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With the convergence of pervasive mobile computing and social networking, interest has grown significantly in software systems and applications that are aware of users' social context to make pervasive applications more intelligent and accessible. Thus, socially-aware systems have further advanced context-aware systems taking account of human social context such as social relationships to enable the...
Context-awareness and adaptability are highly desirable features for services that are operating in dynamic environments. Recently, a number of approaches have been introduced to support the development of such services. But, validating the varying requirements of these services is still a major challenge. In this paper, we introduce a novel scenario-based approach to address this challenge. First,...
There is an increasing demand for context-aware adaptive services that can evolve at runtime in response to unanticipated changes in their environments or functionalities. Enabling the runtime evolution of such context-aware adaptive services is still a major challenge. In this paper, we introduce a novel approach to tackle this challenge. At the development time, our approach explicitly models a...
Verifying adaptive behavior is a critical challenge in the development of context-aware systems due to their complexity and uncertainty. This paper presents our novel model-based approach that provides a modeling framework to (1) specify the structural and behavioral aspects of a context-aware system, (2) define invariants of the system that need to be satisfied regardless of the adaptations, and...
In a cooperative convoy, a vehicle interacts with other vehicles, service providers and infrastructure systems to make the travel safe and convenient. Through these interactions a vehicle can share its domain-specific information -- acquired from service providers and infrastructure -- with other vehicles in the convoy. Such interactions are subject to defined agreements and constraints between the...
Many software systems need to be developed with adaptation in mind, where at runtime they need to detect changes in their operating environments and adapt themselves to cope with these changes while achieving or preserving the overall system goals. In recent years, there has been much research in the communities of context-aware systems and self-adaptive systems with their own foci. However, addressing...
Business process modeling and enactment approaches for services compositions provide a way to coordinate the activities performed by de-centralized entities such as web services. As business needs change, the defined processes supporting the business also need to change and adapt, giving rise to the need for flexible business processes. However, a service composition is a collaborative environment...
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