Tetsuo Yamabe

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This paper describes a context information acquisition framework for a personal device that equips a variety of sensors. The framework captures context information about a user and his/her surrounding environment; and the information is used to adapt the behavior of applications running on the personal device. Our framework adopts the blackboard(More)
Economic incentives are a powerful way of shaping consumer behavior towards more commercially efficient and environmentally sustainable patterns. In this paper, we explore the idea of combining pervasive computing techniques with electronic payment systems to create activity-based micro-incentives. Users who consume additional resources by e.g., occupying(More)
While pervasive technologies explore new gaming styles, traditional games, such as cards and tabletop games are still appealing and have various irreplaceable flavors. We point out that tangible game objects and spatial interactions amplify emotional impacts in gaming; and the advantage cannot be reproduced in completely digitalized games. Thus we propose(More)
Context-awareness is one of the exciting research topics in a ubiquitous computing environment, which is expected to create some new business and/or services by using sensors and actuators. Especially, context information from cyber space allows a system to extend its information space both temporalily and spatially. However, many applications do not regard(More)
In this paper we propose a novel approach to persuasive technology, based on children-parent interaction, to be implemented in a smart pad ludic application; to contribute to the natural resource consumption problem, not only by raising awareness, but by encouraging informed decisions on their use. We conducted a survey to see which natural resources are(More)
The usability of mobile services is degraded while moving, since users cannot pay enough attention to the services in such dynamic and complicated mobile environments. Mobile and wearable services should be appropriately designed to handle human factor issues, otherwise fine user experiences cannot be offered. In this paper, we discuss design issues in(More)
Implementing an electronic payment system involves striking a balance between usability and security. Systems that allow payments to be completed with little effort on the part of the consumer, such as smart cards, carry a higher probability of incorrect payments. Systems that eliminate the possibility of incorrect payments by requiring explicit approval(More)