• 제목/요약/키워드: Cho Ji-Hoon

검색결과 698건 처리시간 0.032초

이중여자 권선형 유도 발전기에 의한 풍력발전시스템의 동특성 해석 (Dynamic Analysis of Doubly-Fed Induction Generators for Wind Power Applications)

  • 장석명;최장영;조한욱;박지훈;윤기갑
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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    • pp.1183-1184
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    • 2006
  • Using the MATLAB/SIMULINK, this paper presents dynamic simulation model for 6MW wind power generation systems with the DFIG considering distribution systems and performs the dynamic analysis of wind power systems

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500kVA급 3-Level 하이브리드 무정전전원장치 개발 (The development of 500kVA 3-Level Hybrid UPS)

  • 변용섭;김지수;임승범;조영훈
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2015년도 추계학술대회 논문집
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    • pp.197-198
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    • 2015
  • 본 논문은 에너지저장(ESS : Energy Storage System) 기능을 갖는 500kVA급 3-Level 하이브리드 무정전전원장치(UPS : Uninterruptible Power Supply)에 관한 것으로 평상시 무정전 전원장치의 기능을 수행하다 전력 부족시 또는 첨두부하시 에너지저장 기능을 제공하는 기술에 대한 내용이다. 실험을 통하여 제안한 시스템의 우수성을 검증한다.

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4차 산업시대 국가별 표준과 동향 (A Trend Analysis of Global Standards for the Era of 4th Industrial Revolution)

  • 신완선;이성훈;김지원;조지훈;박수진
    • 품질경영학회지
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    • 제45권4호
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    • pp.611-628
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    • 2017
  • Purpose: This paper deals with establishing Korean national standardization policy through a comparative trend analysis of national standardization strategies and each nation's policy environment. It first investigates the standardization strategies including Korea, the United States, Japan and Germany which is currently leading the 4th Industrial Revolution. Methods: This study compares and analyzes national standardization policies that synthesize the determinants of national standard activities using the STEEP, PEST analysis used for policy environment analysis, and National Standardization Model Canvas(N-STD Model Canvas) applying business model canvas. Results: This study confirms the reasoning and operating system of establishing national standard strategy reflecting the social, economic and political situation and the direction of national standard strategy. Conclusion: Based on the results, this study summarized the policy decision factors necessary for establishing the national standard policy and suggested the management plan in the midpoint of view.

자동차 페인트 도장공에서 발생한 과민성 폐렴 1예 (A Case of Hypersensitivity Pneumonitis in an Automobile Paint Sprayer)

  • 오미나;조명진;백훈기;조기성;강지훈;김영;곽진영
    • Tuberculosis and Respiratory Diseases
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    • 제65권6호
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    • pp.541-545
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    • 2008
  • 페인트, 가구 도장제 등에 포함된 Isocyanate는 직업성 천식의 흔한 원인물질로 알려져 있고, 과민성 폐렴을 일으키기도 한다. 저자들은 6개월간 자동차 공장 페인트 도장공으로 일한 중국인 노동자에서 isocyanate에 의한 것으로 추정되는 과민성 폐렴 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

Facelift incision and superficial musculoaponeurotic system advancement in parotidectomy: case reports

  • Kim, Il-Kyu;Cho, Hyun-Woo;Cho, Hyun-Young;Seo, Ji-Hoon;Lee, Dong-Hwan;Park, Seung-Hoon
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제37권
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    • pp.40.1-40.7
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    • 2015
  • Surgical procedures for parotidectomy had been developed to gain adequate approach, prevent morbidity of nerve, and give esthetic satisfaction. We performed two cases of parotidectomy through facelift incision. One case was reconstructed with superficial musculoaponeurotic system (SMAS) flap and sternocleidomastoid (SCM) muscle rotated flap at the parotid bed. In second case, same procedures were performed, but collagen membrane was additionally implanted for prevention of Frey's syndrome. After surgery, two cases showed esthetic results without neck scar and hollow defect on parotid bed area.