Document (#38432)

Author

Bornmann, L.
Mutz, R.

Title

From P100 to P100' : a new citation-rank approach

Source

Journal of the Association for Information Science and Technology. 65(2014) no.9, S.1939-1943

Year

2014

Series

Brief communication

Abstract

Properties of a percentile-based rating scale needed in bibliometrics are formulated. Based on these properties, P100 was recently introduced as a new citation-rank approach (Bornmann, Leydesdorff, & Wang, 2013). In this paper, we conceptualize P100 and propose an improvement which we call P100'. Advantages and disadvantages of citation-rank indicators are noted.

Theme

Informetrie
Retrievalalgorithmen

Similar documents (author)

1. Bornmann, L.; Mutz, R.: Growth rates of modern science : a bibliometric analysis based on the number of publications and cited references (2015) 5.97

   5.9697146 = sum of:
     5.9697146 = sum of:
       2.092307 = weight(author_txt:bornmann in 3261) [ClassicSimilarity], result of:
         2.092307 = score(doc=3261,freq=1.0), product of:
           0.55247295 = queryWeight, product of:
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.07294014 = queryNorm
           3.7871666 = fieldWeight in 3261, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.5 = fieldNorm(doc=3261)
       3.8774076 = weight(author_txt:mutz in 3261) [ClassicSimilarity], result of:
         3.8774076 = score(doc=3261,freq=1.0), product of:
           0.8335309 = queryWeight, product of:
             1.2283025 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07294014 = queryNorm
           4.6517863 = fieldWeight in 3261, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.5 = fieldNorm(doc=3261)
   

2. Bornmann, L.; Mutz, R.; Daniel, H.-D.: Are there better indices for evaluation purposes than the h index? : a comparison of nine different variants of the h index using data from biomedicine (2008) 4.48

   4.477286 = sum of:
     4.477286 = sum of:
       1.5692303 = weight(author_txt:bornmann in 2608) [ClassicSimilarity], result of:
         1.5692303 = score(doc=2608,freq=1.0), product of:
           0.55247295 = queryWeight, product of:
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.07294014 = queryNorm
           2.840375 = fieldWeight in 2608, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.375 = fieldNorm(doc=2608)
       2.9080555 = weight(author_txt:mutz in 2608) [ClassicSimilarity], result of:
         2.9080555 = score(doc=2608,freq=1.0), product of:
           0.8335309 = queryWeight, product of:
             1.2283025 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07294014 = queryNorm
           3.4888396 = fieldWeight in 2608, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.375 = fieldNorm(doc=2608)
   

3. Bornmann, L.; Mutz, R.; Daniel, H.D.: Do we need the h index and its variants in addition to standard bibliometric measures? (2009) 4.48

   4.477286 = sum of:
     4.477286 = sum of:
       1.5692303 = weight(author_txt:bornmann in 3861) [ClassicSimilarity], result of:
         1.5692303 = score(doc=3861,freq=1.0), product of:
           0.55247295 = queryWeight, product of:
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.07294014 = queryNorm
           2.840375 = fieldWeight in 3861, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.375 = fieldNorm(doc=3861)
       2.9080555 = weight(author_txt:mutz in 3861) [ClassicSimilarity], result of:
         2.9080555 = score(doc=3861,freq=1.0), product of:
           0.8335309 = queryWeight, product of:
             1.2283025 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07294014 = queryNorm
           3.4888396 = fieldWeight in 3861, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.375 = fieldNorm(doc=3861)
   

4. Bornmann, L.; Mutz, R.; Daniel, H.-D.: Multilevel-statistical reformulation of citation-based university rankings : the Leiden ranking 2011/2012 (2013) 4.48

   4.477286 = sum of:
     4.477286 = sum of:
       1.5692303 = weight(author_txt:bornmann in 2007) [ClassicSimilarity], result of:
         1.5692303 = score(doc=2007,freq=1.0), product of:
           0.55247295 = queryWeight, product of:
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.07294014 = queryNorm
           2.840375 = fieldWeight in 2007, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.375 = fieldNorm(doc=2007)
       2.9080555 = weight(author_txt:mutz in 2007) [ClassicSimilarity], result of:
         2.9080555 = score(doc=2007,freq=1.0), product of:
           0.8335309 = queryWeight, product of:
             1.2283025 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07294014 = queryNorm
           3.4888396 = fieldWeight in 2007, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.375 = fieldNorm(doc=2007)
   

5. Mutz, R.; Bornmann, L.; Daniel, H.-D.: Testing for the fairness and predictive validity of research funding decisions : a multilevel multiple imputation for missing data approach using ex-ante and ex-post peer evaluation data from the Austrian science fund (2015) 4.48

   4.477286 = sum of:
     4.477286 = sum of:
       1.5692303 = weight(author_txt:bornmann in 3270) [ClassicSimilarity], result of:
         1.5692303 = score(doc=3270,freq=1.0), product of:
           0.55247295 = queryWeight, product of:
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.07294014 = queryNorm
           2.840375 = fieldWeight in 3270, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.574333 = idf(docFreq=61, maxDocs=44421)
             0.375 = fieldNorm(doc=3270)
       2.9080555 = weight(author_txt:mutz in 3270) [ClassicSimilarity], result of:
         2.9080555 = score(doc=3270,freq=1.0), product of:
           0.8335309 = queryWeight, product of:
             1.2283025 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07294014 = queryNorm
           3.4888396 = fieldWeight in 3270, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.375 = fieldNorm(doc=3270)
   

Similar documents (content)

1. Rousseau, R.: Basic properties of both percentile rank scores and the I3 indicator (2012) 0.33

   0.33135018 = sum of:
     0.33135018 = product of:
       1.1833935 = sum of:
         0.011400912 = weight(abstract_txt:these in 993) [ClassicSimilarity], result of:
           0.011400912 = score(doc=993,freq=1.0), product of:
             0.038207505 = queryWeight, product of:
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.012004085 = queryNorm
             0.29839456 = fieldWeight in 993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
         0.093212835 = weight(abstract_txt:introduced in 993) [ClassicSimilarity], result of:
           0.093212835 = score(doc=993,freq=2.0), product of:
             0.123073 = queryWeight, product of:
               1.7947627 = boost
               5.7125063 = idf(docFreq=398, maxDocs=44421)
               0.012004085 = queryNorm
             0.75737846 = fieldWeight in 993, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.7125063 = idf(docFreq=398, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
         0.068271466 = weight(abstract_txt:recently in 993) [ClassicSimilarity], result of:
           0.068271466 = score(doc=993,freq=1.0), product of:
             0.12599358 = queryWeight, product of:
               1.8159332 = boost
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.012004085 = queryNorm
             0.54186463 = fieldWeight in 993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
         0.07745182 = weight(abstract_txt:indicators in 993) [ClassicSimilarity], result of:
           0.07745182 = score(doc=993,freq=1.0), product of:
             0.13704926 = queryWeight, product of:
               1.8939303 = boost
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.012004085 = queryNorm
             0.5651385 = fieldWeight in 993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
         0.23743843 = weight(abstract_txt:percentile in 993) [ClassicSimilarity], result of:
           0.23743843 = score(doc=993,freq=1.0), product of:
             0.28921643 = queryWeight, product of:
               2.7512949 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.012004085 = queryNorm
             0.8209714 = fieldWeight in 993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
         0.4151685 = weight(abstract_txt:leydesdorff in 993) [ClassicSimilarity], result of:
           0.4151685 = score(doc=993,freq=2.0), product of:
             0.33316693 = queryWeight, product of:
               2.9529533 = boost
               9.398883 = idf(docFreq=9, maxDocs=44421)
               0.012004085 = queryNorm
             1.2461276 = fieldWeight in 993, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.398883 = idf(docFreq=9, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
         0.28044948 = weight(abstract_txt:rank in 993) [ClassicSimilarity], result of:
           0.28044948 = score(doc=993,freq=1.0), product of:
             0.4660857 = queryWeight, product of:
               6.0494957 = boost
               6.418264 = idf(docFreq=196, maxDocs=44421)
               0.012004085 = queryNorm
             0.6017122 = fieldWeight in 993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.418264 = idf(docFreq=196, maxDocs=44421)
               0.09375 = fieldNorm(doc=993)
       0.28 = coord(7/25)
   

2. Prathap, G.: ¬A three-class, three-dimensional bibliometric performance indicator (2014) 0.25

   0.24622767 = sum of:
     0.24622767 = product of:
       1.0259486 = sum of:
         0.10985238 = weight(abstract_txt:introduced in 2308) [ClassicSimilarity], result of:
           0.10985238 = score(doc=2308,freq=1.0), product of:
             0.123073 = queryWeight, product of:
               1.7947627 = boost
               5.7125063 = idf(docFreq=398, maxDocs=44421)
               0.012004085 = queryNorm
             0.8925791 = fieldWeight in 2308, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7125063 = idf(docFreq=398, maxDocs=44421)
               0.15625 = fieldNorm(doc=2308)
         0.113785766 = weight(abstract_txt:recently in 2308) [ClassicSimilarity], result of:
           0.113785766 = score(doc=2308,freq=1.0), product of:
             0.12599358 = queryWeight, product of:
               1.8159332 = boost
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.012004085 = queryNorm
             0.90310764 = fieldWeight in 2308, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.15625 = fieldNorm(doc=2308)
         0.038010202 = weight(abstract_txt:based in 2308) [ClassicSimilarity], result of:
           0.038010202 = score(doc=2308,freq=1.0), product of:
             0.07642461 = queryWeight, product of:
               2.0001256 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.012004085 = queryNorm
             0.4973555 = fieldWeight in 2308, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.15625 = fieldNorm(doc=2308)
         0.21330705 = weight(abstract_txt:2013 in 2308) [ClassicSimilarity], result of:
           0.21330705 = score(doc=2308,freq=1.0), product of:
             0.1915549 = queryWeight, product of:
               2.2390938 = boost
               7.1267567 = idf(docFreq=96, maxDocs=44421)
               0.012004085 = queryNorm
             1.1135557 = fieldWeight in 2308, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1267567 = idf(docFreq=96, maxDocs=44421)
               0.15625 = fieldNorm(doc=2308)
         0.061712433 = weight(abstract_txt:approach in 2308) [ClassicSimilarity], result of:
           0.061712433 = score(doc=2308,freq=1.0), product of:
             0.10557187 = queryWeight, product of:
               2.350795 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.012004085 = queryNorm
             0.5845537 = fieldWeight in 2308, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.15625 = fieldNorm(doc=2308)
         0.4892808 = weight(abstract_txt:leydesdorff in 2308) [ClassicSimilarity], result of:
           0.4892808 = score(doc=2308,freq=1.0), product of:
             0.33316693 = queryWeight, product of:
               2.9529533 = boost
               9.398883 = idf(docFreq=9, maxDocs=44421)
               0.012004085 = queryNorm
             1.4685755 = fieldWeight in 2308, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.398883 = idf(docFreq=9, maxDocs=44421)
               0.15625 = fieldNorm(doc=2308)
       0.24 = coord(6/25)
   

3. Waltman, L.; Schreiber, M.: On the calculation of percentile-based bibliometric indicators (2013) 0.21

   0.20755225 = sum of:
     0.20755225 = product of:
       0.8648011 = sum of:
         0.056892883 = weight(abstract_txt:recently in 1616) [ClassicSimilarity], result of:
           0.056892883 = score(doc=1616,freq=1.0), product of:
             0.12599358 = queryWeight, product of:
               1.8159332 = boost
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.012004085 = queryNorm
             0.45155382 = fieldWeight in 1616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.078125 = fieldNorm(doc=1616)
         0.12908636 = weight(abstract_txt:indicators in 1616) [ClassicSimilarity], result of:
           0.12908636 = score(doc=1616,freq=4.0), product of:
             0.13704926 = queryWeight, product of:
               1.8939303 = boost
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.012004085 = queryNorm
             0.9418976 = fieldWeight in 1616, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.078125 = fieldNorm(doc=1616)
         0.0465528 = weight(abstract_txt:based in 1616) [ClassicSimilarity], result of:
           0.0465528 = score(doc=1616,freq=6.0), product of:
             0.07642461 = queryWeight, product of:
               2.0001256 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.012004085 = queryNorm
             0.6091336 = fieldWeight in 1616, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.078125 = fieldNorm(doc=1616)
         0.043637276 = weight(abstract_txt:approach in 1616) [ClassicSimilarity], result of:
           0.043637276 = score(doc=1616,freq=2.0), product of:
             0.10557187 = queryWeight, product of:
               2.350795 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.012004085 = queryNorm
             0.41334188 = fieldWeight in 1616, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.078125 = fieldNorm(doc=1616)
         0.44244042 = weight(abstract_txt:percentile in 1616) [ClassicSimilarity], result of:
           0.44244042 = score(doc=1616,freq=5.0), product of:
             0.28921643 = queryWeight, product of:
               2.7512949 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.012004085 = queryNorm
             1.52979 = fieldWeight in 1616, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.078125 = fieldNorm(doc=1616)
         0.14619136 = weight(abstract_txt:citation in 1616) [ClassicSimilarity], result of:
           0.14619136 = score(doc=1616,freq=2.0), product of:
             0.27057523 = queryWeight, product of:
               4.6092505 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012004085 = queryNorm
             0.5402984 = fieldWeight in 1616, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.078125 = fieldNorm(doc=1616)
       0.24 = coord(6/25)
   

4. Schreiber, M.: Inconsistencies of recently proposed citation impact indicators and how to avoid them (2012) 0.20

   0.20186296 = sum of:
     0.20186296 = product of:
       0.8410957 = sum of:
         0.007600608 = weight(abstract_txt:these in 1459) [ClassicSimilarity], result of:
           0.007600608 = score(doc=1459,freq=1.0), product of:
             0.038207505 = queryWeight, product of:
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.012004085 = queryNorm
             0.19892971 = fieldWeight in 1459, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1828754 = idf(docFreq=5006, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.045514308 = weight(abstract_txt:recently in 1459) [ClassicSimilarity], result of:
           0.045514308 = score(doc=1459,freq=1.0), product of:
             0.12599358 = queryWeight, product of:
               1.8159332 = boost
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.012004085 = queryNorm
             0.36124307 = fieldWeight in 1459, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.779889 = idf(docFreq=372, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.073022276 = weight(abstract_txt:indicators in 1459) [ClassicSimilarity], result of:
           0.073022276 = score(doc=1459,freq=2.0), product of:
             0.13704926 = queryWeight, product of:
               1.8939303 = boost
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.012004085 = queryNorm
             0.5328177 = fieldWeight in 1459, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.27417028 = weight(abstract_txt:percentile in 1459) [ClassicSimilarity], result of:
           0.27417028 = score(doc=1459,freq=3.0), product of:
             0.28921643 = queryWeight, product of:
               2.7512949 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.012004085 = queryNorm
             0.9479761 = fieldWeight in 1459, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.11695309 = weight(abstract_txt:citation in 1459) [ClassicSimilarity], result of:
           0.11695309 = score(doc=1459,freq=2.0), product of:
             0.27057523 = queryWeight, product of:
               4.6092505 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012004085 = queryNorm
             0.43223873 = fieldWeight in 1459, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.32383516 = weight(abstract_txt:rank in 1459) [ClassicSimilarity], result of:
           0.32383516 = score(doc=1459,freq=3.0), product of:
             0.4660857 = queryWeight, product of:
               6.0494957 = boost
               6.418264 = idf(docFreq=196, maxDocs=44421)
               0.012004085 = queryNorm
             0.69479746 = fieldWeight in 1459, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.418264 = idf(docFreq=196, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
       0.24 = coord(6/25)
   

5. Leydesdorff, L.; Bornmann, L.; Mutz, R.; Opthof, T.: Turning the tables on citation analysis one more time : principles for comparing sets of documents (2011) 0.19

   0.19488114 = sum of:
     0.19488114 = product of:
       0.6960041 = sum of:
         0.009777414 = weight(abstract_txt:paper in 485) [ClassicSimilarity], result of:
           0.009777414 = score(doc=485,freq=1.0), product of:
             0.04519244 = queryWeight, product of:
               1.0875733 = boost
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.012004085 = queryNorm
             0.21635064 = fieldWeight in 485, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
         0.103269085 = weight(abstract_txt:indicators in 485) [ClassicSimilarity], result of:
           0.103269085 = score(doc=485,freq=4.0), product of:
             0.13704926 = queryWeight, product of:
               1.8939303 = boost
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.012004085 = queryNorm
             0.75351804 = fieldWeight in 485, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.0281444 = idf(docFreq=290, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
         0.05478967 = weight(abstract_txt:improvement in 485) [ClassicSimilarity], result of:
           0.05478967 = score(doc=485,freq=1.0), product of:
             0.14257681 = queryWeight, product of:
               1.9317464 = boost
               6.148508 = idf(docFreq=257, maxDocs=44421)
               0.012004085 = queryNorm
             0.38428175 = fieldWeight in 485, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.148508 = idf(docFreq=257, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
         0.021501815 = weight(abstract_txt:based in 485) [ClassicSimilarity], result of:
           0.021501815 = score(doc=485,freq=2.0), product of:
             0.07642461 = queryWeight, product of:
               2.0001256 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.012004085 = queryNorm
             0.28134674 = fieldWeight in 485, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
         0.024684973 = weight(abstract_txt:approach in 485) [ClassicSimilarity], result of:
           0.024684973 = score(doc=485,freq=1.0), product of:
             0.10557187 = queryWeight, product of:
               2.350795 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.012004085 = queryNorm
             0.2338215 = fieldWeight in 485, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
         0.31658456 = weight(abstract_txt:percentile in 485) [ClassicSimilarity], result of:
           0.31658456 = score(doc=485,freq=4.0), product of:
             0.28921643 = queryWeight, product of:
               2.7512949 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.012004085 = queryNorm
             1.0946286 = fieldWeight in 485, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
         0.16539665 = weight(abstract_txt:citation in 485) [ClassicSimilarity], result of:
           0.16539665 = score(doc=485,freq=4.0), product of:
             0.27057523 = queryWeight, product of:
               4.6092505 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012004085 = queryNorm
             0.6112779 = fieldWeight in 485, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=485)
       0.28 = coord(7/25)