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- 저자 : 김완식(Wan Shik Kim) (검색결과 6 건)
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김경호(Kim, Kyoung-Ho),이호진(Lee, Ho-Jin),김완식(Kim, Wan-Shik) 한국해안해양공학회 2008 한국해안해양공학회 논문집 Vol.20 No.5
본 연구에서는 해저관로의 국부세굴 특성을 고찰하기 위하여 파랑과 정상흐름이 결합된 흐름장에서 실험을 수행하였다. 조파장치와 흐름 발생장치를 이용하여 파랑과 흐름의 방향이 일치하는 경우와 반대인 경우에 대해서 검토하였다. 관경, 주기, 파고, 흐름속도 등을 변화시켜 가면서 해저관로 주변의 국부 세굴심을 측정하였다. 실험결과 최대평형 세굴심은 관경, 주기, 파고, 흐름속도가 증가할수록 증가하였다. 실험결과를 통하여, Shields 수, Froude 수, KC 수, 주기매개변수, Ursell 수, 수정 Ursell 수 및 유속비 등의 매개변수가 세굴심에 미치는 영향을 분석하였다. Froude 수와 Shields 수가 국부세굴을 일으키는 주요매개변수로 나타났는데, 이것은 파랑과 흐름이 결합된 흐름장에서 어느 한도 내에서는 흐름이 세굴을 지배하는 것을 보여준다. In the study, experiments are performed in the interaction region combined with wave and current to investigate the characteristics of local scour around submarine pipelines. Wave generator and current generator are used for the experiments and two current directions were used; co-direction and counter direction to the wave. The local scour depths around the pipeline are obtained according to the various pipe diameters(D), wave periods(T), wave heights(H), and current velocities(V). The experiments show that the maximum equilibrium local scour depth increases with pipe diameter, wave period, wave height, and current velocity. Using the experimental results, the correlations of scour depth and parameters such as Shields parameter(θ ), Froude number(Fr), period parameter, Keulegan-Carpenter number(KC), Ursell number(U<sub>R</sub>), modified Ursell number(U<sub>RP</sub>) and ratio of velocities(U<sub>c</sub>/(U<sub>c</sub>+U<sub>m</sub>)) are analyzed. In the interaction region combined with waves and currents, Froude number and Shields parameter are found the main parameters to cause the local scour around the submarine pipelines and this means that current governs the scour within any limits of the currents.
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박어진(Eojin Park),김완식(Wan Shik Kim),박찬국(Chan Gook Park) 한국항공우주학회 2009 韓國航空宇宙學會誌 Vol.37 No.10
본 논문에서는 제한된 센서 조건에서 유도탄 동체의 각속도를 계산하는 법을 보이고 Flight Motion Simulator(FMS)를 이용한 각속도 계산식 검증을 다룬다. 일반적으로 유도탄 동체의 각속도는 동체에 탑재하는 각속도 자이로를 이용하여 측정하지만, 유도탄 동체에 탑재하는 관성 센서 중에 피치와 요 각속도 자이로가 없는 제한된 센서 조건을 가정한다. 이와 같은 제한된 센서 조건에서 김블 탐색기 자이로, 동체의 롤 각속도 자이로, 김블의 자세 측정값 및 자세 변화율을 이용하여 유도탄 동체의 각속도를 계산할 수 있음을 보인다. 제안한 각속도 계산식을 검증하기 위하여 FMS를 이용한 실험을 수행하였다. This paper focuses on the calculation of the missile angular velocity under the reduced sensor condition and its verification using the Flight Motion Simulator(FMS). The missile angular velocity is usually measured by the body gyroscopes, but we assume that the inertial sensors on the missile body are in the absence of pitch and yaw gyroscopes. Under this reduced sensor condition, this paper shows the missile angular velocity can be calculated by using the gimbal seeker gyroscope, the roll body gyroscope, the gimbal angle and its rate. The FMS experiment was carried out to verify the proposed algorithm.
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수행평가 활용을 위한 축구기술검사 개발과 타당성 및 신뢰도 검증
이신언(Shin Eon Lee),김형돈(Hyung Don Kim),김완식(Wan Shik Kim) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.34
The purpose of this study was to investigate validity and reliability of newly developed KLK soccer skill test for the use of performance based evaluation utilized in middle and high school setting. The subjects consisted of 60 college students and divided into three groups; advanced group, intermediate group, and beginner group. The advanced group are highly trained players and member of college soccer team and intermediate group are not highly trained players and member of club. Beginner group are not playing soccer on regular basis and student of non-physical education major. KLK soccer skill test was developed to improve the disadvantages of Mor-Christian soccer skill test in 1979. KLK soccer skill test could be performed in outdoor and wide space which maximally simulated soccer skill in real match. KLK soccer skill test is a battery test consist of dribbling, passing, and shooting skill. The results showed that there was significant group differences in all of the soccer skill at Mor-Christian soccer skill test and KLK soccer skill test. The significant correlation coefficient exists in all the soccer skill test between Mor-Christian soccer skill test and KLK soccer skill test, which means newly developed KLK soccer skill test has reasonable validity. The correlation coefficient changed within each group and thus significant relation was shown only in advanced group. Significant correlation exist in dribbling at intermediate group and dribbling and passing at beginner group. ANOVA and Intraclass correlation coefficient showed that significant reliability of KLK soccer skill test exist in passing and shooting skill test. In conclusion KLK soccer skill test discriminates the levels of soccer skill and showed reliable and valid soccer skill test which could be applied at middle and high school setting for the use of performance based evaluation.
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활로氏四徵을 隨伴한 完全內臟轉錯症 : 2例 手術報告 A Report of Two Cases
李寧均,金完植,洪彰義,金昇煥 中央醫學社 1962 中央醫學 Vol.3 No.5
Case 1 : A twenty - two years old cyanotic korean male was operated on for tetralogy of Fallot with caridio- pulmonary bypass. Irreversible ventricular fibrillation occurred, Autopsy findings confirmed the diagnosis of tetralogy of Fallot with situs inversus totalis. Case 2 : A two tyears old Korean boy was admitted with chief complaints of cyanosis and dyspnea. By X-ray examinations, EKG, and cardiac catheterization, situs inversus totalis with tetralogy of Fallot was diagnosed. End- to - side anastomosis was done between superior veua cava and pulmoary artey(Glenn's poperation) in the left hemithorax. Patient's cyanosis and dyspnea were relieved post-operatively. Both cases showed no Kartahener's syndromes. Association of tetralogy of Fallot with situs inversus totalis has to be published yet according to keith (1958). It is of interest to experience two cases of this anomaly in this institution during a relatively short period of time.
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