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Future Internet is foreseen to fully handle a wide range of multimedia services allowing their access trough diverse computing devices such as laptops, TVs, PDAs and 3G mobile phones interconnected via different wire-line and wireless networking technologies. Such a diversification in the computational context reinforces the need of personalized and adaptive media services towards better end-user...
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...
Recent research in pervasive computing and distributed decision support systems aims to enable users to share knowledge easily to support one another in problem solving in a manner that adapts to their varying contexts of work. However, existing approaches, most often, are restricted by formal models of task analysis and, as such, are not able to capture the informal work practices, which workers...
Context-aware applications do not always adapt their behaviours in ways that users expect due to a variety of reasons. Applications that lack intelligibility are often incapable of offering explanations to users as to why they decided to adapt their behaviours in certain ways, and providing feedback mechanisms for users to take control of any unwanted adaptation. This can lead to loss of user trust,...
Context-aware applications automatically adapt their behavior according to environmental conditions, also known as contexts. However, in practice contexts are often inaccurate, noisy or even inconsistent (e.g., two RFID readers may report different numbers for the same set of goods processed). These kinds of problematic contexts may cause context-aware applications to behave abnormally or even fail...
Existing context-based access control mechanisms have a problem of tradeoffs between the expressive power and the management efficiency of authorization policy. In this paper we introduce the context-aware role engineering which is a new concept for context-based access control and context-aware service scenario driven role engineering approach. The context-aware role engineering enables that context-based...
Respecting an interactive context involving multiple participants, dynamic characteristics of their activities will cause situations not faithfully described in a static method. In particular, the goal that represents the meanings of activities (equally as changes on situations), is far beyond the scope of ontology languages, such as the OWL. Then, we formalize activities as a sequence of context...
Cars have become an increasingly important and exciting test bed for ubiquitous computing. However, smart car space is still little addressed in the literature to enable high adaptation in a mobile and resource-limited space. This paper focuses on building a context-aware software infrastructure for smart car space in middleware framework. To support context-awareness, we embed capabilities of context...
Context-awareness is an essential feature of pervasive applications, and runtime detection of contextual properties is one of the primary approaches to enabling context awareness. However, existing context-aware middleware does not provide sufficient support for detection of contextual properties in asynchronous environments. We argue that in asynchronous environments, the concept of time needs to...
The OWL 1has been as a modeling language to formalize context-awareness pervasive environments. And also, various kinds of context ontologies in the OWL are proposed to conceptualize the entities for describing pervasive computing environments. With increasingly considering about spatial and temporal expressive capabilities and properties related for pervasive computing, these approaches provide some...
For better user personalization, this paper explores the collecting and processing method of network users' behavior data with multi-source heterogeneity and analyzes network user behavior on the basis of context by the theory called Situation Awareness. Then, a new efficient algorithm is presented by using internet context to ensure the model of user interest auxiliary. Further, a structure model...
COSMOS DSL is a language dedicated to the domain of composition of context information. It allows, through its high-level constructions, to treat very large amounts of context data coming from distributed sources, whatsoever in ubiquitous systems or large-scale distributed systems. In this paper, we focus on the safety of programs developed in COSMOS DSL. We discuss the needs of reliability and validation...
This paper introduces context-aware adaptation as an important part of power distribution architectures. In our view context-awareness is a necessary part of administering the business policies concerning power distribution and is orthogonal to the core engineering aspects of power distribution. By decoupling the engineering logic from the business aspects we can plug in different adaptation strategies...
Ubiquitous environments provide families of context-aware applications that are capable of exploiting the user mobility as well as the device variability. Typically, these applications retrieve context information from local and remote providers and react accordingly to the detected variations. However, this must be done by considering the heterogeneity of devices and protocols found in ubiquitous...
Services are expected to be a promising way for people to use information and computing resources in the emerging ubiquitous network society. In this study, we propose a metaphoric concept called flowable service. It is defined as a logical stream that organizes and provides circumjacent services in such a way that they are perceived by individuals as those naturally embedded in their surrounding...
This paper describes the Context Awareness Framework developed for the HYDRA Middleware Project. The HYDRA project aims to develop middleware to support intelligent networked embedded system based on a service-oriented architecture, deployable on both new and existing networks of distributed wireless and wired devices. A well developed Context Awareness Framework (CAF) is crucial for the success of...
Context-awareness and adaptability are important and desirable properties of service-based processes designed to provide personalized services. Most of the existing approaches focus on the adaptation at the process instance level which involves extending the standard Business Process Execution Language (BPEL) and its engine or creating their own process languages (e.g. However, the approach proposed...
In this paper a model for the development of context-awareness applications using Near Field Communication is presented. The model is based in the association of services and resources to augmented objects through Tags. The different types of services assigned to the objects are modeled in a hierarchy defining the execution order and personalizing the user interaction through the use of resources...
Automotive software has increasingly become context-aware and adaptive to deal with dynamically changing environments. This paper presents our novel service-based approach to support the structural and behavioral adaptation of automotive telematics. We adopt services to (1) provide physical context facts and (2) facilitate context-aware interactions between entities of automotive telematics systems...
Effectively guiding people in complex and highly dynamic work environment requires advances in high-level declarative activity models that can describe the flow of human work activities and their intended outcomes, as well as novel user interface models for distributing guidance information across time and space. This paper describes a new line of research aimed at developing a new programming and...
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