• Journal of Satellite, Information and Communications
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• v.12 no.4
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• pp.87-94
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• 2017

The broadcast service environment is changed to the complicated equipment configuration of the server and network-based for the advanced technology application and various service providings. The broadcasting market is growing rapidly by the development of broadcasting environment. But as to the domestic production broadcasting equipment industry, the satisfaction of request of the consumer and market competitive power is showing the limit due to the development of the single focused on goods and sale. This research gathered the opinion of the broadcasting technology experts and investigated the reality of usage of the domestic device in the broadcasting system. And according to the investigation result we discovers the hybrid system model that synergy can come out in which the domestic device more than 2 combines out and there is the purpose.

• Journal of Advanced Navigation Technology
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• v.19 no.2
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• pp.133-139
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• 2015

This paper surveys vision based autonomous navigation technologies for unmanned systems. Main branches of visual navigation technologies are visual servoing, visual odometry, and visual simultaneous localization and mapping (SLAM). Visual servoing provides velocity input which guides mobile system to desired pose. This input velocity is calculated from feature difference between desired image and acquired image. Visual odometry is the technology that estimates the relative pose between frames of consecutive image. This can improve the accuracy when compared with the exisiting dead-reckoning methods. Visual SLAM aims for constructing map of unknown environment and determining mobile system's location simultaneously, which is essential for operation of unmanned systems in unknown environments. The trend of visual navigation is grasped by examining foreign research cases related to visual navigation technology.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.03a
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• pp.87-87
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• 2011

파일 직물은 높은 기공성과 유체흡수 및 보온성이 뛰어나, 타월, 행주와 같은 청소직물 뿐 아니라 침장 및 의류용 소재에도 널리 사용되고 있다. 최근 경편분야에서 극세사를 이용한 제품이 다양한 용도로 적극 활용되고 있으며 환편 제품으로 가볍고 터치감이 특징인 Polar Fleece가 저렴한 가격으로 소비자들의 관심이 증대되고 있다. 이러한 소비시장을 고려해 볼 때 이 두 가지가 함께 공존하는 제품 개발이 절실하지만, 극세사 제품은 트리코트 경편제품이고 Polar Fleece로 활용하는 제품은 환편에서 후가공 기술을 응용한 제품으로 생산기계와 가공공정이 다르며, EF Velboa와 Polar Fleece 2종류 원단의 본딩으로만 가능하기 때문에 환경적으로도 유해하다. 이에 본 연구에서는 덕산엔터프라이즈(주)에서 경편조직과 원사의 특성을 고려하여 본딩 공정없이 표면 은 EF-Velboa, 이면은 Polar Fleece와 같은 부드럽고 고급스러운 외관을 동시에 발현하는 3D 입체구조를 가진 원단을 개발하였다. 또한 개발된 원단의 다양한 용도전개를 위해 염색프로그램, 균염성, 견뢰도 테스트를 진행하였으며 향후 제품군으로의 활용 가능성 여부를 검토하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.301-304
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• 2021

4차 산업혁명 시대가 도래함에 따라 사물인터넷(IoT)이 다양한 산업의 영역에서 활용되고 있다. 특히 IoT 기술 및 서비스를 활용하는 분야 중 하나인 스마트 의료 분야는 최근 소프트웨어 및 네트워크의 연결성이 강화되면서 사이버보안 사고가 급증하고 있다. 따라서 스마트 의료 기기·서비스 개발단계부터 보안을 고려하여 안전하게 개발하는 것이 필요하며, 서비스 제공시에도 보안을 고려하여 안전하게 관리 및 서비스를 제공하는 것이 필요하다. 이에 본 연구에서는 IoT 서비스 활용 분야 중 스마트 의료 분야에서 원격의료 서비스의 개인정보 침해 요인을 도출하고 이를 토대로 어택트리 기반의 시나리오 분석을 수행하고자 한다.

• Aerospace Engineering and Technology
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• v.13 no.2
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• pp.29-37
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• 2014

Telemetry, satellite event and error information are used to check the satellite status in ground station. Different from telemetry which only informs the parameter value, event and error gives explicit information of a certain operation or status. Event also contains ground action information because every command execution is logged as event. Currently, those information is gathered and applied only for monitoring of the satellite. However, the load of the operation is getting grown because of the excessively increased information of the satellite with the number of satellite increasement. Also, the process of reporting problem to developer (or an expert) induce time delay for satellites fault management. In this paper, we propose a satellite operation assistant system which collects event sequence and stores in different group by its feature, and then recommends or executes an appropriate action for the identified abnormal state. This system is applicable to on board system for resolving LEO-satellite autonomous fault situation since is has limited contact time.

• Journal of Engineering Education Research
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• v.22 no.2
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• pp.28-35
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• 2019

TRIZ has been widely promoted as an effective methodology to solve engineering problems. Many people wonder if the methodology based on the solutions which resolved technological contradictions more than a half-century ago still works well. To answer the question, the usage of TRIZ 40 inventive principles for the awarded patents of the Korea Invention Patent Exhibition from 2011 to 2017 is analyzed. The result shows that the inventive principles can be applied to a variety of engineering problems in different industries. In addition, there are crucial inventive principles which applied frequently regardless of industry categories.

• Journal of the Korea Society of Computer and Information
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• v.16 no.11
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• pp.67-76
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• 2011

This paper describes the development of interactive visualization techniques and a program that allow us to visualize the structure of the volume data and interactively select and visualize the isosurface components using contour tree. The main characteristic of this technique is to provide an algorithm that draws the contour tree in 2D plane in a way that users easily understand the tree, and to provide an algorithm that can efficiently extract an isosurface component utilizing GPU's parallel architecture. The main characteristic of the program we developed through implementing the algorithms is to provide us with an interactive user interface based on the contour tree for extracting an isosurface component and visualization that integrates with previous isosurface and volume rendering techniques. To show the excelland vof our methods, we applied 3D biomedical volume data to our algorithms. The results show that we could interactively select the isosurface components that represent a polypeptide chain, a ventricle and a femur respectively using the user interface based on our contour tree layout method, and extract the isosurface components with 3x-4x higher speed compared to previous methods.

• Journal of Information Technology Application
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• v.2 no.1
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• pp.113-137
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• 2000

Even though there is no doubt that ERP(Enterprise Resource Planing) system is a prevailing solution for integrating corporate information, many companies still hesitate adopting ERP system because of a great deal of cost including maintenance cost. In special, unless consulting knowledge that is infused into process reengineering phase or adequately embedded in customized ERP system is upgraded on time, then we cannot guarantee the optimality of system performance. Hence, this paper aims to construct an ERP system that adapts itself to environmental changes that are issued by database and users. To do so, we adopt intelligent agent technology and Petri net theory. The agents autonomously cooperate each other to investigate databases and to find any exceptional changes and analyze how the changes will affect ERP performance. The dynamics of the agents are represented as Petri nets. The newly proposed ERP system is to make corresponding BPR processes maintain optimality. To show the feasibility of the proposed ERP maintenance system, logistics component is described as an illustrative example.

• Journal of Practical Engineering Education
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• v.14 no.3
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• pp.459-469
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• 2022

The purpose of this study is to explore the educational effect by developing and applying a decision tree-based artificial intelligence convergence education program. To achieve the purpose of this study, the study was conducted through a three-step process of preparation, development, and improvement. In addition, it consisted of four stages of the creative problem-solving process: 'Understanding the problem', 'Idea search and development', 'realization' and 'evaluation'. In particular, the artificial intelligence convergence education program developed in this study is an unplugged activity that does not include programming. Therefore, it is very noteworthy that artificial intelligence convergence education was implemented in subjects other than technology and home economics education, and information education, which are part of junior engineering education, and practical arts education in elementary education, which is a subject that learns Artificial Intelligence technology including programming during class time. In other words, it shows that AI technology can be integrated and taught in most subjects, not specific subjects and has great significance in that it can utilize the concepts and principles of artificial intelligence technology when teaching the concept of classification, which is included in the curriculum.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.5
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• pp.981-988
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• 2023

As the usage of unmanned aerial vehicles expands, the development and the demand of related technologies are increasing. As the frequency of operation increases and the convenience of operation is emphasized, the importance of related autonomous flight technology is also highlighted. Establishing a path plan to reach the destination in autonomous flight of an unmanned aerial vehicle is important in guidance and control, and a technology for automatically generating path plan is required in order to maximize the effect of unmanned aerial vehicle. In this study, the optimization research of path planning using rapid-exploring random tree method was performed for increasing the effectiveness of autonomous operation. The path planning optimization method considering the characteristics of the unmanned aerial vehicle is proposed. In order to achieve indexes such as optimal distance, shortest time, and passage of mission points, the path planning was optimized in consideration of the mission goals and dynamic characteristics of the unmanned aerial vehicle. The proposed methods confirmed their applicability to the generation of path planning for unmanned aerial vehicles through performance verification for obstacle situations.