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TWITTER EFFECT: a Social Network? OR a News media?

TWITTER EFFECT: a Social Network? OR a News media?. Presented by: Bohyun Kim Guided by: Augustin Chaintreau. What is Twitter? . Paper Objective. To study the topology of the characteristics of Twitter and its power as a new medium of information sharing

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TWITTER EFFECT: a Social Network? OR a News media?

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  1. TWITTER EFFECT:a Social Network? ORa News media? Presented by: Bohyun Kim Guided by: Augustin Chaintreau

  2. What is Twitter?

  3. Paper Objective • To study the topology of the characteristics of Twitter and its power as a new medium of information sharing • To study how Twitter follow the characteristics of other social network mediums. • To study such trends in popular topics that users tweet and how this information spread

  4. Motivation • More than 41 million users in July 2009 • Only after half a year, 200+ million Twitter users! • Is twitter like Facebook? • 140 characters can be long enough! • Do you like to tweet or retweet? • Who is the most famous Twitter user? Barack Obama?

  5. Problem Formulation • How are people connected on Twitter? • Who are the most influential person? • What do people talk about? • How does information diffuse via retweet?

  6. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  7. Data Collection • Gathering data • User profiles • Starting point • Trending topics • Tweets • Removing unwanted tweets • Spam tweets • How to rid of?

  8. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  9. On Twitter’s Trail • Basic Analysis • Number of followings and followers • Followers vs. Tweets • Reciprocity

  10. On Twitter’s Trail • Basic Analysis • Degree of Separation • Homophily

  11. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  12. Ranking of Twitter users • Ranking by the Number of Followers • PageRank algorithm (An algorithm developed by Larry Page, Google’s founder and CEO) • Retweets algorithm • Number of ReTweets used as a measure of Tweet’s popularity hence the Tweet writer’s popularity

  13. Comparison of Rankings • Kendall’s Tau algorithm to compare only the top k lists of the generated three ranking lists.

  14. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  15. Trending the Trends • Comparison with trends in other media • Singleton, Reply, Mention, and ReTweet • User Participation in Trending Topics • Active Period of Trends

  16. Trending the Trends

  17. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  18. Impact of ReTweet • Audience size of ReTweet • ReTweet trees • Temporal Analysis of ReTweet • Favoritism in ReTweet

  19. Power of ReTweets

  20. Favoritism in ReTweet

  21. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  22. Related Work • Analyze the user characteristics by the relationships between the number of followers and that of following [Krishnamurthy et al.] • Information diffusion in online social networks

  23. Outline • Data collection • Basic Analysis of follower, followingand tweets • Ranking of Twitter users • Trending the trends • Impact of retweet • Related Work • Conclusion

  24. Conclusion • We ranked users by number of followers and PageRank – similar result • Ranking by number of ReTweets differ from the other two – indicates a gap in influence from the number of followers and the popularity of tweets • Ranking by ReTweets expose influence of other media in a new perspective • Once ReTweeted, a tweet gets retweeted almost instantly on the 2nd, 3rd, 4th hops away from the source • ReTweet allows relay of information propagation

  25. Thank you

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