{"content":[{"text":"ABSTRACT","bbox":{"left":0.446082,"top":0.094683,"width":0.10783100000000001,"height":0.015109999999999998}},{"text":"Social media platforms such as Twitter, Facebook, and blogs have emerged as valuable","bbox":{"left":0.147059,"top":0.133362,"width":0.7059820000000001,"height":0.015110000000000012}},{"text":"– in fact, the de facto – virtual town halls for people to discover, report, share and","bbox":{"left":0.147059,"top":0.16364,"width":0.705945,"height":0.015110000000000012}},{"text":"communicate with others about various types of events.","bbox":{"left":0.147059,"top":0.193917,"width":0.48108,"height":0.015110000000000012}},{"text":"These events range from","bbox":{"left":0.642711,"top":0.193917,"width":0.21027099999999999,"height":0.015110000000000012}},{"text":"widely-known events such as the U.S Presidential debate to smaller scale, local events","bbox":{"left":0.147059,"top":0.224195,"width":0.705884,"height":0.015110000000000012}},{"text":"such as a local Halloween block party. During these events, we often witness a large","bbox":{"left":0.147059,"top":0.254474,"width":0.705943,"height":0.015110000000000012}},{"text":"amount of commentary contributed by crowds on social media.","bbox":{"left":0.147059,"top":0.284752,"width":0.5322800000000001,"height":0.015110000000000012}},{"text":"This burst of social","bbox":{"left":0.689516,"top":0.284752,"width":0.16348600000000002,"height":0.015110000000000012}},{"text":"media responses surges with the “second-screen” behavior and greatly enriches","bbox":{"left":0.147059,"top":0.31503,"width":0.6702540000000001,"height":0.015110000000000012}},{"text":"the","bbox":{"left":0.826376,"top":0.31503,"width":0.026567000000000007,"height":0.015110000000000012}},{"text":"user experience when interacting with the event and people’s awareness of an event.","bbox":{"left":0.147059,"top":0.345307,"width":0.705884,"height":0.015110000000000012}},{"text":"Monitoring and analyzing this rich and continuous ﬂow of user-generated content can","bbox":{"left":0.147059,"top":0.375585,"width":0.7059629999999999,"height":0.015110000000000012}},{"text":"yield unprecedentedly valuable information about the event,","bbox":{"left":0.147059,"top":0.405863,"width":0.5178830000000001,"height":0.015110000000000012}},{"text":"since","bbox":{"left":0.674182,"top":0.405863,"width":0.040475999999999956,"height":0.015110000000000012}},{"text":"these responses","bbox":{"left":0.723311,"top":0.405863,"width":0.129652,"height":0.015110000000000012}},{"text":"usually oﬀer far more rich and powerful views about the event that mainstream news","bbox":{"left":0.147059,"top":0.436141,"width":0.705943,"height":0.015110000000000012}},{"text":"simply could not achieve. Despite these beneﬁts, social media also tends to be noisy,","bbox":{"left":0.147059,"top":0.466419,"width":0.7059040000000001,"height":0.015110000000000012}},{"text":"chaotic, and overwhelming, posing challenges to users in seeking and distilling high","bbox":{"left":0.147059,"top":0.496698,"width":0.705943,"height":0.015109999999999957}},{"text":"quality content from that noise.","bbox":{"left":0.147059,"top":0.526975,"width":0.265788,"height":0.015109999999999957}},{"text":"In","bbox":{"left":0.17575,"top":0.557253,"width":0.01750299999999999,"height":0.015109999999999957}},{"text":"this","bbox":{"left":0.202005,"top":0.557253,"width":0.030923000000000006,"height":0.015109999999999957}},{"text":"dissertation,","bbox":{"left":0.24166,"top":0.557253,"width":0.10222499999999998,"height":0.015109999999999957}},{"text":"I explore ways to leverage social media as a","bbox":{"left":0.353222,"top":0.557253,"width":0.3836800000000001,"height":0.015109999999999957}},{"text":"source","bbox":{"left":0.745654,"top":0.557253,"width":0.05217700000000003,"height":0.015109999999999957}},{"text":"of","bbox":{"left":0.806563,"top":0.557253,"width":0.01539299999999999,"height":0.015109999999999957}},{"text":"in-","bbox":{"left":0.830688,"top":0.557253,"width":0.022309000000000023,"height":0.015109999999999957}},{"text":"formation and analyze events based on their social media responses collectively.","bbox":{"left":0.147059,"top":0.587531,"width":0.6849620000000001,"height":0.015109999999999957}},{"text":"I","bbox":{"left":0.846106,"top":0.587531,"width":0.006896000000000013,"height":0.015109999999999957}},{"text":"develop, implement and evaluate EventRadar, an event analysis toolbox which is able","bbox":{"left":0.147059,"top":0.617809,"width":0.705924,"height":0.015109999999999957}},{"text":"to identify, enrich, and characterize events using the massive amounts of social me-","bbox":{"left":0.147059,"top":0.648087,"width":0.7059230000000001,"height":0.015109999999999957}},{"text":"dia responses. EventRadar contains three automated, scalable tools to handle three","bbox":{"left":0.147059,"top":0.678364,"width":0.705981,"height":0.015109999999999957}},{"text":"core event analysis tasks: Event Characterization, Event Recognition, and Event En-","bbox":{"left":0.147059,"top":0.708642,"width":0.705962,"height":0.015109999999999957}},{"text":"richment.","bbox":{"left":0.147059,"top":0.738921,"width":0.07860699999999998,"height":0.015109999999999957}},{"text":"More speciﬁcally, I develop ET-LDA, a Bayesian model and SocSent,","bbox":{"left":0.239966,"top":0.738921,"width":0.612955,"height":0.015109999999999957}},{"text":"a matrix factorization framework for handling the Event Characterization task, i.e.,","bbox":{"left":0.147059,"top":0.769199,"width":0.706002,"height":0.015109999999999957}},{"text":"modeling characterizing an event in terms of its topics and its audience’s response","bbox":{"left":0.147059,"top":0.799477,"width":0.7059230000000001,"height":0.015109999999999957}},{"text":"behavior (via ET-LDA), and the sentiments regarding its topics (via SocSent). I also","bbox":{"left":0.147059,"top":0.829754,"width":0.705962,"height":0.015109999999999957}},{"text":"develop DeMa, an unsupervised event detection algorithm for handling the Event","bbox":{"left":0.147059,"top":0.860032,"width":0.705929,"height":0.015109999999999957}},{"text":"i","bbox":{"left":0.497343,"top":0.89777,"width":0.005294000000000021,"height":0.015109999999999957}}],"images_bbox":[],"images_bbox_not_text_overlap":[]}