• 전기학회논문지
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• 제66권9호
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• pp.1379-1384
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• 2017

To guarantee safety and reliability, RAMS(Reliability Availability Maintainability and Safety) activity for a communication software in train communication network is studied. In this paper, preliminary hazard analysis in RAMS activities is studied for the communication software. Preliminary hazard analysis is done through library for communication software that the specification is defined by IEC 61375. The hazards are defined, then causes and consequence for each hazard are defined. The total 36 preliminary hazards are classified. For high severity hazards are changed to acceptable level by upgrading of system requirement specification.

• 전기학회논문지P
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• 제64권3호
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• pp.97-103
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• 2015

To achieve the safety and reliability, RAMS activity for a railway signal system of Near Surface Transit is studied. In this paper, preliminary hazard analysis in RAMS activities is studied for the railway signal system of Near Surface Transit. Preliminary hazard analysis is done through automatic train protection, automatic train operation and automatic train supervision. The hazards are defined, then causes and consequence for each hazard are defined. The total 75 preliminary hazards are classified. For high severity hazards are changed to acceptable level by upgrading of system requirement specification.

• International journal of advanced smart convergence
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• 제10권2호
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• pp.59-63
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• 2021

In order to broadcast 8K UHD, domestic broadcasting is upgrading production, operation, and transmission technologies in a new way that has various forms such as terrestrial broadcasting, IPTV, mobile, and streaming services. In order to overcome the existing SDI transmission technology that has reached its limit, new transmission technologies using ICT-based convergence such as IT, Network, IOT, and Big Data are developing. Internet Protocol(IP) transmission technology is an IT-based core protocol that transcends various broadcasting infrastructures. Therefore, it can be said that the technology for converting the broadcasting system based on IP is a natural one for preparing for 8K UHD in the future. In this paper, we propose an IP transmission system that adopts a network that can transmit 8K with hardware of 12G Serial Digital Interface (SDI), in order to prepare for the future broadcasting system according to the development of ALL IP interface technology.

• International Journal of Internet, Broadcasting and Communication
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• 제15권2호
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• pp.196-201
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• 2023

In recent years, virtual reality (VR) technology has been widely used in many industrial fields, especially in the fields of medical treatment, games, film and television, to improve the interaction between medical teaching and practical treatment. On the gaming side, the production of virtual reality gaming screens and scenes became increasingly popular, greatly expanding the form of the visual experience. But VR is no longer confined to the health care, education and entertainment industries. During this time, the news media industry has also begun to integrate virtual reality into interviews and user interactions. This study aims to analyze the development of VR technology from the perspectives of immersive VR news experience, real reporting, and prospects, and analyze and think about the interactive participation of media users, the transformation of traditional media, and the upgrading of practitioners' roles.

• 에너지공학
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• 제16권2호
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• pp.83-92
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• 2007

석유자원 고갈에 따른 대체에너지 개발의 필요성과 더불어 온실가스인 $CO_{2}$ 저감 등 높은 환경개선 효과로 인하여 새로운 청정연료로 바이오매스로부터 제조되는 BTL(Biomass to Liquid)-디젤에 대한 관심이 유럽을 중심으로 크게 증가하고 있다. 본 논문에서는 BTL-디젤 기술 개발 현황 및 BTL 공정의 세부 공정기술들을 조사하였다. BTL 공정은 바이오매스 전처리 및 가스화, 합성가스 정제, F-T(Fischer-Tropsch) 합성 및 upgrading 공정 등으로 나눌 수 있으며, BTL 만의 차별적 기술로 합성가스 제조를 위한 가스화 공정과 함성가스 조성 조절을 포함하는 BTL 공정에 최적화된 F-T 합성 촉매 개발이 매우 중요하다. 대표적인 BTL 기술로 독일의 Choren 사는 Carbo-V 가스화 기술을 개발하여 세계 최초로 BTL 공정 상업화를 이루었으며, 네덜란드의 ECN은 tar와 BTX를 제거하기 위한 독자적인 OLGA 기술을 개발하여 가스화 시스템과 연계한 공정을 개발하였다. 또한 미국과 일본 등 많은 나라에서 경쟁적으로 기술개발을 재촉하고 있는 상황이다. 국내의 경우 이에 대한 연구는 전무하나 국내 에너지 안보를 위한 에너지 Mix 정책과 지구온난화 등 환경문제에 대응하기 위하여 BTL 기술 개발은 매우 중요한 의미를 가질 수 있으므로 독창적 기술의 선점이 매우 중요할 것으로 판단된다.

• Journal of Electrical Engineering and Technology
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• 제10권4호
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• pp.1566-1577
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• 2015

A novel high step-up converter is presented herein, which combines the conventional buck-boost converter, the charge pump capacitor and the coupling inductor. By doing so, a quite high voltage conversion ratio due to not only the turns ratio but also the duty cycle, so as to increase design feasibility. It is noted that the denominator of the voltage conversion ratio is the square of one minus duty cycle. Above all, there is no voltage spike across the switch due to the leakage inductance and hence no passive or active snubber is needed, and furthermore, the used switch is driven without isolation and hence the gate driving circuit is relatively simple, thereby upgrading the industrial application capability of this converter. In this paper, the basic operating principles and the associated mathematical deductions are firstly described in detail, and finally some experimental results are provided to demonstrate the effectiveness of the proposed high step-up converter.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2009년도 제7회 압연 심포지엄
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• pp.62-64
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• 2009

Control of back-up roll deformation and wear profile in plate rolling is important not only for enhancement of the structural precision of mill, but also for improving the yield and rolling operation. in the heavy plate mill, there have been strong demands for upgrading back up roll operation technology. In order to satisfy these demands, it is essential to develop the backup roll deformation analysis models and wear profile prediction models. This paper gives a general description of the backup roll deformation and wear model, simulation result for deformation analysis and wear profile.

• The International Journal of Costume Culture
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• 제12권1호
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• pp.93-96
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• 2009

The purpose of the research is to explore the development of Beijing fashion industry in the wave of the world-wide creative industries. Two methods are used in this study: discourse analysis and case study. As a form of modern economy, creative industries are the core of originality and intellectual property. It works to develop and use knowledge resource to produce endless new products and new markets, thereby promoting economic and social development. Beijing local garment enterprises should base on the Government's policies and support, creative talent and high technology to cultivate the local fashion brands with the international competition to achieve the clothing industrial upgrading and the building of Beijing as the world-wide fashion capital.

• 유기물자원화
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• 제27권1호
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• pp.77-85
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• 2019

바이오가스화는 유기성폐기물을 처리하는 과정에서 발생되는 메탄가스를 포함하는 환경 친화적인 연료를 생산하는 기술이다. 바이오가스화는 유기성폐기물의 해양투기 금지 이후 안정적인 육상처리일 뿐만 아니라 신재생에너지원으로 인정받으면서 세계적인 관심을 받고 있다. 최근에는 생산된 바이오가스를 고품질화하여 도시가스 및 수송용으로 이용하는 추세가 증가하고 있다. 바이오가스화 현장시설에서는 아직도 잦은 고장으로 바이오가스 생산이 저하되고, 또한 생산된 바이오가스를 효과적으로 정제하여 이용하는 것이 미흡한 실정이다. 이 연구에서는 바이오가스 생산 및 이용 시설에서의 문제점들을 파악하고, 최적으로 바이오가스를 도시가스 및 수송용으로 활용 가능하기 위한 가이드라인 및 기술지침을 마련하고자 하였다.

• 한국산업융합학회 논문집
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• 제7권4호
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• pp.425-432
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• 2004

This study for Customer Satisfaction(Customer Focus) by Profit security' in the field Process improvement activity and man-power upgrade in the learning of organization activity or upgrading ability of each peoples. This thesis study on the focus of KAPEC which introduce Toyota system can apply to VM, 3jeong, Right Box and Right Position), 5S, JIT(Just In Time), KAlZEN, KANBAN System, CIM, ERP, DAS an output of Factory. For strategic changes to take place in industry 3 key important factors need to be included ; integration of tasks functions and process, decentralization of information and responsibility and finally simplification of products and product structures. These describes how CIM can be implemented using these factors. This study for (1)System Integration, (2) Help Logistic Problems, (3) Partly facilitated growth. (4) Improved production planning (5) Real-time management. (6) Fast reporting (7) Productivity. Quality. Delivery Up, Cost reduction and Autonomy management, FMS in the Plant etc.