• 한국융합학회논문지
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• 제11권9호
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• pp.425-432
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• 2020

본 연구는 간호대학생들의 정신건강간호에 대한 교육요구도를 알아보고, 특별히 시뮬레이션으로 융합 교육이 필요한 영역에 대한 우선순위를 확인하고자 진행되었다. 140명의 간호대학생들에게 설문을 통한 조사가 2020년 3월~5월 사이에 이루어 졌다. 정신건강간호학에 대한 교육요구도와 조현병 환자간호에 대한 교육요구도는 각각 19문항과 15문항의 자가응답설문을 통해 이루어졌다. 추가적으로 3개의 서술형 질문을 통해 이전 시뮬레이션 경험에 대한 조사가 이루어 졌다. 조현병환자 간호에 대해 높은 교육요구도가 확인되었으며, 의사소통능력에 대한 교육요구도가 정신건강간호학과 조현병 환자간호 모두에서 가장 높게 나타났다. 표준화환자, 팀워크, 교수자로부터 피드백이 정신건강 간호학 시뮬레이션 교육의 긍정적 경험을 이끌어낸 것으로 확인되었다. 본 연구결과, 의사소통기술 향상을 위한 간호교육이 가장 우선시 할 필요가 있다. 잘 설계되고 실제와 같은 임상경험을 제공할 수 있는 시뮬레이션을 통한 융합교육이 최상의 학습성과를 만들어낼 것이다.

• 한국산업융합학회 논문집
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• 제3권3호
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• pp.265-273
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• 2000

Basic simulation program for Vuilleumier cycle heat pump was developed that can use precise VMHP design and analysis. VMHP system was divided 11 sections in simulation. Simulation was used adiabatic model analysis and that considered with heat transfer performance for heat exchanger, regenerator loss, conduction loss, shuttle loss, pumping loss and pressure loss by flow friction. Specially, friction loss of connection pipe between heat compression side and heat pump side, leakage of rod seal and piston seal was considered in the analysis.

• Journal of electromagnetic engineering and science
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• 제16권1호
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• pp.1-6
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• 2016

Computer simulations were conducted to demonstrate the generation of microwave-induced thermoacoustic signal. The simulations began with modelling an object with a biological tissue characteristic and irradiating it with a microwave pulse. The time-varying heating function data at every particular point on the illuminated object were obtained from absorbed electric field data from the simulation result. The thermoacoustic signal received at a point transducer at a particular distance from the object was generated by applying heating function data to the thermoacoustic equation. These simulations can be used as a foundation for understanding how thermoacoustic signal is generated and can be applied as a basis for thermoacoustic imaging simulations and experiments in future research.

• 한국의학물리학회지:의학물리
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• 제28권3호
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• pp.83-91
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• 2017

In this work, we investigated the recently proposed phase-contrast x-ray imaging (PCXI) technique, the so-called single grid-based PCXI, which has great simplicity and minimal requirements on the setup alignment. It allows for imaging of smaller features and variations in the examined sample than conventional attenuation-based x-ray imaging with lower x-ray dose. We performed a systematic simulation using a simulation platform developed by us to investigate the image characteristics. We also performed a preliminary PCXI experiment using an established a table-top setup to demonstrate the performance of the simulation platform. The system consists of an x-ray tube ($50kV_p$, 5 mAs), a focused-linear grid (200-lines/inch), and a flat-panel detector ($48-{\mu}m$ pixel size). According to our results, the simulated contrast of phase images was much enhanced, compared to that of the absorption images. The scattering length scale estimated for a given simulation condition was about 117 nm. It was very similar, at least qualitatively, to the experimental contrast, which demonstrates the performance of the simulation platform. We also found that the level of the phase gradient of oriented structures strongly depended on the orientation of the structure relative to that of linear grids.

• 한국융합학회논문지
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• 제9권7호
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• pp.355-364
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• 2018

본 연구는 문제중심학습과 시뮬레이션 실습 융합교육이 간호대학생의 간호지식, 자신감, 비판적 사고성향 및 문제해결능력에 미치는 효과를 파악하고자 시도되었다. 연구 대상자는 S지역 S대학교 4학년 간호상황실습2 교과목을 수강한 45명의 학생으로 자료는 자가 보고식 설문지를 이용하여 시뮬레이션 실습 전 후에 수집하였다. 문제중심학습과 시뮬레이션 실습 융합교육은 1주차에 2시간씩 3주차에 걸쳐 진행되었고, 융합교육 후에 간호지식, 자신감, 비판적 사고성향 및 문제해결능력 점수가 향상되었다. 간호지식, 자신감 및 비판적 사고성향은 문제해결능력과 양(+)의 상관관계가 나타나 문제중심학습과 시뮬레이션 실습 융합교육의 효과가 있음을 검증하였다. 따라서 다양한 주제의 문제중심학습과 시뮬레이션 실습을 융합한 교육 프로그램이 개발되고 활용되어야 한다.

• Wind and Structures
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• 제24권3호
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• pp.223-247
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• 2017

By using numerical simulation, vast and detailed information and observation of the physics of flow over a train model can be obtained. However, the accuracy of the numerical results is questionable as it is affected by grid convergence error. This paper describes a systematic method of computational grid refinement for the Unsteady Reynolds Navier-Stokes (URANS) of flow around a generic model of trains using the OpenFOAM software. The sensitivity of the computed flow field on different mesh resolutions is investigated in this paper. This involves solutions on three different grid refinements, namely fine, medium, and coarse grids to investigate the effect of grid dependency. The level of grid independence is evaluated using a form of Richardson extrapolation and Grid Convergence Index (GCI). This is done by comparing the GCI results of various parameters between different levels of mesh resolutions. In this study, monotonic convergence criteria were achieved, indicating that the grid convergence error was progressively reduced. The fine grid resolution's GCI value was less than 1%. The results from a simulation of the finest grid resolution, which includes pressure coefficient, drag coefficient and flow visualization, are presented and compared to previous available data.

• 한국통신학회논문지
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• 제21권8호
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• pp.1905-1913
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• 1996

The convergence characteristics of an LMS type Equalizer whose coefficient are multiple adapted in a symbol time period by recycling the received data are analyzed. The theoretical analysis shows that the data-recycling LMS technique can increase convergence speed by (B+1) times, where B is the number of recycled data. The results of the computer simulation demonstrate that the simulation results are in accordence with the theoretical analysis and the superiority of the equalizer algorithm.

• 한국멀티미디어학회논문지
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• 제19권2호
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• pp.504-511
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• 2016

3D simulation programs or games on a smart phone and a personal computer have often employed 3D graphic processing techniques and 3D graphical views. However, the user interfaces in those 3D programs have sticked to take a typical 2D style user interface and thus the combination of a 2D user interface view and a 3D simulation view give us a mismatched sense. Since a 2D user interface has been based on the windows controls, it causes sometime DC conflicts between a simulation view and an interface view. Therefore, we will implement the UI developing tool which can be inserted into the pipeline structure for the development of a 3D simulation software and also follows the view-handler design pattern in Microsoft windows system. It will provide various graphical effects such as the deformation of UI depending on the view direction of simulation view and the sitting pose of user. This developing tool gives the natural user interface which heightens the sense of unity with a given 3D simulation view.

• 한국통신학회논문지
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• 제21권6호
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• pp.1533-1545
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• 1996

In this paper, the design and implementation of echo canceller with new variable step size algorithm is discussed. The method used in the new algorithm is to periodically adopt the test function which helps an optimal coefficient tracking. This algorithm outperforms LMS and VS algorithms in convergence speed and steady state error. As the period of test function is decreased, the speed of convergence is improved, but the number of calculation is increased, then the trade off between these parameters must be considered. Simulation results show new algorithm outperforms LMS and VS algorithms in convergence rate. For the design of hardware, circuit is designed with VHDL, and synthesized with Act1 withc is a FPGA library of ActelTM in use of synovation of InterGraph$^{TM}$. Verification of the synthesized circuit is carried out with simulator DLAB. The circuit based on the algorithm which is suggested in this paper calculated 7 radix places of inary number. A simulation data for the verification is based on the data of algorithm simulation. When the same input data is applied to the both simulation, output results of circuit simulation had slight difference in compare with that of algorithm simulation. The number of used gate is about 5,500 and We have 5.53MHz in maximum frequency.y.

• 한국융합학회논문지
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• 제2권2호
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• pp.67-71
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• 2011

본 논문은 보건과학분야에서 활용되는 마네킹시뮬레이션 교육을 알아보고자 한다. 마네킹 시뮬레이션은 의과대학 교육뿐 아니라, 응급구조학과 교육, 구조구급 분야에 종사하는 소방공무원, 간호사, 치과대학, 마취과학등 의료의 여러 영역에서 다양하게 이용되고 있다. 본 연구는 시뮬레이션의 역사, 시뮬레이션의 진화과정, 시뮬레이션을 이용한 문제중심학습(problem-based learning, PBL)의 활용에 이르기까지 마네킹시뮬레이션 교육의 현황을 설명하고자 한다.