• 한국전자파학회논문지
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• 제23권1호
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• pp.1-13
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• 2012

능동 위상 배열레이더(AESA radar: Active Electronically Scanned Array radar)는 전자적으로 빔을 조향함으로써 빔 조향 시간이 비약적으로 빨라져, 기존의 기계식 빔 조향 레이더에 비해 레이더에서 수행할 수 있는 다중 임무처리 능력이 크게 향상되었다. 이러한 다중 임무 처리 능력을 최대화하면서 레이더의 전체 성능을 향상하기 위해, 레이더에 주어진 시간, 에너지, 처리 능력 등의 한정된 자원을 실시간으로 효율적으로 관리, 운용할 수 있는 레이더 자원 관리 기술의 중요성이 크게 대두되었다. 그 중 레이더 빔 스케줄링 기술은 레이더 자원 관리의 핵심적인 요소라 할 수 있다. 본 논문에서는 레이더 빔 스케줄링을 위한 다양한 dispatching rule을 비교 분석하고, 특히 빔의 처리 시간 지연 정도에 따라 SPF(Shortest Processing time First)와 ERF(Earliest Request time First)를 차등적으로 적용하여 빔의 우선 순위를 정하는 dispatching rule을 제안, 그 성능의 우월성을 입증하였다.

• 한국환경복원기술학회지
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• 제21권3호
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• pp.27-45
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• 2018

Both the national land plan and the environmental plan reflect the need for sustainable land use and management. However, the linkage between the plans is reduced due to the lack of integrated management. Therefore, this study developed indicators to achieve integrated management. A total of 59 environmental plans were reviewed for the development of indicators, and a total of 74 integrated management indicators were derived through a three-stage process. In this process, the relevance of the integrated management indicators of this study to the UN 's sustainable development goals (SDGs) is presented in order to derive indicators that meet the level of international consultation. In order to facilitate the utilization of the indicators, the final indicators are divided into seven areas: natural ecology, water resource and quality, urban and green space, atmospheric, energy, landscape, resource circulation and waste. Furthermore, the indicators were classified into national, regional, and city level. Accordingly, the final indicator can be adapted to the field of influence of the planned to be established, and the indicator can be selected and applied to the level of the plan. The final indicators can be used to examine the extent to which the national plan reflects the contents of the environmental plan and can be used as an aid to confirm the contents to be included in the plan when establishing a new national plan.

• 한국해양환경ㆍ에너지학회지
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• 제5권2호
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• pp.28-34
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• 2002

본 연구는 수거된 해양폐기물을 원료로 이용하여 폐기물연료(RDF : Refuse Derived Fuel)를 제조하는 공정 개발을 목적으로 하고 있으며, 산업용 연료로서의 활용 가능성을 확인하기 제조된 RDF의 물성분석을 분석하였다. 해양폐기물은 로우프에서의 납제거와 파쇄 그리고 해저 슬러지의 세척과 같은 전처리, 그리고 가연성분의 입자화 공정을 통하여 해양폐기물이 에너지로 변환하는 것이 가능하게 되었다. 이와 같은 해양폐기물 자원화 공정은 수거 폐기물의 환경적 처리는 물론 대체에너지 확보의 측면에서 매우 유익한 것으로 사료된다.

• 한국수소및신에너지학회논문집
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• 제19권1호
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• pp.1-9
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• 2008

Human has faced in lack of fossil fuel and environmental crisis because of high population growth and development of industry. Hydrogen, unlimited amount and clean resource from water electrolysis, is remarkably known as the solution of recent energy crisis. One of the special characteristics of hydrogen is that a little amount of catalytic such as platinum and palladium makes nonflammable combustion, in other words catalyst combustion. Catalytic combustion fueled by hydrogen is environmentally friendly. This paper considers some comparisons of characteristic of catalytic combustion between a single layer of platinum catalyst, double layer of platinum and nickel catalysts and mixture of platinum and nickel catalysts. Some experiments of temperature distribution at different positions and characteristic of combustion in low temperature region were done in order to find an applicable possibility as a house-cooking burner.

• 한국조경학회지
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• 제18권2호
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• pp.111-125
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• 1990

Korea is a nation with poor natural resources. There is a greats need to save resources that are running out in fast face. The purpose of this thesis is to bind the means to save rosources in housing site, especially in highrise apartment. The reason why the high-rise apartments are chosen as a case is 7hat the high-rise is becoming the major form of dwelling in most urban areas. As a tool of saving the ecological way is chosen because ecological energy is free, clean and unlimited. The resources to be saved are divided into two categories, namely energy and non - energy resources as water, land and food. The contents of the thesis are comprised of 4 chapters. The early chaspters are devoted to the understanding of the ecosystem and problems of current energy consumption in the apartment. It is fellowed by the introduction of the hypothesis that can possibly save reouruces. The hypothesis are then transformed into the actual theories through verification, to be established as the new techniques of the site planning. The ecosystem is the functional relationship between the living organisms and their physical surroundings. The living organisms are the plants that produce, animals that consume and bacterias that decompose. They live in the environment which consists of the three worlds of atmosphere, hydrosphere and lithosphere. The whole system is activated by the solar energy that turns the inorganic mallet- into the living organism and back to the inorganic. It is the recycling principle of the ecosystem. The elements of ecosystem that fan be unilimited as the tools of resources -saving are the sun, wind, water, soil, plant and waste. They are unlimited sources of energy. free of pollution and cheap in price. Each of these ecological elements Provide the opportunities that can save the heating fuel, air conditioning energy, water resource, land and food. The ecological approch should be pursued actively in this age of short resources and growing pollution. In the scale of total energy consumption the housing takes the second position next to the industrial use. It is followed by the transportation which shows for less consumption than former two.

• 한국해안·해양공학회논문집
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• 제23권6호
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• pp.489-495
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• 2011

해양에너지는 무궁무진한 부존량을 지니고 있으며 2차적인 환경문제를 야기 시키는 위험성이 상대적으로 작기 때문에 더욱 기대가 모아지고 있다. 우리나라의 서해안은 조수간만의 차가 크기 때문에 해양에너지 중에서도 조력발전을 통한 대규모 신재생에너지 창출이 유리한 지역이다. 아울러 조력발전을 위한 발전소를 해상에 설치 할 경우, 댐 건설에 따른 교량효과, 관광자원효과 및 만내 하천범람을 조절효과 등 다목적의 개발 기대효과를 얻을 수 있다. 조력발전을 위해서는 외해 조석과 발전소 운전에 따른 조지수위 변화에 따라 결정되는 가용수두가 크고, 비교적 광역의 조지면적이 필요하다. 본 연구에서는 가용수두가 클 뿐만 아니라, 만입구가 좁고, 만내에 넓은 조지면적을 지닌 서해안에 위치한 가로림만에 조력발전소를 건설할 경우, 조력발전에 따른 효과를 예측하는데 있어서 필수적인 수리특성의 변화를 EFDC모델을 이용한 수치모형실험을 통해 검토하였다. 검토 결과, 조력발전 입지로서의 가로림만의 입지타당성을 확인하였으며, 대상지역은 창조시의 유속보다는 낙조시의 유속이 빠르기 때문에 낙조시 유속이 빠른 서측수로에 수차발전기를 설치하고 동측수로에 수문을 설치해야 하는 등의 설계 지견을 얻을 수 있었다.

• 전기학회논문지
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• 제59권1호
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• pp.26-32
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• 2010

This paper proposes a new effective installed reserve rate in order to evaluate reliability of power system considering renewable generators, which include uncertainty of resource supply. It is called EIRR(effective installed reserve rate) in this paper. It is developed with considering capacity credit based on ELCC by using LOLE reliability criterion. While the conventional installed reserve rate index yields over-evaluation reliability of renewable generators, the proposed EIRR describes actual effective installed reserve rate. However, it is not the probabilistic reliability index as like as LOLE or EENS but another deterministic effective reliability index. The proposed EIRR is able to evaluate the realistic contribution to the reliability level for power system considering wind turbine generators and solar cell generators with high uncertainty in resource supply. The case study in model system as like as Jeju power system size presents a possibility that the proposed EIRR can be used practically as a new deterministic reliability index for generation expansion planning or operational planning in future.

• 가족자원경영과 정책
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• 제17권3호
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• pp.59-79
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• 2013

The purpose of this study was to develop and validate a scale for the multidimensional assessment of work-family spillover in working couples with children. The subjects of this study were working wives and husbands with children in Daegu. Two surveys were administered, eliciting 243 respondents and 227 respondents, respectively. Then a series of tests were run to analyze the data, including item-to-total correlation, Cramer's V coefficients, item discrimination, Cronbach's ${\alpha}$, and exploratory and confirmatory factor analysis. The results yielded that, first, a preliminary 102 items were developed on the basis of the literature review, and this was narrowed down to 72 items selected with the help of experts. Through preliminary, primary and secondary survey analysis, the scale for the multidimensional assessment of work-family spillover was developed and validated, with a 36 items scale, 18 items for work to family spillover and 18 items for family to work spillover. Furthermore, the scale constructed three spillover processes - time interference, energy depletion, and psychological distraction - and consisted of four different domains of family life into which spillover occurs - namely marital relationship, parent-child relationship, leisure, and housework. The internal reliability was evaluated to show a confidence range of .85 ~.92 for each factor.

• 농촌계획
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• 제18권2호
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• pp.1-11
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• 2012

Eco-village has been regarded as an alternative to accomplish sustainable development for rural village. This study has intended to develop comprehensive planning indicators to establish an eco-village based on such aspects of sustainable development as economy, environment, and society. To reach this objective, this study has set up six goals as follows: 1) ecological production activities for agriculture, 2) resource circulation and energy independence in the economic domain; 3) building cultural and historical succession and community activation, and 4) living together with surrounding regions in social domain; and 5) maintaining environmental habitat, and 6) restoring natural ecosystem in environmental domain. Based on these goals, this study has developed the planning indicators to build an eco-village through case study, literature review, survey for suitability, and factor analysis. This study has found 17 strategies and 47 planning indicators in accordance with the six goals.

• 한국환경과학회지
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• 제9권6호
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• pp.449-454
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• 2000

Sustainable development has been the key concept, both in economic policies and in environmental management. On the basis of an systems ecology perspective, this suggests the sustainable development of Korea\`s natural environment and economic activity using the EMERGY evaluation. The total EMERGY use(7,730E20sej/yr) in Korea is 81 percent from imported sources, fuels and goods and services. The ratio of outside investment to attracting natural resources is already large, like other industrialized countries. Continued availability of purchased inputs at a favorable balance of EMERGY trade, currently about 2.85 to 1 net EMERGY, tis the basis for present economic activity and must decrease as the net EMERGY of purchased inputs including fossil fuels goes down. EMERGY yield ratio and environmental loading ratio were 1.23 and 20.30, respectively. The population level is already in excess of carrying capacity. Its carrying capacity for steady state on its renewable sources is only 2.2 million people, compared to 45.9 million in 1977. EMERGY sustainability index is therefore less than one, which is indicative of highly developed consumer oriented economies. Until now the development of a country has been achieved by the economic growth, but it can be sustained in the long run by the use of renewable resource systems. the efficiency of energy usage, and the transformation of the social-economic structure based on an ecological-recycling concept.