Post on 15-Apr-2017
transcript
What is Twitter, a Social Network or a News Media?
Speaker: ChinHui Chen
AgendaIntroduction
Topological Analysis
Ranking Twitter Users
Trending The Trends
Introduction
Introduction
Goal:topological characteristics of Twitter its power as a new medium of information sharing.
First quantitative study on the entire Twitter sphere and information diffusion on it.
What is twitter?
FoundedSan Francisco, California,United States
FounderJack DorseyEvan WilliamsBiz Stone
LaunchedJuly 15, 2006
wiki
Revenue US $150 million (projected 2010)
Alexa rank 9 (March 2011)
Users200 million (March 2011)
Employees450 (2011)
wiki
Kelly, Ryan, ed (August 12, 2009). "Twitter Study – August 2009"
Dataset
June 6th - June 31st, 2009
User profiles: 41.7 million
4,262 unique trending topics
Tweets: 106 millions
Available Online
We make our dataset publicly available online at: http://an.kaist.ac.kr/traces/WWW2010.html
Topological Analysis
Basic Analysis
Followers vs. Tweets
Reciprocity
Degree of Separation
Homophily
Basic Analysis
complementary cumulative distribution function
40 users > a million followers
Followers / Tweets
Impact of Retweets
What’s Retweet?
Target
How exactly does information spread on Twitter?
Audience Size of Retweet
Retweet Trees
Temporal Analysis of Retweet
Favoritism in Retweet
Outline
Audience Size of Retweet
1. median < avg
-> many tweets have a large number of additional recipients
2. #1000
3. power of retweeting
-> user spread power -> determines important -> collective
Retweet Trees
Retweet Trees
Retweet Trees
height 1 : 95.8%
97.6%
less than 6 degrees of separation, height < 6
no trees > 11 hops
user dist -> power law
Temporal Analysis
How soon appear / How long last
Temporal Analysis
Temporal Analysis
The strength of Twitter as a medium for information diffusion stands out by the speed of retweets.
Favoritism in Retweet
kY(k) ~ 1 kY(k) ~ k
Favoritism in Retweet
People only retweets from a small number of people and only a subset of a user’s followers actually retweet.
Realtime Search
TREC 2011
TREC 2011
Thoughts
Buy in
Response
Tweet -> Product
Users sell Product
Someone buy it
Predict what kind of product will be popular?
A new UI?
Thanks