Interpretação e disseminação de contexto: filtragem semântica, projeto arquitetural e estudo de caso em saúde
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2015-05-06
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Universidade Federal de Goiás
Resumo
Context-aware computing investigates how to seamlessly enable the interaction among
computing devices and the environment, or context, in which they are located in. The literature
has defined the life cycle of context data as composed of four phases: acquisition,
modelling, reasoning and dissemination. These latter two phases have been strongly influenced
by the heterogeneity of published data, as a consequence of the increasing deployment
of sensors. A great challenge reported in the literature has been the development of
mechanisms for handling and reasoning about sensor data, and also for notifying contextaware
applications in an efficient and relevant manner. Aiming to solve this problem, this
research focuses on a new approach for semantic context reasoning and filtering in accordance
with design principles recommended by the literature. As a result of this work,
the main contributions include an extensible and maintainable mechanism for semantic
context filtering; the architectural model of a context reasoning component, called Hermes
Interpreter (HI); the Hermes Base component, which exposes an API for accessing a
publish-subscribe-based communication middleware; and HI’s functional validation and
performance evaluation in a simulated scenario of vital signs monitoring in Intensive Care
Units and wards. This research demonstrated the efficiency of the behaviour of the semantic
filtering mechanism for end users applications. Besides, by increasing the number of
subscribers, it was observed that the response time was acceptable in almost all experiments.
Despite this, it was also verified the high cost of the semantic filtering processing
in comparison with pure context reasoning activities. Regarding the HI component’s architectural
design, this work recommends it as a reusable artifact for researches on the
subject of context reasoning.
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MARANHÃO, G. M. Interpretação e disseminação de contexto: filtragem semântica, projeto arquitetural e estudo de caso em saúde. 2015. 154 f. Dissertação (Mestrado em Ciência da Computação) - Universidade Federal de Goiás, Goiânia, 2015.