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Nowadays, datasets grow enormously both in size and complexity. One of the key issues confronted by large-scale dataset analysis is how to adapt systems to new, unprecedented query loads. Existing systems nail down the data organization scheme once and for all at the beginning of the system design, thus inevitably will see the performance goes down when user requirements change. In this paper, we...
Participatory Sensing is an emerging application paradigm that leverages the growing ubiquity of sensor-capable smart phones to allow communities carry out wide-area sensing tasks, as a side-effect of people's everyday lives and movements. This paper proposes a decentralized infrastructure for supporting Participatory Sensing applications. It describes an architecture and a domain specific programming...
A Vehicular Ad Hoc Network (VANET) not only experiences highly mobile and frequently disconnected, but may also have to deal with rapid changes of network topologies, especially when accidents and road traffic jams happen. In this paper, we propose a novel approach to address this issue. Due to the intermittent connectivity in VANET, we adopt the idea of carry and forward, where a moving vehicle carries...
It is being envisaged that a wide variety of applications can be running on vehicular ad hoc networks (VANETs) in the near future. The coexistence of these applications suggests that they will be competing for the use of the wireless medium. That easily leads to severe congestion and even “hotspot” problem in high traffic density urban areas, and results in the failure of time-critical applications...
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