Document (#39132)

Author
Wu, I.-C.
Niu, Y.-F.
Title
Effects of anchoring process under preference stabilities for interactive movie recommendations
Source
Journal of the Association for Information Science and Technology. 66(2015) no.8, S.1673-1695
Year
2015
Abstract
This study explores how the stability of users' preferences influences recommendation results and how this stability relates to the effectiveness of developing recommendation strategies. In this work, we propose an anchor-based hybrid filtering approach (AHF) to naturally measure and capture the user's preference stabilities for movie genres. That is, a pairwise preference of the genre comparison process with the genre-based fuzzy inference filtering was conducted in order to achieve effective interactive recommendations. To conduct this experiment, we recruited 30 users with different levels of preference stability for movie genres. The experimental results show that the proposed AHF approach can effectively capture the user's preferences and filter out undesired movie genres. In addition, this approach can give a more precise recommendation than one without the anchoring process, especially for the user who has unstable preferences for movie genres. Our proposed approach achieves statistical significance and outperforms the baseline method for recommending users' favorite movies by more than 63% for the stable user group and 77% for the unstable group. The results suggest that the stability of users' preferences is a factor to be considered when developing effective recommendation strategies.
Content
Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23280/abstract.
Form
Filme

Similar documents (content)

  1. Kannan, R.; Ghinea, G.; Swaminathan, S.: What do you wish to see? : A summarization system for movies based on user preferences (2015) 0.38
    0.3781561 = sum of:
      0.3781561 = product of:
        1.1817378 = sum of:
          0.035592284 = weight(abstract_txt:proposed in 4148) [ClassicSimilarity], result of:
            0.035592284 = score(doc=4148,freq=5.0), product of:
              0.062912084 = queryWeight, product of:
                4.6264586 = idf(docFreq=1150, maxDocs=43254)
                0.013598325 = queryNorm
              0.56574637 = fieldWeight in 4148, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.6264586 = idf(docFreq=1150, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.0103438655 = weight(abstract_txt:results in 4148) [ClassicSimilarity], result of:
            0.0103438655 = score(doc=4148,freq=1.0), product of:
              0.054030526 = queryWeight, product of:
                1.1350061 = boost
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.013598325 = queryNorm
              0.19144484 = fieldWeight in 4148, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.031498447 = weight(abstract_txt:user's in 4148) [ClassicSimilarity], result of:
            0.031498447 = score(doc=4148,freq=1.0), product of:
              0.09916223 = queryWeight, product of:
                1.2554693 = boost
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.013598325 = queryNorm
              0.3176456 = fieldWeight in 4148, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.008169198 = weight(abstract_txt:this in 4148) [ClassicSimilarity], result of:
            0.008169198 = score(doc=4148,freq=2.0), product of:
              0.043442 = queryWeight, product of:
                1.3138865 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.013598325 = queryNorm
              0.18804839 = fieldWeight in 4148, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.014636313 = weight(abstract_txt:users in 4148) [ClassicSimilarity], result of:
            0.014636313 = score(doc=4148,freq=1.0), product of:
              0.074952245 = queryWeight, product of:
                1.5436195 = boost
                3.570746 = idf(docFreq=3307, maxDocs=43254)
                0.013598325 = queryNorm
              0.19527517 = fieldWeight in 4148, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.570746 = idf(docFreq=3307, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.017032577 = weight(abstract_txt:approach in 4148) [ClassicSimilarity], result of:
            0.017032577 = score(doc=4148,freq=1.0), product of:
              0.08292467 = queryWeight, product of:
                1.6236403 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.013598325 = queryNorm
              0.20539819 = fieldWeight in 4148, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.21212219 = weight(abstract_txt:preferences in 4148) [ClassicSimilarity], result of:
            0.21212219 = score(doc=4148,freq=5.0), product of:
              0.2605539 = queryWeight, product of:
                2.8780394 = boost
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.013598325 = queryNorm
              0.8141202 = fieldWeight in 4148, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
          0.8523429 = weight(abstract_txt:movie in 4148) [ClassicSimilarity], result of:
            0.8523429 = score(doc=4148,freq=13.0), product of:
              0.5158958 = queryWeight, product of:
                4.5277658 = boost
                8.379008 = idf(docFreq=26, maxDocs=43254)
                0.013598325 = queryNorm
              1.652161 = fieldWeight in 4148, product of:
                3.6055512 = tf(freq=13.0), with freq of:
                  13.0 = termFreq=13.0
                8.379008 = idf(docFreq=26, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4148)
        0.32 = coord(8/25)
    
  2. Tommasel, A.; Godoy, D.: Learning and adapting user criteria for recommending followees in social networks (2017) 0.21
    0.21086788 = sum of:
      0.21086788 = product of:
        0.65896213 = sum of:
          0.032157905 = weight(abstract_txt:proposed in 5210) [ClassicSimilarity], result of:
            0.032157905 = score(doc=5210,freq=2.0), product of:
              0.062912084 = queryWeight, product of:
                4.6264586 = idf(docFreq=1150, maxDocs=43254)
                0.013598325 = queryNorm
              0.51115626 = fieldWeight in 5210, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.6264586 = idf(docFreq=1150, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.04412643 = weight(abstract_txt:strategies in 5210) [ClassicSimilarity], result of:
            0.04412643 = score(doc=5210,freq=2.0), product of:
              0.07768576 = queryWeight, product of:
                1.1112292 = boost
                5.141056 = idf(docFreq=687, maxDocs=43254)
                0.013598325 = queryNorm
              0.5680118 = fieldWeight in 5210, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.141056 = idf(docFreq=687, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.014776951 = weight(abstract_txt:results in 5210) [ClassicSimilarity], result of:
            0.014776951 = score(doc=5210,freq=1.0), product of:
              0.054030526 = queryWeight, product of:
                1.1350061 = boost
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.013598325 = queryNorm
              0.27349263 = fieldWeight in 5210, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.044351663 = weight(abstract_txt:recommendations in 5210) [ClassicSimilarity], result of:
            0.044351663 = score(doc=5210,freq=1.0), product of:
              0.09821071 = queryWeight, product of:
                1.2494313 = boost
                5.780442 = idf(docFreq=362, maxDocs=43254)
                0.013598325 = queryNorm
              0.45159703 = fieldWeight in 5210, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.780442 = idf(docFreq=362, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.044997778 = weight(abstract_txt:user's in 5210) [ClassicSimilarity], result of:
            0.044997778 = score(doc=5210,freq=1.0), product of:
              0.09916223 = queryWeight, product of:
                1.2554693 = boost
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.013598325 = queryNorm
              0.45377943 = fieldWeight in 5210, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.008252136 = weight(abstract_txt:this in 5210) [ClassicSimilarity], result of:
            0.008252136 = score(doc=5210,freq=1.0), product of:
              0.043442 = queryWeight, product of:
                1.3138865 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.013598325 = queryNorm
              0.18995756 = fieldWeight in 5210, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.23472732 = weight(abstract_txt:preferences in 5210) [ClassicSimilarity], result of:
            0.23472732 = score(doc=5210,freq=3.0), product of:
              0.2605539 = queryWeight, product of:
                2.8780394 = boost
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.013598325 = queryNorm
              0.9008782 = fieldWeight in 5210, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
          0.23557194 = weight(abstract_txt:recommendation in 5210) [ClassicSimilarity], result of:
            0.23557194 = score(doc=5210,freq=2.0), product of:
              0.2989748 = queryWeight, product of:
                3.0829413 = boost
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.013598325 = queryNorm
              0.7879324 = fieldWeight in 5210, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.078125 = fieldNorm(doc=5210)
        0.32 = coord(8/25)
    
  3. Orso, V.; Ruotsalo, T.; Leino, J.; Gamberini, L.; Jacucci, G.: Overlaying social information : the effects on users' search and information-selection behavior (2017) 0.20
    0.19940515 = sum of:
      0.19940515 = product of:
        0.55390316 = sum of:
          0.015917353 = weight(abstract_txt:proposed in 98) [ClassicSimilarity], result of:
            0.015917353 = score(doc=98,freq=1.0), product of:
              0.062912084 = queryWeight, product of:
                4.6264586 = idf(docFreq=1150, maxDocs=43254)
                0.013598325 = queryNorm
              0.25300947 = fieldWeight in 98, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6264586 = idf(docFreq=1150, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.0103438655 = weight(abstract_txt:results in 98) [ClassicSimilarity], result of:
            0.0103438655 = score(doc=98,freq=1.0), product of:
              0.054030526 = queryWeight, product of:
                1.1350061 = boost
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.013598325 = queryNorm
              0.19144484 = fieldWeight in 98, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.055028252 = weight(abstract_txt:interactive in 98) [ClassicSimilarity], result of:
            0.055028252 = score(doc=98,freq=4.0), product of:
              0.09061304 = queryWeight, product of:
                1.20013 = boost
                5.552352 = idf(docFreq=455, maxDocs=43254)
                0.013598325 = queryNorm
              0.6072885 = fieldWeight in 98, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.552352 = idf(docFreq=455, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.031498447 = weight(abstract_txt:user's in 98) [ClassicSimilarity], result of:
            0.031498447 = score(doc=98,freq=1.0), product of:
              0.09916223 = queryWeight, product of:
                1.2554693 = boost
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.013598325 = queryNorm
              0.3176456 = fieldWeight in 98, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.016183581 = weight(abstract_txt:process in 98) [ClassicSimilarity], result of:
            0.016183581 = score(doc=98,freq=1.0), product of:
              0.072817154 = queryWeight, product of:
                1.317636 = boost
                4.063992 = idf(docFreq=2019, maxDocs=43254)
                0.013598325 = queryNorm
              0.22224957 = fieldWeight in 98, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.063992 = idf(docFreq=2019, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.044822805 = weight(abstract_txt:filtering in 98) [ClassicSimilarity], result of:
            0.044822805 = score(doc=98,freq=1.0), product of:
              0.12545449 = queryWeight, product of:
                1.4121344 = boost
                6.5331817 = idf(docFreq=170, maxDocs=43254)
                0.013598325 = queryNorm
              0.35728338 = fieldWeight in 98, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5331817 = idf(docFreq=170, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.02069887 = weight(abstract_txt:users in 98) [ClassicSimilarity], result of:
            0.02069887 = score(doc=98,freq=2.0), product of:
              0.074952245 = queryWeight, product of:
                1.5436195 = boost
                3.570746 = idf(docFreq=3307, maxDocs=43254)
                0.013598325 = queryNorm
              0.27616078 = fieldWeight in 98, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.570746 = idf(docFreq=3307, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.16430911 = weight(abstract_txt:preferences in 98) [ClassicSimilarity], result of:
            0.16430911 = score(doc=98,freq=3.0), product of:
              0.2605539 = queryWeight, product of:
                2.8780394 = boost
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.013598325 = queryNorm
              0.6306147 = fieldWeight in 98, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
          0.19510086 = weight(abstract_txt:preference in 98) [ClassicSimilarity], result of:
            0.19510086 = score(doc=98,freq=3.0), product of:
              0.2921657 = queryWeight, product of:
                3.0476322 = boost
                7.0498724 = idf(docFreq=101, maxDocs=43254)
                0.013598325 = queryNorm
              0.6677747 = fieldWeight in 98, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                7.0498724 = idf(docFreq=101, maxDocs=43254)
                0.0546875 = fieldNorm(doc=98)
        0.36 = coord(9/25)
    
  4. Mirizzi, R.; Ragone, A.; Noia, T. Di; Sciascio, E. Di: ¬A recommender system for linked data (2012) 0.18
    0.18139775 = sum of:
      0.18139775 = product of:
        0.75582397 = sum of:
          0.008169198 = weight(abstract_txt:this in 1901) [ClassicSimilarity], result of:
            0.008169198 = score(doc=1901,freq=2.0), product of:
              0.043442 = queryWeight, product of:
                1.3138865 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.013598325 = queryNorm
              0.18804839 = fieldWeight in 1901, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.0546875 = fieldNorm(doc=1901)
          0.048757587 = weight(abstract_txt:genre in 1901) [ClassicSimilarity], result of:
            0.048757587 = score(doc=1901,freq=1.0), product of:
              0.1326931 = queryWeight, product of:
                1.4523026 = boost
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.013598325 = queryNorm
              0.3674463 = fieldWeight in 1901, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.719018 = idf(docFreq=141, maxDocs=43254)
                0.0546875 = fieldNorm(doc=1901)
          0.014636313 = weight(abstract_txt:users in 1901) [ClassicSimilarity], result of:
            0.014636313 = score(doc=1901,freq=1.0), product of:
              0.074952245 = queryWeight, product of:
                1.5436195 = boost
                3.570746 = idf(docFreq=3307, maxDocs=43254)
                0.013598325 = queryNorm
              0.19527517 = fieldWeight in 1901, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.570746 = idf(docFreq=3307, maxDocs=43254)
                0.0546875 = fieldNorm(doc=1901)
          0.09486392 = weight(abstract_txt:preferences in 1901) [ClassicSimilarity], result of:
            0.09486392 = score(doc=1901,freq=1.0), product of:
              0.2605539 = queryWeight, product of:
                2.8780394 = boost
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.013598325 = queryNorm
              0.36408558 = fieldWeight in 1901, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.0546875 = fieldNorm(doc=1901)
          0.11660217 = weight(abstract_txt:recommendation in 1901) [ClassicSimilarity], result of:
            0.11660217 = score(doc=1901,freq=1.0), product of:
              0.2989748 = queryWeight, product of:
                3.0829413 = boost
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.013598325 = queryNorm
              0.39000666 = fieldWeight in 1901, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.0546875 = fieldNorm(doc=1901)
          0.47279477 = weight(abstract_txt:movie in 1901) [ClassicSimilarity], result of:
            0.47279477 = score(doc=1901,freq=4.0), product of:
              0.5158958 = queryWeight, product of:
                4.5277658 = boost
                8.379008 = idf(docFreq=26, maxDocs=43254)
                0.013598325 = queryNorm
              0.916454 = fieldWeight in 1901, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                8.379008 = idf(docFreq=26, maxDocs=43254)
                0.0546875 = fieldNorm(doc=1901)
        0.24 = coord(6/25)
    
  5. Lim, J.; Kang, S.; Kim, M.: Automatic user preference learning for personalized electronic program guide applications (2007) 0.18
    0.17665495 = sum of:
      0.17665495 = product of:
        0.7360623 = sum of:
          0.020897765 = weight(abstract_txt:results in 2477) [ClassicSimilarity], result of:
            0.020897765 = score(doc=2477,freq=2.0), product of:
              0.054030526 = queryWeight, product of:
                1.1350061 = boost
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.013598325 = queryNorm
              0.38677698 = fieldWeight in 2477, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5007057 = idf(docFreq=3547, maxDocs=43254)
                0.078125 = fieldNorm(doc=2477)
          0.044997778 = weight(abstract_txt:user's in 2477) [ClassicSimilarity], result of:
            0.044997778 = score(doc=2477,freq=1.0), product of:
              0.09916223 = queryWeight, product of:
                1.2554693 = boost
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.013598325 = queryNorm
              0.45377943 = fieldWeight in 2477, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.808377 = idf(docFreq=352, maxDocs=43254)
                0.078125 = fieldNorm(doc=2477)
          0.008252136 = weight(abstract_txt:this in 2477) [ClassicSimilarity], result of:
            0.008252136 = score(doc=2477,freq=1.0), product of:
              0.043442 = queryWeight, product of:
                1.3138865 = boost
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.013598325 = queryNorm
              0.18995756 = fieldWeight in 2477, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4314568 = idf(docFreq=10335, maxDocs=43254)
                0.078125 = fieldNorm(doc=2477)
          0.13551989 = weight(abstract_txt:preferences in 2477) [ClassicSimilarity], result of:
            0.13551989 = score(doc=2477,freq=1.0), product of:
              0.2605539 = queryWeight, product of:
                2.8780394 = boost
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.013598325 = queryNorm
              0.5201223 = fieldWeight in 2477, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.657565 = idf(docFreq=150, maxDocs=43254)
                0.078125 = fieldNorm(doc=2477)
          0.3598202 = weight(abstract_txt:preference in 2477) [ClassicSimilarity], result of:
            0.3598202 = score(doc=2477,freq=5.0), product of:
              0.2921657 = queryWeight, product of:
                3.0476322 = boost
                7.0498724 = idf(docFreq=101, maxDocs=43254)
                0.013598325 = queryNorm
              1.231562 = fieldWeight in 2477, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                7.0498724 = idf(docFreq=101, maxDocs=43254)
                0.078125 = fieldNorm(doc=2477)
          0.16657454 = weight(abstract_txt:recommendation in 2477) [ClassicSimilarity], result of:
            0.16657454 = score(doc=2477,freq=1.0), product of:
              0.2989748 = queryWeight, product of:
                3.0829413 = boost
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.013598325 = queryNorm
              0.5571524 = fieldWeight in 2477, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.078125 = fieldNorm(doc=2477)
        0.24 = coord(6/25)