scholarly journals Vortex dynamics in self-dual Maxwell-Higgs systems with a uniform background electric charge density

1994 ◽  
Vol 49 (8) ◽  
pp. 4265-4276 ◽  
Author(s):  
Ki-Myeong Lee
Keyword(s):  
Charge Density ◽  
Electric Charge ◽  
Vortex Dynamics ◽  
Electric Charge Density ◽  
Uniform Background

Analogous formulation of electrodynamics and two-dimensional fluid dynamics

2014 ◽  
Vol 761 ◽  
Author(s):  
Rick Salmon
Keyword(s):  
Fluid Dynamics ◽  
Charge Density ◽  
Compressible Flow ◽  
Vortex Dynamics ◽  
Point Vortex ◽  
Point Vortices ◽  
Classical Electrodynamics ◽  
Two Dimensional ◽  
Electric Charge Density ◽  
Limiting Case

AbstractA single, simply stated approximation transforms the equations for a two-dimensional perfect fluid into a form that is closely analogous to Maxwell’s equations in classical electrodynamics. All the fluid conservation laws are retained in some form. Waves in the fluid interact only with vorticity and not with themselves. The vorticity is analogous to electric charge density, and point vortices are the analogues of point charges. The dynamics is equivalent to an action principle in which a set of fields and the locations of the point vortices are varied independently. We recover classical, incompressible, point vortex dynamics as a limiting case. Our full formulation represents the generalization of point vortex dynamics to the case of compressible flow.

Activation of Hydroxyapatite Crystal Growth on the Surface of Biomimetic Synthetic Apatites through Electrical Polarization

2005 ◽  
Vol 284-286 ◽  
pp. 521-524
Author(s):  
Simone Sprio ◽  
Gian Carlo Celotti ◽  
Elena Landi ◽  
Anna Tampieri
Keyword(s):  
Crystal Growth ◽  
Chemical Composition ◽  
Charge Density ◽  
Electric Charge ◽  
Electrical Polarization ◽  
Natural Bone ◽  
Electric Charge Density ◽  
Hydroxyapatite Crystal ◽  
Thermally Stimulated Depolarization

A series of synthetic apatites bulk samples, characterized by different atomic substitutions were polarized by field of 1 and 2 kV·cm-1 at 300 °C. The thermally stimulated depolarization currents (TSDC) were measured and the stored electric charge density evaluated. The recent development in the synthesis of non-stoichiometric HA powders, whose chemical composition resembles that of the natural bone, is promising for the realization of improved biomimetic implants for bone substitution; therefore, electrical polarization applied on the ceramic pieces could further enhance the already strong bioactivity of these materials. The depolarization processes in the various material were evaluated by the Arrhenius’ method and related with the corresponding chemical features; finally, SEM observations of some polarized samples immersed in SBF at 37 °C revealed a wide growth of HA particles within a few days in all the investigated materials.

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