1. Speaker：Xu Bo
Time：2011/9/7

8. Questions How are people connected on Twitter?
Who are the most influential people?
What do people talk about?
How does information diffuse via retweet?

11. Question 1 How are people connected on Twitter?
# of followings/followers
Followers vs. Tweets
Reciprocity
Degree of Separation
Homophily

14. Followers VS. Twitters

15. Followers VS. Twitters

21. Homophily

24. Question 2 Who are the most influential people? Followers PageRank
Retweets

27. Kendall’s tau变种

28. Question 3
What do people talk about?

30. Singleton, Reply, Mention, Retweet

32. We consider a trending topic inactive if there is no tweet on the topic for 24 hours (a)73% topics have a single active period; 15% have 2; 5% have 3 (b)31% are 1 day long; only 7% longer than 10 days.

33. On the number of tweets and their times

34. Question 4
How does information diffuse via retweet?

35. Retweet Trees
We are now interested in how far and deep retweets travel in Twitter