• Title/Summary/Keyword: SPC

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Echinoderm Fauna of Dokdo, Korea

  • Choi In-Young;Hong Byung-Kyu;Jeon Kyeong-Am;Son Min-Ho
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.39 no.spc1
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    • pp.231-235
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    • 2006
  • Six echinoderm species were added to the echinoderm fauna of Dokdo, Korea based on the samples collected form inter - and subtidal areas of the Island on spring and autumn twice a year from 2002 to 2004. As result, sixteen echinoderm species were recorded from Dokdo.

- A Study on Control Charts for Safety and Environmental Performance Evaluation - (안전 및 환경성능평가를 위한 관리도에 관한 연구)

  • Choi Sung Woon
    • Journal of the Korea Safety Management & Science
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    • v.6 no.4
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    • pp.195-213
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    • 2004
  • This paper deals with an efficient and effective method on measuring, monitoring and evaluating safety and environmental performances of a process using SPC control charts. We propose 7 safety control charts as a tool to monitor hazard dendritics, and we propose 15 environment control charts to monitor pollution emissions. We also propose useful guidelines that SPC(Statistical Process Control) control charts can be used for safely and environmental monitoring.

Implementation and Improvement Strategies of Scientific Techniques in the Assessement Criteria of KS Certification (KS 인증 심사기준에서 과학적 기법의 적용 및 개선 방안)

  • Choi, Sung-Woon
    • Proceedings of the Safety Management and Science Conference
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    • 2010.04a
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    • pp.181-188
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    • 2010
  • The research presents the implementation and improvement strategies of scientific methodologies and techniques in the audit criteria of KS certification. The paper discusses the establishment of management strategy and quality policy by the alignment of BSC or policy deployment, the effective handling methodologies of control plan based on SPC, and the traceability of calibration uncertainty and MSA, etc.

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Control of Microgrid System with Super-capacitor and Battery (수퍼 커패시터와 배터리를 이용한 마이크로그리드 시스템의 제어)

  • Choi, Yongoh;Lee, Eonsuck;Chung, Sekyo;Song, Yujin
    • Proceedings of the KIPE Conference
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    • 2013.07a
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    • pp.242-243
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    • 2013
  • This paper presents a voltage and frequency regulation of a Micro-grid using a Battery energy storage system (BESS) and super-capacitor (SPC). The control methods for the both BESS and SPC are proposed to improve the regulation performance and battery life span. The simulation results using the PSCAD/EMTDC are provided to show the effectiveness of the proposed control.

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SPC Growth of Si Thin Films Preapared by PECVD (PECVD 방법으로 증착한 Si박막의 SPC 성장)

  • 문대규;임호빈
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1992.05a
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    • pp.42-45
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    • 1992
  • The poly silicon thin films were prepared by solid phase crystallization at 600$^{\circ}C$ of amorphous silicon films deposited on Corning 7059 glass and (100) silicon wafer with thermally grown SiO$_2$substrate by plasma enhanced chemical vapor deposition with varying rf power, deposition temperature, total flow rate. Crystallization time, microstructure, absorption coefficients were investigated by RAMAN, XRD analysis and UV transmittance measurement. Crystallization time of amorphous silicon films was increased with increasing rf power, decreasing deposition temperature and decreasing total flow rate.

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Statistical Process Control System based on WOLAP (WOLAP을 기반으로한 통계적 공정관리 시스템의 설계)

  • 김진호;박영배
    • Proceedings of the Korean Information Science Society Conference
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    • 1999.10a
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    • pp.132-134
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    • 1999
  • 통계적 공정관리(SPC)에 있어서 신속하고 정확한 공정분석은 품질과 생산성에 중대한 영향을 미치므로 정확한 공정 데이터의 수집, 빠른 데이터의 응답, 각 업무에 적당한 사용자 분석도구를 제공하는 분석하는 요구된다. 본 논문에서는 기존 SPC 환경에 WOLAP과 자바 기술을 기반으로 하여 다차원 구조로 데이터를 저장하여 빠른 분석 데이터 응답을 제공하고, 자바 애플릿 사용자 분석도구를 구현하여 사용과 관리가 용이하도록 하여 신속하고 정확한 분석과 개선 조치가 가능한 시스템을 설계하였다.

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