• 전기학회논문지
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• 제60권3호
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• pp.500-508
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• 2011

In the distribution systems, the maximum power transportation capacity is restricted within 40MW based on two lines, because of the thermal current limit of a distribution line. Recently it has been continuously required to expand the abilities of the power transportation in distribution systems, as the number of large scale industrial complexes and distributed generations are growing. In this paper, we suggested the five alternatives combining two methods, laying the two bundle lines and adding another voltage between the 22.9kV and 154kV in distribution systems. This paper implemented the economic evaluations of proposed alternatives from national and customer perspectives. And then we compare the results with those of 154kV transmission system.

• 조명전기설비학회논문지
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• 제24권10호
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• pp.90-98
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• 2010

Microgrid is a small-scale power system composed of distributed generators, energy storage system and loads, and can operate in the grid-connected mode and the islanded mode. This paper presents optimal design procedures for remote microgrid. The design program is based on the economic evaluations including the feasibility study module, optimal combination and allocation of DERs, power network design and the reduction of the GHG emmission. This program which is suggested in this paper shows good performance as a tool of remote microgrid design.

• 한국항해항만학회지
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• 제29권9호
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• pp.813-819
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• 2005

The purpose of this paper is to present some main economic factors which influence Gaza Seaport. Without direct access to the international market, the Palestinian economy will continue its dependence on Israeli economy mainly in employment, transport facilitation, and international trade. The greatest potential for Palestinian economic growth lies in trade. The port is important for creating new job opportunities, and for enhancing exporting capabilities, which are the most essential elements for development of the Palestinian economy. Israeli policies and procedures incur Palestinian exporters additional transportation costs when delivering their products to Israeli Ports or when transit these products to neighboring countries through Israeli controlled area. The public profit for the port is greater than the private profit. Therefore, constructing the port will have a great effect on the Palestinian economy. There are many challenges facing the port, some of them are the political stability, the economies of scale, and Israeli security measures and procedures.

• 한국인구학
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• 제11권1호
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• pp.32-49
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• 1988

The social conditions in Koreas until 1950s were similar to the model phenomena of low level eqilibrium trap which was named by Prof. Nelson, with the continuation of high population growth rate and low economic growth rate. To escape from the trap, Korean government adopted two different policies, one is economic development plans and the other is family planning programs. Theses policies were successful in both increasing the national products and decreasing the population growth rate. In 1985 per capita GNP increased to over two thousand dollars, fertility rate reduced to replacement level(2.1) and unemployment rate was stabilized at 4 percent level. From various prospects, we were successfully escaped from the Malthusian trap and many economists, who studied developed countries, belive that population growth has positive effects on technological progress, economies of scale, specialization, individual attitude on work, and economic growth. Therefore we need to reexamine the anti-natalistic population policy of Korea in this situation.

• 대한수학회지
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• 제32권4호
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• pp.877-888
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• 1995

Many authors have utilized a Pareto distribution because of its wide applicability in socio-economic, physical and biological phenomena.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2009년도 추계학술대회 논문집
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• pp.148-150
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• 2009

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.1047-1052
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• 1989

A novel multi-purpose monitoring platform-LTA vehicle is presented with much improved kinetic performances together with its structural analysis and its scale model test data. This provides a useful mean of monitoring, exploring and remote sensing platform that flies over the wide range of atmosphere and can be used as a safe economic device.

• 가정과삶의질연구
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• 제20권4호
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• pp.197-206
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• 2002

The purpose of this study was to examine the effect of marital characteristics on the marital stability among the elderly couples. Each participant was measured using a scale for the concept of marriage, a scale for marital coherence, a marital stress scale, a coping behavior scale and a marital stability scale. Elderly people who have a living spouse and who are living In Seoul were recruited. The data from two hundred and forty participants over 60-years-old were used in the final analyses. Major findings are as follows First, demographic factors such as educational level, health, economic status, the main source of income, and employment status appeared to significantly predict the elderly folks'marital stability Second, gender seems to be a factor In elderly couples'experience of marital stability. Husbands perceived marital stability to be higher than wives did. Third, the perception of marital stress, positive coping behavior and marital coherence influence the marital stability of the elderly couples. That is, the less elderly couples perceived marital stress and the less they relied on negative coping behaviors, the higher they perceived marital stability. These results imply that a healthful coping behavior to marital stress is important in enhancing marital stability for elderly couples.

• 가정과삶의질연구
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• 제31권4호
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• pp.113-129
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• 2013

The purpose of this study was to develop and validate the Korea Family Strengths Scale II (KFSS-II) which was modified and developed by Yoo(2004). For this purpose, the preliminary scale of family strengths which was based on Yoo(2004)'s sample survey that targeted 494 adults who live in Korea consisted of 30 items. Exploratory factor analysis of 29 items extracted 5 factors. It included the 5 dimensional constructs of family resilience, valuing each other & acceptance, qualitative bonding, economic stability and cooperation and caring about community. Confirmatory factor analysis confirmed the stepwise 5-factor model of 22 items considering family strengths. These results indicated that the simple template of Family Strengths Scale would be a concise and reliable tool for assessing and evaluating a family's strengths.

• 사회복지연구
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• 제40권2호
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• pp.123-143
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• 2009

암 환자를 돌보는 가족은 큰 생활의 변화와 부담을 겪으며, 그 안에서 긍정적 경험과 성장을 보고하기도 한다. 본 연구는 암 환자 가족을 대상으로 한국어판 외상 후 성장(K-PTGI) 척도를 사용하기 위하여 도구의 신뢰도와 타당도를 검증하였다. 도구의 신뢰도 검증을 위해 Cronbach α를 구하였으며, 수렴판별, 기준 타당도 검증을 위하여 긍정적 적응, 일상생활 방해, 돌봄부담감, 경제적 부담, 사회적지지, 종교여부와 상관관계를 분석하였다. 분석결과 K-PTGI는 암 환자 가족의 외상 후 성장을 평가하는 타당한 도구인 것으로 나타났으며 이 결과는 암 환자를 돌보는 가족을 이해하기 위한 임상적 연구의 기초로 활용할 수 있을 것이다.