TWITTER EFFECT:A SOCIAL NETWORK?

ORA NEWS MEDIA?

Presented by: Bohyun KimGuided 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

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

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?

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?

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

DATA COLLECTION Gathering data

User profiles Starting point Trending topics Tweets

Removing unwanted tweets Spam tweets How to rid of?

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

ON TWITTER’S TRAIL Basic Analysis

Number of followings and followers Followers vs. Tweets Reciprocity

ON TWITTER’S TRAIL Basic Analysis

Degree of Separation Homophily

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

RANKING OF TWITTER USERS1. Ranking by the Number of Followers 2. PageRank algorithm (An algorithm developed by

Larry Page, Google’s founder and CEO)3. Retweets algorithm

• Number of ReTweets used as a measure of Tweet’s popularity hence the Tweet writer’s popularity

COMPARISON OF RANKINGS Kendall’s Tau algorithm to compare only the

top k lists of the generated three ranking lists.

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

TRENDING THE TRENDS Comparison with trends in other media

Singleton, Reply, Mention, and ReTweet

User Participation in Trending Topics

Active Period of Trends

TRENDING THE TRENDS

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

IMPACT OF RETWEET Audience size of ReTweet

ReTweet trees

Temporal Analysis of ReTweet

Favoritism in ReTweet

POWER OF RETWEETS

FAVORITISM IN RETWEET

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

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

OUTLINE Data collection

Basic Analysis of follower, following and tweets

Ranking of Twitter users

Trending the trends

Impact of retweet

Related Work

Conclusion

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

Thank you