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모아레, 스타버스트 현상이 없는 터치스크린 패널용메탈 메쉬 설계
신동균,박종운,서화일 한국반도체디스플레이기술학회 2014 반도체디스플레이기술학회지 Vol.13 No.1
Using a ray tracing simulation, we have investigated the moiré and starburst phenomena of touch screen panels (TSPs) based on opaque metallic grids (square, hexagonal, and random grids). It is demonstrated that employing a random metal mesh is the most effective way to suppress the moiré and starburst phenomena at the same time. At high crossing angles between metal mesh of TSPs and black matrix (BM) of displays, however, a random metal mesh brings in stronger moiré phenomenon than a square metal mesh due to point defects. Though the square metal mesh suppresses the moiré effect substantially at high crossing angles, yet it results in the strongest starburst patterns. We have also provided the simulation scheme that can capture the moiré and starburst patterns observed experimentally and useful design guidelines for metal grids.
Causes of Earnings Volatility and Risk Sharing
신동균 한국경제학회 2011 The Korean Economic Review Vol.27 No.2
This paper investigates the causes of volatility of household heads’ earnings, evaluates the extent to which variability of the heads’ earnings is translated into changes in household consumption, and, in the process, identifies effective measures of smoothing idiosyncratic earnings variation. Analysis, based on the Panel Study of Income Dynamics (PSID) data,reveals that, although causes of the earnings volatility are multi-dimensional, job separations are closely related with substantial earnings changes. Evidence also shows that estimated volatility in the heads’ earnings is almost entirely smoothed by a combination of various smoothing measures, with the labor supply of other family members being the most effective measure among them. Overall, the current findings suggest that the welfare loss may not be as great as what is suggested by the observed volatility of the heads’ earnings.
신동균,양대륙 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
Simultaneous saccharification and fermentation (SSF) process consists of the enzymatic saccharification and fermentation simultaneously. This study combined saccharification based on modified Michaelis-Menten kinetics and enzyme inhibition kinetics with fermentation based on the Monod equation and cybernetic model. The cybernetic modeling using Brettanomyces custersii identified as a glucose- and cellobiose-fermenting yeast was suitable for describing the sequential growth on multiple substrates. The proposed model improved the previous SSF kinetic model, and testified the validity of the cybernetic model for correlating with previous experimental results.