http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
직접 용액 코팅법에 의해 제조한 CuInSe<sub>2</sub> 에 잔존하는 탄소 불순물층 형성에 관한 연구
안세진,어영주,곽지혜,윤경훈,조아라,Ahn, SeJin,Rehan, Shanza,Eo, Young-Joo,Gwak, Jihye,Yoon, Kyunghoon,Cho, Ara 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.1
Formation mechanism of residual carbon layer, frequently observed in the $CuInSe_2$ (CIS) thin film prepared by direct solution coating routes, was investigated in order to find a way to eliminate it. As a model system, a methanol solution with dissolved Cu and In salts, whose viscosity was adjusted by adding ethylcellulose (EC), was chosen. It was found that a double layer, a top metal ion-derived film and bottom EC-derived layer, formed during an air drying step presumably due to different solubility between metal salts and EC in methanol. Consequently, the top metal ion-derived film acts as a barrier layer inhibiting further thermal decomposition of underlying EC, resulting a formation of bottom carbon residue layer.
다양한 크기와 주파수 그리고 감쇠를 갖는 상하방향 전신 충격진동에 대한 불편함 연구
안세진,유완석,정의봉,Ahn, Se-Jin,Griffin, Michael J.,Yoo, Wan-Suk,Jeong, Weui-Bong 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.2
Shocks are excited by impulsive forces and cause discomfort in vehicles. Current standards define means of evaluating shocks and predicting their discomfort, but the methods are based on research with a restricted range of shocks. This experimental study was designed to investigate the discomfort of seated subjects exposed to a wide range of vertical shocks. Shocks were produced from the responses of one degree-of-freedom models, with 16 natural frequencies (from 0.5 to 16 Hz) and four damping ratios (0.05 0.1, 0.2 and 0.4), to a hanning-windowed half-sine force inputs. Each type of shock was presented at five vibration dose values in the range $0.35\;ms^{-1.75}$ to $2.89\;ms^{-1.75}$. Fifteen subjects used magnitude estimation method to judge the discomfort of all shocks. The exponent in Stevens' power law, indicating the rate of growth in discomfort with shock magnitude, decreased with increasing fundamental frequency of the shocks. At all magnitudes, the equivalent comfort contours showed greatest sensitivity to shocks having fundamental frequencies in the range 4 to 12.5 Hz. At low magnitudes the variations in discomfort with the shock fundamental frequency were similar to the frequency weighting $W_b$ in BS 6841, but low frequency high magnitudes shocks produced greater discomfort than predicted by this weighting. At some frequencies, for the same unweighted vibration dose value, there were small but significant differences in discomfort caused by shocks having different damping ratios. The rate of increase in discomfort with increasing shock magnitude depends on the fundamental frequency of the shock. In consequence, the frequency-dependence of discomfort produced by vertical shocks depends on shock magnitude. For shocks of low and moderate discomfort, the current methods seem reasonable, but the response to higher magnitude shocks needs further investigation.
직접 용액 코팅법에 의해 제조한 CuInSe₂에 잔존하는 탄소 불순물층 형성에 관한 연구
안세진(SeJin Ahn),Shanza Rehan,어영주(Young-Joo Eo),곽지혜(Jihye Gwak),윤경훈(Kyunghoon Yoon),조아라(Ara Cho) 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.1
Formation mechanism of residual carbon layer, frequently observed in the CuInSe₂ (CIS) thin film prepared by direct solution coating routes, was investigated in order to find a way to eliminate it. As a model system, a methanol solution with dissolved Cu and In salts, whose viscosity was adjusted by adding ethylcellulose (EC), was chosen. It was found that a double layer, a top metal ion-derived film and bottom EC-derived layer, formed during an air drying step presumably due to different solubility between metal salts and EC in methanol. Consequently, the top metal ion-derived film acts as a barrier layer inhibiting further thermal decomposition of underlying EC, resulting a formation of bottom carbon residue layer.
오더 해석 기법을 이용한 스틸휠 장착차량의 조향휠 진동 분석
안세진(Sejin Ahn),박준용(Junyong Park),문경섭(Kungsup Mun),유완석(Wansuk Yoo),배명호(Myungho Bae) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The steel wheels are still used in the passenger cars because of their low cost of production although the aluminum wheels have many advantages in their performance and appearance. Imbalance and/or misalignment of the steel wheels excite the knuckles of the vehicle, which causes the steering wheel vibration. Both the constant velocity driving test and the run-up test are fulfilled in this study to analysis the causes and path of the steering wheel vibration generated from the steel wheels. And this study shows that the steering wheel vibration is affected by the fastening torque of the wheel mounting bolts between the steel wheel and the suspension disk.
범퍼 통과 차량의 안락성에 대한 주관평가와 객관평가의 상관성 도출에 관한 연구
안세진(Se-Jin Ahn),유완석(Wan-Suk Yoo),김민석(Min-Seok Kim),김명환(Myung-Hwan Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
There have been various studies to find out the correlation between subjective and objective evaluation<br/> ride comfort in vehicle. To be proper, subjective evaluation considers the signal pattern of vibration generated<br/> by vehicle. In this study, driving test is carried out to extract the correlation between subjective evaluation by<br/> subjects and vibration signals measured on the seat when a test vehicle is passing over test bumpers, which<br/> have two sorts of width change and height change respectively. A unique reference bumper is used to be<br/> compared with the relative comfort of test bumpers.