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연료전지응용을 위한 높은 승압비와 낮은 전류리플을 갖는 무변압기형 부스트컨버터
박찬기(Chanki Park),양진영(Jinyoung Yang),김형준(Hyungjoon Kim),최세완(Sewan Choi),주리아(Ria Ju),김현(Hyun Kim) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
연료전지로부터의 낮고 변동폭이 큰 전압을 안정되게 승압시키기 위하여 부스트 컨버터가 사용되고 있으며 전기적인 절연이 요구되지 않는 응용에서는 손실, 가격 및 부피 상승의 원인이 되는 고주파변압기가 없는 무변압기형의 부스트 컨버터가 장점을 갖는다. 본 논문에서는 6~8배의 실제 사용 가능한 승압비를 가지며 입출력 전류리플이 매우 작은 새로운 무변압기형 부스트 컨버터를 제안하고 모의실험을 통하여 그 타당성을 검증한다.
박찬기(Park ChanKi) 한국중동학회 2016 韓國 中東 學會 論叢 Vol.37 No.1
The main purpose of this article is to analyze the Sykes-Picot Secret Agreement and its relation to nation-building in Lebanon and Syria. During the period of the First World War, three contradictory promises, including the Hussein-McMahon Correspondence, the Sykes-Picot Secret Agreement, and the Balfour Declaration were made by Britain with Arabs, Jews, and the French. Among these three, the Sykes-Picot Secret Agreement became the cornerstone of the subsequent division of the Levantine region into a series of separate nations after the war. This agreement was designed by Mark Sykes and François Georges-Picot, without considering the aspirations of the native people. According to their Imperial interests, Britain and France started to build artificial nations in their mandatory regions, but the new nations lacked basic conditions required for development into viable nations. As a result, political instability in these nations continues to exist until today. This paper also found that the difference between British and French colonial attitudes toward the Arab World affected the successes and failures of nation-building. The British was more cooperative with the local people, while the French employed more repressive measures to rule the natives. Due to these differences, nations built by the British have been more stable and peaceful, whereas nations built by the French, such as Lebanon and Syria, have experienced a greater deal of political instability and faced many difficulties after independence.