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The development process of a project requires verifications that may be handled through expert team. It means that a project cannot be completed in absence of the analysis phase. The analysis and measurement have the strongest reason to prove the accuracy of outcome of the project. As ubiquitous computing is the most probable era for current research, most researchers are working in the contextual...
Domain Specific Modeling (DSM) has gained a lot of research attention, especially concerning costs/time optimization and code quality aspects. On the other hand, CAC (Context Aware Computing) has recently emerged as a new computing paradigm promising adaptable systems development. DSM approach for Context aware service oriented systems (SOS) raises many challenges. Particularly, the challenge of engineering...
After the vision of Mark Wieser, and the advent of 3G connection with a large number of mobile computing devices(PDAs, Smartphones, Tablet, etc.) that have democratized access to information anywhere, we live in a new era of ubiquity where a set of services are offered in our environments. In this work we try to review the conception, discovery and composition of these services called pervasive in...
ITU-T has identified context awareness as a key capability for providing “smartness” in Smart Ubiquitous Networks (SUN). Based on standardization activity for SUN, this paper introduces context awareness for SUN, including functional model and operations as challenges for various networking capabilities using context awareness. It aims to stimulate the development of standards and urgent technical...
An important challenge in pervasive computing environments is to automatically enable software applications by dynamically composing services. Service composition is a way to plan a business process to fulfill business goals that cannot be achieved by individual business services. Given a representation of services in OWL-S, service composition can be modeled as an Artificial Intelligence planning...
Improving autonomous agents' awareness has aroused a great deal of interests in agent research. The objective is to formulate an approach that provides advanced awareness capabilities in the agents' behaviour. In this paper, we explore the techniques proposed in the literature that have been adopted to enable agents' awareness which are Active Perception (AP), Situation Awareness (SA) and Context...
Smart applications rely on middleware abstraction to interact with the environment in order to collect relevant information for context determination. Among the forms of representing context in smart spaces, ontologies have been used because of the possibility of sharing, reusing and also modelling the semantics of context, independent of programming language, operational system and/or middleware...
Service-Oriented Architecture (SOA) is a software paradigm with a uniform means to offer, discover, compose services' capabilities to meet desired effects with measurable performance expectations. While most of today's SOA tools support service process compositions by considering only functional attributes, additional support for composing service processes by non-functional attribute is needed. In...
In ubiquitous computing, context-aware service oriented systems refer to applications that use so-called contextual information to provide appropriate services or relevant information to the user or other applications to perform a specific task. An important challenge in such applications is context modeling, using ontologies to model context information and to reason about context at a semantic level...
This paper is about an optimization method to detect "semantic exceptions" in context aware systems, which means the kind of exceptions considering application semantics. To provide user-friendliness and expressiveness for program developers, in addition to efficiency in detection, intuitive descriptions like "too near()," and "too fast()" are supported, and transformed...
Sensor-rich Context Management Frameworks (CMF) for Ubiquitous Systems should be able to continuosly gather raw data from observed entities (e.g., people, surround enviroment) in order to characterize the current situation (i.e., context). However, the energy of sensors can end up, which reduce the ability of CMF for detecting the current situation, directly affecting the availability of context-aware...
The Internet of Things (IoT) has the potential to transform our daily lives and societies. This is, at least in part, due to its massively distributed and ubiquitous nature. To realize the benefits of the IoT, security and privacy issues associated with the use of the IoT need to be identified and addressed properly. In this paper, our focus is on protecting the privacy of the users of location-based...
Large scale mobile data is valuable for extracting context in open physical world. In this paper, we propose a spatio-temporal context query framework in open space based on GPS data. The framework consists of three parts: GPS data, query engine, and user interface. It aims at providing query for contexts like crowd position and movement. First, the framework adopts status-based indexing method for...
Mobile robots can be an invaluable aid to human first responders (FRs) in catastrophic incidents, as they are expendable and can be used to reduce human exposure to risk in search and rescue (SaR) missions, as well as attaining a more effective response. Moreover, parallelism and robustness yielded by multi-robot systems (MRS) may be very useful in this kind of spatially distributed tasks, which are...
The vision of autonomic computing involves distributed nodes capable of managing and preserving themselves. In practice, autonomic computing is also strongly connected to the concepts of mobility and platform heterogeneity since next generation networks assume different types of mobile nodes that operate inside ad hoc environments. In such cases where the context changes can be frequent, the capability...
This paper reports on a user study to gauge user interaction with RSS based mobile electronic updates from a Moodle based virtual learning environment. The electronic updates can be received in three dimensions of context: time, location and activity. The study aims to compare and evaluate the effectiveness of these context dimensions by comparing the level of user engagement. The mobile updates relate...
In recent years, the advances of computer, network and sensor technologies promote the research and development of context-aware system greatly. Service logics in context-aware system should be correct and reasonable to make sure the system provides user satisfied services. In this paper, we propose a context-aware system modeling methodology based on Timed Colored Petri Net (Timed CPN) to check the...
The second devices like tablet PCs give additional contextual information to the user while watching TV in a home network environment. With the growing number of smart devices produced in the last few years, we also need to provide users good user experiences when they use individual second device. In this paper, we propose a framework for context-awarable user interfaces of the second screen devices...
Several frameworks have already been proposed to simplify the development of context-aware applications. These frameworks are focused on collecting and publishing contextual data, and on providing common semantics, definitions and representations of these data. This implies that applications share the same semantics, which limits the range of use cases where a framework can be used since that assumption...
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