http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김명식,임장근,Kim, Myung-Sik,Lim, Jang-Keun 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.6
For the effective analysis of two dimensional plane problems with geometrical discontinuities, singular finite element has been proposed. The element matrix equation was formulated on the basis of hybrid variational principle and Trefftz function sets derived consistently from the complex theory of plane elasticity by introducing a conformal mapping function. In order to suggest the accuracy characteristics of the proposed singular finite element, typical plane problems were analyzed and these results were compared with exact solutions. The singular finite element gives the comparatively exact values of stress concentration factors or stress intensity factors and can be effectively used for the analysis of mechanical structures containing various geometrical discontinuities.
PTFE 및 W 첨가가 Ni-P 도금의 내마모 특성에 미치는 영향
김명식,홍진원,배규식,Kim, Myung-Sik,Hong, Jin-Won,Bae, Kyoo-Sik 한국반도체디스플레이기술학회 2007 반도체디스플레이기술학회지 Vol.6 No.2
Electroless Ni-P coating is widely used for chemical, electronic, and semiconductor equipment parts because of its corrosion resistance. The incorporation of chemically-inert PTFE particles into the Ni-P films improves properties such as, non-stick, anti-adhesive and better corrosion resistance. However, soft PTFE particles degrade the hardness, wear and abrasion resistance. In this study, effects of PTFE and W addition to the Ni-P-coatings were compared by the XRD, SEM, sheet resistance, contact angle, and microhardness measurements. The change in sheet resistance was negligible, but contact angle was doubled by the addition of PTFE and W. The microhardness was lower for Ni-P-PTFE, but higher for Ni-P-PTFE-W coatings, compared to that of Ni-P coatings.
김명식,배규식,Kim, Myung-Sik,Bae, Kyoo-Sik 한국재료학회 2008 한국재료학회지 Vol.18 No.9
BGA test sockets failed earlier than the expected life-time due to abnormal signal delay, shown especially at the low temperature ($-50^{\circ}C$). Analysis of failed sockets was conducted by EDX, AES, and XRD. A SnO layer contaminated with C was found to form on the surface of socket pins. The formation of SnO layer was attributed to the repeated Sn transfer from BGA balls to pin surface and instant oxidation of fresh Sn. As a result, contact resistance increased, inducing signal delay. Abnormal signal delay at the low temperature was attributed to the increasing resistivity of Sn oxide with decreasing temperature, as manifested by the resistance measurement of $SnO_2$.
형질전환 벼 현탁세포 배양에서 세포 사멸 억제를 통한 hCTLA4Ig 생산성 증대
김명식(Myong-Sik Kim),남형진(Hyung-Jin Nam),김민섭(Min-Sub Kim),권준영(Jun-young Kwon),김동일(Dong-Il Kim) 한국생물공학회 2013 KSBB Journal Vol.28 No.4
Transgenic plant cell cultures are an attractive expression system for the production of industrial and pharmaceutical proteins because of their advantages in safety and low production cost. Human cytotoxic T-lymphocyte antigen 4-immunoglobulin (hCTLA4Ig) was produced and secreted when sugar was depleted in culture medium by transgenic rice cell lines (Oryza sativa L.) using RAmy3D promoter. Due to the production of the target protein by sugar depletion, concomitant occurrence of cell death is inevitable. For that reason, inhibition of cell death for enhancing productivity was necessary for the production period without energy sources. Supplementation of 0.1 mM sodium nitroprusside improved cell viability by 1.4-fold and maximum hCTLA4Ig production by 1.3-fold compared to those of control. Addition of 1 and 10 mM glutathione, N-acetylcysteine (NAC), and nicotinamide inhibited apoptotic-like programmed cell death by decreasing the activity of reactive oxygen species. Production hCTLA4Ig was enhanced 1.4-, 1.25-, and 1.15-fold with 10 mM NAC, 1 mM NAC, and 1 mM glutathione, respectively. In addition, it was found that the supplementation of NAC enhanced the cell viability.
췌담도 ; 알코올성 췌장염과 간경변환자에서 알코올 대사효소와 사이토카인의 유전자 다형성
김명식 ( Kim Myeong Sig ),정석 ( Jeong Seog ),이진우 ( Lee Jin U ),권계숙 ( Kwon Gye Sug ),이돈행 ( Lee Don Haeng ),김범수 ( Kim Beom Su ),김형길 ( Kim Hyeong Gil ),신용운 ( Sin Yong Un ),김영수 ( Kim Yeong Su ) 대한소화기학회 2003 대한소화기학회 추계학술대회 Vol.2003 No.-
<목적> 만성음주에 의한 장기의 손상의 개인적 감수성의 차이는 알코올 대사효소나 사이토카인의 유전자 다형성에 의해 영향을 받을 것으로 생각된다. 이 연구는 알코올성 췌장염과 알코올성 간경변 환자에서 알코올 탈수소효소2(ADH2), 알코올 탈수소효소3 (ADH3), 알데하이드 탈수소효소2 (ALDH2), 미소체 에탄올 산화계의 사이토크롬 P450 2E1효소(CYP2E1), 4가지 사이토카인(IL-1, IL-6, IL-8, TNF-α)들의 유전자의 유전자형