نتایج جستجو برای: coopernaghdi thick shell model

تعداد نتایج: 2177712  

Journal: :Computer Methods in Applied Mechanics and Engineering 2022

This paper presents a kinematically consistent second-order computational homogenisation scheme for shear deformable shells. The proposed framework can accurately evaluate the membrane, bending, and transverse components of shell resultants tangent operators, whilst showing no size dependency on fine scale model. To date, proper extension to thick model, such as 5-parameter formulation, remains...

2001
Daniele Gerion Fabien Pinaud Shara C. Williams Wolfgang J. Parak Daniela Zanchet Shimon Weiss Paul Alivisatos

We describe the synthesis of water-soluble semiconductor nanoparticles and discuss and characterize their properties. Hydrophobic CdSe/ZnS core/shell nanocrystals with a core size between 2 and 5 nm are embedded in a siloxane shell and functionalized with thiol and/or amine groups. Structural characterization by AFM indicates that the siloxane shell is 1-5 nm thick, yielding final particle size...

Journal: :Nanoscale 2015
Dan Wang Bin Xue Xianggui Kong Langping Tu Xiaomin Liu Youlin Zhang Yulei Chang Yongshi Luo Huiying Zhao Hong Zhang

The in vivo biological applications of upconversion nanoparticles (UCNPs) prefer excitation at 700-850 nm, instead of 980 nm, due to the absorption of water. Recent approaches in constructing robust Nd(3+) doped UCNPs with 808 nm excitation properties rely on a thick Nd(3+) sensitized shell. However, for the very important and popular Förster resonance energy transfer (FRET)-based applications,...

Journal: :International Journal for Numerical Methods in Engineering 1994

2013
Maryvonne Charrier Arul Marie Damien Guillaume Laurent Bédouet Joseph Le Lannic Claire Roiland Sophie Berland Jean-Sébastien Pierre Marie Le Floch Yves Frenot Marc Lebouvier

Ecophenotypes reflect local matches between organisms and their environment, and show plasticity across generations in response to current living conditions. Plastic responses in shell morphology and shell growth have been widely studied in gastropods and are often related to environmental calcium availability, which influences shell biomineralisation. To date, all of these studies have overloo...

Journal: :The Journal of Biophysical and Biochemical Cytology 1956
Hans Ris

Amphibian lampbrush chromosomes and meiotic prophase chromosomes of various insects and plants consist of a bundle of microfibrils about 500 A thick. These fibrils are double, being made of two closely associated fibrils 200 A thick. Fragments of interphase nuclei contain a mass of fibrils 200 A thick. Ultrathin sections through nuclei in prophase or interphase show sections of these double or ...

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