• Title/Summary/Keyword: 조동옥

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Correlation Among Items of Mechanical Tests in Raw Silk (생사기계검사 항목간의 상관관계)

  • 김영진;정지현;조동옥;이덕노
    • Journal of Sericultural and Entomological Science
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    • no.11
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    • pp.73-80
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    • 1970
  • This study was carried out in order to investigate the correlation among test items of export raw silk. The results obtained from the study are summarized as follows. 1. The highest correlation was between evenness and low evenness in case of the filaments made of autumn cocoons and the coefficient of correlation was 0.854. 2. Among following items, viz.; evenness and cleanness, neatness and low neatness and elongation and cohesion, the correlation phisically was not acknowledged, but the coefficients of correlation were high figures. 3. Poor correlation existed between following items, viz.; size deviation and maximum deviation, evenness and low evenness, neatness and low neatness, cleanness and low neatness. 4. It is considered that the high correlation exists between tenacity and elongation, but in this study the correlation existed among some items. 5. In this study it is a new fact that the correlation between neatness and cohesion as well as low neatness and tenacity existed enough highly. 6. As a conclusion the independence of ten items tested at present was acknowledged.

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Improved LEACH Algorithm in Wireless Sensor Networks (무선 센서 네트워크에서 개선된 LEACH 알고리즘)

  • Lim, Gyugeun;Cho, Dongok;Koh, Jingwang
    • Proceedings of the Korea Information Processing Society Conference
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    • 2015.04a
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    • pp.231-233
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    • 2015
  • 무선 센서 네트워크는 다수의 센서 노드와 하나의 싱크노드로 구성된다. 센서 네트워크상에 분포된 센서 노드들은 데이터 전송 중에 배터리 재충전이나 변경이 곤란하다. 센서들의 제한적 특성을 때문에 일반 유선 네트워크와 달리 에너지 효율적인 네트워크 설계를 요구한다. 이러한 문제를 해결하기 위해 계층적 클러스터 라우팅 프로토콜로서 LEACH 프로토콜을 분석하고, 센서들의 에너지 소모를 줄이고, 네트워크 수명을 연장하는 개선된 LEACH 라우팅 프로토콜을 제안한다. 최적 클러스터를 결정하는 기법을 이용하여 클러스터 수를 고려한 클러스터를 형성하고, 성능 분석은 MATALAB을 이용하여 시뮬레이션 하였으며, 본 개선된 프로토콜이 LEACH 프로토콜과 비교하여 우수함을 보였다.

Reports Plagiarism Inspection for Efficient Implementing e-learning System (효과적인 e-런닝 시스템 구축을 위한 과제물 표절 검사)

  • 조동욱;홍윤선;조선옥
    • Proceedings of the Korea Contents Association Conference
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    • 2003.11a
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    • pp.53-59
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    • 2003
  • Recently, social interest are increasing to e-learning system. for realizing efficient e-teaming system, reports plagiarism inspection is the most important topic. This paper describes the methods of reports plagiarism inspection and analyzing the S/W tools to implement e-learning system.

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