• Journal of National Security and Military Science
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• s.13
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• pp.109-136
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• 2016

Define the importance and role of the acquisition strategy based on the Defense Acquisition Management System, diagnose and analyze the actual state of document preparation. We analyzed the timing and details of the basic strategy of the project in 2015 and suggested a supplementary plan to improve the efficiency of Military force improvement projects in conjunction with the Defense Planning and Management System. It is necessary to reduce the preparation period including the policy decision making process and then divide it into planning and programming stages to complement the role of acquisition strategy. In order to apply these improvements, the necessary revision of laws and regulations to be reviewed is referred to, enabling continuous research.

• TTA Journal
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• s.127
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• pp.30-36
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• 2010

사람이 현실에서 공간감과 거리감이 있는 3차원 세계를 인지하고 주변 대상들과 상호 작용을 하면서 생활하는 것은 너무나도 자연스러운 것으로 받아들여지고 있습니다. 그러나 지금까지 현실 세계의 정보를 전달하는 영상 매체는 모두 평면적인 2D 영상에 머물러 있었으며, 3DTV는 기존과 달리 현실과 동일한 3차원 입체영상을 TV방송을 통해 전달하고자 하는 기술입니다. 3DTV 입체방송은 흑백TV에서 컬러TV로의 변화와 같이 영상 매체의 큰 변혁을 몰고 올 차세대 서비스로 주목 받고 있습니다. 또한 그 기반이 되는 3D 입체영상 기술은 TV방송뿐만 아니라, 게임, 교육, 의료, 산업 설계, 탐사 및 국방 분야에 이르기까지 매우 다양한 분야에 적용되어 기존과는 차별되는 성능과 경험을 제공하게 될 것이며, 잠재적인 산업 파급효과가 대단히 클 것으로 기대되고 있습니다. 이러한 3DTV 방송의 활성화를 위해서는 디스플레이, 콘텐츠 및 서비스 인프라를 포함하는 eco-system이 잘 조정되어야 하며, 특히 시각 피로 및 시각안전성과 같은 인간공학적인 측면에서 연구 및 관련 표준화가 뒷받침되어야 합니다. 3DTV 기술은 초기의 안경 착용이 필요한 스테레오 3DTV로부터 지속적으로 발전하여 장기적으로 안경 착용이 필요 없는 다시점 또는 홀로그래픽 3DTV가 실현될 것이며, 이에 대비한 기초기반 연구도 꾸준히 병행되어야 할 것입니다.

• Electronics and Telecommunications Trends
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• v.23 no.1 s.109
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• pp.33-43
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• 2008

최근 통신망과 모바일 디바이스의 급진적인 진화에 맞물려 가전분야의 휴대단말기 산업을 포함하여, 비 IT 분야의 미래 유망산업으로 분류되는 자동차, 의료, 선박, 국방 및 항공기 산업에서도 사용자 단말 및 시스템 내부의 구성요소들에게 이동체 내에서 인터넷과의 끊김 없고 안정적인 통신이 보장되는 서비스를 제공하기 위한 기술들이 요구되고 있다. 이러한 요구에 적절히 대응할 수 있는 기술이 모바일 게이트웨이이며, 최근 멀티홈드(multi-homed) 모바일 게이트웨이를 지원할 수 있는 다양한 기술 표준이 활발히 제정되고 있다. 이에 본 고에서는 모바일 게이트웨이 시장 동향, 끊김 없는 망 연동기술 표준 및 네트워크 이동성 제공 표준 동향에 대해 살펴본다.

• The Bulletin of The Korean Astronomical Society
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• v.36 no.1
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• pp.66.2-66.2
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• 2011

2010년11월 23일 14:00 북한의 연평도 포격사건 이후 주야간으로 원거리 적을 감시하거나 미확인 표적을 확인 할 수 있는 장비가 필요하다고 생각되어진다. 한국천문연구원은 그 동안 천체관측을 목적으로 시민천문대 및 연구용으로 60cm급 광학망원경과 위성용 적외선망원경과 카메라를 개발하여 왔다. 이 기술을 이용하여 군에서 활용할 수 있는 주야간 대구경 감시 시스템을 개발 할 수 있으리라 본다. 또한 개발 한다면 대적 감시능력을 강화할 것이며, 국방의 핵심기술을 확보하리라 생각되어진다.

• Journal of the Korea Institute of Military Science and Technology
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• v.22 no.5
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• pp.625-636
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• 2019

Recently, research on projectiles with wings for precision guidance is actively underway. In this study, we analyzed how the tail fins attached to the projectile affect the base drag. Aerodynamic analysis was performed with RANS(Reynolds Averaged Navier-Stokes) equations using FLUENT, a commercial CFD(Computational Fluid Dynamics) code. Through the aerodynamic analysis, the base drag characteristics of the projectile by parameters (number, length, thickness, position, shape of tail fin) were investigated. The results of this study are expected to be applicable to aerodynamic design of tail fins mounted on projectiles.

• Journal of the Korea Institute of Military Science and Technology
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• v.22 no.3
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• pp.408-415
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• 2019

Basically the dynamics of the fixed-wing aircraft is based on the airspeed which is relative to the wind, but when it comes to the track guidance and control, ground speed is the factor to be considered. Especially in the case of low-speed fixed-wing unmanned aerial vehicles the difference between the airspeed and the ground speed is significant depending on wind conditions, so that the heading control and the course control have to be designed separately. This paper represents the course control method using the pre-designed heading control gains which meet the desired characteristics. Also, waypoint guidance and control algorithms are suggested applying this control method. Finally the robustness of the proposed method is confirmed by 6-DoF nonlinear simulation.

• Journal of the Korea Institute of Military Science and Technology
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• v.24 no.3
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• pp.309-316
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• 2021

In this paper, the electrical power output of the micro-combustor thermophotovoltiac(TPV) system was analyzed. The system consists of a micro-combustor, photonic crystals(PhCs), and photovoltaic cells(PV cells). The system has a micro-combustor that can achieve over 1,000 K surface temperature by consuming 2.5 g/h hydrogen fuel. Also, this system incorporates current state-of-the-art PhCs surfaces(2D Ta PhCs and Tandem Filter) to increase electrical power output. In addition, InGaAsSb PV cell, which bandgap is 0.55 eV, was applied to convert a wide range of radiative energy. The performance analysis shows that a single micro-combustor TPV system can produce 0.4 W ~ 27.7 W electrical power with the temperature change of emitter(900 K ~ 1,500 K) and PV cell(250 K ~ 400 K).

• Journal of the Korea Institute of Military Science and Technology
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• v.24 no.2
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• pp.151-164
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• 2021

With the gradual increase in the ROK naval power, it is an undeniable fact that the time of operation in the ice-infested area will be necessary in the near future. Recently, cases of ice formation around Korean waters in wintertime have been frequently reported. However, in the case of the ROK naval vessels to date, it is a fact that the ice-strengthened perspective has not been considered from the design stage. In this study, the capability of operation in the ice-infested area of the ROK naval vessels, which did not take into account the ice-strengthened design, was reviewed through the evaluation of the vessel's structural integrity in accordance with the sea ice conditions.

• Journal of the Korea Institute of Military Science and Technology
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• v.25 no.4
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• pp.355-363
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• 2022

Development of supersonic flying vehicle is one of the most latest issue in modern military technology. Specifically, structural integrity of supersonic flying vehicle can be verified by high temperature structural test. High temperature structural test is required to consider thermal load caused by aerodynamic heating while applying structural load simultaneously. Tubular quartz lamps are generally used to generate thermal load by emitting infrared radiation. In this study, modified heat flux model of tubular quartz lamp is proposed based on existing model. Parameters of the proposed model are optimized upon measured heat flux in three dimensions. Finally, thermal load of plate specimen is designed by the heat flux model. In conclusion, it is possible to predict heat flux applied on plate specimen and desired thermal load of high temperature structural test can be obtained.

• Journal of the Korea Institute of Military Science and Technology
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• v.25 no.5
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• pp.522-529
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• 2022

In this paper, an experimental study on the control of the plume deflection panel(PDP) with a support jack of the ground launching platform using a tilt angle sensor is described. To overcome the disadvantages of the existing PDP control without a support jack using a limit sensor, the control algorithm using a tilt angle sensor and the ferroelectric RAM in the Launcher Control Unit for recognizing the contact with the ground in an abnormal operation is proposed to control the PDP in various operation environments. Finally, the proposed algorithm can be well applied for not only heavy-load launching platforms but also any other similar systems.