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Personal health care is a promising application of a body area network (BAN). The BAN for health care application consists of a data collector and multiple wearable sensors that send data to the collector according to a sampling interval determined by the application. The data collector may be any hand-held or portable device such as a mobile phone, a PDA or a wristwatch. An individual user needs...
Portable sensory devices carried by humans - which are referred to as human probes - facilitate easy-to-use sensing and monitoring of urban areas. However, when each human probe individually senses and transmits information, the sensing activity is inefficient in terms of energy consumption. In this paper, we propose an architecture of quality-enhanced urban information blending and aggregation (Aquiba),...
In this paper we describe a prototype system of identifying environment condition utilizing signals emitted by people. Many people move around in many places such as urban and mountain areas. If each person emits information about identifying the state of the place where he/she and all the information is collected to one site, we can know the state of an area. Based on the idea, we have extended WINFO,...
Although human activities in the World Wide Web are rapidly increasing due to the advent of many online services and applications, we still need to appraise how things such as a merchandise in a store or pictures in a museum receive attention in the real world. To measure people's attention in the physical world, we propose a Sensor of Physicalworld Attention using Laser scanning (SPAL). It is challenging...
Temperature in a metropolitan area exhibits a complicated tendency. Rather than geographical closeness, structures of a group of buildings and streets can affect changes in temperature. To identify the tendency of fine-grained distribution of temperature, we installed a densely-distributed sensor network called UScan. In this paper we describe a system of UScan and effective placement of sensors based...
GPS equipped mobile devices and the improvement of the technology for sensor networks have enabled location-based services. The location-based services deal with real-world information which is collected from mobile devices and sensors. Due to large amount of collected data, we should manage such data in distributed fashion. This paper proposes a scalable overlay network architecture, called GeoSkip...
Personal healthcare is a promising market of a personal area network (PAN). The PAN consists of a data collector and multiple wearable sensors which must send data to the collector according to the frequency specified by each PAN. The data collector may be any hand-held or portable device, e.g., a mobile phone, a PDA, or a wristwatch. An individual user needs a PAN in order to detect, track, or manage...
Inter-vehicle communication (IVC) protocols have been studied to provide safe and comfortable driving. Each vehicle using the IVC protocols periodically broadcasts its current information (location, moving direction, speed, etc.), and other vehicles must receive such information exactly and in time. Other vehicles use received information to alert, advise, and navigate drivers, helping them become...
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