Shin-Hyeong Choi

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Energy expenditure of a person closely corresponds to the amount of physical activity. Recently, due to the advance in sensor and electronic technology, we can measure physical activity using portable electronic devices. Smart phones are well equipped with useful sensors such as accelerometers and orientation. In this paper, we present estimation method of(More)
Wireless sensor networks are rapidly growing. Wireless sensor networks are composed of a large number of radio frequency equipped sensor devices that autonomously form networks through which sensor data is transported. These sensor devices are used in various real life applications. Recent advances in wireless communications and electronics have enabled the(More)
Embedded systems are suitable for application system with strict requirements on the functionality, reliability, cost, size and power consumption Also embedded Linux has been widely used to its numerous characteristics, such as open-source, small size, fast speed, and excellent network performance. Therefore, embedded Linux gets more attention and has more(More)
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