• Tunnel and Underground Space
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• v.24 no.6
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• pp.430-439
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• 2014

This study developed a simulation program for truck-loader haulage systems in an underground mine. A limestone underground mine in Korea was selected as a study area and investigated to design the simulation algorithm for truck-loader haulage systems. GPSS/H simulation language was utilized to develop the simulation program. Simulations were conducted to analyze the optimal number of haulage trucks dispatched in the 540 ML loading point by using the developed program. The simulation results showed that 8 trucks can maximize the daily production (2,076 ton). The real production (1,850 ton/day) of limestone ores was very similar to the simulated one (1,850.35 ton/day) when considers 7 trucks dispatched in the 540 ML loading point. In addition, average waiting time at loader were similar (waiting time by time study : 1.39 min, simulated waiting time : 1.35 min).

• Journal of the Korea Society for Simulation
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• v.26 no.3
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• pp.87-93
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• 2017

This study examines empirically whether appropriateness of training program, learning organization, and demographic factors enhance the effectiveness of training program for HRD in small and medium companies. The major findings are as follows: The appropriateness of training program, learning organization, and demographic factors of employee has a strong positive effect on the effectiveness of training program for human resource development and intent to participate in the training program in small and medium enterprise. The learning organization has a strong positive effect on the effectiveness of training program for human resource development and intent to participate in the training program in small and medium enterprise. Also effectiveness of training program for human resource development and intent to participate in the training program in small and medium enterprise is different according to demographic factors such as job type(blue collar job, office job, sales job), rank of job position, and the length of service in organization. The significant results of this study is that appropriate design of training program to make employees understand the purpose of education and trying to activate the learning organization can increase the effectiveness of traing program in small and medium enterprise.

• Korean Journal of Computational Design and Engineering
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• v.16 no.5
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• pp.351-360
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• 2011

Product systems are quickly and frequently changed because Product Life Cycle is continuously reduced and adopting new product is steadily fast. Thus, various studies are progressed using simulation which is one of digital manufacturing. The research that is concerning simulation of control verification for shorten the commissioning which has a lot of trial and error is in progress. Also, simulation of control verification has strength that it can catch the errors in advance. However, a control program in simulation needs virtual factory for representation of control information. For this reason, excessive time and energy is put into controlling the virtual factory. So, in this paper, we construct library which is using exist data, in order to overcome limitation of these problems. Furthermore, we suggest methodology which can model and verify the process more speedy using library. Especially, we give body to the BB/BR Line process which has many altering equipment and need high technology effectively using physical and logical modeling. We can set up a control simulation environment very rapidly, as well as cut process time down using our suggestion.

• Child Health Nursing Research
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• v.21 no.4
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• pp.293-301
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• 2015

Purpose: This study was done to analyze the effectiveness of simulation-based integrated practice program (maternal-child) on nursing knowledge, self-confidence, and clinical competence of nursing students. Methods: A nonequivalent control group pre-post experimental design was used to compare experimental and control group. The experimental group received the integrated simulation practice and the control group received a separate simulation for maternal care and for newborn care. Results: The experimental group who had the integrated simulation had significantly higher scores for self-efficacy on nursing handover (F=0.480 p=.012) and oxygen therapy in newborn care (F=3.262 p=.037), and for clinical competence (F=2.639, p<.001) and personal satisfaction with debriefing compared to the control group (F=2.179, p=.044). But the experimental group did not have significantly higher scores in nursing knowledge. Conclusions The results indicate that an integrated simulation practice is an effective practice method to improve self-confidence, clinical competence and satisfaction. Also this study had significance in providing a setting similar to the clinical situation.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.2
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• pp.439-449
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• 2016

The purpose of this study was to identify the effects of simulation-based education regarding care in a cardio-pulmonary emergency care as related to knowledge, critical thinking, and problem solving ability in nursing students. The study was conducted with a nonequivalent control group pre-posttest design. Seventy four participants were assigned to either the experimental group(34) or control group(40). The simulation-based cardio-pulmonary emergency care education included lecture, team-based practice, and debriefing, and it was implemented with the experimental group for a week from September 1 to December 11, 2015. Data were analyzed using chi-square, t-test and ANCOVA by using SPSS 21.0 program. The experimental group who had the simulation-based education showed significantly higher knowledge(F=24.930, p<.001), and critical thinking(F=5.951, p<.05) for cardio-pulmonary emergency care compared with the control group who had traditional education. However, there were no significant differences in problem solving ability(F=3.327, p>.072). The results indicate that a simulation-based education is an effective teaching method to improve knowledge and critical thinking in nursing students learning cardio-pulmonary emergency care. Further study is needed to identify the effect of a simulation-based team positive education program of nursing students.

• Journal of East-West Nursing Research
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• v.24 no.2
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• pp.91-100
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• 2018

Purpose: This study was conducted to identify the effects of a simulation practicum using standardized patients on nursing student's communication skills, critical thinking disposition and clinical competency. Methods: A one group pretest-posttest design was used. The participants consisted of 45 fourth year nursing students at G university. This study developed 2 scenarios for patients with diabetes mellitus and the simulation was conducted for an average of approximately 14 hours. Data were analyzed with descriptive analysis, t-tests and Cronbach's ${\alpha}$ using SPSS 21.0 program. Results: Communication skills, clinical competency and self-confidence for diabetic care were statistically improved; however, critical thinking disposition was not improved compared to that of pretest. Conclusion: Simulation practicum using standardized patients may be effective in enhancing communication skills, clinical competency and self-confidence for diabetic care among nursing students. In addition, standardized patients simulation program to promote the critical thinking needs to be developed and further research related to standardized patients simulation is in need.

• Journal of Ocean Engineering and Technology
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• v.33 no.5
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• pp.387-393
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• 2019

In this study, the free motion of a riser due to vortex shedding was numerically simulated with Large Eddy Simulation (LES) and Detached Eddy Simulation (DES) turbulence models. A numerical simulation program was developed by applying the Rhie-Chow interpolation method to the pressure correction of the OpenFOAM standard solver pimpleDyMFoam. To verify the developed program, the vortex shedding around the fixed riser at Re = 3900 was calculated, and the results were compared with the existing experimental and numerical data. Moreover, the vortex-induced vibration of a riser supported by a linear spring was numerically simulated while varying the spring constant. The results are compared with published direct numerical simulation (DNS) results. The present calculation results show that the numerical method is appropriate for simulating the vortex-induced motion of a riser, including lock-in phenomena.

• Child Health Nursing Research
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• v.29 no.1
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• pp.24-36
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• 2023

Purpose: This systematic literature review and meta-analysis explored extended reality (XR)-based pediatric nursing simulation programs and analyzed their effectiveness. Methods: A literature search was conducted between May 1 and 30, 2022 in the following electronic databases: MEDLINE, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), and CINAHL. The search period was from 2000 to 2022. In total, 6,095 articles were reviewed according to the inclusion and exclusion criteria, and 14 articles were selected for the final content analysis and 10 for the meta-analysis. Data analysis was performed using descriptive statistics and the Comprehensive Meta-Analysis program. Results: XR-based pediatric nursing simulation programs have increased since 2019. Studies using virtual reality with manikins or high-fidelity simulators were the most common, with six studies. The total effect size was statistically significant at 0.84 (95% confidence interval=0.50-1.19, z=4.82, p<.001). Conclusion: Based on the findings, we suggest developing standardized guidelines for the operation of virtual pediatric nursing simulation education and practice. Simultaneously, the application of more sophisticated research designs for effect measurement and the combined applications of various virtual simulation methods are needed to validate the most effective simulation methodology.

• Journal of the Ergonomics Society of Korea
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• v.5 no.2
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• pp.3-9
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• 1986

The present paper deals with obtaining the proper application criteria for the control mode, by using computer graphic simulation, in order to recover the error effectively occurring in the practical supervisory contol work of hyman-robot system. In these experiments the opteations by human and by control program are performed as control modes for recovering the error. And then we compare and analyze tow control modes taking task error and task time as performance measures and task difficulty as a variable factor. Consequently as the task difficulty increases, the task error in the operation by hyman tends to be less than in the operation by control program and the task time is superior in the operation by control program. Therefore, we suggest that two control modes should be used jointly for recovering the error and the operation by control program should be applied in major fraction of control and the operation by human in minor fraction of control.

• Transactions of the Korean Society of Automotive Engineers
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• v.10 no.1
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• pp.203-208
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• 2002

In order to reduce the booming noise caused by first bending mode of a drive shaft, this paper proposes a simulation program for prediction of the bending mode frequency of any tubular shaft. This program consists of a pre-processor for modeling of geometrical shape of the drive shaft with boundary conditions of various joints, a processor for constructing of global finite element matrices using beam elements and an eigen-solver based on MATLAB program. Using this simulation program, the effective and accurate FE model far a shaft attached to vehicle can be obtained by aid of database for stiffness of each joint. Thus the resonance frequencies and mode shapes of a shaft can be calculated accurately. Because the effect of the resonance on interior noise can be verified, more improved shaft will be proposed at the early stage of design.