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In this paper, we study a pattern-context-aware scheme for stereo pattern analysis.Depth and texture are chosen as two primary factors for the pattern-context- aware computing.We organize these patterns as a context to analyze.A knowledge-based inference system is built with human experience to model the correlation of the context and processing. The process for the pattern analysis could recognize...
Ambient intelligent services often need to be executed at computing devices whose computational resources are limited. To solve this problem, such services intensive tasks should be offloaded to cloud computing. However, there is a gap between access control models in ambient intelligent services and cloud computing, where the former tends to be context-dependent and the latter to be subject-based,...
Recently, interaction with computer applications in a pervasive environment has increasingly benefited from mobile technologies. These technologies generally attributed to the environments of physical and social properties. Therefore, the adoption of these technologies ensures more flexibility and creates new forms of use. The consideration of the context of use in pervasive interactive applications...
Offloading context-aware services with intensive tasks to cloudcomputing infrastructures is useful. However, we have a problemresulting from differences between context-centric access controlmodels for pervasive computing and subject-based access control modelsfor cloud computing. To solve this problem, this paper proposes alocation model for spatially specifying containment relationships ofpersons,...
Mobile context-aware computing is an essential component of the smart cities infrastructure. Attempts were made to develop a model that can effectively represent a system in device to support context-aware behavior. The purpose of this paper is to identify deficiencies of the previously developed model and propose solutions to improve it.
Mobile context-aware computing is an essential component of the smart cities infrastructure. Attempts were made to develop a model that can effectively represent a system in device to support context-aware behavior. The purpose of this paper is to identify deficiencies of the previously developed model and propose solutions to improve it.
The purpose of ubiquitous computing is to make computers and the environment integration as a whole. Pervasive Computing makes computer equipment that can sense changes in the surrounding environment, and ultimate the computer itself disappears from sight. In the pervasive computing environment at any time, place, people can be in any way acquisition and processing of information. With the development...
Design and development of context-aware Information Systems (ISs) is particularly complex, owing to the increasing dependency of people on computing support for making simple decisions or performing their daily tasks. Thus, the need of designing more attractive, adaptable and proactive systems is persistent. In this paper, we present a state of the art of context-aware approaches that are compared...
Requirements Engineering (RE) represents the most intricate phase in software development process, especially for pervasive applications built on context-aware services (CASs) in which the context can affect requirements engineering process. Many researches that advocate model-driven development have been proposed to design and develop such kind of services. Unfortunately, most of them ignore this...
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...
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...
Privacy is the most often cited criticism of context awareness in pervasive environments. Context aware pervasive applications have the vulnerabilities of capturing extensive portions of users' activities. Whether such data capture is an actual threat or not, users' perceptions of such possibilities may discourage them from using many useful pervasive applications. So far, in context aware pervasive...
Since its inception, Service Orientation allowed for distributed clients to invoke remote operations utilizing standardized protocols, programming paradigms and architectures. Furthermore, the problem of compiling complex service compositions, based on contextual information and user preferences, has been also extensively investigated by the research community. However, these techniques are mostly...
In this paper, we propose a process calculus, Context-aware System Calculus (CSC), in order to describe context-aware systems that can maintain context models and carry out some operations, including requesting context-aware services, according to the context rules. Besides, a context-aware system can also communicate with other systems or receive context information from context providers by sharing...
With the new technological advances and strong move towards Future Internet and Internet as a Platform a new environment is emerging. This environment is generative, social, strongly interactive and collaborative, so users play a fundamental role in it. Business applications are simplifying, webifying and getting more user-centric. In this environment, context and context-awareness plays a fundamental...
Nowadays we can see a new era of mobile computing springing up. Mobile devices more often than not provide incomparably more relevant information and context about their users than was ever available on desktops or within classic web browsing. With this a new branch of research for autonomous software is forming. The aim is to recognize usage situations to let an application decide on performing a...
Context-Aware Computing aims at making computing systems able to capture context information and to adapt to it, providing context-related services and information to users. Context is any information used to characterize in some sense a person, object, or place of interest for a given user or application. Initial definitions of context-aware computing date from twenty years ago, but until now it...
In recent years, new business and research opportunities have been increasingly emerging in the field of large-scale context-aware pervasive systems (e.g. pervasive health-care, city traffic monitoring, environmental monitoring, smart grids). These large-scale pervasive systems are characterized by the need to employ large number of context sources, process massive amounts of real-time context data,...
Large and various amounts of context data related to a user's environment are available from different domains including mobile devices, smarthomes, wearable sensors, and social networking services. These context domains are interconnected and the context data from them can be shared thanks to mobile, pervasive, convergent, and ubiquitous technologies. We can provide user-centric context-aware services...
Unified Modeling Language (UML) is an effective tool to model information systems and to develop effective system specifications. Context Aware systems possess a dynamic behaviour based on parameters such as time and location which makes the task of modelling a context aware system quite complex namely the security requirements of the system. Since UML doesn't provide specific use cases to model Context...
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