A Study on Optical Efficiency Improvement of LED-Lighting Adopting Aspherical Optical System(1) Hak Suk Lee, Jong Rak Park, Min Jae Kim, Hye Jeong Kim, Jeong Ho Kim Journal of Korean Institute of Electrical and Electronic Materials Engineers.2009; 22(12): 1033. CrossRef
Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination Jae-Jun Park The Transactions of The Korean Institute of Electrical Engineers.2012; 61(10): 1461. CrossRef