• Journal of Korean Tunnelling and Underground Space Association
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• v.21 no.2
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• pp.211-225
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• 2019

Recently, earthquakes have occurred throughout the entire region of Korea and seismic analysis studies have been actively conducted in various fields. SSI analyses studies considering ground have been carried out consistently. However, few comparative analyses have been performed on the dynamic behavior of buildings according to numerical analysis method in the case of the previous dynamic analyses considering grounds. Therefore, in this study, the dynamic analyses were performed on a high-rise building by using both a finite element program MIDAS GTS NX and a finite difference program FLAC 2D. The results were compared and analyzed each other. As a result, both the maximum compressive and tensile bending stresses of above ground and below ground part were estimated to be a little larger by MIDAS GTS NX than by FLAC 2D. However, the maximum horizontal displacement value, the horizontal displacement distribution, and the position of weak part were turned out to be similar in both analysis programs. Therefore, it can be concluded that there is no difference in using either a finite element program or a finite difference program for the convenience of a user for a dynamic analysis.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.1
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• pp.315-324
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• 2017

The purpose of this study is to help with education by applying the learning clinic program to the maladjusted children to improve the emotional stability and academic achievement. In order to find the components of the learning clinic program, we have classified self efficacy, learning motivation, anxiety, and academic stress as emotional factors and the results of Korean language, mathematics, sociology and science as academic achievement factors to examine the effects of the program. The results obtained in this study are followings. Firstly, there was significant difference in self efficacy and anxiety between boys and girls among emotional factors, and there was significant difference in math between boys and girls among academic achievement factors. Secondly, after applying the learning clinic program, significant difference is found in all factors such as self efficacy, learning motivation, anxiety and academic stress, and there was also a significant difference in Korean language, mathematics, sociology and science among academic achievement factors. In conclusion, the learning clinic program was helpful to maladjusted children by improving emotional stability and academic achievement.

• Journal of Korean Society of Forest Science
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• v.104 no.1
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• pp.150-161
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• 2015

The purpose of this study was to obtain the basic data for the effective development and operation of forest healing by analysing the preference of adults on the forest therapy program. The survey of 516 normal adults on the forest therapy program was conducted. Using SPSS 21.0 Program, data analysis of descriptive statistics and correlation analysis of each program confirmed number of covariate, and so we conducted a factor analysis to short meaningful data. And then we looked at the forest healing program preference difference according to demographic characteristics(sex, age, residence, occupation) through reliability analysis, frequency analysis, T-test, analysis of variance(ANOVA). Facter analysis was performed by use of the VariMax orthogonal rotation factor analysis to abbreviate 37 forest therapy program. Through this, the program has been reduced such as 7 program group(1: psychology-based treatment, 2: teaching and counselling-based treatment, 3: camping and forest bath-based treatment, 4: diet-based treatment, 5: nature and plant-based treatment, 6: meditation-based treatment, 7: respiration and yoga-based treatment) and 7 independent programs(1: sleeping in the forest, 2: vision quest, 3: soaking in water, 4: walking wearing shoes, 5: viewing the forest, 6: mountaineering, 7: athletics in the forest). With this criterion, the forest therapy program difference in accordance with sex, age, residence, occupation has been investigated. First, it was verified that there was a significant difference between male and female in the group of such as psychology-based treatment, diet-based treatment, mountaineering. Second, there appeared a significant difference in groups such as teaching and counselling-based treatment, camping and forest bath-based treatment, nature and plant-based treatment, respiration and yoga-based treatment, athletics in the forest. Third, according to the residence, there appeared a significant difference in groups such as psychology-based treatment, teaching and counselling-based treatment, diet-based treatment, nature and plant-based treatment, meditation-based treatment, vision quest, mountaineering, athletics in the forest. Fourth, according to the occupation, there appeared a significant difference in groups such as nature and plant-based treatment, medication-based treatment, vision quest, walking wearing shoes, viewing the forest, mountaineering. As shown before, it seems to be necessary that we should be mindful of this investigation which shows variety of preference of adults on the forest therapy program according to demographic characteristics. We expect the results of this study to be utilized as basic data for the development of forest therapy program targeting on adults.

• Proceedings of the Korean Geotechical Society Conference
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• 2003.03a
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• pp.485-492
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• 2003

In this study, We peformed on the effective evaluation of slope berm construction using slope stability analysis programs. The effective evaluation of slope berm construction was performed by stability of slope and economy of construction. This time, used slope stability analysis programs are Talren97 that use Limit equilibrium method (LEM) and FLAC-SLOPE that use finite difference method (FDM), and carried out using Rocfall program to evaluate slope stability by rockfall occurrence.

• The korean journal of orthodontics
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• v.52 no.6
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• pp.420-431
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• 2022

Objective: This systematic review aimed to evaluate periodontal parameters in orthodontically tractioned teeth compared with the respective non-tractioned contralateral teeth. Methods: Search strategies were developed for six electronic databases and gray literature. Random-effects meta-analyses were performed for the outcomes of interest. Furthermore, the certainty of the evidence was assessed using the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) tool. Results: Overall, 2,082 articles were identified, of which 24 were selected for the qualitative synthesis. A significant difference was observed between the impacted and contralateral teeth (mean difference [MD] = 0.25; 95% confidence interval [CI] = 0.10-0.40; I² = 0%) when the gingival index was evaluated. Additionally, impacted teeth showed a greater probing depth, with a significant mean difference between the groups (MD = 0.14; 95% CI = 0.07-0.20; I² = 6%). Most studies had a low risk of bias; however, the certainty of the evidence was very low owing to the design of existing studies. Conclusions: The evidence in the literature indicated that tractioned teeth might show worsening of periodontal parameters related to the gingival index and probing depth; however, the evidence remains uncertain about this outcome. Furthermore, probing depth should be considered regarding its clinical significance because of the small effect size observed.

• The Korean Journal of Emergency Medical Services
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• v.15 no.2
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• pp.15-26
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• 2011

Purpose: The purpose of this study was to develop and implement the educational program of Life Safety Support for parent. Methods: This study was used to develop children life safety support education program. The education program was utilized as multimedia, practice and discussions to increase understanding and effectiveness of learning. The data for this study was collected from June to December, 2010. There were two forms of evaluations, pretest and posttest with an intervention of education program. The analysis of the collected data was analyzed by descriptive analysis, t-test and paired t-test using the SPSS 10.0 program. Results: 1. the experimental group, who was given an education program before the test, got higher marks on the Life Safety support knowledge than the control group. There was a significant difference in knowledge between experimental group and control group(t=6.678, p=.000). 2. the experimental group got higher marks on the action evaluation than the control group. There was a significant difference in the certainty of action(t=8.546, p=.000) between experimental group and control group. Conclusion: This study examined how Life Safety support education program increased effectiveness in the knowledge and action of children Life Safety support.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2003.05a
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• pp.110-114
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• 2003

In this study, a performance simulation program for a turbojet engine using SIMULINK, which can provide the GUI(Graphic User Interface) environment, was newly proposed. Performance analysis results using the SIMULINK performance program were compared with them using the FORTRAN performance program that was previously developed. According to comparison result, it was noted that performance analysis results between two programs have little bit big difference. This difference seems to be due to different component matching algorithm at each program, it will be improved later.

• Journal of the Korean Society of Earth Science Education
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• v.6 no.2
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• pp.136-144
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• 2013

The purpose of this study is to examine the effects of creative thinking activities and scientific attitude through the use of storytelling in the STEAM program for elementary students. For the purpose of this study, a teaching plan and worksheet for students using storytelling in STEAM was developed and applied. The results of this study are as follows: First, the change in students' creative thinking activities by applying the STEAM program using storytelling has statistically meaningful difference (p<.05). Second, the improvement in the scientific attitude score has statistically meaningful difference(p<.05). Third, according to the analysis of a questionnaire used to evaluate the program, students had a positive perception of the STEAM program and gained higher level of satisfaction about the lesson. Therefore, using storytelling STEAM program applied in this study might be useful to improve creative thinking activities, and can be expected to improve scientific attitude and should be widely applied to gifted education.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.1
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• pp.116-119
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• 2010

In this work, we presented the characterization of 3 dB branch type directional couplers by using High-Tc superconducting thin films. To do this, we deposited YBCO superconducting thin films on MgO substrates by using rf-magnetron sputtering techniques. The designed center frequency was 408 MHz and the designed passband was 20 MHz. Also we designed 3 dB Power difference and $90^{\circ}$ of phase difference between port 3 and port 4. The even and odd mode analysis were used to characterize our directional couplers and em Sonnet (full wave analysis program) was utilized to the optimum design. We reported experimental results, including a center frequency, passband, half power characteristics and phase differences. We confirmed that experimental results were in good agreements with characterization by using full wave analysis program.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2007.04a
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• pp.771-776
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• 2007

Widespread propagation of failure can be triggered by localized damage to a structure because of fires, impact and explosion etc. In this paper, the progressive collapse analysis program is developed to automatically check the failed members and construct the modified structural model at each step. OpenSees, that is widely used in many research groups, was used for the developed progressive collapse analysis control program. The control program developed in this study automatically computes the damage indices of all the structural members and performance a progressive collapse analysis after the first failed member is selected. Using the developed program, we compared the progressive collapse behaviors of the example structures considering dynamic effects or not, and the difference of progressive collapse mechanism according to the modeling method of the failed members.