• Journal of Adhesion and Interface
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• v.24 no.1
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• pp.17-25
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• 2023

In this study, waste polyethylene terephthalate (PET) was recycled to produce a support and then polyetherimide (PEI) was used for environmentally friendly organic solvent nanofiltration. The prepared composite membrane was first prepared by electrospinning a PET support, then casted on the support using PEI having excellent solvent resistance, and organic solvent nanoparticles using a Non-solvent Induced Phase Separation (NIPS) method. A filtration membrane was prepared. First, the fiber diameter and tensile strength of the PET scaffold prepared prior to membrane fabrication were identified through morphology analysis, and the optimal scaffold for the organic solvent nanofiltration membrane was identified. Afterward, the PET/PEI composite membrane prepared was checked for the DEA removal rate of Congo red having a molecular weight of 697 g/mol in ethanol to understand the performance as an organic solvent nanofiltration membrane according to the concentration of PEI. Finally, the removal rate of Congo red was 90% or more.

• The Journal of Korean Academy of Prosthodontics
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• v.53 no.1
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• pp.1-8
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• 2015

Purpose: The purpose of this prospective study was to compare the satisfaction levels of the patients worn implant supported mandibular overdentures and conventional complete dentures. Materials and methods: Full edentulous patients (n=40) who were planned to do implant supported mandibular overdentures, aged 51 to 82 years, were enrolled in this study. All subjects rated their satisfaction levels (mastication, pronunciation, esthetics, pain, and general satisfaction) of their original conventional dentures prior to treatment and their new overdentures 1 week and 12 weeks after the delivery on 10 cm visual analogue scales. Repeated-measures ANOVA was performed to compare the satisfaction level of each three period (P<.05). Results: The mean satisfaction levels of the implant supported overdentures after 1 week and 12 weeks of delivery were significantly higher than those of the conventional complete dentures in all scoring parameters (P<.05). After 12 weeks of overdenture delivery, the increase of the satisfaction levels in mastication, pronunciation, and pain and the decrease in esthetics and general satisfaction were observed in comparison with those after 1 week of delivery, however, no significant difference was found between the satisfaction levels of 1 week and 12 weeks after delivery. Conclusion: An implant supported overdenture might be one of the effective ways to give more satisfaction to patients who were not gratified with a conventional denture and eventually to improve their quality of life.

• 한국노년학
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• v.37 no.3
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• pp.747-762
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• 2017

Recently, as the number of patients with dementia using nursing homes increases, the interest about the quality of care services is increasing. Job satisfaction of caregivers is very important factor in the quality of care service. In addition, as perception of human rights is heightened, human rights behavior in nursing homes is also recognized as an important factor. The purpose of this study is to investigate the structural relationship between job satisfaction and human rights behavior, job stress, and social support of dementia workers who have significant influence on quality of care service. For this purpose, 210 questionnaires were collected from 300 dementia workers working in the elderly nursing home, day night care center, and domiciliary visit care center in Gyeonggi province. After excluding 13 questionnaires, the questionnaires were analysed by AMOS and SPSS 21.0. The results of the analysis are following. It was found that job stress significantly affects the social support directly (-.276). Also, social support significantly affects job satisfaction (.315). On the other hand, human rights advocacy has a direct effect on job satisfaction (.175) and an indirect effect (.102), showed a total effect of (.277). This shows that social support partially mediates human rights advocacy and job satisfaction. Job stress had a direct effect on job satisfaction(-.217) and an indirect effect(-.095), indicating a total effect of (-.312), and social support partially mediated job stress and job satisfaction Could know. The results of this study suggest that in order to improve the job satisfaction of the dementia workers, it is necessary to increase the human rights advocacy behavior and reduce the job stress in an environment that recognizes the social support.

• 한국노년학
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• v.37 no.3
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• pp.527-547
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• 2017

The purpose of this study is to investigate how depression, death anxiety, and social support can exert influence on the psychological well-being of elderly living alone through a parameter of resilience. A survey was conducted involving 988 elderly over the age of 65 living alone in the Daejeon metropolitan area and Chungcheongnam-do and the data were analyzed using structure equation model. The results were as follows. First, in the measurement of variables according to demographic characteristics, depression showed significant differences depending on gender, level of education, health, and financial condition, while death anxiety differed depending on gender, and level of education. Social support was significantly different by gender, age, level of education, region, health, and financial condition. The level of resilience was significantly different by gender, age, level of education, health, and financial condition. Psychological well-being varied according to gender, level of education, health, and financial condition. Second, the effects of depression, death anxiety and social support on psychological well-being were examined. It was found that depression had a negative influence and social support had a positive impact while death anxiety showed no influence. Third, with regard to the effects of depression, death anxiety, social support on resilience, depression was found having negative influence, whereas social support having positive influence. Forth, psychological well-being was positively affected by resilience. Also, through the mediated pathway of resilience, their psychological well-being seemed to totally improve when the negative factors were reduced and the positive ones promoted. This study may have some significance in reference to examine the factors affecting the psychological well-being of elderly living alone and to develop social welfare service programs and policies in the field.

• Korean Journal of Child Education & Care
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• v.18 no.4
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• pp.175-185
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• 2018

Objective: The purpose of this study is to investigate the influence of teachers' demographic and sociological characteristics and the emotional support of the director and co-worker on the childcare efficacy of infant teachers. Methods: In this study, 169 Infant teachers of childcare centers have participated, where are located in Seoul and Gyeonggi-do Areas. The data was analyzed by using t-test and one way ANOVA to confirm the differences among groups, and also correlations analysis and multiple regression analysis were performed to analyze the interrelationship between variables and their effects. Results: Study outcome according to study subjects is as follows. First, we found a statistically meaningful difference in marital status and career by the differences of childcare efficacy depending on demographic and sociological characteristics of infant teachers. Second, childcare efficacy of infant teachers showed the most evident correlationship with co-workers support followed by the director's support. Third, the data also revealed that childcare efficacy of infant teachers was influenced by co-workers' support, their careers, marital status and their directors' support in order. Conclusion/Implications: In conclusion, higher levels of childcare efficacy were shown by the experienced and married early childhood teachers and the emotional support of co-workers has the greatest influence on their childcare efficacy.

• Korean Journal of Child Education & Care
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• v.19 no.1
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• pp.59-73
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• 2019

Objective: The purpose of this study was to investigate the moderating effect of mothers' play support beliefs on the relation between mothers' insecure attachment and children's playfulness. Methods: The research participants of this study include 254 children aged 3 to 5, who attended kindergartens and day care centers located in Seoul, Gyeonggi and Chung-cheong, and their 254 mothers. For data analyses, descriptive statistics, Pearson's correlation and hierarchical multiple regression were conducted using SPSS 23.0 program. Results: First, there was negative association between mothers' insecure attachment and play support beliefs. Social spontaneity and expression of joy were negatively related to mothers' insecure attachment. However, mothers' play support beliefs showed positive associations with children's playfulness, particularly including children's physical spontaneity and expression of joy. In addition, mothers' play support beliefs moderated the relation between mothers' insecure attachment and children's expression of joy. However, the beliefs did not moderate the relation between mothers' insecure attachment and other playfulness traits. Conclusion/Implications: The findings of the present study indicate that mothers' understanding of the importance of play may buffer the adverse effect of mothers' insecure attachment on children's capabilities of expressing their sense of pleasure.

• Korean Journal of Play Therapy
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• v.21 no.4
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• pp.473-489
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• 2018

The aim of this study is to examine the mediating effects of the social support and ego-resilience of adolescent counselors on the relationship between their job stress and burnout. The subjects of this research exercise comprised 250 adolescent counselors. Data were analyzed by means of Pearson's correlation and by structural equation modeling. The results were as follows. First, there was a positive correlation between job stress and burnout, and job stress had a negative correlation with social support and ego-resilience of the adolescent counselors. Moreover, social support and ego-resilience had a negative correlation with burnout. Second, social support did not have any direct impact on relieving burnout yet affected it in an indirect way through ego-resilience. Ego-resilience exerted both direct and indirect influence on reducing burnout. Therefore, it was found that the ego-resilience of the adolescent counselors was bound up with their job stress and there by exercised a significant influence on burnout. The findings of the study illustrated that as for the relationships among the job stress, social support, ego-resilience and burnout of the adolescent counselors, ego-resilience was a crucial variable in preventing burnout. This study is of significance in that it provided theoretical data which can be used when developing programs designed to prevent burnout in adolescent counselors.

• Journal of the Korean Institute of Landscape Architecture
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• v.51 no.5
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• pp.1-12
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• 2023

This study evaluated the overturning stability of portable tripod ladders used for high-altitude work such as tree management and pruning work in landscaping construction and management. Portable tripod ladders, which are included in general mobile or portable ladders frequently used in industrial sites, are supported in a triangular support structure, not a 4-point support like common A-type Ladders. In addition, since the working height is more than twice that of a mobile or portable ladder, the possibility of an overturning accident that threatens the safety of workers with a fall accident is high. Therefore, based on the overturning stability test specified in ANSI-ASC A14.7 and EN 131-Part 7, which are related standards for about 130 types of portable tripod ladders sold and used in Korea. An equation to calculate each moment according to working height was derived. Then, each calculated moment was compared to evaluate the safety factor for overturning and stability. As a result of the overturning stability evaluation according to each standard, when the provisions of EN 131-Part 7 were applied, portable tripod ladders with 8 steps in the rear direction and 6 steps or more in the side direction were evaluated as unstable against overturning, but according to ANSI-ASC A14.7 regulations. It was evaluated that the stability against overturning was secured in all directions and number of steps.

• Journal of the Korean Institute of Landscape Architecture
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• v.52 no.3
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• pp.76-88
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• 2024

A significant cause of fall or overturning accidents in the construction industry, including landscaping construction and management, is work at heights using portable ladders. Portable ladders are classified as A-type or triangular support ladders depending on the number of supporting leg and support conditions. The tripod mobile ladder, which supports itself with only three supporting legs, is unstable and more prone to overturning compared to the A type ladders. Therefore, using the specifications of the tripod mobile ladder and the stability regulations of EN131-Part 7, overturning and resistance moment calculation formulas were derived for all directions in which overturning could occur. The moments calculated using these equations, and the overturning stability in each direction were evaluated. According to the calculation results, although there are differences depending on the direction, most are unstable for overturning at 8 or more steps. Based on these results, this study proposed measures to increase the moment of resistance by changing the weight, depth, and width, and using outriggers to ensure stability against the overturning of ladder. However, when changing the specifications of these measures, the size increases are excessive and the applicability is insufficient. On the other hand, outriggers are an applicable measure as they can ensure stability against overturning with only a minimum expansion length.

• 한국노년학
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• v.38 no.3
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• pp.645-666
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• 2018

The purpose of this study is to investigate the characteristics of the elderly with disability focused on comparison between aging with disability and disability with aging in Korea. Disability in older age has been related to several psychosocial characteristics, including social support, self-esteem, life satisfaction and depression. However, the exact role of these characteristics in the disablement process remains uncertain and this study focused on comparison between aging with disability and disability with aging in Korea. This study analyzed the 12th wave (2017) KWPS(Korean Welfare Panel Study)and Disability Study which included 692 elderly with disability aged 65 and over. The data were processed by SEM and multi-group SEM analysis. The findings were as follows; First, family support and the significant others support showed direct effects on the life satisfaction of the elderly with disability. Second, family support and the significant others support reduced the level of depression and enhanced self-esteem and finally impact on the life satisfaction of the elderly with disability. The formal support enhanced the depression and reduced self-esteem and eventually reduced the life satisfaction. Third, the disability with aging group showed more higher perception and more experience of formal support and formal service and more higher depression than the aging with disability group. Forth, the significant others support on life satisfaction only showed significance in disability with aging group and depression had significance in disability with aging group. Finally, aging with disability group showed positive effects on the formal support of life satisfaction but showed negative effects on the depression and self-esteem. Based on these findings, practical implications of future directions for research are discussed.