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김해성(Haesung Kim),김주현(Joohyun Kim),이성진(Seongjin Lee),원유집(Youjip Won) 한국정보과학회 2010 한국정보과학회 학술발표논문집 Vol.37 No.2B
최근 Flash Memory의 기술이 급격하게 발달하면서 이를 기반으로한 SSD(Solid-state Disk) 또한 컴퓨터 시스템 분야에서 매우 중요한 요소로 자리매김하고 있다. 하지만 Flash Memory의 Erase-before-Write, Block단위의 삭제, Page단위의 읽기, 쓰기와 같은 몇 가지 제약 사항은 시스템 성능 저하의 주요원인이 된다. 이러한 문제를 해결하고자 Flash Memory를 효율적으로 사용하기 위한 관련 연구들이 활발히 진행되고 있으며, 이것의 성능을 측정하기 위한 다양한 Benchmark 도구들 또한 속속 출시되고 있다. 본 논문에서는 QEMU와 KVM 기반의 가상머신에 SSD Emulator와 FTL(Flash Translation Layer)을 삽입하여 SSD의 동작을 시뮬레이션하고 이를 통해 전체 시스템의 성능평가가 가능하도록 고안된 Virtual SSD Simulator에 대해서 소개하고 실험결과를 보인다.
내연기관 및 친환경자동차의 전자파 방사 노이즈 특성 분석
김해성(Haesung Kim),김성범(Sungbum Kim),권해붕(Haeboong Kwon),용기중(Geejoong Yong),용부중(Boojoong Yong) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
hybrid vehicle, electronic vehicle and fuel cell vehicle systems combine sundry motive power source, such as internal combustion and electronic motor vehicle achieving different functions through different power combinations. Hybrid systems possess the following three characteristics: Energy-loss reduction(idling stop), Energy recovery and charge, Motor assist. However, there is no an accurate domestic EMC regulation for Hybrid Vehicle, Electronic Vehicle and Fuel Cell Vehicle. This research is to confirm whether the narrowband emission radiated from Hybrid Vehicle, Electronic Vehicle and Fuel Cell Vehicle can be measured following domestic regulation. We found that test conditions and methods of an internal combustion engine could not be applied due to SOC and charge mode. As a result of this test, we can expect that this research will be used by reference guide in order to revise test specification.
김해성(Haesung Kim),신재곤(Jaekon Shin),배민관(Mingwan Bae),용기중(Geejoong Yong),용부중(Boojoong Yong) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Recent vehicles are equipped with many electrical and electronic components, of which functional interactions are getting more complicated. In this paper, we study the electro-magnetic susceptibility in large commercial vehicles. The substitution method and the closed-loop leveling method are widely used for the electro-magnetic susceptibility test. This study use the Substitution Method and calibration methods of licensed methods are One Field Probe method and Four Field Probe method. The test method is the basis of 3m. Datum point and datum line greater than or equal to 3m and less than or equal to 3m are dividend however this study use the Field Probe method. voluntary reference line execute according to formation of electronic device components and engine in the real vehicle.
친환경첨단자동차의 전자파 방사 노이즈 특성 연구 및 분석
김해성(Haesung Kim),김성범(Sungbum Kim),권해붕(Haeboong Kwon),용기중(Geejoong Yong),용부중(Boojoong Yong) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
hybrid vehicle, electronic vehicle and fuel cell vehicle systems combine sundry motive power source, such as internal combustion and electronic motor vehicle achieving different functions through different power combinations. Hybrid systems possess the following three characteristics: Energy-loss reduction(idling stop), Energy recovery and charge, Motor assist. However, there is no an accurate domestic EMC regulation for Hybrid Vehicle, Electronic Vehicle and Fuel Cell Vehicle. This research is to confirm whether the narrowband and broadband emission radiated from Fuel Cell Vehicle can be measured following domestic regulation.
하이브리드 자동차의 광대역 전자파방사 측정방법에 관한 연구
김성범(Sungbum Kim),신재곤(Jaekon Shin),김성섭(Sungsub Kim),류기해(Gihae Ryu),김해성(Haesung Kim),신재승(Jaesueng Shin) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Automobile hybrid systems combine two motive power sources, such as an internal combustion and electric motor achieving different functions through different power combinations. Hybrid systems possess the following three characteristics: Energy-loss reduction(idling stop), Energy recovery and reuse(charge), Motor assist. However, there is no an accurate domestic EMC regulation for Hybrid Vehicle. This research is to confirm whether the broadband emission radiated from Hybrid Vehicle can be measured following domestic regulation. We found that test conditions and methods of an internal combustion engine could not be applied due to SOC and driving mode. As a result of this test, we can expect that this research will be used by reference guide in order to revise test specification.
산/알칼리 촉매에 의한 팔미트산 함유 유채유의 Biodiesel화
현영진(Hyun YoungJin),김해성(Kim HaeSung) 한국유화학회 2006 한국응용과학기술학회지 Vol.23 No.4
The esterification of palmitic acid in rapeseed oil and methanol emulsified by propylene glycol with PTSA(p-toluene sulfonic acid) was followed by the transesterification of rapeseed oil into biodiesel with 1(w/v)% GMS(glycerol monostearate) as an emulsifier using TMAH(tetramethyl ammonium hydroxide) catalysts at 60^{circ}C. The former reaction was optimized at the 1:20 of molar ratio of oil to methanol and 5wt% PTSA, and the latter was optimized at the 1:8 of molar ratio of oil to methanol and 0.8wt% TMAH. The overall conversion into biodiesel was 98% after 60min of reaction time at the 1:8 of molar ratio, 0.8wt% TMAH and 60^{circ}C. TMAH was a good catalyst to control the viscosity of biodiesel mixture.