Erratum to “Optical parameter values of the Ewald method with electrostatic layer correction for Coulomb interactions in slab geometry” [Journal of Molecular Structure 792 (2006) 56–61]

2008 ◽  
Vol 873 (1-3) ◽  
pp. 195
Author(s):  
A. Bródka
Keyword(s):  
Molecular Structure ◽  
Optical Parameter ◽  
Coulomb Interactions ◽  
Slab Geometry ◽  
Ewald Method ◽  
Parameter Values

Bifurcation to vortex solutions in superconducting films

1997 ◽  
Vol 8 (2) ◽  
pp. 125-148 ◽  
Author(s):  
T. BOECK ◽  
S. J. CHAPMAN
Keyword(s):  
Magnetic Field ◽  
Superconducting Films ◽  
Leading Order ◽  
Nonlinear Stability Analysis ◽  
Slab Geometry ◽  
Weakly Nonlinear ◽  
Double Eigenvalue ◽  
Wide Range ◽  
Vortex Solutions ◽  
Parameter Values

The bifurcation from a normally conducting state to a superconducting state in a decreasing magnetic field is studied for a slab geometry. The leading eigenvalue is a double eigenvalue, leading to a rich structure of possible behaviours. A weakly-nonlinear stability analysis is performed, and the possible responses of the material are classified. Finally, the leading-order equations are solved numerically for a wide range of parameter values to determine which of these behaviours will occur in practice.

scholarly journals Peculiarities of Matrix-Element Calculations with Few Coulomb Functions for Particles’ Scattering Processes

2018 ◽  
Vol 173 ◽  
pp. 03007 ◽  
Author(s):  
Ochbadrakh Chuluunbaatar ◽  
Konstantin Kouzakov ◽  
Yuri Popov
Keyword(s):  
Matrix Element ◽  
Momentum Space ◽  
Space Representation ◽  
Coulomb Interactions ◽  
Fast Proton ◽  
Final State ◽  
The Matrix ◽  
Coulomb Singularity ◽  
Parameter Values ◽  
He Atom

Specific features of the matrix-element calculations in the momentum-space representation are discussed for the single ionization of the He atom by fast proton impact in the case when the Coulomb interactions of all three charged fragments in the final state are taken into account. It is shown that a “soft” smoothing of the Coulomb singularity does not affect the accuracy of the calculations in a certain region of the smoothing parameter values.

scholarly journals A Random Batch Ewald Method for Particle Systems with Coulomb Interactions

2021 ◽  
Vol 43 (4) ◽  
pp. B937-B960
Author(s):  
Shi Jin ◽  
Lei Li ◽  
Zhenli Xu ◽  
Yue Zhao
Keyword(s):  
Particle Systems ◽  
Coulomb Interactions ◽  
Ewald Method

COHERENT FOURIER COMPONENTS IN THE LISA MEASUREMENT BANDWIDTH FROM TEST MASS CHARGING: ESTIMATES AND SUPPRESSION

2005 ◽  
Vol 14 (01) ◽  
pp. 51-71 ◽  
Author(s):  
DIANA N. A. SHAUL ◽  
TIM J. SUMNER ◽  
GEOFF K. ROCHESTER
Keyword(s):  
Solar Wind ◽  
Cosmic Rays ◽  
Test Mass ◽  
Temporal Behavior ◽  
Geodesic Motion ◽  
Coulomb Interactions ◽  
Coherent Signals ◽  
Signal To Noise ◽  
Typical Parameter ◽  
Parameter Values

The success of LISA is dependent on the precision with which the test masses, the interferometer mirrors, can maintain pure geodesic motion. Their accumulation of charge from cosmic rays and solar wind particles can give rise to spurious Lorentz and Coulomb forces. Coherent Fourier components, which appear due to the time dependence of the amount of charge accrued, are estimated to exceed the acceleration noise target. The general forms of these signals are derived. It is shown that for typical parameter values, coherent signals with significant signal-to-noise ratios can result from Coulomb interactions, while the signal from Lorentz interactions is expected to fall below the instrumental noise target. In this description, the signals' peak magnitudes are shown to increase with decreasing frequency. Hence their impact may be greater for missions that aim to look for gravitational waves at frequencies below the nominal LISA band. It is expected that the accuracy with which these signals can be removed from the data will depend on deviations from the predictable temporal behavior of the parameters on which they are dependent. Methods to substantially decrease these signals for LISA are discussed.

Molecular Structure of the Outermost Cell Wall Component of Spirillum Serpens

1977 ◽  
Vol 35 ◽  
pp. 342-343
Author(s):  
Wah Chiu ◽  
David Grano
Keyword(s):  
Molecular Structure ◽  
Cell Wall ◽  
Outer Membrane ◽  
Gel Electrophoresis ◽  
Electron Microscopic Examination ◽  
Electron Microscopic ◽  
Cell Wall Component ◽  
Protein Components ◽  
Exposure Technique ◽  
Structural Aspects

The periodic structure external to the outer membrane of Spirillum serpens VHA has been isolated by similar procedures to those used by Buckmire and Murray (1). From SDS gel electrophoresis, we have found that the isolated fragments contain several protein components, and that the crystalline structure is composed of a glycoprotein component with a molecular weight of ∽ 140,000 daltons (2). Under an electron microscopic examination, we have visualized the hexagonally-packed glycoprotein subunits, as well as the bilayer profile of the outer membrane. In this paper, we will discuss some structural aspects of the crystalline glycoproteins, based on computer-reconstructed images of the external cell wall fragments.The specimens were prepared for electron microscopy in two ways: negatively stained with 1% PTA, and maintained in a frozen-hydrated state (3). The micrographs were taken with a JEM-100B electron microscope with a field emission gun. The minimum exposure technique was essential for imaging the frozen- hydrated specimens.

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