• Title/Summary/Keyword: Chongju

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Performance Analysis of Decoder for hybride Optical CDMA and WDM (광 CDMA와 WDM의 Hybrid를 위한 Decoder의 성능분석)

  • Shin, Heui-Young;Sim, Hyuong-Kwan;Yoo, Chong-Hyun
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1847-1849
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    • 2001
  • 본 논문에서는, 광통신에서 정보전송량을 극대화하기 위한 방법으로 WDM의 전송링크에 광 CDMA의 부호기와 복호기를 병합하여 WDM과 광 CDMA를 하이브리드 함으로써 전송용량을 극대화하는 방법을 제안하였다. 하이브리드 방법에는 초단펄스를 이용한 방법과 광지연 선로를 사용하는 방법이 있으나, 본 논문에서는 초단 펄스를 이용한 방법을 사용하여 적용하였다.

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Performance analysis of opto-electronic system using Split-step angular spectrum method (Split-step angular spectrum 방법을 이용한 광전자 시스템 성능분석)

  • Shin, Heui-Young;Sim, Hyuong-Kwan;Yoo, Chong-Hyun
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1850-1851
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    • 2001
  • 광전자실험에 사용되고있는 수동 광학소자로는 lense, mirror, grating, prism, polarizer 등 이 있다. 본 연구에서는 각 소자들에 대한 수학적 모델과 실질적 구조에 의한 수치 해석적 모델인 Split-step을 angular spectrum 방법을 구현하고 이를 이용한 실험적 결과를 이론치와 비교 분석하여 모델의 정확성을 분석하였다.

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Two dimensional Phase Transition of Liquid Crystal Film (액정박막에서의 2차원 상전이)

  • Jung, C.S.;Xue, J.Z.;Kim, M.W.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1993.05a
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    • pp.119-121
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    • 1993
  • Two dimensional phase transition and three dimensional propagation of layer structures of liquid crystal film are investigated by using surface second harmonic generation method. We have found a distinctive first order phase transition between a monolayer phase and a stable 3-layer phase of 8CB liquid crystal film.

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Automatic Cognition System Design using Microprocessor

  • Kim, Si-hwan;Lin, Chi-ho;Young Huh;Kim, Ho-seok
    • Proceedings of the IEEK Conference
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    • 2002.07b
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    • pp.1212-1215
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    • 2002
  • This paper proposes the system that automatically cognizes the external interface cards on control board. This system is proposed by this paper endows with ID to external interface card and cognizes a connection of external interface card. Also this system automatically executes a task for external interface card. This system has an extension of function according to cognize an external interface card and is fast the execution.

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Active-RC Circuit Synthesis for the Simulation of Current-Controllable Inductors and FDNRs

  • Park, Ji-Mann;Chung, Won-Sup;Kim, Hee-Jun
    • Proceedings of the IEEK Conference
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    • 2002.07b
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    • pp.774-777
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    • 2002
  • A systematic synthesis process is described for the simulation of current-controllable inductors using operational transconductance amplifiers (OTAs). The process is used to obtain three circuits; two are believed to be novel. The process is also applied to design current-controllable frequency-dependent negative resistances (FDNRs). Operation principles of designed circuits are presented and experimental results are used to verify theoretical predictions. The results show close agreement between predicted behavior and experimental performance.

The Study on the Experience program development of educational festival (교육형 축제의 체험프로그램 발전방안 연구)

  • Lee, Ka-eun;Kim, Hae-seong;Lee, Yk-su
    • Proceedings of the Korea Contents Association Conference
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    • 2010.05a
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    • pp.281-285
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    • 2010
  • 본 연구는 국내 교육형 축제의 체험프로그램의 형식, 진행방식, 내용의 교육적 측면을 알아보고, 향후 방향정립의 기초를 제공하고자 하였다. 연구결과 국내 교육형 축제의 체험프로그램은 형식 및 진행방식이 유사한 것으로 나타났다. 이를 개선하기 위해 탈일상성 강화, 만족도 조사를 통한 프로그램 개선, 차별적 형식의 프로그램 개발 등을 제시하였다.

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LBB Service Using Dedicated Shot Range Communication (단거리 전용 무선 통신망을 이용한 LBB 서비스)

  • Kim, si-jung;Lee, bong-keun;Kim, bong-han
    • Proceedings of the Korea Contents Association Conference
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    • 2010.05a
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    • pp.28-30
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    • 2010
  • 본 논문은 단거리 전용 무선을 이용하여 도로를 주행하는 운전자들에게 실시간 POI(Point of Interest) 정보를 효과적으로 수집 가공 분배 제공할 수 있는 LBB(Location Based Boardcasting) 개발 하였다. 또한 LBB 기술 요소 장치를 개발하여 보급함으로써 운전자 지점부근의 상세하고 다양한 정보를 제공하는 텔레매틱스 및 지능형 정보 제공 시스템의 핵심 기술을 연구 개발 하였다.

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Prospective Elementary Teachers` Lesson Plans and Teaching

  • Lee, Kyeong-Hwa
    • Research in Mathematical Education
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    • v.5 no.2
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    • pp.119-126
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    • 2001
  • In this paper we deal with two questions: 1) How have prospective teachers reflected mathematics curriculum reform in their planning of mathematics lessons\ulcorner 2) To what extent were the pre-service teachers able to be reflective about their planning of mathematics lessons\ulcorner Form analyses of videotapes, field notes, discussions among the college students, we found four features in the prospective teacher\\`s lesson plans and their teaching.

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Bayesian Burn-in Procedures for LFPs with the Mixed Binomial Prior Distribution for the Number of Defectives

  • Kwon, Young-Il
    • Proceedings of the Korean Reliability Society Conference
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    • 2000.11a
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    • pp.373-373
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    • 2000
  • Bum-in procedures are developed far limited failure populations in which defective products fail soon after they are put in operation and non-defective ones never fail during the technological life of the products. The situation where products are produced from a production process with variable fraction defective is considered. Bum-in schemes guaranteeing pre-specified outgoing quality of products are derived using the mixed binomial prior distribution for the number of defectives in a batch.

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