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  • Min Hu Rebecca Yu Nayeoung Kim 06/02/09 SI 508 Networks
    • 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
    • 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
    • Correlation Coefficient: 0.312451
    • But
    06/02/09 SI 508 Networks
    • More videos, increasing number of users with a higher number of subscribers
    06/02/09 SI 508 Networks
    • Correlation Coefficient: 0.550248
    06/02/09 SI 508 Networks
    • More subscribers, increasing number of friends
    06/02/09 SI 508 Networks
    • Many Videos Uploaded by Few Users
    06/02/09 SI 508 Networks
    • Most Videos are Uploaded by Few Users
    06/02/09 SI 508 Networks
    • Most Subscribers Subscribing to Few Users
    06/02/09 SI 508 Networks
    • Most Subscribers Subscribing to Few Users
    06/02/09 SI 508 Networks
    • Most People are Friends to Few Users
    06/02/09 SI 508 Networks
    • Most Videos Uploaded by Few Users
    06/02/09 SI 508 Networks
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
    • Low CC
    • Avg. shortest path is around 3.5-5.5(exclude unreachable pairs)
    06/02/09 SI 508 Networks
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • # of Vertices: 658
    • Lower CC
    • Avg. shortest path is around 3.2-4.5(exclude unreachable pairs)
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • # of Vertices: 723
  • # of Vertices: 4165
    • The Clustering Coefficient of the network of member's friends in music group increase from 0.07 to 0.76
    • Low CC
    • Avg. shortest path is around 3.5-5.5(exclude unreachable pairs)
    06/02/09 SI 508 Networks
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • # of Vertices: 658
    • Lower CC
    • Avg. shortest path is around 3.2-4.5(exclude unreachable pairs)
    • Real network has
    • Higher CC
    • Higher centrality measures
    • Lower avg. shortest path
  • # of Vertices: 723
  • # of Vertices: 4165
    • The Clustering Coefficient of friend network for music group increase from 0.07 to 0.76
    • 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
  • 06/02/09 SI 508 Networks
  • 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
    • 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
  • 06/02/09 SI 508 Networks