• Journal of the Korean Society of Radiology
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• v.15 no.4
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• pp.519-524
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• 2021

As the COVID-19 situation continued to spread to the local community along with the spread due to influx, each university had to conduct all online classes and partially online classes. The purpose of this study was to investigate the satisfaction of learners with the content and lecture contents by paying attention to online non-face-to-face classes according to the change of the class environment in the Corona 19 situation. Satisfaction survey on online non-face-to-face class major subjects was analyzed using questionnaires from June 1 to June 11, 2021, targeting 2nd and 3rd year students in the Department of Radiology at S University in Daegu. As a result of the study, satisfaction with content and class content was found to be an average of 3.78 ± 0.75 points, and learning satisfaction was found to be an average of 3.00 ± 1.14 points. In addition, when taking online non-face-to-face classes, the correlation between students' class attitude and content and class content satisfaction was the highest (r=0.555, p<0.01), and it was found that there was also a correlation between content and class content satisfaction and learning satisfaction. (r=0.331, p<0.01). I think that satisfaction with non-face-to-face online classes can be improved if the quality of content is improved during non-face-to-face online major classes as well as more active interactions between students and professors.

• Journal of Industrial Convergence
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• v.20 no.6
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• pp.93-104
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• 2022

This study was done to identify the factors affecting the problem-solving ability of nursing students who have received online psychiatric nursing practice. The subjects of the study were 280 fourth-grade nursing students. The data were subjected to descriptive statistics, 𝑥²-test, t-test, one-way ANOVA, Pearson's correlation analysis, and multiple regression analysis using the SPSS 24.0 program. As a result of the analysis, the mean of each variable was learning satisfaction 4.03±.70, self-efficacy in learning 5.69±.82, transfer motivation 5.52±.86, and problem-solving ability was 3.65±.41. Learning satisfaction and problem-solving ability (r=.387, p<.001), self-efficacy in learning and problem-solving ability (r=.576, p<.001), transfer motivation and problem-solving ability (r=.536, p <.001) showed a significant correlation. Factors affecting problem-solving ability were gender (𝛽=.11), grade point average (𝛽=.12), motivation of personal major choice (𝛽=-.12), satisfaction of major (𝛽=.13), self-efficacy in learning (𝛽=.36) and transfer motivation (𝛽=.16), and the explanatory power of variables was 41.4%. Based on the results of this study, a follow-up study is required to identify the causal relationship between variables related to problem-solving ability.

• Journal of Korea Entertainment Industry Association
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• v.14 no.8
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• pp.315-322
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• 2020

This study was carried out to provide basic data for prevention of burnout by measuring levels of self-efficacy, social support and burnout that nursing students experienced during clinical practice and identifying factors influencing burnout. This is a descriptive research targeting 173 junior- and senior-year nursing students in Y area, and data were collected from October 15^th to November 4^th 2019. For data analysis, frequencies and percentages were calculated, and t-test and ANOVA were conducted along with the Scheffé test as a post-test. In addition, Pearson's correlation coefficients and multiple regression analysis were employed. The study results are as follows. There were significant differences in self-efficacy, social support and burnout depending on grades(t= -2.20, p=.029) and major satisfaction(F=3.62, p=.029) among general characteristics of nursing students. When analyzing correlations among self-efficacy, social support and burnout of nursing students, there was a positive correlation between self-efficacy and social support(r=.214, p=.005), a negative correlation between burnout and self-efficacy(r=-.253, p<.001) and a negative correlation between burnout and social support(r=-.175, p=.021). Major satisfaction(β= -.21, p=.006) had the biggest influence on burnout, and it was followed by self-efficacy(β= -.16, p=.032) and social support(β= -.15, p=.047). The explanatory power of the model was 13.8 percent. In conclusion, it is required to improve university life satisfaction and clinical practice satisfaction and develop programs, which enhance social support and self-efficacy, for preventing burnout of nursing students during clinical practice.

• Journal of Korea Entertainment Industry Association
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• v.13 no.1
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• pp.157-166
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• 2019

The purpose of this study was to investigate the level of professor trust, achievement motivation, and self-efficacy of health college students in G university, and to analyze the relationship between these variables and its influential factors to provide basic data on improvement of teaching methods and academic achievement. The study period was March 1 through 30, 2018. Study subjects were 276 health college students in G university located in G. City. The survey was conducted by the researcher, described the purpose of the study and distributed and collected the questionnaires. The questionnaire consisted of professor trust 27 items, achievement motivation 28 items and self-efficacy 24 items. As a result, professor trust was higher when the grade was lower and the degree of major satisfaction was better, and in order of the division of the health administration, the department of speech-language therapy, and the department of nursing. Achievement motivation was higher in the first grade than in 4th grade and when the degree of major satisfaction was better. Self-efficacy was higher in order of higher grades. Professor trust, achievement motivation, and self-efficacy were correlated with each other, and achievement motivation and self-efficacy influenced the professor trust. The result of this study suggests that the achievement motivation and self-efficacy of college students will be improved based on the mutual trust among the members of the university.

• Journal of Practical Agriculture & Fisheries Research
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• v.25 no.1
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• pp.14-19
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• 2023

In summer, the natural ventilation performance for varying greenhouse width is very important in the glasshouses for year round cultivation. The effect of the side openings and greenhouse width on natural ventilation performance was analyzed by simulation. The necessary ventilation rate with different solar radiation transmittance increased significantly when the outside temperature grows higher. The necessary ventilation rate of 40% transmittance was about half of that of 90% transmittance. In consequence, shading effect on temperature control in greenhouse is significant in summer. When the total area of the openings for ventilation is constant, the maximum ventilation rate happens when the area of roof openings is equal to the area of side openings. This maximum ventilation rate is about 3 times of that of the greenhouse with roof openings and without side openings. Therefore, the side openings are advantageous to improve the natural ventilation in greenhouses. As the greenhouse width increases, the influence of side openings on the ventilation rate is becoming smaller. If the natural ventilation rate of the greenhouse with roof and side openings is to become double of that of the roof openings only, the width should be narrower than 38.4m for the Venlo type and 64m for Wide span type.

• Journal of Industrial Convergence
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• v.20 no.12
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• pp.245-250
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• 2022

This study aims to identify the factors that affect the satisfaction of practice among nursing students who participated after replacing it with on-campus practice in a situation where practice was not possible due to COVID-19. Data were collected from 144 nursing students who participated in the clinical practice alternative campus practice conducted from September 13 to December 3, 2021 at a university located in G province. Data analysis was analyzed by ANOVA, Pearson's correlation coefficient, and hierarchical multiple regression analysis. The subject's satisfaction with practice is a general characteristic, self-efficacy (r=.540, p=.000), self-leadership (r=.553, p=.000), and critical thinking ability (r=.382, p=.000). , there was a significant correlation between major satisfaction (r= .248, p=.003). Variables that affect the clinical performance of the subjects were self-efficacy 20.4% (𝛽=.266, p=.047), self-leadership 51.2% (𝛽=.271, p=.047), and satisfaction with practice The explanatory power of the variables was 33.8%. Therefore, it is necessary to develop and apply a curriculum that can increase self-leadership and self-efficacy in order to increase the satisfaction of nursing students' practice.

• Journal of Digital Convergence
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• v.20 no.1
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• pp.309-316
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• 2022

This study is a study on the YouTube e-learning advanced service plan in the non-face-to-face era. The trends in education change were examined through literature research and prior research, and improvement measures were suggested through online surveys and in-depth interviews. As for the research method, the first online survey was conducted based on the Honeycomb model and the Likert 5-point scale targeting 90 MZ generation who have experience learning on YouTube for a total of 14 days from October 15 to 28, 2021. A second in-depth interview was conducted with 6 people who answered that the frequency of learning through YouTube is high. As a result of the experiment, users thought that there was an improvement point according to the purpose of learning, and they were able to derive elements that felt a problem in common. In addition, I proposed a new YouTube learning platform through additional questions. Through this study, it is expected that YouTube e-learning service reference materials can be used to respond to the post-non-face-to-face era.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.3B
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• pp.289-301
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• 2009

In this work, wave run-up heights and resultant wave forces on a vertical revetment due to tsunami (solitary wave) are investigated numerically using a numerical wave tank model called CADMAS-SURF (CDIT, 2001. Research and Development of Numerical Wave Channel (CADMAS-SURF). CDIT library, No. 12, Japan.), which is based on a 2-D Navier-Stokes solver, coupled to a volume of fluid (VOF) method. The third order approximate solution (Fenton, 1972. A ninth-order solution for the solitary wave. J. of Fluid Mech., Vol. 53, No.2, pp.257-271) is used to generate solitary waves and implemented in original CADMAS-SURF code. Numerical results of the wave profiles and forces are in good agreements with available experimental data. Using the numerical results, the regression curves determined from the least-square analysis are proposed, which can be used to determine the maximum wave run-up height and force on a vertical revetment due to tsunami. In addition, the capability of CADMAS-SURF is demonstrated for tsunami wave forces acting on an onshore structure using various configuration computations including the variations of the crown heights of the vertical wall and the position of the onshore structure. Based on the numerical results such as water level, velocity field and wave force, the direct effects of tsunami on an onshore structure are discussed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.5B
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• pp.473-482
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• 2009

This study numerically discusses wave forces acting on a vertical wall such as breakwaters or revetments, subjected to incident undular or turbulent bores. Due to the complex hydrodynamics of bore, its wave forces have been predicted, mainly through laboratory experiments. Numerical simulations in this paper were carried out by CADMAS-SURF(CDIT, 2001), which is based on Navier-Stokes momentum equations and VOF method (Hirt and Nichols, 1981) for tracking free water surface. Its original source code was also partly revised to generate bore in the numerical water channel. Numerical raw data computed by CADMAS-SURF included great strong spike phenomena that show the abrupt jumps of wave loads. To resolve this undesired noise of raw data, the band-pass filter with the frequency of 5Hz was utilized. The filtered results showed reasonable agreements with the experimental results performed by Matsutomi (1991) and Ramsden (1996). It was confirmed that CADMASSURF can be applied to the design of coastal structures against tsunami bores. In addition, the transformation process and propagation speed of bores in the same 2-d water channel were discussed by the variations of water level for time and space. The numerical results indicated that the propagation speed of bore was changed due to the nonlinear interactions between negative and reflected waves.

• Journal of Practical Agriculture & Fisheries Research
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• v.19 no.1
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• pp.139-151
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• 2017

This study was conducted to confirm the rumen fermentation characteristics of large-scale CoenzymeQ10(CoQ10) producing bacteria R. spharoides in rumen. We conducted in vitro continuous culture test to investigate the characteristics of rumen fermentation with 5% R. spharoides as a direct fed microorganism. A rumen microbial fermentation characteristic has stability at after 12 days for 15 day of experimental period. pH value, NH₃-N, microbial protein synthesis, ADF digestibility and NDF digestibility were not shown significantly differences between control and treatment. However, UDP was significantly higher in treatment than control (p<0.05). CoQ10 concentration was 336.0mg/l with 5% R. spharoides. On the other hands, CoQ10 was not detected without R. spharoides. Our study was shown that R. spharoides can produce CoQ10 in rumen environment without harmful effects on rumen fermentation parameter. CoQ10 in rumen may transfer into cow milk through cow metabolism. This strategy might be helpful for producing functional dairy cow milk.