• Journal of Convergence for Information Technology
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• v.10 no.6
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• pp.49-58
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• 2020

This study was conducted to identify the changes in academic self-efficacy and self-directed learning ability after applying flipped learning using media convergence to the basic nursing practice courses. It is offering flipped learning to 22 students from the experimental group and 26 students from the control group. Data were collected from August 27 to December 3, 2019. The difference in academic self-efficacy before and after the flipped learning was no significant difference between the two groups. However, the difference in self-directed learning ability was 11.32 points in the experimental group and 0.23 points in the control group (t=2.32, p=.027). According to the results of this study, flipped learning using media convergence was found to be an effective teaching method to improve self-directed learning ability of students. Therefore, it is necessary to study the expanded application of flipped learning using media convergence to various nursing subjects.

• Journal of the Korea Convergence Society
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• v.8 no.12
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• pp.407-416
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• 2017

The Purpose of this study was to identify the relationship among incivility, coping, burnout and career identity to clinical practice. The subjects were 199 nursing students from two college in Gwang-ju. A self-report questionnaire was used to collect data on incivility, coping, career identity and burnout. The data was analyzed using descriptive statistics, Pearson correlation coefficient, independent t-test, ANOVA, and Multiple regression by SPSS ver. 23.0. 87.9% of subjects experiences incivility in clinical practice. Incivility was positively correlated with burnout(r=.27, p<.001). but Incivility was nagatively correlated with career identity(r=-.24, p=.001). Career identity was nagatively correlated with burnout(r=-.62, p<.001). The predictors on burnout were incivility, coping and career identity. These variables have total explanatory power of 48.6% on burnout.

• Restorative Dentistry and Endodontics
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• v.41 no.1
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• pp.12-21
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• 2016

Objectives: To evaluate the effects of three acids on the microhardness of set mineral trioxide aggregate (MTA) and root dentin, and cytotoxicity on murine macrophage. Materials and Methods: OrthoMTA (BioMTA) was mixed and packed into the human root dentin blocks of 1.5 mm diameter and 5 mm height. Four groups, each of ten roots, were exposed to 10% citric acid (CA), 5% glycolic acid (GA), 17% ethylenediaminetetraacetic acid (EDTA), and saline for five minutes after setting of the OrthoMTA. Vickers surface microhardness of set MTA and dentin was measured before and after exposure to solutions, and compared between groups using one-way ANOVA with Tukey test. The microhardness value of each group was analyzed using student t test. Acid-treated OrthoMTA and dentin was examined by scanning electron microscope (SEM). Cell viability of tested solutions was assessed using WST-8 assay and murine macrophage. Results: Three test solutions reduced microhardness of dentin. 17% EDTA demonstrated severe dentinal erosion, significantly reduced the dentinal microhardness compared to 10% CA (p = 0.034) or 5% GA (p = 0.006). 10% CA or 5% GA significantly reduced the surface microhardness of set MTA compared to 17% EDTA and saline (p < 0.001). Acid-treated OrthoMTA demonstrated microporous structure with destruction of globular crystal. EDTA exhibited significantly more cellular toxicity than the other acidic solutions at diluted concentrations (0.2, 0.5, 1.0%). Conclusions: Tested acidic solutions reduced microhardness of root dentin. Five minute's application of 10% CA and 5% GA significantly reduced the microhardness of set OrthoMTA with lower cellular cytotoxicity compared to 17% EDTA.

• Imaging Science in Dentistry
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• v.50 no.3
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• pp.227-236
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• 2020

Purpose: Image artifacts caused by patient motion cause problems in cone-beam computed tomography (CBCT) because they lead to distortion of the 3-dimensional reconstruction. This prospective study was performed to quantify patient movement during CBCT acquisition and its influence on image quality. Materials and Methods: In total, 412 patients receiving CBCT imaging were equipped with a wireless head sensor system that detected inertial, gyroscopic, and magnetometric movements with 6 dimensions of freedom. The type and amplitude of movements during CBCT acquisition were evaluated and image quality was rated in 7 different anatomical regions of interest. For continuous variables, significance was calculated using the Student t-test. A linear regression model was applied to identify associations of the type and extent of motion with image quality scores. Kappa statistics were used to assess intra- and inter-rater agreement. Chi-square testing was used to analyze the impact of age and sex on head movement. Results: All CBCT images were acquired in a 10-month period. In 24% of the investigations, movement was recorded (acceleration: >0.10 [m/s²]; angular velocity: >0.018 [°/s]). In all examined regions of interest, head motion during CBCT acquisition resulted in significant impairment of image quality (P<0.001). Movement in the horizontal and vertical axes was most relevant for image quality (R²>0.7). Conclusion: Relevant head motions during CBCT imaging were frequently detected, leading to image quality loss and potentially impairing diagnosis and therapy planning. The presented data illustrate the need for digital correction algorithms and hardware to minimize motion artefacts in CBCT imaging.

• Journal of Convergence for Information Technology
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• v.11 no.10
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• pp.258-269
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• 2021

The purpose of this study was to explore relations between college students' dating violence perception and professional help-seeking attitudes and other factors that affect professional help-seeking attitude and their effect size. 508 students from a college in Chungcheong region responed to self-report questionnaires. Data were analyzed by Partial correlation coefficients and regression analysis using the SPSS 22.0 program. As a resullt, self-disclosure and anticipated utility on self-disclosure had positively effect on professional help-seeking attitudes. In contrast, violence perception, perceived social support, risk on self-disclosure and barriers to seeking help had negative effect on professional help-seeking attitudes. The total effect size was 46.1%, and the effect size of anticipated utility on self-disclosure was the largest, followed by risk on self-disclosure and barriers to seeking help. This study contributed to the broading of dating violence research topics and provided the directions to the endavour to increase the use of professional services among college students

• Journal of Digital Convergence
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• v.15 no.2
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• pp.35-46
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• 2017

According to domestic and foreign research, one of the common characteristics of good teaching is a variety of class activities. To make 'Business Major English' a good class, the researcher used a variety of class activities such as professor explanation, group activities & presentation, vocabulary quizzes, reading comprehension, homework and test feedback. The participants were 39 junior students who took 'Business Major English' in 2015 and 2016. Data on student perception were gathered from questionnaires. The analysis of the data showed, first, that the class activity the students preferred the most was professor explanation. Second, the class activity which was the most helpful in understanding text content and English sentence structures was professor explanation. Third, there were not many students preferring group activities & presentation and the students found group activities & presentation the least helpful in understanding text content and English sentence structures. Given the results, this study implies that for English class activities, students' preferences and the help they perceive have a relation to the characteristics of a class and students' English proficiency.

• Journal of the Korean Society of School Health
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• v.12 no.2
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• pp.339-356
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• 1999

The purpose of this study is to analyze the factors which influence the college student sex behavior. The results can be used as the basis to establish health polices and a health promotion program to reduce the risks of sexual behavior of college students. The study subjects were random selected from college students in Kyonggido. The 335 subjects were selected from 4 schools including three colleges and one university. The self-administered questionnaires were distributed to 350 students, 335 of which were analyzed (after excluding the 15 incomplete or inaccurate data). The study took place between December 7-19, 1998. Regarding the analysis method, the SPSS program was used. The relationship between social and demographic characteristics and relevant factors was identified through Chi-squared test. The major findings of the study were follows: 1. Of the 335 respondents, thirty seven percent of men and ten percent of women had already experienced sexual intercourse. Significantly more males had experienced sexual experience than women. The majority of students, living with both their parents had less sexually experience than that living without their parents. There were religious differences, that students who believed in buddhism had more sexual experience than christian or catholic students. Students who reported drinking alcohol frequently had more sexual experience than those who didn't and it was statistically significant (${\chi}^2=47.6$ df=4 p=0.000). 2. Sexual awareness was relatively low. High level group of sex knowledge were less sexual experience than middle or low level group (${\chi}^2=6.038$ df=2 p=0.049). Women were more sexually aware than men (${\chi}^2=20.814$ df=2 p=0.000). Groups who had sisters and brothers were more sexually aware than those who few sisters and brothers. 3. Sixty one percent of respondents said that chastity before marriage should be kept but twenty four percent of them felt that it was unnecessary. Opponents to chastity before marriage had more sex experience than those for. It was statistically significant (${\chi}^2=48.967$ df=2 p=0.000). Those who agreed with the questionnaire point 'Even if people are not married, if they love each other, they can have sexual intercourse.' had more sexual intercourse than those who didn't agree. Those who agreed with the questionnaire point 'Even though people doesn't like, they can still have sexual intercourse.' had more sexual intercourse than those who disagree. On this point, men were three times higher of the opinion than women. So we can see the difference in the perception between men and women. As a result of this study, sexual awareness influences sexual attitudes and sexual attitudes influence sexual awareness influences sexual activity includes poor knowledge and uninformed attitudes about sex. Therefore sex education is needed and it is very important to reestablish concepts about sex.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.7
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• pp.357-369
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• 2020

This study examined the influential relationship between self-differentiation, interpersonal relationships, and social support of adolescent North Korean defectors as well as the mediating effects of social support in the relationship between self-differentiation and interpersonal relationships. For this study, the participants were selected among student North Korean defectors aged between 9 and 24 years. With these participants, a survey was conducted from November 4 to December 14, 2019. Two hundred eighteen questionnaires were used in the analyses, which were conducted with SPSS 23.0 and AMOS 23.0. The analyses yielded the following findings. The self-differentiation of the adolescent North Korean defectors had a positive impact on interpersonal relationships. The self-differentiation of adolescent North Korean defectors had a positive impact on social support, and the social support of adolescent North Korean defectors had a positive impact on interpersonal relationships. In the relationship between self-differentiation of adolescent North Korean defectors and their interpersonal relationship, social support had a mediating effect. This study showed that by improving the level of social support and self-differentiation of adolescent North Korean defectors, it would be possible to improve their interpersonal relationship issues.