• Proceedings of the Korea Air Pollution Research Association Conference
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• 1996.04a
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• pp.135-137
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• 1996

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1994.10a
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• pp.153-154
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• 1994

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.58-60
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• 2013

부산항 입항 및 출항 대기, 통과 선박의 중간 기항지로 이용되는 부산 남외항 대기 정박지는 N-1~N-5으로 구성되며 현재, 최대 90척이 동시에 정박 가능한 집단 정박지 지정방식으로 지정되어 있다. 부산 남외항 대기 정박지는 입 출항 선박 및 통과 선박, 급유선 등의 교통에 따른 충돌, 접촉 등의 해양 사고와 갑작스러운 돌풍 등 기상악화에 따른 충돌, 접촉 및 좌초 등의 해양 사고가 발생하고 있다. 부산 남외항 대기 정박지의 자연 환경, 이용현황, 기상, 입 출항 선박 및 통과 선박의 교통 흐름을 종합적으로 살펴보고 부산 남외항 대기 정박지에서 발생하는 해양사고를 분석하였다. 따라서 부산 남외항 대기 정박지의 운영상의 문제점을 찾고, 해상교통조사 설문조사 이론적 근거를 기초로 안전도 평가 시스템을 사용하여, 향후 개선방향을 제시하였다.

• Proceedings of the Korean Vacuum Society Conference
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• 2014.02a
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• pp.240.1-240.1
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• 2014

대기압 플라즈마 제트 장치에 주입되는 기체의 유량 변화에 따른 방전 특성을 유체역학적으로 해석하였다. 장치에 주입되는 기체의 유량 변화는 레이놀즈수에 의한 유체 흐름의 상태 변화와 베르누이 정리에 의한 압력 변화를 동반한다. 유리관에 주입되는 기체의 레이놀즈수가 Re<2000이면 층류이며 Re>4000이면 난류, 2000

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1998.04a
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• pp.55-57
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• 1998

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.8
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• pp.1434-1440
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• 2008

Performance of TCP/IP is studied on the wireless network using flow control and congestion control mechanism based on transmission rate. We discuss the elimination or the reduction of various phenomena of burst by flow controlling on transmission rate and verify that there are TCP ACK compression promblems on the queue by burst reaction while executing transmission rate controlled channels. Analyzing periodic burst reaction on the queue of source IP, the maximum value of queue is expected, which represents the applible expectation of throughput reduce and shows the improvement of performance by the reduce of throughput due to hi-directional traffic.

• Korean Chemical Engineering Research
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• v.58 no.2
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• pp.307-312
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• 2020

Fluidized bed reactors operated in subatmospheric pressure has been focused because several industrial applications such as vacuum drying and plasma cvd requires reduced pressure fludization. However, the hydrodynamics of fluidized beds in subatmospheric pressure has not been extensively investigated. The pressure drop in the fluidized bed has been measured with variation of downstream pressures from 1.33 to 101.3 kPa in the shallow and deep fluidized beds under the sub-atmospheric pressures. The obtained minimum fluidization velocity of powders is a function of pressure due to the changes of gas density and mean free path. We can experimentally determine the critical Knudsen number and the critical pressure to define the slip regime significantly to influence the hydrodynamics of fluidized beds.

• Journal of the Korea Society for Simulation
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• v.25 no.2
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• pp.75-81
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• 2016

By using simulation, fixed location production method and flow production method have been compared to improve the productivity of deckhouse preceding outfitting process. In this paper, we analyze that the suggested flow production system instead of fixed location production can improve productivity. In current preceding outfit production system which adopts fixed location production, where a block occupies an area and does not move until the work finishes. On the other hand, in improved flow production system, the block moves instead of workers and equipment. Though the output of two systems are almost the same when we did not consider the moving time and waiting time of blocks, the flow production will be better when the variability of task time will be reduced.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2004.11a
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• pp.191-192
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• 2004

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2005.11a
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• pp.520-522
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• 2005