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Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
Youtube  Presentation
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Youtube Presentation

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  • 1. Min Hu Rebecca Yu Nayeoung Kim 06/02/09 SI 508 Networks
  • 2.
    • Three Questions
      • How do numbers of videos uploaded by users affect the number of subscriber each user has?
      • Do numbers of videos uploaded by users follow power law?
      • Do people have the same interests as others if they are in the same community?
    06/02/09 SI 508 Networks
  • 3.
    • Picking 10 categories on Youtube
      • Autos & Vehicles, Comedy, Entertainment, Film & Animation, People & Blogs, Music, News & Politics, Pets & Animals, Sports, and Travel & Events
    • Look at one community from each Category. (Based on geography location, number of members, common interest, etc)
      • Number of Videos a User Uploaded
      • Number of Subscribers a User Have
      • Users to Subscriber Network
      • Number of Friends a User Have
      • User to Friend Network
      • Individual and Overall Interest for Videos in Different Categories.
    06/02/09 SI 508 Networks
  • 4.
    • Correlation Coefficient: 0.312451
    • But
    06/02/09 SI 508 Networks
  • 5.
    • More videos, increasing number of users with a higher number of subscribers
    06/02/09 SI 508 Networks
  • 6.
    • Correlation Coefficient: 0.550248
    06/02/09 SI 508 Networks
  • 7.
    • More subscribers, increasing number of friends
    06/02/09 SI 508 Networks
  • 8.
    • Many Videos Uploaded by Few Users
    06/02/09 SI 508 Networks
  • 9.
    • Most Videos are Uploaded by Few Users
    06/02/09 SI 508 Networks
  • 10.
    • Most Subscribers Subscribing to Few Users
    06/02/09 SI 508 Networks
  • 11.
    • Most Subscribers Subscribing to Few Users
    06/02/09 SI 508 Networks
  • 12.
    • Most People are Friends to Few Users
    06/02/09 SI 508 Networks
  • 13.
    • Most Videos Uploaded by Few Users
    06/02/09 SI 508 Networks
  • 14.
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • 15.
    • Low CC
    • Avg. shortest path is around 3.5-5.5(exclude unreachable pairs)
    06/02/09 SI 508 Networks
  • 16.
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • 17. # of Vertices: 658
  • 18.
    • Lower CC
    • Avg. shortest path is around 3.2-4.5(exclude unreachable pairs)
  • 19.
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • 20. # of Vertices: 723
  • 21. # of Vertices: 4165
  • 22.
    • The Clustering Coefficient of the network of member's friends in music group increase from 0.07 to 0.76
  • 23.
    • Low CC
    • Avg. shortest path is around 3.5-5.5(exclude unreachable pairs)
    06/02/09 SI 508 Networks
  • 24.
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • 25. # of Vertices: 658
  • 26.
    • Lower CC
    • Avg. shortest path is around 3.2-4.5(exclude unreachable pairs)
  • 27.
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • 28. # of Vertices: 723
  • 29. # of Vertices: 4165
  • 30.
    • The Clustering Coefficient of friend network for music group increase from 0.07 to 0.76
  • 31.
    • The most popular categories overall are Entertainment and Music
    • If exclude these two categories, users are most interested in the category of their own community
    06/02/09 SI 508 Networks
  • 32. 06/02/09 SI 508 Networks
  • 33. Pets & Animals 41.4% News & Politics 68.7% People & Blogs 12.3% Travel & Events 12.2% Sports 67.2% Comedy 67.2% Film & Animation 85.5% Auto & Vehicles 85.5% Music 82.7% Entertainment 61.6
  • 34.
    • Identify how people are linked through videos
    • Find friends’ friend
    • Run more groups on people’s interest and visualize how people’s interest are connected
    06/02/09 SI 508 Networks
  • 35. 06/02/09 SI 508 Networks

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