9. Disruption, Protection, and Resilience

A number of location covering models have been developed to address problems of security and safety. Bell et al. (2011) applies the LSCP to identify aircraft alert sites to respond to security threats to the U.S. border and other key assets. Bao et al. (2015) dealt with the problem of locating watchtower locations for forest fire detection and monitoring. Zhang and Du (2012) describe an approach to locate a set of radars, and assign power levels to each of them so that all crucial points along a river are monitored, or covered, while minimizing the total power being used. Other interesting examples can be found in Agnetis et al. (2009), Bar-Noy et al. (2013), and Pan (2010). Addressed is the location of a set of facilities that can guard, protect or respond in an emergency, developed under the assumption that system components are always available and ready to act. In addition, it is almost always assumed that the network infrastructure will always be usable and that services such as emergency response can be made using the best routes on an unimpeded network. That is, the system always works and there are no disruptions to service.