نتایج جستجو برای: electrostatic field gradient

تعداد نتایج: 918134  

Journal: :Bulletin of the American Mathematical Society 1946

2011
Sergey Osechinskiy Frithjof Kruggel

A novel approach to identifying poorly resolved boundaries between adjacent sulcal cortical banks in MR images of the human brain is presented. The algorithm calculates an electrostatic potential field in a partial differential equation (PDE) model of an inhomogeneous dielectric layer of gray matter that surrounds conductive white matter. Correspondence trajectories and geodesic distances are c...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Daniel R Ripoll Jorge A Vila Harold A Scheraga

The role of electrostatic interactions in determining the native fold of proteins has been investigated by analyzing the alignment of peptide bond dipole moments with the local electrostatic field generated by the rest of the molecule with and without solvent effects. This alignment was calculated for a set of 112 native proteins by using charges from a gas phase potential. Most of the peptide ...

Journal: :Physical Review Special Topics - Accelerators and Beams 2010

Journal: :Facta universitatis - series: Electronics and Energetics 2002

2011
A. T. Hammack N. A. Gippius Sen Yang G. O. Andreev L. V. Butov A. C. Gossard

We consider in-plane electrostatic traps for indirect excitons in coupled quantum wells, where the traps are formed by a laterally modulated gate voltage. An intrinsic obstacle for exciton confinement in electrostatic traps is an in-plane electric field that can lead to exciton dissociation. We propose a design to suppress the in-plane electric field and, at the same time, to effectively confin...

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