• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2007년도 추계학술발표회
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• pp.109-114
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• 2007

The changed environment on marine security and the security activities such as coast guard and sea patrol in civil domain are analyzed. In order to respond diverse threats and requirements of sea petrol, the system of civil patrolman and coast guard's auxiliary are discussed. The civil boats and aircraft and civilian's security activities make an important role to enhance the effectiveness and the efficiency of coast guard and patrol.

• 시큐리티연구
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• 제1호
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• pp.175-208
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• 1997

I study the actual condition and the problem of the crime prevention system of two seoul police station. that is operated on the unit of police box, and present the new improvement. Stragic and active is the new crime prevention system that introduces a concept of community oriented policing, the tendency of a developed country police. I present a medium - sized police station where 250${\sim}$300 policemen work. It consist of a patrol division, a community division and a administration support division. The chief of police bears the responsibility only for crime prevention service by concentrating on pure Patrol - centered crime prevention activity and community relation activity. Next I present a police inspector system. The most important on this paper is the community policing officer system that a policeman bears responsibility on district apart from a patrol division and support a police service related community. To be operated these systems effectively, these need to be regulated according to a police distinct, a police purpose and it's demand. Also a scale, function, authority of a existing. Police station must be regulated and the police training must be carried out.

• 한국해양공학회지
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• 제18권3호
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• pp.44-49
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• 2004

Initial hull form of 10 G/T and 40 knots class coastal patrol boat is newly developed. The resistance performances are experimentally and numerically investigated by model test and CFD technique. The effect of initial trim and a fin attached at hull side are studied together. Wave patterns are observed to make clear the relation between the performance and the wave characteristics. It can be found that the initial trim plays a role in increasing the resistance performance above a certain velocity, and the CFD technique can be used at the initial design stage of a high-speed planning boats.

• 한국국방경영분석학회지
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• 제25권2호
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• pp.31-43
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• 1999

This paper deals with the problem of Customs trying to stop a Smuggler attempting to ship a cargo of perishable contraband(or information) across a strait within the limited period. The papers concerning these fields referred by Thomas, Baston et al, and Garnaev, have treated games dealing with one, two, and three patrol boats against one smuggler ship respectively. In this paper the author proposed a game model dealing with N patrol ships against one smuggler ship with the N boats being identical. The strategies for the gamers where games are conducted between them are shown in tables 3.3-1 and the game values thereof are in table 3.2-3. The author has exhaustively filled up the assumptions and conditions in the paper to justify the above-mentioned results so that they may not loose the generality.

• 로봇학회논문지
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• 제1권2호
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• pp.117-124
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• 2006

In this paper, we develope the navigation system for patrol robots in indoor environment. The proposed system consists of PDA map modelling, a localization algorithm based on a global position sensor and an automatic charging station. For the practical use in security system, the PDA is used to build object map on the given indoor map. And the builded map is downloaded to the mobile robot and used in path planning. The global path planning is performed with a localization sensor and the downloaded map. As a main controller, we use PXA270 based hardware platform in which embedded linux 2.6 is developed. Data handling for various sensors and the localization algorithm are performed in the linux platform. Also, we implemented a local path planning algorithm for object avoidance with ultra sonar sensors. Finally, for the automatic charging, we use an infrared ray system and develop a docking algorithm. The navigation system is experimented with the two-wheeled mobile robot using North-Star localization system.

• Journal of Astronomy and Space Sciences
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• 제36권3호
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• pp.169-180
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• 2019

In this study, a batch least square estimator that utilizes optical observation data is developed and utilized to determine geostationary orbits (GEO). Through numerical simulations, the effects of error sources, such as clock errors, measurement noise, and the a priori state error, are analyzed. The actual optical tracking data of a GEO satellite, the Communication, Ocean and Meteorological Satellite (COMS), provided by the optical wide-field patrol network (OWL-Net) is used with the developed batch filter for orbit determination. The accuracy of the determined orbit is evaluated by comparison with two-line elements (TLE) and confirmed as proper for the continuous monitoring of GEO objects. Also, the measurement residuals are converged to several arcseconds, corresponding to the OWL-Net performance. Based on these analyses, it is verified that the independent operation of electro-optic space surveillance systems is possible, and the ephemerides of space objects can be obtained.

• 물류혁신 컨퍼런스
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• 제14권3호
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• pp.271-281
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• 2006

• 한국항해항만학회지
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• 제38권6호
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• pp.585-591
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• 2014

본 논문의 주 목적은 프루드 수가 0.5 이상인 중형 경비정의 속도성능을 모형시험 이전에 CFD 결과를 바탕으로 기존의 모형시험자료를 활용하였다. 모형시험 이전에 CFD를 이용하여 선속 별로 추정된 제동마력이 주어진 엔진마력을 만족하는지를 평가 하였다. 대상선박은 선미가 서로 다른 두 가지 선형을 선정하였다. 점성 유동장 계산은 상용 CFD 코드인 STAR-CCM+를 사용하였으며, 자유수면과 자세 변화(동적 트림)를 모두 고려하였다. 알몸 선체의 저항 값은 CFD를 이용하여 추정되었다. 점성 유동 해석을 통해 두 가지 선형의 자유수면 파형, 압력분포, 한계유선 그리고 프로펠러 면에서의 속도분포를 비교하였다. 점성 유동 해석 결과를 바탕으로 두 가지 선형에 대한 유효마력 즉, 저항성능을 평가하였다. 부가물 부착에 따른 저항 증가량과 준추진효율 계수(ETAD, ${\eta}_D$)는 모형시험 자료를 활용하였다. 중형 경비정과 같은 고속선박에 관한 속도성능 추정법이 CFD와 기존 시험자료를 이용하여 개발되었다.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2004년도 학술대회지
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• pp.79-84
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• 2004

Initial hull form of 10 G/T and 40 knots class coastal patrol boat is newly developed. The resistance performances are experimentally and numerically investigated by model test at high speed circulating water channel(CWC) and CFD technique. The effect of a fin attached at hull side and initial trim are studied together. Wave patterns are observed to make clear the relation between the resistance performance and the wave characteristics. it can be found that the initial trim plays a role to increase the resistance performance above a certain velocity.

• 대한조선학회논문집
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• 제35권2호
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• pp.1-7
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• 1998

중형 고속어업지도선의 선형개발에 관한 연구를 조선대학교 회류수조에서 수행하였다. 현재 운항중인 같은 크기의 15노트 급 선형을 모선(CU-015)으로 하여 모선의 선도를 20노트 항주에 적합하도록 길이를 연장하고 선형을 변경하였으며, 고속화에 따른 선수 쇄파를 최소화 할 수 있는 선수선형 개발 및 고마력 기관에 적합한 충분한 용적을 유지하며 저항추진 성능을 향상시킬 수 있는 U-형 선미형상의 개발을 주로 수행하였다. 모선의 선형수정에 많은 제약이 있었으나 결과적으로 도출된 개발선형은 상당한 조파저항 감소의 효과가 있었다.