• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.33 no.6
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• pp.495-499
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• 2020

Power factor improvement at high temperatures has been a major research topic for the development of skutterudite thermoelectric materials. Here, we attempted to optimize the process parameters for manufacturing skutterudite materials, especially for p-type systems. We focused on the effect of aging time variation to maximize the high-temperature performance of the Ce-filled Fe³CoSb¹² skutterudite system. The optimized aging time was concluded to be a key parameter for the formation of single-phase nanostructures in this p-type skutterudite system. The optimized condition was effective in reducing the bipolar effect at high temperature ranges by increasing the carrier concentration in the p-type system. To confirm the conclusions, the electrical conductivity, Seebeck coefficient, and power factor were measured. The results matched well with the microstructure and with those of an XRD analysis performed for the system.

• Korean Journal of Adult Nursing
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• v.27 no.5
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• pp.594-603
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• 2015

Purpose: The purpose of this study was to examine the effects of health promotion program on healthy aging preparation for late middle aged women. Methods: The research design was a non-equivalent control group quasi-experimental study. Participants were recruited from K and Y cities in Gyeong-nam Province from October, 2013 to January, 2014. They were 26 for the experimental group and 31 for the control group. The experimental group participated in a health promotion program for healthy aging preparation. The program consisted of education, exercise, and small group discussion over 8 weeks. Data were analyzed by Chi-square, t-test and ANCOVA, using the PASW 18.0 program. Results: There were significant improvements in aging anxiety and general self-efficacy, health promoting behaviors in the experimental group compared to those of the control group. However, there was no significant differences in attitude toward older adults between the two groups. Conclusion: The health promotion program on healthy aging preparation for late middle aged women was found to be effective in enhancing aging anxiety and self-efficacy, and health promoting behavior. Thus, the developed program is recommended for use in clinical practice as an effective nursing intervention for late middle aged women in order to keep up with their health in later life.

• Journal of Korean Academy of Nursing
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• v.43 no.2
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• pp.176-184
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• 2013

Purpose: The purpose of this study was to investigate expectations regarding aging by middle-aged women in the community, and identify factors contributing to their expectations about aging. Methods: Participants in the survey for this study were 303 middle-aged women from community health centers and religious facilities in Seoul, Gyeonggi Province, and Chungcheongbuk Province. Data were collected from March 2 to April 17, 2012 using self-report structured questionnaires. The instruments were the Health Perceptions, Rosenberg Self-esteem Scale (RSES), Family APGAR, Expectations Regarding Aging (ERA-12). The data were analyzed using t-test, one-way ANOVA, Scheffe test, Pearson correlation coefficients and hierarchical multiple regression with IBM SPSS/WIN 20.0 program. Results: Perceived health status (${\beta}$=0.16, p=.009) and self-esteem (${\beta}$=0.20, p=.001) of middle-aged women were identified as significant predictors of expectations regarding aging, after adjusting for age, education, occupation, monthly income and menstrual status. Conclusion: These results suggest that nurses should make an effort to improve expectations about aging among middle-aged women. Ultimately, community health programs for middle aged women need to be developed to achieve successful aging.

• 한국노년학
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• v.38 no.2
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• pp.309-327
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• 2018

Meta-analysis was conducted on 34 studies reported in Korea from February 2007 through March 2017 to systematically integrate factors of aging anxiety of the middle and old aged. The variables related to aging anxiety were divided into 6 groups of variable, and the effect sizes were computed for each variable of their groups. The results are as follows. First, the total effect size showed the middle effect size, and the effect size according to the variable group showed the largest effect size for the negative psychological variable group, followed by the positive psychological variable, the social variable, the physical variable, the familial variable and the demographic variable. Second, the largest effect size of the sub-variables showed psychological well-being and death anxiety. As described above, suggesting that these variables may have a strong influence on aging anxiety among the variables related to aging anxiety because the psychological well-being and death anxiety were shown as the largest effective variables related to aging anxiety.

• Journal of Korean Academy of Nursing
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• v.38 no.6
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• pp.831-842
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• 2008

Purpose: The purpose of this study was to develop a web-based senescence preparation education program to promote successful aging. Methods: This program was developed based on Network-Based Instructional System Design (NBISD) model, using the following 5 processes: analysis, design, development, implementation, and evaluation. The program was operated for 10 weeks from March 17 to May 25, 2008. Results: There were 4 menu bars, introduction, related data, lecture room, and communication on the main page. In the operation of this program, HTML, ASP, JAVA Script, Namo web editor, Edit Plus, Front Page and multimedia technology were applied. The program content consisted of understanding elderly people, physical health, activity & exercise, nutrition, medication use, psychological health, intellectual health, understanding death, welfare system and leisure activity. Conclusion: This program could be a useful means to provide senescence preparation information to middle-aged adults. Also, it is expected to offer individualized learning opportunities to many learners in various settings. Nurses should further develop and facilitate various learning strategies including web-based programs for elder care.

• Journal of The Korea Institute of Healthcare Architecture
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• v.16 no.1
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• pp.55-63
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• 2010

The study was initially designed to look into the soon-to-be senior citizens' preferences for the life after retirement in aging society. Its outcomes are to be contributed to grading up the quality of housing culture through examining the expected changes of housing types in the future. The increasing number of the soon-to-be senior citizens becomes leading subjects in information, culture and consumption areas. Therefore it is significant to present a model of housing types for those citizens by analyzing their preferred residence after retirement. To complete those objectives, a set of questionnaires concerning sex, age, district, education and income of those subjects in 40's-50's, who are expected to be more than 20 percent of national population by 2030, were collected and analyzed to find out their preferences over housing types, residential welfare facilities, and co-housing. The results show that the preferences over the residential welfare facilities and co-housing for those who are able to move for themselves are low, while the preferences over single-unit houses in the suburbs within 2 hours from a city are very high. Preferences for apartments in the urban areas are high for those with high income and education. In contrast preferences for life in their hometowns are high for those whose income and education are relatively low. Most of those with some difficulties in moving for themselves want to get help with welfare facilities for the elderly people. And the preferences of those who want to receive help from assistants are different from those preferring to get help from their offsprings, which tells a need for further study of the convertible housing types according to their family members.

• Journal of Digital Convergence
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• v.19 no.5
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• pp.321-331
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• 2021

The purpose of this study is to establish well-dying education, well-dying culture, and industrialization for well-aging. For this, data was collected through Gallup Korea from February 1, 2021 to February 22, 2021. As a result of the study, well-dying education experience was 4.7%, and education satisfaction was surveyed with 2.88 points out of 5. As a result of analyzing the needs of well-dying education according to the age groups, the educational demands of youth and middle-aged were in the order of hospice education and information, life-sustaining medical information, and funeral information. In the case of the young old, it was in the order of hospice education and information, funeral information, and psychological overcoming related to death. In the case of the elderly, the survey was conducted in the order of hospice education and information, funeral information, and life-care related information. The perception of industrialization related to the well-dying culture was inspected in the order of the well-dying café where you can talk about life and death, the well-dying experience such as the entrance experience, and the development of travel products related to culture and art (p<0.05). Such results can be usefully utilized in the development of well-dying education programs for well aging, cultural spreading, and industrialization.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.4
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• pp.924-937
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• 2015

The purpose of this study was to identify the effect of resistance training intensity levels on muscle damaged index and aging-related hormones in obese middle-aged women. Thirty middle-aged women having over 30% of body fat participated in this study. The subjects were assigned into 3 groups on the basis of workout intensity, 50% intensity, 60% intensity, and 70% intensity. After performing three different types of exercise for 12 weeks, the levels of creatine kinase (CK), lactate dehydrogenase (LDH), melatonin, dehydroepiandrosterone-sulphate (DHEA-S), and growth hormone (GH) in all subjects were assessed before and after the program. Muscle damaged index was effectively changed in low exercise intensity group. However, aging-related hormones were effectively changed in high exercise intensity group. DHEA-S and GH were significantly increased in the 70% intensity group than the other groups.

• Journal of Korea Entertainment Industry Association
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• v.13 no.2
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• pp.169-176
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• 2019

The purpose of this study was to investigate attitudes toward aging and depression among elderly welfare facility users. For this purpose, a questionnaire-based survey was conducted with 280 elderly participants in the facilities of 15 institutions in Gyeonggi-do. In total, 258 data points were used for analysis. The measuring instruments used an attitude scale and depression scale for aging. The results of this study are as follows. First, there was no difference in attitude toward aging and depression among elderly welfare institution users by gender. Second, attitudes toward aging among elderly welfare facility users were also assessed according to final educational background. Positive attitudes in general (lack of depression) and positive attitudes toward aging were found to be higher with a higher rate of final academic completion. Third, attitudes toward aging were assessed according to experience with welfare facilities among the elderly, and it was found that depression has a significant impact on perceptions of physical change caused by aging. As a result, even when attitudes toward aging are generally negative, an elderly person cannot be judged to be depressed because this is highly related to final academic completion. Therapists working in welfare facilities for the elderly are more likely to have negative attitudes toward aging and depression when the number of facilities used is lower.

• Journal of Ginseng Research
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• v.44 no.2
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• pp.222-228
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• 2020

Background: 20(S)-ginsenoside-Rg3 (C₄₂H₇₂O₁₃), a natural triterpenoid saponin, is extracted from red ginseng. The increasing use of 20(S)-ginsenoside Rg3 has raised product safety concerns. Methods: In acute toxicity, 20(S)-ginsenoside Rg3 was singly and orally administrated to Kunming mice and Sprague-Dawley (SD) rats at the maximum doses of 1600 mg/kg and 800 mg/kg, respectively. In the 26-week toxicity study, we used repeated oral administration of 20(S)-ginsenoside Rg3 in SD rats over 26 weeks at doses of 0, 20, 60, or 180 mg/kg. Moreover, a 4-week recovery period was scheduled to observe the persistence, delayed occurrence, and reversibility of toxic effects. Results: The result of acute toxicity shows that oral administration of 20(S)-ginsenoside Rg3 to mice and rats did not induce mortality or toxicity up to 1600 and 800 mg/kg, respectively. During a 26-week administration period and a 4-week withdrawal period (recovery period), there were no significant differences in clinical signs, body weight, food consumption, urinalysis parameters, biochemical and hematological values, or histopathological findings. Conclusion: The mean oral lethal dose (LD₅₀) of 20(S)-ginsenoside Rg3, in acute toxicity, is above 1600 mg/kg and 800 mg/kg in mice and rats, respectively. In a repeated-dose 26-week oral toxicity study, the no-observed-adverse-effect level for female and male SD rats was 180 mg/kg.