• Journal of the Korean Society of Propulsion Engineers
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• v.23 no.4
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• pp.50-60
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• 2019

This paper introduces the development of a toolbox for the Space Shuttle Main Engine(SSME) based on MATLAB/Simulink. A mathematical model of rocket engine creation and validation can be a complex process, the development of a rocket engine toolbox simplifies this process, thereby facilitating engine performance optimization as well as new design development. The mathematical modeling of the SSME dealt with in this paper is formed by 32 first-order differential equations derived from seven governing equations. We develop the toolbox for the SSME classifying each module according to the engine components. Further, we confirm the validity of the toolbox by comparing the results of the simulation obtained using the toolbox with those obtained using the original simulation of the engine.

• Journal of the Society of Disaster Information
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• v.11 no.3
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• pp.436-445
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• 2015

A flood loss estimation toolbox was developed within GIS software. This toolbox is for anyone who is interested in the flood loss estimation, and uses data accessible to public. In particular, the loss estimation framework in the toolbox is distinct in that the inventory items are individually dealt with. The toolbox was applied to estimate the economic loss from a levee failure event in 2002. The estimated loss was a little larger than the reported value. The difference is probably due to the asset values and the damage functions for each inventory item, which have to be updated.

• Digital Contents
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• no.7 s.122
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• pp.34-37
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• 2003

최근 IT 업계 화두는 '기업간 인수합병'이다. 특히 커뮤니티 사이트로 부동의 1위를 차지하고 있는 싸이월드가 네이트닷컴에 새 둥지를 틀었고, 지인 커뮤니케이션 툴로 인기몰이를 하던 '쿠쿠박스'는 분당의 작은 사무실을 접고, 테헤란밸리의 중심 스타타워 NHN의 품에 들어갔다. 주식교환 방식으로 이루어진 이들 M&A의 비용을 환산해보면 NHN은 12억에 쿠쿠박스를, 네이트닷컴은 100억원대에 싸이월드를 인수한 것으로 알려지고 있다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.25-26
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• 2010

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.97-100
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• 2010

3차원 정보모델에 기반한 설계 자동화 프로그램의 개발은 좀 더 완성도가 높은 설계안을 도출할 수 있는 방안을 제시할 수 있다. 콘크리트 교량의 설계 과정에서 정형화된 구조 검토 단계 부분을 자동화하고 설계자로 하여금 좀 더 창의적인 설계가 가능하도록 지원하는 시스템을 개발하였다. 특히, 3차원 Building Information Modeling 기반의 프리스트레스트 콘크리트 박스 거더교에 대한 설계 자동화 시스템을 개발하였다. 이를 위하여 3차원 렌더링 알고리즘을 사용하여, 사용자가 원하는 단면 위치 및 분류 체계에 따라 설계를 자동으로 수행할 수 있도록 적용하였다. 또한 생성된 도면은 데이터 호환이 가능함으로써, 사용자의 편의성이 향상될 것으로 판단된다. 이는 설계자동화 분야에서 강교에 국한되었던 점을 콘크리트교를 포함한 주요 교량으로 확대하고 설계 성과품으로 3차원 모델을 도출할 뿐 아니라 2차원 도면을 연계하도록 구성하여 토목 엔지니어의 기술력을 향상시킬 것으로 기대된다.

• Journal of the Institute of Convergence Signal Processing
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• v.4 no.4
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• pp.81-86
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• 2003

Current growth of VLSI design depends critically on the research and development of automatic layout tool. Automatic layout is composed of placement assigning a specific shape to a block and arranging the block on the layout surface and routing finding the interconnection of all the nets. Algorithms performing placement and routing impact on performance and area of VLSI design. Switchbox routing is a problem interconnecting each terminals on all four sides of the region, unlike channel routing. In this paper we propose a genetic algorithm searching solution space for switchbox routing problem. We compare the performance of proposed genetic algorithm(GA) for switchbox routing with that of other switchbox routing algorithm by analyzing the results of each implementation. Consequently experimental results show that out proposed algorithm reduce routing length and number of the via over the other switchbox routing algorithms.

• Journal of the Korean Institute of Intelligent Systems
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• v.27 no.1
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• pp.35-41
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• 2017

This paper presents the development of a monitoring and control system for a vehicle cluster using a model-based design technique. For MBD(model-based design), MATLAB GUI(Graphic User Interface), M programs, simulink, state flow, and tool boxes are used to monitor a number of data such as warning, interrupts, and etc. connected to a real vehicle cluster. As a monitoring tool, a PC(Personal Computer) station interworks with the real vehicle cluster through the interface commands of tool boxes. Thus, unlike existing text-based designs, the MBD based vehicle cluster system provides very easy algorithm updates and addition, since it offers a number of blocks and state flow programs for each functional actions. Furthermore, the proposed MBD technique reduces the required time and cost for the development and modification of a vehicle cluster, because of verification and validation of the cluster algorithm on the monitor through a PC.

• Journal of Platform Technology
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• v.6 no.4
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• pp.87-95
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• 2018

With the decrease of sequencing price, many national projects that analyzes 0.1 to 1 million people are now in progress. However, large portion of budget of these large projects is dedicated for construction of the cluster system or purchase servers, due to the lack of programs or systems that can handle large amounts of data simultaneously. In this study, we developed NGSOne, a client program that is easy-to-use for even biologists, and performs SNP analysis using hundreds or more of Whole Genome and Whole Exome analysis without construction of their own server or cluster environment. DRAGEN, BWA / GATK, and Isaac / Strelka2, which are representative SNP analysis tools, were selected and DRAGEN showed the best performance in terms of execution time and number of errors. Also, NGSOne can be extended for various analysis tools as well as SNP analysis tools.

• Journal of Digital Convergence
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• v.10 no.9
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• pp.333-338
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• 2012

This paper is related to a skinny smudge blending method using the arbitrary-shaped master adhered closely to the contour shape. The smudge tool is the popular graphic tool embedded in Adobe Photoshop CS6. The smudge tool is used to smear paint on your canvas. The effect is much like finger painting. We can use the smudge tool by selecting its icon on the toolbox of Adobe Photoshop CS6 and dragging in the direction you want to smudge while holding the mouse button down on the image. As the smudge tool blends all the pixels within a radius of the master to generate the result image, its disadvantages are to smudge even the pixels in the undesired region. In this paper to reduce the disadvantage, the skinny smudge blending method using arbitrary-shaped master is proposed. The proposed blending method has the advantage of applying the smudge effect to the desired regions regardless of the background as the arbitrary-shaped master adhered closely to the contour shape is extracted by color image segmentation.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.08a
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• pp.83.1-83.1
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• 2013

반도체 미세화, Glass 대면적화에 따른 산포관리 및 불량방지 필요(공정이격관리), 설비 데이터만으로는 Sensitivity가 낮아 공정 관리 어려움에 따른 대안 필요, 향후 추가 센서에 대한 접목이 용이한 SW Frame 필요, 양산적용을 위한 설비 및 FAB Host의 자동화 연계 개발 필요, 이종데이터의 통합를 통한 최적의 진단 및 관리가 필요합니다(SCM:툴박스). 즉, 기존의 장비 Parameter가 아닌 실제 공정시 Chamber로부터 얻을 수 있는 물리, 전기, 화학적인 데이터를 적합한 이종(異種) 센서를 직접 부착하여 이들 데이터를 통합 관리 분석 및 실시간 Monitoring을 통한 공정 진단 및 실시간 진단을 실행하는 솔루션입니다. 실 공정 시 적용이 유리한 OES 데이터를 주요 인자로 이외의 기타 데이터를 추가로 통합하여 특화된 분석환경과 공정 모니터링을 통하여 TAT (Turn Around Time)를 줄이고, MTBC (Mean Time Between Clean)를 늘림으로써 궁극적으로 칩메이커의 제품의 가격 경쟁력을 확보 할 수 있는 기능이며, 설비사 입장에서는 자사설비의 지능형 시스템을 위한 제반 기술이기도 합니다.