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With the abundance and ubiquity of mobile devices, a new class of applications is emerging, called participatory sensing (PS), where people can contribute data (e.g., images, video) collected by their mobile devices to central data servers. However, privacy concerns are becoming a major impediment in the success of many participatory sensing systems. While several privacy preserving techniques exist...
The constant advent of powerful mobile devices has raised the potential of building novel context-aware applications. These applications let the users enjoy a better experience by sensing their context and automating tasks that would otherwise require significant user attention. This paper presents two context-aware applications, built on top of the MUSIC middleware's context management framework...
The “Web of Things” vision promotes the integration of smart devices into web, using web technologies and protocols as underlying interaction mechanisms with smart devices. Technically many phones include various sensors and provide a large-scale sensing platform. To make this functionality available to a large number of (web) developers our research aims at easing the creation of applications that...
Dissemination of context data from context producing entities to context consuming entities is a fundamental functional task of context aware systems. Broker based approaches have been successfully demonstrated in a number of prototype context-aware systems. With the increase in sensing capabilities of mobile devices, such devices are not merely consumers of context information any more but also have...
This article describes several technical aspects of mobile devices, sensor networks, web technologies, multimedia applications, and context sensitive services in information systems for museums developed at the author's university. Additionally, this paper describes several ideas and techniques of Green IT. It examines key features of the technologies and the systems, shows multiple methods of using...
The typical scenario of a user seeking information on the Web requires significant effort to get the desired information. In a world where information is essential, it can be crucial for users to get the desired information quickly even when they are away from their desktop computers. The Context-Aware Browser for mobile devices senses the surrounding environment, infers the user's current context,...
There are several radio access technologies providing connectivity for mobile devices. In the future, more and more mobile devices will be capable of supporting more than one access technology. For being able to use these technologies simultaneously, there is a need for multihoming capabilities. Due to the variety of access technologies and the ability to use them simultaneously, new concepts for...
Ubiquitous computing has gained momentum over the last years with the expansion of mobile devices. One area of pervasive computing is context-aware systems which are applications designed to react to the constant changes in the environment. This paper presents a context aware platform that handles context acquiring, processing and service provisioning management. The platform alleviates the process...
In this paper we introduce a novel scenario for environmental sensing based on the combination of simple and cheap RFID-based sensors and mobile devices like mobile phones with integrated RFID readers. We envision a system that exploits the availability of these devices to cooperatively read sensors installed in the environment, and transmit the data to a server infrastructure. To achieve quality...
This paper presents research and development of dedicated system architecture, designed to enable its users to interact with each other as well as to access information on points of interest that exist in their immediate environment. This is accomplished through managing personal preferences and contextual information in a distributed manner and in real-time. The advantage of this system is that it...
In this article, I introduce the exciting paradigm of citizen sensing enabled by mobile sensors and human computing - that is, humans as citizens on the ubiquitous Web, acting as sensors and sharing their observations and views using mobile devices and Web 2.0 services.
In pervasive environments, users can potentially access a variety of services through their mobile devices. However, in order to use the new services, we need to adapt the functionality of these devices. To achieve it, we propose to load a bootstrap into them that is able to communicate with the services. However this bootstrap has to be adapted due to the diversity of services offered in the environment,...
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