Results 251 to 260 of about 78,397 (271)

Light Emission in Periodically Microstructured Porous Silicon

Conference on Lasers and Electro-Optics-Europe, 1998
It has been shown experimentally that the periodic microstructuring of the porosity in porous silicon (PS) resonant cavity light emitting devices (RCLEDs) radically improves their emission linewidth and beam quality1. However, an important issue not yet fully addressed is the precise role played by this periodic microstructuring, given that the ...
E.K. Squire, P.A. Snow, P. St. J. Russell, L.T. Canham, A.J. Simons, C.L. Reeves   +5 more
openaire   +1 more source

Design of periodic elastoplastic energy dissipating microstructures

Structural and Multidisciplinary Optimization, 2018
The design of periodic elastoplastic microstructures for maximum energy dissipation is carried out using topology optimization. While the topology optimization of elastic microstructures has been performed in numerous studies, microstructural design considering inelastic behavior is relatively untouched due to a number of reasons which are addressed in
Ryan Alberdi, Kapil Khandelwal
openaire   +1 more source

Optimal design of periodic linear elastic microstructures

Computers & Structures, 2000
Abstract This paper presents two computational models to design the periodic microstructure of cellular materials for optimal elastic properties. The material equivalent mechanical properties are obtained through a homogenization model. The two formulations address the problem of finding the optimal representative microstructural element for periodic
M.M. Neves, H. Rodrigues, J.M. Guedes
openaire   +1 more source

Investigation of periodical microstructures using coherent radiation

SPIE Proceedings, 2010
Low-cost effective characterization methodology was developed that allows indirect evaluation of mechanical, geometrical and optical parameters of periodical microstructures in the cases when traditional measurement techniques are not suitable. Proposed methods are applicable for optimization and control of technological processes.
Giedrius Janusas, Arvydas Palevicius, Regita Bendikiene, Paulius Palevicius   +3 more
openaire   +1 more source

Optimization of Bodies with Locally Periodic Microstructure

Mechanics of Advanced Materials and Structures, 2012
This article describes a numerical study of the optimization of elastic bodies featuring a locally periodic microscopic pattern. The authors’ approach makes the link between the microscopic level and the macroscopic one. Two-dimensional linearly elastic bodies are considered; the same techniques can be applied to three-dimensional bodies ...
Cristian Barbarosie, Anca-Maria Toader
openaire   +1 more source

A periodic relaxation method for computing microstructures

Applied Numerical Mathematics, 2000
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openaire   +1 more source

DNA Localization and Stretching on Periodically Microstructured Lipid Membranes

Physical Review Letters, 2006
We study the conformational behavior of DNA molecules adsorbed on cationic-lipid membranes that are supported on grooved, one-dimensionally periodic microstructured surfaces. We reveal a striking ability of these periodically structured membranes to stretch DNA coils.
Marion B, Hochrein, Judith A, Leierseder, Leonardo, Golubović, Joachim O, Rädler   +3 more
openaire   +2 more sources

Relaxation mechanisms of photoinduced periodic microstructures in ferrofluid layers

Physical Review E, 2011
We consider theoretically and numerically a periodic concentration grating induced in a layer of ferrofluid in the presence of the external magnetic field by nonuniform optical heating through photoabsorption. The stationary profiles of the periodic microstructures are governed by the equilibrium of the diffusive, thermodiffusive, and magnetic fluxes ...
Dmitry, Zablotsky, Elmars, Blums
openaire   +2 more sources

Mechanics of Electrostrictive Materials With Periodic Microstructure

Adaptive Structures and Material Systems, 1999
Abstract The effective properties as well as local elastic and electric fields in smart electrostrictive composite materials with periodic microstructure are estimated by using the Fourier series technique (Nemat-Nasser et al., 1993) and the equivalent inclusion method (Eshelby, 1957).
T. Somphone, N. Yu
openaire   +1 more source

Laterally graded period layered synthetic microstructures

Applied Optics, 1988
R, Philip, R, Rivoira, Y, Lepetre, G, Rasigni   +3 more
openaire   +2 more sources