Trawling the Web for emerging cyber-communities
WWW '99 Proceedings of the eighth international conference on World Wide Web
Authoritative sources in a hyperlinked environment
Proceedings of the ninth annual ACM-SIAM symposium on Discrete algorithms
Proceedings of the 9th international World Wide Web conference on Computer networks : the international journal of computer and telecommunications netowrking
Efficient identification of Web communities
Proceedings of the sixth ACM SIGKDD international conference on Knowledge discovery and data mining
Scaling personalized web search
WWW '03 Proceedings of the 12th international conference on World Wide Web
On the bursty evolution of blogspace
WWW '03 Proceedings of the 12th international conference on World Wide Web
Impact of search engines on page popularity
Proceedings of the 13th international conference on World Wide Web
Information diffusion through blogspace
Proceedings of the 13th international conference on World Wide Web
Combating web spam with trustrank
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Why we twitter: understanding microblogging usage and communities
Proceedings of the 9th WebKDD and 1st SNA-KDD 2007 workshop on Web mining and social network analysis
Proceedings of the first workshop on Online social networks
Identifying bloggers with marketing influence in the blogosphere
Proceedings of the 11th International Conference on Electronic Commerce
Ranking mechanisms in twitter-like forums
Proceedings of the third ACM international conference on Web search and data mining
TwitterRank: finding topic-sensitive influential twitterers
Proceedings of the third ACM international conference on Web search and data mining
Unsupervised modeling of Twitter conversations
HLT '10 Human Language Technologies: The 2010 Annual Conference of the North American Chapter of the Association for Computational Linguistics
Effective ranking techniques for book review retrieval based on the structural feature
ICHIT'11 Proceedings of the 5th international conference on Convergence and hybrid information technology
DS'11 Proceedings of the 14th international conference on Discovery science
Adding semantics to microblog posts
Proceedings of the fifth ACM international conference on Web search and data mining
Identifying communicator roles in twitter
Proceedings of the 21st international conference companion on World Wide Web
A tweet-centric approach for topic-specific author ranking in micro-blog
ADMA'11 Proceedings of the 7th international conference on Advanced Data Mining and Applications - Volume Part I
Measuring node importance on Twitter microblogging
Proceedings of the 2nd International Conference on Web Intelligence, Mining and Semantics
Inferring who-is-who in the Twitter social network
Proceedings of the 2012 ACM workshop on Workshop on online social networks
Social-network analysis using topic models
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
Cognos: crowdsourcing search for topic experts in microblogs
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
Efficient filtering in micro-blogging systems: we won't get flooded again
SSDBM'12 Proceedings of the 24th international conference on Scientific and Statistical Database Management
Inferring who-is-who in the Twitter social network
ACM SIGCOMM Computer Communication Review - Special october issue SIGCOMM '12
Mixing methods and theory to explore web activity
Proceedings of the 3rd Annual ACM Web Science Conference
Identifying and characterizing user communities on Twitter during crisis events
Proceedings of the 2012 workshop on Data-driven user behavioral modelling and mining from social media
Using link analysis to discover interesting messages spread across Twitter
TextGraphs-7 '12 Workshop Proceedings of TextGraphs-7 on Graph-based Methods for Natural Language Processing
Detecting hot topics in chinese microblog streams based on frequent patterns mining
WISM'12 Proceedings of the 2012 international conference on Web Information Systems and Mining
Towards Twitter context summarization with user influence models
Proceedings of the sixth ACM international conference on Web search and data mining
To follow or not to follow: a feature evaluation
Proceedings of the 22nd international conference on World Wide Web companion
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Twitter, a micro-blogging platform with an estimated 20 million unique monthly visitors and over 100 million registered users, offers an abundance of rich, structured data at a rate exceeding 600 tweets per second. Recent efforts to leverage this social data to rank users by quality and topical relevance have largely focused on the "follow" relationship. Twitter's data offers additional implicit relationships between users, however, such as "retweets" and "mentions". In this paper we investigate the semantics of the follow and retweet relationships. Specifically, we show that the transitivity of topical relevance is better preserved over retweet links, and that retweeting a user is a significantly stronger indicator of topical interest than following him. We demonstrate these properties by ranking users with two variants of the PageRank algorithm; one based on the follows sub-graph and one based on the implicit retweet sub-graph. We perform a user study to assess the topical relevance of the resulting top-ranked users.