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김대광(Daekwang Kim),이준용(Junyoung Lee),최명식(Myungsik Choi),김광연(Kwangyeon Kim),김성태(Sungtae Kim),이승표(Seungpyo Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
A lot of research has been done on internal combustion engine to reduce fuel consumption and emission. One field is being researched today is to recuperate from kinetic energy to electric energy as a vehicle deceleration status. More energy recuperation can be reduced fuel consumption. To recuperate the more electric energy, this study was applied to the high power alternator and AGM battery device and optimized voltage control. This kind of system is new generation alternator management system. The result of fuel economy test for this system showed an about 0.8~4% improvement effect.
Daekwang Kim,이희구,정형일,강성호 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.5
The immobilization of proteins and their molecular interactions on various polymer-modified glass substrates [i.e. 3-aminopropyltriethoxysilane (APTS), 3-glycidoxypropyltrimethoxysilane (GPTS), poly (ethylene glycol) diacrylate (PEG-DA), chitosan (CHI), glutaraldehyde (GA), 3-(trichlorosilyl)propyl methacrylate (TPM), 3'-mercaptopropyltrimethoxysilane (MPTMS), glycidyl methacrylate (GMA) and poly-l-lysine (PL).] for potential applications in a nanoarray protein chip at the single-molecule level was evaluated using prism-type dual-color total internal reflection fluorescence microscopy (dual-color TIRFM). A dual-color TIRF microscope, which contained two individual laser beams and a single high-sensitivity camera, was used for the rapid and simultaneous dual-color detection of the interactions and colocalization of different proteins labeled with different fluorescent dyes such as Alexa Fluor 488, Qdot 525 and Alexa Fluor 633. Most of the polymer-modified glass substrates showed good stability and a relative high signal-to-noise (S/N) ratio over a 40-day period after making the substrates. The GPTS/CHI/GA-modified glass substrate showed a 13.5-56.3% higher relative S/N ratio than the other substrates. 1% Top-Block in 10 mM phosphate buffered saline (pH 7.4) showed a 99.2% increase in the blocking effect of non-specific adsorption. These results show that dual-color TIRFM is a powerful methodology for detecting proteins at the single-molecule level with potential applications in nanoarray chips or nano-biosensors.
Air Conditoining System이 차량 모드 주행 연비에 미치는 영향 연구
김대광(Daekwang Kim),조근진(Geunjin Cho),박진일(Jinil Park),이종화(Jonghwa Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
Fuel efficiency is the one of the major issues in the aspect of energy. environment. As customers desire more comfortable vehicles, increases of accessory traction forces are necessary. Air conditioning system (ACS) consumes the biggest traction forces among accessories, especially during summer. This means ACS is the primary object deteriorating fuel economy among accessories. Since direct measurement of traction force and fuel consumption in practical vehicle is difficulties, comparison analyses are taken between vehicle with ACS working and without ACS. For this comparison. real time measurements are carried out to know ACS traction force and fuel consumption. As a result of the comparison, a vehicle without ACS operation was 15.92% superior to a vehicle with ACS operating. It could be used as a fundamental material for improvement ACS for better fuel efficiency.
김대광(Daekwang Kim),정민영(Minyoung Jung),이준용(Junyong Lee),김광연(Kwangyeon Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
A lot of research has been done on power train cooling system to reduce fuel consumption and emission. Known engine cooling techniques are an electric water pump with an electric thermostat, an electric water valve, a clutch water pump and so on. The common approaches to enhance fuel economy among these techniques are fast warm up and control coolant temperature high. This paper discuss the amount of fuel economy enhancements on a engine with fast warm up technique, control coolant temperature high, control automatic transmission fluid temperature high.
우대광(Daekwang Woo),남경탁(Kyungtag Nam),김영길(Younggil Kim),김광수(Kwangsu Kim),강윤호(Yunho Kang),김태성(Taesung Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The particle formation using pyrolysis has many advantages over other particle manufacturing techniques. The particles by pyrolysis have relatively uniform size and chemical composition. Also, we can easily produce high purity particles. Thus, we studied the formation of silicon particles by pyrolysis of 50% SiH₄ gas diluted in Ar gas. A pyrolysis furnace was used for the thermal decomposition of SiH4 gas at 800℃ and atmospheric pressure. The aerosol flow from furnace is separated into two ways. The one is to the Scanning Mobility Particle Sizer (SMPS) for particle size distribution measurement and the other is to the particle deposition system. The produced silicon particles are deposited on the wafer in the deposition chamber. SEM measurement was used to compare the particle size distribution results from the SMPS. Depending on the experimental conditions, particles of high concentration in the 30~80 ㎚ size range were generated.