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노진성,서호영,김지현,이정섭,홍기민 한국물리학회 2018 새물리 Vol.68 No.7
전기도금 방법으로 BiTe 박막을 제작하였는데, 전해액의 조성과 도금 전압을 변화시킴으로써 BiTe의 성분비를 조절하였다. 도금 공정의 변화에 따른 BiTe 박막의 결정성, 입도 및 전기전도 특성을 조사하고 열전특성의 하나인 전력 상수를 측정하였다. 도금 박막에 대한 열처리를 통하여 박막의 입도와 결정성의 변화를 유도하였는데, 일반적으로 열처리 시간의 증가에 따라 입도는 증가하는 경향을 보였다. 다양한 BiTe 박막 중 주로 (110)의 결정성을 지닌 박막에 대하여 전력 상수를 측정한 결과 시료 양단간의 온도차가 10 $^\circ$C일 때 가장 큰 전력 상수를 나타낸다. We fabricated BiTe thin films by using electroplating methods. The compositions of the thin films were controlled by applying different process conditions, such as the electrolyte's composition and the plating potential. We investigated variations in the cystal orientations and the grain sizes due to changes in the process parameters. We also measured the power factor of the films, which is one of the most important parameters for thermoelectric elements. We induced changes in the grain size and the crystal orientation by using high-temperature annealing. Generally, the grain sizes increased proportionally with increasing annealing time. A thin film that was mostly composed of BiTe(110) exhibited the largest power factor when the temperature difference was 10 $^\circ$C.
LINCAP MDB에서 MADYMO Scaling 방법을 이용한 탑승객 상해 Correlation
노진성(Jinsung Rho),손창규(Changkyu Son),김동석(Dongseok Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The lateral crash analysis can be divided into two steps. The first step is a structure deformation phase by MDB (Moving Deformable Barrier) or the pole. The second step is a dummy interaction phase when a dummy contacts against a door trim and a side air bag. Occupant behavior and injury is affected more by the deformation and the impact velocity. The deformation and velocity data of the vehicle structure can be obtained from crash simulation. They can be transferred to as MADYMO input data. MADYMO can adjust the data to make dummy injury more correlated. In this case, to have a more correlated MADYMO model, PSM (Prescribed Structural Motion) data, which has the positions of all nodes at every time step, should be pertinently adjusted. Two methods are proposed in adjusting the structure behavior. One is to scale time of the structure intrusion, another is to scale displacement of the structure intrusion at every time step. These methods will help to reduce difference between physical test results and occupant CAE analysis results of dummy injury. This study shows better correlated injuries under US LINCAP Barrier conditions.