• Title/Summary/Keyword: CD-ROM

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A Study on Electronic Dewey, the CD-ROM version of DDC (Electronic Dewey의 이용에 관한 연구)

  • 정연경;이선경
    • Proceedings of the Korean Society for Information Management Conference
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    • 1996.08a
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    • pp.63-66
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    • 1996

  • DDC는 1876년 멜빌 듀이에 의해 초판이 발행된 이후 21판의 개정판이 출판될 예정이며, 현재 전세계적으로 널리 사용되고 있는 세계적인 분류표이다. 이러한 DDC는 이제 인쇄본 형태뿐만이 아니라 기계가독형 형태인 CD-ROM으로까지 생산되기에 이르렀다. 본고에서는 DDC 최초의 기계가독형 형태인 Electronic Dewey Decimal Classification(EDDC)에 대해 살펴보고, 이를 실제로 사용해 본 학생들을 대상으로 조사한 설문지 결과를 중심으로 EDDC의 이용 가능성과 그에 필요한 여건에 관해 논하였다.

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Topology Optimization of Pick-up Actuator of CD-ROM for Vibration Reduction (위상 최적 설계를 통한 CD-ROM 광 픽업 액추에이터의 진동 저감)

  • Wang, Se-Myung;Kim, Yong-Su;Park, Ky-Hwan
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.06a
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    • pp.479-484
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    • 2000

  • The topology optimization of electromagnetic systems is investigated and the TOPEM (Topology Optimization for Electromagnetic Systems) is developed using the finite element method (FEM). The design sensitivity equation for topology optimization is derived using the adjoint variable method. The proposed method is validated by applying it to the topology optimizations of a C-core actuator and an optical pickup actuator.

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Changes in Inflammatory Mediators, Immunocompetent Cells and Bone Merrow Progenitor Cells by the Magnitude of Muscle Damage and Type of the Muscle Contraction in the Elderly (고령자의 근육수축양식 및 손상정도에 따른 염증물질, 면역적격세포 및 골수유래 전구세포의 변화)

  • Song, Sang-Hyup;Lee, Ho-Seong
    • 한국체육학회지인문사회과학편
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    • v.54 no.5
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    • pp.769-780
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    • 2015

  • This study investigated the changes in inflammatory mediators, immunocompetent cells and bone merrow progenitor cells by the magnitude of muscle damage and type of the muscle contraction in the elderly. Twenty older adults who had not been involved in a resistance-training program at least 6 months prior to the present study were assigned to eccentric exercise group (ECC, n=10) and concentric exercise group (CON, n=10). All subjects performed 10 sets of 6 maximal isokinetic eccentric (ECC 1) or concentric (CON) contractions with the non-dominant arm in a randomized, with 4 wk between bouts (ECC 2). Skeletal muscle damage index (ROM, VAS, Plasma CK), inflammation mediators (TNF-α, IL-1, IL-6), immunocomperent cells (CD3+, CD4+, CD8+, CD19+), bone merrow progenitor cell (CD34+) and leukocytes were measured before, immediately after, 2, 24, 48, 72, and 96 h after exercise. Changes in ROM and VAS were greater (P<.05) after ECC 1 than CON and ECC 2. Increases in TNF-α and IL-6 were greater (P<.05) 24, 48 and 72 h after ECC 1 than CON and ECC 2. Increases in neutrophils were greater (P<.05) 2 h after ECC 1 than CON and ECC 2. It was confirmed that muscle damage was greater following eccentric than concentric contractions as well as first bout than second bout in the elderly, and suggested that TNF-α, IL-6 and neutrophils should closely correlate with magnitude of muscle damage.