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The operational environments of sensor networks will alter over time, often due to hazardous conditions or fluctuating resource availability; however this important characteristic of sensor networks has yet to be fully addressed by current middleware solutions. In this paper, the authors present a reflective middleware solution for co-ordinated dynamic reconfiguration of middleware behaviour across nodes in a sensor network. They evaluate this approach in a real-world case study; firstly, they demonstrate how dynamic reconfiguration optimises the performance and resource consumption of a sensor application, and secondly they illustrate that the costs of reconfiguration are not prohibitive in this domain.
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