• 제목/요약/키워드: ChoiIn-gyu

검색결과 3,093건 처리시간 0.037초

상전도 부상 시스템의 부상 Magnet 설계에 관한 연구 (A Study on the Design of Magnet of Electromagnetic Levitation System)

  • 임달호;최창규;김규탁;신명호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1990년도 하계학술대회 논문집
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    • pp.28-31
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    • 1990

  • Electromagnetic levitation system became power-full because of Its high speed, safety, reliability, and so forth So, in this paper, various characteristics of magnet in electromagnetic levitation system were analyzed by Finite Element Method and its design parameters were proposed by simulation results.

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RPWM 기법을 이용한 능동클램프 ZVS 플라이백 컨버터 전도노이즈저감 (Conducted Noise Reduction in Active clamp ZVS flyback converter using Random Pulse Width Modulation)

  • 김영규;최태영;원충연;김재문;김규식;최세완
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2002년도 전력전자학술대회 논문집
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    • pp.498-501
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    • 2002

  • In the conventional PWM converter, high-frequency switching techniques was used for high-density of energy, but occurred a lot of problems such as switching losses, switching voltage/current stresses, EMI(Electromgnetic Interference) and so on. To overcome these problems, various soft switching techniques have been presented. However these techniques are focused on reducing switching losses and voltage/current stresses . The simulation and experimental results are shown that the active clamp ZVS flyback converter with the proposed RPWM(Random Pulse Width Modulation) technique reduces the conducted noise.

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NMR Study of Temperature-Dependent Single-Stranded DNA Binding Affinity of Human Replication Protein A

  • Kim, Min-Gyu;Shin, Tae-Hoan;Choi, Seo-Ree;Choi, Jae-Gyu;Lee, Joon-Hwa
    • 한국자기공명학회논문지
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    • 제20권3호
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    • pp.66-70
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    • 2016

  • The replication protein A (RPA), is a heterotrimer with 70, 32 and 14 kDa subunits and plays a crucial role in DNA replication, recombination, and repair. The largest subunit, RPA70, binds to single-stranded DNA (ssDNA) and mediates interactions with many cellular and viral proteins. In this study, we performed nuclear magnetic resonance experiments on the complex of the DNA binding domain A of human RPA70 (RPA70A) with ssDNA, d(CCCCC), at various temperatures, to understand the temperature dependency of ssDNA binding affinity of RPA70A. Essential residues for ssDNA binding were conserved while less essential parts were changed with the temperature. Our results provide valuable insights into the molecular mechanism of the ssDNA binding of human RPA.

  • https://doi.org/10.6564/JKMRS.2016.20.3.066 인용 PDF KSCI