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김성일,임재홍,조종만,김수홍,남태우,Kim, S.I.,Lim, J.H.,Cho, J.M.,Kim, S.H.,Nam, T.W. 대한의용생체공학회 2006 의공학회지 Vol.27 No.5
The information of eye movement is used in various fields such as psychology, ophthalmology, physiology, rehabilitation medicine, web design, HMI(human-machine interface), and so on. Various devices to detect the eye movement have been developed but they are too expensive. The general methods of eye movement tracking are EOG(electro-oculograph), Purkinje image tracker, scleral search coil technique, and video-oculograph(VOG). The purpose of this study is to embody the algorithm which tracks the location of the gazing point at a pupil. Two kinds of location data were compared to track the gazing point. One is the reference points(infrared LEDs) which is effected from the globe. Another is the center point of the pupil which is gained with a CCD camera. The reference point was captured with the CCD camera and infrared lights which were not recognized by human eyes. Both of images which were thrown and were not thrown an infrared light on the globe were captured and saved. The reflected reference points were detected with the brightness difference between the two saved images. In conclusion, the circumcenter theory of a triangle was used to look for the center of the pupil. The location of the gazing point was relatively indicated with the each center of the pupil and the reference point.
도재소부용(陶材燒付用) Ni-Cr 합금(合金)의 재주조(再鑄造)가 물리적(物理的) 성질(性質)에 미치는 영향(影響)에 관(關)한 연구(硏究)
김성일,김춘진,박남수,한무현,Kim, S.I.,Kim, C.C.,Park, N.S.,Han, M.H. 대한치과보철학회 1981 대한치과보철학회지 Vol.19 No.1
Some physical properties of Ni-Cr based alloy for porcelain veneering were compared after repeated casting without the addition of any new alloy. The specimen were cast in a centrifugal caster with an oxygen-propane torch at optimum temperature. The obtained results were as follows: 1. The yield strength and hardness of the second generation were no significant differences compared with first generation but the yield strength and hardness of the third generation slightly decrased. 2. The ultimate tensile strength and elongation appeared to decrease slightly in second, third generations. 3. The tensile fractured facets of the first generation specimen were normal in all specimen, but in the second generation there were six tensile specimen out of ten, in the third there were four tensile specimen out of ten.
김성일,장우진,주철원,이경호,김해천,Kim, S.I.,Jang, W.J.,Ju, C.W.,Lee, K.H.,Kim, H.C. 한국전자통신연구원 2009 전자통신동향분석 Vol.24 No.6
최근 북한의 미사일 발사시험과 이를 둘러싼 주변국들간의 군사력 강화 움직임이 한반도의 안보에 심각한 위협요소가 되면서 다시금 자주 국방의 필요성에 대한 경각심이 고취되고 있다. 국방기술의 첨단화는 과학기술의 발명에 전적으로 의존하여 향후 국가간 국방과학기술로서 기술력 우위 확보를 위한 치열한 경쟁이 가속화 될 것이다. 이에 우리나라도 미래지향적인 국방기술의 중점육성분야를 분류하고 분야별 해당하는 무기체계와 핵심기술의 기술지도를 주축하여 장기간에 걸친 국방연구개발계획의 실행을 지속해오고 있다. 향후 선진국과의 기술격차도 해소하고 나아가 기술우위를 점하게 되면 자주국방이 가능하게 되고 기술력의 수출까지 가능해질 것이다. 본 고에서는 국내 국방 무기체계 및 특히 국방전자 분야의 기술과 개발 동향에 대해 살펴보고자 한다.
충돌제트기류를 이용한 밴드건조기의 건조특성에 관한 연구
김성일(S.I. Kim),이욱현(W.H. Lee),전원표(W.P. Chun),이기우(K.W. Lee),이계중(K.J. Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The application of high velocity air jets to heat transfer surface has tremendous engineering potential in various industries. The impinging jets are therefore widely used for their enhanced transport characteristics, especially for drying of continuous materials such as sheet, film, carpets, forming materials and pallets. This paper presents the drying characteristics of plate type material and performs the test with the change of operating conditions in conveyer band dryer using the impinging jet nozzles. The factors influencing drying rate were confirmed, also the design data of band dryer using the impinging jet was obtained.