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얼굴 영역 추적을 통한 향상된 손 영역 추적에 관한 연구
손지수 ( Jisoo Son ),김동규 ( Dongkyu Kim ),이승호 ( Seung Ho Lee ),노용만 ( Yong Man Ro ) 한국정보처리학회 2015 한국정보처리학회 학술대회논문집 Vol.22 No.1
손 영역 추적에서는 피부색이 가장 유용한 정보 중 하나이다. 그런데 손 영역과 얼굴 영역이 서로 겹치거나 가까이 있을 때 손 영역의 추적결과인 바운딩이 얼굴 영역까지 불필요하게 확장되는 문제점이 존재한다. 본 논문에서는 얼굴 영역 추적결과를 손 영역 추적에 사용한다. 구체적으로, 얼굴 영역 내에 손 영역의 바운딩이 침투하지 않도록 한다. 실험결과, 얼굴 영역 추적결과를 사용한 경우 그렇지 않은 경우에 비해 손 영역의 바운딩을 정확히 예측하였으며 초당 30~35 프레임의 빠른 계산속도를 유지하였다.
작물에 흡수된 방사성 동위원소의 내부 조사효과에 관한 연구 (6) - 아마의 (亞麻) 생장에 미치는 P-32 의 영향
손응용(Eng Yong Son),김길환(Hwan Kil Kim),차종환(Jong Whan Cha),전정일(Chung Il Chan) 한국식물학회 1969 Journal of Plant Biology Vol.12 No.1
To investigate the effects of internal radiation of various intensity on the test crop(flax), seeds of four levels of activity(15.5×10 exp (-4) μc/grain, 9.O×10 exp (-2) μc/grain, 2.2×10 exp (0) μc/grain and 3.8×10 exp (1) μc/grain) which had been obtained by immersing them into various concentrations of P-32 original solution (total activity: 90 mc, To: 3/21) for 24 hours at room temperature, were germinated, transplanted later into pots, and the rate of germination and the successive growth were observed, and the inorganic conents of the plant top were analyzed. The results are as follows: 1. At the early stage of germination, the plants manifested themselves both inhibitory and promotive effects at higher and lower activity levels respectively, compared those of the control. These difference of growth on account of different levels of activity appeared, however, to be gradually narrowed in the course of time after germination, except at the highest activity. 2. Two weeks after transplanting, the plants of the lowest activity showed more vigorous growth than those of control. The plants belonging to the other activity levels on the other hand, tended to be less growing, the higher the activity. However, this growth gap between treatments seemed to be progressively closed one month after transplanting. 3. Most of the leaves and stems of the plants belonging to the highest activity level (3.8×10 exp (1) μc/grain) were withered during the early stage of growth, and this damage did not recover. 4. Practically no difference of growth was observed among treatments(excluding that of highest activity) one and half months after transplanting. 5. The fluorescence tended to be more delayed than the control, as the activity decreased. 6. There was a tendency that the number of pods harvested were larger in the plants treated with P-32 than that of the control. 7. The proportion of fiber in the plants at harvest appeared to be larger at lower activity and smaller at higher P-32 concentration than that of control 8. As for the inorganic contents of the plant top harvested the following tendency was observed: (1) Nitrogen content was highest at the highest activity level at which the poorest growth ensued. (2) There was no clear difference of phosphorus content among treatments. (3) The contents of potassium and magnesium were higher than control at the medium levels of activity. (4) Calcium content of all treated blocks was found to be more than that of control.
손선영(Sunyoung SON),Shin-ichi NISHIDA,이종형(Jong-hyung LEE),김영태(Young-tae KIM),이도경(Do-kyung LEE),손용제(Yong-jea SON),장현덕(Hyun-duck Jang) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.4
새로운 티타늄기 MMCs(W/ Ti-6Al-4V)에 대한 기계적 특성에 대한 연구를 행하여 평가한 결과를 나타내었다. HIP(hot isostatic pressing) 제조법과 RS(Rotary Swaging) 2 차 가공을 통하여 텅스텐 섬유 함유율이 각각 6, 9, 12 vol%인 W/Ti-6Al-4V MMCs 를 제작하였으며, 경도는 기존의 Ti-6Al-4V 합금과 비교하여 20-30%, 인장강도는 50%(비강도-38%) 높은 값을 얻었다. 섬유 함유율 9vol.% 에서 가장 높은 인장 값을 나타내었으며, MMCs 에서 메트릭스와 계면 사이에 생성된 확산상에 의해서 경도 및 인장강도가 향상되었다. 또한 피로 강도를 향상 시키기 위한 방법으로 메트릭스의 질적 향상을 위한 HIP 제작조건에 대한 추가적인 연구가 필요하다. The objective of this study is the estimation of the mechanical properties of HIP-treated MMCs by an optimized manufacturing process. The Ti-MMCs were fabricated by HIP and rotary swaging (RS) for secondary processing. The Ti-MMCs with different tungsten fiber contents of 0, 6, 9, and 12 vol% were subjected to tensile tests, fatigue tests, and hardness tests. The results show that the hardness values of Ti-MMCs increased with the increasing volume percent of tungsten fibers, the tensile strength increased by approximately 50% (specific strength: 38%) at the 9 vol%. The value of tungsten-fiber orientation F affects the tensile strength. The fatigue strengths of the Ti-MMCs did not improve. HIP is a useful manufacturing method for Ti-MMCs and RS is an important process for improving fiber orientation during secondary processing.
손용기(Yong-gi Son),유정호(Jeong-ho Yoo),유영숙(Young-sook Yoo),김종춘(Jong-choon Kim),이성욱(Sung-wook Lee),조인억(In-eok Cho) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As the concerns regarding global worming were increased, the pressure of greenhouse gas(GHG) emission reduction on mobile source was also increased. Carbon Dioxides contribute over 90% of total GHG emission and the mobile source occupies about 20% of this CO₂ emission. Therefore automotive exhaust is suspected to be one of the major reasons of the rapid increase in greenhouse effect gases in ambient air. In this study, in order to investigate CO₂ emission factor characteristics from passenger cars(PC), which is the most dominant vehicle type in Korea, 103 vehicles were tested on the chassis dynamometer. CO₂ emissions and fuel efficiency were measured. The emission factor characteristics by displacement, gross vehicle weight, vehicle speed and CVS-75/vehicle speed mode were discussed. Test modes were vehicle speed modes and CVS-75 mode that have been used to develop emission factors and to regulate for light-duty vehicle in Korea. It was found thai CO₂ emissions showed higher large displacement, heavy gross vehicle weight, low vehicle speed and CVS-75 mode than small displacement, light gross vehicle weight, high vehicle speed and vehicle speed mode, respectively. From these results, correlation between CO₂ emission and fuel efficiency was also determined. The results of this study will contribute to domestic greenhouse gas emissions calculation and making the national policy for climate change.