Optimal patrol routes: interdicting and pursuing rhino poachers

Interdiction patrolling (also known as hot spots policing) is a proactive police operation that depends on good planning. And the pursuit of fleeing suspects is a challenging operation that all police forces engage in on a regular basis. We give software tools that improve the effectiveness of both. We demonstrate the effectiveness of our tools by applying them to the case of rhino poaching in wildlife reserves. An interdiction patrol pre-emptively seeks out poaching parties within a reserve. Upon picking up the trail of a poaching party, a pursuit team needs a pursuit strategy that optimizes their chances of an interception. Our interdiction patrol route tool identifies optimal interdiction patrol routes to walk. This tool is based on a Stackelberg game and represents different types of poachers and their utilities. These utilities are updated (learned) each time new information on poaching party routes is added to the database. Our second tool provides a real-time sequence of team member moves that maximizes the team’s chances of apprehending a pursued party. We show that our tools perform well when applied to simulated and real data.     

Democratic theorizing in Taiwan: A reconstruction

This study reconstructs Taiwan people's existing discursive structures on democracy by replicating Dryzek and Berejikian's Q methodological study of American democratic discourses. It finds that under the existing specific historical circumstances, Taiwan people's democratic attitudes manifest a complex, pluralistic and interrelated discursivity, in which at least five democratic discourses can be identified, namely democratic pragmatism, democratic communitarianism, democratic liberalism, democratic elitism and democratic populism. Yet, among these five discourses, there are a number of commonly held views. In particular, they all accept democratic pluralism, reject communism and violence, believe in the fallibility of state leaders and the necessity to limit government power, and are optimistic about the future democratic development in Taiwan. This broad consensus reflects the specific historical experience of Taiwan people's democratic pursuit on the one hand and provides a broad common ground for dialogue and interaction among the five discourses on the other. These findings should significantly enrich our understanding of the democratic theorizing in Taiwan and serve as a basis for future comparison with the American as well as other countries’ experiences.