• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.850-851
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• 2015

In this paper, it employs IPMSM sensorless methods about current model and Extend-EMF methods. By using a MATLAB/Simulink program, it presents sensorless method in relation No high frequency voltage and replaces current based sensorless method. This IPMSM motor is drived by MTPA and Flux weakening controls for adjusting a actual motor application. In order to improving stability of IPMSM sensorless control, method about Sensorless estimation change is suggested by this paper.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.170-176
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• 2003

The pantograph for Korean High Speed Train was developed and had been evaluating by through "G7- R＆D for home grown high speed train technology". In this study, a relation in mechanical aspect between the train running speed and the current collecting performance of the pantograph is conducted.'for this study, a measuring system for current collecting performance and mechanical characteristics is developed and installed on the prototype Korean High Speed Train, and measurement is conducted while the train runs on the test track. The measuring system is composed of video monitoring system and telemetry & data processing unit. It monitors whether the hazard behavior in the pantograph is occurs or not, and measures acceleration and vertical contact force between the pan head and catenary. Through this study, evaluation of a mechanical vibration characteristics and trend of the pantograph and a interface performance of pantograph - catenary up to 200㎞/h train speed are facilitated.

• 한국축산식품학회지
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• 제36권5호
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• pp.577-582
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• 2016

Despite several issues in relation to human health, beef is still a most popular meat product among large section of society due to the presence of high quality protein and other nutrients. The current paper reviews numerous studies that provide nutritional profiles and health implications of high marbled beef consumption. In relation to lipid content of beef, intramuscular fat contains high level of PUFA and MUFA compared to other beef fat. Level and composition of intramuscular fat varies depending on breed and feeding regime. Literature suggests that the marbling is more complex than the development of subcutaneous fat and marbling not only provides good fatty acids but also contributes to the higher eating quality of beef. Finally, the current work emphasize that meat plays a pivotal role in nutritious diets, high quality marbled beef is not only of excellent eating quality but also contain more beneficial fatty acids.

• 한국초전도ㆍ저온공학회논문지
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• 제12권1호
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• pp.12-16
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• 2010

Critical current - magnetic field ($I_c$-B) relation is one of the basic properties of an HTS wire, which is needed for the design of performances of superconducting devices. Experimental results of the $I_c$-B relation of Bi-2223 and YBCO superconducting wire are presented in this paper. n-value is also an important parameter which is needed to calculate the electric field by using the power-law. Measurement results of the n-value of the same HTS superconducting wires are also presented.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2009년도 춘계학술대회
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• pp.235-242
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• 2009

The positive promotes the company activity of the disabled person from the research which sees hereupon and raises in order to plan the competitive power improvement of the disability firm our country and including observes comparison investigates the current point of disability firm relation policies from the dimension which is synthetic and seeks character does disability firm relation politic types and the disability firm policies of advanced nation and the economic social positions of the disability firm.

• 대한안전경영과학회지
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• 제3권1호
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• pp.81-91
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• 2001

In supply chain management, coordination between a manufacture and suppliers Is regarded as the most important issue when partnership of organizations of considered. This paper Introduces the current status of SCM in terms of physical systems, relation with other solution systems as well as the general history and definitions of SCM. Researches are categorized into deterministic, stochastic, and several future research areas are discussed in the paper.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2006년도 Proceedings of The Convention
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• pp.69-77
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• 2006

• 대한전자공학회논문지
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• 제9권5호
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• pp.34-42
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• 1972

전류잡음은 탄소피막고정저항기의 품질을 나타내는 중요한 척도이다. 저항체피막상의 결함은 전류밀도의 불균형을 초래하고 결과적으로 전류잡음의 기대를 유발한다. 전류잡음의 크기는 저항재의 고유한 성질과 저항체의 처리, 조립 및 외장 등에 의한 여러 요인에 의존하고 있으나 각종 수명시험결과 저항기의 전기적특성과 전류잡음문에는 명백한 관계가 성립하고 있다. 대표군의 저항기에 대한 전류잡음지수의 정규분포를 표시하는 parameter를 해석하면 제품의 품질관리와 생산의 균일성을 판단하는 지표로서 매우 유용한 수단이다.

• 대한전자공학회논문지
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• 제17권2호
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• pp.10-14
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• 1980

본 논문에서는 DH-laser diode의 threshold current를 계산하기 위하여 2차고조파 왜곡 (se cond harmonic distortion)에 대해 Rate 방정식 (Rate-equation)을 동적상태와 정적상태 방정식으로 연릴하여 계산하였다. 특히 고조파 왜곡 ( )을 계산하는데 바이어스 전류 에 대하여 변조 전류 을 변조계수 m으로 놓고 (Jm=mJo)계산하여 주입전류 J가 Jth에서 2차 고조파 왜곡이 최대치를 가짐을 보여 ,이제까지 알려진 Jth조사 방법보다 간편하고 정확하게 조사할 수 있음을 제시하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 추계학술대회 논문집
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• pp.501-504
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• 1999

The polymer insulators which are installed on outdoor have a great advantage than porcelain and 71ass, due to suppression of leakage current, light weight, low cost, etc. It needs variable evaluation methods for application of these insulators on service. The analysis of measuring leakage current is useful for ageing diagnosis because of monitoring in real-time. In this paper, we look over the recovery of hydrophobicity of silicone rubber in mini salt-fog chamber with leakage current monitoring. also, we understand the relation of between hydrophobicity and leakage current and discuss on method of leakage current monitoring.