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고속궤도차량의 로드휠과 궤도의 접촉 강성 및 감쇠계수에 대한 실험적연구
김종수(J.S.Kim),방동창(D.C.Park),김재용(J.Y.Kim),최진환(J.H.Choi) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
An experimental study is presented for the contact property of the interactions between road wheel and track link in order to identify the dynamic characteristics of the tracked vehicle along the vertical direction and the loading conditions. The revolving rubber molded track link and road wheels are subjected to the reaction forces from the ground, the traction forces from the engine which lead to the tension, compression, and torsional load as the operational conditions and environment. The dynamic effect of the contact stiffness and damping coefficients between road wheel and track link is illustrated by using experimental methods which can be used to the dynamic simulation of the multibody tracked vehicle.
솔잎혹파리 耐蟲性 品種 育成에 關한 硏究 Ⅱ. 솔잎혹파리 耐蟲性 Pinus thunbergii의 針葉內 Monoterpene의 季節的 變化
C. S. KIM(金鼎錫),S. H. HONG(洪性昊),J. B. RYU(柳長發),C. CHOI(崔澈),J. S. KIM(金鍾秀) 한국육종학회 1976 한국육종학회지 Vol.8 No.3
Employing 7-15 resistant and 8-15 susceptible Japanese black pine (Pinus thunbergii Parl.) trees to pine gall midge (Thecodiplosis japonensis Uchida et Inouye) as samples, needle monoterpenes were analysed by GLC in January and June, and observation was made on the oviposition preference. Following results were obtained. 1. In January, the resistant trees showed higher contents of myrcene, limonene, β-phellandrene and terpinolene but lower contents of α-and β-pinene and camphene compared to the susceptible trees. But in June, α-pinene, camphene, limonene, β-phellandrene and terpinolene were higher and the content of β-pinene and myrcene were lower in the resistant trees than the susceptible trees. 2. The content of limonene was higher by 6.8 percent and the content of β-pinene was lower by 9.2 percent in the resistant trees than in the susceptible trees in June. 3. No preference for oviposition was found between resistant and susceptible trees. But in the resistant trees gall formation rate was quite lower than the susceptible trees. It was considered. therefore, that limonene and β-pinene content in the needle might be used as an indicator of the resistant Japanese black pine to the pine gall midge regardless of season.
김종수(J. S. Kim),김광수(K. S. Kim),고창성(C. S. Go),손시호(S. H. Son),조한수(H. S. Cho) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
본 논문은 초고압 지중송전선로에 사용되는 500㎸ XLPE 케이블 및 접속함 개발에 대해 기술하였다. 500㎸ 케이블은 XLPE 절연두께를 30㎜로 설계하였고, 직선 접속함, 기중 종단 접속함 그리고 가스중 종단 접속함을 500㎸ 시스템에 맞게 전기적, 기계적 성능을 고려하여 설계하였다. 모든 접속함은 접속시공을 하는데 간편하도록 설계하여 공장에서의 routine test, special test을 수행후 실운전시 위험 요소를 제거 하도록 설계하였다. 케이블 시스템의 유효성 검정을 위한 IEC 표준에 따른 형식시험(Type Test)를 성공적으로 완료하여 개발된 500㎸ 케이블 시스템 전체의 신뢰성을 확인할 수 있었다.