• Title, Summary, Keyword: simulation

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Block Erection Simulation Using the Integrated System of Combined Discrete Event and Discrete Time Simulation Kernel (이산 사건 및 이산 시간 혼합형 시뮬레이션 커널의 통합 시스템을 이용한 블록 탑재 시뮬레이션)

  • Cha, Ju-Hwan;Roh, Myung-Il;Cho, Doo-Yeoun;Lee, Kyu-Yeul
    • Journal of the Society of Naval Architects of Korea
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    • v.46 no.3
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    • pp.303-312
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    • 2009
  • Recently, requests for the accurate process planning using modeling and simulation technique are increasing in many engineering fields including shipbuilding industry. In this study, Combined DEVS(Discrete EVent System specification) and DTSS(Discrete Time System Specification) simulation kernel is developed, and an integration strategy of dynamics simulation module and graphics module is also implemented. To evaluate the efficiency and applicability of the simulation kernel and integration strategy, these are applied to the block erection simulation of offshore structures.

E-Business and Simulation

  • Park, Sung-Joo
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.9-10
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    • 2001
  • Simulation has been evolved with the advance of computer and technique of modeling application systems. Early simulations were numerical analysis of engineering models known as continuous simulation, analysis of random events using various random number generators thus named as Monte Carlo simulation, iud analysis o(\\\\`queues which are prevalent in many real world systems including manufacturing, transportation, telecommunication. Discrete-event simulation has been used far modeling and analyzing the systems with waiting lines and inefficient delays. These simulations, either discrete-event, continuous, or hybrid, have played a key role in industrial age by helping to design and implement the efficient real world systems. In the information age which has been brought up by the advent of Internet, e-business has emerged. E-business, any business using Internet, can be characterized by the network of extended enterprises---extended supply and demand chains. The extension of value chains spans far reaching scope in business functions and space globally. It also extends to the individual customer, customer preferences and behaviors, to find the best service and product fit for each individual---mass customization. Simulation should also play a key role in analyzing and evaluating the various phenomena of e-business where the phenomena can be characterized by dynamics, uncertainty, and complexity. In this tutorial, applications of simulation to e-business phenomena will be explained and illustrated. Examples are the dynamics of new economy, analysis of e-business processes, virtual manufacturing system, digital divide phenomena, etc. Partly influenced by e-business, a new trend of simulation has emerged called agent-based simulation, Agent-based simulation is a technique of simulation using software agent that have autonomy and proactivity which are useful in analyzing and integrating numerous individual customer's behavior. One particular form of agent-based simulation is swarm. This tutorial concludes with the illustration of swarm or swarm Intelligence applied to various e-business applications, and future directions and implications of this new trend of simulation.

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Development and Applicability Evaluation of an Emergent Care Management Simulation Practicum for Nursing Students (간호학생을 위한 응급상황관리 시뮬레이션 실습 교과목 개발 및 적합성 평가)

  • Hur, Hea Kung;Park, SoMi;Shin, Yoon Hee;Lim, Young Mi;Kim, GiYon;Kim, Ki Kyong;Choi, Hyang Ok;Choi, Ji Hea
    • The Journal of Korean Academic Society of Nursing Education
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    • v.19 no.2
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    • pp.228-240
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    • 2013
  • Purpose: This study was to evaluate the applicability of an emergent care management simulation practicum which is for enhancing nursing students' emergent care management competency based on the Nursing Education Simulation Model. Methods: One group pre-post experimental design was conducted for evaluation of the applicability of the simulation practicum. A convenient sample of 60 senior nursing students was participated. The simulation practicum was provided for 26 hours per student at the end of the first semester of senior year. Educational practices in simulation scale, simulation design scale and learning outcomes were measured. Higher positive correlations between variables represent applicability. Descriptive analysis, paired t-test and Pearson correlation coefficient were used for data analyses. Results: Among contractual components of nursing education simulation model, educational practices in simulation and simulation design (r=.80, p<.010), learning outcomes (r=.71-.28, p<.050), simulation design and learning outcomes (r=.72-.30, p<.050) were significantly correlated. Critical thinking (t=-3.63, p<.050) and problem solving competence (t=-2.55, p<.050) were significantly increased by this simulation practicum. It represents the applicability of an emergent care management simulation practicum. Conclusion: This emergent care management simulation practicum was appropriate to enhance the nursing students' emergent care management coping competency.

Development of a Dynamic Simulation Program for Pantograph-Catenary System based on a Mode Superposition Method (모드중첩법을 기초로 한 집전성능해석 프로그램 개발)

  • 조용현;이기원;현승호;정흥채
    • Proceedings of the KSR Conference
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    • pp.606-617
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    • 2000
  • A dynamic simulation program for pantograph-catenary system is developed based on a mode superposition method to predict current collection performance. Formulations for the dynamic simulation are presented in this paper. The number of modes which should be considered for a KTX catenary system is reviewed through frequency response analyses. The responses for GPU pantograph - KTX catenary system are simulated with various train speeds. The our simulation results are in reasonably good agreements with RTRI simulation program, SNCF simulation program, and BR simulation program.

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REGENERATIVE BOOTSTRAP FOR SIMULATION OUTPUT ANALYSIS

  • Kim, Yun-Bae
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.169-169
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    • 2001
  • With the aid of fast computing power, resampling techniques are being introduced for simulation output analysis (SOA). Autocorrelation among the output from discrete-event simulation prohibit the direct application of resampling schemes (Threshold bootstrap, Binary bootstrap, Stationary bootstrap, etc) extend its usage to time-series data such as simulation output. We present a new method for inference from a regenerative process, regenerative bootstrap, that equals or exceeds the performance of classical regenerative method and approximation regeneration techniques. Regenerative bootstrap saves computation time and overcomes the problem of scarce regeneration cycles. Computational results are provided using M/M/1 model.

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A Study on the Operational Strategies of the Automated Container Terminals Using Simulation Techniques (시뮬레이션기법을 이용한 자동화 컨테이너터미널의 운용전략에 관한 연구)

  • 장성용;용운중
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.36-42
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    • 2001
  • This paper presents the operational planning systems of automated container terminals. The proposed system is composed of berth allocation module, yard planning module, resource allocation module, sequencing module, and simulation module. All the sub-modules except resource allocation module are built into integrated simulation model using simulation package AutoMod. Simulation experiments are performed according to the number of AGVs and AGV allocation policies.

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A GUI Implementation of a Power Plant Dynamic Simulation System on Windows NT/2000 (원도즈 NT/2000에서의 발전플랜트 동특성 해석시스템 그래픽 사용자 인터페이스 구현)

  • 이동수;이기현;조창호
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.197-201
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    • 2002
  • APESS(Advanved Plant Engineering & Simulation System) is a dynamic simulation software for power plant which is being developed by Doosan Heavy Industries & Construction Co., Ltd. This Paper represents the GUI implementation of APESS on Windows NT/2000 operating system.

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A Simulation Support System for Optimal Design of FMS (FMS 최적설계를 위한 시뮬레이션 지원 시스템)

  • Lee, Yeong-Hae;Kim, Seong-Sik
    • IE interfaces
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    • v.1 no.2
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    • pp.25-34
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    • 1988
  • Simulation is known to be a valuable tool for design and operation of Flexible Manufacturing Systems(FMSs) under study. However, in order for simulation to be useful, lots of knowledges about the behavior of system to be designed, statistics for output analysis, modeling techniques and a specific simulation language are required by the simulationist. In this paper a way to build simulation support system for nonexperts at simulation will be described and a simulation support system for FMS design and operation developed by the authors will be demonstrated.

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Parallel Simulation of Bounded Petri Nets using Data Packing Scheme (데이터 중첩을 통한 페트리네트의 병렬 시뮬레이션)

  • 김영찬;김탁곤
    • Journal of the Korea Society for Simulation
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    • v.11 no.2
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    • pp.67-75
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    • 2002
  • This paper proposes a parallel simulation algorithm for bounded Petri nets in a single processor, which exploits the SIMD(Single Instruction Multiple Data)-type parallelism. The proposed algorithm is based on a data packing scheme which packs multiple bytes data in a single register, thereby being manipulated simultaneously. The parallelism can reduce simulation time of bounded Petri nets in a single processor environment. The effectiveness of the algorithm is demonstrated by presenting speed-up of simulation time for two bounded Petri nets.

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A Simulation Modeling and Analysis of Capital Investment using AIM (AIM을 이용한 염색/가공 설비 투자 분석 시뮬레이션)

  • 최성훈
    • Journal of the Korea Society for Simulation
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    • v.4 no.1
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    • pp.87-97
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    • 1995
  • Simulation techniques are used to improve the productivity of a textile factory. A simulation model is developed for the analysis of investment for dyeing process equipment, such as dryers and bleachers. For modeling and analysis, AIM (Analyzer for Improving Manufacturing) is used. AIM is a manufacturing oriented simulation software developed by Pritsker Corp. AIM provides interactive model building and simulation, automatic animation, and powerful graphic outputs. thereby, drastically reducing modeling efforts and also enhancing communication capabilities.

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