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장택수,나범철,홍동호,박근국,Jang, Taeksoo,Na, Beomcheol,Hong, Dongho,Park, Keunkuk 한국군사과학기술학회 2020 한국군사과학기술학회지 Vol.23 No.5
When we develop an OpenGL-based coastline map that displays the high resolution data of GSHHG, it takes tens of seconds until the first scene is rendered. That is because it takes time to tessellate polygons with a huge number of vertices. A commonly used solution is that it converts original data to a customized data in advance, and it displays these. But if we should use original data to display a coastline map, we need to find another solution. In this paper we suggest using a polygon splitting technique to minimize tessellation time. In order to prove its effectiveness, we implemented a software applied this technique and measured its performance. The software applied this technique took a few seconds to display the first scene and we confirmed its effectiveness.
스케줄링 가능성 분석을 통한 무장모의기 확장 설계 및 분석
장택수,김용호,나범철,박근국,Jang, Tasksoo,Kim, Yongho,Na, Beomcheol,Park, Keunkuk 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.3
The most important things in real-time systems are that a system guarantees to meet its deadline and to operate in its predictable range. When we design a real-time system, we need to verify whether the system can meet its deadline through schedulability analysis. There are several kinds of schedulability analysis technique for fixed priority scheduling systems. But as we all know, we can't perform schedulability analysis in design time because we can't estimate upper bounds on execution time of each task. So we used a similar real-time system to estimate upper bounds on execution time for our system, and then we performed schedulability analysis and verified that our system designed can meet its deadline.
함정 전투체계의 다수 고속 표적에 대한 위협평가 및 무장할당 알고리즘 제안
이세준(Sejun Lee),신일섭(Ilseob Shin),한창현(Changhyun Han),나범철(Beomcheol Na) 한국해군과학기술학회 2024 Journal of the KNST Vol.7 No.1
In this paper, we propose the threat assessment and target-weapon allocation in naval combat management system. The threat value for ships is calculated using the target distance, azimuth, velocity, and altitude. It is assumed that weapon-to-target engagement would take place in one-on-one correspondence using the defensible range of the weapon in ship. It can be more accurate and reliable threat assessment is achieved by calculating the threat value according to the characteristics of the weapon. It is expected to be used to other system as well.