• Journal of the Korea Society for Simulation
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• v.28 no.3
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• pp.11-23
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• 2019

An AddSIM(Adaptive distributed and parallel Simulation environment for Interoperable and reusable Models) is developed to construct a composite environment that can be used in the overall stage from military demand analysis to test and evaluation. In addition, a base system model(BSM), which is a component model of the weapon system with standardized hierarchies, has been developed. This paper describes the critical design of BSM for the guided weapon system that can be operated in AddSIM. The guided weapon system BSM is designed for reusability and interoperability, and to have the same interface for assembly, even if the subcomponents have different resolution. Then, each subcomponent is defined and implemented according to the component resolution classification scheme. Finally, Combinations of subcomponents have been used to construct the guided weapon system of various resolution and the performance is compared and analyzed through simulation.

• Journal of Korean Tunnelling and Underground Space Association
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• v.22 no.1
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• pp.107-120
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• 2020

In a performance-based evaluation of structures in use, the current performance is assessed by summing up the weighting of the evaluation indices for each performance. In this study, to suggest a performance-based evaluation technique for NATM tunnels in use, the performance evaluation indices were derived by examining the characteristics and similarities of each index developed from previous study. The weighting of the evaluation indices was derived by calculating the relative importance of each evaluation indices from the AHP analysis. In order to develop a quantitative evaluation model, grading criteria for each performance index was derived through literature review, and performance evaluation tables for road and railway tunnels were presented. In order to verify the significance of the proposed performance evaluation model, the correlation analysis was performed between each evaluation index and the final evaluation result. In the correlation analysis, the survey data measured through precision safety diagnosis in the tunnel in use was applied. It may be said that the proposed evaluation indices, weighting, criteria and evaluation models for tunnels in use can be applied to the performance-based maintenance system of tunnels.

• Proceedings of the KIPE Conference
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• 2004.07b
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• pp.895-897
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• 2004

BT(Bio Technology)산업은 IT, NT와 더불어 미래 핵심산업으로서 그 중요성이 근래에 더욱 부각되고 있다. BT의 중요성이 대두됨에 따라 체계적인 종자, 백신등의 식물 배양기술의 필요성 또한 부각되고 있다. 기존의 배양 기술은 분석기술에 비해 낙후되고 비과학적인 방식으로 배양 되어왔다. 체계적인 제어계측이 이루어지지 않은 상황에서 고품질의 종자, 백신의 배양은 힘들다 할 수 있다. 본 논문에서는 체계적이고 정확한 종자 및 백신의 배양이 가능한 제어계측 시스템 구축을 위하여 공정제어 및 계측 분야에 널리 쓰이고 있는 LABView를 이용한 제어계측 시스템을 구축하고자 하였다. 전체적인 시스템 구축에 앞서 본 논문에서는 제어계측 시스템에서 주된 요소로서 온습도 계측 시스템을 설계 및 구축하여 성능을 분석하였다.

• Proceedings of the Korea Society for Simulation Conference
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• 1999.04a
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• pp.116-120
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• 1999

현재 S회사의 생산공정은 전 과정에 걸쳐 통합된 정보처리 체계가 없고, 생산계획 및 통제 과정에서의 복잡한 계산 및 중요한 의사결정이 담당자의 경험적 지식에 의존하고 있다. 이러한 상황의 한계로, 현재의 생산공정계획 및 생산실행계획은 시간적 제약이 크고, 유연적인 수정이 어려울 뿐 아니라, 통계적 분석의 자료체계가 부실하다. 그러나, S회사는 보다 개선된 공정관리를 위해 새로운 생산계획전략의 필요성을 느끼고 있다. 본 논문에서는 이러한 문제를 해결하기 위한 하나의 접근방법으로써 DEVS 형식론을 바탕으로 공정을 효과적으로 모델링 및 시뮬레이션화 하였다. 생산계획의 핵심부분인 전문담당자의 경험적 지식을 체계적 규칙으로 정리하여 모델에 반영하였고 이를 통해 습득된 시뮬레이션 결과를 분석하여 생산계획 전략의 신뢰할만한 평가기준을 마련하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10d
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• pp.571-573
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• 2002

음성인식과 온라인 필기인식에서 우수한 성능을 보이는 은닉 마르코프(HMM)의 HMM의 구조는 휴리스틱 한 방법에 의해 결정되는 것이 일반적이기 때문에 최적의 모델을 선택하는데 어려움이 있다. 이에 본 논문에서는 HMM의 구조를 체계적인 방법으로 정함과 동시에 변별력의 단점을 개선 할 수 있는 방법으로 Anti-likelihood를 이용한 모델간의 변별력을 살펴보고 최적의 모델 선택 기준인 BIC와의 결합하여, 체계적이고 효율적인 최적 모델 선택이 가능한 방법론에 대해 연구하고 필기데이터에 대해 검증한 결과, 기존의 방법보다 파라미터의 수는 감소되고 인식률이 향상됨을 알 수 있다.

• Proceedings of the KIPE Conference
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• 2017.07a
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• pp.110-111
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• 2017

송전선 감지 체계를 위한 효율적인 전력 공급 장치를 제안한다. 이전에는 무시하였던 2차측 부하에 의한 영향을 고려하여 에어 갭이 없는 코어를 사용할 수 있음을 확인하였고 이를 통해 훨씬 큰 전력을 추출하였다. 분석을 통해 새로운 설계 가이드 또한 제시하였다. 실험을 통해 제안한 방식의 성능을 검증하였다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.5
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• pp.591-599
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• 2021

Rail transit agencies in Korea have been struggling to set up a performance-based rail facility maintenance plan because there are no formal definition and decision criteria for aging infrastructure. This study investigates the definition of aging infrastructure through extensive literature review and identifies benchmarking criteria through comparison with rail transit facility management systems in Korea and United States. As results, an aging infrastructure should be defined considering both service age and performance level of a facility. The priority of repair/replacement should be also determined with reasonable criteria based on relationship between service age and performance level. To determine the definition and decision criteria, a practicable classification system for aging rail transit needs to be established in accordance with classification system for performance assessment. Furthermore, a comprehensive database needs to be built including useful life, performance level, and maintenance cost of each component of rail transit. It will allow establishing an efficient budget execution plan for aging infrastructure.

• Journal of the Korea Society for Simulation
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• v.28 no.2
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• pp.131-137
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• 2019

The operation of the precision-guided missiles with seekers is becoming more and more dominant since the modern wars became geographically localized like anti-terror campaigns and civil wars. Imaging seekers are relatively low-price and applicable to various operational conditions. The image tracker, however, requires highly advanced method for the target tracking under harsh missile flight condition. Missile roll can reduce the tracking performance since it introduces big differences in imagery. The missile roll is inevitable because of the disturbance and flight control error. Consequently, the errors of the subsystems should be under control for the stable performance of the tracker and the whole system. But the performance prediction by some simple metric is almost impossible since the target signature and the tracker are highly nonlinear. We established M&S tool for a precision-guided missile with imaging seeker and analyzed the roll effects to tracking and system performance. Furthermore, we defined the specification of missile subsystems through error analysis to guarantee system performance.

• Review of KIISC
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• v.30 no.1
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• pp.43-53
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• 2020

딥러닝 기술의 발달로 인해 다양한 응용 분야에서 해당 기술 활용 시 좋은 성능을 보임에 따라 부채널 분석 분야에서도 딥러닝 기술을 적용하는 연구들이 활발히 진행되고 있다. 초기 딥러닝 기술은 데이터 분류 문제를 해결해야 하는 템플릿 공격과 같은 프로파일링 기반의 부채널 공격에 집중되어 적용되었지만 최근에는 프로파일링 기반의 부채널 분석 뿐만 아니라 상관 전력 분석 등과 같은 논프로파일링 기반 부채널 공격, 파형 인코딩 및 전처리, 부채널 누출신호 탐색 등으로 연구범위가 확대되어지고 있다. 본 논문에서는 딥러닝을 이용한 부채널 분석 기술의 최신 연구 동향을 분야별로 체계적으로 정리 및 분석하고자 한다.

• Journal of the military operations research society of Korea
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• v.36 no.2
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• pp.53-69
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• 2010

The long-term purpose of Military Acquisition Program Management (MAPM) is to fulfill requested performance, budget, and timing of military capability building. The Defense Acquisition Program Administration was established in 2006 and it adopted Integrated Control System. Moreover, there have no much studies done to examine the condition of Defense Capability Improvement Project in Korea through an empirical research although there are sixty one organizations are operating currently under Defense Capability Improvement Project. The objective of this study is to recognize Military Acquisition Program Management as a single project and to critically review relationship between Critical Success Factors (CSF) and Military Acquisition Program Management. Accordingly, three determinants to lead to successful Military Acquisition Program Management are "Communication" "User Participation" and "User Requirement." This study also demonstrates that Critical Success Factors have distinctive influences on successful Military Acquisition Program Management based on characteristic, size and phase of project. In retrospect, it is meaningful that Integrated Project Team (IPT) could classify priority of management according to characteristic, size and phase of project in the course of implementation.