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김도관(Do-Goan Kim),한은미(Eun-Mi Han),이윤희(Yoon-Hee Lee),문희경(Hee-Kyung Moon),정창원(Chang-Won Jeong) 한국컴퓨터정보학회 2011 한국컴퓨터정보학회 학술발표논문집 Vol.19 No.1
본 논문은 효율적 전력 활용을 위한 유무선 센서기술을 활용한 홈 스마트 그리드를 제안한다. 특히, 에너지의 효율적 활용과 절약을 유도하기 위한 스마트 그리드 기술은 현재 전력의 공급처와 사용자 간의 전력 수급과 관련된 효율적 정보의 수집에 초점이 맞춰져 있으나, 전력의 주요 사용자인 일반가정에서의 계획성 있는 전력 사용을 유도하기 위해서는 이와 관련된 파급기술의 개발이 요구된다. 따라서 논문은 공급처와 사용자 사이의 스마트 그리드가 아닌 가정에서 전력의 사용처를 쉽게 파악하여, 에너지 활용을 계획 및 통제하고, 나아가 에너지의 절약을 유도하기 위한 EMS(Energy Management System)에 대해 기술한다.
Reduction of of Hydrogen-Induced Degradation by Using a Phosphorus-Implantation process
Ga-Won Lee,Jae-Hee Lee,Gyu-Han Yoon,Gyu-Seog Cho,Jae-Chul Om,Jae-Goan Jeong,Jae-Hoon Choi,Seong-Wook Park 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.1
In this paper, we propose a new method to suppress the hydrogen-induced hump in n-channel MOSFET's by using phosphorus implantation. When hydrogen generated by post processes diffuses into a silicon substrate, the threshold voltage shifts due to the formation of hydrogen-to-boron bonds that make the boron electrically neutral. We find that the hydrogen diffusivity can be dramatically reduced by phosphorus implantation into the SiO2 layer. The phosphorus implanted into SiO2 bonds to oxygen atoms, which makes hole traps and captures hydrogen. This result indicates that MOSFET degradation due to hydrogen diffusion into a boron-doped Si substrate can be effectively stopped by using a simple implantation process without nitride deposition.
Yang Dae Hyeok,Yoon Goan Hee,Shin Gyun Jeong,Kim Soon Hee,Rhee John M.,Khang Gilson,Lee Hai Bang The Polymer Society of Korea 2005 Macromolecular Research Vol.13 No.2
Conventional poly(methyl methacrylate) (PMMA) bone cement has been widely used as an useful biopolymeric material to fix bone using artificial prostheses. However, many patients had to be reoperated, due to the poor mechanical and thermal properties of conventional PMMA bone cement, which are derived from the presence of unreacted MMA liquid, the shrinkage and bubble formation that occur during the curing process of the bone cement, and the high curing temperature ($above 100^{\circ}C$) which has to be used. In the present study, a composite PMMA bone cement was prepared by impregnating conventional PMMA bone cement with ultra high molecular weight polyethylene (UHMWPE) powder, in order to improve its mechanical and thermal properties. The UHMWPE powder has poor adhesion with other biopolymeric materials due to the inertness of the powder surface. Therefore, the surface of the UHMWPE powder was modified with two kinds of silane coupling agent containing amino groups (3-amino propyltriethoxysilane ($TSL 8331^{R}$) and N-(2-aminoethyl)-3-(amino propyltrimethoxysilane) ($TSL 8340^{R}$)), in order to improve its bonding strength with the conventional PMMA bone cement. The tensile strengths of the composite PMMA bone cements containing $3 wt\%$ of the UHMWPE powder surface-modified with various ratios of $TSL 8331^{R}$ and $TSL 8340^{R}$ were similar or a little higher than that of the conventional PMMA bone cement. However, no significant difference in the tensile strengths between the conventional PMMA bone cement and the composite PMMA bone cements could be found. However, the curing temperatures of the composite PMMA bone cements were significantly decreased.