• The Journal of Korean Institute of Communications and Information Sciences
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• 제38C권4호
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• pp.371-377
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• 2013

Fishing boats more than 5 tons is obliged to VHF DSC by Fishing Vessels Act and Vessel Safety Act. The owner of the fishing vessel is equipped to the automatic position reporting device in accordance with the Notice of the Minister of Land, Transport and Maritime Affairs to regulations, shall be ensure to navigations safety and in order to respond quickly in the event of maritime accidents on fishing vessels. East sea set up to start in 2012, which is now underway the annual install plain to the yellow sea and the south sea for VHF coast stations. It is web-based remote operation of DSC on the remote control and monitoring in Fishery Information Communication Station for the coastal VMS construction project. All fishing vessels is VHF DSC in conjunction with the GPS that location information transmitted to the coast station. automatically by the DSC call. This paper has been studied on the communications coverage set up and traffic operation for realization a roaming service by navigation route tracking and RSSI techniques in parallel algorithm refer to VHF DSC coast stations in east sea.

• Transactions of the Korean Society of Mechanical Engineers A
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• 제40권2호
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• pp.213-220
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• 2016

This research aims to develop core technologies for passive carrier (no power in carrier itself) transfer system. The technologies are passive levitation, propulsion, and guidance, which can be great benefits for semiconductor and display manufacturing industries. Passive maglev carrier is necessary to precise position control for quiet and stable transfer operation. However, the structural characteristics of carrier and the installation errors of gap sensors cause the pitch motion. Hence, the controller design in consideration of pitch motion is required. This study deals with the reduction control of carrier pitch motion. PDA controller and PDA controller with pitch control are proposed to compare the pitch angle analysis. The pitch angle and the levitation precision are measured by experiment. Finally, the optimized design of pitch controller is presented and the effects are discussed.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• 제4권2호
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• pp.197-207
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• 2006

The engineering performance of a high level waste repository is significantly dependent upon the T-H-M behavior in the engineered barrier system. An engineering-scale test facility (KENTEX) was set up to validate the T-H-M behaviors in the buffer of a reference disposal system developed in the 2002. The validation tests started on May 31, 2005 and is now in progress. The KENTEX facility and validation test programme are introduced, and pre-operation calculations are also presented to give information on the sensitive location of sensors and operational conditions. This test will provide information (e.g., large-scale apparatus, sensors, monitoring system etc.) needed for 'in-situ' tests, make the validation of a T-H-M model for the T-H-M performance assessment of the reference disposal system, and demonstrate the engineering feasibility of fabricating and emplacing the buffer of a repository.

• Journal of Astronomy and Space Sciences
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• 제22권1호
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• pp.59-68
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• 2005

KARI studied data interface of Space Applications for developing Space Experimental Instrument in International Space Station, designed, and manufactured the UDIS (International Space Station Universal Data Interface simulator) according to requirements of the data interface. This paper explains the design and implementation of UDIS for space application. UDIS is the instrument which simulate to interface the data from ISS to experiment module, payload and habitation module and use the development of a experiment system in the space. This simulator will be used to the GSE (Ground Support Equipment) for test of experiment system. By realization of the simulator, we ensure data interface skills for a manned-space data communication system.

• Journal of Korean Library and Information Science Society
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• 제32권4호
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• pp.331-360
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• 2001

School Libraries are facilities which support teachers and students in their teaching and learning activities and help to fulfil the school curriculum. Recently the Ministry of Education & Human Resources and Development is emphasizing ‘self learning’and it means that the problem solving ability of students can be improved through resource based learning & self learning. The resource based learning is closely connected with school libraries. School libraries are basic organization among all kind of libraries in all parts of th country and they can not develop without the systematic support of the government. The school libraries are just nominal because education in schools is centered on entrance examination and the government is indifferent to them. Therefore, it is urgent to constitute the related regulations and systems to rescue school libraries. The present school libraries laws should be revised toward the direction of effectiveness and it is possible to revise them after School Library Promotion Acts are constituted in public. All kinds of system and organization can develop only when they attach great importance to people Even though we constitute good laws and have good systems, they can not develop without the support of administrative organizations. They can develop when the administrative organizations have the strong will to develop them and are affectionately interested with them. The development of school libraries are under the control of strong interest and will of the people who are in charge of the systems and apply the related regulations.

• Journal of Advanced Navigation Technology
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• 제19권5호
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• pp.379-388
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• 2015

In the end of 1990's, future free flight technology had been developed and tested in America and government established the plan for free flight until 2017. Aircraft separation assurance must be secured essentially to avoid collision between aircrafts before Free Flight comes true. Now, Civil aircraft has rules about avoidance activity with traffic collision avoidance system (TCAS) but it can't apply to light aircraft. So there is a need about alternative method to apply light-aircraft because it has space and price problem to use TCAS. In this paper, TCAS algorithm has been modified and verified by simulating with LABVIEW program under ADS-B condition to get miniaturization and weight lighting cheaply. By simulating, collision alert algorithm is analyzed and verified with collision situation proposed by ICAO, and 100% checked for performing the alert announciation on all cases by TCAS standards.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• 제42권1호
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• pp.37-46
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• 2014

This paper describes the conceptual design and development test procedure of a unmanned scaled-down personal air vehicle(PAV) with drive and flight dual mode capability. Trade studies on operational requirements led to the suggestion of a quad tilt prop platform which has nacelle tilt capability with multi rotor configuration. Motors for propeller propulsion and driving mechanism were integrated into a single nacelle, then they were implemented by nacelle tilt mechanism for conversion between the drive and the flight modes. Primary design parameters and initial specifications were confirmed through conceptual design, then functional tests were performed with the test platforms for the drive and the flight modes.

• KDI Journal of Economic Policy
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• 제13권3호
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• pp.113-133
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• 1991

본고(本稿)는 국민생활수준(國民生活水準)에 영향을 주는 주요 거시(巨視) 및 미시지표(微視指標)의 국제비교를 통하여 우리나라가 추구해 온 개발전략(開發戰略)을 재조명(再照明)하고 우리의 현재좌표(現在座標)를 검토코자 집필되었다. 자료(資料)의 제한(制限), 국제비교(國際比較)에서 흔히 제기되는 평가(評價)의 문제 등에도 불구하고 국제비교분석(國際比較分析)은 유용한 수단(手段)이었으며 다음과 같은 정책적(政策的) 함의(含意)를 얻을 수 있었다. 지금까지 한국(韓國)이 추구한 개발정책(開發政策)의 역점(力點)은 대체적으로 경제성장(經濟成長)에 두어져 왔었다고 분석되고 있다. 이는 높은 경제성장률(經濟成長率)이나 1인당(人當) 소득(所得)의 지속적인 증가를 통하여 소비수준(消費水準)의 제고와 소비구조(消費構造)의 개선 등 국민생활수준(國民生活水準)의 향상으로 연결되고 있다. 더불어 소득분배(消費分配)를 위시하여 보건(保健), 영양지표(營養指標) 등 사회지표(社會指標) 측면에서도 개선되는 추이를 보이고 있는 것으로 평가된다. 이와 같은 개발정책(開發政策)의 성공적(成功的) 결실(結實)은 국민복지증진(國民福祉增進)에 크게 이바지한 것임에 틀림없으나 사회복지향상(社會福祉向上)을 위한 적극적인 노력은 미흡하였다. 지속적인 고도성장(高度成長)의 결과 국민생활향상(國民生活向上)을 위한 기본요건(基本要件)인 1인당(人當) 소득(所得)이 크게 증가되어 빈곤인구(貧困人口)가 꾸준히 줄어들고 있으나 생활(生活)을 둘러싸고 있는 경제(經濟) 사회적(社會的) 환경은 상대적으로 열악(劣惡)해지게 되었다. 앞으로도 산업화(産業化)와 도시화(都市化)가 계속될 전망임에 비추어 국민생활(國民生活)과 직접적으로 관련되는 생활여건(生活與件)의 개선(改善)에 대한 각별한 정책적(政策的) 배려(配慮)가 요청된다고 판단된다. 따라서 경제(經濟)의 안정적인 운영과 함께 국민생활수준(國民生活水準)의 내실(內實) 있는 향상을 기해 나가자면 고도성장(高度成長)이 준 부작용(副作用)을 극소화해 나가야 할 것이다. 삶의 질(質)에 대한 수용할 만한 국민적(國民的) 욕구(慾求)를 과감히 받아들여 사회개발(社會開發)에 돌려지는 공적지출(公的支出)을 꾸준히 늘려나가되 일본(日本)의 경험이 시사하는 것처럼 비용효과적(費用效果的)인 지출이 되도록 제도적 장치가 강구될 필요가 있을 것이다. 국민생활수준(國民生活水準)의 개선은 장기적(長期的)인 시각(視角)에서 비전과 일관성을 지니고 추진되어야 할 성질을 지니고 있기 때문이다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• 제20권2호
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• pp.277-282
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• 2020

The construction of medium-and large-sized microgrid systems by unit area, which is being promoted worldwide, is being developed and expanded in the form of efficient operation of electric grids and independent operation in preparation for power emergencies. Therefore, for the development of the domestic electricity industry, it is urgent to analyze the current status and technology of relevant international standardization, and to make international standardization of domestic standard (draft) on the matters that need to be enacted and newly established. Campus microgrid implements smart grid element technologies such as Integrated Energy Management System(EMS), Distributed Power(DG), Energy Storage System(ESS), Demand Response(DR), and Electric Vehicle(EV) in a university campus. As a system that reduces energy use and improves energy use efficiency and energy independence, standardization is established to secure interoperability and reliability of such systems.

• Proceedings of the KSR Conference
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.739-744
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• 2010

As recent traffic policy focuses on reduction of congestion and environmental contamination, with a catch phrase, 'Green Traffic', Low Carbon Green Growth' and 'Sustainable Development', introducing the new eco-friendly transport means including railway has been emerging as critical issue. Included in the new transport means are BRT, Bimodal Tram and LRT, and this study was intended to evaluate and analyze Bimodal, among others, which generates less emission, noise and vibration thanks to hybrid type traction system employed by Bimodal Tram, which is considered a future-oriented system because of eco-friendly features and cost efficiency as well as punctuality and convenient accessibility to bus. Thus in this study, appropriateness of Bimodal Tram comparing to other system(BRT) was suggested, using conversion traffic from the road, traffic speed and CO2 emission at the metropolitan area and large provincial areas as the barometer in evaluation, and furthermore, the measures applicable to introduction strategy that will meet various functional aspects in urban area in the coming days were developed.