• 공학교육연구
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• 제20권4호
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• pp.28-37
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• 2017

The purpose of this study was to analyze the current status of team learning in engineering education. For this, literature review and survey were used. The survey was conducted with 16 professors and 627 students in engineering college. Based on the results, team should be organized in consideration of various characteristics and competencies for effective team learning activities in engineering education. And in the team learning operations, it is necessary to make the conditions for students to immerse in team learning through the activation of communication of team members, tightening management of free riding in team learning, and optimizing team learning period. It is necessary to use the team learning evaluation method in harmony with the team, individual and peer evaluation.

• 대한미세수술학회:학술대회논문집
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• 대한미세수술학회 1992년도 제12차 학술대회
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• pp.80-81
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• 1992

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.776-779
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• 2005

Liquefied Natural Gas takes up six hundredths of the volume of natural gas, which makes storage and transportation much easier. To send out natural gas via a pipeline network across the nation, high pressure LNG pumps supply highly compressed LNG to high-pressure vaporization facilities. The Number of high Pressure LNG pumps determined the send out amount in LNG receiving terminal. So it is main equipment at LNG production process and should be maintained on best conditions. In this paper, to find out the cause of high beat vibration at cryogenic pumps, vibration and motor current analysis have been performed. And high beat vibration of cryogenic pumps could be reduced due to the modification of motor rotor.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.281-286
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• 2007

Needs of fuel's performance evaluation for the dual-cooled fuel pellet (annular shape) necessitate the irradiation test in the test reactor. Irradiation test rig for the HARARO reactor, which is a special-purposed equipment used for material, irradiation and creep test, must satisfy the operational requirement on the hydraulic characteristics and structural integrity. In this paper, pressure drop and flow-induced vibration test for the newly developed non-instrumented test rig were carried out using FIVPET as a out-pile evaluation test. The test results show that the new test rig satisfy the HANARO operational requirement with sufficient margin. The spectral response characteristics of the flow-induced vibration of the test rid were also discussed.

• 한국소음진동공학회논문집
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• 제21권9호
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• pp.850-857
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• 2011

Generally, sound-absorbing materials in vehicles are used for giving the comfort to passengers by reducing noise while driving. Materials of which targets are light weight, high performance, eco friendliness and recycling have been developed recently. In this study, sound-absorbing materials using PET(polyethylene terephthalate) hollow fibers to achieve the light weight and the high sound absorption performance are developed, and then evaluated to meet a requirement for the automotive components. The test results show that the acoustic performances of developed products having new fiber structure are better than those of the conventional product.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 1989년도 수공학논총 제31권
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• pp.89-94
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• 1989

본 연구는 하천 수질의 종합관리를 위한 sotware 시스템과 hardware 시스템을 개발하는 것이다. Software 시스템은 하천의 오염실태 조사분석 자료를 활용하여 예측모형의 반응식과 제 계수를 도출하고, 수질변동 및 예측모형의 중요지표 수질인자들에 대한 시각적 화면 display 를 위한 그래픽 모듈과 우리나라 오염심화 하천에 알맞는 종합수질 관리용 컴퓨터 프로그램을 개발하므로서 궁극적으로 하천의 한정된 수자원의 최적 활용을 위한 정량적, 정성적 종합수질 관리 시스템을 개발하는 것이다. 또한, Hardware 시스템은 지표 수질인자들을 자동 측정하여 on line, real time 으로 운영 될수 있는 computer supported monitoring network system 과 수질관리를 위한 지역적 수질정보를 위한 network system 을 연구하므로서 control computer system 및 programmable process controllers system 을 구축하고자 한다.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2011년도 춘계학술발표회
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• pp.162-163
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• 2011

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2011년도 춘계학술발표회
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• pp.204-205
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• 2011

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.694-697
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• 2005

A conceptual study about the angle information based orbit determination technique for a geostationary satellite was performed. With an assumption that the simultaneous observing of the earth and nearby stars is possible, we confirmed that the view angles between the earth and stars can be use as inputs for orbit determination process. By the MA TLAB simulation with least square method, the convergence is confirmed. This conceptual study was performed with the COMS for instance. This technique will be able to use as a back-up of ground station's orbit determination or a part of autonomous satellite operation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.1774-1775
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• 2011

퍼지이론은 비선형적 데이터의 취급에 있어 강력한 수단이 될 수 있으며, 본 논문에서는 퍼지시스템을 인간의 후각을 모사한 GAS 식별 시스템의 설계에 적용하였다. 먼저, 다수의 센서들의 특성 분석에 따라 GA를 이용하여 그룹화를 시킨 후 각각의 그룹들에서 나타나는 데이터들의 특성에 맞게 퍼지시스템을 설계하여, 센서들의 유동적 특성에 따른 조합과 퍼지시스템의 비선형 데이터에 대한 기술능력을 모두 수용할 수 있는 식별 시스템을 설계하였다. 마지막으로 성능 검증을 통해 하나의 퍼지시스템을 선택함으로써, 유동적 특성이 큰 센서들의 성능을 배제할 수 있도록 하여 보다 정확한 식별이 가능하도록 시스템을 설계 하였다.