• 한국해양공학회지
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• 제12권1호
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• pp.3-9
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• 1998

According to the developement of cities, electric wires and commuinication lines which are currently above the ground effect on the bad. Nowadays, it is necessary to build up underground facilities because the construction is increasing. Excavation work has been dominant even though the inconvenient things occurred, for example a civil appeal, a traffic obstacle, safety and spoiling the fine view because of the cost or period of the construction work. But the congestion of cities are more and more serious. Therefore shield-method is the way to escape from congestion. I considered all the construction fields which are in progress or finished.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 1부
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• pp.197-202
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• 2006

본 논문에서는 이러한 어려움에 대한 해결을 위해 우선 사용자가 가장 필요한 서비스를 어떻게 선정하는가에 대해 TELU 라는 기법을 사용하여 사용자 입장에서 필요로 할 만한 서비스를 선정하는데서 출발을 하였다. 이 유비쿼터스의 사용자 중심의 방법론은 T(시간) E(사건)L(장소)U(사용자)를 중심으로 주요 서비스의 영역을 설정하였다. 또한 유비쿼터스의 서비스는 성격상 미리 시뮬레이션을 하는 것이 매우 어려워서 실제 서비스 상황에서 사용자의 행동이 어떻게 될것인가를 예측하는 것이 애매한데 본 연구에서는 Role Play 이라는 기법을 도입하여 이러한 문제를 해결하려 하였다. 즉 TELU 를 통해 선정된 상황에 존재할 수 있는 다양한 인적/물리적 요소들을 파악하고 각 요소들의 역할을 실제 상황처럼 연출하고 수행함으로써 실제 상황에서 일어날 수 있는 사용자의 여러 행위들을 파악하였다. 이러한 방법은 기술위주가 아닌 사용자 중심의 유비쿼터스 서비스를 제안하는 방법으로 유비쿼터스 서비스가 단순한 '수행(Performance)'이 가능한 것이 아니라 인간이 더 큰 편익을 누리며 '사용(use)'할 수 있도록 돕는데 역할을 할 수 있을 것으로 기대된다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2013년도 추계학술대회 논문집
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• pp.188-189
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• 2013

본 연구에서는 군 항공용 레이더의 프로세서 유닛에 적용하기 위하여 $115/200VAC{\pm}10%$, 3상, 400Hz 및 +28VDC 입력, 최대 출력전력 488.5W, 효율 82%이상(@70%부하), 출력 전원 8개의 다중 출력 스위칭 전원공급기를 개발하였다. 개발 목표 효율인 82% 이상을 달성하기 위해 전력이 큰 3개의 출력에(+3.3V/55A, +5V/32A, +12V/10A) 대해 동기정류 하프브릿지 방식을, 나머지 소전력 출력은 다중 출력 플라이백 방식을 적용하여 설계 및 제작하였고, 시험 결과 70% 부하에서 83.3%의 우수한 효율 특성을 확인하였다. 또한, 군용 장비로써의 전자기 간섭 및 환경조건 만족 여부 확인을 위해 군사규격에 따라 신뢰성 시험을 수행하여 개발된 전원공급기의 신뢰성을 확인하였다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2001년도 제4회 압출 및 인발가공 심포지엄
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• pp.55-62
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• 2001

An electrolytic copper rod was drawn up to $90\%$ in area reduction and annealed under various conditions. The EBSD measurement of the drawn wire showed that in the center region the <111> + <100> fiber duplex texture was dominant, while in the middle and surface regions relatively defused textures developed with a little higher density in <11w>//wire axis. The inhomogeneous texture in the deformed wire gave rise to the inhomogeneous microstructure and texture after annealing. The annealing texture could be classified into the recrystallization texture developed during low temperatures and at the early stage at a high temperature and the growth texture developed after a prolonged annealing at the high temperature. The recrystallization temperature could be explained by the strain energy release maximization model and the growth texture was discussed based on the grain boundary mobility anisotropy.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1995년도 춘계학술대회 논문집
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• pp.77-80
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• 1995

Enhancing the electrical conductivity of the ultrathin organic films using Langmuir-Blodget technique is important step for the developement of molecular electronic device. The Octadecylviologen-TCNQ was synthesized with Octadecylviologen-Bromide an Lithium TCNQ Sine Octadecylviologen-TCNQ has two TCNQ snion radicals, the conductivity of LB film is expected to increase. The $\pi$-A isotherm showed that the limiting area was 150${\AA}$$\^$2/ molecule and the silid-like transition surface pressure was 25 mN/m. The electronic transition of the TNCNQ anion radical was observed at 400 nm. Intermolecular charge transfer absorption was observed at 600nm and 850~1050 nm which ay resulted from the TCNQ anion radical dimer formation. The electrical conductivity of the viologen -TCNQ LB film was 10$\^$-6/cm This values was 100 times higher than that of the quinolinium-TCNQ and pyridinium-TCNQ LB films.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1995년도 춘계학술대회 논문집
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• pp.216-219
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• 1995

One of the principal problems encountered in the use of glass fiber reinforced Plastic composites(GFRP) is to establish an active fiber surface to achieve maximum adhesion between resin and fiber surface. In order to develope new process to overcome the disadvantage of chemical agent, we have studied the effect of reactive plasma glass surface treatment on the electrical and mechanical properties of glass fiber reinforced epoxy composites. It is found that the electrical and mechanical characteristics of the composites treated with plasma is improved especially in the dielectric strength by 20% and tensile strength by 15%, whereas the tan $\delta$ is decreased significantly.

• 건축역사연구
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• 제4권2호
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• pp.65-78
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• 1995

The reasons why the urban and architectural environment in Korea has become distorted in spite of many cases of experience in developement for last 30years, are deeply rooted in rather having disregarded or omitting the importance of the evaluation than the shortness of the skill or techniques. So now it requires strongly setting new context to improve the recent urban architectural evironment by arranging the confused problems and finding the hidden ones before the real and practical evaluation. The new context proposed in this paper is composed of three contents, that are economics, function, and culture.

• 전자공학회논문지B
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• 제33B권4호
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• pp.81-90
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• 1996

In this paper, we implemented a computerized pulse diagnosis system for the developement of pulse diagnosis algorithms and the generalization of the pulse diagnosis. The system consists of the hardware and software. The hardware detects pulse waves and inputs the waves into the computer system, while the software not only manages and analyzes the input pulse wave data but also privides the database. In order to clinically test the developed pulse diagnosis system, we applied the carotid-radial pulse diagnosis algorithm to the system. As the results, it is found that the genralizatio of the pulse diagnosis is possible.

• 한국전자통신학회논문지
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• 제7권4호
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• pp.897-904
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• 2012

이 논문은 사이버공간에서 비즈니스를 시작하고 확장해가는 과정을 로드맵으로 제안하였다. 사이버 비즈니스가 성공하기 위해서는 사이버공간의 특성, 비즈니스의 특성 그리고 사업자 자신의 상황이 조화롭게 통합되어야 하는데, 그 통합 과정을 로드맵으로 함축시켰다. 제안하는 로드맵은 사이버공간의 특성에 대한 이해의 점진적 확장과 더불어 사이버 비즈니스를 점진적으로 확장해 가는 방법을 지향하고 있다.

• 한국생산제조학회지
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• 제4권3호
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• pp.58-66
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• 1995

It is very important to test motion accuracy and performance of NC machine tools as they affect that of all other machines machined by them in industry. In this paper, in has become possible to detect errors of linear displacement of radial direction for circular motion test using newly assembled magnetic type of linear scales so called Magnescale ball bar system, and to calculate time interval getting error motion data and revolution angle of circular motion in machining center using tick pulses come out from computer. And a set of error data gotten from test is expressed to a plot by computer treatment and to numerics of error motion by statistical treatment and results of test are compared with those of Renishaw ball bar system.