• 한국항해항만학회지
• /
• 제27권3호
• /
• pp.329-333
• /
• 2003

Study of the background and state of Osaka's waterfront space development and analysis of the functions of 22 chosen major facilities of development project reveals the following four types: amenity-oriented development, large-scale synthesis type development, renewal compound area type development, exchange communication promotion type development. Osaka bay area has served primely as the base of harbors, industry and energy, while analysis of the ongoing project has found that the city has been making a functional transition to a type of development to live up to the needs of the times, suggesting that is wise that Korea's future direction of waterfront development be oriented toward environmental-friendly development by taking advantage of low-density area's natural resources. Given the plurality and complexity of the law of coastal zone, what is needed is a legal maintenance for coastal zone's clear-cut coordinating function and for environmental-friendly development with the limitations of seaside and coastal functions in mind.

• 한국산학기술학회:학술대회논문집
• /
• 한국산학기술학회 2009년도 춘계학술발표논문집
• /
• pp.645-648
• /
• 2009

본 논문에서는 신재생에너지 활용을 위한 휴대용 하이브리드 태양광 풍력 발전 시스템을 제안한다. 제안하는 태양광 풍력 복합 발전 시스템을 상용전기와 연계하여 사용할 경우를 고려하여 중대형 풍력 발전 시스템용 인버터와는 다른 특성이 요구되는 소형풍력 발전 시스템용 인버터와 독립형으로의 사용을 위해 축전지 충방전 컨트롤러를 개발한다. 20W의 Solar Power, 50W의 Wind Power, 1개의 Radio-recorder, 2개의 DC 7W/9W lamp. 축전지 Controller, 24H/40AH Maintenance-free battery 사양을 갖는 발전 시스템을 제작하고 필드 테스트를 통하여 성능을 검증한다.

• 상하수도학회지
• /
• 제27권3호
• /
• pp.395-404
• /
• 2013

The risk of pipe-bursting in multi-regional transmission mains consisting of 89 % of singled pipeline is so high that pipeline stabilization project is required such as renewal and replacement, pipe paralleling, emergency ties. Pipeline stabilization projects could be postponed at the step of initial decision-making because effect of this project is intangible benefit like activation of economic, improvement of welfare related to water. This study is to suggest quantified economical feasibility model for intangible benefit presumption to solve above problem. Cost reduction of emergency water supply, leakage, burst restore and energy efficiency improvement was altered and applied. As a result of economic analysis taking into account estimated benefit and cost under discount rate 5.5 %, service life 40 years, sufficient economic feasibility analyzed with B/C 2.45, NPV 317,700 million won, IRR 9.09 %.

• 한국산업융합학회 논문집
• /
• 제13권2호
• /
• pp.69-75
• /
• 2010

This paper describes the design and implementation of hybrid sun tracking solar power generation system designed by combining astronomical data with optical tracking mechanism. The advantages of proposed power generation system are small amounts of calculation for tracking operations and enhancement of 40% of power generation at best. This system is able to track toward optimal position for maximum sun-lights under scattered lights due to clouds. The performance of implemented power generation system is confirmed by field experiments.

• 전기학회논문지P
• /
• 제67권4호
• /
• pp.175-182
• /
• 2018

In recent years, micro-grid has been widely focused on the fields of renewal energy systems. This paper proposes a novel robust power converter control against arbitrary electric load changes for islanded micro-grid topology. First, we provide a state-space representation of our micro-grid model including power converter and electric load circuit. And then a state feedback control method is applied to construct a nominal control framework. Next, we propose a robust adaptive control law to enhance a control performance against unexpected load perturbation. In addition, we analytically investigate a passivity property for the micro-grid model and carry out computer simulation to demonstrate superiority and reliability of the proposed control methodology.

• 설비공학논문집
• /
• 제17권5호
• /
• pp.452-458
• /
• 2005

In Korea, pumping pipe using gravity way by water is most popular method in drainage system. But, it is difficult to repair a drainpipe in this method because the drain pipe diameter is increased as using this method. In this research, we propose a new drainage system. The system aim for an adaptedness with buildings, freedom of plan, construction and renewal in water pipe equipments, etc. The new system is not need of incline of piping, and it uses drainage power that is changed potential energy by high velocity flow as making Siphonage at vertical pipe. Therefore, the diameter of piping can decreased than existing piping system established in the ceiling. Also because connecting position will be located at the lower part, it is changed the potential energy of drainage to the high velocity flow. In addition, drainage will be smooth because the fixture drain is linked by each drain pipes.

• 농촌계획
• /
• 제20권1호
• /
• pp.115-125
• /
• 2014

Rural villages have many problems such as the collapse of rural village communities with continued over-depopulation and aging, reduced functions of towns and villages, deteriorated services with changes in the structure of settlement class and decreased use of the facilities. they also have difficulties in maintenance in spite of the increase of the roles of rural village community facilities. Various plans for the utilization of community facilities to promote the vitality of rural villages and the revitalization of communities have been needed. Thus, this study aimed to offer basic data to seek for future plans to utilize community facilities and reconstruct communities through an analysis of the current uses of energy and community facilities in rural villages. The results indicated that the consumption of petroleum was highest in mountain villages at an average of 187,475 won/month($137{\ell}$), followed by fishing villages at an average of 144,142 won/month($104{\ell}$) and rural villages at an average of 126,070 won/month($93{\ell}$). The rate of utilization of community facilities was reversely highest in rural villages at 84.3%, followed by fishing villages at 61.1% and mountain villages at 40.7%. This research also found that households saved energy when they used community facilities and areas with a high rate of utilization of community facilities at a lower average temperature in winter. It saved approximately 33% energy compared to other areas. Finally, efficient and economical methods for community facilities in villages to be newly developed and the remodeling of existing facilities should been needed in the future to contribute to reconstructing rural village communities that face a crisis of maintenance or abolition.

• 대순사상논총
• /
• 제29집
• /
• pp.1-36
• /
• 2017

본 연구는 대순사상의 참동학 위상정립을 위한 미래관 연구를 목적으로 한다. 참동학은 '수운의 사후 구천상제를 믿음으로 말미암아 참생명·참생각·참생활의 미래상을 구현하여 세상복록과 선경복락을 함께 누리는 새 동학'을 말한다. 역사적으로 동학의 시천주와 대순의 천지공사는 상관연동으로 참생명 밝힘의 대순기화 전망을 나타냈고, 동학의 양천주와 대순의 시학시법은 상관연동으로 참생각 밝힘의 대순이화 전망을 드러냈으며, 동학의 인내천과 대순의 천운구인은 상관연동으로 참생활 밝힘의 대순실화 전망을 구현하였다. 본 연구는 동학사상과 대순사상 관련문헌을 분석하는 문헌조사 방법과 영성(Spirit)과 마음(Mind)의 상통에서 드러난 대순사상 참동학의 미래전망을 모색하고자 생명철학 생성론 방법을 활용하고자 한다. 대순사상 참동학의 미래전망은 생명(生命)·생각(生覺)·생활(生活)의 삼차연동으로 이루어진다. 사람사이를 이어주고 매개하는 '대순진리의 공공(公共)하는 영성(靈性)'은 세 양상으로 드러난다. 먼저 구천상제 믿음의 '활명개신(活命開新)'에 의한 '참생명 밝힘'의 대순기화 전망, 구천상제·개체생명의 상관연동성을 깨닫는 '무심개신(無心開新)'에 의한 '참생각 밝힘'의 대순이화 전망, 일상생활 변화의 '지성개신(至誠開新)'에 의한 참생활 밝힘의 대순실화 전망으로 집약된다. 참동학은 수운을 대신한 구천상제의 인신강세와 구천상제 강세지에 해당하는 남조선 중심 세계구원이 공공차원으로 작동하여 새 밝힘을 이룬다. 대순기화는 천지공사로서 '영혼의 영토화'를 기화차원에서 치유하고, 대순이화는 시학시법으로 '영혼의 식민지화'를 이화차원에서 치유하며, 대순실화는 천운구인으로 '영혼의 사물화'를 실화차원에서 치유하기에, '대순진리의 공공하는 영성'은 삼차원 상관연동으로 미래전망을 밝힌다. 결국 삼차원 상관연동의 영성치유를 통해 참동학은 자타(自他) 사이의 원한·원망·원증을 공공으로 치유하며 상생사회로 발전시킨다. 참동학은 대순종통의 계승자, 정산(鼎山)·우당(牛堂)에 의해 계승되어 삼차연동을 구현했다. 한민족과 인류미래를 향한 위대한 세계시민성 선언은 '만국활계남조선' 선언으로 나타났으며, 개체생명과 구천상제, 우주생명과 상관연동으로 생명·생각·생활의 유기체를 이루어 미래전망을 밝힌다. 생명과학 인식론에서는 생명을 '물(物=대상·객체·실체)'로 관찰·분석·조작(操作)'한다면, 생명철학 생성론에서는 생명을 '사(事=주체적으로 자각·각성·체인하는 사건·사태·동태)'로 체득한다. 이 글에서는 생명철학 생성론 관점에서 대순사상의 참동학을 규명함으로써 개체생명과 구천상제의 우주생명이 함께·더불어·서로서로를 열어 삼차연동으로 개신(開新)하는 미래전망의 새 밝힘을 다루고자 한다. 대순사상의 참동학은 '공공하는 영성'을 생명지(生命知)·체험지(體驗知)·실천지(實踐知)의 삼차연동으로 작동시킴으로 고품격의 영성을 구현할 뿐만 아니라 영성작용의 충실도를 높여 보다 넓고 보다 깊게 미래지향의 전망으로 거듭나게 한다.

• KIEAE Journal
• /
• 제12권4호
• /
• pp.3-12
• /
• 2012

Nowadays, interests on Eco-city planning as Solution for problems of energy demand and environmental change has grown. so Eco-city planning became a major political topic for urban planning and urban design in many advanced nation cities. The purpose of this study is to find out the organized characteristics of Eco-City planning by analyzing successful overseas case where wasted historic port area in city is are regenerated with a environment-friendly concept for Eco-City "HafenCity". It is located on Hamburg-mitte in Hamburg, Germany and is currently the largest construction project in Europe. HafenCity as Home to about 12,000 and the workplace of 40,000 people is being created to accommodate a variety of uses including residential buildings, business, office and retail space as well as cultural and leisure facilities. First of all, HafenCity impresses because of its size as well as because of its Urban planning for eco-city. It presents the excellent change from wasted historic port to the ecological urban space.

• 대한기계학회논문집A
• /
• 제24권8호
• /
• pp.2083-2090
• /
• 2000

In order to manage nuclear power plants safely and cost effectively, it is necessary to develop integrity evaluation methodologies for the main components. Recently, the integrity evaluation techniques were broadly studied regarding the license renewal of nuclear power plants which were approaching their design lives. Since the integrity evaluation process requires special knowledges and complicated calculation procedures, it has been allowed only to experts in the specified area. In this paper, an integrity evaluation system for reactor pressure vessel was developed. RVIES(Reactor Vessel Integrity Evaluation System) provides four specific integrity evaluation procedures covering PTS(Pressurized Thermal Shock) analysis, P-T(Pressure-Temperature) limit curve generation, USE(Upper Shelf Energy) analysis and Fatigue analysis. Each module was verified by comparing with published results.