• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2001년도 학술대회 논문집
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• pp.48-49
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• 2001

Cryogenic technology is one of the key technologies for fusion reactor equipped with superconducting coil for plasma confinement. The KSTAR(Korea Superconducting Tokamak Advanced Research)Project is in progress since 1996. Major parameters of the KSTAR tokamak are : major radius 1.8m, minor radius 0.5m, toroidal field 3.5 Tesla and plasma current 2MA with a strongly shaped plasma cross-section and double -null diverter. Considering practical engineering constraints, the KSTAR device is designed for a pulse length of 300 sec in up-graded operation mode but in the initial configuration would provide a pulse length of 20 sec provided by the poloidal coil system in base-line operation mode. The cryogenic system is composed as follows : cold box, helium compressor system, distribution box, helium gas buffer tank, helium gas purifying system, gas recovery system, liquid helium storage dewar, current lead box, current bus line and liquid nitrogen storage tank.

• 태양에너지
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• 제16권2호
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• pp.7-14
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• 1996

Korean goverment is promoting "the Rural Electrification Project" to replace the diesel generators with PV power supply. The PV-diesel hybrid system are proven more cost effective than that of the existing, especially in the. case of small islands(less than 70 households). In this paper, we intend to introduce the Hahwado island PV system assisted with diesel generator and remote monitoring systems as observator. The purpose of this observator is to have minimum maintenance, to improve economical effciency and system reliability by checking the system periodically at certain time interval, and to make diagnosis of its operating situations. The remote monitoring system was designed to communicate between the central and local site through exclusive telephone line on real-time base, using Window '95 version.

• 한국실내디자인학회논문집
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• 제18호
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• pp.9-15
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• 1999

Computers and internet have the potential to radically development. But, computer is a just tool by itself. This study is control implement in a way that exploits the capacity of network of processors to execute many tasks concurrently in architectural desigv. The collaboration design system constituted integrated CAD (computer-aided design) system at the base of standardization database environment network and world wide web (WWW). Collaboration design management system is composed of Project Management, Part Management, Process Management , and Appraisement system. They can provide frameworks for effective coordination and management of design work in accordance with the Collaboration Design Support System operating rule accommodatingly. architectural data can be collaboration design environment accessible through a web browser and located at a server. whenever their work investigated each others. Throughout process, the database acted as an individual design and it made them available in realtime. And they can have quick overview of the work. That way a continuous evaluation of best design was distinctly and highly. In the future, New architectural design methods are collaboration environment could result in productivity and quality.

• 디지털융복합연구
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• 제16권10호
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• pp.79-87
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• 2018

본 연구에서는 <인생나눔교실> 사업 평가를 시행하기 위해 본 사업의 특성을 고려하여 평가지표를 설계하고 이를 사업평가 모형으로 제시하고자 하였다. 이를 위해 평가지표를 개발하고 AHP 분석을 통해 가중치를 설정하였고, 개발한 평가지표를 토대로 현장 평가를 진행하여 <인생나눔교실> 사업을 평가하였다. 그 결과 참여자 영향과 사업 내용의 적정성 지표가 20개의 지표 중에서 가장 높게 나타났다. 그리고 17년 5개 지역주관처의 현장평가를 실시한 결과, 탁월 및 우수 등급이 4개 기관, 보통 등급이 1개 기관으로 나타났다. 본 연구는 <인생나눔교실>의 사업평가 모형을 개발하여 평가를 체계적으로 시행할 수 있는 기반을 구축했다는 점에서 의의가 있다. 그러나 아직 피평가자의 수용성과 효용성에 대해서는 평가지표에 충분하게 담아내지 못했기 때문에 앞으로 이에 대한 보완이 필요하다. 또한 매년 평가 영역과 평가 지표의 가중치를 재설정하여 평가모형을 지속적으로 보완할 필요가 있다.

• KIEAE Journal
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• 제16권5호
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• pp.93-101
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• 2016

Purpose : This research aims to present policy plans for community vitality in the field of the urban regeneration project by analyzing aspects for vitality via domestic and abroad city policies and cases. Methods: The research method works as follows: The first step is 1) to introduce the concept of evaluation matrix to analyze cases of urban generation, 2) to apply to the proposed evaluation matrix, and then 3) to analyze communities' decline diagnosis, counterstrategies, and promotion process. And the second step is to draw features and evaluation of cases and to present the policy plan for communities' vitality with the urban regeneration project in South Korea via a comprehensive analysis. Result : This research confirmed the fact that when different sectors is expanded toward a mutual cooperation, communities are vitalized, having a mutual effect on other related sectors by taking a part in the community positively. Especially in the base of each characteristic and estimation, when various activities and socio-economic programs with residents are promoted in the integrated system, communities are successful. Through this results we present four policy plans for community vitality of the urban regeneration project in South Korea.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.89.1-89.1
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• 2011

According to green growth's policy, green-home dissemination's projects are promoting. Among them, stationary fuel cell systems are receiving attention due to high efficiency and clear energy. But it need absolutely to develop cost down technologies and improve system durability for commercialization of the fuel cell system. To achieve this objectives, in 2009, the Korean Government and "Korea Institute of Energy Technology Evaluation and Planning(KETEP)" launched into the strategic development project of BOP technology for practical applications and commercializations of stationary fuel cell systems, named "Technology Development on Cost Reduction of BOP Components for 1kW Stationary Fuel Cell Systems to Promote Green-Home Dissemination Project". This paper introduces a summary of improved BOP performances that has been achieved through the 2nd year development precesses(2010.06~2011.05) base on 1st year development precesses(2009.06~2010.05). The major elements for fuel cell systems are cathode air blowers, burner air blowers, preferential oxidation air blowers, fuel blowers, cooling water pumps, reformer water pumps, heat recovery pumps, mass flow meters, electrical valves, safety valves and a low-voltage inverter. Key targets of those elements are the reduction of cost, power consumption and noise. Invert's key targets are development the low -voltage technologies in order to reduce the number of unit cell in fuel cell system's stack.

• 한국산학기술학회논문지
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• 제12권6호
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• pp.2851-2858
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• 2011

본 논문에서는 활동중심의 공정관리와 내역중심의 기성관리로 각각 이원화되어 운영되고 있던 건설공사의 진척관리를 통합 연동하여 관리 할 수 있도록 하기 위한 데이터베이스 모델을 제안한다. 이를 위해 본 논문에서는 활동중심 공정관리 DB를 4개의 엔티티로 구성하고 내역중심의 기성관리 DB를 3개의 엔티티로 구성하여 독립적으로 운영될 수 있도록 함과 동시에 활동중심 공정관리 DB내에 연동 엔티티를 이용하여 내역중심 기성관리 DB내 엔티티와의 관계설정을 통해 두 가지 공정관리 시스템내의 데이터들이 연동될 수 있도록 하였다. 또한, 데이터의 공유를 위해 기본적으로 요구되는 데이터의 일관성, 무결성 및 최신성을 유지할 수 있도록 연동 엔티티 속성을 정의하였다. 제안된 개선된 데이터베이스 모델을 실제 구현하고 활용성 검증을 통하여 데이터의 연동 및 효율성을 입증하였다.

• ETRI Journal
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• 제19권3호
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• pp.83-97
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• 1997

The CDMA Mobile System (CMS) has been developed by Electronics and Telecommunications Research Institute (ETRI) and field-tested for commercial service deployment in Korea. The project was started in 1989 and completed in 1995 with the CMS commercial test. During the course of development, there had been active technical cooperation with Qualcomm, Inc. and Korean manufacturers. The CMS adopted the basic CDMA concepts conforming to Korean CDMA system which was derived form IS-95. The CMS functions are allocated to subsystems by considering efficiency and expandability. The CMS consists of mobile stations and the infrastructure which is composed of base stations, mobile exchanges and home location register/authentication center. The commercial field tests performed both in Taejon and Seoul have indicated that the CMS capacity is 10 to 15 times larger than that of AMPS. This paper overviews the development history, system characteristics, architecture and test results.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.433-439
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• 2007

A ubiquitous environment in construction requires integrating hardware and software systems. Currently the Construction System Integration Lab (CSIL) at Pusan National University is currently studying the application of ubiquitous technology for better communication in the construction process. In this paper, a pilot of Ubiquitous Concrete Pour System (u-CPS) has been presented to demonstrate the effectiveness of data exchange in the concrete pour process. The u-CPS environment takes advantage of the RFID technology for collecting construction data. The pilot can automatically generate the data for concrete pour work such as departure time, arrival time, concrete pour time. Construction managers can keep track of the progress of concrete pour work using the information. A case study was done for a building construction using the pilot system, the result of which demonstrated that the RFID-base system can help improve the effectiveness of data communication during the concrete pour process.

• 한국산학기술학회논문지
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• 제20권10호
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• pp.179-186
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• 2019

국내 무기체계 연구개발은 사업의 특성을 고려하여 정부 출연 연구소 또는 국내 업체 중 한 곳이 주관하여 추진한다. 그러나 그동안 연구개발 주관기관 선정을 위한 평가항목 및 절차 등에 대한 연구는 부족하였다. 이에 본 연구에서는 연구개발 주관기관 선정에 필요한 절차, 항목 등이 포함된 방법론을 제시하고자 한다. 먼저 연구개발 주관기관 평가항목을 객관화하기 위해 과거 사례 조사, 전문가 자문을 통해 평가항목 후보군을 작성하였다. 델파이 설문을 통해 최종적으로 '핵심기술 보유/준비 현황' 등 5개의 항목이 선정되었으며, 계층분석법(AHP: Analytic Hierarchy Process, 이하 AHP)을 통하여 평가항목 간 가중치를 설정하였다. 가중치는 대분류에서 '기술적 요소', '사업적 요소'로 분류하였으며, '기술적 요소'의 하위요소는 '핵심기술 보유/준비현황', '유사체계 경험'으로, '사업적 요소'의 하위요소는 '위험요소 관리', '사업수행 기반 여건', '사업참여의지'로 분류하였다. 각 평가항목의 최종가중치는 '핵심기술 보유/준비현황(0.405)'이 가장 높게 나타났으며, 그 다음으로 '유사체계 경험(0.297)', '위험요소 관리(0.127)', '사업수행 기반 여건(0.124)', '사업참여의지(0.047)'의 순으로 나타났다. 도출된 평가항목은 00 체계의 사례에 적용하여 그 결과를 확인하였다.