Mike Powell

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The Humanitarian eXchange Language (HXL) is a project by the United Nations Office for the Coordination of Humanitarian Affairs that aims at refining data management and exchange for disaster response. Data exchange in this field, which often has to deal with chaotic environments heavily affected by an emergency such as a natural disaster or an armed(More)
We study games in which each player can simultaneously exert costly effort that provides different benefits to some of the other players. The static analysis of the game yields a prediction of no cooperation, while a standard repeated games approach yields a folk theorem. To obtain more refined predictions about repeated play, we start from the observation(More)
In the event of a disaster, coordination of emergency respon-ders is challenging due to the diversity of support systems in use. Work is now being done to tackle the problem leveraging semantic technologies. The chosen approach focuses on the interoperability between Emergency Management Systems (EMSs) via data mediation and a reference ontol-ogy. This(More)
These notes are based on a course of lectures given at Stanford, and cover three major topics relevant to optimization theory. First an introduction is given to those results in mathematical programming which appear to be most important for the development and analysis of practical algorithms. Next unconstrained optimization problems are considered. The(More)
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