Tsung-Yen Chen

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Clinical evidence suggests that nicotine reduces anxiety in stressful situations. In the present study, we investigated the effect of nicotine on restraint-enhanced anxiety-like behavior, c-Fos expression, an index of neuronal activation in the brain, and plasma corticosterone. Two-hour restraint stress-enhanced anxiety-like behavior in the elevated(More)
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)
This paper describes the UCAADS simulation environment and the underlying UCAADS model that have been developed for the purpose of evaluating the correctness and performance of UCAADS and user-device interactions. The acronym UCAADS stands for user-centric automation and assistive devices/systems and services. Examples of UCAADS are medication dispenser,(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)