Wikipedia

               ○

2009   11 22
                   1
7000.00




6000.00




5000.00




4000.00




3000.00




2000.00




1000.00




     0
          1

              2
✤   Wikipedia

    ✤



    ✤



✤



    ✤



    ✤




                3
Credibility Degree   0.4




                           4
Wikipedia




            5
Wikipedia




            5
Adler et al. WikiSym ’08, WWW 2007

                          ✤


               Author A


                              ...
Lifetime

 50
                               =            OK
37.5

                           =               NG
 25


12....
✤
                                   60    =1       =167       =7   =1

    ✤        Wikipedia      : 60

        ✤       ...
✤                                 (kBytes)
                          3,000


                          2,250
    ✤   80%  ...
✤




✤



                                                                 10       (x 1000 editors)

✤
                 ...
1.

2.

3.

4.




     11
1.

2.

3.

4.




     ?
         12
1.

2.

3.

4.   =       x -log




         ?
                      13
1


                                          0.9


                                          0.8
                        ...
✤




    ✤




    ✤




✤




    ✤




    ✤

        15
✤




    ✤                Wikipedia

        ✤   85,028               13.6%)   705,713         (Bot   )

✤




    ✤     ...
1,000,000


                         900,000


                         800,000


                         700,000
Calcula...
10


                           9


                           8    40%
                           7                      ...
✤



    ✤



✤



    ✤           2%

    ✤



        ✤



            ✤

                     19
✤




    ✤




    ✤




✤




    ✤




    ✤

        20
21
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Wikimedia Conference 2009 presentation

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  • Wikimedia Conference 2009 presentation

    1. 1. Wikipedia ○ 2009 11 22 1
    2. 2. 7000.00 6000.00 5000.00 4000.00 3000.00 2000.00 1000.00 0 1 2
    3. 3. ✤ Wikipedia ✤ ✤ ✤ ✤ ✤ 3
    4. 4. Credibility Degree 0.4 4
    5. 5. Wikipedia 5
    6. 6. Wikipedia 5
    7. 7. Adler et al. WikiSym ’08, WWW 2007 ✤ Author A ✤ Author B ✤ Author C Lifetime = lifetime 6
    8. 8. Lifetime 50 = OK 37.5 = NG 25 12.5 0 1 2 3 4 5 6 7 8 9 10 7
    9. 9. ✤ 60 =1 =167 =7 =1 ✤ Wikipedia : 60 ✤ 950,548 , 300 GB ✤ Wikipedian : 70 ✤ : 1 11,625 8
    10. 10. ✤ (kBytes) 3,000 2,250 ✤ 80% 20% (Ziph ) 1,500 ✤ 20% 750 80% 0 ID 9
    11. 11. ✤ ✤ 10 (x 1000 editors) ✤ 9 8 7 ✤ Number of Editors 6 Adler Uncredible editors 5 4 Credible editors 3 2 1 0 -10 -8 -6 -4 -2 0 2 4 6 8 10 (degrees) Reliability Degree ? 10
    12. 12. 1. 2. 3. 4. 11
    13. 13. 1. 2. 3. 4. ? 12
    14. 14. 1. 2. 3. 4. = x -log ? 13
    15. 15. 1 0.9 0.8 1 a 2 b Spearman's rank correlation coefficient 0.7 3 c 4 d 0.6 5 e 0.5 0.4 Amount of description 0.3 Number of articles 0.2 0.1 Amount of desciption and Number of articles 1 b 0 2 c 0 10 20 30 40 50 60 70 80 90 100 3 a 4 e Reduction ratio of editors (%) 5 d 14
    16. 16. ✤ ✤ ✤ ✤ ✤ ✤ 15
    17. 17. ✤ ✤ Wikipedia ✤ 85,028 13.6%) 705,713 (Bot ) ✤ ✤ 98 443 ) 16
    18. 18. 1,000,000 900,000 800,000 700,000 Calculation time (ms) 600,000 500,000 400,000 Amount of description 300,000 Number of articles 200,000 Amount of description and 100,000 number of articles 0 0 10 20 30 40 50 60 70 80 90 100 Decreasing ratio of editors (%) 17
    19. 19. 10 9 8 40% 7 Amount of description Averaging Increaced Rank and number of articles 6 Amount of description 5 4 3 2 Number of articles 1 0 Important Editor Identification Method 18
    20. 20. ✤ ✤ ✤ ✤ 2% ✤ ✤ ✤ 19
    21. 21. ✤ ✤ ✤ ✤ ✤ ✤ 20
    22. 22. 21

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