• 한국의류학회지
• /
• 제29권3_4호
• /
• pp.561-568
• /
• 2005

The irradiation of Ultra-Violet (UV) is an efficient treatment for polymer to improve hydrophilic properties. 4-Channel PET knit fabrics were treated with UVA and UVC to develop functional and environment-friendly fabric. The fabric was treated with various treatment times and distances from UV lamps having different wavelength. FT-IR and XPS investigated the chemical changes. To confirm the change of surface properties, contact angle, surface energy and SEM were examined. The study of UV as a treatment for PET knit fabric shows significant changes in chemical and surface properties, which is proved by analyses. FT-IR and XPS analyses prove the augmentation of carboxylic, Hydrophilic groups on the surfaces treated by UV. The increase of water contact angle and surface energy means more water wettable and surface energy of PET film was substantially increased by UV irradiation time. The ageing after surface treatment had little influence on the surface energy of the irradiated PET film. SEM proves the surface modification of PET such as etching, bubble and crack. The negative effects are increased in accordance with increasing treatment time.

• 한국지역사회생활과학회지
• /
• 제24권1호
• /
• pp.119-132
• /
• 2013

This study aims to understand potential gender differences in the association between job characteristics and job satisfaction among older workers. The data are from 506 males and 202 females older than 55 from the first wave of the Korean Longitudinal Study of Ageing(KLoSA). Analyses focused on examining gender differences in the influences of subjective evaluation of work characteristics measured with education and skill fits of the work, work demands, customary early retirement, as well as more objective job conditions assessed with insurances by the employer, work hours, and salary on job satisfaction. Regression analyses revealed that female workers showed higher job satisfaction while job characteristics worked differently between genders to affect job satisfaction. For males, fitting the job with education and job demands were determining factors of job satisfaction, while the job with skills and work hours appeared to be significant factors for females. Results suggest that opportunities to utilize older workers' human capital and flexible working hours, especially for females workers would be helpful in promoting older adults' employment and satisfaction about their work.

• 한국항공우주학회지
• /
• 제37권7호
• /
• pp.642-652
• /
• 2009

항공기 주구조에 많은 부분은 겹침이음 형태의 조립구조이며 이러한 구조는 프레팅 손상으로 인해 단순피로에 비해 현저히 수명이 감소된다. 특히 노후 항공기의 경우 프레팅 피로균열은 감항안전을 저해하는 중요한 요인으로 최근 대두된 수명연장 문제와 관련해서도 손상허용성 평가에 프레팅 피로수명 예측이 필수적으로 요구되고 있다. 이러한 배경으로 본 연구에서는 볼트 체결력이 서로 다른 겹침이음 구조시편에 대하여 일련의 프레팅 피로시험을 수행하고 탄소성 접촉응력 유한요소해석 결과로부터 프레팅 파라미터를 구하고 균열발생 및 성장 수명예측 모델식과 최근 제안된 수정 모델식을 통하여 프레팅 피로수명을 예측하였다. 또한 시험결과와 비교분석함으로써 실제 항공기 겹침이음 구조에 프레팅 피로수명 예측 모델식의 적용 유효성을 고찰하였다.

• 한국콘텐츠학회논문지
• /
• 제16권2호
• /
• pp.231-242
• /
• 2016

본 연구는 고령화연구패널조사(KLoSA)를 활용하여 중 고령층의 연령대에 따른 고용변화 특성을 종단적으로 분석하고, 고용안정성의 탈빈곤 효과를 추정하였다. 연구 결과 현재의 중 고령층은 조기퇴직 등으로 인해 50대 중반 이후 급격한 고용불안을 경험하며, 이후 재취업이 어려워 향후 노후소득보장 측면에서 위험이 큰 집단으로 나타났다. 특히 시간이 지날수록 중 고령층의 고용불안이 심화되고 있으며, 고령일수록 고용상 지위가 악화되는 것으로 나타났다. 로짓분석을 활용하여 중 고령층이 인지하는 고용안정성이 탈빈곤에 미치는 영향에 대해 분석한 결과, 65세 이상의 고령자보다 조기퇴직이 시작되는 55세 전후에서 경험하는 고용안정성이 가져오는 탈빈곤 효과가 큰 것으로 나타났다. 이는 퇴직 전에 충분한 노후준비를 갖추는 것이 무엇보다 중요함을 의미한다. 이러한 측면에서, 단계적인 정년 연장, 중 고령층에 대한 일자리 대책, 부처간 사업의 통합 및 일관성 확보, 연령 및 특성에 맞춘 맞춤형 고용-복지 연계제도의 도입에 대한 적극적인 정책적 고려가 필요하다.

• 보건행정학회지
• /
• 제22권1호
• /
• pp.49-64
• /
• 2012

With the burden of chronic diseases mounting among the population as a result of its aging, the importance of health examination is being stressed in order to identify and manage diseases in the early stage. Health examination in Korea is divided largely into periodic health examination provided as a national health screening program and individual physical checkups. The advantages of the former include little economic burden on the examined and those of the latter include the freedom of the individual to select various examination headings depending on the individual's characteristics and preferences. With both examinations now being expanded, empirical analyses from various standpoints are needed. This study proposes to analyze traits of the examined and non-examined as shown in the facts and figures of the 1st and 2nd Korean Longitudinal Study of Ageing (KLoSA), thereby make the determinant factors clear leading to the acceptance of the examinations, and analyze the effects of the examinations upon maintaining or moving to healthy lifestyle. It was confirmed that demographic features such as gender and age, socioeconomic features such as the level of education, place of residence and household income, physical and mental state of health such as chronic disease and dementia, and daily living habits are significantly related with whether to accept physical examination. It is also confirmed that physical examination leads to non-smoking, regular physical exercises and regular dietary habits. It is suggested that, to enhance effects of health examinations, follow-up management programs making use of results of health examinations be further expanded, and the national health screening program be more actively put into operation for the bracket lying in the blind spot of the program.

• 보건행정학회지
• /
• 제24권2호
• /
• pp.128-135
• /
• 2014

Background: With ageing and growing importance of disease management system, it is necessary to investigate the extent of regional difference in service utilization for chronic diseases among the elderly and to reflect it in designing the system. Methods: A multiple regression analysis and descriptive statistics analyses were employed using patient survey, which covers nationwide health facilities and their users. Results: While the differences in the rate of service utilization/utilization outside living area between urban and rural areas or between income levels are not large, considerable variations are observed within urban or rural areas and within income groups. Conclusion: This results suggest that it is important to subsidize economically disadvantaged segments of the population and residents of less-favored areas to be better-equipped for chronic disease management in order to prevent the development of severe ailments and the need for treatment at higher-level medical institutions. Improvements to the service infrastructure in vulnerable regions are essential.

• 한국지역사회생활과학회지
• /
• 제24권3호
• /
• pp.343-354
• /
• 2013

Elderly people living in poverty are one of the most vulnerable population groups who are at risk of experiencing social exclusion. Social participation is an important contributing factor to active aging and social integration of the older adults living in poverty. This study aims to identify factors affecting social participation of the poor elderly. Data from the second wave of the Korean Longitudinal Study of Ageing was used for the analyses and 1,346 poor elderly aged over 65 were analyzed. The findings showed that age, education, health status, a level of depression, financial stress, and economic activity were associated with the social participation of the elderly living in poverty. These results indicated that psychological empowerment and specific needs of the older adults living in poverty should be considered in developing services and programs to promote social participation of the poor elderly.

• Macromolecular Research
• /
• 제15권6호
• /
• pp.560-564
• /
• 2007

The photostabilization and cure kinetics of UV-curable, optical resins containing various formulations of photostabilizers were investigated to determine the system with the highest cure conversion and durability. Photo-DSC analysis revealed that increasing the concentration of a UV absorber (UVA) decreased both the crosslink density and the cure rate due to competition for the incident photons between the photoinitiator and the UVA, whereas including a hindered amine light stabilizer (HALS) hardly affected either the cure conversion or the cure rate due to its very low absorption of 365 nm. This result was confirmed by FTIR-ATR spectroscopy and UV-visible spectroscopy analyses. QUV ageing experiments showed that the cure conversion and durability were the highest for the UVA/HALS formulation at a ratio of 1 : 2, which is due to their synergistic action.

• 가족자원경영과 정책
• /
• 제12권3호
• /
• pp.81-101
• /
• 2008

The purpose of this study is to examine support policies regarding work and family reconciliation, to suggest plans to improve workplace policies, and to suggest directions for further studies. This study looks at OECD's work-life reconciliation policies as well as family friendly workplace policies in Korea to find a way to enhance business' receptiveness and implementation of the policies. By examining women's labor conditions, this study finds that family friendly workplace policies are necessarily imminent in our society of low fertility and ageing. Along with the evaluation of benefit level and the effectiveness of current policies, this study uses data from interviews with working mothers who have had the experience of family friendly benefits. The results of the analyses suggest that the government should focus on improving the workplace environment in companies that do not show bias against the use of family friendly policies. In order to farm more successful policies, future studies are needed to analyze the changes of fertility, working conditions, support programs, and benefits.

• Ocean and Polar Research
• /
• 제44권1호
• /
• pp.39-59
• /
• 2022

How in the Antarctic icefish, generally, and Pseudochaenichthys georgianus, in particular, otoliths increase in size and build new material as the fish ages and passes through different life phases is largely unexplored. Morphometric details of 3418 otoliths of Ps. georgianus from S. Georgia and 318 from S. Shetland, were processed and proportions of the amounts of collagen and aragonite removed by EDTA were determined for different age groups. Microstructural investigations showed that characteristics of the 3-dimensinal collagen net are the reason for the radial direction and orientation of the aragonite needles of approximately 1.0 ㎛ in length in larval and 2.3 ㎛ in length in adult specimens. Earlier generated increment layers from the primordial centre (PC) in the dorsal direction restrict those of the secondary centre (SC), causing new growth layer accretion in different directions. In the otoliths of larval Ps. georgianus, aragonite layers are 0.89 ㎛ wide while in juveniles and adults they measure 1.45-2.86 ㎛. Otoliths change from a sphere shape in the larvae to a longish object of irregular outline in the older stages. It is tentaively suggested that the observed otolith shape differences at distinct growth stages are due to physical effects related to swimming speeds at particular water depths and locations. To confirm that otoliths, apart from being useful for age analyses, could also serve to establish correlations between developmental stage and the oceanic environment the fish spend time in, further analyses using additional species and state-of-the-art methods like µCT imaging to evaluate otolith volumes and shapes are required.