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Browsing by Author "Won-Sik Oh"

Browsing by Author "Won-Sik Oh"

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  • A Study on the Equivalent Model of an External Electrode Fluorescent Lamp Based on Equivalent Resistance and Capacitance Variation 
    Kyu-Min Cho; Won-Sik Oh; Gun- Woo Moon; S. S. Murthy; Mun-Soo Park; Sang-Gil Lee (The Korean Institute Of Power Electronics, 2007-01)
    An External Electrode Fluorescent Lamp (EEFL) has longer lifespan, higher power efficiency and higher luminance than a Cold Cathode Fluorescent Lamp (CCFL). Moreover, it is easy to drive them in parallel. Therefore, the ...
  • A Three Phase Three-level PWM Switched Voltage Source Inverter with Zero Neutral Point Potential 
    Gun- Woo Moon; Seong-Wook Choi; Sang-Kyoo Han; Won-Sik Oh (The Korean Institute Of Power Electronics, 2005-07)
    A new three phase three-level Pulse Width Modulation (PWM) Switched Voltage Source (SVS) inverter with zero neutral point potential is proposed. It consists of three single-phase inverter modules. Each module is composed ...
  • SEM을 이용한 천연모 표피의 형태 분석 
    박원석; 이오택; Choi Mi Jung; Won-Sik Oh; Byoung-Ho Kang; 류일녕; Choi， Sung-Woon; PARK SUNG WOO (The Korean Academy of Scientific Criminal Investigation, 2011-09)
    법과학 분야에서 수모 또는 인모의 현미경을 이용한 미시적 형태분석은 사건해결에 중요한 정보를 제공해 준다. 털은 주성분이 α-케라틴이며 세가지 형태학적인 영역 모표피, 모피질, 모수질의 3층으로 구성되어 있다. 본 연구는 SEM을 이용하여 모피제품으로 쓰이는 수모 20종을 시료로 분석을 한 결과 모표피층 형태학적 특성인 scale의 패턴은 비늘모양, 가시모양, 왕관모양으로 크게 분류 되었고 ...

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