Background: As a material (typically, a metal) is stretched, it can reach a point where all of the strain (deformation) is concentrated in just one area. For example, notice in the figure below how the material has become very narrow across a short length in the specimen which was initially cylindrical. This condition is called
Sensor networks and networks of wearable communication systems (for example: networks that support emergency workers in their efforts) have strong requirements on their energy consumption. Instead of only focusing on minimization of energy consumption of the individual nodes (which leads to locally optimal solutions) it is important to maximize the lifetime of the whole network.