• Title/Summary/Keyword: round robin test

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Round-robin Test Results of AC Losses in a Practical Bi-2223 Tape (Bi-2223테이프의 교류손실에 관한 round-robin테스트 결과)

  • Kim, Hyun-Jun;Ryu, Hyung-Woo;Choi, Byoung-Ju
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.780-782
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    • 2003
  • 60 Hz의 전력분야에 고온초전도체를 적용 하는데 있어 가장 큰 장애요소인 교류손실에 대한 연구의 일환으로서 한 일간의 상이한 시험방법 및 장치에 대한 신뢰성과 정밀도를 상호 확인하기 위해 동일한 샘플 및 동일 시험조건으로 양측에서 round-robin테스트를 하였다. 그 주요 결과는 양측에서 측정한 자화손실은 시험 방법 및 장치의 상이함에도 불구하고 비교적 잘 일치하였다. 이는 자화손실 측정 시, 금기사항으로 되어있는 철심자석의 사용이 문제가 되지 않음을 의미하며, 이는 다시 기존 자화손실 시험장치의 공심자석 및 자석용 전원 설비가 대단히 소형화될 수 있음을 의미한다.

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Evaluation on the Measurement Capability of Gauge Blocks for National Calibration and Test Institutions (길이분야 국가교정검사기관에 대한 게이지블록의 측정능력 평가)

  • Lee, Yong Sang;Eom, Cheon Il;Kang, Chu-Shik;Eom, Tae Bong;Han, Jin Wan;Kirn, Myung Soon;Chung, Myung Sai
    • Journal of the Korean Society for Precision Engineering
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    • v.13 no.2
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    • pp.62-66
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    • 1996
  • Since 1980, Korea Research Institute of Standards and Science (KRISS) have performed 8 round robin tests in gauge block measurement in order to evaluate the measurement capability and the state of environment control of National Calibration and Test Institutions. Two sets of five gauge blocks (nominal size : 1, 3, 10, 25, 100 mm) having different thermal expansion coefficients for each set were circulated for the measurement, and the measurement results were collected and analyzed to evaluate the traceability to the standard of KRISS. The method and results of the test are presented.

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Results of the First Round-Robin-Test for Evaluation of Mechanical Properties in Bi-2223 Composite Superconductors (산화물 복합초전도체(Bi-2223)의 기계적특성 평가를 위한 라운드로빈 시험 결과)

  • 신형섭
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 2001.02a
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    • pp.13-16
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    • 2001
  • In the practical sense, it is important to assess the Young modulus and the degradation of $I_{c}$ due to mechanical deformation in HTS tapes for designing superconducting magnets. In order to establish a test method of mechanical properties in oxide composite superconductors, the committee of VAMAS/TWA 16-Subgroup proposed an international round robin test. The first effort has been focused on the multifilamentary Bi-2223 tapes. Eight groups participated in the RRT activity and each group carried out the tensile test by their own professional technique to three kinds of Bi-2223 tapes. The experimental details were reported and discussed for your information.

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A Round Robin Study of Solid Content Test and Applicability Estimation of FT-IR Analysis for Chemical Admixtures (다자비교시험을 통한 화학혼화제 고형분량 시험법의 신뢰성 및 FT-IR 분석에 대한 효용성 평가)

  • Kim, Jin-Cheol;Yoo, Hyeok-Jin;Kim, Hong-Sam;Park, Ko-Eun
    • Journal of the Korea Concrete Institute
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    • v.27 no.6
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    • pp.695-703
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    • 2015
  • Acceptance criteria for chemical admixtures of cement concrete were investigated in domestic and international specifications. The reliability was verified for solid content test method of chemical admixture examined statistical analysis by round robin test. The applicability of FT-IR spectroscopy for qualitative measurement of multi-compound chemical admixtures verified. From solid content experimental results, outlier analysed using Cochran, Grubbs and Dickson's Q test. Repeatability and reproducibility standard deviation for solid content results showed 0.25 and 0.098% respectively according to KS A ISO 5725-2 procedure, it can be confirmed reliability of test methods. FT-IR spectrum of liquefied or oven-dried chemical admixtures condition showed big differences. It is needed that the FT-IR analysis is performed on dry material. However there's no difference with the applicability of FT-IR spectroscopy for multi-compound chemical admixtures. So the utility of method analysis could not identify.

Traffic Distributed Processing System Implementation on the Web Sever Networking (웹서버 네트워킹에서의 트래픽분산 처리 시스템 구현)

  • Park, Gil-Cheol;Sung, Kyung;Kim, Seok-Soo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.4
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    • pp.846-853
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    • 2004
  • This paper introduces implementation of a traffic distributed processing system on the Web Sever Networking. The study used two software packages (Packet Capture and Round-Robin Test Package) to check packet quantity from Virtual Network Structure (data generator, virtual server, Serve. 1, 2, 3), and could find out traffic distribution toward Server 1, 2, and 3. The functions of implemented Round-Robin Load Balancing Monitoring System include Round-Robin testing, system monitoring, and graphical indication of data transmission/packet quantity (figures & diagram). As the result of the study shows, Round-Robin Algorithm ensured definite traffic distribution, unless incoming data loads differ much. Although error levels were high in some cases, they were eventually alleviated by repeated tests for a long period of time.