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초고속 표적의 탄도계수와 예상요격지점 정확도의 상관관계 분석 연구
이동관,조길석,신진화,김지은,Lee, Dong-Gwan,Cho, Kil-Seok,Shin, Jin-Hwa,Kim, Ji-Eun 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.2
A recent air defense missile system(ADMS) is required to have a capability to intercept super-high speed targets such as tactical ballistic missiles(TBMs) by performing engagement control efficiently. The air defense missile system should be ready to engage the TBMs as soon as the ADMS detects TBMs because falling velocity of TBM is very high and remaining time interval to engage TBM is very short. As a result, the ADMS has to predict the trajectories of TBMs accurately with estimated states of dynamics to generate predicted intercept point(PIP). In addition, it is needed to engage TBMs accurately via transmitting the obtained PIP data to the corresponding intercept missiles. In this paper, an analysis about the relationship between ballistic coefficient and PIP accuracy which is depending on geodetic height of the first detection of TBM is included and an issue about effective engagement control for the TBM is considered.
李朝 後期 山水畵의 두 흐름에 關한 考察 : 鄭鮮과 金正喜의 傾向을 中心으로
李東寬 圓光大學校大學院 1981 學位論叢 Vol.6-1 No.-
We can devide the trend of the landscape in the late period of the Yi-dynasty in to three aspects. The one is "Buk Jong Painting" already established the style of drawing, another is "Nam Jong Painting", flowed from Chinese Painting, and the other is Korean landscape, took the model from the real Korean mountains and waters and painted them with the Korean style which was developed by Jung-Sun. Jung Sun can be pointed out as a master of his fellow workers. Until then Korean painters had few opportunities to paint the Korean landscape with original style. Many scholars, took part in "Nam long Painting" and realized their ideas through visible imagery. So many critics thought their efforts as the real Korean landscape and neglected the others in the illiberal attitude for Korean art history. In this thesis, I'll approach the problems though the peculiarity of the Korean art history.
이동관,조석진 한국농업정책학회, 한국축산경영학회 2000 농업경영정책연구 Vol.27 No.1
Enterprise, production function and cost function analyses were applied to 128 dairy farm records surveyed by the National Livestock Cooperatives Federation in 1997. Both production efficiency and herd size turned out to be going parallel. And farms with higher production efficiency were lower in fixed input and concentrate per cow than the otherwise. The results of production function analysis suggest that both concentrate and labor are overinvested, roughage is less than properly invested and miscellaneous cost is rationally invested. Optimum herd size of the sample farms appeared 36 heads in cow equivalent which by far exceeds the current cow herd size 16 heads.
이동관,신혜경,설정현,최준 대한두개안면성형외과학회 2008 Archives of Craniofacial Surgery Vol.9 No.1
Purpose: Lymphangioma circumscriptum is a rare, congenital benign hamartous malformation, caused by the saccular dilatation of lymph channels lines by normal, single cell, lymphatic endothelia that present as local eruptions of persistent, grouped, translucent vesicles. The lymphangioma circumscriptum lesions may occur on axillary fold shoulder, neck proximal limbs and buccal mucosa. We reported a rare case of lymphangioma circumscriptum on the scalp. Methods: A 15-year-old girl with a 5×3cm sized lymphangioma circumscriptum on scalp was examined. It was defined a boundry by ultrasound. And then, a tissue crescent type expander with 120cc normal saline was inserted on occipital area for a month. After confirmed safety margin of the excised lymphangioma circumscriptum on frozen biopsy and the scalp flap was elevated and covered with empty space. Results: A histopathologic finding revealed that lymphangioma circumscriptum. During 11 months follow up, no relapse was found. Conclusion: We described a rare case of lymphangioma circumscriptum on scalp. By using a tissue expander and excision, we achieved no recurrence and aesthetically satisfactory outcome.
큐잉 데이터 기반 하층방어 요격체계의 초고속 표적 탐지 방향 지정을 위한 정밀 궤적예측 기법
이동관,조길석,신진화,김지은,권재우,Lee, Dong-Gwan,Cho, Kil-Seok,Shin, Jin-Hwa,Kim, Ji-Eun,Kwon, Jae-Woo 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.4
A recent air defense missile system is required to have a capability to intercept short-range super-high speed targets such as tactical ballistic missile(TBMs) by performing engagement control efficiently. Since flight time and distance of TBM are very short, the missile defense system should be ready to engage a TBM as soon as it takes an indication of the TBM launch. As a result, it has to predict TBM trajectory accurately with cueing information received from an early warning system, and designate search direction and volume for own radar to detect/track TBM as fast as it can, and also generate necessary engagement information. In addition, it is needed to engage TBM accurately via transmitting tracked TBM position and velocity data to the corresponding intercept missiles. In this paper, we proposed a method to estimate TBM trajectory based on the Kepler's law for the missile system to detect and track TBM using the cueing information received before the TBM arrives the apogee of the ballistic trajectory, and analyzed the bias of prediction error in terms of the transmission period of cueing data between the missile system and the early warning system.