• Structural Engineering and Mechanics
• /
• 제62권2호
• /
• pp.151-162
• /
• 2017

Two $Chang-{\alpha}$ dissipative family methods and two $KR-{\alpha}$ family methods were developed for time integration recently. Although the four family methods are in the category of the dissipative structure-dependent integration methods, their performances may be drastically different due to the detrimental property of weak instability or overshoot for the two $KR-{\alpha}$ family methods. This weak instability or overshoot will result in an adverse overshooting behavior or even numerical instability. In general, the four family methods can possess very similar numerical properties, such as unconditional stability, second-order accuracy, explicit formulation and controllable numerical damping. However, the two $KR-{\alpha}$ family methods are found to possess a weak instability property or overshoot in the high frequency responses to any nonzero initial conditions and thus this property will hinder them from practical applications. Whereas, the two $Chang-{\alpha}$ dissipative family methods have no such an adverse property. As a result, the performances of the two $Chang-{\alpha}$ dissipative family methods are much better than for the two $KR-{\alpha}$ family methods. Analytical assessments of all the four family methods are conducted in this work and numerical examples are used to confirm the analytical predictions.

• 산경연구논집
• /
• 제8권5호
• /
• pp.35-42
• /
• 2017

Purpose - This study investigated small business members' cognition of happiness in accordance with changes of employment environment at the nation's industrialization. The study verified effects of labor workers' psychological wellbeing conditions upon life satisfaction as well as the effects of job burden and family burden of employment instability. Research design, data, and methodology - The subjects were small business workers in Seoul and Metropolitan areas. The author collected 150 copies of effective questionnaires. Regression analysis, hierarchical analysis and 3-stage mediation regression analysis were done. Results - The findings of this research was that psychological wellbeing factors alleviated job burden and family burden to increase satisfaction with life. Employment instability moderated between job burden and satisfaction with life, job burden between environmental control and satisfaction with life, and family burden between goal and satisfaction of life. Members needed sub factors of psychological wellbeing, especially reflection for self-acceptance. Conclusions - This study inspected effects of small business workers' psychological wellbeing upon life satisfaction at changes of management environment as well as labor environment to verify effects of job burden, family burden and employment instability and to find out conditions of human resources management from point of view of small business and workers.

• 가족자원경영과 정책
• /
• 제8권1호
• /
• pp.79-100
• /
• 2004

This study attempted to examine the employment instability on consumer's use of credit as a financing medium. The purpose of this study was 1) to examine the effect of employment related factors on consumers' use of credit; 2) to compare the results between the two different economic situations. A conceptual framework was developed based on the permanent income hypothesis, family stress theory, and the previous empirical studies. Using data on working households ih the 1992 and 1998 Survey of Consumer Finances (SCF), double-hurdle analyses were conducted. The results suggested that employment related factors that measured employment stability were significantly related to the likelihood of having an outstanding balance on their credit account but were not the influential factors in determining the amount of the outstanding balance. Among other factors, resources factor played the most significant role in determining both the likelihood of having an outstanding balance and the amount of the balance. Although the 1992 and 1998 data represent economic downturn and economic prosperous period, the effects of the factors including employment instability factors were similar between the two periods. This imply that employment instability has increased even in the economic prosperous period. From the findings, several implications for policy makers, credit industry, and financial educators were suggested.

• 대한영양사협회학술지
• /
• 제19권2호
• /
• pp.140-158
• /
• 2013

This study analyzed the effect of family meals on the psychological problems of children. We performed focus group interviews (FGI) on the basic characteristics of family meals, and chose several scales (such as Child Behavior Checklist (CBCL), self-esteem, and a daily hassles questionnaire), to measure the psychological variables. We collected data from 442 dyads (mother-child) and used 440 from dyads. In our results, the frequency of family meals affected the psychological problems of children, especially aggression and emotional instability. The atmosphere during meals also affected depression/anxiety, concentration difficulties, emotional instability, self-esteem, peer relationships, and sociality. There were significant correlations between meal atmosphere, family bonding, maternal personality, and psychological problems of children. We performed covariation analysis to examine and control the influence of family bonding and maternal personality; despite controlling for these variables, family meals still influenced children's psychological problems. We conclude that the family meal is a significant variable that impacts the emotional and behavioral problems of children and stress the importance of frequent family meals.

• 대한가정학회지
• /
• 제40권9호
• /
• pp.17-33
• /
• 2002

This study was to investigate the relationships of personal resources, individual psychological variables, and relational characteristics with marital instability of wives who experienced physical and/or psychological abuse from their husbands, and to analyze the relative significance of related variables on marital instability. Self-administered questionnaire method was used to collect data from 500 wives residing in Chonbuk-do province, and data from 306 wives who reported to be psychologically and/or physically abused during last three years were used in the final analyses. Results showed that there were significant differences in the levels of marital instability according to wives' employment status, number of children, and occupational status of husbands. Correlational analyses indicated that wives' economic dependence, all individual psychological variables, and three relational variables were significantly correlated with marital instability of abused wives. Finally, multiple regression analyses showed that marital comparison level and degree of abuse from husband were the most powerful predictors on marital instability, and all these variables accounted for 61% of the total variance of abused wives' marital instability.

• 한국인구학
• /
• 제31권2호
• /
• pp.21-44
• /
• 2008

이 논문은 가족의 불안정성이 노인자살에 미치는 영향을 확인하고 시간의 흐름에 따른 변화 추이를 살펴보는데 목적이 있다. 연구를 위해 거주 지역, 가족불안정성, 사회경제적 수준을 설명변수로 인과구조의 분석모형을 만들었다. 자료는 1995년, 2000년, 2005년의 사망원인통계와 시 군 구 지역단위통계, 그리고 인구동태통계를 활용하였다. 이혼을 통해 가족불안정성을 측정하였으며, 이혼이 미치는 영향을 자세히 살피기 위해 노인과 20-50대, 그리고 남자노인과 여자노인자살률을 분석에 같이 사용하였다. 기존 문헌검토를 통해 가족불안정성과 노인자살에 대한 가설을 설정하였다. GIS를 이용하여 세 시점의 자살률을 제시하였고, 거주 지역 및 이혼에 따른 노인자살률의 차이를 검증하기 위해 분산분석과 회귀분석을 실시하였다. 이혼율은 대도시 지역을 중심으로 중부 내륙지방을 제외한 대부분 지역에서 높게 나타난다. 일부 지역에서만 높은 수치를 보이던 노인자살률은 시간의 흐름에 따라 높아져, 최근에는 남서해안을 제외한 전 지역에서 높게 나타나고 있다. 또한 최근 10년간 농촌지역에서의 노인자살률이 급격하게 증가했음을 알 수 있었다. 이는 농촌지역에서의 노인 문제가 심각함을 보여주는 결과이다. 경제위기를 겪으면서 급증한 이혼은 가족불안정성으로 이어져 자살률을 높이는 효과를 보여준다. 노인자살률과 20-50대 자살률에 미치는 이혼의 효과는 동일하게 나타나고 있으며, 노인의 경우 더 강한 정적인 영향을 미친다. 이혼이 자살에 미치는 효과는 성별에 따른 차이를 보여주는데, 여자노인보다 남자노인자살률을 높이는 방향으로 작용하고 있다. 분석결과들을 통해, 가족불안정성이 특히 남자노인자살에 가장 큰 영향을 미치고 있음을 알 수 있다.

• 가정과삶의질연구
• /
• 제28권3호
• /
• pp.1-12
• /
• 2010

This study identifies how marital interaction influences the marital instability of foreign wives. Data for the study were based on a snowball sampling of 101 foreign wives married to Korean husbands in Gyeongnam, Korea. The respondents reported higher levels of perceived spousal support, marital satisfaction, and sexual satisfaction, but reported lower levels of spousal hostility. A hierarchical regression analysis was conducted to identify the variables that affect marital instability. Independent variables included in the study were years married, religion, monthly income, educational level, perceived husband support, sexual satisfaction, marital satisfaction, and perceived husband hostility. While religion, educational level, sexual satisfaction, marital satisfaction, and perceived husband hostility had a strong effects on the marital instability of foreign wives, years of marriage, monthly income, and perceived husband support did not show significant effect on marital instability. Marital satisfaction had the strongest effect on marital instability.

• 대한수학회지
• /
• 제54권2호
• /
• pp.663-673
• /
• 2017

We consider the multi-harmonic model for the bubble evolution in the Rayleigh-Taylor instability in two and three dimensions. We extend the multi-harmonic model in two dimensions to a high-order and present a new class of steady-state solutions of the bubble motion. The growth rate of the bubble is expressed by a continuous family of two free parameters. The critical point in the family of solutions is identified as a saddle point and is chosen as the physically significant solution. We also present the multi-harmonic model in the cylindrical geometry and find the steady-state solution of the axisymmetric bubble. Validity and limitation of the model are also discussed.

• Human Ecology Research
• /
• 제52권5호
• /
• pp.457-471
• /
• 2014

Family instability has a negative effect on not only an individual household but also the society. The government continues to operate family support centers as a countermeasure to family instability issues. A healthy and multicultural family support center is considered an effective support system that extends from a family unit to the local community. In this study, the satisfaction and demand levels of each center, located in Seoul and Incheon, were examined with respect to items such as operation contents, physical space, and organizational structure. The results showed that various efforts for creating a family-friendly community were implemented in healthy family support centers and multicultural family support centers. It was found that the center organizers and operators focused more on software and programs than on the physical environment. There was mostly a shortage of physical and environmental space. This space shortage limited the planned and ongoing activities in terms of the residents' self-directed participation and space formation for a family-friendly educational culture. Therefore, it was necessary to set up the space-related criteria for each center in order to solve this environmental issue. We identified the baseline data of the criteria for a center's physical and spatial design and size. In particular, it was suggested that a more strategic physical and spatial design is needed to achieve an integral and effective operation for the connection of the family with the local society.

• 가정과삶의질연구
• /
• 제25권1호
• /
• pp.45-58
• /
• 2007

This study explored the impact of couple interaction behaviors on the relationship between economic stress and marital instability. The study results showed that economic satisfaction and economic pressure greatly influenced the marital instability of married males and females. However, the interaction behaviors of couples tended to have a stronger impact on marital instability than economic stress. In other words, perceived spouse support and perceived spouse hostility had a significant impact on marital instability, with perceived spouse hostility being the more damaging of the two. The study also showed that there were sender differences regarding the impact of couple interaction behaviors on marital instability and economic stress. For married males, economic satisfaction as well as couple interactions influenced significantly on their marital instability. For females the impact of couple interactions on their marital instability tended to be more salient. On the whole, the results of the interaction effects between economic stress and couple interaction behaviors on marital instability did not appear significant, except in the case of females' perceived spouse hostility and its effect on marital instability.