• 제목/요약/키워드: fiber analysis

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All-Fiber Microwave Signal Processing Device with Z-Shaped Double Coupler Optical Resonator (Z형 쌍-결합기 광 공진기를 이용한 광섬유 마이크로파 신호처리)

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    • Proceedings of the Optical Society of Korea Conference
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    • 1999.08a
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    • pp.116-117
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    • 1999
  • Optical fiber networks for microwave signal processing have been investigation . Theoretical and experimental results are presented in Z-shaped Double-Coupler Optical Resonator. The use of Mason's rule to calculate transfer functions greatly simplified the analysis in our model. A good comparison between modelling and experiment is presented.

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Motion Analysis of the Eccentric Driving Cam on Double Raschel Machine (더블 라셀기 편심캠 구동장치의 운동해석)

  • 권상석;김환국;김영규;전두환
    • Proceedings of the Korean Fiber Society Conference
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    • 2001.10a
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    • pp.147-150
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    • 2001
  • 더블 라셀기(Double Raschel Machine)는 레이스와 메리야스 직물 등을 생산하기 위한 섬유기계로써 대부분의 섬유기계들이 그러하듯이 수많은 링크와 기구들로 이루어져 있다. 따라서, 이러한 복잡한 링크들로 이루어진 기계 구조물을 국산화 개발하기 위해서는 설계오류에 따른 수많은 시행착오와 시간이 소요된다. (중략)

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Synchrotron SAXS Analysis of PTT/PTN Blends (PTT/PTN 블렌드의 Synchrotron SAXS 분석)

  • 김영호;최재원;이한섭
    • Proceedings of the Korean Fiber Society Conference
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    • 2001.10a
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    • pp.417-419
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    • 2001
  • 폴리(트리메틸렌 테레프탈레이트)(PTT)와 폴리(트리메틸렌 나프탈레이트)(PTN)는 모두 방향족 폴리에스테르계 고분자들이지만 같은 계열의 다른 고분자에 비해 연구가 많이 진행되어 있지 않다 특히 PTT가 포함된 블렌드계의 경우 최근에 들어서야 방향족 다른 폴리에스테르계 고분자와의 블렌딩에 관한 몇가지 보고가 있을 뿐이다[1-3]. (중략)

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Fabrication and Characterization of the Carbon Fiber Composite Sheets (탄소섬유를 이용한 열가소성 복합재료 시트 제조 및 특성)

  • Lee, Yun-Seon;Song, Seung-A;Kim, Wan Jin;Kim, Seong-Su;Jung, Yong-Sik
    • Composites Research
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    • v.28 no.4
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    • pp.168-175
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    • 2015
  • Recently, the applications of carbon fiber reinforced plastics (CFRPs) have become broader than ever when it comes to such industries as automotive, ships, aerospace and military because of their lightweight-ness and high mechanical properties. Thermosetting plastics like epoxy are frequently used as the binding matrix in CFRPs due to their high hardness, wetting characteristics and low viscosity. However, they cannot melted and remolded. For this reason, thermosetting plastic wastes have caused serious environmental problems with the production of fiber reinforced plastics. Thus, many studies have focused on the carbon fiber reinforced thermoplastics (CFRTPs) and recycling carbon fiber. In this study, recycled carbon fiber (RCF) was prepared from CFRPs using a pyrolysis method, which was employed to separate resin and carbon fiber. The degree of decomposition for epoxy resin was confirmed from thermal gravimetric analysis (TGA) and scanning electron microscope (SEM). The RCF was cut and ground to prepare a carbon fiber composite sheet (CFCS). CFCS was manufactured by applying recycled carbon fibers and various thermoplastic fibers. Various characterizations were performed, including morphological analyses of surface and cross-section, mechanical properties, and crystallization enthalpy of CFCS at different cooling conditions.

Analysis of Nutritional Components of Euonymus sieboldiana Leaves (참빗살나무 어린 순의 영양 성분 분석)

  • Kang, Min-Seung;Kim, So-Young;Lee, Yeon-Hee;Choi, Je-Wol;Baek, O-Hyun;Han, Hye-Kyung;Kim, Se-Na;Kim, Jung-Bong;Park, Hong-Ju;Cho, Young-Suk
    • Journal of the East Asian Society of Dietary Life
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    • v.21 no.6
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    • pp.918-923
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    • 2011
  • This study was aimed to investigate the nutritional components such as proximate content, minerals, vitamins, and dietary fiber of Euonymus sieboldiana leaves. The leaf sample used was fresh material produced in April in the Republic of Korea. As a result, the fresh leaf sample contained 10.30% crude carbohydrates, 7.42% crude proteins, 0.69% crude fat, and 1.46% crude ash, including a high amount of potassium (0.73%). The total dietary fiber, insoluble dietary fiber, and soluble dietary fiber content was 8.77%, 7.60%, and 1.17%, respectively. Vitamin C was found to be 44.53 mg% using colorimetric analysis. We regarded E. sieboldiana as a potential health food material because of its abundant nutritional components like potassium, dietary fiber, and vitamin C.