• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2010년 춘계학술대회논문집
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• pp.60-66
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• 2010

In the view of robust design optimization, RAE2822 airfoil was designed to achieve not only the maximum lift-to-drag ratio but also insensitivity of that. While the RAE2822 is flying at the cruise speed, Mach variation is considered as the operational uncertainty. In order to explore the design space, metamodels were introduced instead of consecutively computing the gradient. Also a metamodel was used to represent the sigma space. Using the metamodel, an optimum value was searched in the view of global optimization.

• 국제학술발표논문집
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• The 7th International Conference on Construction Engineering and Project Management Summit Forum on Sustainable Construction and Management
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• pp.124-132
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• 2017

This paper describes the Around View Monitoring (AVM) system for hydraulic excavators that prevents the safety accidents caused by blind spots and increases the operational efficiency. To verify the developed system, experiments were conducted with its prototype. The experimental results demonstrate its applicability in the field with the following values: 7m of a visual range, 15fps of image refresh rate, 300ms of working information data reception rate, and 300ms of surface condition data reception rate.

• 한국환경복원기술학회지
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• 제8권1호
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• pp.52-62
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• 2005

The objectives of this research is searching for the improvement scheme of spacial use of the Nature Environmental Conservation and its Utilization Facility through the analysis of those existing facilities from the structural and operational view points. In this study, firstly, analysis is commencing with the distinction of lawful and operational concepts of Nature Environmental Conservation and its Utilization Facility. In law, the concept is defined as an individual facility, while practical use of the concept has been understood as a collective space itself. Secondly, frequency tables in regard to the duration of the construction, types of location and objectives, and facility numbers are prepared on the basis of 53 cases of completed and under construction facilities. Conclusively, through the comparisons of facilities of Korea, United Kingdom and Germany, the future considerations on the improvement of the facilities in light of structural and operational aspects has been recommended. In structural view, ecological conservation aspect should be considered from the planning stage of the facility. And at the operational stage, various considerations should be given to the employment of facility experts and development of educational programs respectively.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.143-146
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• 2005

The software reliability growth depends on the testing time because the failure rate varies whether it is long or not. On the other hand, it might be difficult to reduce failure rate for most of the cases are not available for debugging during operational phase, hence, there are some literatures to study that the failure rate is uniform throughout the operational time. The failure rate reduces and the reliability grows with time regardless of debugging. As a result, the products reliability varies with the time duration of these products in point of customer view. The reason of this is that it accumulates the products experience, studies the exact operational method, and then finds and takes action against the fault circumstances. I propose the simple model to represent this status in this paper.

• 산업노동연구
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• 제19권1호
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• pp.65-104
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• 2013

본 연구는 자원기반관점을 기초로 고성과작업시스템-종업원성과-운영성과 간 관계를 실증적으로 검증하고자 하였다. 조직수준의 고성과작업시스템과 개인수준의 종업원 태도 간 실증분석을 위해 위계적 선형모형(hierarchical linear modeling)을 활용한 다수준분석을 실시하여 인과관계의 정확성을 높였다. 이를 위해, 제3차 인적자원기업패널(HCCP: Human Capital Corporate Panel) 데이터 가운데 316개 기업과 7,872명(팀장 923명 포함)의 응답자를 대상으로, 고성과작업시스템이 개인수준인 종업원성과에 미치는 영향을 확인하였다. 이후, 분석수준을 일치시키기 위해 개인수준(종업원성과)과 팀수준(운영성과)의 패널자료를 조직수준으로 집산(aggregation)하여 타당화 검증을 실시하고, 조직수준에서 매개효과를 검증하였다. 그 결과, 고성과작업시스템은 종업원성과(직무만족, 조직몰입, 신뢰)와 운영성과에 각각 유의한 영향을 미치는 것으로 나타났다. 종업원성과 개별변수의 매개효과 검증에서는 직무만족과 신뢰가 고성과작업시스템과 운영성과 간 관계를 매개하는 것으로 나타났다. 결론에는 연구의 결과, 이론적 시사점 및 한계점을 제시하고 있다.

• 시스템엔지니어링학술지
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• 제17권2호
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• pp.23-36
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• 2021

Recently, the rapid development of drones is increasing as a variety of threats to important facilities of the country. In order to build an anti-drone system that responds to drones with high technical characteristics, standardization is required in terms of operation, system, and technology. By applying the defense architecture framework, it contributes to the establishment of the optimal system by proposing a standardization plan for the operational and system perspectives of the anti-drone system by creating outputs equivalent to the stage of prior research on weapons systems. It is a prerequisite for building a drone system the operational concept of the anti-drone system, the definition of the drone threat, the function of each component, the interface, the definition of data flow, the system performance and effect scale, etc. Management, security officers, and equipment manufacturers of important national and public facilities on site expect that it will be used as an objective standard at the government level for the component technology of the equipment to respond to the drone threat and the performance required in the environment.

• Journal of Information Technology Applications and Management
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• 제13권2호
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• pp.17-28
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• 2006

The SRGM has been studied under the assumption that S/W reliability can grow as the fault causing failure is removed even during operational phase because the debugging is available. On the other hand, some papers insist on the uniform failure rate during operational phase because the debugging may not be available in case of universal software. The phenomenon, however, has been observed informally many times that the products S/W reliability grows as the time goes by even without any debugging in point of customer view. I propose the simple approaching method to model the S/W reliability phenomenon that the failure rate reduces as time goes on without modifying the existing reliability model in this paper.

• International Journal of Control, Automation, and Systems
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• 제3권1호
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• pp.122-129
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• 2005

We describe the MiniWeb[7] TCP/IP stack (mIP), which is an extremely small implementation of the TCP/IP protocol suite running 8 or 32-bit micro controllers intended for embedded control systems, and satisfying the subset of RFC1122 requirements needed for host­to-host interoperability over different platforms. Our TCP/IP implementation does sacrifice some of TCP's mechanisms such as fragmentation, urgent data, retransmission, or congestion control. Our implementation is applicable to web based controllers. The network protocols are tested in operational networks using CommView and Dummynet where the various operational parameters such as bandwidth, delay, and queue sizes can be set and controlled.

• 한국국방경영분석학회지
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• 제3권2호
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• pp.91-101
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• 1977

The recent issue on the withdrawal of U.S. Forces from Korea Suggests an Urgency of Self Defense of Korea. The expected huge defense budget and her armed forces create a need for an operational analysis. It is shown through a statistical analysis what some of the opportunity costs of defense spending have been. Some evidences about what some of the economy sacrifice if defense spending rises have been analyzed to provide executive departments with a quantitative basis for decisions. The Korea-U.S. alliance is discussed in view of the developmental effects of U.S. aids and deterrent effects of U.S.F.K.

• 한국시뮬레이션학회논문지
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• 제26권1호
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• pp.1-11
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• 2017

지난 수년 동안 한국군은 실제전장과 같은 엘브이시(LVC) 합성전장환경 구축을 위해 노력해 왔다. 그러한 노력에도 불구하고 성과가 극히 미미한 상태이다. 이는 주로 작전요구 및 운용개념의 결여와 아키텍처와 기반기술에 대한 정책과 체계적 접근이 미흡한데 기인한다. 더욱이 엘브이시(LVC) 기본개념과 원칙에 대한 충분한 이해 부족과 더불어 기관 간에 이해가 상충함에 기인한다. 본 연구에서 저자는 작전운용 관점보다 시스템 관점과 기술표준 관점에서 에치엘에이(HLA) 아키텍처에 기반하여 엘브이시(LVC)를 구축할 것을 제안하고 있다. 한국군이 엘브이시(LVC) 구축을 위한 접근방법으로 우선 정보중심의 통합방법을 적용하고, 아키텍처 수렴노력의 일환으로 에치엘에이/알티아이(HLA/RTI)를 기반으로 구축하며, 에치엘에이(HLA) 인증시험과 페더레이션 연동시험을 강화하고, 국제표준인 디십(DSEEP), 디마오(DMAO) 및 피트(FEAT)를 도입 적용하며, 마지막으로 에브이시(LVC) 적합성 인증시험체계를 구축하여 적용할 것을 제안하였다.