• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.702-707
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• 2007

A Color Discerning Device(CDD) is the equipment to use in a Rice Processing Complex(RPC). A CDD can sorting discolored grain according to light and shade. The existing a CDD's driving performance is not so good as overseas machine. Besides, transportation process causes a defect in the mechanism from impact or harmonic excitation or etc. This study is represented the problem of CDD through experiment and simulation on a CDD. To analysis the problem of driving condition, devide each part of CDD for performed modal analysis. The problem of driving of driving condition and transportation process solved by carry out modal analysis and static analysis.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.571-576
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• 2006

A Color Discerning Device(CDD) is the equipment to use in Rice Processing Complex(RPC). By use a high-speed charge-coupled device camera, CDD can sorting discolored grain according to light and shade. The existing CDD's driving performance is not so good as overseas machine. Besides, transportation process causes a defect in the mechanism from impact or harmonic excitation or etc. This study is represented the problem of CDD through modal analysis and static analysis by using ANSYS workbench. To analysis the problem of driving condition, devide each part of CDD for performed modal analysis. The problem of driving condition and transportation process solved by carry out modal analysis and static analysis.

• 설비공학논문집
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• 제26권9호
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• pp.434-440
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• 2014

Experiments were performed to verify if performance and characteristic curves obtained from the temperature differential defrosting method, where surface temperature is measured to judge defrosting condition, can be reproduced by the photoelectric technology where defrosting condition is judged by photoelectric sensors. The output voltage of a phototransistor and heating capacity, power consumption, and surface temperature of the outdoor heat exchanger are compared. The results showed that the photoelectric sensors can be used as a defrost control device. On-off control timings in temperature differential defrosting method are in good agreement with those predicted by the high and low threshold output voltages of the photoelectric sensor.

• 대한인간공학회지
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• 제26권2호
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• pp.89-102
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• 2007

Generally, it is well known that driving in tunnel imposes large burden to driver because of spatial constraint, limited visual field and so on. And such a burden of driver result in high accident occurrence. In this reason, studies dealing with features of driving and traffic flow in tunnel have been performed. However, information about characteristics of drivers and traffic in a very long tunnel is not accumulated yet. The purpose of this study is to identify the relations between tunnel length and burden of driver, driving patterns, traffic flow characteristics using the tunnel simulator that realizing various tunnel situations. For this, the tunnel simulation program was developed along 11km-length section. And biological data of 10 subjects gained from driving condition in simulation program was analyzed and compared with the result of real driving condition.

• 대한토목학회논문집
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• 제33권1호
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• pp.241-249
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• 2013

"교통약자의 이동편의 증진법"이 제정됨에 따라, 각 지자체에서는 교통약자의 이동권을 보장하고자 다양한 노력을 해오고 있다. 그러나, 지역여건 및 교통수단 특성 등 교통약자의 교통수단 도입과 관련한 주변 상황은 고려되지 않아 교통약자 이동편의 증진 시책은 그 실효성이 매우 미흡한 상태이다. 따라서, 본 연구에서는 부산광역시를 대상으로 행정동별 경사도와 저상버스 운행여건, 특별교통수단 이용실태 등 교통약자의 교통수단 이용특성을 고찰하였다. 또한, 교통약자의 교통수단 이동지수 개념을 도입하여 지역별 교통약자의 교통수단 이용여건을 수량화하여 비교분석함으로써 지역특성에 부합하는 교통약자의 교통수단 이용편의 증진방안을 제시하였다.

• 한국인터넷방송통신학회논문지
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• 제13권5호
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• pp.173-181
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• 2013

본 논문은 복합상품 운송 문제의 최적해를 구하는 단순한 발견적 방법을 제안한다. 제안 알고리즘은 첫 번째로, 복합상품 중개운송 문제인 경우 일반적인 운송 문제로 변환시킨다. 이 과정에서 중개지를 공급지로, 중개지의 수용량 제약조건을 공급량으로 치환한다. 다음으로 단일 상품으로 분해한다. 두 번째로, 복합상품 운송문제인 경우 상품별로, 복합상품 중개운송 문제인 경우는 직접 열 (수요지) 기준으로 최소 비용을 선택한다. 행 (공급지) 기준으로 선택된 비용 오름차순으로 공급량, 수용량과 요구량 제약조건을 만족하도록 수송량을 배정한다. 주어진 요구량을 모두 만족할 때까지 이 과정을 반복한다. 이렇게 얻은 초기해에 대해 세 번째로, 수송비용을 감소시킬 수 있는 조건을 만족하면 배정량을 조정한다. 이와 같이 단순한 알고리즘을 2개의 복합상품 운송 문제와 3개의 복합상품 중개운송 문제에 적용한 결과, 선형계획법으로 최적해를 제시한 3개 문제 중 2개 문제에서 최적해를 개선하는 효과를 얻었다. 결국, 제안된 알고리즘은 선형계획법을 적용하는 방법보다 좋은 알고리즘으로 판명되었다.

• 대한교통학회지
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• 제31권1호
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• pp.15-24
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• 2013

국내 도심지역에 대하여 인구 집중현상의 대안으로 복합용도의 초고층건축물이 입지하는 추세에 따라 급격한 유발수요의 증가가 예상되며 이는 주변의 교통문제 발생의 원인으로 작용한다. 따라서 초고층건축물이 입지 후를 고려하여 대중교통 활성화, 주차 상한제 등을 통한 교통수요억제 등의 정책을 제시하고 있으나 교통기반시설에 대한 정량적인 대안이 부족한 상황이다. 이에 본 연구는 초고층건축물의 규모, 용도에 대해 분류하고 각각에 따른 수단분담률을 조정하여 수단별 유발수요를 산정하였다. 도로의 경우 가로망 지체를 통하여 조건에 따른 평균변화량을 산출하였고 대중교통의 경우 노선수를 통한 적정 시설 규모를 판단함으로써 초고층건축물에 따라 적절한 대안을 제시 가능할 것으로 판단된다.

• 대한교통학회:학술대회논문집
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• 대한교통학회 2007년도 제56회 학술발표회논문집
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• pp.459-468
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• 2007

• 농촌계획
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• 제14권3호
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• pp.27-36
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• 2008

Rapid increase of aging population and progressed migration from rural areas to urban areas have caused deficit of bus routes in local cities. This increasing burden of operation deficit affects the movement strategy of the transportation vulnerable who are using buses. Along with dramatically increased aging in Korea, there is an urgent need to implement a new method which can guarantee mobility rights of public transportation especially for the elderly. This study focuses on the case of Demand Responsive Transit(DRT) system that has been operating in America, Europe, Japan, etc. Kimhae(Sangdong-myeon and Saengnim-myeon) is selected as a study area. This study investigated the possibility of adopting DRT system on the perspectives of the consumer and provider by the analysis of traffic condition such as the number of transportation vehicles, present bus service and regulation and conduct of questionnaire survey which includes present bus service and DRT system and so on. In conclusion, DRT system in Kimhae city will reduce transport cost, increase affordability through the betterment of service level and secure mobility rights for the transportation vulnerable.

• Current Photovoltaic Research
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• 제5권1호
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• pp.9-14
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• 2017

The screen printing technique is one of process to form electrode for crystalline silicon solar cell and has been studied a lot, because it has many advantages such as low price, high efficiency and mass production due to simple and fast process. The reason why electrode formation is important is for influence of series resistance and amount of incident light in crystalline silicon solar cell. In this study, electrode was formed by screen printing method with various conditions like squeegee angle, printing speed, snap off, printing pressure. After optimizing various conditions, double printing method was applied to obtain low series resistance and high aspect ratio. As a result, we obtained electrode resistance 45.31 ohm, aspect ratio 4.38, shading loss 7.549% mono-crystalline silicon solar cell with optimal double screen printing condition.