314,635 research outputs found
A Numerical Study of Improved Quark Actions on Anisotropic Lattices
Tadpole improved Wilson quark actions with clover terms on anisotropic
lattices are studied numerically.
Using asymmetric lattice volumes, the pseudo-scalar meson dispersion
relations are measured for 8 lowest lattice momentum modes with quark mass
values ranging from the strange to the charm quark with various values of the
gauge coupling and 3 different values of the bare speed of light
parameter . These results can be utilized to extrapolate or interpolate to
obtain the optimal value for the bare speed of light parameter
at a given gauge coupling for all bare quark mass values . In particular,
the optimal values of at the physical strange and charm quark mass are
given for various gauge couplings.
The lattice action with these optimized parameters can then be used to study
physical properties of hadrons involving either light or heavy quarks.Comment: 22 pages, 7 figures, 2 tables. Analysis greatly modified compared
with previous versio
Celebrity Endorsement in Women’s Magazines: Evidence of a Corporate Social Responsibility Concern
Flow Induced by the Impulsive Motion of an Infinite Flat Plate in a Dusty Gas
Flow Induced by the Impulsive Motion of an Immite Flat Plate in a Dusty Gas. The problem of
flow induced by an infinite flat plate suddenly set into motion parallel to its own plane in an incompressible
dusty gas is of considerable physical interest in its own right as well as because of its close relation to the
non-linear, steady (constant-pressure) laminar boundary layer. Its solution provides complete and exact
information about modifications of the boundary layer growth and skin friction due to particle-fluid
interaction. Moreover, it provides a basis for judging the accuracy of approximations which have been
employed in more complex problems of viscous fluid-particle motion. The uncoupled thermal Rayleigh
problem for small relative temperature differences is directly inferred and this answers questions about the
modifications of the surface heat transfer rate and about the possibility of similarity with the velocity
boundary layer. Similarity is possible when, in addition to a Prandtl number of unity, the streamwise
relaxation processes are also similar
Overall properties of the Gaia DR1 reference frame
We compare quasar positions of the auxiliary quasar solution with ICRF2
sources using different samples and evaluate the influence on the {\it Gaia}
DR1 reference frame owing to the Galactic aberration effect over the
J2000.0-J20015.0 period. Then we estimate the global rotation between TGAS with
{\it Tycho}-2 proper motion systems to investigate the property of the {\it
Gaia} DR1 reference frame. Finally, the Galactic kinematics analysis using the
K-M giant proper motions is performed to understand the property of {\it Gaia}
DR1 reference frame. The positional comparison between the auxiliary quasar
solution and ICRF2 shows negligible orientation and validates the declination
bias of \mas~in {\it Gaia} quasar positions with respect to ICRF2.
Galactic aberration effect is thought to cause an offset \mas~of
the axis direction of {\it Gaia} DR1 reference frame. The global rotation
between TGAS and {\it Tycho}-2 proper motion systems, obtained by different
samples, shows a much smaller value than the claimed value \masyr. For
the Galactic kinematics analysis of the TGAS K-M giants, we find possible
non-zero Galactic rotation components beyond the classical Oort constants: the
rigid part \masyr~and the differential part
\masyr~around the axis of Galactic
coordinates, which indicates possible residual rotation in {\it Gaia} DR1
reference frame or problems in the current Galactic kinematical model.Comment: 6 pages, 1 figure. Accepted for publication in A&
Method and device for the detection of phenol and related compounds
A method is described which permits the selective oxidation and potentiometric detection of phenol and related compounds in an electrochemical cell. An anode coated with a gel immobilized oxidative enzyme and a cathode are each placed in an electrolyte solution. The potential of the cell is measured by a potentiometer connected to the electrodes
-adic exponential sums of polynomials in one variable
The -adic exponential sum of a polynomial in one variable is studied. An
explicit arithmetic polygon in terms of the highest two exponents of the
polynomial is proved to be a lower bound of the Newton polygon of the
-function of the T-adic exponential sum. This bound gives lower bounds for
the Newton polygon of the -function of exponential sums of -power order
Penetration depth time history measurement method
A new method for measuring the depth time history of rigid body penetration into brittle materials under a deceleration of ~10^5 g. The method includes: sabot-projectile, sabot-projectile separation and penetration depth detection systems. Relatively small intrinsic time error (3%) and depth error (0.3–0.7 mm) results. Penetration depth time history in a series of 4140 steel projectile penetrations into a mortar are measured at velocities of 100 to 500 m/sec with sufficient accuracy such that differentiation with respect to time yields stopping force, via Newton's second law
Schiff Screening of Relativistic Nucleon Electric-Dipole Moments by Electrons
We show, at leading-order in the multipole expansion of the electron-nucleus
interaction, that nucleon electric-dipole moments are completely shielded by
electrons so that they contribute nothing to atomic electric-dipole moments,
even when relativity in the nucleus is taken into account. It is well known
that relativistic electron motion, by contrast, leads to dipole moments that
are not screened; we discuss the reasons for the difference.Comment: 4 pages, typeset by REVTeX, submitted to PR
On radiative transfer in the low Reynolds number blunt body stagnation region at hypersonic speeds. Part 1 - Emission dominated case
Effect of radiative heat transfer in low Reynolds number hypersonic flow about blunt bod
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