27309665 = weight(abstract_txt:universality in 2954) [ClassicSimilarity], result of:
           0.27309665 = score(doc=2954,freq=2.0), product of:
             0.36937875 = queryWeight, product of:
               2.8831384 = boost
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.015316407 = queryNorm
             0.7393405 = fieldWeight in 2954, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.0625 = fieldNorm(doc=2954)
         0.2962606 = weight(abstract_txt:distributions in 2954) [ClassicSimilarity], result of:
           0.2962606 = score(doc=2954,freq=2.0), product of:
             0.4913454 = queryWeight, product of:
               4.7025995 = boost
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.015316407 = queryNorm
             0.6029579 = fieldWeight in 2954, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.0625 = fieldNorm(doc=2954)
         0.28468516 = weight(abstract_txt:citation in 2954) [ClassicSimilarity], result of:
           0.28468516 = score(doc=2954,freq=6.0), product of:
             0.3797556 = queryWeight, product of:
               5.0634003 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015316407 = queryNorm
             0.7496537 = fieldWeight in 2954, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0625 = fieldNorm(doc=2954)
       0.2 = coord(5/25)
   

4. Costas, R.; Perianes-Rodríguez, A.; Ruiz-Castillo, J.: On the quest for currencies of science : field "exchange rates" for citations and Mendeley readership (2017) 0.17

   0.17205863 = sum of:
     0.17205863 = product of:
       0.71691096 = sum of:
         0.03160355 = weight(abstract_txt:indicators in 4051) [ClassicSimilarity], result of:
           0.03160355 = score(doc=4051,freq=1.0), product of:
             0.095884 = queryWeight, product of:
               1.038694 = boost
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.015316407 = queryNorm
             0.32960188 = fieldWeight in 4051, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4051)
         0.047964133 = weight(abstract_txt:measurement in 4051) [ClassicSimilarity], result of:
           0.047964133 = score(doc=4051,freq=1.0), product of:
             0.12662904 = queryWeight, product of:
               1.1936616 = boost
               6.926203 = idf(docFreq=117, maxDocs=44218)
               0.015316407 = queryNorm
             0.37877673 = fieldWeight in 4051, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.926203 = idf(docFreq=117, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4051)
         0.016616168 = weight(abstract_txt:science in 4051) [ClassicSimilarity], result of:
           0.016616168 = score(doc=4051,freq=1.0), product of:
             0.07869603 = queryWeight, product of:
               1.3307791 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015316407 = queryNorm
             0.21114366 = fieldWeight in 4051, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4051)
         0.11030566 = weight(abstract_txt:fields in 4051) [ClassicSimilarity], result of:
           0.11030566 = score(doc=4051,freq=4.0), product of:
             0.20045084 = queryWeight, product of:
               2.6012323 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015316407 = queryNorm
             0.55028784 = fieldWeight in 4051, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4051)
         0.3666038 = weight(abstract_txt:distributions in 4051) [ClassicSimilarity], result of:
           0.3666038 = score(doc=4051,freq=4.0), product of:
             0.4913454 = queryWeight, product of:
               4.7025995 = boost
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.015316407 = queryNorm
             0.74612236 = fieldWeight in 4051, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4051)
         0.14381766 = weight(abstract_txt:citation in 4051) [ClassicSimilarity], result of:
           0.14381766 = score(doc=4051,freq=2.0), product of:
             0.3797556 = queryWeight, product of:
               5.0634003 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015316407 = queryNorm
             0.37871113 = fieldWeight in 4051, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4051)
       0.24 = coord(6/25)
   

5. Waltman, L.; Schreiber, M.: On the calculation of percentile-based bibliometric indicators (2013) 0.17

   0.17006609 = sum of:
     0.17006609 = product of:
       0.7086087 = sum of:
         0.09029586 = weight(abstract_txt:indicators in 616) [ClassicSimilarity], result of:
           0.09029586 = score(doc=616,freq=4.0), product of:
             0.095884 = queryWeight, product of:
               1.038694 = boost
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.015316407 = queryNorm
             0.9417197 = fieldWeight in 616, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.027006 = idf(docFreq=289, maxDocs=44218)
               0.078125 = fieldNorm(doc=616)
         0.04847204 = weight(abstract_txt:bibliometric in 616) [ClassicSimilarity], result of:
           0.04847204 = score(doc=616,freq=1.0), product of:
             0.100534506 = queryWeight, product of:
               1.0635848 = boost
               6.1714344 = idf(docFreq=250, maxDocs=44218)
               0.015316407 = queryNorm
             0.4821433 = fieldWeight in 616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.1714344 = idf(docFreq=250, maxDocs=44218)
               0.078125 = fieldNorm(doc=616)
         0.023737382 = weight(abstract_txt:science in 616) [ClassicSimilarity], result of:
           0.023737382 = score(doc=616,freq=1.0), product of:
             0.07869603 = queryWeight, product of:
               1.3307791 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015316407 = queryNorm
             0.3016338 = fieldWeight in 616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.078125 = fieldNorm(doc=616)
         0.07878976 = weight(abstract_txt:fields in 616) [ClassicSimilarity], result of:
           0.07878976 = score(doc=616,freq=1.0), product of:
             0.20045084 = queryWeight, product of:
               2.6012323 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015316407 = queryNorm
             0.39306277 = fieldWeight in 616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.078125 = fieldNorm(doc=616)
         0.26185986 = weight(abstract_txt:distributions in 616) [ClassicSimilarity], result of:
           0.26185986 = score(doc=616,freq=1.0), product of:
             0.4913454 = queryWeight, product of:
               4.7025995 = boost
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.015316407 = queryNorm
             0.53294456 = fieldWeight in 616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.82169 = idf(docFreq=130, maxDocs=44218)
               0.078125 = fieldNorm(doc=616)
         0.20545381 = weight(abstract_txt:citation in 616) [ClassicSimilarity], result of:
           0.20545381 = score(doc=616,freq=2.0), product of:
             0.3797556 = queryWeight, product of:
               5.0634003 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015316407 = queryNorm
             0.5410159 = fieldWeight in 616, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.078125 = fieldNorm(doc=616)
       0.24 = coord(6/25)