The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A person's level of physical fitness can affect their health and many other factors in their lives. However, little is known about the effect of physical fitness on factors relevant to virtual environments. Towards addressing this knowledge gap, we performed a research study examining the relationship of several physical fitness measures with performance, presence, and simulator sickness during use...
Ubiquitous Information Systems (ISs) should support mobility of users and reason efficiently on their context to provide relevant and real-time information. ISs should be particularly adaptive and context-aware by managing and responding properly to occurring events. A need of integrating an adaptive and distributed event based system raises to lead to a diversity of proposed approaches and architectures...
Ambient Intelligence environments consist of various devices that collect, process, change and share the available context information. The imperfect nature of context, the open and dynamic nature of ambient environments, and the special characteristics of the involved devices have introduced new research challenges on how to represent and reason with contextual information. Previous work presented...
This article presents Collect&Drop application, a pervasive system which utilizes RFID technology to store and pick digital content with mobile phones and play it with smart space's displays and speakers. Collect&Drop is implemented with the support of three reasoning engines, based on CLIPS, Jess and Win-Prolog. We discuss advantages and drawbacks of integrating a reasoning engine into the...
Context is important in personal knowledge and social knowledge construction process. Context awareness means being able to collect environment and learning resource information from the learner and surrounding equipment to provide learners with the context-related learning activities and content. The context elements, including intra object, inter-object, session, social systemic, economic techno-physical...
Nowadays configuration parameters about network and service in intelligent terminals are getting more complex. Faults and security risks in the terminal are increasing. These have become key holdbacks for usage of services. So it is necessary to manage the terminals to keep them normal and promote satisfaction from customer. OMA and 3GPP have done researches about management of terminals. But there...
Emerging technologies like mobile and wireless communication are offering promising opportunities to enable mobile healthcare delivery to citizens. But, enhancing the quality of service of such systems demands systematic improvement of existing service infrastructure. In this paper, we describe a context information refinement architecture proposed to address the shortcomings of existing works in...
The European2228319 research project ??C-Cast?? (context-aware content casting) aims at providing an end-to-end system design for context-aware services and content provisioning. The project does not limit itself to reasoning but embraces also efficient service provisioning to user groups detected and formed according to the inferred user context. This paper presents the architecture components related...
Service-oriented architecture (SOA) is a new paradigm, where it is imperative to automatically adapt to the changing context in the environment. This paper applies context awareness to service-oriented architecture to build reusable, adaptable, spontaneous and flexible context-awareness systems. We develop an ontology based context model, and domain-analyst oriented context reasoning rules, which...
In this contribution, a real experience of rapid design and deployment of context-aware services for an exhibition hall is detailed. The prototype has been built on a combination of a commercial system (which has been customized and improved to satisfy the prototype needs) with an in-home developed context acquisition framework. In order to partially overcome device fragmentation issues, we have focused...
In a generic semantic-based matchmaking process, given a request, it is desirable to obtain a ranked list of compatible services/resources/profiles in order of relevance. Furthermore, a match explanation can provide useful information to modify or refine the original request in a principled way. Though the feasibility of such an approach has been proved with fixed reasoning engines, it is a challenging...
Applications in context-aware computing continuously change their operations based on sensor data or services provided by various physical spaces in the real world, such as persons, shops and homes. We propose a gateway framework for physical spaces in this paper, which serves as a middleware platform for context-aware applications to access data from sensor networks deployed in these spaces. The...
Today's mobile users have access to a wide range of Web-based services. This paper presents our m-Tableaux algorithm for enabling cost-efficient and optimised semantic reasoning to support pervasive service discovery. We present performance evaluation of the m-Tableaux optimisation strategies which clearly demonstrate its operational feasibility on a mobile device.
One of the goals of mobile and ubiquitous computing is to enable ad-hoc interactions between different kinds of entities to help end-users perform different kinds of tasks. These entities, which include devices and services, may either be mobile or situated in the surrounding physical environment. However, these interactions require the use of rich semantic models describing the capabilities of the...
As ubiquitous virtual reality (U-VR) systems become more and more popular and several systems coexist all together, sharing events between them in order to improve the user experience and increase their scope and functionality will be mandatory. Since U-VR systems have a dynamic and decoupled nature, and they have their own event model, we propose in this paper a semantic publish/subscribe infrastructure...
Over the past 20 years, a lot of effort has gone into making the vision of ubiquitous computing a reality. A major focus of this effort has been on the understanding of human activity as input to enable the design and implementation of context-aware applications. Context-awareness is a vital enabling technology for ubiquitous virtual reality applications. However, it is only recently that we have...
In this paper we present a knowledge-driven model for mobile learning based on the semantic Web. The knowledge model uses a global ontology space and a unified reasoning mechanism to integrate and aggregate knowledge describing both system-centric and user-centric context information. The reasoning engine perceives, understands, and translates context changes into new adaptation constraints in the...
In this paper, we study how to exploit the context-awareness in augmented reality (AR) applications to take advantage of the context in both the high-level and low-level processing. We propose an AR system architecture that works with a context-awareness framework. In the system, both the preliminary and the final context is provided to the process that needs the context. We provide two scenarios...
The "amount" of knowledge is constantly growing. Technological advances more and more facilitate an access to knowledge in an anytime, anywhere, and anyhow manner. The provision of accurate knowledge with respect to a requester's context gets more challenging. Explicit coordination of knowledge can be one means to address such developments. This report summarises several works and discussions...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.