Document (#36467)

Author

Leydesdorff, L.
Shin, J.C.

Title

How to evaluate universities in terms of their relative citation impacts : fractional counting of citations and the normalization of differences among disciplines

Source

Journal of the American Society for Information Science and Technology. 62(2011) no.6, S.1146-1155

Year

2011

Abstract

Fractional counting of citations can improve on ranking of multidisciplinary research units (such as universities) by normalizing the differences among fields of science in terms of differences in citation behavior. Furthermore, normalization in terms of citing papers abolishes the unsolved questions in scientometrics about the delineation of fields of science in terms of journals and normalization when comparing among different (sets of) journals. Using publication and citation data of seven Korean research universities, we demonstrate the advantages and the differences in the rankings, explain the possible statistics, and suggest ways to visualize the differences in (citing) audiences in terms of a network.

Theme

Informetrie

Similar documents (author)

1. Shin, H.-s.: Quality of Korean cataloging records in shared databases (2003) 2.14

   2.1376302 = sum of:
     2.1376302 = product of:
       4.2752604 = sum of:
         4.2752604 = weight(author_txt:shin in 5498) [ClassicSimilarity], result of:
           4.2752604 = score(doc=5498,freq=1.0), product of:
             0.87688863 = queryWeight, product of:
               1.3506349 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.066582225 = queryNorm
             4.8754888 = fieldWeight in 5498, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.5 = fieldNorm(doc=5498)
       0.5 = coord(1/2)
   

2. Shin, D.-H.: Next generation of information infrastructure : a comparative case study of Korea versus the United States of America (2008) 2.14

   2.1376302 = sum of:
     2.1376302 = product of:
       4.2752604 = sum of:
         4.2752604 = weight(author_txt:shin in 2365) [ClassicSimilarity], result of:
           4.2752604 = score(doc=2365,freq=1.0), product of:
             0.87688863 = queryWeight, product of:
               1.3506349 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.066582225 = queryNorm
             4.8754888 = fieldWeight in 2365, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.5 = fieldNorm(doc=2365)
       0.5 = coord(1/2)
   

3. Kim, J.-M.; Shin, H.; Kim, H.-J.: Schema and constraints-based matching and merging of Topic Maps (2007) 1.34

   1.3360189 = sum of:
     1.3360189 = product of:
       2.6720378 = sum of:
         2.6720378 = weight(author_txt:shin in 922) [ClassicSimilarity], result of:
           2.6720378 = score(doc=922,freq=1.0), product of:
             0.87688863 = queryWeight, product of:
               1.3506349 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.066582225 = queryNorm
             3.0471804 = fieldWeight in 922, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.3125 = fieldNorm(doc=922)
       0.5 = coord(1/2)
   

4. Leydesdorff, L.: ¬The generation of aggregated journal-journal citation maps on the basis of the CD-ROM version of the Science Citation Index (1994) 1.08

   1.0844977 = sum of:
     1.0844977 = product of:
       2.1689954 = sum of:
         2.1689954 = weight(author_txt:leydesdorff in 8281) [ClassicSimilarity], result of:
           2.1689954 = score(doc=8281,freq=1.0), product of:
             0.48069376 = queryWeight, product of:
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.066582225 = queryNorm
             4.512219 = fieldWeight in 8281, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.625 = fieldNorm(doc=8281)
       0.5 = coord(1/2)
   

5. Leydesdorff, L.: Why words and co-word cannot map the development of the science (1997) 1.08

   1.0844977 = sum of:
     1.0844977 = product of:
       2.1689954 = sum of:
         2.1689954 = weight(author_txt:leydesdorff in 147) [ClassicSimilarity], result of:
           2.1689954 = score(doc=147,freq=1.0), product of:
             0.48069376 = queryWeight, product of:
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.066582225 = queryNorm
             4.512219 = fieldWeight in 147, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.625 = fieldNorm(doc=147)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Leydesdorff, L.; Opthof, T.: Scopus's source normalized impact per paper (SNIP) versus a journal impact factor based on fractional counting of citations (2010) 0.63

   0.62958 = sum of:
     0.62958 = product of:
       1.3116251 = sum of:
         0.06143161 = weight(abstract_txt:rankings in 4107) [ClassicSimilarity], result of:
           0.06143161 = score(doc=4107,freq=1.0), product of:
             0.11421329 = queryWeight, product of:
               1.06567 = boost
               6.8847027 = idf(docFreq=122, maxDocs=44218)
               0.015567135 = queryNorm
             0.5378674 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.8847027 = idf(docFreq=122, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.06348818 = weight(abstract_txt:impacts in 4107) [ClassicSimilarity], result of:
           0.06348818 = score(doc=4107,freq=1.0), product of:
             0.11674832 = queryWeight, product of:
               1.0774317 = boost
               6.9606886 = idf(docFreq=113, maxDocs=44218)
               0.015567135 = queryNorm
             0.5438038 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9606886 = idf(docFreq=113, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.021668868 = weight(abstract_txt:science in 4107) [ClassicSimilarity], result of:
           0.021668868 = score(doc=4107,freq=1.0), product of:
             0.07183833 = queryWeight, product of:
               1.1952466 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015567135 = queryNorm
             0.3016338 = fieldWeight in 4107, 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=4107)
         0.047949255 = weight(abstract_txt:fields in 4107) [ClassicSimilarity], result of:
           0.047949255 = score(doc=4107,freq=1.0), product of:
             0.121988796 = queryWeight, product of:
               1.5575407 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015567135 = queryNorm
             0.39306277 = fieldWeight in 4107, 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=4107)
         0.081034884 = weight(abstract_txt:citations in 4107) [ClassicSimilarity], result of:
           0.081034884 = score(doc=4107,freq=2.0), product of:
             0.13737364 = queryWeight, product of:
               1.6528412 = boost
               5.339045 = idf(docFreq=576, maxDocs=44218)
               0.015567135 = queryNorm
             0.5898867 = fieldWeight in 4107, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.339045 = idf(docFreq=576, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.11322112 = weight(abstract_txt:citing in 4107) [ClassicSimilarity], result of:
           0.11322112 = score(doc=4107,freq=1.0), product of:
             0.21631353 = queryWeight, product of:
               2.0740597 = boost
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.015567135 = queryNorm
             0.5234121 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.05233348 = weight(abstract_txt:among in 4107) [ClassicSimilarity], result of:
           0.05233348 = score(doc=4107,freq=1.0), product of:
             0.14802971 = queryWeight, product of:
               2.1013553 = boost
               4.5252304 = idf(docFreq=1301, maxDocs=44218)
               0.015567135 = queryNorm
             0.35353363 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5252304 = idf(docFreq=1301, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.066309005 = weight(abstract_txt:citation in 4107) [ClassicSimilarity], result of:
           0.066309005 = score(doc=4107,freq=1.0), product of:
             0.1733315 = queryWeight, product of:
               2.2738605 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015567135 = queryNorm
             0.38255602 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.16544089 = weight(abstract_txt:counting in 4107) [ClassicSimilarity], result of:
           0.16544089 = score(doc=4107,freq=1.0), product of:
             0.2785441 = queryWeight, product of:
               2.3535662 = boost
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.015567135 = queryNorm
             0.59394866 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.22942895 = weight(abstract_txt:fractional in 4107) [ClassicSimilarity], result of:
           0.22942895 = score(doc=4107,freq=1.0), product of:
             0.34638909 = queryWeight, product of:
               2.6245904 = boost
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.015567135 = queryNorm
             0.66234463 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.2465462 = weight(abstract_txt:normalization in 4107) [ClassicSimilarity], result of:
           0.2465462 = score(doc=4107,freq=1.0), product of:
             0.4160013 = queryWeight, product of:
               3.5226734 = boost
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.015567135 = queryNorm
             0.59265727 = fieldWeight in 4107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
         0.16277266 = weight(abstract_txt:differences in 4107) [ClassicSimilarity], result of:
           0.16277266 = score(doc=4107,freq=2.0), product of:
             0.29681763 = queryWeight, product of:
               3.841442 = boost
               4.9634852 = idf(docFreq=839, maxDocs=44218)
               0.015567135 = queryNorm
             0.54839283 = fieldWeight in 4107, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.9634852 = idf(docFreq=839, maxDocs=44218)
               0.078125 = fieldNorm(doc=4107)
       0.48 = coord(12/25)
   

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) 0.61

   0.61234266 = sum of:
     0.61234266 = product of:
       1.3916879 = sum of:
         0.03467019 = weight(abstract_txt:science in 4186) [ClassicSimilarity], result of:
           0.03467019 = score(doc=4186,freq=4.0), product of:
             0.07183833 = queryWeight, product of:
               1.1952466 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015567135 = 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)
         0.0767188 = weight(abstract_txt:fields in 4186) [ClassicSimilarity], result of:
           0.0767188 = score(doc=4186,freq=4.0), product of:
             0.121988796 = queryWeight, product of:
               1.5575407 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015567135 = 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)
         0.057561923 = weight(abstract_txt:journals in 4186) [ClassicSimilarity], result of:
           0.057561923 = score(doc=4186,freq=2.0), product of:
             0.126907 = queryWeight, product of:
               1.588628 = boost
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.015567135 = queryNorm
             0.4535756 = fieldWeight in 4186, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.090576895 = weight(abstract_txt:citing in 4186) [ClassicSimilarity], result of:
           0.090576895 = score(doc=4186,freq=1.0), product of:
             0.21631353 = queryWeight, product of:
               2.0740597 = boost
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.015567135 = queryNorm
             0.4187297 = fieldWeight in 4186, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.102552265 = weight(abstract_txt:among in 4186) [ClassicSimilarity], result of:
           0.102552265 = score(doc=4186,freq=6.0), product of:
             0.14802971 = queryWeight, product of:
               2.1013553 = boost
               4.5252304 = idf(docFreq=1301, maxDocs=44218)
               0.015567135 = queryNorm
             0.6927816 = fieldWeight in 4186, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.5252304 = idf(docFreq=1301, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.1299386 = weight(abstract_txt:citation in 4186) [ClassicSimilarity], result of:
           0.1299386 = score(doc=4186,freq=6.0), product of:
             0.1733315 = queryWeight, product of:
               2.2738605 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015567135 = 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)
         0.187175 = weight(abstract_txt:counting in 4186) [ClassicSimilarity], result of:
           0.187175 = score(doc=4186,freq=2.0), product of:
             0.2785441 = queryWeight, product of:
               2.3535662 = boost
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.015567135 = queryNorm
             0.6719762 = fieldWeight in 4186, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.25956923 = weight(abstract_txt:fractional in 4186) [ClassicSimilarity], result of:
           0.25956923 = score(doc=4186,freq=2.0), product of:
             0.34638909 = queryWeight, product of:
               2.6245904 = boost
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.015567135 = queryNorm
             0.7493574 = fieldWeight in 4186, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.049795117 = weight(abstract_txt:terms in 4186) [ClassicSimilarity], result of:
           0.049795117 = score(doc=4186,freq=1.0), product of:
             0.19701982 = queryWeight, product of:
               3.129712 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.015567135 = queryNorm
             0.25274166 = fieldWeight in 4186, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.19723696 = weight(abstract_txt:normalization in 4186) [ClassicSimilarity], result of:
           0.19723696 = score(doc=4186,freq=1.0), product of:
             0.4160013 = queryWeight, product of:
               3.5226734 = boost
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.015567135 = queryNorm
             0.47412583 = fieldWeight in 4186, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
         0.20589295 = weight(abstract_txt:differences in 4186) [ClassicSimilarity], result of:
           0.20589295 = score(doc=4186,freq=5.0), product of:
             0.29681763 = queryWeight, product of:
               3.841442 = boost
               4.9634852 = idf(docFreq=839, maxDocs=44218)
               0.015567135 = queryNorm
             0.6936682 = fieldWeight in 4186, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.9634852 = idf(docFreq=839, maxDocs=44218)
               0.0625 = fieldNorm(doc=4186)
       0.44 = coord(11/25)
   

3. Leydesdorff, L.; Radicchi, F.; Bornmann, L.; Castellano, C.; Nooy, W. de: Field-normalized impact factors (IFs) : a comparison of rescaling and fractionally counted IFs (2013) 0.50

   0.4989766 = sum of:
     0.4989766 = product of:
       1.386046 = sum of:
         0.043337736 = weight(abstract_txt:science in 1108) [ClassicSimilarity], result of:
           0.043337736 = score(doc=1108,freq=4.0), product of:
             0.07183833 = queryWeight, product of:
               1.1952466 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015567135 = queryNorm
             0.6032676 = fieldWeight in 1108, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
         0.047949255 = weight(abstract_txt:fields in 1108) [ClassicSimilarity], result of:
           0.047949255 = score(doc=1108,freq=1.0), product of:
             0.121988796 = queryWeight, product of:
               1.5575407 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015567135 = queryNorm
             0.39306277 = fieldWeight in 1108, 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=1108)
         0.050878033 = weight(abstract_txt:journals in 1108) [ClassicSimilarity], result of:
           0.050878033 = score(doc=1108,freq=1.0), product of:
             0.126907 = queryWeight, product of:
               1.588628 = boost
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.015567135 = queryNorm
             0.400908 = fieldWeight in 1108, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
         0.09924706 = weight(abstract_txt:citations in 1108) [ClassicSimilarity], result of:
           0.09924706 = score(doc=1108,freq=3.0), product of:
             0.13737364 = queryWeight, product of:
               1.6528412 = boost
               5.339045 = idf(docFreq=576, maxDocs=44218)
               0.015567135 = queryNorm
             0.72246075 = fieldWeight in 1108, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.339045 = idf(docFreq=576, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
         0.05233348 = weight(abstract_txt:among in 1108) [ClassicSimilarity], result of:
           0.05233348 = score(doc=1108,freq=1.0), product of:
             0.14802971 = queryWeight, product of:
               2.1013553 = boost
               4.5252304 = idf(docFreq=1301, maxDocs=44218)
               0.015567135 = queryNorm
             0.35353363 = fieldWeight in 1108, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5252304 = idf(docFreq=1301, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
         0.13261801 = weight(abstract_txt:citation in 1108) [ClassicSimilarity], result of:
           0.13261801 = score(doc=1108,freq=4.0), product of:
             0.1733315 = queryWeight, product of:
               2.2738605 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015567135 = queryNorm
             0.76511204 = fieldWeight in 1108, 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=1108)
         0.286552 = weight(abstract_txt:counting in 1108) [ClassicSimilarity], result of:
           0.286552 = score(doc=1108,freq=3.0), product of:
             0.2785441 = queryWeight, product of:
               2.3535662 = boost
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.015567135 = queryNorm
             1.0287492 = fieldWeight in 1108, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
         0.32446155 = weight(abstract_txt:fractional in 1108) [ClassicSimilarity], result of:
           0.32446155 = score(doc=1108,freq=2.0), product of:
             0.34638909 = queryWeight, product of:
               2.6245904 = boost
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.015567135 = queryNorm
             0.93669677 = fieldWeight in 1108, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
         0.34866896 = weight(abstract_txt:normalization in 1108) [ClassicSimilarity], result of:
           0.34866896 = score(doc=1108,freq=2.0), product of:
             0.4160013 = queryWeight, product of:
               3.5226734 = boost
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.015567135 = queryNorm
             0.83814394 = fieldWeight in 1108, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.078125 = fieldNorm(doc=1108)
       0.36 = coord(9/25)
   

4. Zitt, M.; Small, H.: Modifying the journal impact factor by fractional citation weighting : the audience factor (2008) 0.48

   0.48311508 = sum of:
     0.48311508 = product of:
       1.3419863 = sum of:
         0.06143161 = weight(abstract_txt:rankings in 2363) [ClassicSimilarity], result of:
           0.06143161 = score(doc=2363,freq=1.0), product of:
             0.11421329 = queryWeight, product of:
               1.06567 = boost
               6.8847027 = idf(docFreq=122, maxDocs=44218)
               0.015567135 = queryNorm
             0.5378674 = fieldWeight in 2363, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.8847027 = idf(docFreq=122, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.047949255 = weight(abstract_txt:fields in 2363) [ClassicSimilarity], result of:
           0.047949255 = score(doc=2363,freq=1.0), product of:
             0.121988796 = queryWeight, product of:
               1.5575407 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015567135 = queryNorm
             0.39306277 = fieldWeight in 2363, 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=2363)
         0.08812334 = weight(abstract_txt:journals in 2363) [ClassicSimilarity], result of:
           0.08812334 = score(doc=2363,freq=3.0), product of:
             0.126907 = queryWeight, product of:
               1.588628 = boost
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.015567135 = queryNorm
             0.694393 = fieldWeight in 2363, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.057300314 = weight(abstract_txt:citations in 2363) [ClassicSimilarity], result of:
           0.057300314 = score(doc=2363,freq=1.0), product of:
             0.13737364 = queryWeight, product of:
               1.6528412 = boost
               5.339045 = idf(docFreq=576, maxDocs=44218)
               0.015567135 = queryNorm
             0.4171129 = fieldWeight in 2363, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.339045 = idf(docFreq=576, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.27733397 = weight(abstract_txt:citing in 2363) [ClassicSimilarity], result of:
           0.27733397 = score(doc=2363,freq=6.0), product of:
             0.21631353 = queryWeight, product of:
               2.0740597 = boost
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.015567135 = queryNorm
             1.2820926 = fieldWeight in 2363, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.699675 = idf(docFreq=147, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.066309005 = weight(abstract_txt:citation in 2363) [ClassicSimilarity], result of:
           0.066309005 = score(doc=2363,freq=1.0), product of:
             0.1733315 = queryWeight, product of:
               2.2738605 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015567135 = queryNorm
             0.38255602 = fieldWeight in 2363, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.16544089 = weight(abstract_txt:counting in 2363) [ClassicSimilarity], result of:
           0.16544089 = score(doc=2363,freq=1.0), product of:
             0.2785441 = queryWeight, product of:
               2.3535662 = boost
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.015567135 = queryNorm
             0.59394866 = fieldWeight in 2363, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.22942895 = weight(abstract_txt:fractional in 2363) [ClassicSimilarity], result of:
           0.22942895 = score(doc=2363,freq=1.0), product of:
             0.34638909 = queryWeight, product of:
               2.6245904 = boost
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.015567135 = queryNorm
             0.66234463 = fieldWeight in 2363, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
         0.34866896 = weight(abstract_txt:normalization in 2363) [ClassicSimilarity], result of:
           0.34866896 = score(doc=2363,freq=2.0), product of:
             0.4160013 = queryWeight, product of:
               3.5226734 = boost
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.015567135 = queryNorm
             0.83814394 = fieldWeight in 2363, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.078125 = fieldNorm(doc=2363)
       0.36 = coord(9/25)
   

5. Leydesdorff, L.; Zhou, P.; Bornmann, L.: How can journal impact factors be normalized across fields of science? : An assessment in terms of percentile ranks and fractional counts (2013) 0.35

   0.3493823 = sum of:
     0.3493823 = product of:
       1.0918198 = sum of:
         0.024515525 = weight(abstract_txt:science in 532) [ClassicSimilarity], result of:
           0.024515525 = score(doc=532,freq=2.0), product of:
             0.07183833 = queryWeight, product of:
               1.1952466 = boost
               3.8609126 = idf(docFreq=2529, maxDocs=44218)
               0.015567135 = queryNorm
             0.3412597 = fieldWeight in 532, 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=532)
         0.054248385 = weight(abstract_txt:fields in 532) [ClassicSimilarity], result of:
           0.054248385 = score(doc=532,freq=2.0), product of:
             0.121988796 = queryWeight, product of:
               1.5575407 = boost
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.015567135 = queryNorm
             0.44469973 = fieldWeight in 532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.0312033 = idf(docFreq=784, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
         0.07049867 = weight(abstract_txt:journals in 532) [ClassicSimilarity], result of:
           0.07049867 = score(doc=532,freq=3.0), product of:
             0.126907 = queryWeight, product of:
               1.588628 = boost
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.015567135 = queryNorm
             0.5555144 = fieldWeight in 532, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1316223 = idf(docFreq=709, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
         0.10609441 = weight(abstract_txt:citation in 532) [ClassicSimilarity], result of:
           0.10609441 = score(doc=532,freq=4.0), product of:
             0.1733315 = queryWeight, product of:
               2.2738605 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.015567135 = queryNorm
             0.61208963 = fieldWeight in 532, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
         0.22924162 = weight(abstract_txt:counting in 532) [ClassicSimilarity], result of:
           0.22924162 = score(doc=532,freq=3.0), product of:
             0.2785441 = queryWeight, product of:
               2.3535662 = boost
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.015567135 = queryNorm
             0.8229994 = fieldWeight in 532, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.602543 = idf(docFreq=59, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
         0.31790608 = weight(abstract_txt:fractional in 532) [ClassicSimilarity], result of:
           0.31790608 = score(doc=532,freq=3.0), product of:
             0.34638909 = queryWeight, product of:
               2.6245904 = boost
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.015567135 = queryNorm
             0.91777164 = fieldWeight in 532, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
         0.19723696 = weight(abstract_txt:normalization in 532) [ClassicSimilarity], result of:
           0.19723696 = score(doc=532,freq=1.0), product of:
             0.4160013 = queryWeight, product of:
               3.5226734 = boost
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.015567135 = queryNorm
             0.47412583 = fieldWeight in 532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
         0.09207812 = weight(abstract_txt:differences in 532) [ClassicSimilarity], result of:
           0.09207812 = score(doc=532,freq=1.0), product of:
             0.29681763 = queryWeight, product of:
               3.841442 = boost
               4.9634852 = idf(docFreq=839, maxDocs=44218)
               0.015567135 = queryNorm
             0.31021783 = fieldWeight in 532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9634852 = idf(docFreq=839, maxDocs=44218)
               0.0625 = fieldNorm(doc=532)
       0.32 = coord(8/25)