• Title/Summary/Keyword: 고등연구소

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3-channel Tiled-aperture Coherent-beam-combining System Based on Target-in-the-loop Monitoring and SPGD Algorithm (목표물 신호 모니터링 및 SPGD 알고리즘 기반 3 채널 타일형 결맞음 빔결합 시스템 연구)

  • Kim, Youngchan;Yun, Youngsun;Kim, Hansol;Chang, Hanbyul;Park, Jaedeok;Choe, Yunjin;Na, Jeongkyun;Yi, Joohan;Kang, Hyungu;Yeo, Minsu;Choi, Kyuhong;Noh, Young-Chul;Jeong, Yoonchan;Lee, Hyuk-Jae;Yu, Bong-Ahn;Yeom, Dong-Il;Jun, Changsu
    • Korean Journal of Optics and Photonics
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    • v.32 no.1
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    • pp.1-8
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    • 2021
  • We have studied a tiled-aperture coherent-beam-combining system based on constructive interference, as a way to overcome the power limitation of a single laser. A 1-watt-level, 3-channel coherent fiber laser and a 3-channel fiber array of triangular tiling with tip-tilt function were developed. A monitoring system, phase controller, and 3-channel phase modulator formed a closed-loop control system, and the SPGD algorithm was applied. Eventually, phase-locking with a rate of 5-67 kHz and peak-intensity efficiency comparable to the ideal case of 53.3% was successfully realized. We were able to develop the essential elements for a tiled-aperture coherent-beam-combining system that had the potential for highest output power without any beam-combining components, and a multichannel coherent-beam-combining system with higher output power and high speed is anticipated in the future.

제23회 대학교육 정책포럼-대학경쟁력 강화와 대학의 인적 자원 개발

  • Seo, Jeong-Hwa
    • 대학교육
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    • s.150
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    • pp.108-117
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    • 2007
  • 한국대학교육협의회는 11월 8일(목) 홍익대학교에서 대교협, 전국대학기획실(처)장협의회,한국고등교육정책학회의 공동주최로 제23회 대학교육 정책포럼을 개최하였다. 이 포럼은 차기정부의 고등교육경쟁력 제고방안이라는 주제로 서정화 홍익대 교수의 기조발표, 강병운 대교협 고등교육연구소장의 주제발표 및 신승호 강원대 기획처장, 김민구 아주대 기획처장, 신정철 서울대 교수, 서수용 한국대학신문 뉴스본부장, 정일환 대구가톨릭대 교수의 토론으로 진행되었으며 "대학교육"에서는 이 중 기조발표 내용을 게재한다.

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Voltammetric measurements of iron using an infrared photodiode electrode (적외선 광 다이오드를 사용한 철의 전압전류 정량)

  • Ly, Suw Young;June, Young Sam;Lee, Hyun Ku;Kwak, Kyu Ju;Kim, Kun Woo;Kim, Jong Hyoung;Jeong, Ho Young;Kim, Bong Kyun;Chun, Seok Joo;Chang, Jin Won
    • Analytical Science and Technology
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    • v.20 no.4
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    • pp.289-295
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    • 2007
  • A simple electric circuit of an infrared photodiode electrode (IPDE) was utilized to monitor iron using square-wave (SW) anodic stripping voltammetry (SV) and cyclic voltammetry (CV). The optimum analytical conditions were determined and were compared with those of common working electrodes. The comparison showed that CV is more sensitive and convenient to use than the common voltammetry methods. At the optimized conditions, the working ranges of 0.1- to 0.8- and 0.85- to 6.0 mg/L iron was obtained. Relative standard deviation of 15 measurements of iron (0.4 mg/L) was 0.09%. The analytical detection limit was found to be $80{\pm}0.6ug/L$, which was applied to iron in waste water.

Photonics News

  • Korea Association for Photonics Industry Development
    • Photonics industry news
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    • s.29
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    • pp.64-71
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    • 2005
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Photonics News

  • Korea Association for Photonics Industry Development
    • Photonics industry news
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    • s.34
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    • pp.62-67
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    • 2006
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A Study on the effects of one's blood type on brain function and corelation character of middle.high school (중.고등학생의 혈액형과 뇌 기능 및 좌우뇌 선호도와의 관계연구)

  • Bak, Ki-Ja
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.11
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    • pp.4260-4265
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    • 2010
  • This study was purposed on revealing the connections between blood types and brain functions or correlation character among Junior and Highschool students. Observed records are from those kids who volunteered for KRIJUS(Korea Research Institute of Jungshin Science)'s brain wave measurement from September 2005 to December 2008. The whole 2208 Junior and Highschool studentskids group consists of junior 628 female, 1002 male and high 213 female, 365 male. Blood types are as follows A>B>O>AB dominately ordered. Second, blood type had no relations with corelation character. Third, blood type had no relations with brain function rate. Thus, it would not be such a wise decision to tell one's character depending on his/her blood type.

뉴스&토픽 - 국내

  • Korean Federation of Science and Technology Societies
    • The Science & Technology
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    • no.6 s.409
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    • pp.6-7
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    • 2003
  • 기업부설연구소 박사급 연구인력 5%/ 고등기술연구원, 로봇센터 설립/ 한국과학자, 세포내 물질이동 비밀규명/ 광주과기원 세계최초 기술개발 선뵈/ 원자로 이용한 실리콘반도체 개발/

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과학에세이-러시아의 과학계

  • O, Jin-Gon
    • The Science & Technology
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    • v.28 no.11 s.318
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    • pp.68-69
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    • 1995
  • 러시아의 경제상태는 극도로 악화되어 과학자의 보수는 월 1백달러 정도 생산이 위축되고 물가가 급등하는 어려움 속에서도 러시아 과학계의 연구활동은 중단되지 않고 꾸준히 계속되고 있으며 나아가 연구소나 고등교육의 재편성이 한창 진행중이다.

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