Document (#35333)

Author

Visscher, A. de

Title

¬An index to measure a scientist's specific impact

Source

Journal of the American Society for Information Science and Technology. 61(2010) no.2, S.319-328

Year

2010

Abstract

The specific impact index, or s-index, is introduced as a measure of a scientist's projected impact per paper. The index is complementary to other indices that measure overall impact as it can distinguish between authors maximizing the quantity of their output and authors maximizing the quality of their output. It also can be used to monitor career progress. The main advantage of the new index is that it reduces age bias from older papers that have more time to accumulate citations than do more recent papers. The index was tested on 24 scientists in different fields and of different statures. The overall projected impact estimated from the index correlates well with Hirsch's h-index squared (r**2=0.99). The impact of different aging models was evaluated as well.

Theme

Informetrie

Object

h-index

Similar documents (content)

1. Bornmann, L.; Mutz, R.; Daniel, H.D.: Do we need the h index and its variants in addition to standard bibliometric measures? (2009) 0.35

   0.3473251 = sum of:
     0.3473251 = product of:
       0.8683127 = sum of:
         0.07351147 = weight(abstract_txt:quantity in 3861) [ClassicSimilarity], result of:
           0.07351147 = score(doc=3861,freq=3.0), product of:
             0.1107085 = queryWeight, product of:
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.015792668 = queryNorm
             0.6640093 = fieldWeight in 3861, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.009777484 = weight(abstract_txt:that in 3861) [ClassicSimilarity], result of:
           0.009777484 = score(doc=3861,freq=4.0), product of:
             0.037799828 = queryWeight, product of:
               1.0120806 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.015792668 = queryNorm
             0.2586648 = fieldWeight in 3861, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.1183389 = weight(abstract_txt:indices in 3861) [ClassicSimilarity], result of:
           0.1183389 = score(doc=3861,freq=6.0), product of:
             0.120694056 = queryWeight, product of:
               1.044125 = boost
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.015792668 = queryNorm
             0.9804865 = fieldWeight in 3861, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.014644963 = weight(abstract_txt:well in 3861) [ClassicSimilarity], result of:
           0.014644963 = score(doc=3861,freq=1.0), product of:
             0.068620436 = queryWeight, product of:
               1.1134001 = boost
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.015792668 = queryNorm
             0.21341984 = fieldWeight in 3861, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.07193691 = weight(abstract_txt:papers in 3861) [ClassicSimilarity], result of:
           0.07193691 = score(doc=3861,freq=4.0), product of:
             0.12491344 = queryWeight, product of:
               1.5022047 = boost
               5.2653174 = idf(docFreq=623, maxDocs=44421)
               0.015792668 = queryNorm
             0.5758941 = fieldWeight in 3861, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.2653174 = idf(docFreq=623, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.01811705 = weight(abstract_txt:different in 3861) [ClassicSimilarity], result of:
           0.01811705 = score(doc=3861,freq=1.0), product of:
             0.09052114 = queryWeight, product of:
               1.5661926 = boost
               3.6597328 = idf(docFreq=3107, maxDocs=44421)
               0.015792668 = queryNorm
             0.20014164 = fieldWeight in 3861, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6597328 = idf(docFreq=3107, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.07221199 = weight(abstract_txt:output in 3861) [ClassicSimilarity], result of:
           0.07221199 = score(doc=3861,freq=2.0), product of:
             0.15778202 = queryWeight, product of:
               1.6883142 = boost
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.015792668 = queryNorm
             0.45766932 = fieldWeight in 3861, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.16546969 = weight(abstract_txt:scientist's in 3861) [ClassicSimilarity], result of:
           0.16546969 = score(doc=3861,freq=1.0), product of:
             0.34552032 = queryWeight, product of:
               2.4983962 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.015792668 = queryNorm
             0.47890002 = fieldWeight in 3861, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.14138226 = weight(abstract_txt:impact in 3861) [ClassicSimilarity], result of:
           0.14138226 = score(doc=3861,freq=4.0), product of:
             0.2826691 = queryWeight, product of:
               3.9140317 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.015792668 = queryNorm
             0.5001688 = fieldWeight in 3861, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
         0.18292199 = weight(abstract_txt:index in 3861) [ClassicSimilarity], result of:
           0.18292199 = score(doc=3861,freq=3.0), product of:
             0.40658516 = queryWeight, product of:
               5.420387 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.015792668 = queryNorm
             0.44989836 = fieldWeight in 3861, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3861)
       0.4 = coord(10/25)
   

2. Schreiber, M.: ¬An empirical investigation of the g-index for 26 physicists in comparison with the h-index, the A-index, and the R-index (2008) 0.30

   0.29692647 = sum of:
     0.29692647 = product of:
       0.8247957 = sum of:
         0.0079014 = weight(abstract_txt:that in 2968) [ClassicSimilarity], result of:
           0.0079014 = score(doc=2968,freq=2.0), product of:
             0.037799828 = queryWeight, product of:
               1.0120806 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.015792668 = queryNorm
             0.20903271 = fieldWeight in 2968, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.07808342 = weight(abstract_txt:indices in 2968) [ClassicSimilarity], result of:
           0.07808342 = score(doc=2968,freq=2.0), product of:
             0.120694056 = queryWeight, product of:
               1.044125 = boost
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.015792668 = queryNorm
             0.6469533 = fieldWeight in 2968, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.0167371 = weight(abstract_txt:well in 2968) [ClassicSimilarity], result of:
           0.0167371 = score(doc=2968,freq=1.0), product of:
             0.068620436 = queryWeight, product of:
               1.1134001 = boost
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.015792668 = queryNorm
             0.24390839 = fieldWeight in 2968, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.058133803 = weight(abstract_txt:papers in 2968) [ClassicSimilarity], result of:
           0.058133803 = score(doc=2968,freq=2.0), product of:
             0.12491344 = queryWeight, product of:
               1.5022047 = boost
               5.2653174 = idf(docFreq=623, maxDocs=44421)
               0.015792668 = queryNorm
             0.4653927 = fieldWeight in 2968, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.2653174 = idf(docFreq=623, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.029281575 = weight(abstract_txt:different in 2968) [ClassicSimilarity], result of:
           0.029281575 = score(doc=2968,freq=2.0), product of:
             0.09052114 = queryWeight, product of:
               1.5661926 = boost
               3.6597328 = idf(docFreq=3107, maxDocs=44421)
               0.015792668 = queryNorm
             0.32347775 = fieldWeight in 2968, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6597328 = idf(docFreq=3107, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.0583561 = weight(abstract_txt:output in 2968) [ClassicSimilarity], result of:
           0.0583561 = score(doc=2968,freq=1.0), product of:
             0.15778202 = queryWeight, product of:
               1.6883142 = boost
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.015792668 = queryNorm
             0.36985266 = fieldWeight in 2968, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.06785932 = weight(abstract_txt:measure in 2968) [ClassicSimilarity], result of:
           0.06785932 = score(doc=2968,freq=1.0), product of:
             0.199727 = queryWeight, product of:
               2.3264222 = boost
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.015792668 = queryNorm
             0.3397604 = fieldWeight in 2968, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.18910821 = weight(abstract_txt:scientist's in 2968) [ClassicSimilarity], result of:
           0.18910821 = score(doc=2968,freq=1.0), product of:
             0.34552032 = queryWeight, product of:
               2.4983962 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.015792668 = queryNorm
             0.5473143 = fieldWeight in 2968, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
         0.31933483 = weight(abstract_txt:index in 2968) [ClassicSimilarity], result of:
           0.31933483 = score(doc=2968,freq=7.0), product of:
             0.40658516 = queryWeight, product of:
               5.420387 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.015792668 = queryNorm
             0.785407 = fieldWeight in 2968, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=2968)
       0.36 = coord(9/25)
   

3. 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) 0.26

   0.255683 = sum of:
     0.255683 = product of:
       0.7990094 = sum of:
         0.04850499 = weight(abstract_txt:quantity in 2608) [ClassicSimilarity], result of:
           0.04850499 = score(doc=2608,freq=1.0), product of:
             0.1107085 = queryWeight, product of:
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.015792668 = queryNorm
             0.4381325 = fieldWeight in 2608, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.011174268 = weight(abstract_txt:that in 2608) [ClassicSimilarity], result of:
           0.011174268 = score(doc=2608,freq=4.0), product of:
             0.037799828 = queryWeight, product of:
               1.0120806 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.015792668 = queryNorm
             0.2956169 = fieldWeight in 2608, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.07808342 = weight(abstract_txt:indices in 2608) [ClassicSimilarity], result of:
           0.07808342 = score(doc=2608,freq=2.0), product of:
             0.120694056 = queryWeight, product of:
               1.044125 = boost
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.015792668 = queryNorm
             0.6469533 = fieldWeight in 2608, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.058133803 = weight(abstract_txt:papers in 2608) [ClassicSimilarity], result of:
           0.058133803 = score(doc=2608,freq=2.0), product of:
             0.12491344 = queryWeight, product of:
               1.5022047 = boost
               5.2653174 = idf(docFreq=623, maxDocs=44421)
               0.015792668 = queryNorm
             0.4653927 = fieldWeight in 2608, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.2653174 = idf(docFreq=623, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.0583561 = weight(abstract_txt:output in 2608) [ClassicSimilarity], result of:
           0.0583561 = score(doc=2608,freq=1.0), product of:
             0.15778202 = queryWeight, product of:
               1.6883142 = boost
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.015792668 = queryNorm
             0.36985266 = fieldWeight in 2608, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.18910821 = weight(abstract_txt:scientist's in 2608) [ClassicSimilarity], result of:
           0.18910821 = score(doc=2608,freq=1.0), product of:
             0.34552032 = queryWeight, product of:
               2.4983962 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.015792668 = queryNorm
             0.5473143 = fieldWeight in 2608, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.114254124 = weight(abstract_txt:impact in 2608) [ClassicSimilarity], result of:
           0.114254124 = score(doc=2608,freq=2.0), product of:
             0.2826691 = queryWeight, product of:
               3.9140317 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.015792668 = queryNorm
             0.40419742 = fieldWeight in 2608, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
         0.24139445 = weight(abstract_txt:index in 2608) [ClassicSimilarity], result of:
           0.24139445 = score(doc=2608,freq=4.0), product of:
             0.40658516 = queryWeight, product of:
               5.420387 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.015792668 = queryNorm
             0.5937119 = fieldWeight in 2608, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=2608)
       0.32 = coord(8/25)
   

4. Visscher, A. De: What does the g-index really measure? (2011) 0.24

   0.2401478 = sum of:
     0.2401478 = product of:
       1.0006158 = sum of:
         0.015616515 = weight(abstract_txt:that in 2053) [ClassicSimilarity], result of:
           0.015616515 = score(doc=2053,freq=5.0), product of:
             0.037799828 = queryWeight, product of:
               1.0120806 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.015792668 = queryNorm
             0.4131372 = fieldWeight in 2053, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.039738394 = weight(abstract_txt:specific in 2053) [ClassicSimilarity], result of:
           0.039738394 = score(doc=2053,freq=2.0), product of:
             0.083532766 = queryWeight, product of:
               1.2284372 = boost
               4.305746 = idf(docFreq=1628, maxDocs=44421)
               0.015792668 = queryNorm
             0.47572222 = fieldWeight in 2053, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.305746 = idf(docFreq=1628, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.08169603 = weight(abstract_txt:overall in 2053) [ClassicSimilarity], result of:
           0.08169603 = score(doc=2053,freq=2.0), product of:
             0.13505708 = queryWeight, product of:
               1.5620078 = boost
               5.474931 = idf(docFreq=505, maxDocs=44421)
               0.015792668 = queryNorm
             0.60490006 = fieldWeight in 2053, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.474931 = idf(docFreq=505, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.1696483 = weight(abstract_txt:measure in 2053) [ClassicSimilarity], result of:
           0.1696483 = score(doc=2053,freq=4.0), product of:
             0.199727 = queryWeight, product of:
               2.3264222 = boost
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.015792668 = queryNorm
             0.849401 = fieldWeight in 2053, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.26718736 = weight(abstract_txt:impact in 2053) [ClassicSimilarity], result of:
           0.26718736 = score(doc=2053,freq=7.0), product of:
             0.2826691 = queryWeight, product of:
               3.9140317 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.015792668 = queryNorm
             0.9452301 = fieldWeight in 2053, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.42672914 = weight(abstract_txt:index in 2053) [ClassicSimilarity], result of:
           0.42672914 = score(doc=2053,freq=8.0), product of:
             0.40658516 = queryWeight, product of:
               5.420387 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.015792668 = queryNorm
             1.0495443 = fieldWeight in 2053, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
       0.24 = coord(6/25)
   

5. Antonakis, J.; Lalive, R.: Quantifying scholarly impact : IQp versus the Hirsch h (2008) 0.23

   0.22618477 = sum of:
     0.22618477 = product of:
       0.7068274 = sum of:
         0.04850499 = weight(abstract_txt:quantity in 2722) [ClassicSimilarity], result of:
           0.04850499 = score(doc=2722,freq=1.0), product of:
             0.1107085 = queryWeight, product of:
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.015792668 = queryNorm
             0.4381325 = fieldWeight in 2722, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.005587134 = weight(abstract_txt:that in 2722) [ClassicSimilarity], result of:
           0.005587134 = score(doc=2722,freq=1.0), product of:
             0.037799828 = queryWeight, product of:
               1.0120806 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.015792668 = queryNorm
             0.14780845 = fieldWeight in 2722, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.08150748 = weight(abstract_txt:correlates in 2722) [ClassicSimilarity], result of:
           0.08150748 = score(doc=2722,freq=1.0), product of:
             0.15647861 = queryWeight, product of:
               1.1888772 = boost
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.015792668 = queryNorm
             0.52088577 = fieldWeight in 2722, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.031790715 = weight(abstract_txt:specific in 2722) [ClassicSimilarity], result of:
           0.031790715 = score(doc=2722,freq=2.0), product of:
             0.083532766 = queryWeight, product of:
               1.2284372 = boost
               4.305746 = idf(docFreq=1628, maxDocs=44421)
               0.015792668 = queryNorm
             0.38057777 = fieldWeight in 2722, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.305746 = idf(docFreq=1628, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.12543239 = weight(abstract_txt:hirsch's in 2722) [ClassicSimilarity], result of:
           0.12543239 = score(doc=2722,freq=1.0), product of:
             0.20857543 = queryWeight, product of:
               1.3725909 = boost
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.015792668 = queryNorm
             0.60137665 = fieldWeight in 2722, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.0583561 = weight(abstract_txt:output in 2722) [ClassicSimilarity], result of:
           0.0583561 = score(doc=2722,freq=1.0), product of:
             0.15778202 = queryWeight, product of:
               1.6883142 = boost
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.015792668 = queryNorm
             0.36985266 = fieldWeight in 2722, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9176426 = idf(docFreq=324, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.114254124 = weight(abstract_txt:impact in 2722) [ClassicSimilarity], result of:
           0.114254124 = score(doc=2722,freq=2.0), product of:
             0.2826691 = queryWeight, product of:
               3.9140317 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.015792668 = queryNorm
             0.40419742 = fieldWeight in 2722, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
         0.24139445 = weight(abstract_txt:index in 2722) [ClassicSimilarity], result of:
           0.24139445 = score(doc=2722,freq=4.0), product of:
             0.40658516 = queryWeight, product of:
               5.420387 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.015792668 = queryNorm
             0.5937119 = fieldWeight in 2722, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=2722)
       0.32 = coord(8/25)