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송명도(MD Song) 대한산부인과학회 1962 Obstetrics & Gynecology Science Vol.5 No.1
1. 자미꾸리는 임신반응 실험대상이 되기에는 어렵다. 2. 성숙난의 압출이 많고 적은것은 미꾸리 자체의 난의 보유량과 관계가 있고 수술압박을 가하는 술자의 주관적 선입감의 좌우될 우려가 많다. 3. 본 반응이 chorionic gonadotrophin과 관계가 있다면 60∼90일 임뇨로 peak인 차기시에 대조군과 차이가 없으며 Mole와도 그렇고 Friedmann test와도 부합 안되는 점은 이해하기 곤란하다.
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송명은,성태근,김진성,조경훈,선종우,남산 대한금속·재료학회 2009 ELECTRONIC MATERIALS LETTERS Vol.5 No.1
A 0.96Bi5Nb3O15-0.04Bi4Ti3O12 (0.96B5N3-0.04B4T3) ceramic showed a high dielectric constant (k) of 314, probably due to the increased dipole moment caused by the replacement of Nb5+ ions by Ti4+ ions. The 0.96B5N3-0.04B4T3 films were well formed on the Pt/Ti/SiO2/Si substrate. Films grown at temperatures lower than 400℃ had an amorphous phase but small Bi3NbO7 crystals were considered to have been formed in these films. The film grown at 300℃ exhibited a high k value of 83 with a low dielectric loss of 0.5%. The leakage current density of the film grown at low oxygen pressure (OP) was high and decreased with increasing OP to a minimum at an OP of 200 mTorr, after which it increased with further increase in OP. This variation of the leakage current density with OP was explained by the existence of oxygen vacancies and interstitial oxygen ions in the film. The 0.96B5N3-0.04B4T3 film grown under 200 mTorr OP exhibited a high k value of 83, a low leakage current density of 8 × 10-8A/㎠ at 0.3MV/cm and a high breakdown field of 0.4MV/cm.
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볼 타입 등속조인트 케이지 강도의 역학적 영향인자 분석
송명의(Myeong-eui Song),임영훈(Young-hun Lim),안성백(Sung-beak An),이인상(In-sang Lee),김정윤(Jung-yun Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Constant velocity joint is used for transmitting torque to wheel. Ball joint is popular to outboard type because it allows wheel to bend freely according to steering. Nowadays, the strength requirements of CVJ are being more complicated because of robustness against high engine power and the demand for flexible turning capability in small area. One of the CVJ strength evaluations is quasi-static torsion limitation test, which measures the fracture torque with maximum joint angle on ball joint. Cage web of ball joint determines most fracture strength of CVJ on the test. The study is performed in order to find the reason of cage web weakness with coupled dynamic analysis method. The study shows that firstly, contact force between ball and inner race track at large joint angle makes it between inner race and cage web amplified especially in from 120 to 150 revolution range. Secondly, the kinetic result of cage web’ contact posture for maximum joint angle shows that the phase from 145 to 215 has weak shear strength potential by contact pressure. Finally, the change of track which has bisymmetry shape joint along to shaft direction from joint center shows that the stress of web can be minimized and the strength is very sensitive to track shape
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