Tsung-Yen Chen

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This paper presents the architecture and implementation of an automatic medication dispenser specifically for users who take medications without close professional supervision. By relieving the users from the error-prone tasks of interpreting medication directions and administrating medications accordingly, the device can improve rigor in compliance and(More)
A number of structured peer-to-peer (P2P) lookup protocols have been proposed recently. A P2P lookup protocol routes a lookup request to its target node in a P2P distributed system. Existing protocols achieve balanced routing traffic among nodes by assuming that lookup requests are evenly targeted at every node. However, when lookup requests concentrate on(More)
This paper describes a component model and component-based architecture of smart devices and systems that are designed to enhance life quality and well being of elderly individuals. In addition to providing the traditional view of hardware, firmware and software components, the model also provides developers with an operational view. The view enables the(More)
This paper presents a wireless biosignal acquisition system-on-a-chip (WBSA-SoC) specialized for electrocardiogram (ECG) monitoring. The proposed system consists of three subsystems, namely, 1) the ECG acquisition node, 2) the protocol for standard IEEE 802.15.4 ZigBee system, and 3) the RF transmitter circuits. The ZigBee protocol is adopted for wireless(More)
Advances in networking and microprocessor technology have enabled the development of a variety of small, low-cost, and resource-limited embedded systems. Such an embedded system is often diskless due to the weight, size, and cost of a disk. Because of the availability of inexpensive high-speed network cards, most embedded systems are networked, wired or(More)