• 한국IT서비스학회지
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• 제20권6호
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• pp.151-162
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• 2021

Since 2012, the Navy has been conducting a defense experiment project to evaluate the possibility of military application by introducing new technologies related to excellent private informatization in the defense field. There are many projects that have spread because they are suitable for military use, but some have ended as experimental projects themselves because they do not meet the military's required performance. Continuous development is required as increasing the spread rate by successfully carrying out defense experiment projects is the basis for defense reform. This study analyzed the performance of major projects carried out by the Navy and presented considerations for the development of defense experiment projects to be carried out by the Navy in the future. The main achievements were derived in various ways in terms of project performance and system operation, and the considerations can be summarized in the field of raising business requirements, securing resources for system operation, determining the size of companies for project execution, and security measures. The research results can be used as data to determine the required defense experiment project and efficiently carry out the project.

• Korean Chemical Engineering Research
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• 제44권6호
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• pp.636-643
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• 2006

연속식 SCWO 반응기를 이용하여 DMMP의 초임계수 산화반응을 반응온도 $440{\sim}540^{\circ}C$, 반응압력 242 bar, 체류시간 10~26 초, 과잉산소량 -40~200％의 조건 하에서 수행하였다. 반응온도 $540^{\circ}C$에서 DMMP 분해율은 99.7% 이상으로 높았으며, DMMP의 농도가 증가함에 따라 DMMP 분해율은 증가하였다. 산화제 농도 변화에 따른 분해율은 양론비 이하에서는 현저하게 영향을 받았으나, 양론비 이상에서는 큰 차이가 없었다. DMMP 분해율이 85% 이상인 30개의 실험결과로부터 DMMP의 초임계수 산화반응 속도식을 도출하였다. Pre-exponential factor는 $(1.10{\pm}0.76){\times}10^6$, 반응 활성화에너지는 $90.66{\pm}3.87kJ/mol$, DMMP와 산소에 대한 반응차수는 각각 $1.02{\pm}0.03$, $0.32{\pm}0.03$로 모델에 의한 예측값과 실험값은 잘 일치하였다.

• 한국항공우주학회지
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• 제49권11호
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• pp.933-940
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• 2021

위성탑재 영상레이다 시스템은 마이크로파를 방사하여 지상에서 되튕겨온 신호를 수신한다. 수신된 신호는 영상레이다 수신경로의 마지막에 위치한 디지털 수신기에서 디지털 신호로 변환된다. 변환된 디지털 신호는 필터링, 압축 및 포맷팅 과정을 거친다. 디지털 수신기의 신호처리 과정은 두 차례의 양자화로 수행된다. 첫 번째는 아날로그 신호를 디지털 신호로 변환하는 과정이고, 다른 하나는 BAQ를 이용한 압축과정이다. 양자화는 높은 비트에서 낮은 비트로 변환하는 과정으로 양자화 오차가 발생한다. 본 논문에서는 SNR 저하의 관점에서 디지털 수신기에서 수행되는 양자화의 영향성을 분석하였다.

• 품질경영학회지
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• 제51권2호
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• pp.185-202
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• 2023

Purpose: The purpose of this study is to identify key performance evaluation items and factors that are effective and practical for project management of defense standard standard improvement projects, and to develop a quantitative performance evaluation model. Methods: For the development of a performance evaluation model for defense standard improvement projects, we analyzed past major project performance and derived evaluation items and factors. To increase the objectivity and efficiency of project evaluation, we developed an evaluation index that enables relative evaluation of evaluation targets, and calculated the main importance of evaluation items using the Analytic Hierarchy Process (AHP) method based on the main opinions of expert groups. Results: The study resulted in the identification of main performance items for defense standard improvement projects, which were classified into defense standard conformity review performance and defense standard improvement performance items. We also simplified the evaluation model by integrating various evaluation items into similar evaluation factors. Additionally, we developed a quantitative evaluation index that enables relative evaluation of the targets and verified the objectivity and validity of the suggested performance evaluation model by reevaluating it using performance data from past commissioned professional institutions Conclusion: Developing a quantitative evaluation model for defense standard improvement projects is expected to provide a means of measuring the effectiveness of the project, and to be used as a tool to determine the appropriateness and effectiveness of medium and long-term project plans.

• 전자통신동향분석
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• 제35권6호
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• pp.56-67
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• 2020

The core technologies of the 4th Industrial Revolution, such as artificial intelligence, the Internet of Things, the cloud, big data, and mobile networks, are inspiring major changes and innovations in the defense sector worldwide. The United States, China, and Russia are pursuing defense research and development strategies that seek to maintain their leadership on the battlefield in the future through the overwhelming superiority of defense science technology. Defense science and technology concentrate on the development of challenging new disruptive technologies to efficiently respond to future battlefield environments, where the immediate process of determining the outcome of a war will lead to combat power. In this paper, we first look at the development strategies of the 4th Industrial Revolution in major countries and describe the latest trends in defense science and technology accordingly.

• 한국군사과학기술학회지
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• 제19권6호
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• pp.744-751
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• 2016

Interoperability tests are required to determine whether network-based defense systems successfully share and exchange certain services, information, and data. We must examine various aspects of interoperability. The DITA (Defense Information Technical stAndard) is the basis for interoperability. However, DITA is being applied to the defense system in a state that the standard test methods and procedures are not established. And there is no test method and procedure of the DITA well applicable to military weapons systems or information systems. Therefore, in this paper, we propose a framework that includes procedures, methodologies, so as to test whether a standard is applied to the DITA in terms of Standard Conformance Test.

• 시스템엔지니어링학술지
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• 제3권2호
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• pp.9-16
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• 2007

To Manage the Defense Acquisition Process more efficiently, DAPA has looked over the applying SE process to the Eagle Acquisition Program. Based on comparing 'Requirement' with 'items suggested in the proposal' in RFP and analyzing the result by using Cradle, those items have been discovered with IPT, actualized and corrected. In addition, the computerized data base system makes easier to trace all changed and more efficiency to manage programs. Therefore, this study using SE in other acquisition program.

• 시스템엔지니어링학술지
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• 제19권2호
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• pp.117-125
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• 2023

Systematic performance evaluation of the Defense Acquisition Program is very important, since they are directly related to national security. In this paper, we reviewed various performance evaluation models from a methodological perspective for pragmatic performance evaluation, and the limitations of each model. In order to evaluate the performance of the Defense acquisition program efficiently, especially for the Naval ship Projects and considering their unique characteristics, both various stakeholders' participation, standard indicators for performance measurement, and tailoring them considering the projects' circumstances are necessary. We also propose indicators, contents, and detailed criteria example for the Requirements management. This approach enables a pragmatic and consistent evaluation of defense projects, and through this, meaningful insights could be acquired with accumulate data.

• 한국군사과학기술학회지
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• 제19권1호
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• pp.43-49
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• 2016

This paper addresses the problem of the software update or upgrade of embedded equipments on a missile assembly with booster. Because the embedded equipments are assembled delicately and closely one another with various communication and power cables, they should be very carefully disassembled to directly upgrade the software of a certain embedded equipment. This may cause not only the costs for disassembly and reassembly but also additional tests to verify the completeness of the reassembled missile as a missile assembly with booster. This paper presents an indirect data transfer technique based on MIL-STD-1553B through Guidance Control Unit to easily upgrade the software of other equipments without any additional costs caused by disassembly and reassembly. The presented technique was successfully applied to the software upgrade of various equipments on real missile assembly with booster.

• 한국산학기술학회논문지
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• 제22권1호
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• pp.285-293
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• 2021

군수품 최초양산품 품질관리는 연구개발 이후 최초로 양산 계약된 군수품을 대상으로 개발 후 완성된 규격에 따라 개발품의 양산 실현 가능성과 적합성 평가를 목적으로 수행한다. 하지만 본 연구를 통한 무기체계 최초양산품 소프트웨어 품질보증을 수행하기 이전까지 최초양산품 품질보증은 하드웨어 중심으로 수행되어 소프트웨어에 대한 품질보증은 미흡한 상태였다. 이로 인해 후속 양산단계에서 소프트웨어의 문제점들이 발견됐을 경우 불가피한 기술변경에 따라 많은 시간과 비용이 소요되었다. 본 논문에서는 소프트웨어 기술자료의 충분성 및 적합성을 점검하기 위한 무기체계 최초양산품 소프트웨어 품질보증 프로세스 연구를 수행한 결과를 보인다. 그 결과 컴퓨터 파일의 완전성 점검, 소프트웨어 기술문서의 적합성 점검, 소프트웨어 기술자료와 그 외 국방규격의 연계 여부를 점검하는 프로세스를 정립하고 이 프로세스를 적용하여 최초양산품 소프트웨어 품질보증을 수행한 결과를 분석하여 최초양산품 소프트웨어 품질보증 프로세스의 효용성을 보인다. 소프트웨어 기술자료의 완전성을 확보하여 양산단계에서 발생할 수 있는 소프트웨어 문제점을 사전에 식별하여 소프트웨어의 선제적인 품질 확보에 기여할 수 있음을 보인다.