Cindy Hui

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Diffusion occurs in various contexts and generally involves a network of entities and interactions between entities. Through these interactions, some property, e.g. information, ideas, etc., is spread through the network. This paper presents a general model of diffusion in dynamic networks. We simulate the diffusion of evacuation warnings in multiple(More)
The focus of this paper is on demonstrating how a model of the diffusion of actionable information can be used to study information cascades on Twitter that are in response to an actual crisis event, and its concomitant alerts and warning messages from emergency managers. We will: identify the types of information requested or shared during a crisis(More)
Diffusion occurs in various contexts and generally involves a network of entities and interactions between entities. Through these interactions, some property, e.g. information, ideas, etc., is spread through the network. The network may become dynamic as entities in the network interact and information, ideas, etc. flow through the network. This paper(More)
This paper presents a unique view of modeling the diffusion of warnings in social networks where the network structure may change over time. Since the characteristics and actions of people in a community have significant influence on the flow of information through a network, we present an axiomatic framework for modeling the diffusion process through the(More)
The Department of Homeland Security identifies stadium safety as a crucial component of risk mitigation in the US. Patron screening poses difficult trade-offs for security officials: rigorous screening prevents weapons from entering the structure, but it also creates lines that become security hazards and may be infeasible if patrons are to get into the(More)
Diffusion occurs in various contexts and generally involves a network of entities that interact in some way. Through these interactions, some property, e.g. information, idea, innovation , disease, etc., is diffused through the network. The flow of these information, ideas, etc. may in turn have an effect on how the entities interact. The network becomes(More)
In this work, we study the effectiveness of information retraction in situations where information being spread requires recipients to make a decision or take an action. Consider the scenario where information is introduced into a network, advising recipients to take an action. If at a later time, the information is found to be inaccurate and the action is(More)
Consider the scenario where information is introduced into a network, advising recipients to take an action. If at a later time, the information is found to be inaccurate and the action is unnecessary, it becomes necessary to stop the information from spreading and to prevent actors from taking the action. We investigate the concept of introducing counter(More)
The diffusion of information depends on the nature of the information itself as well as the structure and properties of the social network supporting the diffusion. This research focuses on the role of weak ties in the flow of information in social networks. Weak ties connect individuals that are socially farther apart and in different communities, allowing(More)