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김선원(Sunwon Kim),박차식(Chasik Park),박용재(Yongjae Park) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
In recent years, concern among car users regarding vehicle air quality has been increasing. Air pollution and emission cause car users to be uncomport. Pollen and diesel vehicle exhaust gases entering the cabin and smoke firm fellow passengers not only reduce air quality in the vehicle, but also harmful to the health. Therefore, we developed products improving vehicle air quality, include filers for cleaning polluted air and emission gas coming in from the outside and deodorizing smoke from inside
김선원(S. W. Kim),이제훈(J. H. Lee),서정(J. Seo),신동식(D. S. Shin) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Silicon Nitride (Si₃N₄), which is widely used in a variety of applications, is hard-to-machine due to its high hardness. At high temperature (e.g. above 100℃), however, the machinability can be greatly improved. In this work, we used a CO₂ laser with a high absorptivity to Si₃N₄ of 0.9 to preheat the surface of a rotating Si₃N₄ rod. Preheating and turning of Si₃N₄ was executed at the same time. The result of machining was MRR of 8.0㎥/s that is four faster than normal grinding. Continuous chip formation was observed by a microscope.
디젤차량의 난방성능 개선을 위한 PTC 히터적용에 관한 연구
김선원(Sunwon Kim),조광운(Kwangwoon Cho),박용재(Yongjae Park) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
Recently-increasing demands for diesel engine in the market make an auxiliary heater essential in a passenger car because the fuel-efficient diesel engine does not dissipate enough heat to coolant to warm up the passenger compartment with a single conventional heater at the cold start A PTC heater is becoming a good solution because of its quick heating performance and safety. In this study, we installed a PTC heater in a passenger car and reliability and safety in a car were tested. The heating performance and detfosting performance were also comparatively tested with a glow heater. The result shows that the PTC heater is not a potential source of danger and the heating performance of the PTC heater is superior to that of the glow heater.
김선원(Kim, Sun-Won),김성훈(Kim, Sung-Hoon),황도순(Hwang, Do-Soon),진익민(Jin, Ik-Min) 한국항공우주연구원 2012 항공우주산업기술동향 Vol.10 No.2
본 논문은 기업의 매출 및 인력 현황을 중심으로 세계 위성산업 시장에 대한 최근 동향을 기술한다. 특히, 위성산업이 활성화된 미국과 유럽의 위성개발 업체를 중심으로 시장동향에 대한 분석을 수행한 결과를 보여준다. 위성제작과 발사서비스를 포함하는 위성개발 분야 시장은 위성서비스 분야의 시장 증가율보다는 낮으나 지속적으로 증가하고 있는 추세이다. 경제위기 상황에서 상당수의 기업체는 인수합병을 통하여 경쟁력을 강화하고 있고 대형업체를 중심으로 위성산업이 지속적으로 커지고 있는 추세이다. 또한, 아시아 국가의 위성개발업체의 세계 시장진출이 점차 늘어나고 있는 추세이다. This paper describes recent trend of the world satellite industry focused on the company"s revenue and employment. In particular, this paper shows mainly status of the satellite manufacturers in the United States and Europe with well advanced satellite industry. Satellite development market including satellite manufacturing and launch services continuously expands even though the growth rate is relatively lower than the satellite service area. Through the global economic crisis, many companies were merged to strengthen their competitiveness and the satellite industry is gradually increasing with big companies. And also, more and more Asian manufacturers has entered into the world satellite market.