• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.5
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• pp.157-164
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• 2021

Recently, a number of studies have been conducted on photocatalysts and adsorbents that can remove harmful substances to improve environmental problems related to fine particles. In this study, a porous foam composites were fabricated using palm-based activated carbon having a large amount of micro-pores and foam concrete with a significantly larger total pore volume compared to general construction materials. To evaluate the adsorption potential of fine particles, the pore structure of the foam composites were analyzed. For the analysis of the pore structure of the foam composite, BET and Harkins-jura theory were applied from the measured nitrogen adsorption isotherm. From the results of the analysis, the specific surface area and micro-pore volume of the foam composite containing activated carbon increased significantly compared to Plain. As thereplacement of activated carbon increased, the specific surface area and micro-pore volume of the foam composite tended to increase. It seems that the foam composite has high adsorption performance for gaseous fine particle precursor such as nitrogen oxides.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.11a
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• pp.253-254
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• 2008

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.523-524
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.99-100
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.573-574
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• 2010

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.657-658
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• 2009

• Journal of Welding and Joining
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• v.22 no.4
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• pp.24-28
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• 2004

마이크로 접합 공정은 미세 부품이나 박판의 접합에 사용되며, 이를 위해 다양한 공정이 개발되었다. 최근 MEMS(Micro Electro Mechanical System)활용 범위가 증가하고 있으며, MEMS에 사용되는 미세한 구조물의 접합이나 패키징에 접합 공정이 활용되고 있다. MEMS는 발전 단계이지만 전자 패키징(electronic packaging)은 성숙 단계인 반도체 산업에 사용되고 있다.(중략)

• Ceramist
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• v.7 no.3
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• pp.21-27
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• 2004

MEMS(Micro Electro Mechanical Systems)는 초소형 구조물의 제작 기술인 마이크로머시닝 기술을 이용하여 제작되는 초소형 전자기계 시스템을 말한다. 최근 10여 년간 MEMS 기술이 상당히 진척되었고 다양한 마이크로머시닝 기술이 개발되었다. 이에 따라 이를 이용하여 다양한 MEMS 소자의 개발이 이루어지고 있다. 그 중에서도 MEMS 센서는 비교적 간단한 제작 공정과 작은 크기, 그리고 저비용으로 인하여 상품화가 쉽게 이루어지고 있다. (중략)

• Journal of the Korean Society for Precision Engineering
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• v.18 no.12
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• pp.22-29
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• 2001

• Journal of the Korea institute for structural maintenance and inspection
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• v.12 no.4
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• pp.161-167
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• 2008

In this paper, the optimal design of trusses using advanced analysis and genetic algorithm is performed. An advanced analysis takes into account geometric nonlinearity and material nonlinearity. The micro genetic algorithm is used as optimization technique. The weight of structures is treated as the objective function. The constraint functions are defined by load-carrying capacities and displacement requirement. The effectiveness of the proposed method is verified by comparing the results of the proposed method with those of other method.