• 제어로봇시스템학회논문지
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• 제9권10호
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• pp.836-843
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• 2003

The automatic train control (ATC) system development project for the Automated Guideway Transit (AGT) system has high technical risk because the system is unmanned train control system using wireless technology which was unprecedented in train control industry of Korea. To overcome the technical risk during concept design phase of the ATC system development project, the integrated product team(IPT) carried out a reverse and reengineering process using a systems engineering design model. The generic systems engineering process is incorporated in the both reverse and reengineering process. As a result of the systems engineering effort, the IPT has built top layer systems engineering design model of the ATC subsystem. The purpose of this paper is to deliver the reverse and reengineering process which was used to develop the systems engineering design model of ATC system using a computer aided systems engineering tool. This study also shows that the model based reverse and reengineering process can reduce the technical risk by identifying the differences of requirement, functional and physical architecture between a reference system and a target system.

• Computers and Concrete
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• 제21권4호
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• pp.385-397
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• 2018

This study is focused on the investigation for similitude the requirements between prototype and scaled models to determine the structural behavior of concrete load bearing systems. The scaling concept has been utilized in many engineering branches, has been assisted to engineers and scientists for obtain the behavior of the prototype by using scaled model. The scaling can be done for two purposes, either scaling up or scaling down depending upon the application. Because, scaled down models are the experimentation on scaled models is cheaper than huge structures. These models also provide facilities for experimental work. Similarity relationships between systems are created either by field equations of the system or by dimensional analysis. Within this study, similarity relationships were obtained by both methods. The similarity relations obtained are applied to different load bearing systems and it is determined that the similarity relation is a general expression. In this study, as an example, column, frame, cantilever beam and simple beam are chosen and 1/2, 1/5 and 1/10 scales are applied. The results are compared with the analytical results which are obtained by creating of the finite element models with SAP2000 software of different scaled load bearing systems. The analysis results of all systems are examined and it is determined that the scale factors are constant depending on the scale types for different load bearing systems.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 1999년도 추계종합학술대회
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• pp.66-70
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• 1999

영국의 정보통신기술기준체제는 다양한 형태의 운영양상을 띠고 있다. 이는 크게 유럽지침에 의거 직접적으로 입법화를 하는 경우 (Direct Legislation by EU Directive) 유럽공통기술기준(CTR:Common Technology Regulations)을 사용하는 경우, 영국 국가기술기준 (NTR: National Technology Requirement)를 사용하는 경우, 기본통신법의 후속조치인 시행령(order) 및 시행규칙(Regulation)을 사용하는 경우로 나누어볼 수 있다. 이러한 영국의 정보통신 기술기준 운영체제의 특징을 정리해보면 다음과 같다. 첫째 영국은 기본적으로는 유럽연합의 공통기술기준(CTR) 운영체제를 수용하면서도 별도의 국가기술기준(NTR)을 제정 단말장치분야와 같은 망 간 접속에서 규격의 통일화 및 호환성 확보에 보다 중점을 두고 있다는 점이다 둘째, 영국에서의 기술기준의 적용유형은 상당히 복잡하면서도 고도로 체계화되어 있다는 점이다. 셋째, 영국은 BSI 표준 및 BABT의 SITS 등을 통합하여 국가적 차원의 강제규범화 사업자 표준을 국가적 규범의 틀로 흡수하고 있다는 점이다.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.245-254
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• 2020

This study investigates the impact of the country's governance on the revenue efficiency in the banking sectors of 42 Islamic banks in 15 countries offering Islamic banking and financial services. Technical efficiencies of individual Islamic banks were analyzed using the Data Envelopment Analysis method. The Ordinary Least Square estimation method is employed to examine the impact of country supervision and regulation on the technical efficiency of Islamic banks. With robustness check, the study assesses the impact of bank regulations and supervision on the efficiency of Islamic banks operating in different regions. The empirical findings suggest that supervisory power, activity restrictions, and private monitoring positively influence the efficiency of Islamic banks. On the other hand, we observe a negative impact of capital requirement on Middle East and North Africa (MENA) countries. The findings indicate that supervisory power, activity restrictions, and private monitoring positively influence the efficiency of Islamic banks in Asia, but vice versa on capital requirement in MENA countries. This study will contribute to the body of knowledge by assessing the types of reforms in bank regulations and supervision that work best for Islamic banks in order to increase the level of efficiency and the level of regulations and supervision of Islamic banks.

• 대한방사선기술학회지:방사선기술과학
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• 제22권1호
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• pp.5-11
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• 1999

This paper reviews recent major activities on instrumentation and methodology of PET. The performance of the PET instrumentation can be expressed by four physical characteristics, 1) spatial resolution, 2) coincidence resolving time, 3) energy resolution, and 4) detection efficiency. The physical and technical aspects of PET systems are briefly discussed along with these characteristics. Toward high resolution PET the recent trend has been to design multiple rings of densely packed detector arrays with scintillators. In order to satisfy the sampling requirement in reconstruction, continuous detector units has been developed. Iterative image reconstruction algorithms have received considerable attention for improvement of both the sampling requirement and image quality toward the stationary PET. Better resolving time improves the maximum true coincidence rate, which is also increased with more detectors placed in coincidence with each other. It suggests that volume PET is promising for enhancement of detection efficiency. The scattered coincidence event rate may be reduced by using detectors with better energy resolution. The use of interplane septa, however, takes over improvement of energy resolution in 2D PET. Energy resolution becomes an important factor for image quality under the condition of septa removal such as volume PET. Toward full utilization of emitting photons, 3D reconstruction incorporating oblique rays has been studied, and volume reconstruction algorithms have been developed. Practical volume PET systems impose heavy burden not only to detector sets and coincidence circuits, but also to computers in the memory requirements and the data processing. In conclusion, there have been many ingenious methods in development of PET instrumentation, which are based on unique capability of PET. They will be expected to overcome technical limitations, and to approach the fundamental limits.

• 한국산학기술학회논문지
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• 제19권5호
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• pp.153-159
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• 2018

최근 들어 국방 분야 무기 시스템의 연구개발은 점차 대형화, 복잡화 그리고 장기화하고 있으며, 그에 따라 예산 및 개발 기간도 증가추세이다. 이러한 문제를 개선하기 위해 국방 분야에서는 민간분야의 예비 타당성 제도를 벤치마킹하여 전력소요검증위원회를 설치 운영하여 소요의 적절성, 사업의 추진 필요성 및 우선순위 등을 검증하는 업무를 수행하고 있다. 이에 본 연구는 무기체계 개발의 효과적인 개발 우선순위를 결정하기 위한 방법론을 제안하고자 있다. 첫 번째로 국방 분야의 연구개발을 평가하기 위한 평가 요소들을 기존 연구결과 및 국내 실정을 고려하여 선정하였으며, AHP 기법을 사용하여 기술적인 위험 및 수익성 차원에서 평가 요소들의 가중치 값을 구하였다. 또한, 연구개발 사업인 32개 무기체계에 방법론을 적용하고 결과를 위험성과 수익성 차원의 4가지 분류로 분석해 보았다. 결론적으로 기존 방법론에서는 간과할 수 있었던 수익성 차원의 분석이 가능해 짐에 따라 위험성이 높더라도 수익성이 높은 사업에 대한 재검토가 가능해졌으며 전략적인 국방연구개발 예산의 배분이 가능해졌다.

• 한국건축시공학회지
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• 제11권2호
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• pp.108-115
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• 2011

본 연구는 건설사업관리 시장의 공정한 경쟁을 위하여 국내 CM 시장현황, 2010년 CM 공시업체현황 및 평가기준 분석을 통하여 CM 선정방식을 고찰하였다. 또한 건설사업관리의 평가기준의 적정성을 고찰하기 위하여 2009년도 CM 상위업체 현황과 2002년부터 2010년까지 120개 CM 용역의 참가자수와 평균 투찰율을 분석하고, 2010년 평가 결과를 공개한 6개 CM용역을 분석하였다. 이러한 고찰결과 현행 CM용역의 평가기준이 용역금액으로 결정되고 기술제안서 평가에 따른 기술력과 가격이 연계되지 못하는 등 CM 산업의 발전과 CM회사의 기술발전을 저해하는 결과들이 도출되었으므로 사업특성과 기술력 요구조건에 따른 CM자 선정방식의 개선을 제시하였다. 따라서 향후에는 사업특성별로 기술력 요구조건을 구분하는 방식과 CM 사후평가를 위한 추가의 연구 노력이 필요할 것으로 판단한다.

• 시스템엔지니어링학술지
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• 제9권1호
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• pp.47-53
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• 2013

The object of this study is to define systematically for outputs of Verification Process among the system life cycle process based on ISO/IEC 15288 for power supply system, which is one of the importance sub-systems to configure the LRT system. Furthermore, to prevent various problem in advance that can occur in the Transition LRT's power supply to be completed Integration. For this purpose, traceability of verification requirement and outputs. should be managed to use verification for system requirement and data processing tool. by system engineering techniques of system life cycle process based on ISO/IEC 15288 to LRT system.

• 대한임베디드공학회논문지
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• 제14권6호
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• pp.329-338
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• 2019

Today's embedded software (SW) developments are mostly preceded by composing Software Requirement Specification (SRS). In particular, in the domain of weapon systems, it is essential to have a systematic method for the verification of the SW functionality. To be more specific, it is crucial to check if the SW functionality is implemented as described in SRS, so-called SW suitability verification. Unfortunately, existing static or dynamic SW testing methods are not sufficient to evaluate suitability with SRS since those testings only verify the robustness of the SW codes. In this paper, we propose an automatic embedded SW suitability verification framework which is based on a structured SRS. The major challenge in the automation of this verification framework is how to get rid of ambiguities in SRS. In order to overcome this challenge, we propose a structured SRS description framework and the supporting toolchain for that. We show how the proposed framework is applied to an actual SRS of a weapon system.

• 시스템엔지니어링학술지
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• 제2권2호
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• pp.11-20
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• 2006

For systematic and effective achievement of Military R&D(Research and Development) processes and activities, information system which supports the concept of Systems Engineering is necessary. WISEMAN(Weapon System Information Integration for System Engineering and Management) is an information integration system, which can provide various kinds of interrelated application functions and assist the collaboration and concurrent engineering activities for weapon system R&D processes and activities. WISEMAN can manage the design information and configuration data of the target development products. It takes charge of the processes and histories about the product data, makes to share all the design information, and provides important application functions for R&D processes such as requirement management, product structure management, parts Management, documents and CAD drawing management, design change management, TDP(Technical Data Package) management etc., and in conjunction with these functions WISEMAN controls various effectivities of system configurations based on baselines and model information. WISEMAN has been used by ADD and Rotem Co. since developed.