Document (#32084)

Author

Leydesdorff, L.

Title

Visualization of the citation impact environments of scientific journals : an online mapping exercise

Source

Journal of the American Society for Information Science and Technology. 58(2007) no.1, S.25-38

Year

2007

Abstract

Aggregated journal-journal citation networks based on the Journal Citation Reports 2004 of the Science Citation Index (5,968 journals) and the Social Science Citation Index (1,712 journals) are made accessible from the perspective of any of these journals. A vector-space model Is used for normalization, and the results are brought online at http://www.leydesdorff.net/jcr04 as input files for the visualization program Pajek. The user is thus able to analyze the citation environment in terms of links and graphs. Furthermore, the local impact of a journal is defined as its share of the total citations in the specific journal's citation environments; the vertical size of the nodes is varied proportionally to this citation impact. The horizontal size of each node can be used to provide the same information after correction for within-journal (self-)citations. In the "citing" environment, the equivalents of this measure can be considered as a citation activity index which maps how the relevant journal environment is perceived by the collective of authors of a given journal. As a policy application, the mechanism of Interdisciplinary developments among the sciences is elaborated for the case of nanotechnology journals.

Theme

Informetrie
Citation indexing
Visualisierung

Similar documents (author)

1. Leydesdorff, L.: ¬The generation of aggregated journal-journal citation maps on the basis of the CD-ROM version of the Science Citation Index (1994) 4.51

   4.5062704 = sum of:
     4.5062704 = weight(author_txt:leydesdorff in 281) [ClassicSimilarity], result of:
       4.5062704 = fieldWeight in 281, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.210033 = idf(docFreq=84, maxDocs=42306)
         0.625 = fieldNorm(doc=281)
   

2. Leydesdorff, L.: Why words and co-word cannot map the development of the science (1997) 4.51

   4.5062704 = sum of:
     4.5062704 = weight(author_txt:leydesdorff in 1148) [ClassicSimilarity], result of:
       4.5062704 = fieldWeight in 1148, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.210033 = idf(docFreq=84, maxDocs=42306)
         0.625 = fieldNorm(doc=1148)
   

3. Leydesdorff, L.: Theories of citation? (1999) 4.51

   4.5062704 = sum of:
     4.5062704 = weight(author_txt:leydesdorff in 131) [ClassicSimilarity], result of:
       4.5062704 = fieldWeight in 131, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.210033 = idf(docFreq=84, maxDocs=42306)
         0.625 = fieldNorm(doc=131)
   

4. Leydesdorff, L.: ¬A sociological theory of communication : the self-organization of the knowledge-based society (2001) 4.51

   4.5062704 = sum of:
     4.5062704 = weight(author_txt:leydesdorff in 1185) [ClassicSimilarity], result of:
       4.5062704 = fieldWeight in 1185, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.210033 = idf(docFreq=84, maxDocs=42306)
         0.625 = fieldNorm(doc=1185)
   

5. Leydesdorff, L.: Dynamic and evolutionary updates of classificatory schemes in scientific journal structures (2002) 4.51

   4.5062704 = sum of:
     4.5062704 = weight(author_txt:leydesdorff in 2250) [ClassicSimilarity], result of:
       4.5062704 = fieldWeight in 2250, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.210033 = idf(docFreq=84, maxDocs=42306)
         0.625 = fieldNorm(doc=2250)
   

Similar documents (content)

1. Leydesdorff, L.: Betweenness centrality as an indicator of the interdisciplinarity of scientific journals (2007) 0.58

   0.58369833 = sum of:
     0.58369833 = product of:
       1.3265871 = sum of:
         0.014375852 = weight(abstract_txt:online in 2454) [ClassicSimilarity], result of:
           0.014375852 = score(doc=2454,freq=1.0), product of:
             0.06254097 = queryWeight, product of:
               1.0466586 = boost
               3.6778073 = idf(docFreq=2906, maxDocs=42306)
               0.016246902 = queryNorm
             0.22986296 = fieldWeight in 2454, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6778073 = idf(docFreq=2906, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.06280726 = weight(abstract_txt:normalization in 2454) [ClassicSimilarity], result of:
           0.06280726 = score(doc=2454,freq=1.0), product of:
             0.13265963 = queryWeight, product of:
               1.0778967 = boost
               7.5751467 = idf(docFreq=58, maxDocs=42306)
               0.016246902 = queryNorm
             0.47344667 = fieldWeight in 2454, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5751467 = idf(docFreq=58, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.024731059 = weight(abstract_txt:science in 2454) [ClassicSimilarity], result of:
           0.024731059 = score(doc=2454,freq=2.0), product of:
             0.07126791 = queryWeight, product of:
               1.1172999 = boost
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.016246902 = queryNorm
             0.34701535 = fieldWeight in 2454, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.105812125 = weight(abstract_txt:nanotechnology in 2454) [ClassicSimilarity], result of:
           0.105812125 = score(doc=2454,freq=1.0), product of:
             0.18782605 = queryWeight, product of:
               1.2825836 = boost
               9.013627 = idf(docFreq=13, maxDocs=42306)
               0.016246902 = queryNorm
             0.5633517 = fieldWeight in 2454, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.013627 = idf(docFreq=13, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.11115006 = weight(abstract_txt:environments in 2454) [ClassicSimilarity], result of:
           0.11115006 = score(doc=2454,freq=4.0), product of:
             0.15405011 = queryWeight, product of:
               1.642683 = boost
               5.772151 = idf(docFreq=357, maxDocs=42306)
               0.016246902 = queryNorm
             0.7215189 = fieldWeight in 2454, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.772151 = idf(docFreq=357, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.060232762 = weight(abstract_txt:size in 2454) [ClassicSimilarity], result of:
           0.060232762 = score(doc=2454,freq=1.0), product of:
             0.16254142 = queryWeight, product of:
               1.6873485 = boost
               5.929099 = idf(docFreq=305, maxDocs=42306)
               0.016246902 = queryNorm
             0.3705687 = fieldWeight in 2454, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.929099 = idf(docFreq=305, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.043017887 = weight(abstract_txt:impact in 2454) [ClassicSimilarity], result of:
           0.043017887 = score(doc=2454,freq=1.0), product of:
             0.14866383 = queryWeight, product of:
               1.9763829 = boost
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.016246902 = queryNorm
             0.2893635 = fieldWeight in 2454, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.06507692 = weight(abstract_txt:index in 2454) [ClassicSimilarity], result of:
           0.06507692 = score(doc=2454,freq=2.0), product of:
             0.15549411 = queryWeight, product of:
               2.0212748 = boost
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.016246902 = queryNorm
             0.41851693 = fieldWeight in 2454, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.20050925 = weight(abstract_txt:journals in 2454) [ClassicSimilarity], result of:
           0.20050925 = score(doc=2454,freq=4.0), product of:
             0.3098312 = queryWeight, product of:
               3.6834548 = boost
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.016246902 = queryNorm
             0.6471564 = fieldWeight in 2454, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.19974399 = weight(abstract_txt:journal in 2454) [ClassicSimilarity], result of:
           0.19974399 = score(doc=2454,freq=2.0), product of:
             0.4355828 = queryWeight, product of:
               5.167639 = boost
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.016246902 = queryNorm
             0.45856723 = fieldWeight in 2454, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
         0.43912992 = weight(abstract_txt:citation in 2454) [ClassicSimilarity], result of:
           0.43912992 = score(doc=2454,freq=8.0), product of:
             0.5044813 = queryWeight, product of:
               6.305965 = boost
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.016246902 = queryNorm
             0.87045825 = fieldWeight in 2454, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.0625 = fieldNorm(doc=2454)
       0.44 = coord(11/25)
   

2. Leydesdorff, L.; Salah, A.A.A.: Maps on the basis of the Arts & Humanities Citation Index : the journals Leonardo and Art Journal versus "digital humanities" as a topic (2010) 0.46

   0.4561492 = sum of:
     0.4561492 = product of:
       1.4254663 = sum of:
         0.07374092 = weight(abstract_txt:aggregated in 437) [ClassicSimilarity], result of:
           0.07374092 = score(doc=437,freq=1.0), product of:
             0.12723245 = queryWeight, product of:
               1.0556178 = boost
               7.4185777 = idf(docFreq=68, maxDocs=42306)
               0.016246902 = queryNorm
             0.5795764 = fieldWeight in 437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.4185777 = idf(docFreq=68, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.04371875 = weight(abstract_txt:science in 437) [ClassicSimilarity], result of:
           0.04371875 = score(doc=437,freq=4.0), product of:
             0.07126791 = queryWeight, product of:
               1.1172999 = boost
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.016246902 = queryNorm
             0.6134423 = fieldWeight in 437, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.07904286 = weight(abstract_txt:citations in 437) [ClassicSimilarity], result of:
           0.07904286 = score(doc=437,freq=2.0), product of:
             0.13326025 = queryWeight, product of:
               1.5278231 = boost
               5.36855 = idf(docFreq=535, maxDocs=42306)
               0.016246902 = queryNorm
             0.59314656 = fieldWeight in 437, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.36855 = idf(docFreq=535, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.05377236 = weight(abstract_txt:impact in 437) [ClassicSimilarity], result of:
           0.05377236 = score(doc=437,freq=1.0), product of:
             0.14866383 = queryWeight, product of:
               1.9763829 = boost
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.016246902 = queryNorm
             0.36170438 = fieldWeight in 437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.09962828 = weight(abstract_txt:index in 437) [ClassicSimilarity], result of:
           0.09962828 = score(doc=437,freq=3.0), product of:
             0.15549411 = queryWeight, product of:
               2.0212748 = boost
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.016246902 = queryNorm
             0.6407206 = fieldWeight in 437, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.30696586 = weight(abstract_txt:journals in 437) [ClassicSimilarity], result of:
           0.30696586 = score(doc=437,freq=6.0), product of:
             0.3098312 = queryWeight, product of:
               3.6834548 = boost
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.016246902 = queryNorm
             0.9907519 = fieldWeight in 437, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.43245843 = weight(abstract_txt:journal in 437) [ClassicSimilarity], result of:
           0.43245843 = score(doc=437,freq=6.0), product of:
             0.4355828 = queryWeight, product of:
               5.167639 = boost
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.016246902 = queryNorm
             0.9928272 = fieldWeight in 437, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
         0.3361388 = weight(abstract_txt:citation in 437) [ClassicSimilarity], result of:
           0.3361388 = score(doc=437,freq=3.0), product of:
             0.5044813 = queryWeight, product of:
               6.305965 = boost
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.016246902 = queryNorm
             0.6663058 = fieldWeight in 437, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.078125 = fieldNorm(doc=437)
       0.32 = coord(8/25)
   

3. Moed, H.F.; Leeuwen, T.N. van; Reedijk, J.: ¬A new classification system to describe the ageing of scientific journals and their impact factors (1998) 0.35

   0.35292396 = sum of:
     0.35292396 = product of:
       1.1028874 = sum of:
         0.021639677 = weight(abstract_txt:science in 720) [ClassicSimilarity], result of:
           0.021639677 = score(doc=720,freq=2.0), product of:
             0.07126791 = queryWeight, product of:
               1.1172999 = boost
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.016246902 = queryNorm
             0.30363843 = fieldWeight in 720, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.07584307 = weight(abstract_txt:journal's in 720) [ClassicSimilarity], result of:
           0.07584307 = score(doc=720,freq=1.0), product of:
             0.16443872 = queryWeight, product of:
               1.200079 = boost
               8.433808 = idf(docFreq=24, maxDocs=42306)
               0.016246902 = queryNorm
             0.4612239 = fieldWeight in 720, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.433808 = idf(docFreq=24, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.052703664 = weight(abstract_txt:size in 720) [ClassicSimilarity], result of:
           0.052703664 = score(doc=720,freq=1.0), product of:
             0.16254142 = queryWeight, product of:
               1.6873485 = boost
               5.929099 = idf(docFreq=305, maxDocs=42306)
               0.016246902 = queryNorm
             0.3242476 = fieldWeight in 720, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.929099 = idf(docFreq=305, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.10646384 = weight(abstract_txt:impact in 720) [ClassicSimilarity], result of:
           0.10646384 = score(doc=720,freq=8.0), product of:
             0.14866383 = queryWeight, product of:
               1.9763829 = boost
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.016246902 = queryNorm
             0.7161381 = fieldWeight in 720, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.056942303 = weight(abstract_txt:index in 720) [ClassicSimilarity], result of:
           0.056942303 = score(doc=720,freq=2.0), product of:
             0.15549411 = queryWeight, product of:
               2.0212748 = boost
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.016246902 = queryNorm
             0.36620232 = fieldWeight in 720, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.2148761 = weight(abstract_txt:journals in 720) [ClassicSimilarity], result of:
           0.2148761 = score(doc=720,freq=6.0), product of:
             0.3098312 = queryWeight, product of:
               3.6834548 = boost
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.016246902 = queryNorm
             0.6935263 = fieldWeight in 720, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.3027209 = weight(abstract_txt:journal in 720) [ClassicSimilarity], result of:
           0.3027209 = score(doc=720,freq=6.0), product of:
             0.4355828 = queryWeight, product of:
               5.167639 = boost
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.016246902 = queryNorm
             0.694979 = fieldWeight in 720, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
         0.27169776 = weight(abstract_txt:citation in 720) [ClassicSimilarity], result of:
           0.27169776 = score(doc=720,freq=4.0), product of:
             0.5044813 = queryWeight, product of:
               6.305965 = boost
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.016246902 = queryNorm
             0.53856856 = fieldWeight in 720, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.0546875 = fieldNorm(doc=720)
       0.32 = coord(8/25)
   

4. Campanario, J.M.: Self-citations that contribute to the journal impact factor : an investment-benefit-yield analysis (2010) 0.35

   0.34959918 = sum of:
     0.34959918 = product of:
       1.2485685 = sum of:
         0.021859376 = weight(abstract_txt:science in 1125) [ClassicSimilarity], result of:
           0.021859376 = score(doc=1125,freq=1.0), product of:
             0.07126791 = queryWeight, product of:
               1.1172999 = boost
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.016246902 = queryNorm
             0.30672115 = fieldWeight in 1125, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
         0.12497773 = weight(abstract_txt:citations in 1125) [ClassicSimilarity], result of:
           0.12497773 = score(doc=1125,freq=5.0), product of:
             0.13326025 = queryWeight, product of:
               1.5278231 = boost
               5.36855 = idf(docFreq=535, maxDocs=42306)
               0.016246902 = queryNorm
             0.937847 = fieldWeight in 1125, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.36855 = idf(docFreq=535, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
         0.12023866 = weight(abstract_txt:impact in 1125) [ClassicSimilarity], result of:
           0.12023866 = score(doc=1125,freq=5.0), product of:
             0.14866383 = queryWeight, product of:
               1.9763829 = boost
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.016246902 = queryNorm
             0.80879563 = fieldWeight in 1125, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
         0.057520412 = weight(abstract_txt:index in 1125) [ClassicSimilarity], result of:
           0.057520412 = score(doc=1125,freq=1.0), product of:
             0.15549411 = queryWeight, product of:
               2.0212748 = boost
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.016246902 = queryNorm
             0.3699202 = fieldWeight in 1125, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
         0.21705763 = weight(abstract_txt:journals in 1125) [ClassicSimilarity], result of:
           0.21705763 = score(doc=1125,freq=3.0), product of:
             0.3098312 = queryWeight, product of:
               3.6834548 = boost
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.016246902 = queryNorm
             0.70056736 = fieldWeight in 1125, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
         0.43245843 = weight(abstract_txt:journal in 1125) [ClassicSimilarity], result of:
           0.43245843 = score(doc=1125,freq=6.0), product of:
             0.4355828 = queryWeight, product of:
               5.167639 = boost
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.016246902 = queryNorm
             0.9928272 = fieldWeight in 1125, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
         0.2744562 = weight(abstract_txt:citation in 1125) [ClassicSimilarity], result of:
           0.2744562 = score(doc=1125,freq=2.0), product of:
             0.5044813 = queryWeight, product of:
               6.305965 = boost
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.016246902 = queryNorm
             0.5440364 = fieldWeight in 1125, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.078125 = fieldNorm(doc=1125)
       0.28 = coord(7/25)
   

5. Tsay, M.-Y.: From Science Citation Index to Journal Citation Reports, amd criteria for journals evaluation (1997) 0.35

   0.34501225 = sum of:
     0.34501225 = product of:
       1.2321866 = sum of:
         0.026231248 = weight(abstract_txt:science in 658) [ClassicSimilarity], result of:
           0.026231248 = score(doc=658,freq=1.0), product of:
             0.07126791 = queryWeight, product of:
               1.1172999 = boost
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.016246902 = queryNorm
             0.36806536 = fieldWeight in 658, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9260306 = idf(docFreq=2267, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
         0.09034914 = weight(abstract_txt:size in 658) [ClassicSimilarity], result of:
           0.09034914 = score(doc=658,freq=1.0), product of:
             0.16254142 = queryWeight, product of:
               1.6873485 = boost
               5.929099 = idf(docFreq=305, maxDocs=42306)
               0.016246902 = queryNorm
             0.555853 = fieldWeight in 658, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.929099 = idf(docFreq=305, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
         0.06452683 = weight(abstract_txt:impact in 658) [ClassicSimilarity], result of:
           0.06452683 = score(doc=658,freq=1.0), product of:
             0.14866383 = queryWeight, product of:
               1.9763829 = boost
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.016246902 = queryNorm
             0.43404526 = fieldWeight in 658, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.629816 = idf(docFreq=1121, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
         0.09761538 = weight(abstract_txt:index in 658) [ClassicSimilarity], result of:
           0.09761538 = score(doc=658,freq=2.0), product of:
             0.15549411 = queryWeight, product of:
               2.0212748 = boost
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.016246902 = queryNorm
             0.62777543 = fieldWeight in 658, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7349787 = idf(docFreq=1009, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
         0.15038194 = weight(abstract_txt:journals in 658) [ClassicSimilarity], result of:
           0.15038194 = score(doc=658,freq=1.0), product of:
             0.3098312 = queryWeight, product of:
               3.6834548 = boost
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.016246902 = queryNorm
             0.4853673 = fieldWeight in 658, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1772513 = idf(docFreq=648, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
         0.4737345 = weight(abstract_txt:journal in 658) [ClassicSimilarity], result of:
           0.4737345 = score(doc=658,freq=5.0), product of:
             0.4355828 = queryWeight, product of:
               5.167639 = boost
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.016246902 = queryNorm
             1.0875877 = fieldWeight in 658, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.188096 = idf(docFreq=641, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
         0.32934746 = weight(abstract_txt:citation in 658) [ClassicSimilarity], result of:
           0.32934746 = score(doc=658,freq=2.0), product of:
             0.5044813 = queryWeight, product of:
               6.305965 = boost
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.016246902 = queryNorm
             0.6528437 = fieldWeight in 658, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.9240556 = idf(docFreq=835, maxDocs=42306)
               0.09375 = fieldNorm(doc=658)
       0.28 = coord(7/25)