• Defense and Technology
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• no.11 s.261
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• pp.54-61
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• 2000

과학과 기술의 발달로 급격히 발전하는 무기체계와 전략전술은 현대전의 양상을 과거의 대량물량전과는 달리 최단기간에 최대의 전과를 거둘 수 있도록 "속전속결" 중심으로 변화되었다. 이러한 속전속결전의 생명은 신속한 제공권 장악과 그에 따른 입체 기동전에 의한 기동력 확보이다. 제공권 장악에 있어 전투기의 미비점을 보완해오던 헬기는 잇따른 첨단장비와 기술 개발로 지상전의 핵심전투력인 전차의 기능에까지 그 영역이 확대되는 추세에 있으며, 전차의 정체성에 대해 재고의 필요성을 요구하게 되었다. 과연 헬기는 전차를 대체할 수 있는가? 이 글은 헬기와 전차 기술개발의 현재와 미래를 살펴보고, 각각의 기능 및 운용을 면밀히 분석하여 그 발전개념의 타당성을 검토하였다.

• Defense and Technology
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• no.12 s.262
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• pp.50-57
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• 2000

과학과 기술의 발달로 급격히 발전하는 무기체계와 전략전술은 현대전의 양상을 과거의 대량물량전과는 달리 최단기간에 최대의 전과를 거둘 수 있도록 "속전속결" 중심으로 변화되었다. 이러한 속전속결전의 생명은 신속한 제공권 장악과 그에 따른 입체 기동전에 의한 기동력 확보이다. 제공권 장악에 있어 전투기의 미비점을 보완해오던 헬기는 잇따른 첨단장비와 기술 개발로 지상전의 핵심전투력인 전차의 기능에까지 그 영역이 확대되는 추세에 있으며, 전차의 정체성에 대해 재고의 필요성을 요구하게 되었다. 과연 헬기는 전차를 대체할 수 있는가? 이 글은 헬기와 전차 기술개발의 현재와 미래를 살펴보고, 각각의 기능 및 운용을 면밀히 분석하여 그 발전개념의 타당성을 검토하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.57-60
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• 2007

국방 연구개발은 사용군의 요구사항을 만족시키는 무기체계를 최단 기간, 최소 비용 및 고품질로 개발하고자 노력하고 있으며, 통합 무기체계 데이터베이스 전산 환경 하에서 체계공학 및 동시공학을 체계적으로 구현하기 위한 연구개발 프로세스 및 도구들이 개발되고 있다. 항공 무기체계 분야에서 본 논문의 연구개발 과정에서 생성되는 기술 자료를 효율적으로 관리하기 위한 웹기반 체계운영관리시스템을 개발 및 운용하고 있으며, 기존 항공 무기체계 연구개발 사업에 적용하여 그 효율성을 입증 및 검증하였다. 이에 본 논문에서는 통합 무기체계 데이터베이스 기반으로 향후 개발 예정인 보라매 사업, 무인항공기 및 무인전투기에 적용 가능한 통합 연구개발 프레임웍(Framework) 및 체계운영관리시스템의 발전 방안에 대해서 기술한다.

• Journal of Internet Computing and Services
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• v.8 no.4
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• pp.105-117
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• 2007

In order to succeed in a bid or development, the project manager should estimate its cost and schedule more accurately in the early stage of the project. Usually, the nominal schedule of most projects can be derived from rule of thumb, first-order estimation practice, or ball-park schedule estimation table. But the rule-of-thumb models for the nominal schedule estimation are so various, and the first-order estimation practice does not provide sufficient information. So they do not help much to decide on the proper development effort and schedule for a particular size of project. This paper presents a statistical regression model for deciding the development effort and schedule of a project using the ball-park schedule estimation table. First, we have redefined such words suggested in the ballpark schedule estimation table as shortest possible schedule, efficient schedule and nominal schedule, Next, we have investigated the relationship between the development effort and the schedule. Finally, we have suggested a model for estimating the development effort and the more accurate schedule of such particular sizes of software as are not presented in the ball-park schedule estimation table. The experimental results show that our proposed regression analysis model decreases the mean magnitude of relative error by 2% at maximum. Also this model can estimated the development effort and schedule for a particular size of software.

• Journal of the Korea Society of Computer and Information
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• v.12 no.1 s.45
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• pp.269-276
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• 2007

National defense research and development is trying to develop the weapon system to satisfy users' requirements at minimum cost, high quality and the shortest period. Under integrated database computer environments, development processes and tools have been developed to implement system engineering and concurrent engineering systematically. In the aerospace defense weapon system, the fixed wing development department has developed and operated the integrated operation and management information system based on web technology to manage efficiently the technical information generated by the R&D process. When this system was applied to the existing R&D project for the aircraft weapon system, it proved and verified its efficiency. In this paper, we describe the future development plan of an integrated R&D framework and an integrated weapon system database based on the integrated operation and management information system which are able to centrol the technical information of KF-X, UAV(Unmanned Aerial Vehicles) and UCAV(Unmanned Combat Aerial Vehicles) programs. We also describe an interoperability and integration plan with WISEMAN which will be operated soon in our research Institute.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.439-439
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• 2022

인공위성은 위성통신, 기상 등 다양한 분야에서 활용되고 있지만 재난과 위성영상 특성 매칭의 제약으로 재난 상황에서는 제한적으로 사용되었다. 국내외 위성 갯수의 증가로 위성영상을 준-실시간으로 확보 가능함에 따라 활용할 수 있는 범위가 증가하여 최근에는 재난·재해에 신속하게 대비하기 위한 연구가 활발히 진행되고 있다. 본 연구는 재난 발생 지역의 위성 영상 확보를 위해 촬영된 영상과 미래시점의 촬영 예정인 영상의 촬영 예정 시간 및 영역을 빠른 시간 내 분석하여 최적 위성영상 확보에 기반이 되고자 한다. 행정안전부에서 분류한 재난·재해 유형에 따라 재난 예측, 탐지, 사후처리를 위한 위성자료의 확보를 위하여 다양한 위성과 탑재된 센서들의 궤도, 공간 해상도, 파장대 등의 위성영상의 적시성을 분석하여 최적 위성을 정의하였다. 위성 궤도 시뮬레이션은 TLE(Two Line Element) 정보를 이용하는 SGP4(Simplified General Perturbations version 4) 모델에 적용하여 개발하였다. 최신 TLE 정보를 이용하여 위성 궤도 정보 및 센서 정보(공간 해상도, Swath width, incidence angle IFOV 등)을 적용하였다. 수집된 위성 궤도 정보를 기반으로 위성의 궤도를 예측하여 예측된 위치에서의 촬영 영역을 산정하는 분석 기능을 수행하여 최종 시뮬레이션 데이터를 생성한다. 개발된 위성 궤도 시뮬레이션 알고리즘을 토대로 태풍 미탁 사례에 적용하였다. 위성 궤도 시뮬레이션 알고리즘을 태풍 미탁 사례에 적용한 결과 다종 위성리스트 중 위성 궤도 분석을 통해 최단기간 획득 가능한 위성 중 정지 궤도 기상위성인 Himawari-8, GK-2A는 태풍 경로 모니터링, 광학 위성인 Sentinel-2, PlanetScope는 건물 피해 지역, SAR 위성인 Sentinel-1, ICEYE는 홍수 지역을 탐지하는데 최적 위성 영상으로 분석되었다.

• Journal of the Society of Naval Architects of Korea
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• v.32 no.1
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• pp.9-16
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• 1995

The erection process planning is to decide erection strategy and sequence that satisfies dock duration. The erection scheduling is to decide erection date of each block. The load profile varies according to scheduling and it is related to building cost. It must be possible to simulate the various combinations of process plan and schedule for optimal planning. To develop the process planning system for optimal planning, the system that generate the sequence of erection automatically and the load leveling system are required. This paper suggests the method that generates the erection sequence. The load leveling should be done to all the ships in the same dock batch to get reliable results. In this case since the search space is very large, efficient optimization method is needed Our research achieved the load leveling system using Genetic Algorithm. This system made it possible to simulate various process plans to which schedule is considered.

• Journal of Korea Spatial Information System Society
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• v.8 no.1 s.16
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• pp.107-118
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• 2006

In this paper, several network algorithms were tested to find an optimal one for telecommunication network design. Algorithms such as Dijkstra's shortest path algorithm, Ford-Bellman's shortest path algorithm, Prim's minimum spanning tree algorithm, and Kruscal's minimum spanning tree algorithm were reviewed and compared in terms of feasibility and resulted network construction cost. Then an optimal algorithm that is most suitable for telecommunication network design was selected. For more specific and quantitative analysis of the selected algorithm, it was implemented to a real telecommunication network construction site. The analyzed results showed that the suggested design method when compared with the conventional one, reduced the network construction cost considerably. The total network length estimated by the conventional method were 5267 meters while the suggested method resulted in 4807 meters. Thus the new method reduced the total network length by 8.7 percent which is equivalent to 97,469,000 Won of construction cost. Considering the frequent telecommunication network constructions, due to new urban developments in the nation, the economic benefit of the suggested telecommunication network design method will be significant. In addition to the construction cost savings, the suggested telecommunication network design procedure possesses several other economic benefits. Since the design procedure can be standardized and automatized, it can reduce the design cost itself and the skill acquirement periods required for new or inapt design crews. Further, due to the standardized and automatized design procedure, any telecommunication network design results can accessed more objectively.

• Korean Journal of Construction Engineering and Management
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• v.21 no.5
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• pp.20-28
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• 2020

In construction project, an error in quantity information immediately leads to an error in the quotation, highly reliable quantity calculation is required for successful performance of a project. But there is a difficulty in the current situation for the person in charge to review all calculation sheets for quantity review as the quotation work has to be performed in a short period of time. Accordingly, it is thought that a review plan is required to secure reliability on calculated results and the review plan should be able to be carried out within insufficient quotation periods. In the present paper, it is intended to present a plan that enables quantity to be reviewed with the minimum number of persons within the shortest period of time through an algorithm of calculating a verification quantity. The suggested algorithm allows the result of quantity calculation work carried out earlier based on 2-dimensional drawing to be compared, not with an accurate quantity, but within an error range.

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.7
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• pp.956-961
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• 2011

This study was conducted to evaluate the possible subacute toxicity of gamma-irradiated dried bibimbap. The dried bibimbap was irradiated at the dose of 30 kGy at room temperature. For the animal study, the male and female ICR mice (8 mice per group) had the diet with AIN39G as control and dried bibimbap 30 kGy irradiated and non-irradiated for three months. During the experimental period, the group with 30 kGy irradiated bibimbap did not show any changes in appearance, behavior, mortality, body weight, organ weight, and food consumption compared to the control. Also, all of the biochemical parameters were observed in the normal ranges. In histopathological examination including hematological and serum biochemical analyses, there were no significant differences among the control and 30 kGy irradiated dried bibimbap groups. These results indicate that irradiation of bibimbap up to 30 kGy did not cause any toxic effects and could be applied for the development of safe ready-to-cook food.