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Using Social Media Content to Inform Agent-based Models for Humanitarian Crisis Response

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dc.contributor.advisor Crooks, Andrew T. Wise, Sarah
dc.creator Wise, Sarah en_US 2014-09-18T01:54:47Z 2014-09-18T01:54:47Z 2014-05 en_US
dc.description.abstract Crisis response is a time-sensitive problem with multiple concurrent and interacting subprocesses, applied around the world in a wide range of contexts and with access to varying levels of resources. The movement of individuals with their shifting patterns of need and, frequently, disrupted normal support systems pose challenges to responders trying to understand what is needed, where, and when. Unfortunately, crises frequently occur in parts of the world that lack the infrastructure to respond to them and the information to inform responders where to target their efforts. In light of these challenges, researchers can make use of new data sources and technologies, combining the information products with simulation techniques to gain knowledge of the situation and to explore the various ways in which a crisis may develop. These new data sources - including social media such as Twitter and volunteered geographic information (VGI) from groups such as OpenStreetMap - can be combined with authoritative data sources in order to create rich, synthetic datasets, which may in turn be subjected to processes such as sentiment analysis and social network analysis. Further, these datasets can be transformed into information which supports powerful agent- based models (ABM). Such models can capture the behavior of heterogeneous individuals and their decision-making process, allowing researchers to explore the emergent dynamics of crisis situations. To that end, this research explores the gathering, cleaning, and synthesis of diverse data sources as well as the information which can be extracted from such synthetic data sources. Further, the work presents a rich, behaviorally complex agent-based model of an evacuation effort. The case study deals with the 2012 Colorado Wildfires, which threatened the city of Colorado Springs and prompted the evacuation of over 28,000 persons over the course of four days. The model itself explores how a synthetic population with automatically generated synthetic social networks communicates about and responds to the developing crisis, utilizing real evacuation order information as well as a model of wildfire development to which the individual agents respond. This research contributes to the study of data synthesis, agent-based modeling, and crisis development.
dc.format.extent 311 pages en_US
dc.language.iso en en_US
dc.rights Copyright 2014 Sarah Wise en_US
dc.subject System science en_US
dc.subject Computer science en_US
dc.subject Geographic information science and geodesy en_US
dc.subject agent-based modeling en_US
dc.subject crisis response en_US
dc.subject geographic information systems en_US
dc.subject social media en_US
dc.subject social networks en_US
dc.title Using Social Media Content to Inform Agent-based Models for Humanitarian Crisis Response en_US
dc.type Dissertation en Doctoral en Computational Social Science en George Mason University en

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    Seeking to understand the human mind: how it came to be, how it relates to the electrochemical activities of networks of nerve cells in the brain, how it can be modeled on computers, and how it is a vital component of what we are.

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