• Proceedings of the Korea Society for Simulation Conference
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• 2004.05a
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• pp.136-140
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• 2004

A power-plant simulation tool has been developed for training the plant operators and testing a plant control system. The simulation tool is composed of a graphic editor, a component model builder and a system simulation solver. Such new programing techniques as object-oriented modeling and GUI(Graphical User Interface) are employed in developing the simulation tool. The graphic editor is based on the OpenGL library for effective implementation of GUI while the component model builder is based on object-oriented programming for efficient generalization of component models. The developed tool has been verified through the simulation of a real power plant.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.328-330
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• 2005

본 논문에서는 현재 게임 및 각종 동역학 관련 시뮬레이션에서 요구되는 물리 효과를 효과적으로 이용하기 위한 컴포넌트와 그 구조를 제시한다. 특히 가장 다양한 분야에 적용되는 차량 시뮬레이션에 특화된 구조를 제시하고 있으며 사용되는 각종 컴포넌트의 구조를 세부적으로 설명하였다. 또, 위의 컴포넌트를 기반으로 구현한 제작 툴을 이용하여 효과적인 개발에 필요한 여러 가지 요소를 만족시키고 있다.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2800-2802
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• 2002

본 연구는 철도신호 장치간 인터페이스를 위한 데이터 링크제어의 성능분석을 위하여 Matlab/simulink을 이용한 시뮬레이션과 시뮬레이터 개발을 목표로 하였다. 이를 위해 Simulink 윈도우상의 데이터 링크제어 시스템 화면에서 사용자 인터페이스 블록을 통해 통신 파라미터들을 선택하여 시뮬레이션을 행할 수 있는 시뮬레이션 툴과, Matlab이 제공하는 RS232통신용 API 기능을 이용하여 철도 신호장치간의 통신 프로토콜을 PC상에서 모사할 수 있는 프로토타입 시뮬레이터를 개발하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.439-442
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• 2021

가상현실은 제4차 산업혁명 시대 신산업으로 꼽히는 기술 중 하나이다. 본 연구에서는 가상현실 공간설계의 교육적 가능성을 확인하고 교육적 활용을 위한 툴로서 3D 컴퓨터 그래픽 제작 소프트웨어인 블렌더와 3D 객체를 웹에서 쉽게 렌더링해주는 자바스크립트 라이브러리 three.js를 이용한 건축 내외장재 시뮬레이션 프로그램의 프로토타입을 개발 및 제안하였다. 본 연구에서 제안한 방식으로 학습자들은 자유도 높은 가상공간 공간설계가 가능하여 조형놀이의 형태로 학습을 즐길 수 있을 것으로 기대된다. 후속 연구로는 본 연구에서 구현한 프로토타입과 같은 방식으로 가상현실 공간설계 시뮬레이션을 할 수 있는 교육 프로그램 개발 및 효과성 검토를 실시할 것을 제안하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.5 no.1
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• pp.157-165
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• 2001

We analyzed the electrical characteristics of platinum silicide schottky junction to develope the voltage swing in Integrated Schottky Logic gates, and simulated the characteristics with the programs in this junctions. Simulation programs for analytic characteristics are the Medichi tool for device structure, Matlab for modeling and SUPREM V for fabrication process. The silicide junctions consist of PtSi and variable silicon substrate concentrations in ISL gates. Input parameters for simulation characteristics were the same conditions as process steps of the device farications process. The analitic electrical characteristics were the turn-on voltage, saturation current, ideality factor in forward bias, and has shown the results of breakdown voltage between actual characteristics and simulation characteristics in reverse bias. As a result, the forward turn-on voltage, reverse breakdown voltage, barrier height were decreased but saturation current and ideality factor were increased by substrates increased concentration variations.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.1
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• pp.173-179
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• 2012

In this study, cavity filter performing BPF function in Korea T-DMB system was designed by using of HFSS simulation tool, and we compared measured results with the simulated data. By simulation of HFSS that is magnetic and electric 3D simulating tool, we can save time and money maximumly by checking performances before actual filter implementation. Optimum conditions for the cavity filter were delivered based on the cylindrical waveguide characteristics. Measured results by implementation were compared with the simulation data.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.38-39
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• 2009

Visual simulation technology is one of important constituents experienced directly by simulator users. Simulator users have a needs for more fast, realistic and intuitive visualization. Though hardwares such as computing power and visual equipment have been grown, the limits have been indicated in graphic rendering engine generally used in marine simulator up to now. This paper has focused on the review of applicability about graphic rendering engines for visual simulation. We had derived system requirements in visualization of tug-barge simulation, had surveyed graphic rendering engines as commercial and open source, and analyzed strengths and weakness of them.

• The KIPS Transactions:PartC
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• v.18C no.4
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• pp.265-278
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• 2011

The objective of this paper is to analyze and characterize end-to-end packet statistics after modeling and simulation of WiFi (IEEE 802.11g) and WiMAX (IEEE 802.16e) of a virtual wireless network using OPNET Modeler Wireless Suite. Wireless internal and external network simulators such as Remcom's Wireless InSite Real Time (RT) module, WinProp: W-LAN/Fixed WiMAX/Mobile WiMAX, and SMI system, are designed to consider data transfer rate based on wireless propagation signal strength. However, we approached our research in a different perspective without support for characteristic of these wireless network simulators. That is, we will discuss the purpose of a visual analysis for these packets, how to receive each point packets (e.g., wireless user, base station or access point, and http server) through end-to-end virtual network modeling based on integrated wired and wireless network without wireless propagation signal strength. Measuring packet statistics is important in QoS metric analysis among wireless network performance metrics. Clear packet statistics is an especially essential metric in guaranteeing QoS for WiMAX users. We have found some interesting results through modeling and simulation for virtual wireless network using OPNET Modeler Wireless Suite. We are also able to analyze multi-view efficiency through experiment/observation result.

• Journal of Korean Tunnelling and Underground Space Association
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• v.11 no.4
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• pp.373-385
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• 2009

A new indexing methodology so called KTH-index was developed to quantitatively evaluate a potential level for tunnel collapse hazard, which has been successfully applied to tunnel construction sites to date. In this study, an attempt is made to apply this methodology for validating an outcome of tunnel design by checking the variation of KTH-index along longitudinal tunnel section. In this KTH-index simulation, it is the most important to determine the input factors reasonably. The design factor and construction condition are set up based on the designed outcome. Uncertain ground conditions are arranged based on borehole test and electro-resistivity survey data. Two scenarios for ground conditions, best and worst scenarios, are set up. From this simulation, it is shown that this methodology could be successfully applied for providing quantitative validity of a tunnel design and also potential hazard factors which should be carefully monitored in construction stage. The hazard factors would affect sensitively the hazard level of the tunnel site under consideration.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.724-727
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• 1997

In this paper, we developed a Windows 95 version Off-Line Programming System which can simulate a Robot model in 3D Graphic space. 4 axes SCARA Robot (especially FARA SM5)was adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the OLP system in the Windows 95's GUI environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by Silicon Graphics, Inc. were utilized for 3D Graphics.