• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2001년도 춘계 학술대회 논문집
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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.

• 한국CDE학회논문집
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• 제14권2호
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• pp.69-76
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• 2009

The development of a simulation system requires many sub modules such as a dynamic module, a visualization module, etc. If a different freeware is used for each sub modules, it is hard to develop the simulation system by incorporating them because they use their own data structures. To solve this problem, a high-level data structure, called Dynamics Scene Graph Data structure (DSGD) is proposed, by wrapping data structures of two freeware; an Open Dynamics Engine (ODE) for the dynamic module and an Open Scene Graph (OSG) for the visualization module. Finally, to evaluate the applicability of the proposed data structure, it is applied to the block erection simulation in shipbuilding. The result shows that it can be used for developing the simulation system.

• 조명전기설비학회논문지
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• 제23권2호
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• pp.131-137
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• 2009

본 논문은 일사량과 온도의 조건에 따른 태양전지 셀의 등가회로 모델을 모델링하였고, 이를 바탕으로 제작사의 태양광 모듈을 시뮬레이션하여 비교 검토하였다. 검토결과 태양광 모듈의 사양서와 시뮬레이션 값의 오차율이 낮아 신뢰성을 확보할 수 있었으며, 또한 최적인 태양광 모듈 어레이를 시뮬레이션하여 최적인 태양전지 모듈 어레이의 규모를 선택하여 독립형 태양광 시스템을 구현하였다. 또, 특정지역에 설치시 최적인 출력전력도 시물레이션을 통하여 알 수 있었다.

• 소성∙가공
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• 제12권6호
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• pp.550-557
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• 2003

In this study, a web-based system was developed by utilizing finite element method and virtual system designed using Virtual Reality Modeling Language (VRML). The simulation program for axi-symetric sheet forming is developed using finite flement method. The developed system consists of two modules, client module and server module. The client module was developed by using Active-X control. The input data for FEM calculation is transferred to the server module by using communication protocol. Then sever module performs several successive processes: input data generation, forming simulation, conversion of results to VRML format. After that, the results from the simulation can be visualized on the web browser in client computer. Besides, client module offers the capability to control and navigate on virtual forming machine and calculated result. By using this system simulation result can be investigated more realistically in virtual environment including forming machine.

• 한국산업융합학회 논문집
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• 제23권3호
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• pp.427-431
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• 2020

In this Study, as the structure of IT module for smart phone display becomes thin to catch up with slim product trend, the reliability of display module is on the rise as a issue for product design. Especially, almost part of cellular phone should undergo thermal dissipation test. thus many manufacturers have considered design guide line using CAE and simulation for more effective usage of limited resources on the market. This test simulates the case when cellular phone slips through user's fingers while he is talking on the phone. This paper studies a thermal simulation of display module in smart phone. This design for reliability improvements are suggested on the basis of the results of FVM Analysis and display of IT module and smart phone design.

• 한국정보전자통신기술학회논문지
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• 제12권5호
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• pp.499-506
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• 2019

본 논문은 SiC Hybrid module를 적용한 7kW 인버터의 동작 안정성에 관한 것으로 손실 방정식과 시뮬레이션 결과를 비교하여 시뮬레이션 결과의 유효성을 검증하였으며, 시뮬레이션을 통해 Si module과 SiC Hybrid module의 스위치 손실과 다이오드 손실을 비교하였다. 손실 방정식 계산을 통하여 SiC Hybrid module의 도통 손실은 168W, 스위칭 손실은 9.3W, 다이오드 손실은 10.5nW의 결과를 나타내었으며, 시뮬레이션 결과와 비교하였을 때 유사한 값을 나타내었다. 이를 바탕으로 Si module과 SiC Hybrid module의 시뮬레이션 결과 값 비교 결과, Si module의 총 소자 손실값은 246.2W, SiC Hybrid module의 총 소자 손실 값은 189.9W를 나타내었으며, 손실 차이 값은 56.3W로써 약 0.8W의 효율 차이를 보였다. 이로 인하여 SiC SBD의 Reverse recovery 특성을 검증하였다. 또한 고온 포화상태에서 SiC Hybrid module 및 Si module의 안정성을 확인하기 위하여 온도 포화 테스트를 진행하였으며, Si module의 경우, 출력전력 4kW에서 동작을 멈추었고, SiC Hybrid module은 7kW까지 동작을 확인하였다. 이를 바탕으로, 효율 그래프와 온도 그래프를 제시하였으며, Si module은 4kW까지, SiC Hybrid module은 7kW까지 그래프로 나타내었다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1998년도 추계학술대회논문집:21세기에 대비한 지능형 통합항만관리
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• pp.125-135
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• 1998

This paper aims to propose a design for simulation systems for container terminal operation evaluation. The systems cover both terminal design simulation for medium and long tern decision making and terminal operations simulation for day to day decision making. And both systems include the container terminal operation components, quay, yard and gate operations. For the flexible and efficient application of the systems, we designed the systems with three modules such as "Define Module"."Simulation Module" and "Animation Module". "Animation Module".ule&".ot;.

• 대한간호학회지
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• 제53권1호
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• pp.87-100
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• 2023

Purpose: This study aimed to develop a nursing simulation learning module for coronavirus disease 2019 (COVID-19) patient-care and examine its effects on clinical reasoning competence, clinical competence, performance confidence, and anxiety in COVID-19 patient care for nursing students. Methods: A non-equivalent control group pre- and post-test design was employed. The study participants included 47 nursing students (23 in the experimental group and 24 in the control group) from G City. A simulation learning module for COVID-19 patient-care was developed based on the Jeffries simulation model. The module consisted of a briefing, simulation practice, and debriefing. The effects of the simulation module were measured using clinical reasoning competence, clinical competence, performance confidence, and anxiety in COVID-19 patient-care. Data were analyzed using χ²-test, Fisher's exact test, t-test, Wilcoxon signed-rank test, and Mann-Whitney U test. Results: The levels of clinical reasoning competence, clinical competence, and performance confidence of the experimental group were significantly higher than that of the control group, and the level of anxiety was significantly low after simulation learning. Conclusion: The nursing simulation learning module for COVID-19 patient-care is more effective than the traditional method in terms of improving students' clinical reasoning competence, clinical competence, and performance confidence, and reducing their anxiety. The module is expected to be useful for educational and clinical environments as an effective teaching and learning strategy to empower nursing competency and contribute to nursing education and clinical changes.

• 한국통신학회논문지
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• 제21권10호
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• pp.2605-2619
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• 1996

In this paper, we evaluated performance of mobile exchange control part. Queueing network model is used for modeling of mobile exchange control part. We developed a call control processing and location registration scenartio which has a message exchange function between processors in mobile exchange control part. A network symbol are used the simulation models that are composed of the initialization module, message generation module, message routing module, message processing module, message generation module, HIPC network processing module, output analysis module. as a result of computer simulation, we obtain the processor utilization, the mean queue length, the mean waiting time of control part based on call processing and location registration capacity. The call processing and location registration capacity is referred by thenumber of call attempts in the mobile exchange and must be satisfied with the quality of service(delay time).

• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 춘계학술대회 논문집
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• pp.358-364
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• 1999

A wheel/rail contact module for dynamics analysis of railway vehicles is developed. The developed module is based on non-linear contact and FASTSIM algorithm which calculates contact forces. And the module is incorporated into the general purpose program DADS using user-defined subroutines. The simulation results of this developed program is compared to those of the railway vehicle dynamics analysis program AGEM. Since the module is based on DADS, various simulation environments can be considered.