• Kyungpook Mathematical Journal
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• 제46권1호
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• pp.145-152
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• 2006

In this paper, we study a class of strongly nonlinear implicit complementarity problems in the setting of Hilbert spaces H (not necessarily Hilbert lattices). By using the property of the projection and a suitable change of variables, we establish the equivalence between the strongly nonlinear implicit complementarity problem and the fixed point problem in H. Moreover, we use this equivalence and the fixed point theorem of Boyd and Wong to prove the existence and uniqueness of solutions for the strongly nonlinear implicit complementarity problem in H.

• 한국산학기술학회논문지
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• 제15권8호
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• pp.5349-5354
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• 2014

기후변화는 시스템의 취약성을 증가시키는 매우 중대한 요인 중 하나이다. 그러므로 다양한 방법으로 취약성을 평가하여, 그 영향을 최소화시키는 방향으로 적응정책을 수립하도록 하는 것은 매우 중요한 일이다. 그러나 취약성 계산을 위해 고려하는 다양한 대리변수들이 취약성을 적절히 표현하고 있는지에 대한 고찰은 잘 이루어지지 않고 있다. 그러므로 본 연구는 기후변화 취약성을 계산하기 위해 고려되는 다양한 대리변수들 가운데 재난 및 안전관리 교육에 관련된 변수들이 비구조적 적응능력을 대표하기 위해 고려되어야 한다는 것을 전문가들의 설문조사를 통해 보였다. 조사결과, 교육대상과 지역의 특성에 따라 재난안전교육이 기후변화 취약성에 기여하는 정도가 달라질 수 있음을 알 수 있었다. 이 결과는 향후 기후변화 적응정책을 수립하는데 지역별 기초자료로 활용될 수 있을 것이다.

• 대한가정학회지
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• 제40권2호
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• pp.115-130
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• 2002

The purposes of this study was to analyze the effects of household characteristics and financial variables on financial management behavior and financial solidity. The major results could be summarized as follows. First, Debt management behavior and risk management behavior reveled a higher score than any other financial management behaviors. The main determinants of financial management behavior were financial communication and financial attitudes. The more positive financial attitudes and the more financial communication were, the better the financial management behavior followed. The set of households characteristics variables accounted for 2% of the variance in the financial management behaviors. But the addition of financial related variables resulted in an R2 change of 33%. Second, the financial solidity by median was 4.10. It means that usuable net asset is four times higher than the total amount of risk. Household head\`s age, financial attitudes and financial management behavior were the variables affecting the financial solidity.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.1520-1523
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• 1997

A rigorous dynamic simulation was performed in binary gas mixture H$_{2}$/CO (70:30 vol.%) to determinate start-up operating conditions of PSA(Pressure Swing Adsorption) processes. The rigorous dynamic model for the PSA process contains an Ergun equation for expressing the pressure drop in a bed, and valve equations to compute the boundary pressure change of the bed. As the result of the continuous dynamic simulation of 100 operating cyles in various initial conditions, the unsteady-state appeared in the early period and the cyclic steady-state came out about 20th cycle in feed condition and vaccum condition, and 30th cycle in pure H$_{2}$ condition. As time goes by valve equations made change the pressure at each end of the bed in ressurization, countercurrunt-depressurization and pressure equalization steps. The H$_{2}$ purity and the recovery is 99.99% and 86.73% respectively, which is slightly higher than the experimental data. Main contributiion of this study includes supplying fundamental technologies of handling combined variables PSA processes by developing rigorous models.

• 대한가정학회지
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• 제39권8호
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• pp.121-136
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• 2001

The purpose of this study was to analyze the effects of financial attitudes and financial communication on financial satisfaction. For this study, in 2000, questionnaires developed by the researcher were given to 320 households in Kwangju. resulting in 262 households with usuable data. The data were analyzed by various statistical methods such as frequency, percentile, correlation analysis, t-test, Anova, Multiple Regression analysis. The major findings of this study were as follows; 1) Financial attitudes were significantly different according to age and monthly savings 2) Financial communication was significantly different according to age and financial subjective variables. 3) Financial satisfaction was significantly different according to monthly income, monthly savings, monthly living costs, debt, financial subjective variables and financial communication. The set of socio- economic characteristics variables accounted for 3% of the variance in the financial satisfaction. But the addition of subjective characteristics variables, financial attitude, financial communication resulted in an $R^2$ change of 20, 23, 26%.

• 한국식품조리과학회지
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• 제6권4호통권13호
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• pp.41-50
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• 1990

This study aimed to investigate the change in food balance and dietary patterns, caused by the growth of per capita GNP during $1962{\sim}1987$. For the purpose of this analysis, ordinary least square (OLS) was adopted. Per capita GNP was independent variable and the other factors dependent variables. The other factors included Engel coefficient, food supply, energy supply, nutrient intake and the ratio of self-supply of food. The result revealed that the some variables have (+) correlation, the some variables (-) correlation and the other variables no correlation with per capita GNP. If forecasting models are designed with these results, it will be helpful for national health and nutrition, food balance and disease prevention.

• 한국과학교육학회지
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• 제22권2호
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• pp.252-260
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• 2002

끓는점 개념에 관련된 변칙 사례를 제시했을 때 변칙 사례에 대한 학생들의 반응 유형을 알아보고 학습자의 인지적 수준(장의존독립성, 논리적 사고력)에 따른 인지 갈등 유발 정도 및 개념 변화를 조사하였다. 초등학교 6학년 학생 137명을 대상으로 장의존독립성 검사, 논리적 사고력 검사, 선개념 검사, 변칙사례에 대한 반응 검사를 실시하였고, 초기 이론과 일치하는 선개념을 가진 90명 의 학생들만을 선택하였다. 과학 개념 학습 후 학생들의 개념 변화를 조사하였다. 변칙 사례에 대한 반응 유형은 거부, 재해석, 배제, 판단 불가, 신념 감소, 이론 변화 등 6가지였으나, 대부분의 반응 유형은 거부 (33%)와 이론 변화(39%)인 것으로 나타났다. Mann-Whitney U 검증결과, 학습자가 장독립작일수록, 논리적 사고력이 높을수록 변칙 사례에 의해 인지 갈등이 많이 유발되며 개념 변화를 효과적으로 일으키는 것으로 나타났다.

• 대한수학회지
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• 제50권1호
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• pp.81-93
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• 2013

We consider a distributed optimal flux control problem: finding the potential of which gradient approximates the target vector field under an elliptic constraint. Introducing the Lagrange multiplier and a change of variables the Euler-Lagrange equation turns into a coupled equation of an elliptic equation and a reaction diffusion equation. The change of variables reduces iteration steps dramatically when the Gauss-Seidel iteration is considered as a solution method. For the elliptic equation solver we consider the Cell Boundary Element (CBE) method, which is the finite element type flux preserving methods.

• 가정과삶의질연구
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• 제17권4호
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• pp.87-98
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• 1999

The purposes of this study were to examine wives' subjective perception about recovery degree of household consumption level after-before IMF and it's influencing variables. The data used were obtained from 250wives in Seoul. Statistics performed for the analysis were Frequency Percentile Means t-test Multiple Regression Analysis. The major findings were as follows; First household consumption level after IMF was lower than before IMF household-wives had little perception of recovery for economics. Second the difference of household consumption level after-before IMF was affected by income income-change The higher income and income-change were the higher difference of consumption level-after-before IMF was. Third the consumption level after IMF as affected by age income assets. The higher age income and assets were the higher consumption level after IMF was.

• 지역사회간호학회지
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• 제23권3호
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• pp.316-326
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• 2012

Purpose: This study was to identify the factors associated with stages of exercise behavior change of residents in a community on the basis of the Transtheoretical Model. Methods: Data were collected from 520 residents of a community using a self-report questionnaire. The survey variables comprised the stages of exercise behavior change, the process of change, decisional balance and self efficacy. Results: There were significant differences in the process of change, decisional balance and self efficacy by the stages of exercise behavior change. The factors associated with transition from pre-contemplation to contemplation were consciousness raising and self efficacy; regarding those from contemplation to preparation, cons of the decisional balance and social liberation; regarding those from preparation to action, dramatic relief and counter conditioning; regarding that from action to maintenance, cons of the decisional balance. Conclusion: TTM would be applicable to explain the exercise behavior of some residents in a community, which suggested that the programs for improving exercise behavior of residents in a community need to be developed.