• Title, Summary, Keyword: Aging

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In the Relationship between Social Activities and Successful Aging Mediating Effect of Aging Anxiety and Moderating Effect of Social Support (사회활동과 성공적 노화의 관계에서 노화불안의 매개효과와 사회적지지의 조절효과)

  • Seo, Dae-Seok
    • The Journal of the Korea Contents Association
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    • v.18 no.10
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    • pp.575-583
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    • 2018
  • The purpose of this study is to examine Mediating effects of aging anxiety on the relationship between social activities and successful aging and Moderating effects of social support in relation to aging anxiety and successful aging. A total of 513 respondents participated in the questionnaire, 450 of which were used for the analysis. The analysis used mediating effect and regulatory effect test using regression analysis. The results showed that social activities lowered aging anxiety and helped to improve successful aging. Aging anxiety showed a mediating effect on the relationship between social activity and successful aging and confirmed the moderating effect of social support on the relationship between aging anxiety and successful aging. On the basis of this, the social activity providers diversify the social activity programs, reorganize the business system so that aging anxiety can be mitigated, and establish a mutual support system among the participants, so that successful aging through social activities will be more effective It is necessary to be managed so that.

Effects of Dry- and Wet-ageing on Flavor Compounds and Eating Quality of Low Fat Hanwoo Beef Muscles

  • Ha, Yoonkyung;Hwang, Inho;Van Ba, Hoa;Ryu, Sangdon;Kim, Younghoon;Kang, Sun Moon;Kim, Jinhyoung;Kim, Yunseok;Cho, Soohyun
    • Food Science of Animal Resources
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    • v.39 no.4
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    • pp.655-667
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    • 2019
  • The present study aimed at investigating the effects of dry- and wet-aging methods on flavor compounds and sensory properties of low fat Hanwoo beef muscles. All the beef samples were obtained from 2-grade carcasses of Hanwoo cows. The beef samples used in the dry- and wet-aging methods were prepared in the forms of quarter beef (bone-in) and cuts (boneless), respectively. The dry-aging was carried out at $2^{\circ}C-4^{\circ}C$ and humidity of 65%-85%, while the wet-aging was done at $1^{\circ}C$ for 0, 20, 40, and 60 d. At each aging time, three muscles: longissmus thoracis (LT), glutaeusmedus (GM) and semimembranosus (SM) were taken from the corresponding quarters and cuts, and used for the flavor compounds and sensory analyses. Results showed that both aging methods significantly increased the concentrations of flavor compounds and total amount of all classes of the flavor compounds as the aging time increased (p<0.05). In the dry-aging method, the GM and SM muscles presented significantly higher total amounts of pyrazines and sulfur-containing compounds compared to the LT muscle (p<0.05). Both the aging methods improved the eating quality attributes, indicating by increased scores of sensorial attributes with increased aging time for all the muscles studied (p<0.05). However, compared to the wet-aging, the dry-aging method resulted in significantly higher scores of tenderness and flavor for the GM and SM muscles after 40 to 60 d. Thus, postmortem aging, especially the dry-aging method could be used to improve eating quality attributes (tenderness and flavor) of low fat beef muscles such as GM and SM.

A Study on the Dynamics of the Local Government Finance in Accordance with the Aging Population (고령화에 따른 지방재정의 동태성 분석)

  • Choi, Nam-Hee
    • Korean System Dynamics Review
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    • v.13 no.4
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    • pp.5-31
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    • 2012
  • This paper aims at investigating the dynamics between aging population and local finance. In recent years, the aging rate has been accelerating the pace. The trend implies that Korea is moving towards the aging society, presumably, with unprecedented speed in the world. Aging society's biggest problems are centered around the explosive growth of the financial needs. In particular, these problems are apt to appear more seriously in local governments, as most of them are confronted with high level of aging population and poor financial bases. Firstly, it analyzes how the population structure in the local government impacts local finance, income and expenditure. Based upon in-depth literature reviews, this study examines variables related to aging population and local fiance. Secondly, it focuses on a series of positive and negative feedback loops which would reveal the essence of the mutual interaction structure between aging population and local governments' fiscal behaviors.

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Analyses on Electrical-Mechanical Characteristics of Environment-friendly Transformer Insulating Material by Accelerated Thermal Aging (가속 열 열화에 따른 환경친화형 변압기 절연물의 전기적-기계적 특성 분석)

  • Shim, Myeong-Seop;An, Jung-Sik;Choi, Sun-Ho;Jeong, Jung-Il;Lee, Tae-Ho;Huh, Chang-Su
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.10
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    • pp.1832-1838
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    • 2010
  • Aging of transformer insulating material in natural ester insulating oil is compared to that in conventional transformer oil. Aging of insulating paper and insulating oil have been studied by performing accelerated thermal aging test. Sealed aging test vessels containing cooper, laminated core, Kraft paper and insulating oil(natural oil or mineral oil) were aged at $140^{\circ}C$ for 500, 1000, 1500 and 2000 hours. Insulating oils after aging are investigated with total acid number, breakdown voltage and viscosity. Also, degradation of insulating paper after aging is determined using breakdown voltage and mechanical strength. Accelerated aging studies demonstrate a slower aging rate for natural ester insulating oil compared to the rate for conventional mineral oil.

Analysis on Spatial Pattern Changes of Aging Phenomenon and Relation between Aging Population and Regional Characteristics (고령화 현상의 공간적 패턴 변화와 지역특성과의 관계 분석)

  • Lee, Jimin
    • Journal of Korean Society of Rural Planning
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    • v.22 no.4
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    • pp.139-146
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    • 2016
  • Aging phenomenon is an important issue in Korea national policy. This aging phenomenon depends on the social and environmental characteristics of regions. Also aging phenomenon and regional characteristics have spatial dependency. The purpose of this study is to discover the spatial changes in aging population rate and to find local factors of regional aging phenomenon considering spatial autocorrelation. For spatial analysis of ageing phenomenon, local Moran's I and Geographically Weighted Regression (GWR) were applied. As the results, the most significant changes of aging phenomenon appeared between 2000 and 2005, and most of hot-spot regions (aged regions) were distributed in Jullanam-do and Jullabuk-do. The results of GWR (R-square: 0.681) shows that total fertility rate, the number of doctor per 1,000 people and forest area rate have positive relation with aging population rate, but the number of private academy per 1,000 people has negative relation.

Non-Coding RNAs in Caenorhabditis elegans Aging

  • Kim, Sieun S.;Lee, Seung-Jae V.
    • Molecules and Cells
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    • v.42 no.5
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    • pp.379-385
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    • 2019
  • Non-coding RNAs (ncRNAs) comprise various RNA species, including small ncRNAs and long ncRNAs (lncRNAs). ncRNAs regulate various cellular processes, including transcription and translation of target messenger RNAs. Recent studies also indicate that ncRNAs affect organismal aging and conversely aging influences ncRNA levels. In this review, we discuss our current understanding of the roles of ncRNAs in aging and longevity, focusing on recent advances using the roundworm Caenorhabditis elegans. Expression of various ncRNAs, including microRNA (miRNA), tRNA-derived small RNA (tsRNA), ribosomal RNA (rRNA), PIWI-interacting RNA (piRNA), circular RNA (circRNA), and lncRNA, is altered during aging in C. elegans. Genetic modulation of specific ncRNAs affects longevity and aging rates by modulating established aging-regulating protein factors. Because many aging-regulating mechanisms in C. elegans are evolutionarily conserved, these studies will provide key information regarding how ncRNAs modulate aging and lifespan in complex organisms, including mammals.

The Effects of Emotional Happiness on Aging Preparation

  • Jung, Hae-ok;Kim, Jung-ae
    • International Journal of Advanced Culture Technology
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    • v.6 no.3
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    • pp.59-68
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    • 2018
  • This study was a cross-sectional descriptive study of the effects of emotional happiness on aging preparation for 45-60 year olds. Participants of this study were 312 volunteers and data was collected online, the collection period was from May 15, 2018 to May 31, 2018. The tools used in the research were the emotional happiness developed by Watson et al (1988) et al., the aging preparation developed by JH Lee (2009). Analysis was done using t-test, ANOVA, Pearson correlation, and regression by SPSS 18.0. As a result of the analysis, 84.0% of participants felt physically healthy and 89.8% felt mental health. The spouses of participants were physically 83.4% healthy and mentally 82.7% healthy. The correlation between emotional happiness, health cognition and aging preparation showed that physical health had a correlation with mental health (r = .482, p <0.01) and emotional happiness (r = .369, p <0.01), economic aging preparation (r = .411, p <0.01), social aging preparation (r = .119, p <0.01). Mental health was correlated with emotional happiness (r = .491, p <0.01), economic aging preparation (r = .411, p <0.01) and social aging preparation. Difference between emotional happiness and retirement preparation according to presence or absence of disease, emotional happiness (t = -4.503, p <0.01) and economic aging preparation (t = -4.960, p <0.01) were statistically significant. Emotional happiness affects the preparation of old age, emotional happiness affects to physical aging preparation under statistical significance (F=25.191, p<0.01), economic aging preparation (F=1131.783, p<0.01), and social aging preparation (F=147.672, p<0.01) which were sub components of aging preparation. Emotional happiness showed a 7.5% effect on the preparation of physical aging, 78.4% on economic aging preparation and 32.3% on social aging preparation. Based on the above results, it can be concluded that physical health and mental health are related to emotional happiness, economic aging preparation, and social aging preparation. And also these results can be inferred that the illness causes emotional less feeling of happiness and economic difficulty. Based on the results of this study, emotional well - being influences the retirement preparation significantly at statistical significance. Therefore, if the concept of emotional happiness is introduced to the old-age preparation program, it will be more client centered program.

Particle-size-dependent aging time scale of atmospheric black carbon (입자 크기의 함수로 나타낸 대기 중 블랙카본의 변성시간척도)

  • Park, Sung Hoon
    • Particle and aerosol research
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    • v.5 no.2
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    • pp.45-52
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    • 2009
  • Black carbon, which is a by-product of combustion of fossil fuel and biomass burning, is the component that imposes the largest uncertainty on quantifying aerosol climate effect. The direct, indirect and semi-direct climate effects of black carbon depend on its state of the mixing with other water-soluble aerosol components. The process that transforms hydrophobic externally mixed black carbon particles into hygroscopic internally mixed ones is called "aging". In most climate models, simple parameterizations for the aging time scale are used instead of solving detailed dynamics equations on the aging process due to the computation cost. In this study, a new parameterization for the black carbon aging time scale due to condensation and coagulation is presented as a function of the concentration of hygroscopic atmospheric components and the black carbon particle size. It is shown that the black carbon aging time scale due to condensation of sulfuric acid vapors varies to a large extent depending on the sulfuric acid concentration and the black carbon particle size. This result indicates that the constant aging time scale values suggested in the literature cannot be directly applied to a global scale modeling. The aging time scale due to coagulation with internally mixed aerosol particles shows an even stronger dependency on particle size, which implies that the use of a particle-size-independent aging time scale may lead to a large error when the aging is dominated by coagulation.

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An Evaluation of Tensile Characteristics of the Stress Aging Heat-treated SM45C Steel by Acoustic Emissions (음향방출법에 의한 SM45C 응력시효 처리재의 인장특성 평가)

  • Rhee, Zhang-Kyu;Park, Bog-Nam
    • Proceedings of the Safety Management and Science Conference
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    • pp.413-421
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    • 2009
  • This paper investigates tensile characteristics of the stress aging heat-treated SM45C steel which are aging temperature at $250^{\circ}C$, $300^{\circ}C$, aging time at 1, 3 hours, and applied load at 300, 400N conditions by using acoustic emission. Most suitable aging condition was aging temperature $300^{\circ}C$, aging time 1 hour, and aging applied load 300N. And increased yield load 28.3% than non-treatment specimen in this condition. AE energy in elastic limit increased about 16.7 times than non-treatment specimen. When aging time is 3 hours, yield load decreased than other conditions that possibility is high to have itself defect on inside the specimen or coarse grain size precipitation is different in happened over-aging phenomenon. Especially, in case of $300^{\circ}C$, 3 hours and 400N condition appeared AE energy in elastic limit fairly high about 30 times than non-treatment specimen. This is considered by emit a lot of energies when material causes plastic deformation because the ductility increases on specimen by over-aging phenomenon.

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The Effects of Attitude towards Aging on Successful Aging: The Differences between Single and Couple Aged Family (노화에 대한 태도가 성공적인 노화에 미치는 영향: 유배우노인과 무배우노인의 비교를 중심으로)

  • Hong, Sung-Hee;Kwak, In-Suk
    • Journal of the Korean Home Economics Association
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    • v.49 no.4
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    • pp.77-91
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    • 2011
  • The purpose of this study was to find out the variables affecting the successful aging of the elderly. To achieve this purpose, a survey was conducted with 388 seniors living in the Jeonbuk area. The data were analyzed using multiple regressions and a path analysis. The major findings were as follows: First, statistically significantly different perception of successful aging was observed according to their marital status. Second, successful aging of the elderly with a spouse was influenced by personal variables, such as their own perception of economic status, gender, education level and physical condition. In contrast, successful aging of the elderly without a spouse was most influenced by social variables, such as family support. Third, the attitude towards aging directly affected successful aging. Various personal and social characteristics indirectly affected successful aging via attitudes towards aging according to the presence of a spouse.