• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.192-199
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• 2004

In this paper the arthurs introduce the performance verification for Korea high-speed rail system developed at G7 project, how to draw basic provision requirements in the process of construction of national safety criteria certification system, and definition of basic requirements to make safety criteria at each subsystem and technology field in the future.

• Nuclear Engineering and Technology
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• 제33권1호
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• pp.1-11
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• 2001

In contrast with conventional fieldbus researches which are focused merely on real-time performance, this study aims to evaluate the real-time performance of the communication system including fault-tolerant mechanisms Maintaining performance in presence of recoverable faults is very important in case that the communication network is applied to a highly reliable system such as next generation Nuclear. Power. Plant (NPP). If the tie characteristics meet the requirements of the system, the faults will be recovered by fieldbus recovery mechanisms and the system will be safe. If the time characteristics can not meet the requirements, the faults in the fieldbus can propagate to the system failure. In this study, for the purpose of investigating the time characteristics of fieldbus, the recoverable faults are classified and then the formulas that represent delays including recovery mechanisms are developed. In order to validate the proposed approach, we have developed a simulation model that represents the Korea Next Generation Reactor (KNGR) NSSS Process Control System (NPCS). The results of the simulation show us the reasonable delay characteristics of the fault cases with recovery mechanisms. Using the simulation results and the system requirements, we also can calculate the failure propagation probability from fieldbus to outer system.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2005년도 lubricants SYMPOSIUM
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• pp.53-66
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• 2005

[ $\cdot$ ] Performance can be evaluated beyond specification and requirements using existing pump tests $\cdot$ Bench testing of stressed fluids can deonstrate Retention of Performance

• Journal of Astronomy and Space Sciences
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• 제26권4호
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• pp.643-650
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• 2009

Korea Astronomy and Space Science Institute (KASI) has been developing one mobile and one stationary SLR system since 2008 named as ARGO-M and ARGO-F, respectively. KASI finished the step of deriving the system requirements of ARGO. The requirements include definitions and scopes of various software and hardware components which are necessary for developing the ARGO-M operation system. And the requirements define function, performance, and interface requirements. The operation system consisting of ARGO-M site, ARGO-F site, and Remote Operation Center (ROC) inside KASI is designed for remote access and the automatic tracking and control system which are the main operation concept of ARGO system. To accomplish remote operation, we are considering remote access to ARGO-F and ARGO-M from ROC. The mobile-phone service allows us to access the ARGO-F remotely and to control the system in an emergency. To implement fully automatic tracking and control function in ARGO-F, we have investigated and described the requirements about the automatic aircraft detection system and the various meteorological sensors. This paper addresses the requirements of ARGO Operation System.

• 한국추진공학회지
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• 제22권3호
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• pp.128-133
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• 2018

국내 민간 소형 비행기 동력장치의 감항기준은 KAS Part 23 "감항분류가 보통(N), 실용(U), 곡기(A), 커뮤터(C)류인 비행기에 대한 기술기준"과 Part 33 엔진에서 규정하고 있다. 이 기준은 미연방항공청(FAA)의 FAR Part 23 및 Part 33과 유럽항공안전청(EASA)의 CS-23 및 CS-E와 동등한 체계를 갖고 있다. FAA(2016.12.12.)와 EASA(2017.3.29.)는 소형 비행기의 감항기준을 개정하였다. 설계 방식과 적합성 입증방법을 지정한 '규범적 규정'에서 안전한 성능을 달성하도록 목표를 지정하는 '성능기반 규정'으로 전환한 것이다. 이러한 개념 전환에 따라 동력장치 감항기준 또한 대폭 변경되었다. 이에 따른 FAA의 동력장치 인증요건 개정 사항을 살펴보고 국내 감항기준 개정 방향을 고찰하였다.

• ETRI Journal
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• 제28권3호
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• pp.371-374
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• 2006

We propose and analyze a priority queuing scheme that gives priority in the same class of calls according to their total resource requirements (TRRs). The proposed scheme gives a higher priority to the calls that have a lower TRR over the calls that have a higher TRR. The numerical results show that the proposed priority queuing scheme provides better performance than the traditional queuing schemes in call blocking probability.

• 한국군사과학기술학회지
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• 제2권2호
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• pp.52-60
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• 1999

By implementing the Systems Engineering process for the aircraft preliminary design, functional analysis study is performed, hence Functional Interface Data Flow(FIDF) and Functional Flow Block Diagram(FFBD) are generated. Based on FIDF and FFBD, allocable and non-allocable design/performance/RM＆S requirements are allocated to the appropriate levels. Weight and cost tracking and design margin management methodologies are studied and implemented for the balanced aircraft design.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.3019-3026
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• 2011

The pantograph on HEMU400 perform the simulation of following characteristics for pantograph's performance prediction and confirming the EN50119's requirement. To meet the performance requirements for the input data are proposed. Simulation result of the performance requirements are satisfied from proposed input data. The new model was developed by proposed data base on the simulation result. A new developed model data used in following characteristics meet to be sure about what the test was done to count the equivalence of mass. Depending on the results of test to performance prediction, and propose research directions.

• 한국유체기계학회 논문집
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• 제14권1호
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• pp.24-33
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• 2011

A circulating pump with installation space constraints was developed satisfying performance requirements such as flowrate, head and NPSHAv. The development procedures are composed of conceptual design, configuration design, performance analysis by CFD and performance test which were established in KIMM. The developed pump is OH4 type centrifugal pump which has a mixed-flow type impeller, a double volute and a rigid coupling. As a result of tests, the pump proved to meet all the requirements including space constraints and performance.

• 한국컴퓨터정보학회논문지
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• 제23권11호
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• pp.9-15
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• 2018

The Ministry of National Defense announced 'Defense Reform 2.0' that aims to strengthen the country's security for decrease of regional uncertainties, growing requirements for advanced technologies, and a need for more efficiency in the Republic of Korea(RoK) Armed Forces this year. It said RoK Armed Forces have to change efficiently in preparation for rapid decline in military service resources as demographic cliff turning into reality, and the rapid evolution of the "battlefield environment" caused by developments in military science and technologies. RoK Navy combat Management System(CMS) made by domestic proprietary technology since 2000s and development centered on Agency for Defense Development require design changes for added requirements. So in this paper, I propose method of design a low cost and high efficiency navy CMS architecture based on high performance server and virtualization technology. And I create a test environment for analysis performance and compare the performance of proposed navy CMS and existing navy CMS.