Renault John

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Among the open problems in P2P systems, support for non-trivial search predicates, standardized query languages , distributed query processing, query load balancing, and quality of query results have been identified as some of the most relevant issues. This paper describes how range queries as an important non-trivial search predicate can be supported in a(More)
In recent time, the idea of collecting and combining large public data sets and services became more and more popular. The special characteristics of such systems and the requirements of the participants demand for strictly decentralized solutions. However, this comes along with several ambitious challenges a corresponding system has to overcome. In this(More)
The singular perturbation techniques occurred at the beginning of the 20th century (see [1]). The development of this method led to the efficient use in various fields in mathematical physics and engineering, for instance, fluid mechanics, fluid dynamics, elasticity, quantum mechanics, chemical-reactor, aerodynamics etc. (see [2] for a survey). Lyapunov(More)
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