Lightning 관측시스템의 현황과 한반도내의 Lightning 발생 현황

우정욱(禹貞旭) 한국조명·전기설비학회 2010 조명.전기설비 Vol.24 No.2

미국 철도화물운송시장의 구조변화 분석

우정욱(Jung-Wouk Woo),안준용(Joon-Yong An),박영태(Young-Tae Park) 한국국제상학회 2010 國際商學 Vol.25 No.4

After the establishment of the ‘Staggers Rail Act of 1980’, which established an atmosphere of free competition in the rail freight transportation market, freight railway in America became larger and the proportion of freight railway in the market increased. In 2008, it took up 43% of the transportation market based on ton/mile unit and the productivity of freight rail increased. On the other hand, in the case of Korea, the competing atmosphere is being set up under the influences of the renovation of the rail transportation industry in 2004. However, to make the rail transportation market more active and become more advanced, a lot of effort is required to build a stronger foundation for a free competition atmosphere. In this paper, we have deducted the political implications on the establishment of strengthened competition in Korean rail transportation industry from reviewing what kind of changes the rail transportation market in America went through and how it was developed. In this case, we have focused on the changes in industrial trends towards the restriction policy. Also influences of the deregulation policy after 1980 on the enhanced market efficiency were reviewed.

345kV 송전선로 아킹혼 최적 설치 간격에 관한 분석

우정욱(Jung-Wook Woo),신구용(Koo-yong Shin),곽주식(Joo-sik Kwak),오준암(Joon-arm OH) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.7

한,일 화물자동차운송업의 현황과 과제 비교 연구

우정욱 ( Jung Wouk Woo ),김진방 ( Jin Bang Kim ) 한국유통정보학회 2005 유통정보학회지 Vol.8 No.1

H.264/AVC를 위한 효율적인 CAVLC(Context-based Adaptive Variable Length Code)하드웨어 구조 설계

우정욱(Junguk Woo),이원재(Wonjae Lee),김재석(Jaeseok Kim) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11

In this paper, we present a efficient CAVLC (Context-based Adaptive Variable Length Coding) hardware architecture. In the proposed design, we propose a detecting technique, which detects the first and last position of non-zero coefficient in zigzag scanned coefficients. By using this technique, the processing time for coefficient detecting and run_before encoding can be reduced. In addition to that, zigzag scanned coefficients are rearranged by removing zero coefficients to encode levels efficiently. By adopting these two methods, the required processing time was enhanced about 23% compared with the previous architecture. It was designed in a hardware description language and the total logic gate count is 16.3k using 0.18㎛ CMOS standard cell library. Simulation results show that our design is capable of real-time processing for HD1080 30fps videos at 81㎒.

한반도내 낙뢰의 3차원 특성에 관한 연구

우정욱(J.W. Woo),곽주식(J.S. Kwak),강연욱(Y.W. Kang),권동진(D.J. Kwon),문재덕(J.D. Moon) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

Since 1996, KEPCO has been operating a wide range lightning detection system, LPATS, and been accumulating relative application technics and statistical analysis skills. So, KEPRI already has its own basis to develope more accurate advanced detection technology and references to do comparative study. For Three-dimensional imaging of lightning channels, UHF/VHF antenna systems were installed at 2 sites. The distance between two sites is about 30 ㎞. In this paper, we would like to introduce about our system and its results.

초등학교 체육교사의 리더십유형과 수업인지도 및 수업만족도에 관한 연구

우정욱(Jung Wook Woo),문선호(Sun Ho Mun) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.43

The purpose of this study is to analyze the relationships among elementary school physical education teacher`s leadership behavior, lesson awareness and satisfaction. A group of elementary school students who study in Busan participated in the survey and 396 vaild questionnaires were collected. To conclusions were verified using SPSS 12.0 through the multiple regression analysis and were drawn as follows. First, servant leadership and charisma leadership appeared to have a significant effect on lesson awareness. Second, servant leadership and charisma leadership appeared to have a significant effect on lesson satisfaction. Third, lesson awareness appeared to have a significant effect on lesson satisfaction.

철도 인터모달 운송의 효율적 운영을 위한 정보기술 적용 방안

우정욱(Jung Wouk Woo) 한국국제상학회 2017 國際商學 Vol.32 No.1

인터모달리티(intermodality)는 문전운송(door-to-door transport service)에서 적어도 이종(異種)의 운송수단이 통합된 방식으로 사용될 수 있도록 하는 운송의 특성을 가리킨다. 인터모달리티의 추진은 운송 및 물류 시스템의 효율성 제고뿐만 아니라 운송으로 인한 외부비용의 감소에도 유효하게 작용함으로써 그 중요성이 국제적으로 인정받고 있다. 최근 국내에서도 환경부하를 줄이고 지속가능한 운송체계 구축을 위해 인터모달 운송시스템 구축을 위한 정책을 추진하고 있으나 여전히 개선의 조짐을 보이지 않고 있다. 특히 육상운송에서 도로운송의 대체수단으로서 그 역할을 수행해야 할 철도는 각종 제약으로 인해 화주가 원하는 서비스를 제공하지 못하고 있어 대책마련이 시급한 실정이다. 본 연구에서는 지속 가능하면서 효율적인 물류를 실현하기 위해 인터모달 운송시스템 정비에 노력해 오고 있으며 특히 정보통신기술 등의 활용을 통해 철도 인터모달 통합운영체계 구축에 선제적으로 대응해 오고 있는 미국의 사례를 살펴봄으로써 국내 철도 인터모달 운송 시스템의 정비와 추진을 위한 제반과제에 대하여 검토해 보았다. Purpose : In this study, we have been trying to improve the intermodal logistics system to realize sustainable and efficient logistics. Especially, we will look into the cases of U.S. which has been preemptively responding to the construction of a railway intermodal integrated operating system through the use of information communication technologies and examine the various tasks for the maintenance and promotion of the domestic railway intermodal transportation system. Research design, data, methodology : The paper used a qualitative research methodology through the literature review. Results : In the U.S., information technology such as cargo identification, information systems for vehicle position tracking and monitoring, sensors and ITS have been important projects to improve the efficiency of intermodal transportation. Test and demonstration project have been carried out to identify the ITS techniques applicable to intermodal cargoes. As a result, the ITS architecture and its criteria have been set up for cargo identification technology that considers interoperability and security control. In Korea, it is necessary to construct a railway intermodal transportation system in terms of environment and logistics efficiency. For this, it is necessary to construct a real-time response system using system architecture setting for railway intermodal users, development of intermodal information system, interface development with other traffic information system, ICT. Conclusions : In Korea, measures are urgently needed that can provide transportation system and logistics service to meet the demand of shippers and to guarantee for social and economic growth. For this purpose, it is necessary to secure the accessibility, mobility and service improvement of the railway by securing the connection with other transportation and traffic information system. It is also necessary to develop railway intermodal transportation facilities over a long period of time, and to access them through a nodal point of view, but this requires time and costly constraints. This disadvantage can be solved by securing the flow of railway cargo without interruption by utilizing information technology such as ITS and ICT. It also has the advantage of contributing to the improvement of the environment by increasing the use efficiency of railway freight stations, vehicles, and transportation infrastructure. This study of intermodal transport in the United States is important that provides opportunities to assess current information and communication technologies and to identify issues to be studied in the future, as well as to anticipate changes and trends in the operation of domestic intermodal transportation systems.

한전의 새로운 낙뢰측정 네트워크 KLDNet

우정욱(J.W. Woo),곽주식(J.S. Kwak),심응보(E.B. Shim),원봉주(B.J. Won),문재덕(J.D. Moon) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

Lightning induced faults accounts for more than 66% at the transmission lines of KEPCO. The lightning causes damages to power system equipments including transmission line, the shut down of electricity and the electro-magnetic interference. Because of this reason. we need the real time lightning information for the optimal operation of power system. And, it is required to obtain and accumulate the lightning current parameters for the insulation design. A lightning detection system, LPATS, has been operated since 1995 in KEPCO. For the improved detection efficiency, we had in stalled the new lightning detection network named as KLDNet in 2005. Also, we had developed the new software for the lightning parameters analysis and real time information service on the WEB. In this paper. we would like to introduce about the new system.

미국 철도화물운송시장의 구조변화와 시사점

우정욱(Woo Jung-Wouk),안준용(An Joon-Yong) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7

After the establishment of 'Staggers' Rail Legislation' in 1980, which established an atmosphere of free competition in rail freight transportation market, freight railway in America became larger and the proportion of freight railway in the market increased. In 2008, it took up 43% of the transportation market based on tonne/mile unit and the productivity of freight rail increased. On the other hand, in the case of Korea, the competing atmosphere is being set up under the influences of the renovation of the rail transportation industry in 2004. However, to make the rail transportation market more active and become more advanced, a lot of efforts are required to build a stronger foundation of free competition atmosphere. In this paper, we have deducted the political implications on the establishment of strengthened competition in Korean rail transportation industry from reviewing what kind of changes the rail transportation market in America went through and how it was developed. In this case, we have focused on the changes in industrial trend towards the restriction policy. Also influences of the deregulation policy after 1980 on the enhanced market efficiency were reviews.