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Mathematical Modeling of Metal Active Gas (MAG) Arc Welding

Journal of Materials Science & Technology 2001年第1期17卷 167-168页

作者： Takayoshi Ohji Yoko Tsuji fumikazu miyasakn and takeshi yamamoto department of adaptive machine systems, osaka university 2-l, yamada-oka, suita, osaka, 565-0871, japan Dep. of adaptive machine Syst. Osaka Univ. Osaka 565-0871 Japan

In the present paper. a numerical model for MAG (metal active gas) arc welding of thin plate has been developed. In MAG arc welding, the electrode wire is melted and supplied into the molten pool intermittently. Accordingly, it is assumed on the modeling that the thermal energy enters the base-plates through two following mechanisms, i.e., direct heating from arc plasma and 'indirect' heating from the deposited metal. In the second part of the paper, MAG arc welding process is numerically-analyzed by using the model. and the calculated weld bead dimension and surface profile have been compared with the experimental MAG welds on steel plate. As the result. it is made clear that the model is capable of predicting the bead profile of thin-plate MAG arc welding, including weld bead with undercutting.

关键词： POOl

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Roles of N-cadherin in cerebral cortical development:cooperation with membrane trafficking and actin cytoskeletal regulation

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Neural Regeneration Research 2025年第1期20卷 188-190页

作者： Shiho Ito takeshi Kawauchi department of adaptive and Maladaptive Responses in Health and Disease Graduate School of MedicineKyoto UniversityKyotoJapan department of Physiology Keio University School of MedicineTokyoJapan

Cell adhesion plays pivotal roles in the morphogenesis of multicellular *** cells form several types of cell-to-cell adhesion,including zonula occludens(tight junctions),zonula adhaerens(adherens junctions),and macula adhaerens(desmosomes).Although these adhesion complexes are basically observed only in epithelial cells,cadherins,which are the major cell adhesion molecules of adherens junctions,are expressed in both epithelial and non-epithelial tissues,including neural tissues(Kawauchi,2012).The cadherin superfamily consists of more than 100 members,but classic cadherins.

关键词： cerebral skeletal cooperation

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Science letters:Cellular growth under hydrostatic pressure using bovine aortic EC-SMC co-cultured ePTFE vascular graft

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Journal of Zhejiang university-Science B(Biomedicine & Biotechnology) 2005年第2期6卷 79-82页

作者：孙雷 NIWA Koichi 林建忠 KARINO takeshi department of Mechanics Zhejiang university Hangzhou 310027 China Research Institute for Electronic Science Hokkaido university North 12 West 6 North District Sapporo 060-0812 Japan Research Institute for Electronic Science Hokkaido university North 12 West 6 North District Sapporo 060-0812 Japan

High blood pressure (hypertension) is implicated in the development of atherosclerosis. Blood vessels are constantly subjected to stretch due to blood pressure and changes in stretch usually instigate adaptive vascular remodeling, including abnormal growth and proliferation of vascular smooth muscle cells (VSMCs) as well as extracellular matrix (ECM). In this experiment, we used bovine aortic endothelial cells and smooth muscle cells (EC-SMC) co-cultured ePTFE vascular grafts subjected to normal atmospheric pressure (as a control), and 100 mmHg hydrostatic pressure for 7 d. The increase of cell layer thickness was observed. When measured, the cell layer thickness increased by 116.2%. The increase of collagen (Type Ⅳ)synthesis was also observed in the immunohistochemistry assay. When stained with toluidine blue, the cells showed metachromatic phenomenon.

关键词： Pressure ePTFE graft EC-SMC co-culture Collagen Proliferation Metachromatic

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