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RISS 인기검색어
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- 저자 : 김영곤(Kim, Yeong Gon) (검색결과 469 건)
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DLC 박막이 코팅된 폴리머 애자의 표면 및 물리적 특성
김영곤,박용섭,Kim, Young Gon,Park, Yong Seob 한국전기전자재료학회 2021 전기전자재료학회논문지 Vol.34 No.1
In this study, we tried finding new materials to improve the stain resistance properties of polymer insulating materials. Using the filtered vacuum arc source (FVAS) with a graphite target source, DLC thin films were deposited on silicon and polymer insulator substrates depending on their thickness to confirm the surface properties, physical properties, and structural properties of the thin films. Subsequently, the possibility of using a DLC thin film as a protective coating material for polymer insulators was confirmed. DLC thin films manufactured in accordance with the thickness of various thin films exhibited a very smooth and uniform surface. As the thin film thickness increased, the surface roughness value decreased and the contact angle value increased. In addition, the elastic modulus and hardness of the DLC thin film slightly increased, and the maximum values of elastic modulus and hardness were 214.5 GPa and 19.8 GPa, respectively. In addition, the DLC thin film showed a very low leakage current value, thereby exhibiting electrical insulation properties.
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김영곤,Kim, Yeong-Gon 한국건강관리협회 2008 건강소식 Vol.32 No.7
오래 사는 것 보다 건강을 유지하며 사는 것을 더욱 중요시하는 시대에 한국인이 가장 조심해야 할 질병은 암. 우리나라 국민들이 평균수명까지 생존할 경우 암에 걸릴 확률은 남자 27.7%, 여자 22.2%로 국민 3명 당 1명은 암에 걸릴 수 있다. 그러나 암은 금연, 균형 잡힌 식단, 꾸준한 운동 등 생활 습관을 올바르게 유지함으로써 예방 할 수 있고, 초기에 발견하면 치료 확률도 높다.
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스퍼터링 Mo 도핑 탄소박막의 특성과 유기박막트랜지스터의 게이트 전극으로 응용
김영곤,박용섭,Kim, Young Gon,Park, Yong Seob 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.1
Mo doped carbon (C:Mo) thin films were fabricated with various Mo target power densities by unbalanced magnetron sputtering (UBM). The effects of target power density on the surface, structural, and electrical properties of C:Mo films were investigated. UBM sputtered C:Mo thin films exhibited smooth and uniform surfaces. However, the rms surface roughness of C:Mo films were increased with the increase of target power density. Also, the resistivity value of C:Mo film as electrical properties was decreased with the increase of target power density. From the performance of organic thin filml transistor using conductive C:Mo gate electrode, the carrier mobility, threshold voltage, and on/off ratio of drain current (Ion/Ioff) showed $0.16cm^2/V{\cdot}s$, -6.0 V, and $7.7{\times}10^4$, respectively.
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POSIX 쓰레드를 이용한 SR 실행지원시스템의 설계 및 구현
김영곤,정영필,박양수,이명준,Kim, Yeong-Gon,Jeong, Yeong-Pil,Park, Yang-Su,Lee, Myeong-Jun 한국정보처리학회 1997 정보처리논문지 Vol.4 No.4
본 연구에서는 POSIX 쓰레드(Pthreads)를 사용하여 구현한 새로운 SR 실행지원 시스템인 SR/RTS+를 제시한다. SR은 다중의 병행 제어 프리미티브를 이용해서 다양한 병행 프로그래밍 기법을 제공한다. 윈 SR 실행지원시스템이 자신의 고유한 쓰레드 경영 기법을 사용하였기 때문에 다른 컴퓨터 시스템에서 동작하기 위해서는 실행지원 시스템의 수정이 필요하다. 더우기 실행지원시스템의 실행 효율성은 이런 각각의 상이한 시스템에 연관되어 개별적으로 고려되어야 한다. 따라서 이식성을 증가시키고 실행 효 율성을 예측 가능하도록 하기 위해서 SR/RTS+를 하나의 POSIX프로세스내에서 다중의 실행의 쓰레드를 제공하는 Pthreaes(POSIX쓰레드)상에서 설계되었다. 또한 ,SR 컴파일러 Ptherads 인터페이스를 위한 코드를 적절히 생성하도록 수정되었다. SR/RTS+는 Florida Sate Univerisity에서 제공하는 Pthreads 라이브러리를 사용하여 Spare Workstation 상에서 개발되었으며, University of Arizona에서 제공하는 SR 검증 도구로 테스트하였다. In this paper,we prosent a new run-time support system for SR usitn POSIX threads (Pthreads),called SR/RTS +.SR supports a rich set of concurent programming techniques with multiple cincurrency control primit-ives Since the original RTS for SR uses its own thread management facility,it should be modifide to work on different computer systems.Furthermore,the run-time efficiency of the RTS should be considered in association with those different sytems.Thus,to portability and to guarantee the predictable run-time ef-ficiency,SR/RTS + is designed on the pthreads(POSIX Threads )which supports multiple threads of con-trol within a single POSIX process.Also, the SR compiler is modified to generate the codes appropriate for pthreads interface.SR/RTS + has been develped on Spare Workstation using pthreads library announced by Florida State University and tested with the SR verification suite distribute by the University of Arizona.
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탄소나노튜브 양에 따른 CMP-PLA 방열 소재의 특성
김영곤,Kim, Young-Gon 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.12
In this study, we proposed CMP-PLAs to replace the Al heat sinks as heat sink materials, and investigated heat dissipation characteristics of the LED lighting devices using them. The crystallinity of the proposed CMP-PLA heat sinks decreased with increasing carbon nanotube contents in CMP-PLA. However, the thermal conductivity was improved with the increase of the carbon nanotube contents. The heat dissipation characteristics of the LED lighting devices using CMP-PLA heat sinks was improved with increasing carbon nanotube contents in CMP-PLA. For the LED lighting devices using CMP-PLA heat sinks with 40% carbon nanotube contents, the initial temperature measured at the heat sink plate was $27^{\circ}C$, which increased as time, and it was saturated around $56^{\circ}C$ after an hour. The LED lighting devices using CMP-PLA heat sinks are expected to be functional materials that can reduce their weight and improve their electric properties, compared to those using existing Al heat sinks.
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김영곤,Kim, Yeong-Gon 대한치과기공사협회 2004 齒科技報 Vol.254 No.-
회관 부족금 마련 운동 전개/치과기공사선교회,"우즈베키스탄치과기공사협회 결성"지원/2003년 회비 납부율 57.9%로 저조/이사회 소식/치과기공사 공급과잉, 수급관리 계획 필요/대법원"의지가 여러 병원 운영은 합법"/2004년 대표자연수회 및 체육대회 준비사항 논의/제 40차 종합학술대회 실기강연 동영상 CD로 진행/인천회 사무국 이전식/대구회,홈페이지 새로 단장/2004년 회무 전망/2004년도 위원회별 사업계획/대북구강사업 WTO와 연계/윤리강령.선서문 개정 선포/치협에 성폭생 관련 공개사과 요구/해외로 뻗는 한국 치과기공사 봉사활동/치과기공사 선교회 우즈베키스탄 사역보고/Gold Electroforming System을 이용한 브릿지 제작법/회관건립기금 모금운동에 동참합시다/
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7.5 W CMP-PLA 방열판을 적용한 LED 등기구 특성
김영곤,Kim, Young-Gon 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.12
In this paper, the characteristics of a carbon nanotube composite heat sink proposed to replace the advanced Al heat sinks for LED lighting devices were studied. Proposed CMP-PLA heat sink was made by mixing 20~70 wt% carbon nanotube, 20~70 wt% bio-degradable polymer of melt-blended PLA (poly lactic acid) and PBS (poly butylene succinate) and PLA nucleating agents composed of the mixture of soybean oil and biotites, at $150{\sim}220^{\circ}C$ with 1,000~1,500 rpm. Optical and electric characteristics of 7.5 W LED lighting devices using heat sinks with such prepared CMP-PLA were investigated. And, the properties of the heat, which was not released from the CMP-PLA type heat sinks, was also investigated. The color temperature of LED lighting devices using the CMP-PLA heat sinks was 5,956 K, which is x= 0.32 and y= 0.34 in the XY chromaticity, and the color rendering index was 75. The luminous flux and the luminous efficiency of LED lighting devices using the CMP-PLA heat sinks was 540.6 lm and 72.68 lm/W respectively. Measured initial temperature of the heat sinks was $27^{\circ}C$, and their temperature increased as time to be saturated at $52^{\circ}C$ after an hour.
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