• Title/Summary/Keyword: 조준형

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형상모델링 시스템을 이용해 생성된 유한요소 메쉬의 가시화

  • 조준면;한순흥
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.04a
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    • pp.565-570
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    • 1995
  • 자동화 시스템이 형상모델링 시스템을 기반으로 구축된다면 형상모델링 시스템의 자료구조 및 제공되는 기능에 의존하게 된다. 따라서 형상모델링 시스템의 자료구조로 부터 각 시스템이 필요로하는 정보를 추출 하는 인터페이스 모듈 개발이 중요하다. 본 논문에서는 개방형 형상모델러를 기반으로, 설계 자동화의 대상이 되고 있는 유한 요소 모델링 방법에대해 살펴보고, 이 결과를 가시화 도구 PEX1ib와 X- window/Motif를 이용하여 가시화 하는 시스템에 대해 기술한다. 개방형 형상모델러로는 미국 Spatial Technology사의 ACIS를 이용하였다.

Wastewater Treatment of Papermaking by Using Oyster Shells (굴폐각을 이용한 제지폐수 처리)

  • Cho Jun Hyung;Cho Jung Won;Lee Young Won;Lim Tawk lun
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.36 no.4 s.107
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    • pp.60-66
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    • 2004
  • In this paper, oyster shell, diatomaceous earth, and active carbon were used as filter media for treating wastewater produced in paper mills. After filtering, the changes of COD and turbidity were investigated. As the results of estimating the efficiency of wasterwater treatment, porous oyster shell having higher specific surface area in powder was more effective than the others in removal of contaminants in waterwater, especially turbidity.

Study on the Expression Dehydration by Recycling of Paper Sludge (제지 슬러지 재활용에 의한 압착 탈수)

  • Cho Jun Hyung;Cho Jung Won
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.36 no.4 s.107
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    • pp.77-82
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    • 2004
  • Expression-deliquoring tests using three types of paper sludges (tissue, newsprint, and paperboard) as deliquoring agent were carried out in order to investigate the effects of sludge dosage and pressure on the expression-deliquoring of slurry. The addition of deli­quoring agent causes expression-deliquoring of slurry to be faster than would be the case without the deliquoring agent. In case of the tissue sludge, the highest compression rate was achieved when $5\%$ of deliquoring agent was added, while in cases of the news­print and the paperboard sludge, $7\%$. Compression rate was increased as pressure increases. Porosity was decreased as pressure increases. The lowest porosity was observed when $5\%$ of tissue sludge was added. When compared the weight of cake where deliquoring agent was not added and the weight of cake that was fastest expression-deliquoring, there was about $17.5\%$ of the weight reduction

The Effects of Surface-Modified Pigment on the Properties of Coated Paper (표면 개질된 도공안료가 도공지의 특성에 미치는 영향)

  • 이희명;민동진;이용규;조준형;김용식
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.35 no.3
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    • pp.13-20
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    • 2003
  • This study was carried out to investigate the effect of surface modified pigments on the properties of coated paper. The selected core particle(clay, talc) and fine particle(TiO$_2$) were modified by hybridization. The optical properties of modified pigments, rheological properties of coating color, and optical properties of coated paper were investigated. It was found that particles formed sphere-like shape and became more uniform during the surface modification in the hybridization system. As a result, It was estimated that surface modification of TiO$_2$ turned out to be more effective in improving optical properties of pigment and coated paper than simply blending it.