• Korean Journal of Social Welfare Studies
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• v.47 no.1
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• pp.261-290
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• 2016

The purpose of this study was to examine how previous grandmaternal child care affects contacts between older mothers and their adult children. This study especially focused on intergenerational long-term reciprocity relationships. In this study, data from the first wave (in 2006) to the forth wave (in 2012) of Korean Longitudinal Study of Ageing yielded a sample of 1,925 elderly mothers and 7,460 adult children. This study employed multi-level analyses considering hierarchical structures between the mothers and their adult children. In this study, past grandmaternal child care was measured by providing care behavior and unit of time for care. Intergenerational contacts was measured by frequency of face-to-face and non-face-to-face contacts. The results showed that adult children who previously received child care from their mothers were more likely to contact to their mothers. Additionally, the increasing amount of time for elderly mothers to provide care to their grandchildren led to more frequent contacts between elderly mothers and their adult children. The findings proved that grandmaternal child care was in important position in reciprocal relationships between elderly mothers and their adult children. Through these results, this study suggested theoretical, policy, and practical implications.

• 한국노년학
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• v.40 no.3
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• pp.413-428
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• 2020

The purpose of this study was to analyze the effects of digital literacy and the frequency of contact with children or grandchildren via ICT on cognitive functions of 8,942 adults over age 65 who responded to the 2017 National Survey of Older Koreans, using multiple regression analysis. We found that digital literacy was the most significant factor on cognitive functions of the elderly. Also, the frequency of contact with grandchildren via ICT was a positive factor for cognitive function and had a positive correlation with digital literacy. Based on this results, the importance of digital literacy education and intergenerational communication via ICT were discussed.

• 한국노년학
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• v.27 no.2
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• pp.503-518
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• 2007

The intergenerational support exchange depends on elder's objective conditions and social context, and its effects are diverse. I argue that not only capacity such as health condition and economic status but also relational properties among parent(s) and adult children are important to determine their reciprocal support exchange. Seoul area is selected, and 730 elders are interviewed to be analyzed quantitatively. The survey data are collected based on the structured questionnaire. Findings are partly supportive to the arguments presented above. The relational properties, especially coresidence, the number of adult children, and contact frequency independently influence reciprocal support. The better health conditions of parent(s) are, the more support to adult children is given. The economic status is related to financial support exchange only. The types of intergenerational support exchange include dependant, balanced, and generalized reciprocity. The most important determinant of the reciprocity is the elders' health condition.

• Korea journal of population studies
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• v.23 no.2
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• pp.189-207
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• 2000

Focusing on the factors related to the amount of contact between young married women and their noncoresident parents and their noncoresident parents-in-law, the study hypothesized two scenarios. (1) filial piety scenario which predicts that the contact with one set of parents is not affected by accessibility of other set of parents, and (2) competition scenario which predicts that ease of contact with one set of parents inhibits contact with other set of parents. These scenarios were tested against the data from National Fertility and Family Health Survey in 1994. The regression analysis of intergenerational visits appeared to support the competition scenario : The parents-in-law and the parents seem to bs in competition for visits by young married women - distance from the parents from one side has a parallel relationship to more frequent visits with the other set of parents. This is a much more equal footing for both sides of the family than attention to filial piety would predict. although the level of support from the young generation may keep declining.

• 한국노년학
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• v.29 no.4
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• pp.1665-1683
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• 2009

The purpose of this study is to examine what the formation of a community incorporating two generations of people can give the elderly and the problems which are associated with establishing related programs of this kind. For this, the researcher enacted ethnographic method like as observant participation and in-depth interview on 24 participants. From this study, I found that the elderly and the children who took part in several programs to form the intergenerational linkages made the system meaningful in the following ways: first, the more harmonious the communication across between two age groups is, the more the understanding between them increases. Second, the sense of community has intensified the natural harmony. Third, the more self-satisfaction and confidence increases, the more self-efficacy is enhanced. Fourth, the purposeful and creative activities with peers have enabled the elderly to enjoy their leisure time. Fifth, the elderly have experienced the pleasure of learning and sharing common sense as a life-long learners. However, in the process of this program, several problems occurred such as the rigidly bureaucratic operation of the program and the elderly people's individual differences. In addition, the lack of a precisely-existing program necessary to form the intergenerational linkages and to bring together different generations was a problem. Finally, I have concluded that the effort to form the intergenerational linkages helps increase the understanding and cooperation across age groups and contributes to the successful aging of the elderly.

• 한국노년학
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• v.34 no.2
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• pp.277-297
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• 2014

This study investigates the predictors of the relationship quality between grandparents and grandchildren in emerging adulthood. Participants were 501 grandchildren with at least one living maternal/paternal grandparents. According to the t-test, the frequency of contact with maternal grandparents, the similarity of value to paternal grandparents, and the affective solidarity with paternal grandparents were significantly different depending on the grandchildren's sex. Results of multiple regression analyses indicated that the relationships of father-grandparents and mother-grandparents, the frequency of contact, and the similarities of value significantly predicted the affective solidarity between grandparents and grandchildren. However, the relative predictive power of these variables was different by the lineage and the grandchildren's sex.

• Journal of Families and Better Life
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• v.34 no.2
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• pp.15-27
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• 2016

This study examined intergenerational contact and financial support exchange between parents and each of their non-coresident married children. Prior qualitative work has suggested that increased contact between parents and their married daughters may indicate a decline in patrilineal norms in contemporary Korean families. Using a nationally representative sample, this study investigated if married daughters engage in similar levels of intergenerational contact and financial support exchange with their parents in contrast to their married brothers (first-born sons in particular). The data were drawn from the first wave of the Korean Longitudinal Study of Ageing (KLoSA, 2006). For analyses, individuals who had at least one non-coresident married child were selected, resulting in the analytic sample of 3,950 parents with 10,947 non-coresident married children. Both regression with robust standard errors and sibling fixed effects regression models were estimated using the reg and xtreg procedures in STATA. Residential proximity and sociodemographic characteristics of both parents and children were controlled in analyses. Findings suggest that, overall, parents report more frequent face-to-face contact with and financial support from their first-born sons in comparison to other sons and daughters. Daughters, on the other hand, were found to engage in more frequent contact via phone call, mail, or email with their parents. In conclusion, we did not find a strong evidence to support the contention that patrilineal norms have softened in contemporary Korean families to the extent that has been suggested in qualitative studies.

• Journal of Family Relations
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• v.22 no.2
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• pp.119-145
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• 2017

Objectives: Grounded in a life-course perspective, this study examined the effects of non-coresident children's transitions to marriage and parenthood on the frequency of contact with their parents. Gender of adult children and the educational levels of both adult children and their parents were evaluated as potential moderators of the transition-contact linkages. Method: The analytic sample consisted of adult children aged between 20 and 50 whose parents participated in four waves of the Korean Longitudinal Study of Ageing (2006, 2008, 2010, 2012). For analysis, fixed effects regression models were estimated using the xtreg procedure in Stata. Results: First, transition to marriage was associated with a decrease in face-to-face contact, whereas a greater increase in contact with parents via phone, mail, email etc. occurred only among newly married with less than college education compared to the newlywed with college degrees. Second, transition to parenthood was associated with an increase in contact via phone, mail, email etc. In addition, a greater increase in face-to-face contact was found with parents who completed high school or more education compared to those with less than high school education. Conclusions: The findings suggest that adult children's transitions to marriage and parenthood may bring about increases in contact with their parents, particularly for adult children with less than college education and parents with more than high school education.

• Journal of the Korean Society for Railway
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• v.17 no.3
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• pp.157-164
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• 2014

The contact force between the pantograph and the catenary is a key factor determining the current collection quality, as they can ensure stable electrical power to the train. In this study, we analyzed the dynamic contact force for HEMU-430X depending on the train speed. It was confirmed through the results that the standard deviation of the contact force increases with an increase in the train speed. It was also verified that the span of the catenary system is a very important factor with regard to the contact force when analyzed with frequency analysis. To secure stable power in speed that exceeds 400km/h, the statistical variation of the contact force should be minimized. To realize this, the catenary tension was increased and the mass of the pan-head was decreased. The ensuing effects were then quantitatively analyzed in terms of the contact force. In addition, the differences in the contact force between a tunnel and an open field were analyzed based on a frequency analysis.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2017.05a
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• pp.112-112
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• 2017

광학적 전기적 특성이 우수한 Indium Tin Oxide (ITO)는 대표적인 투명전극으로 사용되어지고 있다. 하지만 Brittle한 성질로 인해서 플렉서블한 디바이스에 적용하기에는 어려움이 있다. 이러한 문제를 해결하기 위해 본 연구에서는 용액 공정으로 제조 단가가 비교적 저렴하며, 높은 투과도와 전기전도 특성을 가지는 투명전극으로 주목받고 있는 차세대 투명전극인 AgNW에 관한 연구를 수행하였다. AgNW는 나노와이어가 네트워크를 형성하고 있어 높은 전도성과 광 투과도를 가지지만 용액 제조시에 분산에 용이하기 위해서 흡습성의 고분자 물질로 둘러싸여 있기 때문에 환경 안정성이 좋지 않다는 단점이 있다. 또한 나노와이어 간의 높은 접촉저항으로 인해서 접촉저항을 감소시키기 위한 후처리 공정이 요구되어진다. 이를 해결하기 위해 본 연구에서는 AgNW 전극에 플라즈마 처리를 통해서 나노와이어간의 접촉저항을 감소시켜 전기적특성이 약 12% 향상됨을 확인하였다. 고온, 고습 장시간 안정성테스트 결과, 기존 AgNW 전극에 비해서 플라즈마 처리와 보호막을 형성한 AgNW는 저항증가율이 3배 이상 감소하여 환경안정성이 향상된 것을 확인하였다. 이는 흡습성 고분자 물질이 플라즈마 처리에 의해 제거되었고 보호막을 형성하여 산소와의 반응을 감소시켰기 때문으로 판단된다. 플라즈마 처리와 보호막을 형성한 AgNW 전극을 적용하여 투명히터, Polymer Dispersed Liquid Crystal(PDLC)등 다양한 디바이스에 적용한다면 기존의 AgNW 전극보다 높은 효율을 기대할 수 있을 것이라 예상된다.