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
How and why people Twitter: the role that micro-blogging plays in informal communication at work
Proceedings of the ACM 2009 international conference on Supporting group work
Visualizing hot spot analysis result based on mashup
Proceedings of the 2009 International Workshop on Location Based Social Networks
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Earthquake shakes Twitter users: real-time event detection by social sensors
Proceedings of the 19th international conference on World wide web
Discovery of user behavior patterns from geo-tagged micro-blogs
Proceedings of the 4th International Conference on Uniquitous Information Management and Communication
Least squares quantization in PCM
IEEE Transactions on Information Theory
Urban area characterization based on semantics of crowd activities in Twitter
GeoS'11 Proceedings of the 4th international conference on GeoSpatial semantics
Space-time dynamics of topics in streaming text
Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks
Crowd-based urban characterization: extracting crowd behavioral patterns in urban areas from Twitter
Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks
Proceedings of the 20th ACM international conference on Information and knowledge management
Expert Systems with Applications: An International Journal
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication
DigiGraff: considering graffiti as a location based social network
CHI '12 Extended Abstracts on Human Factors in Computing Systems
Detection, classification and visualization of place-triggered geotagged tweets
Proceedings of the 2012 ACM Conference on Ubiquitous Computing
A Ubiquitous Image Tagging System Using User Context
WI-IAT '12 Proceedings of the The 2012 IEEE/WIC/ACM International Joint Conferences on Web Intelligence and Intelligent Agent Technology - Volume 01
Urban area characterization based on crowd behavioral lifelogs over Twitter
Personal and Ubiquitous Computing
A novel method for geographical social event detection in social media
Proceedings of the Fifth International Conference on Internet Multimedia Computing and Service
GeSoDeck: a geo-social event detection and tracking system
Proceedings of the 21st ACM international conference on Multimedia
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Recently, microblogging sites such as Twitter have garnered a great deal of attention as an advanced form of location-aware social network services, whereby individuals can easily and instantly share their most recent updates from any place. In this study, we aim to develop a geo-social event detection system by monitoring crowd behaviors indirectly via Twitter. In particular, we attempt to find out the occurrence of local events such as local festivals; a considerable number of Twitter users probably write many posts about these events. To detect such unusual geo-social events, we depend on geographical regularities deduced from the usual behavior patterns of crowds with geo-tagged microblogs. By comparing these regularities with the estimated ones, we decide whether there are any unusual events happening in the monitored geographical area. Finally, we describe the experimental results to evaluate the proposed unusuality detection method on the basis of geographical regularities obtained from a large number of geo-tagged tweets around Japan via Twitter.