• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.35-36
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• 2012

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.11 no.4
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• pp.499-510
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• 1999

A computer program was developed for simulating performance(capacity, power consumption and etc.) of air-conditioners using compressor, fin-tube heat exchanger and capillary tube. The program consists of five modules, condenser, evaporator, compressor, capillary tube simulation modules and properties modules of refrigerant and moist air, The present program is focused on R22 only, however can be easily extended for other refrigerants such as R407C and R410A just by adding property modules. The compressor simulation module utilizes performance maps supplied by manufacturers-map-based model. The condenser and evaporator simulation modules are modeled using tube-by-tube method. Simulation results(capacity and power consumption) were compared with calorimeter test results of actual air-conditioners of window and split types, where more than 82% of the data lied within ${\pm}5$% of the predicted results.

• Journal of Digital Convergence
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• v.16 no.10
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• pp.301-311
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• 2018

Purpose: The purpose of this study was to examine the effects of the simulation-based cooperation program on self-efficacy, social problem-solving ability and college life adjustment of health college students. Methods: A nonequivalent control group pre-posttest design was used. Sixty-eight students were in the experimental group receiving the simulation-based cooperation program, and 68 were in the control group with no treatment. Results: There were significant increases in self-efficacy(z=-4.70, p<.001) and college life adjustment(t=2.03, p<.05) in the experimental group compared to the control group. However, there was no difference in the social problem-solving ability (z=-1.87, p=.061) between the experimental and control groups. Conclusion: The findings indicate that the simulation-based cooperation program has a significant effect on improving self-efficacy and college life adjustment in health college students. Thus the simulation-based cooperation program to promote the social problem-solving ability needs to be more developed and research related with cooperation program is further needed.

• Journal of the Korean Society for Railway
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• v.6 no.2
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• pp.100-107
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• 2003

This paper presents development of train performance simulation(TPS) program to analyze traction performance, braking performance and energy consumption for Korea high speed railway system. The conventional TPS program have some inconveniences such as DOS-based platform, user interface and limited function. The simulation technique model using scenario menu, various analysis function and object-oriented design/programming is presented. This simulation result have been compared with Alstom's for the Seoul-Pusan High Speed Rail Project.

• Journal of Korean Academy of Nursing
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• v.43 no.4
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• pp.468-477
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• 2013

Purpose: This study was conducted to develop a simulation-based education program for newborn emergency care based on most needed topics found from the needs assessment. This study consisted of two phases: developing the program and evaluating its effectiveness. Methods: The effectiveness of the program was tested in July, 2012, with 49 junior nursing students from C Nursing College in Seoul, who did not have any clinical experience in newborn care. The experimental group was given a three-hour lecture, three hours of clinical training, and a two-hour simulation program, whereas the control group only had the three-hour lecture. Results: There was significant improvement in knowledge in both groups, but no significant differences according to educational methods. The experiment group was more confident of their care ($4.32{\pm}.29$) than the control group ($3.60{\pm}.29$) with the difference being significant (t=8.85, p<.001), and the experimental group was also more satisfied with the program (${\chi}^2$=4.60, p=.032). Conclusion: As the results indicate 'the neonatal emergency care program' increased learners' knowledge, confidence and satisfaction with the program, it should be integrated into clinical training in pediatric nursing curriculum and in-service programs for nurses. To increase generalization further verification studies with various learner groups are needed.

• Journal of the Korea Fashion and Costume Design Association
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• v.17 no.4
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• pp.55-66
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• 2015

The objective of this study is to propose a method by which movement fitness can be evaluated using a three-dimensional virtual garment simulation program. To this end, five types of jean pants for men were evaluated on the program by setting the avatars to make particular movements to examine the level of pressure on each body part. To verify whether the clothing pressure measurement produces valid and reliable results, virtual garment simulation program was utilized. The results indicated that there were significant differences in the levels of pressure on body parts depending on the type of test garment and motion. In addition, the clothing pressure measurement results were in line with the appearance evaluation results suggested by a previous study. Based on this set of results, the nomological validity of the clothing pressure measurement program used in this study was verified. Moreover, we employed an appearance evaluation along with the clothing pressure measurement to verify the reliability of the program; there was a high correlation between clothing pressure measurements and appearance evaluation measurements, indicating that measuring clothing pressures may well compensate for the limitations of appearance evaluation. We expect the results of this study to make valuable contributions in facilitating the digitalization of the fashion industry. Furthermore, this study also is significant in that it has suggested 3D virtual fitting programs as a solution to the long-criticized problem related to the evaluation of movement fitness in existing virtual garment simulation programs.

• Clean Technology
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• v.15 no.3
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• pp.165-171
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• 2009

In this study, we found out the relation between $FeCl_3$ recovering-concentration and stage number of extraction process for invar (Fe+Ni) etching process. In order to get the desired $FeCl_3$ recovering-concentration economically, we developed the simulation program for designing the optimal $FeCl_3$ extraction process. We got the key parameter for this simulation program through pilot scale experiments. The process simulation by the developed program could reduce the emission of waste etching solution as well as the treatment costs. In addition, the developed program could calculate the number of stage of the etchant recovering system and the process time to get the desired concentration of $FeCl_3$. This program was used to compute the optimal capacity of the etchant recovering system and applied to the optimization of the stage of the etchant recovering system in real IT industry.

• Journal of Biosystems Engineering
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• v.40 no.3
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• pp.232-237
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• 2015

Purpose: In Korea, wheat is dried using circulating cross-flow grain dryers. However, there is no research on wheat drying which can be utilized for the dryers. Therefore, this study developed and evaluated a simulation of the circulating cross-flow dryer, and examined the effects of various factors on drying performance. Methods: The simulation program was developed using drying models and was evaluated against wheat-drying experiments with a dryer having a 30-ton capacity. The influence of drying temperature, air volume, and grain falling rate on drying performance were examined through the simulation. Results: The experimental results validated the simulation program by showing the same root mean square error (RMSE) for moisture content (0.286%) and drying rate (0.056%/h) in both the experimental data and the simulation values. The appropriate wheat-drying parameter values, considering drying conditions, were determined to be $50^{\circ}C$ for drying temperature, $500m^3/min$ for air volume, and a grain falling rate of $36.0m^3/h$. Conclusions: The developed simulation program for circulating cross-flow dryers analyzed the influences of performance factors such as drying temperature, air volume, and falling rate on drying performance.

• Magazine of the Korean Society of Agricultural Engineers
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• v.32 no.E
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• pp.59-66
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• 1990

Abstract The formulation of the probabilistic finite element method was briefly reviewed. The method was implemented into a computer program for frame analysis which has the same analogy as finite element analysis. Another program for Monte Carlo simulation of finite element analysis was written. Two sample structures were assumed and analized. The characteristics of the second moment statistics obtained by the probabilistic finite element method was examined through numerical studies. The applicability and limitation of the method were also evaluated in comparison with the data generated by Monte Carlo simulation.

• Journal of the korean Society of Automotive Engineers
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• v.10 no.5
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• pp.9-16
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• 1988

엔진 크랭크축계의 비틀림진동은 엔진설계 및 제작에 있어서 오랜동안 주관심사였다. 크랭크축계의 비틀림진동에서 고려되는 문제는 비틀림진동계의 고유진동수와 이에 따른 차수별 엔진의 공진속도와 엔진의 공진속도에서의 비틀림진동각 및 크랭크축의 비틀림진동에 의한 토오크와 비틀림 응력 등이다. 당사에서는 simulation program을 개발했으며, 비틀림 진동측정 방법도 개발했다. 또한 비틀림진동 측정결과와 simulation결과의 비교로부터 simulation결과 및 측정결과의 정확도를 높여가고 있으며, simulation 방법의 개선을 모색하고 있다. 본 글에서는 이 program에 이용된 기본이론과 실험방법 및 댐퍼 선정 방법을 간단히 소개하고자 한다.