Lee S.I. – TechConnect Briefs

Transient Analysis on Nonlinear Model of Electrostatically Actuated Nanomechanical Switch

Kim I.K., Han D.H., Lee S.I., University of Seoul, KR

This research predicted the transient behaviors of a nano-switch with static and dynamic analysis. The nano-switch consists of a cantilevered MWCNT incorporating the electrostatic forces and intermolecular attractive and repulsive forces between the CNT and [...]

Topology Optimization of Ultrasonic Transducers for Microsystem and IC Packaging

Kim J-M, Kim J-S, Kim J-M, Kim J-S, Lee S.I., Lim E.J., University of Seoul, KR

In this study, we introduce the method of topology optimization for piezoelectric transducers including ultrasonic tool horns for flip chip or wire bonding. Topology optimization performs an optimization with the objective function regardless of initial [...]

Propagation and Emissions of Ammonia-substituted Hydrogen/Air Flames

Lee J-H., Lee S.I., Lee J-H., Lee S.I., Kwon O.C., Sungkyunkwan University, KR

In order to evaluate the potential of partial ammonia (NH3) substitution to improve the safety of hydrogen (H2) use in general and the performance of internal combustion engines in particular, the propagation, development of surface [...]