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Usually, sensor data needs to be disseminated from the source sensors to data collectors (e.g., sink nodes), making those spatially distributed sensor data available for applications to access. The widespread and ubiquitous nature of mobile devices, e.g., PDAs and cell phones around the world, makes them attractive to be used as mobile data collectors (MDCs) to collect and deliver the sensor data...
In this paper, we present a novel method for image annotation and retrieval on mobile device by using contextual information. Image annotation is an effective way for content based image retrieval. However, manual annotation is an expensive and time consuming work, especially for mobile device. Here, we propose a semi-automatic way to give image annotation on mobile device. There are rich contexts...
Recent developments of information technologies are leading the advent of mobile device oriented context-aware applications, which means using context to realize some novel applications on mobile devices. The context-aware application needs a framework for context information management. In this paper, we propose a mobile device oriented framework for context information management to solve the problems...
Although wireless sensor networks (WSN) have been an active field of research for the last so many years, service discovery within WSN has not been considered much by the research community. Service discovery in wireless sensor networks particularly in the context of future ubiquitous computing plays an important role and its significance cannot be underestimated. In this paper, we present a study...
Although wireless sensor networks (WSN) has been an active field of research for the last many years, service discovery within WSN has not been considered much by the research community. Service discovery in wireless sensor networks particularly in the context of future ubiquitous computing plays an important role and its significance cannot be underestimated. In this paper, we present virtual service...
Online community (OC, or termed as "virtual community") provides a social sphere for people to share their information, knowledge and other resources. It is becoming an unprecedentedly ubiquitous online phenomenon. The contents which are jointly provided by participants are considered as public goods (Kollock, 1999). For public goods provided by collective action, there have been many papers...
Utilizing mobile devices such as PDAs, cell phones to collect and deliver sensor data is considered as a promising application in future ubiquitous computing environment. In such application scenarios, the human factor is becoming increasingly important. In this paper, we propose a group-level incentive scheme targeted for encouraging mobile users to collect sensor data. Such idea of widening the...
We can envision that future sensor networks (WSNs) are ubiquitous, large-scale, interconnected, which we call worldwide sensor network (WWSN). Currently, most of the WSNs are working as isolated islands. Without sharing sensor data across different domains, the most important features of ubiquitous computing (e.g. context awareness) will not be easily achieved. For sharing among WWSN, the first nut...
Context-aware mobile computing belongs to the field of ubiquitous computing. It aims to enable device to provide better service for people through applying available context information. In this paper, context-aware mobile computing was elaborated. Firstly, the history of definition of context was summarized, and then the new classification of human-centric context was proposed. The acquiring and...
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