• 열처리공학회지
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• 제8권1호
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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.

• 농촌계획
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• 제20권4호
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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.

• 약학회지
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• 제6권2호
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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.

• 한국노년학
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• 제31권3호
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• pp.813-829
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• 2011

본 연구는 고령화 사회에 대한 사회구성원들의 위험인식을 고찰하고, 우리 사회의 고령화 사회 준비와 그 방향을 모색해 보기 위한 목적으로 수행되었다. 본 연구는 사회적 위험에 대한 Slovic의 구성주의적 인식과 Taylor-Gooby의 신사회적 위험의 시각을 바탕으로 고령화 사회에 대한 위험인식을 위험순위와 위험인식으로 유형화하여 고찰하였다. 사회조사 연구로 설계했으며, 할당표집으로 추출한 20세 이상 성인 남녀 1,500명을 대상으로 수집한 자료를 분석하였다. 연구결과 고령화 사회에 대한 위험인식은 11개 위험영역 중 7번째로 나타났으며, 고령화 사회에 대한 위험순위는 '고령화 사회에 살고 있는지에 대한 인지여부', '고령화가 삶에 미치는 영향', '최종학력'에 의해 유의미한 영향을 받는 것으로 나타났다. 한편 고령화 사회에 대한 위험인식은 '고령화 사회의 자신과 연관성', '고령화가 삶에 미치는 영향', '최종학력'에 의해 유의미한 영향을 받는 것으로 나타났다. 이를 바탕으로 우리 사회구성원의 고령화 사회 준비와 그 방향에 대해 논의하였다.

• KSBB Journal
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• 제26권3호
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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'.

• Nuclear Engineering and Technology
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• 제9권3호
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• pp.117-123
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• 1977

소입된 질칼로이-4의 가공시효(strain ageing) 현상에 미치는 시효시간 및 온도의 효과를 523-588 狂 온도 구간에서 1~52초의 짧은 시효기간에 조사하였다. 이 실험 조건하에서, 가공시효응력은 5.55$\times$$10^{-4}$ sec$^{-1}$ 신연속도(strain rate) 경우 시효시간 및 시효온도가 증가할수록 증가하였다. 소입된 질칼로이-4의 응력부하 하의 가공시효 현상이 두 한계로 나타나는 것이 확인되었는데 첫단계는 0.39ev의 활성화 에너지 값의 구간으로 이는 전위 (dislocation) 주위의 응력상태로 인한 침입형 산소원자들의 Snoek타입의 배열 (ordering)로 인한 것으로 고려되었으며 두번째 단계는 0.6ev 활성화에너지 값을 갖는 구간으로 이는 주로 산소원자들의 장범위확산에 기인하는 것으로 해석되었다.

• Human Ecology Research
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• 제53권3호
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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.

• 한국심리학회지 : 문화 및 사회문제
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• 제12권5호_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.

• 약학회지
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• 제18권1호
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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.

• 대한인간공학회지
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• 제33권5호
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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.