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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...
Smartphones are powerful mobile devices in terms of processing speed and data traffic. These devices assist users in everyday tasks and are highly personalized. To provide good use experience and low energy consumption, it is important that it behaves according to the users' current context. It is known that when a device is active, the screen is responsible for 16% of total power consumption. In...
In daily life, people have to perform a large number of activities typically in a limited amount of time. Accordingly, they may benefit from help and guidance provided by support systems in order to accomplish these activities accurately and in the correct order. In order to satisfy such needs we develop a software framework which also incorporates a mobile application. Within the framework, workflows...
Social networks connect people while internet of things platforms connect things. Although both platforms use various communication tools in efficient ways, platforms for things often don't communicate and interoperate with social networks. As a consequence, there is a lack of unified programming interfaces and platforms to enable internet-based interactions between people and things. This hinders...
The evolution of mobile technologies allows the emerging of ubiquitous systems, able to anticipate user needs and to seamlessly adapt to context changes. These systems present the problem of dynamic adaptation in a highly distributed, heterogeneous and volatile environment, since it may be difficult to collect and process context information from distributed unknown sources. In order to facilitate...
Care processes in healthcare organizations are very complex and difficult to define precisely in advance. Furthermore, a specific process for the same disease can vary according to the characteristics of a patient and his or her situation at hand. In order to provide personalized healthcare services to patients, it is essential to identify the context of the patients. This paper presents an integrated...
An ultimate penetration of communication technologies allowing web access has enriched a conception of smart homes with new paradigms of home services. Modern home services range far beyond such notions as Home Automation or Use of Internet. The services expose their ubiquitous nature by being integrated into smart environments, and provisioned through a variety of end-user devices. Computational...
In the development of context-aware applications it is important the existence of applications/platforms that are responsible for the discovery and processing of context information and make it available to be used by these applications. This work presents an autonomous system for characterizing the context of a public place with information about its location, environmental conditions and the nature...
The growing adoption of smart mobile devices, such as smart phones and tablets, is fundamentally changing the way how business is conducted. New mobile technologies exert a significant influence on individuals, organizations, and society at large. Our paper provides an analysis of empirical research on mobile computing in the information systems literature. The mobile computing paradigm has been used...
This article tackles the problem of supplying the low level commanders with information from information sources located on higher command levels, distributed using web services, the most commonly used technology in modern command and control systems. There has been proposed the Adaptation Framework For Web Services Provision (AFRO) that defines a mechanism for effective web services invocation in...
The Web has rapidly evolved from a static informational medium into a highly capable interactive application platform. Today, Web browsers have become the de facto interface for many networked applications; however, conventional Web browsers are still unable to directly interact with the broad range of context sources and actuators available in highly heterogeneous mobile environments. In our Ambient...
In this paper we present a view of EXEHDA middleware and a novel service created for dynamic adaptation. EXEHDA is service-oriented, adaptive and was conceived to support the execution of ubiquitous applications. The main concept in the proposed design for the middleware and for the application is context awareness expressed in an adaptive behavior. The middleware manages and implements the follow-me...
Ubiquitous computing (Ubicomp) environments are characterized by high distribution, heterogeneity and dynamism. In these environments, applications must be aware of their contexts and adapt to changes in them. A major research challenge in the area of Ubicomp is related to context awareness. Considering the characteristics of ubiquitous environments, this paper presents an architecture for context...
Ultimate goal of ubiquitous computing is to move computers away from the user's focus, by embedding them into the environment. The user will be surrounded by smart and internet powered devices. In this work we describe our research about the Smart Home system. Our solution contains all sorts of smart entities necessary at home. For the interaction with the user we defined two outputs: Smart Wall and...
In this paper we present CLIO an urban computing system used to form and interact with the collective city memory, formed by shared citizens' recollections. Our goal has been to study the impact of such a system on the urban culture and in particular how it alters the city, the perception of people about the city and the communication among people. We applied CLIO and conducted user studies in two...
The idea presented in paper is inspired from the wide prospect given by the integration of fuzzy sets and linguistic quantifiers in the modeling of context and quantification of similarities measurement. In pervasive services retrieval, dealing with context in a flexible and efficient way is extremely important. In this paper we propose a practical classification of context into functional and non...
In this paper, we describe the context of interest as linking functionality for ubiquitous VR and discuss how to apply it in the ubiquitous VR environments. We first explain a ubiquitous VR environment and its features. Then we present the context of interest as a linking method for making ubiquitous VR environments. This paper illustrates ubiquitous VR as realizing mirrored VR in ubiquitous computing-enabled...
This paper extends a proposed new approach to deal with smart objects or smart mobile devices by proposing a middleware framework inspired by RNA mechanisms in molecular biology. This framework represents complex application scenarios of proximity-based federation of smart objects as catalytic reaction networks. Each catalytic reaction is modeled as an RNA expression from a DNA. We introduce smart...
Despite 20 years of research, ubiquitous systems have yet to become truly ubiquitous. A key challenge is the design for volatility and evolution experienced when those systems are deployed in more than one environment as well as for a substantial time period. The work presented here describes a proposed federated System of Systems (SoS) engineering approach for creating ubiquitous systems based on...
In ubiquitous computing system, the increasing mobile and dynamic of software and hardware resources and frequentative interaction among function components make fault-tolerant design very challenging. In this paper, we propose a context and policy based self-adaptive fault-tolerant mechanism for a mobile ubiquitous computing environment such as a mobile ad hoc network. In our approach, the fault-tolerant...
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