Document (#36971)

Author

Lin, N.
Li, D.
Ding, Y.
He, B.
Qin, Z.
Tang, J.
Li, J.
Dong, T.

Title

¬The dynamic features of Delicious, Flickr, and YouTube

Source

Journal of the American Society for Information Science and Technology. 63(2012) no.1, S.139-162

Year

2012

Abstract

This article investigates the dynamic features of social tagging vocabularies in Delicious, Flickr, and YouTube from 2003 to 2008. Three algorithms are designed to study the macro- and micro-tag growth as well as the dynamics of taggers' activities, respectively. Moreover, we propose a Tagger Tag Resource Latent Dirichlet Allocation (TTR-LDA) model to explore the evolution of topics emerging from those social vocabularies. Our results show that (a) at the macro level, tag growth in all the three tagging systems obeys power law distribution with exponents lower than 1; at the micro level, the tag growth of popular resources in all three tagging systems follows a similar power law distribution; (b) the exponents of tag growth vary in different evolving stages of resources; (c) the growth of number of taggers associated with different popular resources presents a feature of convergence over time; (d) the active level of taggers has a positive correlation with the macro-tag growth of different tagging systems; and (e) some topics evolve into several subtopics over time while others experience relatively stable stages in which their contents do not change much, and certain groups of taggers continue their interests in them.

Theme

Social tagging

Object

Delicious
Flickr
YouTube

Similar documents (author)

1. Li, D.; Ding, Y.; Sugimoto, C.; He, B.; Tang, J.; Yan, E.; Lin, N.; Qin, Z.; Dong, T.: Modeling topic and community structure in social tagging : the TTR-LDA-Community model (2011) 3.10

   3.0995865 = sum of:
     3.0995865 = sum of:
       0.8290744 = weight(author_txt:ding in 4759) [ClassicSimilarity], result of:
         0.8290744 = score(doc=4759,freq=1.0), product of:
           0.4963114 = queryWeight, product of:
             7.636444 = idf(docFreq=57, maxDocs=44218)
             0.06499247 = queryNorm
           1.6704721 = fieldWeight in 4759, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.636444 = idf(docFreq=57, maxDocs=44218)
             0.21875 = fieldNorm(doc=4759)
       0.9472612 = weight(author_txt:tang in 4759) [ClassicSimilarity], result of:
         0.9472612 = score(doc=4759,freq=1.0), product of:
           0.5424234 = queryWeight, product of:
             1.0454232 = boost
             7.983315 = idf(docFreq=40, maxDocs=44218)
             0.06499247 = queryNorm
           1.7463502 = fieldWeight in 4759, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.983315 = idf(docFreq=40, maxDocs=44218)
             0.21875 = fieldNorm(doc=4759)
       1.3232508 = weight(author_txt:dong in 4759) [ClassicSimilarity], result of:
         1.3232508 = score(doc=4759,freq=1.0), product of:
           0.6778288 = queryWeight, product of:
             1.1686457 = boost
             8.924298 = idf(docFreq=15, maxDocs=44218)
             0.06499247 = queryNorm
           1.9521903 = fieldWeight in 4759, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.924298 = idf(docFreq=15, maxDocs=44218)
             0.21875 = fieldNorm(doc=4759)
   

2. Cao, Q.; Lu, Y.; Dong, D.; Tang, Z.; Li, Y.: ¬The roles of bridging and bonding in social media communities (2013) 2.16

   2.1623924 = sum of:
     2.1623924 = product of:
       3.2435884 = sum of:
         1.3532304 = weight(author_txt:tang in 1009) [ClassicSimilarity], result of:
           1.3532304 = score(doc=1009,freq=1.0), product of:
             0.5424234 = queryWeight, product of:
               1.0454232 = boost
               7.983315 = idf(docFreq=40, maxDocs=44218)
               0.06499247 = queryNorm
             2.494786 = fieldWeight in 1009, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.983315 = idf(docFreq=40, maxDocs=44218)
               0.3125 = fieldNorm(doc=1009)
         1.8903582 = weight(author_txt:dong in 1009) [ClassicSimilarity], result of:
           1.8903582 = score(doc=1009,freq=1.0), product of:
             0.6778288 = queryWeight, product of:
               1.1686457 = boost
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06499247 = queryNorm
             2.7888432 = fieldWeight in 1009, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.3125 = fieldNorm(doc=1009)
       0.6666667 = coord(2/3)
   

3. Hu, B.; Dong, X.; Zhang, C.; Bowman, T.D.; Ding, Y.; Milojevic, S.; Ni, C.; Yan, E.; Larivière, V.: ¬A lead-lag analysis of the topic evolution patterns for preprints and publications (2015) 1.43

   1.4348835 = sum of:
     1.4348835 = product of:
       2.1523252 = sum of:
         0.8290744 = weight(author_txt:ding in 2337) [ClassicSimilarity], result of:
           0.8290744 = score(doc=2337,freq=1.0), product of:
             0.4963114 = queryWeight, product of:
               7.636444 = idf(docFreq=57, maxDocs=44218)
               0.06499247 = queryNorm
             1.6704721 = fieldWeight in 2337, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.636444 = idf(docFreq=57, maxDocs=44218)
               0.21875 = fieldNorm(doc=2337)
         1.3232508 = weight(author_txt:dong in 2337) [ClassicSimilarity], result of:
           1.3232508 = score(doc=2337,freq=1.0), product of:
             0.6778288 = queryWeight, product of:
               1.1686457 = boost
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06499247 = queryNorm
             1.9521903 = fieldWeight in 2337, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.21875 = fieldNorm(doc=2337)
       0.6666667 = coord(2/3)
   

4. Li, D.; Tang, J.; Ding, Y.; Shuai, X.; Chambers, T.; Sun, G.; Luo, Z.; Zhang, J.: Topic-level opinion influence model (TOIM) : an investigation using tencent microblogging (2015) 1.35

   1.3533987 = sum of:
     1.3533987 = product of:
       2.030098 = sum of:
         0.9475136 = weight(author_txt:ding in 2345) [ClassicSimilarity], result of:
           0.9475136 = score(doc=2345,freq=1.0), product of:
             0.4963114 = queryWeight, product of:
               7.636444 = idf(docFreq=57, maxDocs=44218)
               0.06499247 = queryNorm
             1.909111 = fieldWeight in 2345, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.636444 = idf(docFreq=57, maxDocs=44218)
               0.25 = fieldNorm(doc=2345)
         1.0825843 = weight(author_txt:tang in 2345) [ClassicSimilarity], result of:
           1.0825843 = score(doc=2345,freq=1.0), product of:
             0.5424234 = queryWeight, product of:
               1.0454232 = boost
               7.983315 = idf(docFreq=40, maxDocs=44218)
               0.06499247 = queryNorm
             1.9958287 = fieldWeight in 2345, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.983315 = idf(docFreq=40, maxDocs=44218)
               0.25 = fieldNorm(doc=2345)
       0.6666667 = coord(2/3)
   

5. Dong, E.X.: Organizing Websites : a dilemma for libraries (2004/05) 1.26

   1.2602389 = sum of:
     1.2602389 = product of:
       3.7807164 = sum of:
         3.7807164 = weight(author_txt:dong in 732) [ClassicSimilarity], result of:
           3.7807164 = score(doc=732,freq=1.0), product of:
             0.6778288 = queryWeight, product of:
               1.1686457 = boost
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.06499247 = queryNorm
             5.5776863 = fieldWeight in 732, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.924298 = idf(docFreq=15, maxDocs=44218)
               0.625 = fieldNorm(doc=732)
       0.33333334 = coord(1/3)
   

Similar documents (content)

1. Li, D.; Ding, Y.; Sugimoto, C.; He, B.; Tang, J.; Yan, E.; Lin, N.; Qin, Z.; Dong, T.: Modeling topic and community structure in social tagging : the TTR-LDA-Community model (2011) 0.29

   0.29385692 = sum of:
     0.29385692 = product of:
       0.9183029 = sum of:
         0.069922015 = weight(abstract_txt:tagger in 4759) [ClassicSimilarity], result of:
           0.069922015 = score(doc=4759,freq=1.0), product of:
             0.12857515 = queryWeight, product of:
               1.0249953 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.014416448 = queryNorm
             0.54382217 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.02793131 = weight(abstract_txt:topics in 4759) [ClassicSimilarity], result of:
           0.02793131 = score(doc=4759,freq=1.0), product of:
             0.08786555 = queryWeight, product of:
               1.1983058 = boost
               5.086191 = idf(docFreq=742, maxDocs=44218)
               0.014416448 = queryNorm
             0.31788695 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.086191 = idf(docFreq=742, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.017885463 = weight(abstract_txt:systems in 4759) [ClassicSimilarity], result of:
           0.017885463 = score(doc=4759,freq=2.0), product of:
             0.059307773 = queryWeight, product of:
               1.205757 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.014416448 = queryNorm
             0.3015703 = fieldWeight in 4759, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.023975618 = weight(abstract_txt:resources in 4759) [ClassicSimilarity], result of:
           0.023975618 = score(doc=4759,freq=1.0), product of:
             0.09084507 = queryWeight, product of:
               1.492295 = boost
               4.2226825 = idf(docFreq=1761, maxDocs=44218)
               0.014416448 = queryNorm
             0.26391765 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2226825 = idf(docFreq=1761, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.16165987 = weight(abstract_txt:delicious in 4759) [ClassicSimilarity], result of:
           0.16165987 = score(doc=4759,freq=1.0), product of:
             0.28324303 = queryWeight, product of:
               2.1514833 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.014416448 = queryNorm
             0.5707461 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.10655657 = weight(abstract_txt:tagging in 4759) [ClassicSimilarity], result of:
           0.10655657 = score(doc=4759,freq=1.0), product of:
             0.27028456 = queryWeight, product of:
               2.9722407 = boost
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.014416448 = queryNorm
             0.39423847 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.11483336 = weight(abstract_txt:growth in 4759) [ClassicSimilarity], result of:
           0.11483336 = score(doc=4759,freq=1.0), product of:
             0.32521972 = queryWeight, product of:
               3.9930747 = boost
               5.649515 = idf(docFreq=422, maxDocs=44218)
               0.014416448 = queryNorm
             0.3530947 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.649515 = idf(docFreq=422, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
         0.39553866 = weight(abstract_txt:taggers in 4759) [ClassicSimilarity], result of:
           0.39553866 = score(doc=4759,freq=2.0), product of:
             0.5143006 = queryWeight, product of:
               4.0999813 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.014416448 = queryNorm
             0.7690807 = fieldWeight in 4759, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.0625 = fieldNorm(doc=4759)
       0.32 = coord(8/25)
   

2. Ding, Y.; Jacob, E.K.; Zhang, Z.; Foo, S.; Yan, E.; George, N.L.; Guo, L.: Perspectives on social tagging (2009) 0.28

   0.2845643 = sum of:
     0.2845643 = product of:
       1.1856846 = sum of:
         0.019602653 = weight(abstract_txt:different in 3290) [ClassicSimilarity], result of:
           0.019602653 = score(doc=3290,freq=1.0), product of:
             0.06845283 = queryWeight, product of:
               1.2953875 = boost
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.014416448 = queryNorm
             0.28636733 = fieldWeight in 3290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.078125 = fieldNorm(doc=3290)
         0.12820089 = weight(abstract_txt:youtube in 3290) [ClassicSimilarity], result of:
           0.12820089 = score(doc=3290,freq=1.0), product of:
             0.2091278 = queryWeight, product of:
               1.8486907 = boost
               7.84674 = idf(docFreq=46, maxDocs=44218)
               0.014416448 = queryNorm
             0.61302656 = fieldWeight in 3290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.84674 = idf(docFreq=46, maxDocs=44218)
               0.078125 = fieldNorm(doc=3290)
         0.13379332 = weight(abstract_txt:flickr in 3290) [ClassicSimilarity], result of:
           0.13379332 = score(doc=3290,freq=1.0), product of:
             0.21516618 = queryWeight, product of:
               1.8751905 = boost
               7.9592175 = idf(docFreq=41, maxDocs=44218)
               0.014416448 = queryNorm
             0.6218139 = fieldWeight in 3290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.9592175 = idf(docFreq=41, maxDocs=44218)
               0.078125 = fieldNorm(doc=3290)
         0.20207483 = weight(abstract_txt:delicious in 3290) [ClassicSimilarity], result of:
           0.20207483 = score(doc=3290,freq=1.0), product of:
             0.28324303 = queryWeight, product of:
               2.1514833 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.014416448 = queryNorm
             0.71343267 = fieldWeight in 3290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.078125 = fieldNorm(doc=3290)
         0.35240275 = weight(abstract_txt:tagging in 3290) [ClassicSimilarity], result of:
           0.35240275 = score(doc=3290,freq=7.0), product of:
             0.27028456 = queryWeight, product of:
               2.9722407 = boost
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.014416448 = queryNorm
             1.3038212 = fieldWeight in 3290, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.078125 = fieldNorm(doc=3290)
         0.3496101 = weight(abstract_txt:taggers in 3290) [ClassicSimilarity], result of:
           0.3496101 = score(doc=3290,freq=1.0), product of:
             0.5143006 = queryWeight, product of:
               4.0999813 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.014416448 = queryNorm
             0.67977774 = fieldWeight in 3290, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.078125 = fieldNorm(doc=3290)
       0.24 = coord(6/25)
   

3. Ding, Y.; Jacob, E.K.; Fried, M.; Toma, I.; Yan, E.; Foo, S.; Milojevicacute, S.: Upper tag ontology for integrating social tagging data (2010) 0.27

   0.27260387 = sum of:
     0.27260387 = product of:
       0.8518871 = sum of:
         0.020290758 = weight(abstract_txt:over in 3421) [ClassicSimilarity], result of:
           0.020290758 = score(doc=3421,freq=1.0), product of:
             0.061190397 = queryWeight, product of:
               4.244485 = idf(docFreq=1723, maxDocs=44218)
               0.014416448 = queryNorm
             0.33160037 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.244485 = idf(docFreq=1723, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.015808664 = weight(abstract_txt:systems in 3421) [ClassicSimilarity], result of:
           0.015808664 = score(doc=3421,freq=1.0), product of:
             0.059307773 = queryWeight, product of:
               1.205757 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.014416448 = queryNorm
             0.26655298 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.019602653 = weight(abstract_txt:different in 3421) [ClassicSimilarity], result of:
           0.019602653 = score(doc=3421,freq=1.0), product of:
             0.06845283 = queryWeight, product of:
               1.2953875 = boost
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.014416448 = queryNorm
             0.28636733 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.034281347 = weight(abstract_txt:three in 3421) [ClassicSimilarity], result of:
           0.034281347 = score(doc=3421,freq=1.0), product of:
             0.09936194 = queryWeight, product of:
               1.5606806 = boost
               4.41619 = idf(docFreq=1451, maxDocs=44218)
               0.014416448 = queryNorm
             0.34501487 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.41619 = idf(docFreq=1451, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.12820089 = weight(abstract_txt:youtube in 3421) [ClassicSimilarity], result of:
           0.12820089 = score(doc=3421,freq=1.0), product of:
             0.2091278 = queryWeight, product of:
               1.8486907 = boost
               7.84674 = idf(docFreq=46, maxDocs=44218)
               0.014416448 = queryNorm
             0.61302656 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.84674 = idf(docFreq=46, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.13379332 = weight(abstract_txt:flickr in 3421) [ClassicSimilarity], result of:
           0.13379332 = score(doc=3421,freq=1.0), product of:
             0.21516618 = queryWeight, product of:
               1.8751905 = boost
               7.9592175 = idf(docFreq=41, maxDocs=44218)
               0.014416448 = queryNorm
             0.6218139 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.9592175 = idf(docFreq=41, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.20207483 = weight(abstract_txt:delicious in 3421) [ClassicSimilarity], result of:
           0.20207483 = score(doc=3421,freq=1.0), product of:
             0.28324303 = queryWeight, product of:
               2.1514833 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.014416448 = queryNorm
             0.71343267 = fieldWeight in 3421, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
         0.29783466 = weight(abstract_txt:tagging in 3421) [ClassicSimilarity], result of:
           0.29783466 = score(doc=3421,freq=5.0), product of:
             0.27028456 = queryWeight, product of:
               2.9722407 = boost
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.014416448 = queryNorm
             1.10193 = fieldWeight in 3421, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.078125 = fieldNorm(doc=3421)
       0.32 = coord(8/25)
   

4. Bentley, C.M.; Labelle, P.R.: ¬A comparison of social tagging designs and user participation (2008) 0.20

   0.19992313 = sum of:
     0.19992313 = product of:
       0.7140112 = sum of:
         0.016428845 = weight(abstract_txt:systems in 2657) [ClassicSimilarity], result of:
           0.016428845 = score(doc=2657,freq=3.0), product of:
             0.059307773 = queryWeight, product of:
               1.205757 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.014416448 = queryNorm
             0.27701 = fieldWeight in 2657, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
         0.011761593 = weight(abstract_txt:different in 2657) [ClassicSimilarity], result of:
           0.011761593 = score(doc=2657,freq=1.0), product of:
             0.06845283 = queryWeight, product of:
               1.2953875 = boost
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.014416448 = queryNorm
             0.1718204 = fieldWeight in 2657, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
         0.030711826 = weight(abstract_txt:popular in 2657) [ClassicSimilarity], result of:
           0.030711826 = score(doc=2657,freq=1.0), product of:
             0.11339328 = queryWeight, product of:
               1.3612943 = boost
               5.777993 = idf(docFreq=371, maxDocs=44218)
               0.014416448 = queryNorm
             0.27084345 = fieldWeight in 2657, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.777993 = idf(docFreq=371, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
         0.07692053 = weight(abstract_txt:youtube in 2657) [ClassicSimilarity], result of:
           0.07692053 = score(doc=2657,freq=1.0), product of:
             0.2091278 = queryWeight, product of:
               1.8486907 = boost
               7.84674 = idf(docFreq=46, maxDocs=44218)
               0.014416448 = queryNorm
             0.3678159 = fieldWeight in 2657, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.84674 = idf(docFreq=46, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
         0.08027599 = weight(abstract_txt:flickr in 2657) [ClassicSimilarity], result of:
           0.08027599 = score(doc=2657,freq=1.0), product of:
             0.21516618 = queryWeight, product of:
               1.8751905 = boost
               7.9592175 = idf(docFreq=41, maxDocs=44218)
               0.014416448 = queryNorm
             0.37308833 = fieldWeight in 2657, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.9592175 = idf(docFreq=41, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
         0.2881464 = weight(abstract_txt:tagging in 2657) [ClassicSimilarity], result of:
           0.2881464 = score(doc=2657,freq=13.0), product of:
             0.27028456 = queryWeight, product of:
               2.9722407 = boost
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.014416448 = queryNorm
             1.0660853 = fieldWeight in 2657, product of:
               3.6055512 = tf(freq=13.0), with freq of:
                 13.0 = termFreq=13.0
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
         0.20976605 = weight(abstract_txt:taggers in 2657) [ClassicSimilarity], result of:
           0.20976605 = score(doc=2657,freq=1.0), product of:
             0.5143006 = queryWeight, product of:
               4.0999813 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.014416448 = queryNorm
             0.40786663 = fieldWeight in 2657, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.046875 = fieldNorm(doc=2657)
       0.28 = coord(7/25)
   

5. Yi, K.; Chan, L.M.: Linking folksonomy to Library of Congress subject headings : an exploratory study (2009) 0.20

   0.19888106 = sum of:
     0.19888106 = product of:
       0.5524474 = sum of:
         0.020086825 = weight(abstract_txt:over in 3616) [ClassicSimilarity], result of:
           0.020086825 = score(doc=3616,freq=2.0), product of:
             0.061190397 = queryWeight, product of:
               4.244485 = idf(docFreq=1723, maxDocs=44218)
               0.014416448 = queryNorm
             0.3282676 = fieldWeight in 3616, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.244485 = idf(docFreq=1723, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.011066065 = weight(abstract_txt:systems in 3616) [ClassicSimilarity], result of:
           0.011066065 = score(doc=3616,freq=1.0), product of:
             0.059307773 = queryWeight, product of:
               1.205757 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.014416448 = queryNorm
             0.1865871 = fieldWeight in 3616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.046047043 = weight(abstract_txt:distribution in 3616) [ClassicSimilarity], result of:
           0.046047043 = score(doc=3616,freq=2.0), product of:
             0.106384136 = queryWeight, product of:
               1.3185506 = boost
               5.596568 = idf(docFreq=445, maxDocs=44218)
               0.014416448 = queryNorm
             0.4328375 = fieldWeight in 3616, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.596568 = idf(docFreq=445, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.035830464 = weight(abstract_txt:popular in 3616) [ClassicSimilarity], result of:
           0.035830464 = score(doc=3616,freq=1.0), product of:
             0.11339328 = queryWeight, product of:
               1.3612943 = boost
               5.777993 = idf(docFreq=371, maxDocs=44218)
               0.014416448 = queryNorm
             0.315984 = fieldWeight in 3616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.777993 = idf(docFreq=371, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.06651496 = weight(abstract_txt:vocabularies in 3616) [ClassicSimilarity], result of:
           0.06651496 = score(doc=3616,freq=3.0), product of:
             0.11875672 = queryWeight, product of:
               1.3931166 = boost
               5.913062 = idf(docFreq=324, maxDocs=44218)
               0.014416448 = queryNorm
             0.5600943 = fieldWeight in 3616, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.913062 = idf(docFreq=324, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.020978665 = weight(abstract_txt:resources in 3616) [ClassicSimilarity], result of:
           0.020978665 = score(doc=3616,freq=1.0), product of:
             0.09084507 = queryWeight, product of:
               1.492295 = boost
               4.2226825 = idf(docFreq=1761, maxDocs=44218)
               0.014416448 = queryNorm
             0.23092794 = fieldWeight in 3616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2226825 = idf(docFreq=1761, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.023996942 = weight(abstract_txt:three in 3616) [ClassicSimilarity], result of:
           0.023996942 = score(doc=3616,freq=1.0), product of:
             0.09936194 = queryWeight, product of:
               1.5606806 = boost
               4.41619 = idf(docFreq=1451, maxDocs=44218)
               0.014416448 = queryNorm
             0.24151039 = fieldWeight in 3616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.41619 = idf(docFreq=1451, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.14145237 = weight(abstract_txt:delicious in 3616) [ClassicSimilarity], result of:
           0.14145237 = score(doc=3616,freq=1.0), product of:
             0.28324303 = queryWeight, product of:
               2.1514833 = boost
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.014416448 = queryNorm
             0.49940285 = fieldWeight in 3616, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.131938 = idf(docFreq=12, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
         0.18647401 = weight(abstract_txt:tagging in 3616) [ClassicSimilarity], result of:
           0.18647401 = score(doc=3616,freq=4.0), product of:
             0.27028456 = queryWeight, product of:
               2.9722407 = boost
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.014416448 = queryNorm
             0.6899173 = fieldWeight in 3616, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.3078156 = idf(docFreq=218, maxDocs=44218)
               0.0546875 = fieldNorm(doc=3616)
       0.36 = coord(9/25)