• Journal of Power Electronics
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• 제15권4호
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• pp.886-898
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• 2015

The design feasibility of a micro unidirectional DC transmission system based on an input-parallel output-parallel (IPOP) converter is analyzed in this paper. The system consists of two subsystems: an input-parallel output-series (IPOS) subsystem to step up the DC link voltage, and an input-series output-parallel (ISOP) subsystem to step down the output voltage. The two systems are connected through a transmission line. The challenge of the delay caused by the communication in the control system is addressed by introducing a ring communication structure, and its influence on the control system is analyzed to ensure the feasibility and required performance of the converter system under practical circumstances. Simulation and experiment results are presented to verify the effectiveness of the proposed design.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.863-868
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• 2008

In accordance with the guidelines on the balcony structure changes in December 2005, most of tenants were moving into apartment housing, expand the balcony, but some large deviation between the price construction costs set of cases, due to overuse and the cause of the dispute, and the housing law amended in 2007 due to price cap system is implemented, the cost of expansion the balcony overdose pointed out that there is set to boost the sale price has been raised. These issues in order to improve the government in January 2008, the "Note costs by the balcony expansion" suggested guidelines to protect the rights of tenants and wants to promote the settlement of the sale price cap system. This study calculated the "Note costs by the balcony expansion" window system based on double or single, high performance insulation window system of the quantitative performance analysis of each type window that purpose.

• 대한기계학회논문집A
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• 제29권1호
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• pp.124-131
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• 2005

BOM(Bill of Materials) is a list or description of raw materials, parts and assemblies that define a product. Although it is very important for maintenance information system of urban transit, it has problems that the size of database, inaccuracy and the flexibility which is measured as the number of updating records in accordance with added new product or engineering change. To solve these, we divide BOM to a master BOM and various function BOM constructed from the master BOM. That is the component based BOM management system, which is mutually independent and integrated efficiently using component technology. Consequently, after defining the component based master BOM, it is easy to manage the data structure, even restruct, in case there is a need for change of environment or data.

• 토지주택연구
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• 제12권4호
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• pp.15-30
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• 2021

중남미 및 카리브해(LAC) 지역에서 한국의 도시개발협력이 점차 확대되고 있지만 이와 관련된 국내의 시장 참여 전략은 미흡한 실정이다. 본 논문에서는 콜롬비아의 도시계획체계, 도시개발사업, 한국의 협력사업을 분석하고 중남미 도시개발사업 협력을 위해 고려해야 할 사항을 도출하였다. 연구 방법은 먼저 콜롬비아의 주요 도시인 보고타(Bogotá)와 메데진(Medellín)의 국가 및 지역 도시 계획 시스템을 비교하고 시사점을 도출하였다. 둘째, 콜롬비아의 토지구획정리사업, 대규모 공공임대주택 공급을 위한 마크로프로젝트, 한국과 콜롬비아의 도시개발협력 사례를 분석하고 시사점을 도출하였다. 연구 결과 한국의 도시개발 협력사업시 과제로는 첫째, ODA를 통한 원조사업은 투자형 개발사업과 같이 사업화로 연결시키기 보다는 향후 본사업을 위한 콜롬비아의 도시 네트워크 형성에 주력하는 것이다. 둘째, 인프라사업과는 다른 도시개발 협력사업의 재원조달구조를 파악하는 것이 필요하다. 셋째, 해외의 개발사업인 만큼 개발 기간 및 규모를 단지급 규모이하의 적정 규모로 설계하여 성공사례를 만드는 것이 필요한 것으로 나타났다.

• 토지주택연구
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• 제13권2호
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• pp.1-15
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• 2022

본 연구에서는 쿠웨이트 신도시 건설 이후 도시관리 분야로의 진출전략을 수립하기 위해 쿠웨이트의 도시 및 주택관리 현황을 살펴보았다. 또한, 도시인프라 및 주택관리와 관련된 법제도와 거버넌스를 검토하였으며, 국내외 사례조사를 통해 시사점을 도출하였다. 이를 통해 쿠웨이트 신도시 도시관리 부문에 진출하기 위해 전제되어야 하는 현지 제도개선 사항과 함께 도시인프라 및 주택관리를 위한 거버넌스 구성방안을 제안하였다. 한국의 공동주택관리법과 유사한 수준의 법제도 확립을 제도개선의 핵심사안으로 판단하고, 현지 여건을 고려하여 의무관리대상 주택의 범위와 관리방법을 핵심으로 하는 '(가칭)주택관리법'을 제안하였다. 본 연구에서 제시한 공동주택 관리범위와 추진체계 등 진출방향은 중동의 유사 국가에서도 도시 및 주택관리 부문 진출시 기초자료로 활용될 수 있을 것이다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.171-176
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• 2010

Railway has recently played an important role in preventing global warming caused by green house gases and furthering a low carbon green growth, The various railway research centers have conducted facilitated studies on saving energy. In particular, urban railway has emerged as the best means of public transportation in terms of punctuality, safety and environmentally friendliness. There are various ways to save energy in terms of operation of urban railway system, and they can be generally divided into hardware aspects that pertain to structure of vehicles and development of control system and software aspects that pertain to effective operation of trains based on operation patterns and diagram control. In this paper, we investigated drive assistance system for railway energy efficiency. The railway operation patterns and train diagram management programs were researched.

• 한국농촌건축학회논문집
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• 제23권4호
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• pp.55-62
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• 2021

This study conducted a management system and business analysis related to urban and architecture in local small and medium cities. The current status of the management department of the master plans, which were established based on the laws related to the spatial environment and implemented projects based on them, was analyzed, and the problems were derived. The basic urban master plan of the local government is classified as a hierarchical higher plan than other plans established within the same city, but there was a problem in that the timing of each plan was different. As a problem, the contents of the sub-plan were not included in the upper plan, or the opposite phenomenon occurred. In addition, the management entity of the master plan and sub-projects was different. To solve this problem, it is necessary to form a consistent structure of systematic planning and management subjects. In addition, in the future planning stage, it is necessary to establish a master plan establishment system according to hierarchies. This study is meaningful in that it can be used to establish a master plan establishment system according to hierarchy in the future planning stage and to establish the same management entity as the master plan in the projects stage.

• 한국BIM학회 논문집
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• 제3권1호
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• pp.11-20
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• 2013

Mix-used development in urban renewal project is done to effectively utilize the limited downtown. Generally unlike a single project, It features placing a large number of different facilities(residential, commercial, business, cultural, etc.) which is each other organically linked. The purpose of this study is to suggest the method of modeling guide for 3D preliminary cost estimation considering visual and intuitive judgement of space in mix-used development Urban Renewal project. In this research, introducing SME(Standard Module and Element) breakdown structure, FID(Finish Identity) for estimating building space unit-based quantity take off was implemented. It could narrow the discrepancy of opinion between the stakeholders with more accurate cost-estimates, comparing to the traditional methods.

• 국토계획
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• 제53권7호
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• pp.67-86
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• 2018

This paper attempted to analyze impacts of transition in electricity generation system on a national economy and environmental level in Korea using a recursive computable general equilibrium(CGE) model. In particular, the paper presented a hybrid model combining the top-down CGE model with the bottom-up model which describes the structure of electricity production in detail. The impacts were analyzed by two policy scenarios base on the basic plan for electricity supply and demand proposed by the Korean government. As a result, the paper specifically showed that there exists a trade-off relationship in the policy-making between economic efficiency and environmental level. The paper also suggested that the transition in electricity generation system should be done more gradually and carefully.

• Ecology and Resilient Infrastructure
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• 제2권4호
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• pp.296-304
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• 2015

급속한 기후변화에 따른 자연재해의 증가와 재해 규모의 대형화 및 다양화는 근본적인 해결 방안을 요구하고 있다. 특히 도시 공간은 도시 인구의 증가 현상과 불투수층의 기반시설에 기초하여 재해의 피해와 대응에 대한 복합적 대책을 수립해야 하는 실정이다. 이에 공공 공간인 도시의 녹색공간을 활용하여 방재공간을 확보하고, 재해저감형 공원시스템을 도입함으로써 토지 매입의 경제적 문제와 방재시스템의 문제를 동시에 해결할 수 있다. 각 지자체는 최근 발표된 국토교통부의 가이드라인을 통해 재해저감 유형별 시스템과 선도 사업을 선정하여 진행 중에 있다. 본 연구의 목적은 도시민의 생활 건강과 행복의 녹색 공간인 도보권 근린공원을 대상으로 도시의 물 관리와 소생태계 보전을 함께 갖추는 도시 녹지 공간을 방재형 근린공원의 조성 모델로 제시하는데 있다. 이를 통해 추후 기존 도시 구조 내 생활권 근린공원의 기후변화 적응 모델로 활용하는데 기여하고자 한다.