• 한국노년학
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• 제39권4호
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• pp.763-780
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• 2019

본 연구는 중장년층의 경제적 노후불안이 문제음주에 영향을 미치는지 분석하고 사회적 지지의 조절효과를 검증하는 것이 목적이다. 이를 위해 중장년층의 경제적 노후불안, 사회적 지지, 문제음주 간의 관계를 이론적 내용에 근거하여 설명하고 있다. 그리고 2015년 한국사회의 사회·심리적 불안 실태조사 자료를 토대로 주요 변수 간의 관계를 검증하고자 평균중심화한 상호작용항을 투입하여 위계적 회귀분석을 실시하였다. 분석결과, 중장년층의 경제적 노후불안이 높을수록 문제음주 수준이 높아지는 것으로 나타났고 경제적 노후불안과 문제음주 간의 관계에서 사회적 지지의 조절효과를 파악하였다. 이러한 연구결과를 통하여 문제음주를 낮출 수 있도록 지원하는 중장년층을 위한 예방적 방안을 강조하였다. 중장년층의 경제적 노후준비에 도움이 되는 교육 확대 및 사업의 방향을 제시하였고 그들의 사회적 지지를 위한 상담 및 커뮤니티 프로그램의 중요성을 언급하였다. 끝으로 중장년층의 생애설계를 논하면서 본 연구의 한계점 및 후속연구의 필요성을 제시하였다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
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• pp.947-951
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• 2005

The concept of group technology has been successfully applied to many production systems including flexible manufacturing systems. In this paper we apply group technology principles to the economic lot scheduling problem which has been intensively studied over 40 years. We obtain a production schedule of several family products on a single facility where setup times and costs can be reduced by using the concept of group technology. We develop a heuristic algorithm and a hybrid genetic algorithm for the group technology economic lot scheduling problem (GT-ELSP). Numerical example shows that the developed heuristic and the hybrid genetic algorithm outperform the existing heuristics.

• 한국항만경제학회:학술대회논문집
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• 한국항만경제학회 2007년도 국제학술대회 및 정기총회
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• pp.161-173
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• 2007

This paper considers the problem of determining the cargo flow and the transportation mode in each trade route while satisfying the demand. Especially, the problem incorporates short sea shipping in Korea, which is becoming more important in order to improve efficiency of Logistics. The objective is to minimize the sum of shipping and inland transportation costs. To solve optimally the problem, this paper employs a linear programming model, which is an operations research technique for optimization. The problem is formulated by extending the well-known network design problem by considering capacity at seaport and limitation of total number of vehicles. The model is solved using CPLEX, a commercial linear program software. The test results using a real cargo flow data in Korea show that the model represents closely the real situation.

• Journal of Advanced Marine Engineering and Technology
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• 제33권3호
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• pp.403-410
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• 2009

The aim of this research is to develop the Bees Algorithm named 'the dynamic allocated Bees Algorithm' for multi-objective problem, especially in order to be suit for Pareto optimality. In addition two new neighbourhood search methods have been developed to produce enhanced solutions for a multi-objective problem named 'random selection neighbourhood search' and 'weighted sum neighbourhood search' and they were compared with the basic neighbourhood search in the dynamic allocated Bees Algorithm. They were successfully applied to an Environmental/Economic (electric power) dispatch (EED) problem and simulation results presented for the standard IEEE 30-bus system and they were compared to those obtained using other approaches. The comparison shows the superiority of the proposed dynamic allocated Bees Algorithms and confirms its suitability for solving the multi-objective EED problem.

• 보건교육건강증진학회지
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• 제21권3호
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• pp.67-86
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• 2004

This study attempted to investigate the factors influencing alcohol drinking habit of college students in Korea. To find how many students are alcohol dependents and what factors are related to problem drinking habit, the current study estimated problem drinkers and analyzed the relationship of problem drinking and various factors. In 2000, 736 students reported the questionnaires. Estimated rates of problem drinkers standardized by age were 0.7% of male and 0.5% of female students by NAST, amounting 9,300 college students. Age of initiation of alcohol drinking, alcohol or drug use problems of parents or mends, psychological factors, emotional factors, and two of MMPI scales were significantly different between moderate drinkers and alcohol dependents. The moderate and problem drinkers were significantly different in Mf and Pa average scores. However, economic factors were not significantly different between the moderate drinkers and alcohol dependents. Based on the results, this study suggested that further multivariate studies with large sample need be conducted to investigate the relationship between alcohol dependency and its factors.

• 대한가정학회지
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• 제35권3호
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• pp.151-169
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• 1997

The purpose of this study was to analyze contributing factors to elder's life problem and their life planning. The sample in this study consisted of 556 elderly husband and wives over 55 years old loving in Seoul, Daejeon, Jeonju and Daegu. Statistics employed for the analysis were frequencies, means, and multiple regression analysis. The results could be summarized as follows. Elderly's life problem and planning were negatively related in economic and leisure domain. And family relationship and self-esteem had significant effects on the perception of life problem, while hoe ownership, total income and total asset had not effect on perception of life problem of elderly. Also, family relationship, self-esteem and locus of control had effect on life planning of elderly. These findings pointed that psychological variables as family relationship and self-esteem play a more important role than economic variables in life of elderly.

• 한국인터넷방송통신학회논문지
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• 제15권6호
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• pp.257-266
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• 2015

비 볼록 발전비용함수에 대한 최적화 문제는 다항시간으로 해를 구하는 알고리즘이 알려져 있지 않아 전기분야에서는 부득이 2차 함수만을 사용하고 있다. 본 논문은 비 볼록 발전비용함수의 경제급전 최적화 문제에 대한 밸브지점 최적화 알고리즘을 제안하였다. 제안된 알고리즘은 초기 치로 최대 발전량 $P_i{\leftarrow}P_i^{max}$로 설정하고, 평균 발전단가가 $_{max}\bar{c}_i$인 발전기 i의 발전량을 밸브지점 $P_{ik}$로 감소시키는 방법을 적용하였다. 제안된 알고리즘을 13과 40-발전기 데이터에 적용한 결과 기존의 휴리스틱 알고리즘보다 좋은 성능을 보였다. 따라서 비 볼록 발전비용함수의 경제급전문제 최적 해는 각 발전기의 밸브지점 발전량으로 수렴함을 보였다.

• 지역사회간호학회지
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• 제27권2호
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• pp.173-182
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• 2016

Purpose: This study was conducted to survey female Vietnamese marriage immigrants' life stress and to analyze factors influencing their life stress and coping strategies. Methods: As descriptive correlation research, this study conducted a survey with 182 conveniently sampled subjects. Data were collected in June, 2015, and analyzed with descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and stepwise multiple regression. Results: The subjects' life stress levels were above average, and significantly varied according to their health, and economic status. Stress coping strategies used by the subjects included assistance seeking, problem avoidance, wishful thinking, problem solving, and emotional alleviation in the order of frequency. As a result of the stepwise multiple regression, economic level, economic activity, and health status were found to be the most significant factors influencing the subjects' life stress, and these variables explained 45.1% of the variation in life stress. Conclusion: Female marriage immigrants were experiencing above-average life stress, and they were coping with it mainly in terms of assistance seeking or problem avoidance. In order to mitigate their stress, therefore, it is necessary to provide extended employment opportunities and economic activities for them so that they can cultivate their abilities in health management.

• 농촌계획
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• 제10권1호
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• pp.1-7
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• 2004

There are recently many studies on evaluating the economic value of multi-functionality of rural areas. However, the regional difference of economic value leads a problem of different evaluation on its economic value for each region in its application to government policy. This problem causes an increase in cost because it creates restriction in policy decisions which put their importance on the time of their execution. This study investigates the propriety of value transfer using Meta Analysis after evaluating the social and cultural value of rural areas among their functions based on CVM model. It finds that the regional difference in the willingness to pay is 0.13% to 31.42%.

• 대한전기학회논문지:전력기술부문A
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• 제48권3호
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• pp.203-211
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• 1999

This paper presents a new approach on genetic on genetic algorithm to economic dispatch problem for valve point discontinuities. Proposed approach in this paper on genetic algorithms improves the performance to solve economic dispatch problem for valve point discontivuities through improved death penalty method, generation-apart elitism, atavism and sexual selection with sexual distinction. Numerical results on a test system consisting of 13 thermal units show that the proposed approach is faster, more robust and powerful than conventional genetic algorithms.