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주변모형 및 주변모형의 모형검진을 이용한 한부모가족의 우울요인에 대한 분석
차수진,한상태,정형철,김성용 한국자료분석학회 2019 Journal of the Korean Data Analysis Society Vol.21 No.2
A single-parent family is a household where a male householder or a female householder raises an unmarried child regardless of marital status. Parents of single-parent families are experiencing many economic and psychological difficulties, and it is known that the degree of depression is higher than that of two-parent families. Recently, as the single parents' family is increasing, there is a need for policies to resolve the difficulties of single parent families. In this paper, by using Korean welfare panel data, the economic, social and psychological factors affecting the depression of single parent families' parents are investigated. For the analysis, marginal model is adapted, and parameter estimation method, and hypothesis testing method for marginal model are introduced. In addition, model diagnosis methods are introduced to help other researchers who want to use marginal model. As a result of data analysis, it was found that not only economic factors but also factors such as children's relationship and parents’ health influenced depression more than economic factors. In addition, the fitted model is valid using the residual cumulative sum method which is a method for model diagnosis. 한부모가족은 혼인 여부와 상관없이 남성가구주 또는 여성가구주 한명이 미혼자녀를 양육하는 가구이다. 한부모가족의 부모는 경제적, 심리적으로 많은 어려움을 겪고 있으며, 이로 인해 양부모 가정보다 우울증에 걸리는 비중이 더 높은 것으로 알려져 있다. 최근 우리나라는 한부모가족이 점점 더 증가하는 추세에 있어, 한부모가족의 어려움을 해결하기 위한 방안이 필요로 되어지고 있다. 본 논문에서는 우리나라의 대표적 패널자료인 한국복지패널자료를 이용하여 한부모가족 부모들의 우울증에 영향을 주는 사회적, 경제적 요인을 파악하고자 한다. 본 논문에서는 패널자료분석을 위해 주변모형을 이용하였으며, 주변모형의 설정, 모수추정 방법 및 가설검정 방법 등에 대해 소개하였다. 또한 모형적합 후, 모형검진을 위한 방법을 소개하여 향후 주변모형을 이용하고자하는 연구자들에게 도움이 되고자 하였다. 분석결과, 기존에 알려진 경제적 요인뿐만 아니라, 자녀관계, 부모의 건강 등 비경제적 요인이 경제적 요인보다 더 우울증에 영향을 주는 것으로 밝혀졌다. 또한 모형검진 방법인 잔차누적합 방법을 이용한 결과 적합된 모형이 타당함을 알 수 있었다.
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Work-Family Conflict and Health among Married Workers in South Korea: A Gender Analysis
차수진,정혜주 한국사회보장학회 2015 한국사회보장학회 정기학술대회 Vol.2015 No.2
The patriarchal culture and institutions have been slow in adjusting to the labor market change, which makes the work-family conflict an important social issue in South Korea. South Korea’s one of the lowest female labor market participation rate among OECD countries is one of the evidences of the high work-family conflict. According to the role strain theory, work family conflict occurs when the role in the workplace and the role in the family collides each other. There have been many efforts to test this theory of the work-family conflict in various societies. Also, only few of previous studies on the work-family conflict focused on the health outcomes. The goal of this study is to identify (1) the physical and mental health consequences of the work-family conflict and (2) its gender difference among South Koreans. Using the data from the 2012 Korean General Social Survey (KGSS), 498 married workers were included as a study population. Work-family conflict was measured with 2 variables in 2 domains each: (1) work to family and (2) family to work conflict. Health outcomes were divided into physical health and mental health; (1) physical health was measured with self-rated health and (2) mental health was measured with depressive symptoms (The Patient Health Questionnaire-9) and suicidal behavior (Korean version of Mini International Neuropsychiatric Interview). Socio-demographic, work domain, and family domain factors were considered as confounders of the associations between work-family conflict and health outcomes. All analyses were conducted using STATA version 12. Firstly, there were consistent associations found between work-family conflicts and health outcomes among total married workers. Poor self-rated health, depressive symptoms and suicidal behavior were positively associated with strain based and time based work-to-family conflicts and strain and responsibility based family-to-work conflicts, when all possible confounders were adjusted. Secondly, slight gender moderating effects on these associations were found, even though it was not statistically significant. Among women, strain based and time based work-to-family conflicts were significantly associated with all health outcomes; poor self-rated health, depressive symptoms, and suicidal behavior. On the contrary, among men, strain based family-to-work conflict and responsibility based family-to-work conflict were significantly associated with poor self-rated health and suicidal behavior. Regarding socio-demographic, work and family domain factors, caregiving hours were negatively associated with poor self-rated health both among men and women. However, managerial position and presence of children younger than 6yrs old had positive association with depressive symptoms and suicidal behavior only among women and working hours and income level had positive association with depressive symptoms and suicidal behavior only among men. The results suggest that the work-family conflicts have negative impacts on the health outcomes of the married workers in South Korea and there are gender moderating effects in terms of the fact that the work-to-family conflict has more association with women and the family-to-work conflict with men. Therefore, family friendly policies should be introduced focusing on this gender difference to improve the health of the married working population. For women who have children younger than 6 years of age, reducing their household burden as well as improving their status at work and for men, increasing hours spent at family and adjusting working hours would be needed. By doing these, it would be possible not only to enhance the health of married workers but also to reduce the gender gaps in the labor market, the so called sexual division of labor, too.
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AgNW Treated PU Nanofiber/PDMS Composites as Wearable Strain Sensors for Joint Flexion Monitoring
차수진,Inhwan Kim,Eugene Lee,Eunji Jang,조길수 한국섬유공학회 2020 Fibers and polymers Vol.21 No.11
In this study, wearable polyurethane (PU) nanofiber-based silver nanowires (AgNWs)/polydimethylsiloxane (PDMS)composites were fabricated and demonstrated as strain sensors to monitor human arm joint movements, investigating electricalresistance change with deformation. With varying content of AgNWs (0.5 wt%, 0.75 wt%, and 1 wt%) in ethanol, PUnanofiber nonwovens were coated with the AgNWs followed by packaging and encapsulation process with commercial snapbuttons and PDMS coating. Each sample’s surface morphology was characterized by scanning electron microscopy (SEM). After the curing process at 50 oC for 2 hours, the fabricated sensors were integrated to textile-arm sleeves for the wear-trialswith a dummy and three human subjects. Given that the resistance of the sensors were the lowest when treated with 1 wt% ofAgNWs, the sensors initially showed increase in resistance according to bending motion while the excessive bending resultedin decreasing trend in resistance. Regarding the varying joint flexion speed (0.125-0.5 Hz), sensors with 1 wt% of AgNWsshowed the best performance as wearable strain sensors with more accurate signals and stability even under higher frequency.
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차수진,박서라,김동한 한국식품저장유통학회 2017 한국식품저장유통학회지 Vol.24 No.2
The effect of sweet potato on the quality of Doenjang was investigated during fermentation. Viable cells of yeast decreased gradually after 4 weeks of fermentation, but those of aerobic bacteria increased in the late stage. Amylase activity of Doenjang was higher in the late stage of fermentation, while neutral protease maintained high activity during fermentation. Hunter L and b values of Doenjang decreased gradually during fermentation, while a value was increased. The pH of Doenjang decreased gradually until 10 weeks of fermentation, and the titratable acidity was low in the sweet potato added groups. The acid value was low in the Shinyulmi sweet potato added Doenjang. Water activity and oxidation-reduction potential of Doenjang decreased during fermentation. Reducing sugar of Doenjang decreased in the middle stage of fermentation, and it was low in sweet potato added groups. The alcohol content of Doenjang decreased after 2 weeks of fermentation. Amino and ammonia-type nitrogen of Doenjang increased during fermentation and reached the maximum after 10 and 12 weeks of fermentation, respectively. After 12 weeks fermentation, 8% of Shinyulmi sweet potato added Doenjang was more favorable taste, flavor and overall acceptability (p<0.05) than the control or the Yeonwhangmi sweet potato added groups.
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