• Polymer(Korea)
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• v.27 no.3
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• pp.210-216
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• 2003

4-Vinyl-1-cyclohexene diepoxide (VCE)/diglycidyl ether of bisphenol-A (DGEBA) epoxy blends with benzylquinoxalinium hexafluoroanti-monate were cured using an electron-beam technique. The effect of DGEBA content to VCE on cure behavior, thermal stabilities, and mechanical properties was investigated. The composition of VCE/DGEBA blend system vaned within 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100 wt%. The cure behavior and thermal stability of the cured specimens was monited by near-infrared spectroscopy and thermogravimetric analysis, respectively. Also, the critical stress intensity factor ($_{4}$) test of the cured specimens was performed to study the mechanical interfacial properties. As a result, the decreases of short side-chain structure and chain scission were observed in NIR measurements as the DGEBA content increases, resulting in varying the hydroxyl and carbonyl groups. And, the initial decomposition temperature (IDT), temperature of maximum weight loss (T$\_$max/), and decomposition activation energy (E$\_$d/) as thermal stability factors were increased with increasing the DGEBA content. These results could be explained by mean of decreasing viscosity, stable aromatic ring structure, and grafted interpenetrating polymer network with increasing of DGEBA content. Also, the maximum $_{4}$ value showed at mixing ratio of 40:60 wt% in this blend system. in this blend system.

• Journal of Gifted/Talented Education
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• v.21 no.3
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• pp.611-630
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• 2011

The purpose of the study was to investigate which psychological factors influence on the gifted students' achievement. As a psychological factor, self-determination, learning goal-orientation, self-efficacy, belief of intelligence, and self-regulated learning strategy were examined. The difference in psychological factors between the gifted with high achievement and the gifted with low achievement was to explored. For the study 128 gifted students' data from second-year data of Korean Education Longitudinal Study (KELS) were selected and analyzed. The findings indicate that the predictors of gifted students' achievement are extrinsic regulation, identified regulation, mastery-approach goal, self-efficacy, elaboration, and meta-cognition factor. Especially, the factor of elaboration and identified regulation are the strongest predictors. The findings from t-test analysis indicate that the gifted with low achievement show the low level in self-determination, mastery-approach, self-efficacy, elaboration, meta-cognition, place management and seeking social assistance from teacher. Therefore the developing elaboration, one of regulation learning strategy, is essential to improve the achievement of the gifted students with low scores.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1234-1243
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• 2011

Our study was carried out to develop the severity-adjustment model for length of stay in hospital for community-acquired pneumonia so that we analysed the factors on the variation in length of stay(LOS). The subjects were 5,353 community-acquired pneumonia inpatients of the Korean National Hospital Discharge In-depth Injury Survey data from 2004 through 2006. The data were analyzed using t-test and ANOVA and the severity-adjustment model was developed using data mining technique. There are differences according to gender, age, type of insurance, type of admission, but there is no difference of whether patients died in hospital. After yielding the standardized value of the difference between crude and expected length of stay, we analysed the variation of length of stay for community-acquired pneumonia. There was variation of LOS in regional differences and insurance type, though there was no variation according whether patients receive their care in their residences. The variation of length of stay controlling the case mix or severity of illness can be explained the factors of provider. This supply factors in LOS variations should be more studied for individual practice style or patient management practices and healthcare resources or environment. We expect that the severity-adjustment model using administrative databases should be more adapted in other diseases in practical.

• The Journal of Korean society of community based occupational therapy
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• v.2 no.1
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• pp.25-35
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• 2012

Objective : This study conducted in rural areas, elderly services voucher business and leisure satisfaction survey based on data from the use of community-dwelling older people considering service needs was to find ways to take advantage of leisure time. Methods : Buyeo county residents in this study 71 patients were elderly, the characteristics of elderly gender, the presence of spouse, health status, education level, monthly living expenses, number of children, occupation, and the variables were included. Subjects' self-esteem, life satisfaction, quality of life, program satisfaction questionnaire for the survey were used, t-test and correlation analysis using the correlation between each factor were analyzed. Results : In a survey of participants in leisure activities, TV watching, meeting friends, such as phone calls to static and time-consuming activities were surveyed about satisfaction of the voucher business, the elderly oral health care services, health screening services, sports massage such as health-related services is relatively high degree of satisfaction. Conclusion : The results of this study of elderly people in rural communities through meaningful leisure time were utilized to determine what is lacking, a strong desire for health-related services that could be confirmed. Therefore, further experience and knowledge about activities by providing opportunities for meaningful leisure time needs to improve, and it based on a variety of programs to meet the needs of the elderly should be provided.

• Journal of the Korean Institute of Landscape Architecture
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• v.39 no.5
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• pp.12-20
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• 2011

Parks and green spaces have various functions for improving urban physical and social environments. Urban parks and green space planning have been applied in this study for the purpose of enhancing the urban environment. The most popular method for urban parks and green space planning is incrementing the quantity of parks and green spaces. However, it may not be possible to designate new parks and green spaces in a large city because of the difficulty of obtaining land. This study explores how urban parks and green space planning produces better quality urban environments without having to designate new parks and green spaces. The study evaluates existing parks and green spaces according to the satisfaction of the users. This evaluation could be a useful tool for those planning urban parks and green space systems. The study was performed in Tama Newtown, Japan, within two districts with two distinct characteristics of park systems: concentration and equality arrangement forms. For comparison, on-site questionnaires were used, with 319 residents in the area responding to the study. The data was collected and analyzed, using t-test, factor analysis, and multiple regression methods. The study found there was no difference in satisfaction factors be tween the two districts. However, differences were found within each of the districts, depending on parks and green space components. For example, the quality of green space was the most important factor for the district with a planned concentration arrangement form of parks and green spaces, but, separation of the pedestrian and vehicular systems was the most important factor in the district with a planned equality arrangement form of park system. Factors affecting the satisfaction of parks and green spaces that were common between the two sites were: accessibility, quality of park, quality of green space, and separation of pedestrian and vehicular traffics.

• Investigative Magnetic Resonance Imaging
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• v.15 no.2
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• pp.110-122
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• 2011

Purpose : The purpose of this study is to establish the method generating human brain anatomical connectivity from Korean children and evaluating the network topological properties using small-world network analysis. Materials and Methods : Using diffusion tensor images (DTI) and parcellation maps of structural MRIs acquired from twelve healthy Korean children, we generated a brain structural connectivity matrix for individual. We applied one sample t-test to the connectivity maps to derive a representative anatomical connectivity for the group. By spatially normalizing the white matter bundles of participants into a template standard space, we obtained the anatomical brain network model. Network properties including clustering coefficient, characteristic path length, and global/local efficiency were also calculated. Results : We found that the structural connectivity of Korean children group preserves the small-world properties. The anatomical connectivity map obtained in this study showed that children group had higher intra-hemispheric connectivity than inter-hemispheric connectivity. We also observed that the neural connectivity of the group is high between brain stem and motorsensory areas. Conclusion : We suggested a method to examine the anatomical brain network of Korean children group. The proposed method can be used to evaluate the efficiency of anatomical brain networks in people with disease.

• The Journal of the Korea Contents Association
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• v.20 no.8
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• pp.572-582
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• 2020

The purpose of this study was to investigate workplace bullying, job stress, organizational commitment, and turnover intention as well as determine influencing factors on the turnover intention of small and medium-sized hospital nurses. Participants included 140 nurses from six small and medium-sized hospitals with less than 300 beds in G-city and J-province. Data were analyzed using descriptive statistics, independent t-test, one-way analysis of variance, Pearson's correlation coefficient, and stepwise multiple regression, using the SPSS Win 21.0 program. The regression model was statistically significant (F=37.11, p<.001), and the explanatory power for turnover intention was 34.2%. The significant factors influencing turnover intention were organizational commitment (β=-.41, p<.001 and job stress (β=.25, p=.005). Human resources management is crucial for providing high quality healthcare service. The results of this study indicated that it is important to lower job stress and increase organizational commitment in order to reduce turnover intention among nurses of small and medium-sized hospitals. Based on these findings, customized programs for nurses in small and medium-sized hospitals need to be developed and implemented so as to lower their turnover intention and promote efficient management of healthcare human resources.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.8
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• pp.303-311
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• 2018

This study was conducted to investigate the effects of oral health awareness and oral health behavior on cardiocerebrovascular prevention behavior in a cardiocerebrovascular diseases risk group and provide basic data for a nursing intervention program for the group. Data were collected from 131 people in the risk group of cardiocerebrovascular diseases living in J Province in February and March of 2018. The obtained data were analyzed using descriptive statistics, t-tests, Pearson's correlation, and stepwise multiple regression analysis. The results revealed that preventive acts were positively correlated with subjective oral health state (r=0.261, p=0.003), importance of oral health (r=0.250, p=0.004), and practice of oral health (r=0.303, p<0.001). Moreover, acts to prevent cardiocerebrovascular disease were influenced by oral health (${\beta}=0.29$, p<0.001), age (${\beta}=0.27$, p=0.001), and subjective oral health state (${\beta}=0.24$, p=0.003). Specifically, scores of preventive acts for cardiocerebrovascular diseases increased with higher degree of oral health behavior, older age, and better subjective oral health state. These variables had an explanatory power of 19.3%. The results of this study imply a need to prepare measures to enhance the oral health level of the risk group of cardiocerebrovascular diseases and conduct ongoing follow-up studies of the perception, attitude, and behavior of individuals toward oral health, as well as the state of oral health.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.7
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• pp.244-254
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• 2020

The purpose of this study was to analyze the differences in dating violence perception of dating violence perception of university students. As a research tool, CTS2 was used as a measure of dating violence, a measure developed by Kim(1999) was used, and a measure of dating violence by Jeong(2013) was used. Data analysis was performed using independent sample t-test and multi-variate analyses. The results are summarized as follows. First, female students showed higher differences in total violence against violence and psychological violence than boys, while boys showed higher physical violence than girls. Health majors were significantly higher in total dating violence and psychological violence than students in humanities and social sciences. There was no significant difference in dating violence offenses with or without sexual experience. Only psychological violence showed an interaction effect between gender and sex experience. Second, female students were significantly higher than male students with significant differences in recognition and sub-factors. Health majors were significantly higher in both date violence perception and lower factors than humanities and social sciences. Students without sexual experience perceived overall dating violence more than students with sexual, physical and cyber violence being significantly higher.

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.800-806
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• 2011

The objective of this study was to identify the effect of lumbar lordotic curve adjustment on head and neck posture in older adults. Methods Twenty healthy older participants (mean age 71.32) were photographed while watching monitor in sitting with or without lumbar roll support(length 28cm, diameter 10cm). The upper cervical angle and lower cervical angle were measured using the NIH ImageJ 1.32. Comparisons between upper and lower cervical angle with or without lumbar roll support were made using paired-t test analysis. Results Subjects demonstrated a significant difference in the mean upper and lower cervical angle. Mean difference of the upper cervical angle was about $2.83^{\circ}$ with and without lumbar roll support(p<0.005). Mean difference of the lower cervical angle was about $4.44^{\circ}$ with and without lumbar roll support(p<0.0001). Conclusions This study showed that healthy older adults demonstrated more ability to maintain an upright posture of cervical spine during lumbar lordotic curve maintenance with lumbar roll support than without lumbar roll support. When the clinicians consider improvement of the head and neck posture in older adults, they must incorporate adjustment in the lumbar region.