114 research outputs found
Density of states for Bose-Einstein condensation in harmonic oscillator potentials
We discuss how it is possible to obtain a reliable approximation for the
density of states for a system of particles in an anisotropic harmonic
oscillator potential. A direct application of the result to study Bose-Einstein
condensation of atomic gases in a potential trap can be given. In contrast to a
previous study, our method involves only analytic calculations.Comment: 7 pages, LaTeX2e, no figure
Singularities of Green functions of the products of the Laplace type operators
The structure of diagonal singularities of Green functions of partial
differential operators of even order acting on smooth sections of a vector
bundle over a Riemannian man ifold is studied. A special class of operators
formed by the products of second-order operators of Laplace type defined with
the help of a unique Riemannian metric and a unique bundle connection but with
different potential terms is investigated. Explicit simple formulas for
singularities of Green functions of such operators in terms of the usual heat
kernel coefficients are obtained.Comment: 12 Pages, LaTeX, 30 KB, No Figures, submitted to Physics Letters B,
Discussion of the Huygence principle is remove
Relation between chiral symmetry breaking and confinement in YM-theories
Spectral sums of the Dirac-Wilson operator and their relation to the Polyakov
loop are thoroughly investigated. The approach by Gattringer is generalized to
mode sums which reconstruct the Polyakov loop locally. This opens the
possibility to study the mode sum approximation to the Polyakov loop
correlator. The approach is re-derived for the ab initio continuum formulation
of Yang-Mills theories, and the convergence of the mode sum is studied in
detail. The mode sums are then explicitly calculated for the Schwinger model
and SU(2) gauge theory in a homogeneous background field. Using SU(2) lattice
gauge theory, the IR dominated mode sums are considered and the mode sum
approximation to the static quark anti-quark potential is obtained numerically.
We find a good agreement between the mode sum approximation and the static
potential at large distances for the confinement and the high temperature
plasma phase.Comment: 17 pages, 10 figures, typos corrected, references added, final
version to appear in PR
A Local Effective Action for Photon-Gravity Interactions
Quantum phenomena such as vacuum polarisation in curved spacetime induce
interactions between photons and gravity with quite striking consequences,
including the violation of the strong equivalence principle and the apparent
prediction of `superluminal' photon propagation. These quantum interactions can
be encoded in an effective action. In this paper, we extend previous results on
the effective action for QED in curved spacetime due to Barvinsky, Vilkovisky
and others and present a new, local effective action valid to all orders in a
derivative expansion, as required for a full analysis of the quantum theory of
high-frequency photon propagation in gravitational fields.Comment: 22 pages, 9 figures, harvmac Te
Estimates in Beurling--Helson type theorems. Multidimensional case
We consider the spaces of functions on the
-dimensional torus such that the sequence of the Fourier
coefficients belongs to
. The norm on is defined by
. We study the rate of
growth of the norms as
for -smooth real
functions on (the one-dimensional case was investigated
by the author earlier). The lower estimates that we obtain have direct
analogues for the spaces
Practical guidance on insulin injection practice in diabetes self-management in the Indian setting: an expert consensus statement
This consensus statement aimed to provide a simple and easily implementable practical educational guide- line for healthcare professionals (HCPs) and patients regarding insulin injection practice in diabetes self- management in the Indian setting.
A group of experts analysed published data from guidelines, clinical trials and real world evidence to reach consensus recommendations on optimal insulin injection practices in terms of a) the injection sites (preparation of site of injection, choosing the injec- tion site, site rotation), b) choice of device and storage of insulins, and c) safety precautions, sharp disposal practice and complications.
Findings from Global and Indian arm of 2014-2015 ITQ Study were considered to emphasize a need for improved practice by HCPs covering all the vital topics essential to proper injection habits.
The consensus statement provides a simple and easily implementable practical educational guideline for HCPs and patients to optimize insulin injection practices in accordance with recent advances in device manufac- turing, newer research findings, and updated interna- tional guidelines as well as widespread concerns about neglected safety precautions such as single-patient use of pens and appropriate sharp disposal practices.This consensus statement aimed to provide a simple and easily implementable practical educational guide- line for healthcare professionals (HCPs) and patients regarding insulin injection practice in diabetes self- management in the Indian setting.
A group of experts analysed published data from guidelines, clinical trials and real world evidence to reach consensus recommendations on optimal insulin injection practices in terms of a) the injection sites (preparation of site of injection, choosing the injec- tion site, site rotation), b) choice of device and storage of insulins, and c) safety precautions, sharp disposal practice and complications.
Findings from Global and Indian arm of 2014-2015 ITQ Study were considered to emphasize a need for improved practice by HCPs covering all the vital topics essential to proper injection habits.
The consensus statement provides a simple and easily implementable practical educational guideline for HCPs and patients to optimize insulin injection practices in accordance with recent advances in device manufac- turing, newer research findings, and updated interna- tional guidelines as well as widespread concerns about neglected safety precautions such as single-patient use of pens and appropriate sharp disposal practices
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