6,035 research outputs found
Effects of rotation and magnetic field on the onset of convective instability in a liquid layer due to buoyancy and surface tension
Thermocapillary stability characteristics of a horizontal liquid layer heated from below rotating about a vertical axis and subjected to a uniform vertical magnetic field are analyzed under a variety of thermal and electromagnetic boundary conditions. Results based on analytical solutions to the pertinent eigenvalue problems are discussed in the light of earlier work on special cases of the more general problem considered here to show in particular the effects of the heat transfer, nonzero curvature and gravity waves at the two-fluid interface. Although the expected stabilizing action of the Coriolis and Lorentz force fields in this configuration are in evidence the optimal choice of an appropriate range for the relevant parameters is shown to be critically dependent on the interfacial effects mentioned above
Two-Particle Correlations and Mixing
We study the EPR correlation implied by the entangled wavefunction of the
pair created by the (4S) resonance. The analysis uses
the basis provided by the mass eigenstates rather than the flavour
states . Data on the inclusive dilepton charge ratio are close
to the expectation of quantum mechanics, but nearly 8 standard deviations away
from that of complete decoherence.Comment: 10 pages, Latex, no figure
CP-Violating Correlations between Lepton-Charge and Jet-Charge in Z -> b\bar b events
Correlations that signal direct CP violation in the bottom sector are
suggested. They need data on events which consist of a bottom
hadron decay into an exclusive semileptonic channel (where is
a hadron), and the other bottom hadron decay into a multi-body final state that
manifests as a jet in the opposite hemisphere.Comment: 10 pages, Latex, no figures, expanded versio
Simulator evaluation of separation of display parameters in path-following tasks
A five degree of freedom, fixed base simulation changing the location of the displays for bank angle, pitch angle, heading angle, and the vertical and lateral displacement from an instrument landing system path was studied. It is shown that the accuracy of the lateral path following and the pilot aircraft system dynamic characteristics deteriorate when bank angle is displayed separated from the other attitudes. It is found that best results are obtained when bank, heading, and pitch angles are displayed together and vertical and lateral displacements are displayed at another location in the display
Dielectric function, screening, and plasmons in 2D graphene
The dynamical dielectric function of two dimensional graphene at arbitrary
wave vector and frequency , , is calculated in
the self-consistent field approximation. The results are used to find the
dispersion of the plasmon mode and the electrostatic screening of the Coulomb
interaction in 2D graphene layer within the random phase approximation. At long
wavelengths () the plasmon dispersion shows the local classical
behavior , but the density dependence of the
plasma frequency () is different from the usual 2D
electron system (). The wave vector dependent plasmon
dispersion and the static screening function show very different behavior than
the usual 2D case.Comment: 6 pages, 3 figure
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