• 한국전자통신학회논문지
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• 제2권1호
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• pp.62-66
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• 2007

본 논문은 Wibro 시대를 맞아 차량내에서 인터넷이 가능하고 다양해지는 자동차 시스템에 적응하고 사용자가 자동차를 스스로 진단하고 이상이 생겼을 때 스스로 저장하여 자동차 정비소에 갔을 때 정확한 판단을 하여 신속하게 처리 할 수 있게 해 주며 자동차에 대해서 잘 모르는 운전자에게 정확한 정보를 제공한다. 주행 중에 자가 진단을 위해 임베디드 리눅스 시스템을 구축하고 자동차 와 진단 시스템의 통신을 위해 캔과 RS232 통신을 위한 EML327를 통해 통신을 한다. 그리고 미디어 플레이와 웹서버를 포팅하여 사용자 어플리케이션을 제공한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전력기술부문
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• pp.285-286
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• 2008

The Gas Circuit Breaker for the Main Transformer of voltage, 154kV at the ist Hapcheon hydraulic power station, break down by the falling of a thunderbolt from now, let's improve the efficiency on the maintenance of generating equipment by studying about the cause and the method for this problem.

• Korean Journal of Mathematics
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• 제17권4호
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• pp.349-359
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• 2009

As students have been familiar to Internet or media which has big visual effects rather than letters, they preferred the class in computer lab to theoretical class. The class in computer lab showed all the students good reactions in concern and interest. Statistics achievements of high level students in 2008 became better than that in 2007 but those of low level students became worse than that in 2007. I analyze the reason why the achievements of low level students have become worse. The purpose of this study is to supplement of the trouble of the class in computer lab and find out a better teaching and develop mathematics education's satisfaction and qualification.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.2156-2159
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• 2011

본 연구에서는 접지시스템으로 부터 다양한 서지 및 노이즈 신호를 측정 진단하여 시스템에 오동작을 유발하는 원인을 규명하여 안정된 설비 운용을 확보한다. 오동작 및 설비 손상의 원인이 되는 노이즈 전류 및 간섭 현상을 제거하기 위해 운용중인 접지시스템의 성능 및 구조적 문제점을 데이터로 실측하였다. 진단 분석 결과를 이용하여 개선된 성능의 접지시스템 및 배선 구조를 제안하여 시공하였고, 개선 효과를 검증하기위해 시공 후 설비의 운용 상태 하에 접지 노이즈 신호를 재 측정하여 개선 전 측정 결과와 비교 분석하여 개선된 성능을 최종 확인하였다.

• 한국군사과학기술학회지
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• 제16권3호
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• pp.268-276
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• 2013

The objective of this paper is to give a general understanding for the development flight test of Korean Utility Helicopter(KUH). This paper contains the contents of detailed flight test plan, the type of flight test, an introduction to main flight test area, and the overview of flight test results. At the beginning, more than 8,500 test points were identified for airworthiness certification to show the compliance for the KUH development requirements. However, the number of flight test points were optimized to 7,800 at the end. To accomplish the test objectives, about 860 flight test sorties had been performed, and more than 1,000 test sorties were consumed for trouble shooting. This paper also describes some major issues faced during development flight test phase.

• 한국주거학회논문집
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• 제13권6호
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• pp.141-150
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• 2002

The disabled peoples increase in number by disasters from the industrialization and urbanization. The physically handicapped people experience many difficulties in using the facilities in the public buildings. So, this survey proposed the necessary conditions for the handicapped peoples to use without any trouble in public buildings. The objects of investigation were public buildings, village offices, a public library, synthesis hospitals banks, an express bus station, a wedding building, a railroad station etc.. Conclusions were as follow \circled1 The most of buildings were established access road in regulations but parking area was established inappropriately in regulations \circled2 The most of convenience facilities were concentrated on first floor but were established barely in more than second floor. \circled3 The most of convenient facilities were established in appropriately in regulations. \circled4 The other convenient facilities(reception desk, ticket agency, work desk etc.) were not established nearly in the buildings of investigation.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 춘계학술대회논문집
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• pp.325-330
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• 2005

최근 제어설비 계통은 전력변환장치와 센서의 사용이 증가하여 많은 노이즈가 발생되고 있다. 이 노이즈로 인해 설비의 오동작과 제어 회로의 메모리 손실이 발생된다. 따라서, 본 논문에서는 제어설비 계통의 노이즈 발생량을 계측 분석하였고, 이에 따라 NCT, 등전위 접지, PNR, 노이즈필터와 같이 노이즈 감소를 위한 효과적인 보호설비를 적용하였고 계측 결과를 제시하였다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2002년도 학술대회논문집
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• pp.139-145
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• 2002

Recently, power-electronics equipments or machine that microprocessor is included and computers have been installed continuously in industrial process or region of electronics customer. So concern for power quality, especially sags has been increased. Because those equipments are very sensitive to sags. The sag is phenomenon that magnitude of load voltage temporarily decreases because of power system fault. If a certain equipment in industrial process have any trouble result from sag, it can cause utility to be charged for enormous economics loss. Therefore it need to analyze the characteristic of sag and then mitigation method for sags in distribution system in odor to increase reliability. This paper gives an overview of sags characteristic due to short circuit fault in distribution system and after a general discussion of the various forms mitigation, gives a sags mitigation method with concentrating on changing the distribution system like spot network, on-site generation.

• The Journal of Korean Physical Therapy
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• 제9권1호
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• pp.81-87
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• 1997

Although most of Korean PT professors and clinical lecturers has been thought the importance of the PT student's clinical practice, there has got a lot of training problems in clinical field. As the result, of our survey study pointed out trouble of the (1) training duration (2) training credits (3) training evaluation (4) training workbook (5) training fee (6) training hospital numbers and (7) training quality etc, in Korean today's situation. So we suggest the Internship-training system for above half a year after student has got a PT licence, as a desired training model.

• 전기학회논문지
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• 제58권6호
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• pp.1071-1077
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• 2009

Because several winds cause the a fault of transmission supply, KEPCO trys to protect the the trouble and supply the power stably. Kepco find out the weak mountains by winds and strengthen the power equipment annually. Power quality is the competition power in the international world and satisfy the customer using th power Therefore this paper deals with the fault relation between winds and transmission line.