• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.140-140
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• 2017

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.141-141
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• 2017

• Magazine of the Korea Concrete Institute
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• v.14 no.4
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• pp.40-48
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• 2002

콘크리트는 시멘트의 수화반응으로 시간이 경과하면 굳어지게 되는 물질이다 따라서 레미콘 생산시 기기 및 장비 등에 고착된 콘크리트는 가수 혼합 등으로 분해가 불가능하므로 일단 콘크리트의 제조 및 운반작업이 종료된 후에는 즉시 세척하여야만 한다. 특히 레미콘 생산 현장에서와 같이 대량의 콘크리트를 제조할 경우에 있어, 일단의 콘크리트가 생산완료된 후 레미콘 트럭의 드럼내ㆍ외부 및 배치플랜트의 믹서ㆍ호퍼 등의 세척은 후속콘크리트 제조시 배합비의 정밀을 기하거나, 장비의 보존을 위하여 반드시 필요하게 되는데, 이때 발생하는 세척배수에서 골재를 제거한 것을 회수수라 한다.(중략)

• Journal of Korean Tunnelling and Underground Space Association
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• v.5 no.1
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• pp.55-70
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• 2003

Ammunition magazine, which is installed on the ground, has difficulty in protecting from the external attack, and accidental explosion should cause great damage to the life and property. For these reasons, it is needed to develop underground magazine that it has the advantages of safety, security and maintenance. This paper introduce the design case for blasting facilities, which should resist blasting pressure, as well as layout of underground magazine, which takes a safety for explosion and a working space of loading/unloading machine into consideration. On the layout, in case of ${\bigcirc}{\bigcirc}$ underground magazine, put three storage chambers in position almost parallel with principle stress direction, where less effected on discontinuity and hard rock area. Also, secured safe distance according to safety criteria of the Defense Ministry, and verified suitable layout by trace simulation for loading/unloading machine on working stage. Blasting design was performed on evaluation of maximum blast pressure between donar and acceptor chambers, and design condition for blast door, valve, etc. Diminution facilities against explosion, such as thrust block or debris trap, determined its size after plan in accordance with blasting criteria and calculation by structural analysis.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.98-100
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• 2012

컴퓨팅 성능향상과 장비의 증가는 전력소비의 증가로 이어져 데이터센터 경영자에게 운영경비의 증가로 피할 수 없는 중요한 문제가 되었다. 그래서 미국의 데이터센터에서는 에너지 효율화 지수인 PUE(Power Usage Effectiveness)를 표준지수로 정하고 에너지소비를 관리하고 있다. 데이터센터에서 소비되는 에너지에서 IT부문과 비IT부문의 에너지 소비비율은 50:50 비율이다. IT장비는 처음 도입 시 에너지 효율적인 장비를 도입하면 컴퓨터 운영상에서 에너지를 절감할 기회는 많지가 않지만, 비IT부문은 설비운영적인 측면으로 안정성을 고려하면서 동시에 효율적인 운영환경을 유지하는 것이 가능하다. 본 문서에서는 비IT부문에서 전산실 장비의 열복도-냉복도 분리 배치가 에너지 절감효과가 어느 정도인지 실험을 하였으며, 그 실험결과를 기술하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.463-466
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• 2004

본 연구는 조선 LNG선의 탱크를 제작하는 공장의 관리 및 운영을 지원하는 제조실행 시스템(MES : Manufacturing Execution Sys- tem)의 개발에 대한 내용이다. 본 연구대상 공장에는 가공과 조립라인이 있으며, 가공라인에서는 소재를 가공하고, 조립라인에서는 가공된 소재를 가공하고, 조립라인에서는 가공된 소재를 용접으로 최종 조립한다. 본 연구 대상 공장의 주요 관리 및 운영에 대한 관점은 장비의 고장 방지와 효율극대화, 납기 준수 및 최종 용접 후 결함 최소화 등이다. 이에 본 연구에서는 공장을 체계적으로 관리 운영하기 위해 공정관리와 장비관리 기능을 통합한 제조실행 시스템을 개발하였다. 공정관리는 일정계획 수립, 관리에서부터 작업자 배치 및 입${\cdot}$출고 관리 등의 역할을 수행하고, 장비관리는 장비 모니터링, 장비와 작업 이력 데이터 추출 및 집계, 장비보전 관리, 장비별 작업지시 등의 역할을 수행한다. 본 연구의 개발 시스템은 MSSQL Sever 데이터베이스와 Visual Basic, C++ Builder로 개발되었다.

• Journal of the HCI Society of Korea
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• v.2 no.2
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• pp.45-51
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• 2007

Space planning is one of the popular applications of VR technology including interior design, architecture design, and factory layout. In order to provide easier methods to accommodate physical objects into virtual space planning task, we suggest applying mixed reality (MR) interface. We describe our hardware and software of our MR system designed according to requirements of the application domain. In brief, our system hardware consists of a video see-through display with a touch screen interface, mounted on a mobile platform, and we use screen space 3D manipulations to arrange virtual objects within the MR scene. Investigating the interface with our prototype implementation, we are convinced that our system will help users to design spaces in more easy and effective way.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.5
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• pp.42-49
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• 2007

This paper introduces a study on reliability-driven device placement using simulated annealing algorithm which can be applicable to MCM or electronic systems embedded in a spacecraft running at thermal conduction environment. Reliability of the unit's has been predicted with the devices' junction temperatures calculated from FDM solver and optimized by simulated annealing algorithm. Simulated annealing in this paper adopts swapping devices method as a perturbation. This paper describes and compares the optimization simulation results with respect to two objective functions: minimization of failure rate and minimization of average junction temperature. Annealing temperature variation simulation case and equilibrium coefficient variation simulation case are also presented at the two respective objective functions. This paper proposes a new approach for reliability optimization of MCM and electronic systems considering those simulation results.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.04a
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• pp.443-449
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• 2004

In this paper, we established a simulation model for transport vehicle that carries the container transportation between apron and yard block on automated container terminal with a perpendicular yard layout. Usually, the efficiency of container terminal is evaluated by productivity of container cranes at apron, and though there are enough support of transport vehicles and yard cranes, can improve the productivity of container cranes. Especially, transport vehicle is very important factor in productivity of container cranes and has variable work productivity according to loading and unloading situation of container cranes. Therefore, a method that can estimate work productivity of transport vehicle efficiently is required. We analyzed work productivity of transport vehicle using simulation model that has state transition of transport vehicle. We performed various simulation experiment and analyzed work productivity of transport vehicle and calculated the required number of transport vehicle by container crane additionally.

• Journal of the Korean Society of Propulsion Engineers
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• v.3 no.1
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• pp.55-64
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• 1999

Large size shipyards have peformed the generating of piece and the nesting using shipbuilding-oriented CAD program, which requires higher skilled operators and lots of costs. So, medium and small size shipyards have pursued different types of piece generation and nesting (arrangement method). This research is to develop a program for the generating of pieces with parametric macro method and a STRIP program for the nesting of pieces by PC, which can be applied in such shipyards.