• Title/Summary/Keyword: Ageing Society

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The Effect of Ageing on Grain Refinement of CuAlNi Shape Memory Alloy (CuAlNi 형상기억합금의 결정립 미세화에 따른 시효효과)

  • Yang, G.S.;Park, C.S.;Jang, W.Y.
    • Journal of the Korean Society for Heat Treatment
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    • v.8 no.1
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    • pp.65-74
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    • 1995
  • This research was performed to investigate the effect of ageing on grain refinement of 82wt%Cu-13.5wt%Al-4.5wt%Ni-0.1wt% misch metal alloy with ageing temperature and time. The results obtained in this study are as follows; The variation of transformation temperature with ageing temperature had very influence on ageing time at $300^{\circ}C$. But it had not influence on ageing time at $100^{\circ}C$. The variation of transformation temperature after second reversed transformation cycle was not occured in martensitic phase ageing, but $M_s$ point was appeared equally with third reversed transformation cycle in parent phase ageing. The variation of $M_s$ point was not nearly with ageing time at $100^{\circ}C$ ageing temperature. But it was decreasing with ageing time at $300^{\circ}C$ ageing temperature and $A_s$ point was increasing with ageing time. Structure of parent phase ageing was being M18R martensitic and N2H martensitic phase. It was found that ${\alpha}$ and ${\gamma}_2$ phase were created by ageing of long time at $300^{\circ}C$ ageing temperature.

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Analysis of Changes in the Industrial Structure by the Ageing Rate in Korea (고령화율에 따른 농촌지역 산업구조 변화 분석)

  • Kwon, Younghyun J.;Kim, Euijune
    • Journal of Korean Society of Rural Planning
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    • v.20 no.4
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    • pp.183-192
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    • 2014
  • The purpose of this study is to examine the effect of regional ageing rate to industrial structures of rural areas in Korea. This paper shows that there are cause-effect relations between the industrial specialization and ageing rate in 'Agriculture', 'Finance & Insurance', and 'Real Estate & Leasing' sectors. The ageing levels are classified into ageing society, aged society, and super-aged society according to UN standard that cause different impacts on industrial specialization of regions. This paper finds that the industrial specialization is determined by the ageing levels. If there is an increase in ageing rate by 1% in ageing society, the industrial specialization of the three industries could be strengthened by 0.14%. But, ageing rates have negative impacts on the industrial specialization in aged society and super-aged society by 0.76% and by 1.20%, respectively, as increasing ageing rate by 1%. As the ageing rate progresses, 'Agriculture', 'Finance & Insurance' and 'Real Estate & Leasing'sectors have positive impacts on the industrial specialization in the ageing society. But 'Finance & Insurance' and 'Real Estate & Leasing' sectors have changed into negative impacts on the industrial specialization in the aged society. In the aged society, the employment of elderly persons of 'Agriculture' and 'Finance & Insurance' sectors increase by 1% makes positive impact on the industrial specialization by 1.54%, by 0.45%, respectively. The result of this paper can be applied to a significant guideline at establishing regional employment planning such as elderly customized employment, vocational training for rural areas, where above 14% of ageing rate.

Kinetic Studies on the Ageing of Aluminum Hydroxide Gel (수산화알루미늄.겔의 노화에 관한 연구)

  • 유병술
    • YAKHAK HOEJI
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    • v.6 no.2
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    • pp.7-12
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    • 1962
  • The rats of thermal ageing at elevated temperatures and heats of activation of aluminum hydroxide gel have been determined. The ageing was expressed in terms of diminution of acid consuming capacity. Although the actual rates of ageing were different by the samples, the slopes of their Arrhenius plots were the same. This may indicate similarity of ageing mechanisms and heats of activation of samples. The heat of activation was the mangitude of 30 Kcal/mole. Thus, rates of ageing of aluminum hydroxide gel may be greatly accelerated at elevated temperatures.

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Risk Perception of an Ageing Society (고령화 사회에 대한 위험인식)

  • Chung, Soondool;Choi, Hye Ji;Bae, Eun Kyung;Lee, Kyoung Min
    • 한국노년학
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    • v.31 no.3
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    • pp.813-829
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    • 2011
  • The purposes of this study were to explore the perception of risk regarding an ageing society and to suggest the ways of preparation for an ageing society. Based on the social constructionist paradigm from Slovic as to the perception of risk and the perspectives of new social risks fromTaylor-Gooby, we observed risk perception of an ageing society in two ways: ordering of perceived risks and risk perception. Social survey research method was used for this study and data collected from 1,500 subjects aged 20 and over were analyzed. The results revealed that the risk perception of an ageing society was ranked 7th out of 11 social risks. 'Whether or not one perceived he/she lived in an ageing society', 'an ageing society's effects on one's lives', and 'educational background' were the significant variables influencing the ordering of perceived risks of an ageing society. Also, perception of risk regarding an ageing society was significantly associated with 'relation of ageing society with his/her own life', 'an ageing society's effects on one's lives', and 'educational background'. Further discussion for the preparation of an ageing society was provided based on these results.

Mal-differentiation of Stem Cells: Cancer and Ageing (줄기세포의 분화 결손으로 인한 노화와 암화)

  • Lee, Mi-Ok;Cha, Hyuk-Jin
    • KSBB Journal
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    • v.26 no.3
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    • pp.183-188
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    • 2011
  • Adult stem cells, which have characteristic of self-renewal and multipotency, are specialized cell types, responsible for the tissue regeneration of the damaged tissue. Recent studies suggest that stem cells senescence (or stem cells' ageing) is closely associated with the variety of ageing-related phenotypes such as tissue atrophy, degenerative diseases and onset of cancers. During ageing, declining of stem cells function and subsequently occurring mal-differentiation of stem cells would be important to understand the biological process of development of ageing-related phenotypes such as tissue degenerations and cancers. This review focuses on the DNA damage stress as a cause of senescence of stem cells and their mal differentiation, which is closely link to defect of regeneration potentials and neoplastic transformation. Understanding of molecular mechanisms governingsuch events is likely to have important implications for developing novel avenues for balancing tissue homeostasis longer period of time, further leading to 'Healthy ageing'.

The Effect of Ageing Time and Temperature on the Strain Ageing Behaviour of Quenched Zircaloy-4

  • Rheem, Karp-Soon;Park, Won-Koo;Yook, Chong-Chul
    • Nuclear Engineering and Technology
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    • v.9 no.3
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    • pp.117-123
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    • 1977
  • The strain ageing behaviour of quenched Zircaloy--4 has been studied as a function of ageing time and temperature in the temperature range 523 to 588 K for a short-ageing time of 1 to 52 seconds. At the test conditions, the strain ageing stress increased with ageing time and temperature at a strain rate of 5.55$\times$10$^{-4}$ sec$^{-1}$ . Applying stress on the Quenched Zircaloy-4, the strain ageing effect indicated following two stages: an initial stage having an activation energy of 0.39 ev considered to be due to Snoek type ordering of intersitial oxygen atoms in the stress field of a dislocation and a second stage having an activation energy of 0.60 ev, due to mainly long-range diffusion of oxygen atoms.

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Effect of Ageing on Household Demand for Clothing, Food, Housing, and Medical Care Commodities in Korea (고령화가 한국가계의 의식주, 의료품목 수요에 미치는 영향)

  • Kim, Kisung
    • Human Ecology Research
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    • v.53 no.3
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    • pp.309-318
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    • 2015
  • This study investigates to investigate the ageing effect on household demand for clothing, food, housing and medical care commodities in Korea using a demand system model. The cross-sectional and time-series data from Statistics Korea on urban household expenditures and age projection analyzed household demands of consumption commodities. The household head age and elderly population ratio were employed for proxy variables of ageing. Ageing variable elasticities of commodity demands were estimated. Study results show that ageing variables significantly influenced on a household demand for commodities; clothing and food consumption decreases; however, housing and medical care consumption increases with ageing. The elasticities of total consumption expenditures and price variables were estimated in the demand analysis; these two variables significantly impacted almost all of the household consumption for the studied commodities. This study provides an opportunity to examine how ageing influences household consumption for clothing, food, housing and medical care commodities as Korean society experiences a rapid ageing. It is also meaningful that this study conducted a quantitative measuring of the household demands for commodities that was different from past research on the household consumption expenditures for commodities.

Positive ageing: A conceptual framework

  • Sik Hung Ng;Jean Woo;Alex Kwan;Alice Chong
    • Korean Journal of Culture and Social Issue
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    • v.12 no.5_spc
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    • pp.29-43
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    • 2006
  • With longevity (75 years plus and still increasing) now commonly achievable, the new challenge for individuals and society is less concerned with adding more years to life, though that remains important, and more with adding life to years. To explore the quality of long life more fully, a concept broader than healthy ageing or active ageing is needed. For this purpose, the present article describes a framework of Positive Ageing, also known as Successful Ageing, which views the quality of long life as comprising good health, physical and cognitive functional independence, and meaningful engagement with life. Narrowly defined, it refers to old people ageing well in all these aspects. More broadly defined, it refers to ageing well from midlife on. The framework also identifiesvariables that may affect the process of ageing positively. These variables include the social-cognitive styles of control, humour and future-time perspective on the one hand, and on the other hand, resources based on finance, social network and lifestyle.

Ageing inhibition of aluminum hydroxide gel (수산화 알루미늄${\cdot}$겔의 노화방지작용)

  • 이계주;유병수
    • YAKHAK HOEJI
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    • v.18 no.1
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    • pp.20-28
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    • 1974
  • Physical studies of ageing inhibition of aluminum hydroxide gel were carried out. Sorbitol, mannitol and fructose were found to be an ageing inhibitor of the aluminum hydroxide gel. IR spectra and DTA curves showed that the ageing products of the gel by sorbitol orl mannitol were monohydrous alumina. This differs from hydrated hydrous alumina of other ageing products. This evidence indicates that sorbitol and mannitol prevent the hydrous alumina from its hydration.

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Survey of Status for Ageing Population, Charge Organizations and Polices in UK

  • Kee, Dohyung
    • Journal of the Ergonomics Society of Korea
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    • v.33 no.5
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    • pp.387-394
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    • 2014
  • Objective: The purpose of this study is to survey trend and the real state of ageing population in UK, and its charge organizations, relevant policies and studies. Background: As in other countries, UK population is ageing and people aged 65 or over account for about 17% of population in UK. Considering this ageing population, there are varying basic studies and policies for older people in UK. Method: First, the author consulted ageing and its policies in UK with some faculties in an UK university. Next, based on the results of consultation, wide literature survey was conducted, which includes papers in relevant academic journals, publications and website surfing. Results: A number of basic studies for surveying status and characteristics of older people as well as simple population trend for them have been conducted in UK. Healthcare services are free for all UK residents, and varying social care services including equipment, home and residential cares, financial support, etc., are provided by local governments. Cost of social cares is means-tested and is not free for everyone. There are a number of governmental or non-profit organizations dedicated to help older people access social care services or to financially fund research projects older people. Conclusion: There are more basic studies, and healthcare and social care services for older people in UK, compared to Korea. Application: It would be useful as basic data for establishing effective polices for old people in Korea.