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Mostrando ítems 1-10 de 24
Artículo
Stability analysis of conducting jets under ac radial electric fields for arbitrary viscosity
(AIP Publishing, 2003-02)
A temporal linear modal stability analysis is presented for conducting viscous liquid jets flowing with nonzero velocity relative to an ambient gas and subjected to an ac radial electric field. Parametric resonance between ...
Artículo
Electronic states for excess electrons in polyethylene compared to long-chain alkanes
(Elsevier, 2003)
We use a pseudopotential model to calculate the electronic states available to an excess electron in crystalline and amorphous regions of model polyethlyene as well as the molecular crystal of the linear alkane C27H56. It ...
Artículo
Influence of moving breathers on vacancies migration
(Elsevier, 2003)
A vacancy defect is described by a Frenkel-Kontorova model with a discommensuration. This vacancy can migrate when interacts with a moving breather. We establish that the width of the interaction potential must be larger ...
Artículo
Interaction of Moving Localized Oscillations with a Local Inhomogeneity in Nonlinear Hamiltonian Klein-Gordon Lattices
(Springer, 2003-10)
We study the interaction of moving localized oscillations with a local inhomogeneity in a discrete nonlinear Hamiltonian system. We conjecture that resonance with a static nonlinear localized oscillation centered at the ...
Artículo
Positron beam analysis of structurally ordered porosity in mesoporous silica thin films
(ScienceDirect, 2003-09-15)
Positron beam techniques have been employed to characterise low-k dielectric silica based films, which have two or three dimensional structures of nanometre size pores. Pore fractions vary from 5 to 50%. Positrons implanted ...
Artículo
Using the finite domain remnant of the continuous spectrum to examine integrability: Effect of boundary conditions
(2003)
The aim of this work is to propose a method for testing the integrability of a model partial differential (PDE) and/or differential difference equation (DDE), by examining it in a finite but large domain. For monoparametric ...
Artículo
Nano-porosity in silica reinforced methyltrimethoxysilane coatings studied by positron beam analysis
(ScienceDirect, 2003-06)
The porosity in particle reinforced sol-gel coatings has been studied. Silica particles (Ludox-TM40) are introduced into methyl silicate coatings to increase the hardness, the elastic modulus and the fracture toughness. ...
Ponencia
Dynamics and deformation of a drop in a DC electric field
(IEEE Xplore, 2003-10)
We consider a single conducting drop in suspension in a poorly conducting liquid between two horizontal electrodes. When a DC field is applied to the electrodes, the drop charges and rises within the'liquid, then falls ...
Artículo
Systematic positron study of hydrophilicity of the internal pore surface in ordered low-k silica thin films
(ScienceDirect, 2003-09-15)
Non-destructive Doppler Broadening (DB), Positronium fraction (f-Ps) and Two Dimensional Angular Correlation of Annihilation Radiation (2D-ACAR), Positron Beam Analysis (PBA) techniques have been used to study well-ordered ...
Artículo
Charge transport in poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers
(Springer, 2003)
We investigate the charge transport in synthetic DNA polymers built up from single types of base pairs. In the context of a polaron-like model, for which an electronic tight-binding system and bond vibrations of the double ...