• Electronics and Telecommunications Trends
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• v.32 no.4
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• pp.40-47
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• 2017

자율주행 맵은 도로의 주행환경 정보(차로, 도로 마크, 신호등의 위치 등)와 시간에 따라 변화하는 동적 주행환경 정보(장애물 출현, 일시적인 통행제한, 긴급한 도로 복구, 교차로 교통혼잡 등)로 구성된다. 자율주행 맵 생성 및 갱신 기술은 차로 구분선이나, 도로 교통과 관련된 실시간 갱신 주기 측면에서 더욱 세밀하고, 정확한 위치 정보가 요구되며, 또한, 최신성을 유지하는 기능을 가진다. 이러한 고정밀 지도의 세밀함과 정확성, 최신성은 자율주행 서비스를 위해 요구되는 필수적인 요소이다. 클라우드와 연계하여 생성되는 자율주행 맵은 차량 운행 시 수집되는 정보를 클라우드에 축적하여 가공함으로써, 시간과 인력 투입을 통해 데이터를 취득하고 지도를 구축하는 면에서 작업 품을 효과적으로 개선하는 데 도움이 된다. 유지와 보수 측면에서는 정기적으로 또는 신속하게 갱신하여 최신의 정보를 유지하는 장점이 있다. 본고에서는 자율주행 맵을 생성하고 갱신하는 클라우드 연계 플랫폼과 연구 결과 일부를 소개한다.

• Nuclear industry
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• v.38 no.2
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• pp.13-27
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• 2018

재생에너지의 활용 가능성이 제한적이고 인구 밀도가 높은 대한민국의 현실을 놓고 볼 때, 원자력은 온실가스 배출 및 공해를 줄이면서도 충분한 전력을 생산하여 공급해줄 수 있는 가장 신뢰할만한 발전 수단이다. 그러나 한국 정부는 원전과 석탄발전소를 단계적으로 폐쇄하고 이를 대체하기 위해서 다양한 재생에너지를 늘리겠다는 정책을 확고하게 고수하고 있다. 그렇지만 에너지 생산 수단을 전환하겠다는 이 정책의 주요 목표는 액화천연가스(LNG) 발전을 대체 수단으로 삼고 있다. 그 이유는 다른 재생에너지들의 대규모 생산 수단을 개발하는 데는 기술적이고 경제적인 난제들이 걸림돌이 되기 때문이다. 그러므로 미래의 에너지 정책을 결정하기에 앞서, 에너지 전환 정책의 구체적인 사항들을 확실한 근거에 기반해서 검토한 후 계획을 수립하는 것이 매우 중요한 일이다. 이 문제에 관해서 우리는 다음과 같은 점들을 검토하였다 (1) 한국이 처해 있는 기술적 경제적인 제약을 전제로 한 재생에너지원의 개발에 대한 정부의 역할, (2) 가스 발전으로 인해 발생할 수 있는 환경적이며 경제적인 문제점들, (3) 원전정책을 지속함으로써 얻을 수 있는 이점과 원전 유지에 대한 장애물. 위와 같은 세 가지 사항을 검토한 결과, 한국이 지니고 있는 지리적 경제적인 제약과 함께 탄소 배출로 인해 발생하는 비용까지 효과적으로 줄여야 한다는 점 등을 감안할 때 천연가스 발전으로 집중하겠다는 한국의 미래 에너지 정책은 친환경적이지 못함은 물론 경제적이지도 않기 때문에 적정한 비율의 재생에너지를 포함하는 원전 정책을 지속하는 것만이 현실적인 성공 가능성이 가장 높다고 보는 것이 우리의 결론이다.

• Journal of Convergence Society for SMB
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• v.4 no.1
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• pp.17-29
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• 2014

The wireless capsule endoscopy played an important role as the evolutionary medical device to solving the difficulties such as diagnosing the intestine diseases. Due to the limited size and functions, it has some drawbacks. The most obstacle thing is the disability of self-motion, it means that it cannot provide the speed problem. Hence, the characteristics of human digestion system is briefly introduced, especially the intestine, to get the information of endoscopy dynamics. Next, in order to make an abstraction of the condition, a new dynamic friction model called LuGre model is introduced and clearly analysed to get the characteristics and the usage of the model. By the consideration of parameters that are tightly related with the real situation of the capsule endoscopy. The Matlab Simulink was applied to build the model and verified by the simulation to discover the features.

• Development and Reproduction
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• v.2 no.2
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• pp.115-133
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• 1998

Recently public concerns about the endocrine disrupting chemicals (EDC) have resulted in the increased legistrative and regulatory attentions in many countries. Endocrine disrupter is an exogeneous chemical interfering the synthesis, transport binding, action or elimination of natural hormones in the body, which are responsible for the maintenance of homeostasis, reproduction, development and/or behavior. Reported possible harmful effects on human and animal lives, possible developmental anomalities, reproductive malfunctions and behaviors, and the ways of EDC accumulation in animal kingdom are reviewed. The current scientific papers and knowledges on the global contamination of EDCs demonstrates the conclusive data that EDCs have the potentials to cause the calamitous extermination of human and animal species by the global contamination.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2360-2366
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• 2011

The Unmanned Ground Vehicle is comprised of four systems of obstacle detection: The navigation system, vehicle controlling system, obstacle detecting and an integration system that use the various sensors. The research introduced utilizes 6 lasers to recognize obstacles. The system operates an avoidance system within the unmanned ground vehicle, using six lasers. The Unmanned Ground Vehicle's parallel parking and right angle parking is in development using algorithms. This algorithms' certification is intended to be installed in the encoder, in the GPS. By using the Laser Scannerfor the position's calculation, errors are both reduced and minimized, so the tire's slip minimized to the point where the vehicle had a limit of about 5Km/h.

• The Journal of the Korea Contents Association
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• v.20 no.8
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• pp.637-644
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• 2020

VANET (Vehicular Ad Hoc Networks) is a network between vehicles and between vehicles and infrastructure. VANET-specific characteristics such as high mobility, movement limitation, and signal interference by obstacles make it difficult to provide stable VANET services. To solve this problem, this paper proposes a vehicle type-based priority clustering method that improves the existing bus-based clustering. The proposed algorithm constructs a cluster by evaluating the priority, link quality, and connectivity based on the vehicle type, expected communication lifetime, and link degree of neighbor nodes. It tries to simplify the process of selecting a cluster head and increase cluster coverage by utilizing a predetermined priority based on the type of vehicle. The proposed algorithm is expected to become the basis for activating various services by contributing to providing stable services in a connected car environment.

• Proceedings of the Korea Contents Association Conference
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• 2005.05a
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• pp.491-495
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• 2005

Due to the miniaturization and the network supporting functions of home appliances, there is growing need for mobile environment home network system which provides flexibility, mobility and convenience to users. However in home, there are obstacles which make shaded areas and only static and restricted services are available for the existing mobile environment home network system. In this paper, we proposed the mobile environment home network system using Home Robot in order to solve the problem of existing mobile environment home network system.

• Informatization Policy
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• v.23 no.3
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• pp.64-83
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• 2016

Although the government mandated classroom use of smart technology, there exist obstacles to adapting smart technology as a means of educational tools in class. This study aims to explore the preconditions for integrating smart technology and early childhood education. To meet this end, this study investigates preschool teachers' perceptions about the possible benefits or negative impacts of using smart media on child education. Results show that teachers have negative rather than positive perceptions and attitudes toward preschoolers' use of smart media, which implies that rendering teachers have positive impression on smart education is most important for fostering smart education.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.94-96
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• 2021

In this paper, we develop a new navigation algorithm for industrial mobile robots to arrive at the destination in unknown environment. To achieve this, we suggest a navigation algorithm that combines Dynamic Window Approach (DWA) and Dijkstra path planning algorithm. We compare Local Dynamic Window Approach (LDWA), Global Dynamic Window Approach(GDWA), Rapidly-exploring Random Tree (RRT) Algorithm. The navigation algorithm using Dijkstra algorithm combined with LDWA and GDWA makes mobile robots to reach the destination. and obstacles faced during the path planning process of LDWA and GDWA. Then, we compare on time taken to arrive at the destination, obstacle avoidance and computation complexity of each algorithm. To overcome the limitation, we seek ways to use the optimized navigation algorithm for industrial use.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.3
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• pp.71-78
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• 2023

To minimize the occurrence of aviation accidents in the post-COVID, continuous flight training is crucial. However, the current infrastructure of domestic airports and airfields is insufficient to prepare for and respond to accidents, and there is a need for sufficient facility capacity. Therefore, this study examines the construction of a regional airport to minimize aviation accidents and selects factors necessary for determining the site location. Among the 11 selected factors, six were considered the most important site selection factors, including noise issues, weather conditions, obstacle limitations, environmental issues, airspace conditions, and facility usability. Applying these factors, an analysis was conducted on the Songpo area of Sacheon City, Gyeongsangnam-do. Based on a comprehensive review, it can be concluded that the Songpo area is a suitable choice for a regional airport due to its excellent transportation environment, consideration of noise and environmental issues with the residential population, and other factors. Furthermore, the development of the aviation industry is expected to bring about an increase in tourism and economic benefits, and it is anticipated to make a significant contribution to the domestic aviation industry along with the construction of the currently under-construction Ulleung Airport.