• 한국지반환경공학회 논문집
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• 제8권3호
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• pp.11-18
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• 2007

본 연구에서는 파급효과가 큰 공동주택에서 지열 냉난방 시스템의 경제성을 아파트 분양평형, 운전시간, 냉난방 및 급탕 설치형태별로 구분하여 초기 공사비 증가, 운전비 절감액, 초기 투자비 회수기간등을 산정하였다. 냉난방 및 급탕 운전시간이 많을수록 초기 공사비 증가액에 비해 운전비용 절감액이 커 초기 투자비 회수기간이 단축되었다. 전용면적이 클수록 투자회수 기간이 길었으며 냉난방 및 급탕 설치형태에서는 냉난방을 지열원, 급탕을 폐열회수한 경우가 초기 투자 회수기간이 가장 짧았다. 기존 시스템(패키지 에어콘, LNG 난방 및 급탕)에 비해 냉난방, 급탕을 모두 지열로 이용하는 경우, 냉난방은 지열, 급탕은 폐열을 이용하는 경우, 냉난방은 지열, 급탕은 LNG인 경우에 공사비가 $m^2$당 각각 약 72,000원, 66,900원, 62,300원 정도 증가하였다.

• 산업경영시스템학회지
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• 제26권4호
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• pp.82-90
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• 2003

The Systems Engineering, as a methodology for engineering and management of today's ever-growing complex system, is a comprehensive and iterative problem-solving process. The process centers on the analysis and management of the stakeholders' needs throughout the entire life-cycle of a system and searches for an optimized system architecture. There are many essential needs and requirements to be met when a system development task is carried out. Systems Engineering Management Plan(SEMP), as a specification for system development process, must be established to satisfy constraints and requirements of stakeholders successfully and to prevent cost overrun and schedule delay. SEMP defines technical management functions and comprehensive plans for managing and controlling the entire system development process, specialty engineering processes, etc. Especially. in the case of a large-scale complex system development program where various disciplinary engineering such as mechanical; electrical; electronics; control; telecommunication; material; civil engineering etc. must be synthesized, it Is essential to develop SEMP to ensure systematic and continuous process improvements for quality and to prevent cost/schedule overruns. This study will enable the process knowledge management on the subject of SEMP as a core systems engineering management effort, that is, definitely defining and continuously managing specification of development process about requirements, functions, and process realization of it using a computer-aided systems engineering software. The paper suggests a systematic SEMP development process and demonstrates a data model and schema for computer-aided systems engineering software, RDD-100, for use in the development and management of SEMP. These are being applied to the systems engineering technology development task for the next-generation high-speed railway systems in progress.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제22권8호
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• pp.363-368
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• 2016

기존의 스토리지 기반 가상 데스크탑 시스템은 디스크에 입출력이 집중될 경우 성능이 저하되는 문제가 발생하였다. 따라서, 부트 스톰과 같이 여러 대의 가상 데스크탑이 동시에 부팅할 경우, 시스템의 성능이 급격히 저하되었다. 본 논문에서는 가상 데스크탑 시스템의 성능을 향상시킬 수 있는 메인 메모리 기반 가상 데스크탑 시스템을 제안한다. 본 시스템에서는 가상 데스크탑 이미지를 메인 메모리에 저장함으로써 전체 시스템의 성능을 향상시키고, 중복 제거 기술을 적용하여 용량이 많은 가상 데스크탑 이미지를 한정된 크기의 메인 메모리에 저장하였다. 본 시스템의 구현 및 실험을 통하여 가상 데스크탑을 동시 부팅할 때, 스토리지 기반 가상 데스크탑 보다 부팅 속도가 4배 빠름을 확인하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.751-752
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• 2008

This paper introduces current technology trend of cell planning system in radio propagation and 3D GIS technologies which are implemented in Cell planning system "CellTREK" for accurate radio propagation analysis. It includes managing of DTM(Digital Terrain Model) data considering building height used by 3D propagation analysis module, and navigation module based on DirectX technology to estimate and eliminate the shadowing area by high rise buildings.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(5)
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• pp.165-168
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• 2002

This paper has been studied about the real time monitoring system development using TCP/IP ethernet and RS-422 serial communication link in general communication methods that rocket fire control agents could be monitoring about real time Rocket fire event procedures and be managing total rocket fire courses. Also, this paper has been studied the HMI(Human Machine Interface) control program and algorithm that guarantee confidential control for the Fire Display System.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 추계학술대회 논문집
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• pp.501-505
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• 1996

In CMM system, a contact probe is not applicable to very small, or flexible elements. There is need to develop non-contact probes of CCD camera. But non-contact probes have some technical problems, including distortion, user interface and time delay. This development gives the foundation of the non-contact probe system and some useful solutions for the problems. The results can be useful for industry application.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2007년도 춘계학술대회
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• pp.190-196
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• 2007

With the rapid development of electronic commerce, online reputation management systems are of increasing importance in building trust and managing risk. Reputation rating mode and aggregating method are the most crucial parts of a reputation management system. In this paper, we analyze the merits and disadvantages associated with the rating mode and aggregating approach of current reputation management systems, and put forward some suggestions. These suggestions are helpful in improving current reputation management systems and developing new reputation management systems.

• 대한안전경영과학회지
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• 제10권1호
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• pp.155-166
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• 2008

During last two decades the transportation system has developed into very intelligent system with GIS, GPS and ITS. The practical transportation management system provides real time response module to manage the customer's order. We have surveyed research papers on the real time vehicle routing problem in last two decades to figure out the dynamic vehicle routing problem. The papers are classified by basic routing algorithms and by managing the dynamic events which are the order management, the routing re-optimization, the routing post-optimization and the waiting strategy.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 1995년도 제4회 멀티미디어 산업기술 학술대회 논문집
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• pp.203-211
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• 1995

영상회의 시스템과 같이 그룹의 멤버들이 서로 다른 지점에 위치하면서 실시간으로 대화하는 시스템을 실시간 분산 그룹웨어 시스템(real-time distributed groupware system)으로 정의한다. 회의 관리는 영상회의를 원하는 사용자가 네트웍 상에서 현재 열리고 있는 회의세션을 검색하거나, 새로운 회의세션을 생성하여 영상회의를 시작시키거나, 앞으로 열릴 회의세션을 예약하거나 등의 서비스를 제공한다. 여기서 회의세션의 의미는 분산된 시스템들과 그 시스템의 사용자들이 하나의 그룹을 형성하고, 그룹내에서 클라이언트와 서버 형식의 상호작용을 하도록 하는 연결 고리로 정의한다. 본 논문에서는 이러한 서비스를 제공하는 회의 관리구조를 설계하였고, 앞으로 구현 및 확장을 할 예정이다.

• Safety and Health at Work
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• 제7권3호
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• pp.201-207
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• 2016

Background: Korean Working Conditions Surveys (KWCS), referencing European Working Conditions Surveys, have been conducted three times in order to survey working condition and develop work-related policies. However, we found three limitations for managing the collected KWCS data: (1) there was no computerized system for managing data; (2) statistical KWCS data were provided by limited one-way communication; and (3) the concept of a one-time provision of information was pursued. We suggest a web-based public service system that enables ordinary people to make greater use of the KWCS data, which can be managed constantly in the future. Methods: After considering data characteristics, we designed a database, which was able to have the result of all pairwise combinations with two extracted data to construct an analysis system. Using the data of the social network for each user, the tailored analysis system was developed. This system was developed with three methods: clustering and classification for building a social network, and an infographic method for improving readability through a friendly user interface. Results: We developed a database including one input entity consisting of the sociodemographic characteristics and one output entity consisting of working condition characteristics, such as working pattern and work satisfaction. A web-based public service system to provide tailored contents was completed. Conclusion: This study aimed to present a customized analysis system to use the KWCS data efficiently, provide a large amount of data in a form that can give users a better understanding, and lay the ground for helping researchers and policy makers understand the characteristics.