This paper discusses the location or strengthening of cell phone towers so as to maximize service coverage and minimize the loss of communications if a natural disaster happens. This paper demonstrates that, under a high likelihood of destruction of antennas (towers), the customary method of...

This paper models the locations of landfills and transfer stations and simultaneously determines the sizes of the landfills that are to be established. The model is formulated as a bi-objective mixed integer optimization problem, in which one objective is the usual cost-minimization, while the...

Location set covering models were first described in the early 1970s. In their simplest form, they minimize the number of facilities necessary to completely cover a set of customers in some given space, where covering means providing service within a predetermined distance. This paper considers...

This paper describes a constrained optimization method that was inspired by the physical equivalent of a small ball that, propelled only by gravity, is dropped from an initial point inside a full-dimensional body, represented by the set of feasible solutions. The ball will eventually hit one of...

This paper describes a constrained optimization method that was inspired by the physical equivalent of a small ball that, propelled only by gravity, is dropped from an initial point inside a full-dimensional body, represented by the set of feasible solutions. The ball will eventually hit one of...