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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...
Pervasive computing systems often use middleware as a means to communicate with the changing environment. However, the interactions with the context-aware middleware as well as the interactions among applications sharing the same middleware may introduce faults that are difficult to reveal by existing testing techniques. Our previous work proposed the notion of context diversity as a metric to measure...
Due to technological advances of handheld computing and communication devices, Mobile commerce (M-commerce) has emerged and attracted a growing number of research efforts. M-commerce not only extends Internet-based Electronic commerce (E-commerce), but also offers a unique business opportunity with its own features, such as ubiquity, accessibility, portability, etc. In this paper, we discuss some...
A traditional research direction in SA and dependability is to deduce system dependability properties from the Knowledge of the system Software Architecture. This will reflect the fact that traditional systems are built by using the closed world assumption. In mobile and ubiquitous systems this line of reasoning becomes too restrictive to apply due to the inherent dynamicity and heterogeneity of the...
Service-oriented computing enables service providers to publish their business functionalities in the form of abstract contracts, which can be discovered by service consumers based on open and standard protocols. Enterprise may be running a number of multiple business processes in parallel, which may require different services to fulfill the functionality. To provide better search, query, composition,...
Service process usually needs to be tailored for reuse because of change of context. In this paper, we present a mining approach to mining process change sequences based on different context using partial derivatives of the factors affecting the change context, thus finding the best feasible sequence.
Mashup tools are becoming increasingly important enabling users to compose services and processes on the Web. Most existing tools focus on Web-based interfaces, usability, and visual languages for creating mashups. A major challenge that has received limited attention is context-awareness and adaptivity of service mashups. In this paper we focus on two main aspects: First, a service capability model...
This paper proposes a semantic pattern-based context-aware (SPBCA) middleware for ubiquitous computing environments. It introduces two concepts, the ontology and the proactive conversion, to solve the heterogeneity issues existing in the interaction process in the ubiquitous computing environments. Furthermore, it can support user-centric context awareness not only by automatic reactive information...
With the prevalence of pervasive devices, plenty of applications need to support context awareness. Due to the heterogeneity of context information, it is necessary to provide a set of common vocabularies with shared semantics. Based on above requirements, the paper presents an architecture of ontology-based context-aware application in pervasive environment. In the architecture context processing...
In ubiquitous computing scenarios, there is urgent need for service infrastructure to provide effective service provision according to current context such as device capability, network status and user preference, etc. Our work focused on developing a context-aware service selection engine that can dynamically select appropriate services for end-users. To serve this purpose, we explored the traditional...
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