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The pervasive computing vision consists in realizing ubiquitous technologies to support the execution of people's everyday tasks by proactively providing appropriate information and services in a natural and transparent way based on the current context. Hence, a fundamental ingredient of pervasive computing is a mechanism to recognize the current high level context of users based on lower level context...
We describe a class of metrics which relate the accuracy of a sensor network measurement one achieves when using a certain MAC protocol with the energy the MAC protocol consumes. To measure accuracy we compare the true values of the physical phenomena and the values reconstructed at the sink. We propose three ways to compare them, the difference between the function of the physical phenomena and the...
The proliferation of WLAN infrastructures has facilitated numerous indoor localization techniques using WLAN fingerprints. In particular, identifying a room or a place in urban environments could be usefully utilized in many application domains such as ubiquitous health. However, it is not straightforward how to bootstrap such a localization system because WLAN fingerprints of all places must be available...
This paper examines the feasibility of using ontologies to model generic sensor networks, based on the capabilities of the current generation of ontology tools. The creation of such an ontology, the current tool's capacity to adequately maintain it, and its potential functionality, as part of a larger semantic system are addressed here. These topics were addressed by constructing a generic sensor...
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