Document (#28308)

Author

Kurtz, M.J.
Eichhorn, G.
Accomazzi, A.
Grant, C.
Demleitner, D.
Murray, S.S.
Martimbeau, N.
Elwell, B.

Title

¬The bibliometric properties of article readership information

Source

Journal of the American Society for Information Science and Technology. 56(2005) no.2, S.111-128

Year

2005

Abstract

Digital libraries such as the NASA Astrophysics Data System (Kurtz et al., 2005) permit the easy accumulation of a new type of bibliometric measure, the number of electronic accesses ("reads") of individual articles. We explore various aspects of this new measure. We examine the obsolescence function as measured by actual reads and show that it can be weIl fit by the sum of four exponentials with very different time constants. We compare the obsolescence function as measured by readership with the obsolescence function as measured by citations. We find that the citation function is proportional to the sum of two of the components of the readership function. This proves that the normative theory of citation is true in the mean. We further examine in detail the similarities and differences among the citation rate, the readership rate, and the total citations for individual articles, and discuss some of the causes. Using the number of reads as a bibliometric measure for individuals, we introduce the read-cite diagram to provide a two-dimensional view of an individual's scientific productivity. We develop a simple model to account for an individual's reads and cites and use it to show that the position of a person in the read-cite diagram is a function of age, innate productivity, and work history. We show the age biases of both reads and cites and develop two new bibliometric measures which have substantially less age blas than citations: SumProd, a weighted sum of total citations and the readership rate, intended to show the total productivity of an individual; and Read10, the readership rate for articles published in the last 10 years, intended to show an individual's current productivity. We also discuss the effect of normalization (dividing by the number of authors an a paper) an these statistics. We apply SumProd and Read10 using new, nonparametric techniques to compare the quality of different astronomical research organizations.

Theme

Informetrie

Similar documents (author)

1. Kurtz, M.J.; Eichhorn, G.; Accomazzi, A.; Grant, C.; Demleitner, M.; Murray, S.S.: Worldwide use and impact of the NASA Astrophysics Data System Digital Library (2005) 4.73

   4.7299147 = sum of:
     4.7299147 = sum of:
       1.037272 = weight(author_txt:murray in 4267) [ClassicSimilarity], result of:
         1.037272 = score(doc=4267,freq=1.0), product of:
           0.45783493 = queryWeight, product of:
             9.06241 = idf(docFreq=13, maxDocs=44421)
             0.050520215 = queryNorm
           2.2656026 = fieldWeight in 4267, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.06241 = idf(docFreq=13, maxDocs=44421)
             0.25 = fieldNorm(doc=4267)
       1.1571513 = weight(author_txt:grant in 4267) [ClassicSimilarity], result of:
         1.1571513 = score(doc=4267,freq=1.0), product of:
           0.49246335 = queryWeight, product of:
             1.0371283 = boost
             9.398883 = idf(docFreq=9, maxDocs=44421)
             0.050520215 = queryNorm
           2.3497207 = fieldWeight in 4267, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.398883 = idf(docFreq=9, maxDocs=44421)
             0.25 = fieldNorm(doc=4267)
       1.2415411 = weight(author_txt:kurtz in 4267) [ClassicSimilarity], result of:
         1.2415411 = score(doc=4267,freq=1.0), product of:
           0.5161246 = queryWeight, product of:
             1.0617514 = boost
             9.622026 = idf(docFreq=7, maxDocs=44421)
             0.050520215 = queryNorm
           2.4055066 = fieldWeight in 4267, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.622026 = idf(docFreq=7, maxDocs=44421)
             0.25 = fieldNorm(doc=4267)
       1.2939506 = weight(author_txt:eichhorn in 4267) [ClassicSimilarity], result of:
         1.2939506 = score(doc=4267,freq=1.0), product of:
           0.5305491 = queryWeight, product of:
             1.0764859 = boost
             9.755557 = idf(docFreq=6, maxDocs=44421)
             0.050520215 = queryNorm
           2.4388893 = fieldWeight in 4267, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.755557 = idf(docFreq=6, maxDocs=44421)
             0.25 = fieldNorm(doc=4267)
   

2. Kurtz, M.J.; Eichhorn, G.; Accomazzi, A.; Grant, C.; Demleitner, M.; Henneken, E.; Murray, S.S.: ¬The effect of use and access on citations (2005) 4.73

   4.7299147 = sum of:
     4.7299147 = sum of:
       1.037272 = weight(author_txt:murray in 2064) [ClassicSimilarity], result of:
         1.037272 = score(doc=2064,freq=1.0), product of:
           0.45783493 = queryWeight, product of:
             9.06241 = idf(docFreq=13, maxDocs=44421)
             0.050520215 = queryNorm
           2.2656026 = fieldWeight in 2064, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.06241 = idf(docFreq=13, maxDocs=44421)
             0.25 = fieldNorm(doc=2064)
       1.1571513 = weight(author_txt:grant in 2064) [ClassicSimilarity], result of:
         1.1571513 = score(doc=2064,freq=1.0), product of:
           0.49246335 = queryWeight, product of:
             1.0371283 = boost
             9.398883 = idf(docFreq=9, maxDocs=44421)
             0.050520215 = queryNorm
           2.3497207 = fieldWeight in 2064, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.398883 = idf(docFreq=9, maxDocs=44421)
             0.25 = fieldNorm(doc=2064)
       1.2415411 = weight(author_txt:kurtz in 2064) [ClassicSimilarity], result of:
         1.2415411 = score(doc=2064,freq=1.0), product of:
           0.5161246 = queryWeight, product of:
             1.0617514 = boost
             9.622026 = idf(docFreq=7, maxDocs=44421)
             0.050520215 = queryNorm
           2.4055066 = fieldWeight in 2064, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.622026 = idf(docFreq=7, maxDocs=44421)
             0.25 = fieldNorm(doc=2064)
       1.2939506 = weight(author_txt:eichhorn in 2064) [ClassicSimilarity], result of:
         1.2939506 = score(doc=2064,freq=1.0), product of:
           0.5305491 = queryWeight, product of:
             1.0764859 = boost
             9.755557 = idf(docFreq=6, maxDocs=44421)
             0.050520215 = queryNorm
           2.4388893 = fieldWeight in 2064, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.755557 = idf(docFreq=6, maxDocs=44421)
             0.25 = fieldNorm(doc=2064)
   

3. Eichhorn, S.: Auskunftsdienst auf neuen Wegen : CD-ROM in Öffentlichen Bibliothek (1996) 0.81

   0.8087191 = sum of:
     0.8087191 = product of:
       3.2348764 = sum of:
         3.2348764 = weight(author_txt:eichhorn in 4415) [ClassicSimilarity], result of:
           3.2348764 = score(doc=4415,freq=1.0), product of:
             0.5305491 = queryWeight, product of:
               1.0764859 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.050520215 = queryNorm
             6.0972233 = fieldWeight in 4415, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.625 = fieldNorm(doc=4415)
       0.25 = coord(1/4)
   

4. Eichhorn, M.: "Erleuchtet, einsam, unendlich, vollkommen ..." : Die Bibliothek und ihre Rolle im kulturellen Gedächtnis: Trouvaillen und Tendenzen (2001) 0.81

   0.8087191 = sum of:
     0.8087191 = product of:
       3.2348764 = sum of:
         3.2348764 = weight(author_txt:eichhorn in 602) [ClassicSimilarity], result of:
           3.2348764 = score(doc=602,freq=1.0), product of:
             0.5305491 = queryWeight, product of:
               1.0764859 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.050520215 = queryNorm
             6.0972233 = fieldWeight in 602, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.625 = fieldNorm(doc=602)
       0.25 = coord(1/4)
   

5. Kurtz, J.: Multicultural children's books : the subtle tug of war (1996) 0.78

   0.7759632 = sum of:
     0.7759632 = product of:
       3.1038527 = sum of:
         3.1038527 = weight(author_txt:kurtz in 4841) [ClassicSimilarity], result of:
           3.1038527 = score(doc=4841,freq=1.0), product of:
             0.5161246 = queryWeight, product of:
               1.0617514 = boost
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.050520215 = queryNorm
             6.0137663 = fieldWeight in 4841, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.625 = fieldNorm(doc=4841)
       0.25 = coord(1/4)
   

Similar documents (content)

1. Kurtz, M.J.; Eichhorn, G.; Accomazzi, A.; Grant, C.; Demleitner, M.; Murray, S.S.: Worldwide use and impact of the NASA Astrophysics Data System Digital Library (2005) 0.30

   0.30442873 = sum of:
     0.30442873 = product of:
       0.8456353 = sum of:
         0.02806626 = weight(abstract_txt:number in 4267) [ClassicSimilarity], result of:
           0.02806626 = score(doc=4267,freq=3.0), product of:
             0.0626899 = queryWeight, product of:
               1.181397 = boost
               4.1356745 = idf(docFreq=1930, maxDocs=44421)
               0.012830849 = queryNorm
             0.44769987 = fieldWeight in 4267, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1356745 = idf(docFreq=1930, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.042654574 = weight(abstract_txt:read in 4267) [ClassicSimilarity], result of:
           0.042654574 = score(doc=4267,freq=1.0), product of:
             0.10440668 = queryWeight, product of:
               1.2448457 = boost
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.012830849 = queryNorm
             0.4085426 = fieldWeight in 4267, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.025015928 = weight(abstract_txt:articles in 4267) [ClassicSimilarity], result of:
           0.025015928 = score(doc=4267,freq=1.0), product of:
             0.08373866 = queryWeight, product of:
               1.3654004 = boost
               4.7798095 = idf(docFreq=1013, maxDocs=44421)
               0.012830849 = queryNorm
             0.2987381 = fieldWeight in 4267, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7798095 = idf(docFreq=1013, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.026556939 = weight(abstract_txt:individual in 4267) [ClassicSimilarity], result of:
           0.026556939 = score(doc=4267,freq=1.0), product of:
             0.08714323 = queryWeight, product of:
               1.3928806 = boost
               4.8760076 = idf(docFreq=920, maxDocs=44421)
               0.012830849 = queryNorm
             0.30475047 = fieldWeight in 4267, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8760076 = idf(docFreq=920, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.026789889 = weight(abstract_txt:citation in 4267) [ClassicSimilarity], result of:
           0.026789889 = score(doc=4267,freq=1.0), product of:
             0.08765208 = queryWeight, product of:
               1.3969413 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012830849 = queryNorm
             0.30563894 = fieldWeight in 4267, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.05204489 = weight(abstract_txt:measure in 4267) [ClassicSimilarity], result of:
           0.05204489 = score(doc=4267,freq=2.0), product of:
             0.10831544 = queryWeight, product of:
               1.5528954 = boost
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.012830849 = queryNorm
             0.48049375 = fieldWeight in 4267, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.10136504 = weight(abstract_txt:bibliometric in 4267) [ClassicSimilarity], result of:
           0.10136504 = score(doc=4267,freq=2.0), product of:
             0.18592736 = queryWeight, product of:
               2.3492978 = boost
               6.168078 = idf(docFreq=252, maxDocs=44421)
               0.012830849 = queryNorm
             0.5451862 = fieldWeight in 4267, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.168078 = idf(docFreq=252, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.30745596 = weight(abstract_txt:reads in 4267) [ClassicSimilarity], result of:
           0.30745596 = score(doc=4267,freq=1.0), product of:
             0.52875334 = queryWeight, product of:
               4.4294314 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.012830849 = queryNorm
             0.5814733 = fieldWeight in 4267, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
         0.2356858 = weight(abstract_txt:readership in 4267) [ClassicSimilarity], result of:
           0.2356858 = score(doc=4267,freq=1.0), product of:
             0.47063103 = queryWeight, product of:
               4.5777526 = boost
               8.0125885 = idf(docFreq=39, maxDocs=44421)
               0.012830849 = queryNorm
             0.5007868 = fieldWeight in 4267, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.0125885 = idf(docFreq=39, maxDocs=44421)
               0.0625 = fieldNorm(doc=4267)
       0.36 = coord(9/25)
   

2. Mohammadi, E.; Thelwall, M.; Haustein, S.; Larivière, V.: Who reads research articles? : an altmetrics analysis of Mendeley user categories (2015) 0.26

   0.2560697 = sum of:
     0.2560697 = product of:
       0.91453457 = sum of:
         0.06032268 = weight(abstract_txt:read in 3162) [ClassicSimilarity], result of:
           0.06032268 = score(doc=3162,freq=2.0), product of:
             0.10440668 = queryWeight, product of:
               1.2448457 = boost
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.012830849 = queryNorm
             0.5777665 = fieldWeight in 3162, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
         0.07075573 = weight(abstract_txt:articles in 3162) [ClassicSimilarity], result of:
           0.07075573 = score(doc=3162,freq=8.0), product of:
             0.08373866 = queryWeight, product of:
               1.3654004 = boost
               4.7798095 = idf(docFreq=1013, maxDocs=44421)
               0.012830849 = queryNorm
             0.8449589 = fieldWeight in 3162, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.7798095 = idf(docFreq=1013, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
         0.037886623 = weight(abstract_txt:citation in 3162) [ClassicSimilarity], result of:
           0.037886623 = score(doc=3162,freq=2.0), product of:
             0.08765208 = queryWeight, product of:
               1.3969413 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012830849 = queryNorm
             0.43223873 = fieldWeight in 3162, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
         0.058513418 = weight(abstract_txt:measured in 3162) [ClassicSimilarity], result of:
           0.058513418 = score(doc=3162,freq=1.0), product of:
             0.14755432 = queryWeight, product of:
               1.8124791 = boost
               6.3448815 = idf(docFreq=211, maxDocs=44421)
               0.012830849 = queryNorm
             0.3965551 = fieldWeight in 3162, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.3448815 = idf(docFreq=211, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
         0.046290107 = weight(abstract_txt:citations in 3162) [ClassicSimilarity], result of:
           0.046290107 = score(doc=3162,freq=1.0), product of:
             0.13891633 = queryWeight, product of:
               2.0306873 = boost
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.012830849 = queryNorm
             0.33322293 = fieldWeight in 3162, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
         0.30745596 = weight(abstract_txt:reads in 3162) [ClassicSimilarity], result of:
           0.30745596 = score(doc=3162,freq=1.0), product of:
             0.52875334 = queryWeight, product of:
               4.4294314 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.012830849 = queryNorm
             0.5814733 = fieldWeight in 3162, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
         0.33331007 = weight(abstract_txt:readership in 3162) [ClassicSimilarity], result of:
           0.33331007 = score(doc=3162,freq=2.0), product of:
             0.47063103 = queryWeight, product of:
               4.5777526 = boost
               8.0125885 = idf(docFreq=39, maxDocs=44421)
               0.012830849 = queryNorm
             0.70821947 = fieldWeight in 3162, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.0125885 = idf(docFreq=39, maxDocs=44421)
               0.0625 = fieldNorm(doc=3162)
       0.28 = coord(7/25)
   

3. Mingers, J.; Burrell, Q.L.: Modeling citation behavior in Management Science journals (2006) 0.16

   0.15591373 = sum of:
     0.15591373 = product of:
       0.64964056 = sum of:
         0.033196174 = weight(abstract_txt:individual in 1994) [ClassicSimilarity], result of:
           0.033196174 = score(doc=1994,freq=1.0), product of:
             0.08714323 = queryWeight, product of:
               1.3928806 = boost
               4.8760076 = idf(docFreq=920, maxDocs=44421)
               0.012830849 = queryNorm
             0.38093808 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8760076 = idf(docFreq=920, maxDocs=44421)
               0.078125 = fieldNorm(doc=1994)
         0.04735828 = weight(abstract_txt:citation in 1994) [ClassicSimilarity], result of:
           0.04735828 = score(doc=1994,freq=2.0), product of:
             0.08765208 = queryWeight, product of:
               1.3969413 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012830849 = queryNorm
             0.5402984 = fieldWeight in 1994, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.078125 = fieldNorm(doc=1994)
         0.14173393 = weight(abstract_txt:citations in 1994) [ClassicSimilarity], result of:
           0.14173393 = score(doc=1994,freq=6.0), product of:
             0.13891633 = queryWeight, product of:
               2.0306873 = boost
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.012830849 = queryNorm
             1.0202827 = fieldWeight in 1994, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.078125 = fieldNorm(doc=1994)
         0.08775304 = weight(abstract_txt:rate in 1994) [ClassicSimilarity], result of:
           0.08775304 = score(doc=1994,freq=1.0), product of:
             0.18337043 = queryWeight, product of:
               2.3330877 = boost
               6.1255183 = idf(docFreq=263, maxDocs=44421)
               0.012830849 = queryNorm
             0.47855613 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.1255183 = idf(docFreq=263, maxDocs=44421)
               0.078125 = fieldNorm(doc=1994)
         0.2405032 = weight(abstract_txt:obsolescence in 1994) [ClassicSimilarity], result of:
           0.2405032 = score(doc=1994,freq=2.0), product of:
             0.25896764 = queryWeight, product of:
               2.4011528 = boost
               8.405631 = idf(docFreq=26, maxDocs=44421)
               0.012830849 = queryNorm
             0.92869985 = fieldWeight in 1994, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.405631 = idf(docFreq=26, maxDocs=44421)
               0.078125 = fieldNorm(doc=1994)
         0.09909591 = weight(abstract_txt:function in 1994) [ClassicSimilarity], result of:
           0.09909591 = score(doc=1994,freq=1.0), product of:
             0.2276261 = queryWeight, product of:
               3.1836336 = boost
               5.5724173 = idf(docFreq=458, maxDocs=44421)
               0.012830849 = queryNorm
             0.4353451 = fieldWeight in 1994, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5724173 = idf(docFreq=458, maxDocs=44421)
               0.078125 = fieldNorm(doc=1994)
       0.24 = coord(6/25)
   

4. Mohammadi , E.; Thelwall, M.: Mendeley readership altmetrics for the social sciences and humanities : research evaluation and knowledge flows (2014) 0.15

   0.14753327 = sum of:
     0.14753327 = product of:
       0.61472195 = sum of:
         0.026966138 = weight(abstract_txt:compare in 3190) [ClassicSimilarity], result of:
           0.026966138 = score(doc=3190,freq=1.0), product of:
             0.076906614 = queryWeight, product of:
               1.0683985 = boost
               5.6101575 = idf(docFreq=441, maxDocs=44421)
               0.012830849 = queryNorm
             0.35063484 = fieldWeight in 3190, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6101575 = idf(docFreq=441, maxDocs=44421)
               0.0625 = fieldNorm(doc=3190)
         0.042654574 = weight(abstract_txt:read in 3190) [ClassicSimilarity], result of:
           0.042654574 = score(doc=3190,freq=1.0), product of:
             0.10440668 = queryWeight, product of:
               1.2448457 = boost
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.012830849 = queryNorm
             0.4085426 = fieldWeight in 3190, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5366817 = idf(docFreq=174, maxDocs=44421)
               0.0625 = fieldNorm(doc=3190)
         0.025015928 = weight(abstract_txt:articles in 3190) [ClassicSimilarity], result of:
           0.025015928 = score(doc=3190,freq=1.0), product of:
             0.08373866 = queryWeight, product of:
               1.3654004 = boost
               4.7798095 = idf(docFreq=1013, maxDocs=44421)
               0.012830849 = queryNorm
             0.2987381 = fieldWeight in 3190, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7798095 = idf(docFreq=1013, maxDocs=44421)
               0.0625 = fieldNorm(doc=3190)
         0.04640145 = weight(abstract_txt:citation in 3190) [ClassicSimilarity], result of:
           0.04640145 = score(doc=3190,freq=3.0), product of:
             0.08765208 = queryWeight, product of:
               1.3969413 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012830849 = queryNorm
             0.52938217 = fieldWeight in 3190, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=3190)
         0.065464094 = weight(abstract_txt:citations in 3190) [ClassicSimilarity], result of:
           0.065464094 = score(doc=3190,freq=2.0), product of:
             0.13891633 = queryWeight, product of:
               2.0306873 = boost
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.012830849 = queryNorm
             0.47124836 = fieldWeight in 3190, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.0625 = fieldNorm(doc=3190)
         0.40821978 = weight(abstract_txt:readership in 3190) [ClassicSimilarity], result of:
           0.40821978 = score(doc=3190,freq=3.0), product of:
             0.47063103 = queryWeight, product of:
               4.5777526 = boost
               8.0125885 = idf(docFreq=39, maxDocs=44421)
               0.012830849 = queryNorm
             0.8673881 = fieldWeight in 3190, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.0125885 = idf(docFreq=39, maxDocs=44421)
               0.0625 = fieldNorm(doc=3190)
       0.24 = coord(6/25)
   

5. Moed, H.F.: Statistical relationships between downloads and citations at the level of individual documents within a single journal (2005) 0.15

   0.14583547 = sum of:
     0.14583547 = product of:
       0.45573586 = sum of:
         0.021049695 = weight(abstract_txt:number in 4882) [ClassicSimilarity], result of:
           0.021049695 = score(doc=4882,freq=3.0), product of:
             0.0626899 = queryWeight, product of:
               1.181397 = boost
               4.1356745 = idf(docFreq=1930, maxDocs=44421)
               0.012830849 = queryNorm
             0.3357749 = fieldWeight in 4882, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1356745 = idf(docFreq=1930, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.056829937 = weight(abstract_txt:citation in 4882) [ClassicSimilarity], result of:
           0.056829937 = score(doc=4882,freq=8.0), product of:
             0.08765208 = queryWeight, product of:
               1.3969413 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.012830849 = queryNorm
             0.6483581 = fieldWeight in 4882, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.02760097 = weight(abstract_txt:measure in 4882) [ClassicSimilarity], result of:
           0.02760097 = score(doc=4882,freq=1.0), product of:
             0.10831544 = queryWeight, product of:
               1.5528954 = boost
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.012830849 = queryNorm
             0.2548203 = fieldWeight in 4882, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4361663 = idf(docFreq=525, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.06943516 = weight(abstract_txt:citations in 4882) [ClassicSimilarity], result of:
           0.06943516 = score(doc=4882,freq=4.0), product of:
             0.13891633 = queryWeight, product of:
               2.0306873 = boost
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.012830849 = queryNorm
             0.4998344 = fieldWeight in 4882, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.331567 = idf(docFreq=583, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.024408858 = weight(abstract_txt:show in 4882) [ClassicSimilarity], result of:
           0.024408858 = score(doc=4882,freq=1.0), product of:
             0.118319236 = queryWeight, product of:
               2.095314 = boost
               4.400995 = idf(docFreq=1480, maxDocs=44421)
               0.012830849 = queryNorm
             0.20629662 = fieldWeight in 4882, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.400995 = idf(docFreq=1480, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.052651823 = weight(abstract_txt:rate in 4882) [ClassicSimilarity], result of:
           0.052651823 = score(doc=4882,freq=1.0), product of:
             0.18337043 = queryWeight, product of:
               2.3330877 = boost
               6.1255183 = idf(docFreq=263, maxDocs=44421)
               0.012830849 = queryNorm
             0.28713366 = fieldWeight in 4882, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.1255183 = idf(docFreq=263, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.1443019 = weight(abstract_txt:obsolescence in 4882) [ClassicSimilarity], result of:
           0.1443019 = score(doc=4882,freq=2.0), product of:
             0.25896764 = queryWeight, product of:
               2.4011528 = boost
               8.405631 = idf(docFreq=26, maxDocs=44421)
               0.012830849 = queryNorm
             0.55721986 = fieldWeight in 4882, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.405631 = idf(docFreq=26, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
         0.05945754 = weight(abstract_txt:function in 4882) [ClassicSimilarity], result of:
           0.05945754 = score(doc=4882,freq=1.0), product of:
             0.2276261 = queryWeight, product of:
               3.1836336 = boost
               5.5724173 = idf(docFreq=458, maxDocs=44421)
               0.012830849 = queryNorm
             0.26120704 = fieldWeight in 4882, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5724173 = idf(docFreq=458, maxDocs=44421)
               0.046875 = fieldNorm(doc=4882)
       0.32 = coord(8/25)