• 품질경영학회지
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• 제46권4호
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• pp.821-842
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• 2018

Purpose: To derive key requirements and key technologies for weapon system acquisition business by using Qualify Function Deployment (QFD), and to reduce business cost by setting the target performance and key expense of weapon system. Methods: We propose a QFD methodology that can induce rational decision-making by translating analyst's subjective opinions into quantitative values when analyzing requirements at the initial stage of weapon system development project. Based on QFD methodology, QFD application model combining house of quality, value engineering, and analogy cost estimating technique is presented. Results: It was possible to analyze the specific requirements necessary for the development of the weapon system, to solve the communication problem of the participants, to set clear development direction and target. Conclusion: By applying the QFD application model at the early stage of the weapon system acquisition project, it is possible to reduce the business cost by establishing clear development direction and goal through the procedural analysis process.

• 동의신경정신과학회지
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• 제18권1호
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• pp.123-132
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• 2007

Objective : The purpose of this research is to investigate the effects of Autogenic Training on autonomic nervous system for normal subjects with Heart Rate Variability(HRV). Then HRV of total subjects were analyzed by Sasang constitution, MBTI type and relaxation therapy experience. Method : Autogenic Training was applied on 39 subjects individually. Then HRV was examined each 5 minutes before and after Autogenic Training application. Results : 1. Mean HRV, SDNN, SDSD were significant different in HRV between before and after Autogenic Training application in total subjects. 2. SDNN, SDSD were significant different in HRV between before and after Autogenic Training application in Soeumin. Mean HRV, SDNN, SDSD were significant different in HRV between before and after Autogenic Training application in Taeeumin. Conclusion : The results suggest that Autogenic Training application have shown anti-stress effects. Autogenic Training application to Soeumin and Taeeumin have shown more anti -stress effects than application to Soyangin.

• 대한전기학회논문지:전력기술부문A
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• 제48권7호
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• pp.863-871
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• 1999

While Logic Based Expert System (LBES) has a merit of rapid and complete inference, it also has a defect of huge knowledge base. Hierarchical LBES (HLBES) replaces the assertion time inference of LBES with the multi-level logic minimization procedure, and it guarantees smaller knowledge base comparing with LBES. This paper has two contributions. The one is proposing so-called fact-minimization procedure which reduces not only the number of facts or measured events but also the size of knowledge base dramatically. The other contribution is application of HLBES and the proposed fact-minimization to the fault diagnosis of power system. The application is successfully performed in the example with the transmission system which takes 72 goals and 352 facts.

• Journal of Electrical Engineering and Technology
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• 제5권3호
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• pp.389-399
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• 2010

Available transfer capability (ATC) is a measure of the transfer capability remaining in a transmission system. Application of unified power flow controllers (UPFCs) could have positive impacts on the ATC of some paths while it might have a negative impact on the ATC of other paths. This paper presents an approach to evaluate the impacts of UPFCs on the ATC from a cost/worth point of view. The UPFC application worth is considered as the maximum cost saving in enhancing the ATC of the paths due to the UPFC implementation. The cost saving is considered as the cost of optimal application of other system reinforcement alternatives (except for UPFC) to reach the same ATC level obtained by UPFC application. UPFC application costs include the maximum cost of alleviating the probable negative impact on the ATC of some paths caused by implementing UPFCs. Optimal system reinforcement is used for systems with UPFCs to determine the aforementioned cost. The proposed method is applied to the IEEERTS and the results are evaluated through a sensitivity analysis. The cost/worth of UPFC application is also used to develop an index for optimal UPFC location and the results are compared with those of other indices. A comparison is finally made with the results obtained using an existing ATC allocation profit-based approach to determine UPFC application worth.

• 한국멀티미디어학회논문지
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• 제7권10호
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• pp.1400-1411
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• 2004

오늘날 인터넷의 대중화로 부하가 많은 웹서비스를 제공하는 시스템들은 클러스터기반으로 이동하는 추세이다. 그러나, 기존의 서버 시스템들은 특정 목적을 위한 전용 클러스터 구조로 각 서비스를 위한 클러스터 자원을 각각 보유하고 있으므로 자원의 이용이 효율적이지 못한 문제를 가진다. 본 연구에서는 클러스터상의 자원을 공유하여 부하에 따라 처리 자원을 동적으로 재구성하는 응용서비스 플랫폼을 제안하였다. 제안된 응용서비스 플랫폼은 특정 응용서비스를 제공하는 전위응용서버와 전위응용서버 고부하시 작업을 분담, 처리하는 후위서버군을 기반으로 전위응용서버에서 응용서비스 요청을 처리 또는 분배하는 서비스관리자와 후위서버에서 응용서비스에 대한 요청을 처리하는 작업처리자, 그리고 부하에 따라 후위서버에 작업처리자를 생성 및 제거하는 부하관리자로 구성된다. 클러스터된 후위서버군의 효율적인 관리를 위해 PVM을 이용하였다. 구현된 시스템은 기존의 단일서버 시스템에 비해 안정적인 동작을 보이며, 필요한 자원을 동적으로 할당, 시스템을 재구성함으로써 부하의 변화에 보다 능동적으로 대처할 수 있음을 확인하였다.

• Journal of Astronomy and Space Sciences
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• 제31권3호
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• pp.265-276
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• 2014

The application of software engineering is not common in the development of astronomical observation system. While there were component-wise developments in the past, large-scale comprehensive system developments are more common in these days. In this study, current methodologies of development are reviewed to select a proper one for the development of astronomical observation system and the result of the application is presented. As the subject of this study, a project of operation software development for an astronomical observation system which runs on the ground is selected. And the output management technique based on Component Based Development which is one of the relatively recent methodologies has been applied. Since the nature of the system requires lots of arithmetic algorithms and it has great impact on the overall performance of the entire system, a prototype model is developed to verify major functions and performance. Consequently, it was possible to verify the compliance with the product requirements through the requirement tracing table and also it was possible to keep to the schedule. Besides, it was suggested that a few improvements could be possible based on the experience of the application of conventional output management technique. This study is the first application of the software development methodology in the domestic astronomical observation system area. The process and results of this study would contribute to the investigation for a more appropriate methodology in the area of similar system development.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.63-67
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• 2009

전자인식 시스템에서 택의 고유정보는 호스트 컴퓨터 내의 응용 프로그램에 의해 처리된다. 응용 프로그램의 예는 주차관리 프로그램, 도서관리 프로그램 등이 있다. 리더에서 인식된 Tag의 ID는 호스트 컴퓨터로 입력된다. 컴퓨터의 응용 프로그램은 컴퓨터의 DB 내에 Tag ID 같은 데이터를 찾는다. 같은 ID를 찾은 후, 응용 프로그램의 운영 목적에 따라 호스트 컴퓨터는 제어 명령을 해당 H/W에 전달한다. 이러한 과정은 호스트 컴퓨터에 있는 프로그램의 진행이 된다. 그러나 수행과정이 정상적으로 동작이 되는지를 원거리에서 확인할 필요가 있다. 원거리에서 진행과정을 감시할 때에는 2가지의 매체를 사용한다. 일반적으로 유선감시 시스템과 무선 감시 스템이다. 유선방법 중에 유용한 것은 인터넷 통신망이다. 무선을 이용하는 것은 블루투스 통신망이다. 이 두 매개체는 간단히 그리고 에러없이 수행과정을 모니터를 할 수 있다. 본 논문에서는 우선 RFID 시스템을 제작한다. 125KHz를 반송파로 하고 있는 EM4095 칩을 사용하여 RFID 시스템을 구현한다. Tag의 고유 ID는 W3100A 칩을 사용한 모듈을 통하여 원격지에 보내어 진다. 이러한 시스템을 제작하고, 데이터 송수신을 간단한 응용 프로그램을 이용하여 확인하였다. 결과로는 수신율 확인하고, 전체 시스템 및 각 부분을 사진으로 보여 준다. 그리고 각 부분의 제어 프로그램을 설명하였다.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2002년도 한국우주과학회보 제11권2호
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• pp.48.2-48
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• 2002

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2007년도 춘계학술대회
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• pp.209-212
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• 2007

A very detail instruction of a m-Business application case for small scale company is given. Two results are proved. The one is that m-business application can reduce system building and maintaining fee. The other is that m-business application should running on the mobile machine with caching some application data on it.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.603-607
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• 1988

On this paper, the application of Eiganstructure assignment to flight control system design is presents. Both output feedback and constrained output feedback are considered. The computer implimentation of the algorithm is discussed including the utilization of real arithmetic for complex conjugate eigenvalue. And the example include a stability augementation system, an autopilot decoupled mode control.