Publications (2)0 Total impact
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Conference Proceeding: Life Microscope: Continuous daily-activity recording system with tiny wireless sensor
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ABSTRACT: A continuous daily-activity recording system called ldquolife microscoperdquo is developed. Acceleration waveform data is acquired without any data loss for a week with a 150-mAh battery. This is made possible by two novel techniques: ldquocool senserdquo and ldquosafe packetrdquo. Cool sense reduces power by 98% during continuous sensing at frequencies such as 20 Hz by using a millisecond time-scale sleep. Safe packet ensures lossless data acquisition with low-cost storage and efficient data compression in wireless environments with interference. In our experiment using the life microscope system, we recorded lossless activity data of 20 participants for more than 4 months.Networked Sensing Systems, 2008. INSS 2008. 5th International Conference on; 07/2008 -
Conference Proceeding: A 15 -- 15 mm, 1 µA, reliable sensor-net module: enabling application-specific nodes.
Proceedings of the Fifth International Conference on Information Processing in Sensor Networks, IPSN 2006, Nashville, Tennessee, USA, April 19-21, 2006; 01/2006
Institutions
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2006
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Hitachi, Ltd.
Tokyo, Tokyo-to, Japan
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