• Convergence Security Journal
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• v.22 no.1
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• pp.99-111
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• 2022

With current battlefield environment relying heavily on Network Centric Warfare(NCW), existing weaponary systems are evolving into a new concept that converges IT technology. Majority of the weaponary systems are implemented with numerous embedded softwares which makes such softwares a key factor influencing the performance of such systems. Furthermore, due to the advancements in both IoT technoogies and embedded softwares cyber threats are targeting various embedded systems as their scope of application expands in the real world. Weaponary systems have been developed in various forms from single systems to interlocking networks. hence, system level cyber security is more favorable compared to application level cyber security. In this paper, a secure real-time operating system has been designed, implemented and measured to protect embedded softwares used in weaponary systems from unknown cyber threats at the operating system level.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.44 no.3
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• pp.22-28
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• 2007

The STIR(Signal Tracking & Illumination Radar) in KDX(Korean Destroyer Experimental) combat system acquires target from designating 3-D target information of surveillance radar (MW-08), and The performance of radar is decided by target acquisition time and accuracy of tracking loop because the STIR tracks automatically in accordance with tracking algorithm. In the view of ship, elements related with target acquisition time of the STIR can be various. In this paper the target acquisition time of the STIR is reduced by identifying the elements and suggesting the performance improvement method. The way of performance improvement is suggested through analysing main affecting factors. First, tracking algorism is required for analysis. Second, fitness of parameters that control elements related with acquisition distance is analyzed. And the third, accuracy of ship based sensors is analyzed. In conclusion, acquisition time against ship target can be advanced to 3 seconds from 10 seconds.

• The Journal of the Korea institute of electronic communication sciences
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• v.6 no.2
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• pp.249-255
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• 2011

The level of information system interoperability of DPMS(Defense Procurement Management System) and DCMIS(defense weapon system configuration management information system) was measured. Two information systems interoperability is analyzed using measured results and the level of interoperability were estimated. The results was directed to the future improvement project of information system.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.213.2-213.2
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• 2012

우주물체 전자광학 감시체계는 빠르게 이동하는 우주물체를 지구상에서 신속하고 정확하게 관측할 수 있는 장비이다. 이 체계의 주요 부분인 광학 망원경은 직경 0.5 m의 비구면 주 반사경과 직경이 0.2 m인 비구면 부 반사경 그리고 5매의 보정 렌즈로 구성된 카세그레인 타입의 망원경으로 2도의 광시야를 갖도록 상 분석 및 미광 분석을 통하여 광학적 성능을 최적화하였다. 망원경의 광기계 구조는 설치 환경요소 및 관측 환경 요인으로 인한 광학적 변형을 최소화하도록 설계하였다. 본 논문에서는 우주물체 전자광학 감시체계의 요구조건을 만족하는 광시야 망원경의 광학계 및 광기계 구조 설계를 논의하고자 한다.

• Proceedings of the ESK Conference
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• 1993.10a
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• pp.145-162
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• 1993

조종실은 항공기-조종사 시스템에서 항공기와 조종사간의 긴밀한 상호작용이 이루어지는 유일한 공유영역으로서, 조종사의 인간성능 특성과 조종업무 특성의 체 계적 반영이 요구되어 진다. 인간공학적으로 설계된 조종실은 조종 편이성, 운용성 및 비행 안정성의 향상을 가져올 수 있다. 항공산업 육성의 초기 단계에 있는 국내 에서는 항공기 장비성능 개발 연구가 활발히 진행되고 있으나, 조종실에 대한 인간 공학적 분석 연구는 미흡한 실정이다. 조종사의 인간요소특성에 적합한 조종실 공 간을 체계적으로 설계하기 위하여, -조종실 공간 설계요소의 체계적 추출 및 계층적 구조 설정 -공간 설계에 적용될 인체측정요소의 정의 및 계층적 구조 설정, -설계요 소의 특성 파악을 위한 설계요소간 연관관계 분석, -설계요소와 인간요소간의 연관 관계 분석, -기존 전투기, 훈련기의 설계 제원 현황 및 설계지침 파악, -한국인 인체 측정자료의 Data Base화, -인간공학적인 조종실 공간 설계제원 분석을 수행하였다. 조종실 공간 설계요소로는 143 항목이 정의 되었으며, 설계요소들 간의 연관관계 Matrix 분석을 통하여 선행/병행/후행 설계요소 및 설계요소의 중요도가 파악되었다. 조종실 공간 설계에 적용될 인간 측정요소로는 133개 항목이 정의 되었으며, 설계요소 와 인간요소간의 연관관계 분석을 통하여 설계요소별로 고려되어질 인간요소를 분석 하였다. 또한 설계요소와 관련된 다른 설계요소, 인간요소 및 인체측정치, 설계지침을 종합적으로 적용함으로써 인간공학적인 조종실 공간 설계제원을 제시하였다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.868-871
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• 2008

Remodeling is an architectural activity that transforms the existing state of specific building which has been aged and clichedinto new state overcoming those aged and cliched state. Remodeling can be a means to increase building's physical lifecycle and also a countermeasure to cope with the changes in use that are from social demand, use and technical development. The performance evaluation on the remodeling tenement shall be done by understanding the performance and state of the building before and after remodeling and then it shall represent the improvement in performance objectively by comparing the differences before and after remodeling. In this aspect, we performed basic research to conduct performance evaluation on the remodeling tenement by comparing and analyzing the performance evaluation and performance certificate systems of Korea and Japan in order to suggest objective evaluation system on the change of tenement building before and after remodeling.

• Proceedings of the Military Operations Research Society of Korea Conference
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• 2005.10d
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• pp.1-34
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• 2005

함정은 수많은 장비 및 무기체계로 구성된 복합무기체계로서 장비유지비용이 타 무기체계에 비해 크며, 운용 및 교체시 막대한 국방예산이 소요된다. 본 연구의 목적인 함정교체를 위한 도태시기, 즉 함정수명 결정시 고려요소로서는 첫째, 전략, 전술상의 요소 둘째, 장비의 성능 요소 셋째, 운영유지비의 비용 요소 넷째, 군수지원상의 문제 다섯째, 예산상의 문제 등이 고려된다. 그러나 본 연구는 함정이란 복합무기체계의 수명을 결정하는 요소 중 정책적인 고려사항 등은 제외하고, 경제성 측면을 고려한 함정의 수명을 추정, 제시한다. 연구 절차는 무기체계 획득단계에서 경제성 평가를 수행하기 위한 방법으로 앞으로 도입될 장비에 대한 수명주기비용을 추정하고, 그 결과를 활용하여 장비의 경제수명을 결정할 수 있는 방법을 제시하였다. 즉, 현재 국방 분야에서 비용추정을 위해 널리 사용되고 있는 PRICE 전산모델을 이용하여 운영유지비용을 포함한 수명주기 전반에 대한 항목별 비용을 추정하는 방법을 제시하고, 이 자료를 바탕으로 경제수명 결정 모형 중 적합하다고 판단된 등가 연간 비용방법을 적용하여 등가 유지비용과 자본회수비가 최소가 되는 시점을 장비의 경제수명으로 결정한 것이다. 제시된 절차를 이지스 구축함(KDX-III)에 적용하여 경제수명을 결정한다. 본 연구에서 제시된 방법을 통해 보다 과학적이고 경제적으로 함정의 도태시기를 결정하는데 사용함으로써 국방예산 절감에 기여하게 될 것으로 판단된다.

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.586-596
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• 2011

In the IT industry, processing units of IT applications are getting smaller and high efficient. Furthermore, the realization of various smart functions is highly feasible now due to advances in sensing technology. The service infrastructures on high efficient and compact mobile devices are applied to various areas. These also could be possessed by users and is built into the devices. Currently, studies on the UX(User Experience) field to attempt an analysis and prediction of user's information are continuing with reference to the UI(User Interface). However, research on the common framework of classification and storing the user-information, and standardization of form has not been attempted yet. In this study, we proposed the AUX(Associative user Experience) model and process structure to store various empirical data by users. The AUX model expressed a diversity of user's empirical data using extended E-TCPN model. And also, we expressed the data structure using XML with reference to the application of AUX model. This expressed model and separation of process structure guarantee its specialty, productivity and flexibility through the humanistic characteristics of users and the independence of technical process structure. The AUX model maps out the AUX information process architecture and expressed the process with the improved MPP algorithm, to analyze of its performance. The simulation of movements applying to MPP traffic allocation of VOD is used to analyze of its performance. The playback deviation of MPP Graphic Allocation Algorism where the AUX model was applied was improved by 10.41% more than the one where it was not applied. As a result of that, playback performance has improved due to the conversion of AUX with accessing media, content of users and dynamic traffic allocation such as MPI and CPI.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.384-388
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• 2004

In this paper, we analyses transmission performance of synchronization pattern for over the air rekeying in aerial tactical link of LINK16, when it is given by symbol error rate, in respect of pattern detection probability and false alarm probability.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.41 no.9
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• pp.726-733
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• 2013

The rotor blade of helicopter is the core component determining helicopter performance and requiring low noise and low vibration because the blade becomes the major source of noise during flight. The performance analysis of candidates rotor blades is very critical because LCH(Light Civil Helicopter) will be developed parallel with LAH(Light Armed Helicopter) as an international upgrade program based on the existing platform of foreign civil helicopter. This research was aimed to recognize the performance of the candidates rotor blades compared with the newly developed foreign rotor blades and to investigate the feasibility about developing korea unique shape rotor blades by analysis the rotor performance and noise. The result of this research can be used for the target performance index during negotiation with foreign helicopter company and developing korea unique shape rotor blades.