• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 I
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• pp.557-560
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• 2003

The increase of vehicles stagnations leads to the increasing attention to the way customers pay and a large number of projects on electronic cash system. Tranport system is comprised of a number of advanced technologies, including information processing, communications, control, and electronics. Recently many research on a system which provides contact in order to protect driver's vehicle passage have been carried out. And some potential problems from that system are being reviewed by electronic cash system. In this papers, we suggest RF protocol developing technology using the concept of electronic cash. ATM electronic cash developing is consist of component of pre-developed coin throw, integration of component using its, and production of more requirement-satisfactory ITS solution. Result increase 15~40% pre-type vehicles stagnations. Especially, we expect this proposed concept would be well adapted to our national environments.

• 태양에너지
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• 제18권2호
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• pp.115-121
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• 1998

본 연구에서는 캐비티 상부에 작은 틈새를 두고 여기에 구동류를 흐르게 함으로써 캐비티 내부유동 특성을 주유동 방향에 대하여 고찰하였고 채택된 레이놀즈수에 따른 순간속도벡터와 시간평균 속도분포, 그리고 운동에너지를 구하였다. 또한 바닥면에서 공급되는 열유속의 변화에 따른 내부 유동장의 변화를 고려하여 캐비티 내부의 유동특성도 체계적으로 규명하였다. 캐비티 내부의 유동형태는 전체적으로 강제와류와 유사한 속도분포가 지배적이었다. 또한 바닥면이 가열될 경우에 열유속이 증가할수록 자연대류의 영향이 크게 나타났으며 발열량의 증가에 따른 부력의 영향이 크게 나타났다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 추계학술대회 논문집 학회본부
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• pp.364-366
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• 1995

We investigated the Electromigration characteristics in Cu alloyed Al line and the effect of Ti/TiN barrier layer on the characteristics. Test structures were fabricated by wafer level and 50% failure times were tested in the condition of j= 2 MA/$cm^3$, T= 300$^{\circ}C$. The reliability of Al line was improved which was 0.5%Cu Alloyed, but Ti/TiN under layer deteriorated the reliability while TiN over layer improved the characteristics.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2000년도 추계학술대회 논문집(Proceeding of the KOSME 2000 Autumn Annual Meeting)
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• pp.37-42
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• 2000

The flow characteristics of impinging jet flow are affected greatly by nozzle plate to distances. An sharp edge nozzle was used to achieve uniform mean velocity at the nozzle inlet, and its diameter is 10mm(d). Therefore, the flow characteristics on the impinging jet plate can be changed largely by the control of main flow. In the parent study, we investigate the effects of main flow length , its variable is nozle plate to distances( 12d, 10d, 8d, 6d and 4d).

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2000년도 춘계학술대회 논문집
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• pp.364-365
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• 2000

최근 주된 관심사로 대두된 대기오염규제 대상 물질인 휘발성유기화합물(VOCs)은 상온, 상압하에서 reid vapor pressure가 10.3kPa 이상인 탄화수소 물질로서 여러 형태로 대기중이나 수질중에 존재하고, 인간의 주변 환경 및 건강에 직접적으로 해를 끼친다. 간접적으로는 대기중 광화학 반응에 참여하여 오존($O_3$)을 생성시키거나 스모그 생성의 전구체로 작용한다. 우리나라에서는 1999년부터 대기환경보전법 제8조 2항 규정에 의한 대기환경규제지역(석유화학 정제업, 자동차 제조업, 주유고, 자동차 정비업소, 세탁시설 등)에서 VOCs를 규제토록 법제화하고 있다. (중략)

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권12호
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• pp.540-545
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• 2005

The transformer tank is pressurized by atmosphere at the time of vacuum oiling and, plastic deformation occurs at the section of stress concentration on transformer tank at this time. It is important to predict where the sections of stress are in order to prevent deformation and to add reinforcement. This paper presents prediction results where the sections of stress are occurred and whether plastic deformation occur or not, using structure analysis program(ANSYS-design program).

• 한국추진공학회지
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• 제11권2호
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• pp.47-53
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• 2007

본 논문에서는 초음속유동장 내에 분사된 2차 분사유동과 주유동의 상호작용에 의한 2차 분사노즐 주변에서의 열전달 현상을 관찰하였다. 벽면에는 등열유속조건을 주었다. 제트 자유유동간 운동량비(Jet to Freestream Momentum Ratio, J)에 따라 2차 분사를 초음속 유동장에 분사시켰으며, 적외선 카메라를 이용하여 2차 분사노즐 주변 벽면온도를 측정하였고, 이를 통하여 대류 열전달계수를 제시하였다.

• 대한기계학회논문집
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• 제19권9호
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• pp.2271-2282
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• 1995

Numerical simulations for the effects of secondary flow and turbulence diffusion on the particle concentration distributions have been carried out for the single stage electrostatic precipitator. The electrohydrodynamic secondary flow, particle concentration distribution and collection efficiency have been evaluated as a function of dimensionless parameters such as Re, $N_{end}$, $P_{e}$ x. The results of simulations show that for increasing secondary flow intensity the concentration distribution is drastically deformed and collection efficiency is decreased which is more than due to turbulent diffusion.n.n.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 C
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• pp.1445-1447
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• 1994

This paper deals with the edge effect in thin insulating films, focusing on their dependence on film thickness, so we derived a simple mathematical form which depicts that reducing film thickness lowers the field at the electrode edge. we expect that this result may be suitable to problems with multi level insulating films.

• 전자통신동향분석
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• 제35권2호
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• pp.69-78
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• 2020

Small portable devices such as mobile phones and laptops currently display a trend of high power consumption owing to their characteristics of high speed and multifunctionality. Low-power SoC design is one of the important factors that must be considered to increase portable time at limited battery capacities. Popular low power SoC design techniques include clock gating, multi-threshold voltage, power gating, and multi-voltage design. With a decreasing semiconductor process technology size, leakage power can surpass dynamic power in total power consumption; therefore, appropriate low-power SoC design techniques must be combined to reduce power consumption to meet the power specifications. This study examines several low-power SoC design trends that reduce semiconductor SoC dynamic and static power using EDA tools. Low-power SoC design technology can be a competitive advantage, especially in the IoT and AI edge environments, where power usage is typically limited.