Information & communication in "mediated" crisis response
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This thesis is composed of three essays focusing on communication and information issues in the context of "mediated" emergency response, wherein the messages are directed from on-site to remote locations through mediators. The first thesis paper explores communication issues in the dispatch-mediated local emergency response system, and develops a messaging model, consisting of message structures and formats, to foster message standardization. The second thesis essay investigates information issues in the crisis microblogs, and characterizes a solution using a big-data driven methodology to extract crisis news and hot topics by combining similarity scores from text mining and graph analysis methods. The third thesis essay examines the quality issues in crowdsourced crisis response, by developing and validating an information categorization model, and providing practical guidelines to crisis practitioners for crowdsourcing crisis work.