• 한국도로학회논문집
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• 제16권1호
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• pp.111-118
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• 2014

PURPOSES : This study performs fundamental research on ramp-metering design criteria. METHODS : We carefully review previous studies in terms of ramp-metering design criteria and then consider applicability in Korea. For this, traffic simulation model is employed to analyze actual effect according to specific location of stop-line when implementing ramp-metering. RESULTS : When a stop-line moving forward with a 50m interval, travel speed at mainline relative to current stop-line location tends to decrease. However, traveling speed at approach roads increase about 5~18% under the same condition. When a stop-line location moving backward with a 50m interval, mainline travel speed increase approximately 17~32% whereas traveling speed at approach roads decrease. All cases are compared with the current stop-line location. CONCLUSIONS : We believe that both cases are useful with respect to freeway management. For example, moving forward a stop-line case can be used management for queuing area at ramp section and approach roads. Moving backward a stop-line case can be used for traffic control, focusing on mainline of freeways.

• 한국실내디자인학회논문집
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• 제14권6호
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• pp.236-243
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• 2005

The pre-examination closely beforehand relation between the articles on exhibition and visitors, the visitors and exhibition space, the exhibition space and the articles on exhibition, and the acceptance of various requirements are the matters you should consider in the initial stage when planning the establishment of a museum. Especially, the clear guideline for the layout of exhibition to meet the intention of spectators considered based on the seeing behavior in the exhibition hall (i.e. they see the articles on exhibition in order passively under instructions of the museum or select them by themselves positively etc.), and the moving line of appreciation and the exhibition type seems to be not yet prepared sufficiently. This study can be defined as the study of fundamental background for the architectural guideline for the characteristics of visitor's behavior, the selected moving line in the exhibition hall, the layout against the forced moving line and the type of exhibition space. As a part of this study, we carried out the research and the study for how the movement of visitors and the characteristics of seeing behaviors according to the type of the moving line are shown, based on the type of moving line for seeing suggested by David Dean.

• International Journal of Control, Automation, and Systems
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• 제2권1호
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• pp.55-67
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• 2004

In this paper, an active vibration control of a translating steel strip in a zinc galvanizing line is investigated. The control objectives in the galvanizing line are to improve the uniformity of the zinc deposit on the strip surfaces and to reduce the zinc consumption. The translating steel strip is modeled as a moving belt equation by using Hamilton’s principle for systems with moving mass. The total mechanical energy of the strip is considered to be a Lyapunov function candidate. A nonlinear boundary control law that assures the exponential stability of the closed loop system is derived. The existence of a closed-loop solution is shown by proving that the closed-loop dynamics is dissipative. Simulation results are provided.

• Structural Engineering and Mechanics
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• 제66권3호
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• pp.387-397
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• 2018

In this paper, a general closed-form solution for evaluating the dynamic behavior of a Timoshenko beam on elastic foundation under a moving harmonic line load is formulated in the frequency-wavenumber domain and in a moving coordinate system. It is found that the characteristic equation is quartic with real coefficients only, and its poles can be presented explicitly. This enables the substitution of these poles into Cauchy's residue theorem, leading to the general closed-form solution. The solution can be reduced to seven existing closed-form solutions to different sub-problems and a new closed-form solution to the subproblem of a Timoshenko beam on an elastic foundation subjected to a moving quasi-static line load. Two examples are included to verify the solution.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.863-866
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• 2008

For the cost reduction in the fabrication of display panels, a reverse moving system was equipped to a compacted in-line wet etch/cleaning system. For the effect of the alternating movement of substrate on the wet etch process, ITO layers were etched in various moving modes of substrates and the results were compared and analyzed.

• 제어로봇시스템학회논문지
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• 제14권4호
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• pp.327-331
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• 2008

An in-line wet etch/cleaning system was established for the research and development in wet etch process as a formation of electrode such as metal or transparent conductive oxide layer. A reverse moving system was equipped in the in-line wet etch/cleaning system for the alternating motion of glass substrate in a wet etch bath of the system. Therefore, it was possible for the glass substrate to be moved back and forth and it was possible to reduce the size of the system by using the reversing moving system. For the effect of the alternating motion of substrate on the etch rate in the in-line wet etch bath, indium tin oxide(ITO) patterns were obtained through wet etch process in the in-line system in which the substrate was moved back and forth. From the CD(critical dimension) skews resulted from the ADI CD and ACI CD of the ITO patterns, it was concluded that the alternating motion of glass substrate are possible to be applied to the mass production of wet etch process.

• Design & Manufacturing
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• 제10권2호
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• pp.39-43
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• 2016

Most of automobile parts manufactured through sheet metal forming are mass-produced by using press mold. In recent years, automation and speeding up of press lines have been expanding to maximize product productivity using a press die. The proportion of the moving time in the press line is high, and therefore requires high-speed and automated equipment for the moving process. In this paper, to provide the double-moving system can be the moving time reduction and increased productivity. Developed transport system consists of the material supply, the material feeding device and the PLC controller and the devices are positioned between each of the pressing process. In this paper, the double-moving system including developed units using a multi-axial single-acting through this reduced the C/T(cycle time) and improved the productivity.

• 한국조경학회지
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• 제25권3호
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• pp.25-34
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• 1997

As you know, there are a lot of our own traditional folk village exist in Korea, our country. Most people just know is that Korean traditional village is just happen make it and just continuously keeping this times type. But this village is not just make it but made by serious scientific sources such as, rule of locating streets. There are three very important reasons why I research this topic for my research paper. The first important reason is that Korean traditional villages have the pattern of human moving line system in accordance with hyung-kug. Hangae village that located on inclined ground named baesanimsu has the longer human moving line than Hanbam village that located on level ground. The second important reason is that Korean traditional villages have the smaller human moving line of the length and the amplitude as long as going inside villages. But the unit of the amplitude is the larger. Hanae and Hanbam village is the same pattern. The third important reason is that Korean traditional villages have the smaller human moving line of the length and the amplitude as long as having the larger gradient. Hangae and hanbam village is the same pattern. And Hanbam village hast he bigger human moving line of the length, the amplitude and the unit of the amplitude. In conclusion, by these three important big reasons, Korean traditional village is built by scientific sources. And now we can say that our old generation was very unbelievable genius. By these reasons we have to make sure when we make another city town and farm village planning. The meaning of making sure is that a person who have responsibility for making city have to make plan by scientific sources. It has to be not only theoretical but also think about real human life. It also fit on our traditional.

• 한국정보통신학회논문지
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• 제17권8호
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• pp.1777-1783
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• 2013

시간영역 해석 기법의 하나인 전달선로행렬 모델링을 이용하여 수중물체 이동시 나타나는 도플러 효과를 구현하는 방법에 관한 연구를 수행하였다. 수중물체가 이동하는 상황을 고려하기 위해 입력 신호의 위치를 수중물체의 이동속도에 맞추어 매 시각 마다 신호를 입력한 결과, 최대 2.47%의 아주 작은 오차 범위에서 도플러 효과를 얻을 수 있었다. 또한, 수중물체의 이동 속도를 조절하기 위해 입력 신호의 입력 속도를 조절하는 것에 의해 이론치와 비교하여 최대 0.63% 이내의 오차를 가지는 신뢰할 수 있는 수치 시뮬레이션 결과를 얻을 수 있었다.

• 한국시뮬레이션학회논문지
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• 제24권4호
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• pp.163-170
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• 2015

본 연구는 농식품 산업의 중심축인 가락도매시장의 공급망 관리를 최적화 할 수 있는 변혁의 기회인 '가락시장 현대화 사업'의 유통물류 이슈에 적용하기 위한 유동인력 및 물류 동선에 대한 시뮬레이션 분석법을 적용하고 있다. 이미 업계에서는 익히 알고 있는 바와 같이 농식품 산업과 같은 1차 산업에서는 체계적인 방법에 의한 물류동선계획을 제대로 현장에 적용하지 못하고 있는 실정이고, 유통물류의 SCM분야는 더더욱 정형화되어 있지 못한 것이 또한 현실이다. 이에 유통시설의 5대 흐름관리 요소인 차량동선(물류차량/고객차량), 물류집기동선, 고객동선, 유통시설 종사원 동선, 상품 진열/후퇴 동선과 같은 흐름 동선 들을 도매시장 운영현장에 적용하여 모든 물류흐름에 최적화된 프로세스 계획 설계가 이루어지도록 하는 것이 필요하고, 이는 향후 농식품 산업의 물류 공급망을 효율화하는데 매우 중요한 기초 자원으로 활용할 것이다. 제조 산업과 물류산업에서는 공정기반 물류프로세스가 비교적 잘 지켜지고 있는데 반하여 유통산업, 특히 농식품 산업과 같은 1차 산업 물류현장에서는 행위기반 물류 프로세스가 중심이 되어서 모든 업무분석이 이루어지다 보니, 금번 시뮬레이션 작업은 업계 최초로 시도되는 정량 설계화 작업에 있다는 것에 매우 큰 의의를 둘 수 있겠다. 특히, 주차동선 파악에 있어서는 4개의 평가모형을 감안하여 특성별 물류동선 시뮬레이션을 진행하였고, 이를 바탕으로 물류 동선의 병목지역과 물류이동특성의 문제점을 사전 발견하여 물류현장 운영자와 물류시스템 설계자에 적시 피드백 시켜주는 효과적인 업무진행 방식을 채택하여 농식품 산업 물류현장의 합리적 설계와 최적화된 공급망 관리 시스템의 적용에 가일층 선진화된 대안을 제공했다는데 또한 큰 의미를 둘 수 있겠다.