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소형 고체 로켓 추진제의 그레인의 형상 변화에 따른 추력 특성 연구
고태식(Go Tae-Sig),심진호(Jin-Ho Sim),용승주(Seung-Juu Yong),이병길(Byung-Gil Lee) 한국추진공학회 2008 한국추진공학회 학술대회논문집 Vol.2008 No.5
본 연구는 고체 추진제 그레인의 형상 변화에 따른 연소 특성을 고찰 하였다. LRE(액체로켓엔진)는 추진제의 공급량을 조절하여 추력을 변화시킬 수 있지만, SRM(고체로켓모터) 연소기 형상은 단순하지만 연소가 시작되면 추력 제어가 어렵다. 이러한 SRM(고체로켓모터)의 추력 제어의 어려움을 그레인의 크기나 형상의 변화를 통해 부분적으로 해결 할 수 있다. 소형 로켓의 추진제에 적합한 그레인을 설계하고 실험을 통해 검증하였습니다. This work is to observe combustion characteristics depending on variation of the solid propellent grain configuration. The LRE (Liquid Rocket Engine) enables adjusting the thrust by controling the required fuel mass glow, but the SRM(Solid Rocket Motor)is not easy to adjust th thrust due to the difficulty of th fuel flow control by its combustion behavior even its configuration is simple. This difficulty can be partly solved by changing th size or the configuration of the propellant grain. In this study a proper grain configuration of a small solid rocket is selected through both the theoretical design and the experimental tests.
윌리엄 칼로스 윌리엄즈와 찰스 디무스의 상호텍스트성 연구
심진호 새한영어영문학회 2008 새한영어영문학 Vol.50 No.2
This paper investigates how the works of Williams and Demuth have a common artistic direction. Since they knew their identical interest in both poetry and painting, the two artists have had a longtime friendship. Through the exchanges of their intertextual discourse, they can create a unified art across the boundary between pictorial and linguistic media. Thus, Williams' "The Pot of Flowers" and Demuth's "I Saw the Figure Five in Gold" are their collaborations of intertextuality. Significantly, they endeavored to create a new American expression which is based on Precisionism. In fact, Precisionism, which intrinsically has poetic and aesthetic characteristics at the same time, is said to be regarded as the most indigenous American art. Both Williams and Demuth try to reflect an American identity in poetry and paintings through a medium of Precisionism.Therefore, Precisionism plays an important role as a link which connects the two artists. However, the two artists want to recreate a new work of art by avoiding the mere literal imitation of each other's works. They adopt pictorial elements in poetry and linguistic elements in paintings so that they can ultimately make true collaborations. Accordingly, Williams and Demuth intend a unified art which reflects the most American things by mutually supplementing the limits of poetry and paintings respectively.