• Title/Summary/Keyword: 지자기

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Precise Measurement of Magnetic Field Using CW-NMR Technique (CW-NMR 기법을 이용한 자기장 정밀측정)

  • 이정한;이대행;김민철;이순칠;홍계원;이호준
    • Journal of the Korean Magnetics Society
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    • v.5 no.1
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    • pp.79-85
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    • 1995
  • A precise magnetic field probe was designed to measure the field distribution inside a superconducting magnet. The operation principle of the developed equipment is based on cw-NMR. The range of field is from 2.8 T to 5.8 T, and the resolution is better than 0.3 ppm NMR samples were water and heavy water contained in a tube of 4 mm diameter and 4mm height. This equipment can be manufactured very inexpensively compared with the currently available commertial ones.

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Magnetic Field Strength Measurement using Circular Loop Antenna (환상 루-프 안테나를 이용한 자기장 세기의 측정)

  • 박병권;강찬구;김정환
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.16 no.6
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    • pp.566-573
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    • 1991
  • For the evaluation of the magnetic field strengthmeasured by standard field method with that measured by standard antenna method. The compared results are in good agreement within the error limit. As the Result of this research, the calibration service for magnetic field strenth measurement can be provided whtin the uncertainty of about 1 dB in the frequency range of 10 kHz to 30MHz.

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Self-Regulated Learning of Adolescents: Its Current Status and Educational Implications (청소년의 자기조절학습: 현황과 교육적 함의)

  • Seung Ho Park ;Eun Hee Seo
    • Korean Journal of Culture and Social Issue
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    • v.14 no.1_spc
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    • pp.135-152
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    • 2008
  • The purpose of this study is to research psychological and social devices to foster self-regulated learning of Korean adolescents. This study investigated metacognitive, motivational, and behavioral factors of self-regulated learning through current research. In terms of metacognitive factors, we reviewed the importance of cognitive and metacognitive learning strategies of adolescents for better self-regulated learning. Especially we gave a great emphasis on the role of comprehension monitoring metacognitive strategy for the learning to read in this review. For motivational factors, recent research of self-regulated learning has tended to focus on self-efficacy and goal orientation. The current research examining behavioral factors of self-regulated learning has tended to focus on time management and academic procrastination. Research findings in the motivational aspect suggest that we need to develop the program to improve adolescents' self-efficacy and recognize new re-conceptualization of the goal theory. Research findings in the behavioral aspect recommend practical tips and strategies to improve time management skills and to overcome academic procrastination. Finally, future directions for research are discussed.

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Development of Magnetic Levitation Stage with Wide Area Movement (대면적 이송 자기부상 스태이지 개발)

  • Jeon, Jeong-Woo;Caraiani, Mitica;Kang, Dong-Sik;Kang, Hyun-Seok;Kim, Sung-Shin
    • Proceedings of the KIEE Conference
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    • 2006.10c
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    • pp.458-460
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    • 2006
  • 본 논문은 대면적 자기부상 스태이지의 정밀급 위치제어를 위한 시스템 구성 및 제어 알고리즘에 대한 연구결과를 기술한다. 자기부상 스태이지는 16개의 동기모터에 의해 구동되며, 각 모터의 Moving 부분에 수직방향의 힘과 수평방향의 힘을 모두 발생할 수 있도록 Halbach 구조로 되어 있다. Matlab/Simulink 모델링을 수행하였으며, Simulation 결과를 벼였다.

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미래지향적 교통수단으로서의 자기부상렬차

  • 한규환;김재홍
    • Journal of the KSME
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    • v.32 no.9
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    • pp.758-764
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    • 1992
  • 자기부상열차는 환경영향성, 안락성, 경제성, 고속성 등을 포함한 여러 가지 측면에서 미래 지 향적인 교통수단으로 각광을 받을 것으로 기대된다. 외국에서는 약 20년에 걸친 개발을 통하여 약 500KPH 기량의 시험속도를 달성하고 실용화를 위해 주행시험을 계속하고 있다. 국내의 개 발현황으로는 아직 저속(50KPH 이하)에 머물고 있으나 계속적인 연구개발을 추진하여 새로운 교통수단의 실용화를 앞당기고자 하는 노력이 관련 국가연구소 및 기업을 중심으로 이루어지고 있다. 이와 더불어, '93년 대전세계 박람회에서 운행될 자기부상열차의 성공여부가 금후의 자기 부상열차 실용화에 중요한 전기가 될 것으로 사료된다.

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The Experience of Exile of Yu, Eui-yang, and the Methods of its Presentation (유의양(柳義養)의 유배체험과 그 제시 방식)

  • Lee, Seung-bok
    • Journal of Korean Classical Literature and Education
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    • no.37
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    • pp.75-109
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    • 2018
  • This paper explains how the exile experience and the writer's consciousness were presented in Namhaemungyeonrok and Bukgwannojeongrok, both written by Yu, Eui-yang in the 18th century. He was banished to Namhae island and Jongseong because of the King Yeongjo's anger. The author composed his writings by presenting historic events and tales related to the places he was passing, and by presenting poems as well. It means that the author tried to understand these places through history and literary works. Moreover he presented in detail, the lives of people living in the places of his exile. It shows how he tried to understand and recognize their lives as they themselves did. In addition, focusing on the relationships and conversations with the people from each place, the author described his life in exile. There are some reasons he presented his exile experience in the ways mentioned above. First, he was a government official and a writer. Second, as the reason for his banishment was not very significant, he felt relaxed more or less. Last, by focusing on his journey and the place of his exile, he was able to forget the agony he was facing to some degree.