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개인용 항공기 모터의 회전 핀 경사각에 따른 방열 성능 수치해석 연구
김혁중(Hyuk Jung Kim),최종락(Jongrak Choi),서정무(Jung-Moo Seo),양성진(Sungjun Yang) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
In the present study, the heat transfer performance in a motor for a personal air vehicle was investigated numerically. The various shapes of fin arrays according to the inclined fin angle were considered a design parameter. The 3-dimensional steady-state computational fluid dynamics were carried out with the multiple reference frames technique for rotational effects. The axial straight fin array had a better heat transfer performance than the concentric radial fin array because of the enhancement of convection heat transfer. On the other hand, the power consumption of the axial straight fin array was observed highly. This study can be helped to the thermal motor designer by giving the details of temperature distribution inside the motor components.
개인용 항공기 모터의 회전 핀 경사각에 따른 방열 성능 수치해석 연구
김혁중(Hyuk Jung Kim),최종락(Jongrak Choi),서정무(Jung-Moo Seo),양성진(Sungjun Yang) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
In the present study, the heat transfer performance in a motor for a personal air vehicle was investigated numerically. The various shapes of fin arrays according to the inclined fin angle were considered a design parameter. The 3-dimensional steady-state computational fluid dynamics were carried out with the multiple reference frames technique for rotational effects. The axial straight fin array had a better heat transfer performance than the concentric radial fin array because of the enhancement of convection heat transfer. On the other hand, the power consumption of the axial straight fin array was observed highly. This study can be helped to the thermal motor designer by giving the details of temperature distribution inside the motor components.
김혁중(Hyok-joong Kim),최성혁(Sung-Hyuk Choi),김중배(Jung-bae Kim),이형(Hyung Lee),박종원(Jong-won Park) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.2Ⅲ
영상을 실시간으로 처리하기 위한 연구들이 다양한 방법으로 진행되어 왔다. 실현 가능한 접근 방법중 영상관련 프로그램의 실시간 처리를 수행하기 위해 전용 이미지 처리 보드를 제작하는 방법이 있다. 본 논문에서는 다양한 영상 응용프로그램(얼굴인식, 렌더링, 문서인식 등)을 수행할 수 있는 범용 영상보드의 설계 및 다양한 응용 프로그램들을 개인용 컴퓨터에서 사용할 수 있도록 범용 영상보드에 적합한 Windows NT용 디바이스 드라이버를 설계하는 방법을 제시한다.
정태호 ( Tae Ho Jung ),김혁중 ( Hyuk Joong Kim ) 한양대학교 법학연구소 2012 법학논총 Vol.29 No.4
Recently, Supreme Court judged that a patent right has not been effective on the other worked invention by accepting defense of invalidation of patent registration based on a obvious absence of inventive step in a patent right infringement litigation(Supreme Court Decision No.2010Da95390; January 19. 2012). And this determination was also based on an abuse of right about exercising the patent right. In case Patent right has been granted against inventive step, a requirement for patent registration and a reason for invalidation of patent registration, this right should have been only determined as being invalid by a invalidation trial based on the former standard of determination. But Supreme Court has determined whether a patent registration was invalid or not about that in a patent right infringement litigation. In the above Court`s decision, it was determined that a patent didn`t have obviously inventive step and further exercising the patent right fell in an abuse of right in a patent right infringement litigation against the above Patent Law`s principle and the former Supreme Court decision. I think that the determination of the above Court like this is unreasonable, since determination of invalidation of patent and an abuse of right based on an absence of inventive step in a patent right infringement litigation is against Patent Law`s principle and official rights of administrative acts. Therefore, I think that it is proper to revise patent law or apply protest of free technology to patent right infringement case instead of abuse of right. In conclusion, this paper critically analyses and examines a number of problems from the subject case.