• Journal of the Korean Society for Railway
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• v.11 no.3
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• pp.257-262
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• 2008

Design and analysis of road subgrade system, which is exposed to repetitive loading condition, uses resilient modulus. The behavior of railway subgrade system will not be quite different from that of road system. Following this phenomenological feature of the subgrade system, this paper introduces the implementation of the resilient modulus based constitutive model on a commercial finite element software. The implementation of the resilient modulus models such as K-${\theta}$ and Uzan on a FE program has been conducted previously. These model assumes that the material state reaches to the nonlinear elastic condition and with further application of repetitive loads, the response of material is completed in elastic condition. According to the recent test results performed on cohesive subgrade soils, however, permanent deformation occurs with repetitive loads. With aids of previously suggested models the permanent deformation cannot be modeled. To overcome such limitation a plastic potential derived from the test results and simple failure criterion based constitutive model is developed. The comparison between the analysis and test results shows a good correlation.

• Journal of Digital Convergence
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• v.18 no.9
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• pp.403-411
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• 2020

The purpose of the study is to investigate the impact of social support and mental health of health science college students on their resilience. 191 students enrolled in 3 health science colleges located in J Province were asked to answer structured questionaries, and the collected data was analyzed by T-test, ANOVA, Pearson correlation, and regression analysis with SPSS 24.0 software. The result of this study shows that social support has positive correlation to resilience, whereas mental health has statistically significant negative correlation to psychological resilience. Subfactor of social support that affect psychological resilience are material and repetitional support, and subfactor of mental health are anxiety and college life satisfaction, which is also a sociologic characteristic, with explanatory power of 48.9%. The study suggests the need to develop and apply measures to improve social support and mental health of health science college students to embolden their resilience.

• Journal of Digital Convergence
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• v.14 no.7
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• pp.29-36
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• 2016

This study aimed to examine differences in the academic achievement depending on general characteristics of adolescents, and to verify the predictors influencing them according to school levels. For the study, 555 adolescents were surveyed at B county of Gyeongbuk province in September 2015. The results were as follows. First, it was found out that the adolescents' academic achievement was different depending on school level, family type, and economic status. Second, the predictors of the academic achievement in middle school students were self-esteem, age, number of friend, and aggression. Third, the predictors of the academic achievement in high school students were self-esteem, age, school level, and violence recognition. Based on these results, the ways to improve the academic achievement were suggested.

• Korean Journal of Childcare and Education
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• v.10 no.6
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• pp.43-56
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• 2014

The purpose of this study was to analyze the differences of preschoolers' utterance features by their gender and play situation type. For this purpose, a total of 40 5-year-old children participated in this study. Dyad were participated in each play session during 10 minutes. The play session was videotaped and the videotaped data were transcribed by CBS(2014). The collected data were analyzed by using a independent t-test and paired t-test. The main results are as follows. First, girls' MLU-e, MLU-w, MLU-m were longer than that of boys in a familiar play situation. Second, preschoolers' MLU-w was longer in an unfamiliar play situation than in familiar ones and preschoolers' type-token ratio were higher in an unfamiliar play situation than in familiar ones. Implications for the importance of preschoolers' spontaneous speech are discussed.

• Journal of Digital Contents Society
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• v.6 no.4
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• pp.235-242
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• 2005

This Study examines influencing factors such as input, process, and output variables on1 student's satisfaction in cyber-education. That is to study on the effectiveness of input, process, and output variables for cyber-education and how does student's interaction moderate influencing factors and student satisfaction. The study was carried out through literature and empirical study. Questionnaire was used to varify the hypothesis based on which the input-process-output with system models were established. The result of hypothesis verification in this study is as follows : First, learning hour and grade showed a positive influence on the students' satisfaction in learning factors. Second reliant of professor, recognized teaming participate, and contents showed a positive influence on the students' satisfaction in system factors. Third, an interesting findings emerged throughout the analysis, showed that process variables were rather meaning factor than input variables.

• Journal of Convergence for Information Technology
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• v.10 no.3
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• pp.141-150
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• 2020

This study examined the experience of cosmetic surgery and its related factors in order to establish the correct values for female college students' appearance. Data were collected from 283 female college students in Gyeonggi, Chungcheong, and Jeolla-do provinces, and analyzed by Chi-square test, T-test and Binary logistic regression using SPSS 18.0 program. As a result, the experience rate of cosmetic surgery was 66.1%, and the experience of cosmetic surgery was high as the grade was increased. The most common source of information was 'family and people around' at 45.9%, and the cosmetic surgery type 'eye surgery' was the highest at 25.8%. Appearance of interest and cosmetic surgery recognition were higher than those who had no cosmetic surgery experience. Factors related to cosmetic surgery experience were grade, allowance, and appearance interest. It is necessary to prepare basic data on cosmetic information and to develop a program to establish proper beauty values, and education and counseling to make rational decisions about cosmetic surgery will be required.

• Journal of Korean Society of Steel Construction
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• v.25 no.2
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• pp.141-151
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• 2013

In this paper, lateral-torsional buckling(LTB) strength of HSB800 steel plate girder under uniform bending moment was estimated by the nonlinear analysis. Doubly symmetric sections with slender, noncompact and compact webs were considered and the LTB strength in the inelastic range was estimated by taking initial imperfection and residual stress into account. For the numerical analysis, single-panel model and three-panel model were considered and analysis of SM490 steel plate girder was performed to judge the validity of the constructed models by comparing the results with AASHTO, AISC, Eurocode and KHBDC(LSD) codes. By using the same models, LTB strength of HSB800 girder was evaluated and it was acknowledged that the current codes can be applied to HSB800 girders with doubly symmetric section in the inelastic LTB range.

• Korean Journal of Social Welfare Studies
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• v.49 no.3
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• pp.61-86
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• 2018

This study set out to investigate relationship between job satisfaction and marital satisfaction and especially mediating effect of partner abuse. Data came from Korea Welfare Panel Survey 2017. The final sample size was 2,610 married employed persons in South Korea. Analysis methods were multiple regression analysis. The major findings of this study are as follows. First, higher job satisfaction influenced directly higher marital satisfaction, and influenced also indirectly through lower partner abuse. Second, married employed women showed lower level of marital satisfaction than married employed men. Third, married employed women's job satisfaction was more influential factor to explain marital satisfaction than married employed men's. The limitations and implications of the findings from this study were discussed with respect to further studies.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.193-193
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• 2019

기후변화로 인한 거대 자연재해 발생의 위험이 지속적으로 증가하고 있으며, 국외의 경우 주요정부기관, 보험사 및 연구기관 중심으로 자연재해 피해예측 모델을 개발하여 사용하고 있다. 침수사고 인한 피해는 건물은 물론이고 가재도구, 재고자산, 기계시설 등의 내용물에서도 발생하며, 건축물 신축단가 등을 이용해 비교적 쉽게 자산가치를 산정할 수 있는 건물구조물과 다르게, 건물내용물의 자산가치는 시설물의 업종, 용도, 사용자 특성 등에 따라 변동성이 큰 특징이 있다. 내용물의 피해액 추정을 위해 자연재해 피해예측 모델은 건물 구조물과 내용물 가치의 비율인 CSVR(Contents to Structure Value Ratio)을 사용하며, CSVR은 시설물 용도에 따른 자산가치평가 통계를 이용해 산정할 수 있다. 충분한 자산가치평가 DB를 확보할 경우 CSVR의 정확도 확보가 가능할 것이며, 이를 위해 국내에서는 민간보험사의 재물보험 계약 4만여건의 건물, 내용물 보험가입금액을 행정안전부 도로명전자지도에서 분류하는 건물 용도에 따라 분석한 연구결과가 있다. 하지만, 일반적으로 보험가입단계에서 대략적으로 추정하는 보험가입금액과 실제 자산의 가치는 차이가 있을 수 있지만, 보험가입물건의 실제 자산가치는 일부만 DB화 되어 있는 단점이 있다. 본 연구에서는 사고 발생 후 작성되는 손해사정보고서에서 평가한 정확한 자산가치 DB를 수집하여, 보험가입금액을 기준으로 산정한 CSVR의 결과와 비교하였다. 손해사정보고서에서 평가한 실제 자산가치를 기준으로 분석한 CSVR과 보험가입금액을 기준으로 산정한 CSVR은, 업종에 따라 유사하거나 큰 차이를 보이는 경우도 있었으며, 침수로 인한 정확한 피해액 추정을 위해서는 보다 양질의 DB확보를 통한 CSVR의 정확도 확보가 필요한 것으로 분석되었다.

• Journal of Convergence for Information Technology
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• v.11 no.12
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• pp.39-48
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• 2021

The purpose of this study was to identify the degree of grit, resilience, academic self-efficacy, and learning flow of nursing college students in the COVID-19 situation to identify the factors that influence burnout. Data were collected by using questionnaires from 155 students who were in 3rd year of the nursing college in G city, from May 11 to May 25, 2021. Data were analyzed by t-test, ANOVA, Scheffe, Kruskal-Wallis test, Pearson's correlation, and multiple regression. Statistically, burnout showed a significantly negative correlation with grit, resilience and academic self-efficacy. Influencing factors on burnout were resilience, satisfaction of major, academic self-efficacy and satisfaction of clinic practice accounting for 60% of the total change. Based on this study, strategies to enhance resilience, satisfaction of major, academic self-efficacy and satisfaction of clinic practice are required to reduce the burnout of nursing college students in the COVID-19 situation.