Speaker： Xu BoTime： 2011/9/7

Questions

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

Question 1

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

Followers VS. Twitters

Followers VS. Twitters

Homophily

Question 2

• Who are the most influential people?– Followers– PageRank– Retweets

Kendall’s tau变种

Question 3

• What do people talk about?

Singleton, Reply, Mention, Retweet

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.

On the number of tweets and their times

Question 4

• How does information diffuse via retweet?

Retweet Trees• We are now interested in how far and deep retweets travel in

Twitter