Chung-De Chen

  • Citations Per Year
Learn More
Glucocorticoids (GCs) are often prescribed in clinics but many adverse effects are also attributed to GCs. It is important to determine the role of GCs in the development of those adverse effects. Here, we investigated the impact of GCs on trivalent chromium (Cr) distribution in animals. Cr has been proposed to be important for proper insulin sensitivity,(More)
The objective of this study is to develop and analyze a nonlinear suspended energy harvester (NSEH) that can be mounted on a rotating wheel. The device comprises a permanent magnet as a mass in the kinetic system, two springs, and two coil sets. The mass vibrates along the transverse direction because of the variations in gravitational force. This research(More)
This study presents a novel design for a two-axis scanning device driven by lead-zirconate-titanate (PZT) ceramic. The proposed device consists of a scanning mirror and a Y-shaped piezoelectric actuator. The scanning mirror was fabricated using an MEMS process involving three masks. Experimental results show that the fast and slow frequencies at resonance(More)
Harvesting kinetic energy from the environment is an ideal alternative to traditional electrochemical batteries as a power source for low-power electronics such as pressure sensors and thermometers. A tire pressure monitoring system (TPMS) is a key device in preventing a flat tire, which is one of the most frequent causes of car accidents. The U.S.A.,(More)
In this paper, a novel design for two-axis MEMS scanning mirror driven by a single PZT is presented. For fast scan, the bending moment of the actuator is transferred to torque of the fast torsion bars. An offset is introduced in the present design so that the torsional vibration of the slow scan can be excited by a vertical displacement of the actuator. A(More)
This paper aims at the novel approach to establish the equation of the motion of the piezoelectric energy harvester. The energy harvester is composed of three beams, two masses and two joints. Each joint is modeled as a spring and a damper. Since two of the three beams are identical in geometry and deflection, the device is actually a 2-DOF vibration system(More)
  • 1