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Integrating physical and information space into applications increases application's complexity and development difficulty. In Ubiquitous environment, context collection, aggregation and notification raise complex scientific problems and new challenges. In this paper we address these challenges by proposing a conceptual context-oriented middleware architecture. We first discuss the reason to use context...
Pervasive computing refers to a seamless and invisible computing environment in which ubiquitous and connected computing devices gather information about the environment. Such computer-enabled artefacts represent a new category of smart products where objects are aware of their surroundings and cable of supporting users in various tasks. However, the complex and dynamic domain of smart products is...
Context-aware applications are becoming commonplace in everyday life thanks to recent advances in mobile devices, sensor capabilities and wireless communication networks. However, making the manipulation of context information efficient is still an important issue. Taking into account the quality of context data becomes a corner stone of an efficient context management. In this paper, we argue for...
The ability of recognizing the environment is one of the most important functions that the ubiquitous computing system should have. With the recognition of the environment, the system can execute intelligent behaviors such as runtime configuration and semantic based process branch. This recognition can be used as context for system's decision making. And with correct context, the system can make a...
Some types of contextual information are more important than others for inferring a situation of the patient in home-based care. The weight of this information may be changed due to the variations of the sensed values over time. Some researches applied a static weighting based fusion process to their systems to model these variations. However, this fusion process sometimes reduces the reliability...
Although Wireless Sensor Networks (WSNn) are designed to operate with low power consumption, much of the research in this field focuses on improving the efficiency of resource usage. In many scenarios, WSNs are configured to monitor and transmit the observed data periodically. This can lead to duplication of traffic in the network if most of the sensed data does not change over time under normal conditions...
With advances in sensor techniques, much research is focused on USN (Ubiquitous Sensor Network) computing services and context analysis service is an important field among them. However, sensor stream data, which is generated from sensors used in many USN domain applications, is too fast to control each of them and the volume is too huge to store the whole data. Hence, in order to provide rapid and...
The Mobile Ontology-based Reasoning and Feedback (MORF) health-monitoring system seamlessly integrates vital data from various health sensors to identify a patient's health status. The system can then take appropriate measures for timely support.
The existing music search and recommendation systems obtain results through query or answer and recommend music using data mining techniques. However, it is not possible to provide active services that satisfy customers in smart home environments because these systems consider only static information in Web environments. In order to solve these problems, this paper attempts to define context information...
The increasing complexity of the context sensitive systems, and the difficulties of their management, administration and adaptation have headed us towards the necessity of integrating self-* autonomic computing paradigms (self-configuring, self-healing, self-optimizing and self-protecting) into the development of context sensitive pervasive systempsilas functional components. This paper introduces...
In this paper, we propose a sensor-based interaction for ubiquitous virtual reality (U-VR) systems that users are able to interact implicitly or explicitly with through a sensor. Due to the advances in sensor technology, we can utilize sensory data as a means of user interactions. To show the feasibility of the proposed method, we extend the Composar augmented reality (AR) authoring tool to add support...
The seamless combining with context-aware sensors and numerous devices and e-home server will soon become a part of our home environment in the near future. We name it as a context-aware home based on ubiquitous computing concept. This context-aware home reduces participations of users in order to realize a ubiquitous computing and automates various services. Therefore, the risk of privacy violation...
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