• 한국농공학회지
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• 제45권1호
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• pp.102-114
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• 2003

The objectives of the paper are to evaluate cell based pollutant loadings for different storm events, to monitor the hydrology and water quality of the Baran HP#6 watershed, and to validate AGNPS with the field data. Simplification was made to AGNPS in estimating storm erosivity factors from a triangular rainfall distribution. GIS-AGNPS interface model consists of three subsystems; the input data processor based on a geographic information system. the models. and the post processor Land use patten at the tested watershed was classified from the Landsat TM data using the artificial neural network model that adopts an error back propagation algorithm. AGNPS model parameters were obtained from the GIS databases, and additional parameters calibrated with field data. It was then tested with ungauged conditions. The simulated runoff was reasonably in good agreement as compared with the observed data. And simulated water quality parameters appear to be reasonably comparable to the field data.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2002년도 춘계학술대회 논문집
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• pp.145-148
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• 2002

A three dimensional FEM system for supporting the design procedure of metal forming processes has been developed by integrating the FEA programs md the CAD interface modules. The system is developed to reduce the time, the extorts and the cost for establishing the successful metal forming processes for the given products. To promote practical application by engineers in medium-size enterprises who do not know much about theories of the FEA and others, various databases and intelligent interfacing modules have been developed in PC environment.

• 한국농공학회지
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• 제39권3호
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• pp.52-63
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• 1997

A CELTHYM(CEll-based Long-Term HYdrologic Model), a pre-processor and a post processor that can be integrated with geographic information system ( GIS) were developed to predict the stream flow of the small watershed. The CELTHYM was calibrated and verified with measured runoff data at the WS # 1 and WS # 3 that are testing water sheds of Seoul Nat' 1 Univ., dept. of agricultural engineering, in Ansan city, Kyunggi province, South Korea. The results of tests are in good agreement with measured data and usable for other application, but the component of direct runoff and water balance on paddy fields need more study.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 가을 학술발표대회 논문집(III)
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• pp.649-655
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• 1998

In this study, the personal-computer program was developed to predict prestressing losses containment structures of Nuclear Power Plants by concrete creep and shrinkage. This program is constituted of three parts, which are pre-processor, calculation module and post-processor. Input data for his program are : material properties of concrete, rebar, liner and duct, test results of concrete creep and shrinkage, relative humidity, dimension of containment structures, and the number of prestressing tendon related on containment structures. To obtain better results, this program was made to reflect the prestressing losses due to influence that occurred after prestressing each tendon, thus it can predict prestressing losses and allowable prestressing forces of each tendon. As a case study, this program was applied to containment structures of Youngwang 3 & 4 NPP's and analytical result was compared with test results in In-service Inspection of containment structures. From this comparison, it was proved that this program could well predict prestressing losses by concrete creep and shrinkage.

• 한국시뮬레이션학회논문지
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• 제12권1호
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• pp.73-83
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• 2003

This paper presents armed vehicle BAttle Group Simulation model(called BAGSim) which is an object-oriented simulation system for representing battle group engagement consisting of tanks and helicopters. BAGSim is designed in the evolutionary software life cycle approach with the Unified Software Development Process, and implemented with C++ language. BAGSim consists of a preprocessor for engagement scenario definition and simulation data set up, a main processor for triggering engagement event and advancing simulation clock, and a post processor to record simulation histories. Application scenario covers several type of engagement among command tanks, fight tanks, scout helicopters, attack helicopters, anti-tank guided missiles, and decoys. Thus, BAGSim can be effectively used as an analytic tool to examine some operational concepts and tactics, further experimentally fine tune tank design options.

• 한국자동차공학회논문집
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• 제6권6호
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• pp.7-14
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• 1998

A graphic user interface program for the design of vehicle suspension system is developed in this work. Graphic templates are designed by using a graphic language and a library and given to users for interactive data input. Several suspension types are graphically given, and the information of hard points can be directly provided on the graphic templates by users. The information is saved in a data structure which can be efficiently accessed, and transformed into another data format. The data transformation is for the interface to an analyzer by which suspension design characteristics can be calculated.

• 대한기계학회논문집A
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• 제29권1호
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• pp.96-106
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• 2005

An integrated single-wafer processing tool, composed of multiple single wafer processing modules, transfer robots, and load locks, has complex routing sequences, and often has critical post-processing residency constraints. Scheduling of these tools is an intricate problem, and testing schedulers with actual tools requires too much time and cost. The Single Wafer Processor (SWP) simulator presented in this paper is to validate an on-line scheduler, and evaluate performance of integrated single-wafer processing tools before the scheduler is actually deployed into real systems. The data transfer between the scheduler and the simulator is carried out with TCP/IP communication using messages and files. The developed simulator consists of six modules, i.e., GUI (Graphic User Interface), emulators, execution system, module managers, analyzer, and 3D animator. The overall framework is built using Microsoft Visual C++, and the animator is embodied using OpenGL API (Application Programming Interface).

• 한국산학기술학회논문지
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• 제19권9호
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• pp.333-340
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• 2018

최근 비정형 건축구조물은 건설 산업의 디지털화로 인해 점점 더 복잡한 형상으로 디자인되고 있다. 특히, 외관 및 내부 구성요소들의 단면이 자유롭게 변화되는 곡선 및 곡면의 형태를 띠고 있으며, 그로 인해 곡률을 가진 구조부재들이 빈번히 나타나고 있다. 이러한 구조물의 모형을 작성하고 안정성을 평가를 하는데 있어, 고전적 방식의 유한요소 해석기법이 적용된 상용프로그램들은 신속한 형상 모델링이 불가능하여 생산성 저하를 초래하고 있다. 따라서 본 연구에서는 선행연구를 통해 개발된 구조해석 통합시스템을 확장하여 비정형 외피 형상을 신속하게 모델링하고, 그 결과물을 이용하여 외피를 구성하는 프레임 구조를 자동으로 생성할 수 있는 전후처리 모듈을 개발하였다. 본 연구에서 개발된 전후처리 모듈은 스플라인 곡선 및 곡면의 세분화 알고리즘을 적용하여 NURBS곡면의 형상정보를 통해 해석요소를 자동으로 생성하고, 해석 후의 변형 형상을 보다 현실적으로 가시화 시킬 수 있도록 개발되었다. 본 연구를 통해 개발된 전후처리 모듈은 복잡한 곡면 형상을 신속하게 구축하고, 그에 따른 하부 골조시스템의 해석모형을 자동으로 생성할 수 있어 향후 비정형 건축물 설계의 생산성 향상에 기여할 수 있을 것으로 판단된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.363-368
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• 2001

Abutments in Kumdang bridge are massive concrete structures of which total height is l0m, length is 30m, and width is 7m. Therefore, there is every probability that early age thermal cracking such as hydration heat occur. We measure heat of hydration, strains of rebar, and stresses of concrete abutment during construction. Using analysis of measuring data, we examine thermal stresses, and make use of results as method which control thermal cracking. Finally, we develope thermal stress analysis program which have pre/post processor to be easy of accessing and the usefulness of that is estimated through comparison of results.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 춘계학술대회 논문집
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• pp.241-242
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• 2010