• Strategy21
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• 통권44호
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• pp.291-322
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• 2018

This research aims to cast light upon security characteristics of the Peace Line, which have been underestimated. To understand maritime order and maritime security policy of the Republic of Korea between 1950 and 1970, it is necessary to analyze the Peace Line as line of defence and to investigate its character This research begins with analyzation of historical facts and investigation on security characteristics of the Peace Line. It goes further to examination of legal justification of the Peace Line, which was one of international legal issues of the period, principally regarding its security characteristics. As results of the study, it could be said that the security characteristics of the Peace Line was the line of defensive waters, which set its goal mainly to prevent infiltration of communist spies. The Peace Line had practical effect as it functioned as a base line of the ROK Navy to take anti-spy operation. At the early phase of the Korea-Japan Negotiation, the Korea delegation interpreted significance of the Peace Line passively. After abrogation of Clark Line, the delegation, however, became positive to maintain the Peace Line and its security characteristics. Security characteristics of the Peace Line was recognized again, as it became the base line of special maritime zone which was made in 1972. Through analysis on international law, it is concluded that the Peace Line was fair as a part of the right of self-defense against indirect aggression. North Korea attempted indirect aggression mainly from sea way, and these might undermine peace and cause urgent and unjust damage on the ROK. Thus the ROK's action of anti-spy operation through the Peace Line can be justifiable as considering the right of self-defence. Also the Peace Line accorded with principles of necessity, immediacy and proportionality. As it was argued on the above, the Peace Line as line of defence was one of the most significant factor in the ROK's maritime security history from the Hot war against communist forces to Cold war period after Korean War and must not be underestimated.

• 대한지역사회영양학회:학술대회논문집
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• 대한지역사회영양학회 2003년도 춘계학술대회 및 비만ㆍ다이어트 박람회
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• pp.143-143
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• 2003

Reactive oxygen species are highly reactive oxidant molecules and react with cellular components, causing oxidative damages. These damages may play a significant role in the causation of several chronic diseases. Antioxidative defence systems are present in the body to protect cells from oxidative damages. The first line of defence include dietary antioxidants and enzymes such as superoxide dismutase. Cynanchum wilfordii Hemeseley has been used for centuries as a tonic nutraceutical in China and Korea. (omitted)

• 품질경영학회지
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• 제42권3호
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• pp.311-324
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• 2014

Purpose: It can deduce improvement plan that recognizes any risk factors in initial production and mass production by using FMEA and through this process, the appropriate criteria for defence items can be established. Methods: It proposes two methodology - Apply DT/OT data achieved from the beginning mass production stage based on FMECA data of the design stage, to risk management, and risk management plan that reflected line and field faliure data in case of is offered. Results: It proposes the risk management plan through Bayesian method and the risk identification that considered MTTF estimated value in case of initial production process. In case of mass production process, both risk identification by using fault occurrence frequency scores and Byaesian method, In case of the Initial production and mass production, it proposes use both two methods. Conclusion: A more realistic risk identification method can be applied, and by this method the quality improvement effect is expected.

• Strategy21
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• 통권31호
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• pp.142-163
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• 2013

Ieodo is a submerged rock within a Korea's Exclusive Economic Zone(EEZ) in the East China Sea with its most shallow part about 4.6m below the sea level which has no specific rights for the EEZ delimitation. The United Nations Convention on the Law of the Sea (UNCLOS) stipulates that any coastal state has the rights to claim an EEZ that stretches up to 200 nautical miles from its shore, except where there is an overlap with a neighboring country's claims. Korea claims that Ieodo is within its EEZ as it sits on the Korean side of the equidistant line and the reef is located on the Korea section of the continental shelf. China does not recognize Korea's application of the equidistance principle and insists that Ieodo lies on its continental shelf. According to UNCLOS, Ieodo is located in international waters, rather than one country's EEZ as the two countries have failed to reach a final agreement over the delimitation of the maritime border. This study seeks to understand the evolution of the People's Liberation Army Navy(PLAN) strategy as main obstacles for the EEZ delimitation between Korea and China. PLAN's Strategy evolves from "coastal defense" to "offshore defence", since the late 1980s from a "coastal defence" strategy to an "offshore defence" strategy which would extend the perimeter of defence to between 200 nm and 400 nm from the coast. China's economic power has increased It's dependence on open trade routes for energy supplies and for its own imports and exports. China want secure Sea Lane. PLAN's "offshore defence" strategy combines the concept of active defence with the deployment of its military forces beyond its borders. China's navy try to forward base its units and to achieve an ocean going capability. China's navy expects to have a 'Blue Water' capability by 2050. China insists that coastal states do have a right under UNCLOS to regulate the activities of foreign military forces in their EEZs. China protests several times against US military forces operating within It's EEZ. The U.S. position is that EEZs should be consistent with customary international law of the sea, as reflected in UNCLOS. U.S. has a national interest in the preservation of freedom of navigation as recognized in customary international law of the sea and reflected in UNCLOS. U.S. insists that coastal states under UNCLOS do not have the right to regulate foreign military activities in their EEZs. To be consistent with its demand that the U.S. cease performing military operations in china's EEZ, China would not be able to undertake any military operations in the waters of South Korea's EEZ. As such, to preserve its own security interests, China prefers a status quo policy and used strategic ambiguity on the Ieodo issue. PLAN's strategy of coastal defence has been transformed into offensive defence, Korea's EEZ can be a serious limitation to PLAN's operational plan of activities. Considering China'a view of EEZs, China do not want make EEZ delimitation agreement between Korea and China. China argues that the overlapping areas between EEZs should be handled through negotiations and neither side can take unilateral actions before an agreement is reached. China would prefer Ieodo sea zone as a international waters, rather than one country's EEZ.

• 한국정보통신학회논문지
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• 제25권1호
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• pp.108-114
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• 2021

무인 항공기 탑재장비 점검을 위한 통합 점검 장치는 항공기가 임무 수행을 위해 비행 전, 그리고 비행 임무를 완료하고 착륙 이후 항공기에 탑재되어 있는 장비들의 상태를 점검하기 위한 장치이다. 본 논문에서는 무인 항공기에 탑재되어 있는 전자장비에 대하여 점검자가 수동으로 장비의 상태를 점검하고, 점검 결과를 시현하는 방법과 점검자의 개입 없이 자동으로 장비의 상태를 점검할 수 있는 자동 점검 기술에 대해 기술하였다. 또한 설계된 통합 점검 장치는 점검 결과를 보고서의 형태로 출력하여 사용자가 쉽게 결과를 확인 할 수 있도록 하여 무인항공기의 고장 유무를 판단하기 용이할 뿐 아니라, 자동 점검 기능을 사용함으로써 항공기 점검자의 업무량을 줄이는데 효과적인 방법이다.

• 한국정보통신학회논문지
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• 제25권2호
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• pp.320-326
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• 2021

비행체 점검장비는 기본적으로 항공기 임무수행을 위해 비행 전/후 탑재장비의 정상유무와 상태를 점검하기 위한 장비이다. 본 논문에서는 비행체 점검장비 내 무인항공기 운용 지원을 위한 기능을 식별, 설계 및 구현하고, 최초로 비행체 점검장비의 무인항공기 운용을 위한 추가적인 활용 방안을 제시한다. 제안하는 비행체 점검장비는 항공기의 임무 계획에 따라 변화하는 임무 및 영상 탑재장비의 초기설정 및 주요 정보를 통제하고, 주요 장비의 장착 및 위치보정 을 별도 지상 운용 장비 없이 수행할 수 있다. 또한 임무 간 비상상황 발생 시 착륙 후 이를 확인할 수 있는 영상 및 고장이력 역시 비행체 점검장비를 통하여 손쉽게 다운로딩 할 수 있다. 향후 타 무인기 체계 개발 시 본 논문에서 제시한 비행체 점검장비의 운용 지원 설계 방안을 적용하면 다수의 지상 운용 지원장비를 대체하여 추가적인 설계비용 및 운용 인력을 줄이고 항공기 정비사의 편의성을 획기적으로 향상 시킬 수 있을 것으로 기대한다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2003년도 추계학술발표논문집 (하)
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• pp.1355-1358
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• 2003

본 연구는 공군에서 운영하고 있는 ASIS2000(공군보급정보체계)의 활용과 효과적인 창고관리를 위한 의사결정시스템의 설계 및 구현에 적용할 OLAP엔진을 설계 및 구현하고 창고운영자의 동선을 최소화 할 수 있는 알고리즘을 제안하는 것이다. 창고운영자의 다차원질의를 처리하여 창고운영전반에 대한 분석을 제공의 기반이 되는 OLAP엔진과 동선을 최소화하는 알고리즘의 목적 및 구성요소를 중심으로 동선최소 알고리즘을 제안한다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2001년도 추계학술발표논문집 (상)
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• pp.213-216
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• 2001

국방부문에 있어 항공에서 촬영되는 동영상들은 정보분석 측면에서 수많은 자료를 제공하고 있다. 그러나 이러한 자료는 Off-Line 상태에서 또는 국한된 네트웍에서 다루어지고 있으며, 비직관적인 텍스트 위주의 데이터로 가공되어 전파됨으로써 정보를 필요로 하는 여러 부대에 효과적으로 제공되지 못하고 있다. 본 연구에서는 항공에서 촬영된 동영상 정보를 디지털화하여 관리하기 위하여 동영상을 정보 분석 자료와 유기적으로 결합시킨 데이터베이스로 관리하고 이러한 정보를 국방망등의 인트라넷에서 이용하기 위해 자료요구 부대에서 효율적으로 동영상을 검색할 수 있는 동영상 정보 시스템을 설계하였다. 동영상 정보시스템은 검색의 다양성과 정확성을 위해 주석기반의 검색과 내용기반의 검색을 지원하는 시스템으로 설계하였다.

• 전기학회논문지
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• 제62권12호
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• pp.1725-1729
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• 2013

In this paper, the modeling and simulation of infrared absorption in an infrared absorbing structure with the cascaded transmission line model were carried out. Each layer in the infrared absorbing structure can be modeled as a characteristic impedance of the cascaded transmission line model. The simulation results show that the cavity thickness to get a maximum absorption should be less than a quarter wavelength, which is somewhat different from prevalent thickness. It can be assured that the sheet resistance of an absorbing layer to get a maximum absorption is $377{\Omega}/{\square}$, that the thickness of the absorbing layer dose not affect the spectral characteristics of absorption. It is also shown that the thickness of the active layer is not critical to the IR absorption. It can also be assured that the validation of this modeling is proved in comparison with the previous results from similar absorbing structures.

• 한국산학기술학회논문지
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• 제21권5호
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• pp.69-76
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• 2020

수중에서 방사된 음원의 신호는 해수면, 해저면 반사에 의한 다중경로 시간지연(multi-path time-delay)을 포함하여 체계(system)의 센서에 수신된다. 다중경로 환경과 복잡한 해양환경의 외란(disturbance)에 의해 수신된 신호간 상관성(coherence)이 저하된다. 따라서, 신호간 시간지연값을 이용하여 수중음원의 위치를 추정하는 체계는 추정성능의 저하가 나타난다. 이러한 환경에서도 강인한 음원 위치 추정성능을 위해 선배열(uniform line array), 평면배열(rectangular array)과 같은 다양한 형태의 센서배열과 빔형성(beamforming) 기법, 비용함수(cost-function)과 같은 신호처리를 이용하여 왔다. 본 연구에서는 선배열 형태의 doublet array와 추정된 시간지연값 보정 기법을 이용하고자 한다. 3 개의 doublet array를 동일 선에 위치하였으며 각각의 doublet array에 수신된 신호간의 시간지연값을 2 단계로 추정하였다. 수신신호에 대해 상호상관(cross-correlation) 함수를 적용하여 추정된 시간지연값을 수신신호의 중심주파수(center-frequency)와 array의 개구경(aperture) 및 수중음원과의 기하학적 관계에 따라 보정하여 최종의 시간 지연값을 얻었으며 이로부터 음원의 거리와 방위를 추정하였다. 제안한 기법의 타당성을 확인하기 위해, Monte-Carlo method를 이용하여 시뮬레이션하였다.