This paper presents a Distributed Efficient Clustering Approach (DECA) for mobility-resistant andenergy-efficient clustering in multi-hop wireless networks. The clusterheads cover the whole network and each node in the network can exclusively determine the single cluster it belongs. DECA is fully distributed, each node transmits only one message during clustering operation, and the algorithm terminates in deterministic time without iterations. Theoretical results show the correctness of DECA, and extensive simulation results demonstrate that DECA is energy-efficient and robust against node mobility.
In this paper, we describe an approach to agent design using a three-tier architecture that promotes composing agents from reusable components. We also present a CASE tool called DIVA TM that allows software engineers to compose and modify such design documents, and automates their transition to implementation. DIVA is integrated with Rose TM from Rational Corporation for exchanging design documents, and with Cybele TM agent infrastructure for translating the design documents to implementation. DIVA has been successfully used in manufacturing and transportation projects.
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