Document (#28263)

Author

Frandsen, T.F.
Rousseau, R.

Title

Article impact calculated over arbitrary periods

Source

Journal of the American Society for Information Science and Technology. 56(2005) no.1, S.58-62

Year

2005

Abstract

In this paper we address the various formulations of impact of articles, usually groups of articles as gauged by citations that these articles receive over a certain period of time. The journal impact factor, as published by ISI (Philadelphia, PA), is the best-known example of a formulation of impact of journals (considered as a set of articles) but many others have been defined in the literature. Impact factors have varying publication and citation periods and the chosen length of these periods enables, e.g., a distinction between synchronous and diachronous impact factors. It is shown how an impact factor for the general case can be defined. Two alternatives for a general impact factor are proposed, depending an whether different publication years are seen as a whole, and hence treating each one of them differently, or by operating with citation periods of identical length but allowing each publication period different starting points.

Theme

Informetrie
Citation indexing

Similar documents (author)

1. Frandsen, T.F.; Rousseau, R.; Rowlands, I.: Diffusion factors (2006) 4.41

   4.4064016 = sum of:
     4.4064016 = sum of:
       1.6296247 = weight(author_txt:rousseau in 585) [ClassicSimilarity], result of:
         1.6296247 = score(doc=585,freq=1.0), product of:
           0.57399374 = queryWeight, product of:
             7.570929 = idf(docFreq=60, maxDocs=43556)
             0.0758155 = queryNorm
           2.8390985 = fieldWeight in 585, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.570929 = idf(docFreq=60, maxDocs=43556)
             0.375 = fieldNorm(doc=585)
       2.776777 = weight(author_txt:frandsen in 585) [ClassicSimilarity], result of:
         2.776777 = score(doc=585,freq=1.0), product of:
           0.8188596 = queryWeight, product of:
             1.1944036 = boost
             9.042746 = idf(docFreq=13, maxDocs=43556)
             0.0758155 = queryNorm
           3.3910296 = fieldWeight in 585, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.042746 = idf(docFreq=13, maxDocs=43556)
             0.375 = fieldNorm(doc=585)
   

2. Frandsen, T.F.: Journal diffusion factors - a measure of diffusion? (2004) 2.31

   2.313981 = sum of:
     2.313981 = product of:
       4.627962 = sum of:
         4.627962 = weight(author_txt:frandsen in 1801) [ClassicSimilarity], result of:
           4.627962 = score(doc=1801,freq=1.0), product of:
             0.8188596 = queryWeight, product of:
               1.1944036 = boost
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.0758155 = queryNorm
             5.651716 = fieldWeight in 1801, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.625 = fieldNorm(doc=1801)
       0.5 = coord(1/2)
   

3. Frandsen, T.F.: ¬The integration of open access journals in the scholarly communication system : three science fields (2009) 2.31

   2.313981 = sum of:
     2.313981 = product of:
       4.627962 = sum of:
         4.627962 = weight(author_txt:frandsen in 1208) [ClassicSimilarity], result of:
           4.627962 = score(doc=1208,freq=1.0), product of:
             0.8188596 = queryWeight, product of:
               1.1944036 = boost
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.0758155 = queryNorm
             5.651716 = fieldWeight in 1208, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.625 = fieldNorm(doc=1208)
       0.5 = coord(1/2)
   

4. Frandsen, T.F.; Nicolaisen, J.: Rejoinder: Noble prize effects in citation networks (2017) 1.85

   1.8511847 = sum of:
     1.8511847 = product of:
       3.7023695 = sum of:
         3.7023695 = weight(author_txt:frandsen in 653) [ClassicSimilarity], result of:
           3.7023695 = score(doc=653,freq=1.0), product of:
             0.8188596 = queryWeight, product of:
               1.1944036 = boost
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.0758155 = queryNorm
             4.521373 = fieldWeight in 653, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.5 = fieldNorm(doc=653)
       0.5 = coord(1/2)
   

5. Frandsen, T.F.; Nicolaisen, J.: Intradisciplinary differences in database coverage and the consequences for bibliometric research (2008) 1.85

   1.8511847 = sum of:
     1.8511847 = product of:
       3.7023695 = sum of:
         3.7023695 = weight(author_txt:frandsen in 389) [ClassicSimilarity], result of:
           3.7023695 = score(doc=389,freq=1.0), product of:
             0.8188596 = queryWeight, product of:
               1.1944036 = boost
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.0758155 = queryNorm
             4.521373 = fieldWeight in 389, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.042746 = idf(docFreq=13, maxDocs=43556)
               0.5 = fieldNorm(doc=389)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Mukherjee, B.: Do open-access journals in library and information science have any scholarly impact? : a bibliometric study of selected open-access journals using Google Scholar (2009) 0.36

   0.35593048 = sum of:
     0.35593048 = product of:
       1.1122828 = sum of:
         0.14969818 = weight(abstract_txt:synchronous in 4743) [ClassicSimilarity], result of:
           0.14969818 = score(doc=4743,freq=2.0), product of:
             0.19140245 = queryWeight, product of:
               1.2556401 = boost
               8.848589 = idf(docFreq=16, maxDocs=43556)
               0.017226946 = queryNorm
             0.7821121 = fieldWeight in 4743, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.848589 = idf(docFreq=16, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.17827661 = weight(abstract_txt:diachronous in 4743) [ClassicSimilarity], result of:
           0.17827661 = score(doc=4743,freq=2.0), product of:
             0.21504667 = queryWeight, product of:
               1.330938 = boost
               9.379218 = idf(docFreq=9, maxDocs=43556)
               0.017226946 = queryNorm
             0.8290136 = fieldWeight in 4743, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.379218 = idf(docFreq=9, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.06268785 = weight(abstract_txt:citation in 4743) [ClassicSimilarity], result of:
           0.06268785 = score(doc=4743,freq=3.0), product of:
             0.117915705 = queryWeight, product of:
               1.3937737 = boost
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.017226946 = queryNorm
             0.5316328 = fieldWeight in 4743, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.07749433 = weight(abstract_txt:period in 4743) [ClassicSimilarity], result of:
           0.07749433 = score(doc=4743,freq=2.0), product of:
             0.15547472 = queryWeight, product of:
               1.6004287 = boost
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.017226946 = queryNorm
             0.49843687 = fieldWeight in 4743, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.07026984 = weight(abstract_txt:publication in 4743) [ClassicSimilarity], result of:
           0.07026984 = score(doc=4743,freq=1.0), product of:
             0.21007104 = queryWeight, product of:
               2.2784274 = boost
               5.352082 = idf(docFreq=560, maxDocs=43556)
               0.017226946 = queryNorm
             0.3345051 = fieldWeight in 4743, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.352082 = idf(docFreq=560, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.15567507 = weight(abstract_txt:factor in 4743) [ClassicSimilarity], result of:
           0.15567507 = score(doc=4743,freq=3.0), product of:
             0.24752887 = queryWeight, product of:
               2.4732327 = boost
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.017226946 = queryNorm
             0.6289168 = fieldWeight in 4743, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.17943805 = weight(abstract_txt:articles in 4743) [ClassicSimilarity], result of:
           0.17943805 = score(doc=4743,freq=7.0), product of:
             0.22581017 = queryWeight, product of:
               2.7276785 = boost
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.017226946 = queryNorm
             0.79464114 = fieldWeight in 4743, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
         0.23874289 = weight(abstract_txt:impact in 4743) [ClassicSimilarity], result of:
           0.23874289 = score(doc=4743,freq=4.0), product of:
             0.4147408 = queryWeight, product of:
               5.2278705 = boost
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.017226946 = queryNorm
             0.5756436 = fieldWeight in 4743, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.0625 = fieldNorm(doc=4743)
       0.32 = coord(8/25)
   

2. Nederhof, A.J.; Visser, M.S.: Quantitative deconstruction of citation impact indicators : waxing field impact but waning journal impact (2004) 0.24

   0.23992999 = sum of:
     0.23992999 = product of:
       0.8568928 = sum of:
         0.023544306 = weight(abstract_txt:over in 417) [ClassicSimilarity], result of:
           0.023544306 = score(doc=417,freq=1.0), product of:
             0.08852795 = queryWeight, product of:
               1.2076654 = boost
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.017226946 = queryNorm
             0.26595336 = fieldWeight in 417, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
         0.06268785 = weight(abstract_txt:citation in 417) [ClassicSimilarity], result of:
           0.06268785 = score(doc=417,freq=3.0), product of:
             0.117915705 = queryWeight, product of:
               1.3937737 = boost
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.017226946 = queryNorm
             0.5316328 = fieldWeight in 417, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
         0.121710934 = weight(abstract_txt:publication in 417) [ClassicSimilarity], result of:
           0.121710934 = score(doc=417,freq=3.0), product of:
             0.21007104 = queryWeight, product of:
               2.2784274 = boost
               5.352082 = idf(docFreq=560, maxDocs=43556)
               0.017226946 = queryNorm
             0.57937986 = fieldWeight in 417, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.352082 = idf(docFreq=560, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
         0.08987904 = weight(abstract_txt:factor in 417) [ClassicSimilarity], result of:
           0.08987904 = score(doc=417,freq=1.0), product of:
             0.24752887 = queryWeight, product of:
               2.4732327 = boost
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.017226946 = queryNorm
             0.3631053 = fieldWeight in 417, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
         0.06782121 = weight(abstract_txt:articles in 417) [ClassicSimilarity], result of:
           0.06782121 = score(doc=417,freq=1.0), product of:
             0.22581017 = queryWeight, product of:
               2.7276785 = boost
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.017226946 = queryNorm
             0.30034614 = fieldWeight in 417, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
         0.22432677 = weight(abstract_txt:periods in 417) [ClassicSimilarity], result of:
           0.22432677 = score(doc=417,freq=1.0), product of:
             0.5012879 = queryWeight, product of:
               4.064106 = boost
               7.160014 = idf(docFreq=91, maxDocs=43556)
               0.017226946 = queryNorm
             0.44750088 = fieldWeight in 417, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.160014 = idf(docFreq=91, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
         0.26692268 = weight(abstract_txt:impact in 417) [ClassicSimilarity], result of:
           0.26692268 = score(doc=417,freq=5.0), product of:
             0.4147408 = queryWeight, product of:
               5.2278705 = boost
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.017226946 = queryNorm
             0.64358914 = fieldWeight in 417, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.0625 = fieldNorm(doc=417)
       0.28 = coord(7/25)
   

3. Frandsen, T.F.; Rousseau, R.; Rowlands, I.: Diffusion factors (2006) 0.24

   0.23840071 = sum of:
     0.23840071 = product of:
       0.6622242 = sum of:
         0.013293368 = weight(abstract_txt:different in 585) [ClassicSimilarity], result of:
           0.013293368 = score(doc=585,freq=1.0), product of:
             0.06610604 = queryWeight, product of:
               1.043583 = boost
               3.6771033 = idf(docFreq=2994, maxDocs=43556)
               0.017226946 = queryNorm
             0.20109159 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6771033 = idf(docFreq=2994, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.09262103 = weight(abstract_txt:synchronous in 585) [ClassicSimilarity], result of:
           0.09262103 = score(doc=585,freq=1.0), product of:
             0.19140245 = queryWeight, product of:
               1.2556401 = boost
               8.848589 = idf(docFreq=16, maxDocs=43556)
               0.017226946 = queryNorm
             0.48390722 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.848589 = idf(docFreq=16, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.11030303 = weight(abstract_txt:diachronous in 585) [ClassicSimilarity], result of:
           0.11030303 = score(doc=585,freq=1.0), product of:
             0.21504667 = queryWeight, product of:
               1.330938 = boost
               9.379218 = idf(docFreq=9, maxDocs=43556)
               0.017226946 = queryNorm
             0.512926 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.379218 = idf(docFreq=9, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.05485187 = weight(abstract_txt:citation in 585) [ClassicSimilarity], result of:
           0.05485187 = score(doc=585,freq=3.0), product of:
             0.117915705 = queryWeight, product of:
               1.3937737 = boost
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.017226946 = queryNorm
             0.46517867 = fieldWeight in 585, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.087231055 = weight(abstract_txt:factors in 585) [ClassicSimilarity], result of:
           0.087231055 = score(doc=585,freq=7.0), product of:
             0.12112465 = queryWeight, product of:
               1.4126114 = boost
               4.9773884 = idf(docFreq=815, maxDocs=43556)
               0.017226946 = queryNorm
             0.7201759 = fieldWeight in 585, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.9773884 = idf(docFreq=815, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.06148611 = weight(abstract_txt:publication in 585) [ClassicSimilarity], result of:
           0.06148611 = score(doc=585,freq=1.0), product of:
             0.21007104 = queryWeight, product of:
               2.2784274 = boost
               5.352082 = idf(docFreq=560, maxDocs=43556)
               0.017226946 = queryNorm
             0.29269198 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.352082 = idf(docFreq=560, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.078644164 = weight(abstract_txt:factor in 585) [ClassicSimilarity], result of:
           0.078644164 = score(doc=585,freq=1.0), product of:
             0.24752887 = queryWeight, product of:
               2.4732327 = boost
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.017226946 = queryNorm
             0.31771713 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.05934356 = weight(abstract_txt:articles in 585) [ClassicSimilarity], result of:
           0.05934356 = score(doc=585,freq=1.0), product of:
             0.22581017 = queryWeight, product of:
               2.7276785 = boost
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.017226946 = queryNorm
             0.26280287 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
         0.10445002 = weight(abstract_txt:impact in 585) [ClassicSimilarity], result of:
           0.10445002 = score(doc=585,freq=1.0), product of:
             0.4147408 = queryWeight, product of:
               5.2278705 = boost
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.017226946 = queryNorm
             0.25184408 = fieldWeight in 585, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.0546875 = fieldNorm(doc=585)
       0.36 = coord(9/25)
   

4. Leydesdorff, L.; Goldstone, R.L.: Interdisciplinarity at the journal and specialty level : the changing knowledge bases of the journal cognitive science (2014) 0.23

   0.23163404 = sum of:
     0.23163404 = product of:
       0.7238564 = sum of:
         0.0746726 = weight(abstract_txt:differently in 3185) [ClassicSimilarity], result of:
           0.0746726 = score(doc=3185,freq=1.0), product of:
             0.13071156 = queryWeight, product of:
               1.0376441 = boost
               7.312355 = idf(docFreq=78, maxDocs=43556)
               0.017226946 = queryNorm
             0.57127774 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.312355 = idf(docFreq=78, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.018990526 = weight(abstract_txt:different in 3185) [ClassicSimilarity], result of:
           0.018990526 = score(doc=3185,freq=1.0), product of:
             0.06610604 = queryWeight, product of:
               1.043583 = boost
               3.6771033 = idf(docFreq=2994, maxDocs=43556)
               0.017226946 = queryNorm
             0.2872737 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6771033 = idf(docFreq=2994, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.02943038 = weight(abstract_txt:over in 3185) [ClassicSimilarity], result of:
           0.02943038 = score(doc=3185,freq=1.0), product of:
             0.08852795 = queryWeight, product of:
               1.2076654 = boost
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.017226946 = queryNorm
             0.3324417 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.054733116 = weight(abstract_txt:defined in 3185) [ClassicSimilarity], result of:
           0.054733116 = score(doc=3185,freq=1.0), product of:
             0.13388027 = queryWeight, product of:
               1.4851309 = boost
               5.2329135 = idf(docFreq=631, maxDocs=43556)
               0.017226946 = queryNorm
             0.40882137 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.2329135 = idf(docFreq=631, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.06849597 = weight(abstract_txt:period in 3185) [ClassicSimilarity], result of:
           0.06849597 = score(doc=3185,freq=1.0), product of:
             0.15547472 = queryWeight, product of:
               1.6004287 = boost
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.017226946 = queryNorm
             0.44056013 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.1123488 = weight(abstract_txt:factor in 3185) [ClassicSimilarity], result of:
           0.1123488 = score(doc=3185,freq=1.0), product of:
             0.24752887 = queryWeight, product of:
               2.4732327 = boost
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.017226946 = queryNorm
             0.45388162 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.08477651 = weight(abstract_txt:articles in 3185) [ClassicSimilarity], result of:
           0.08477651 = score(doc=3185,freq=1.0), product of:
             0.22581017 = queryWeight, product of:
               2.7276785 = boost
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.017226946 = queryNorm
             0.37543267 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.805538 = idf(docFreq=968, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
         0.28040847 = weight(abstract_txt:periods in 3185) [ClassicSimilarity], result of:
           0.28040847 = score(doc=3185,freq=1.0), product of:
             0.5012879 = queryWeight, product of:
               4.064106 = boost
               7.160014 = idf(docFreq=91, maxDocs=43556)
               0.017226946 = queryNorm
             0.5593761 = fieldWeight in 3185, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.160014 = idf(docFreq=91, maxDocs=43556)
               0.078125 = fieldNorm(doc=3185)
       0.32 = coord(8/25)
   

5. Didegah, F.; Thelwall, M.: Determinants of research citation impact in nanoscience and nanotechnology (2013) 0.23

   0.23022014 = sum of:
     0.23022014 = product of:
       0.9592506 = sum of:
         0.0746726 = weight(abstract_txt:calculated in 2735) [ClassicSimilarity], result of:
           0.0746726 = score(doc=2735,freq=1.0), product of:
             0.13071156 = queryWeight, product of:
               1.0376441 = boost
               7.312355 = idf(docFreq=78, maxDocs=43556)
               0.017226946 = queryNorm
             0.57127774 = fieldWeight in 2735, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.312355 = idf(docFreq=78, maxDocs=43556)
               0.078125 = fieldNorm(doc=2735)
         0.07835982 = weight(abstract_txt:citation in 2735) [ClassicSimilarity], result of:
           0.07835982 = score(doc=2735,freq=3.0), product of:
             0.117915705 = queryWeight, product of:
               1.3937737 = boost
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.017226946 = queryNorm
             0.664541 = fieldWeight in 2735, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.911013 = idf(docFreq=871, maxDocs=43556)
               0.078125 = fieldNorm(doc=2735)
         0.06849597 = weight(abstract_txt:period in 2735) [ClassicSimilarity], result of:
           0.06849597 = score(doc=2735,freq=1.0), product of:
             0.15547472 = queryWeight, product of:
               1.6004287 = boost
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.017226946 = queryNorm
             0.44056013 = fieldWeight in 2735, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.078125 = fieldNorm(doc=2735)
         0.1588852 = weight(abstract_txt:factor in 2735) [ClassicSimilarity], result of:
           0.1588852 = score(doc=2735,freq=2.0), product of:
             0.24752887 = queryWeight, product of:
               2.4732327 = boost
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.017226946 = queryNorm
             0.6418855 = fieldWeight in 2735, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.8096848 = idf(docFreq=354, maxDocs=43556)
               0.078125 = fieldNorm(doc=2735)
         0.28040847 = weight(abstract_txt:periods in 2735) [ClassicSimilarity], result of:
           0.28040847 = score(doc=2735,freq=1.0), product of:
             0.5012879 = queryWeight, product of:
               4.064106 = boost
               7.160014 = idf(docFreq=91, maxDocs=43556)
               0.017226946 = queryNorm
             0.5593761 = fieldWeight in 2735, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.160014 = idf(docFreq=91, maxDocs=43556)
               0.078125 = fieldNorm(doc=2735)
         0.2984286 = weight(abstract_txt:impact in 2735) [ClassicSimilarity], result of:
           0.2984286 = score(doc=2735,freq=4.0), product of:
             0.4147408 = queryWeight, product of:
               5.2278705 = boost
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.017226946 = queryNorm
             0.7195545 = fieldWeight in 2735, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.605149 = idf(docFreq=1183, maxDocs=43556)
               0.078125 = fieldNorm(doc=2735)
       0.24 = coord(6/25)