631 research outputs found
Cell Proliferation after Flap Surgery, Root Conditioning and Fibronectin Application
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141171/1/jper0661.pd
OPTIMIZATION OF METHODS OF SURGICAL TREATMENT OF CHRONIC LARYNGITIS, LARYNX PRE-MALIGNANT CONDITIONS
The aim of the research was to optimize the existing methods of surgical treatment of chronic laryngitis, obligate and facultative pre-malignant conditions of the larynx. Surgical treatment of patients with chronic laryngitis, obligate and facultative pre-malignant conditions of the larynx treated in the department of otolaryngology of Municipal Clinical Hospital N 1 of Novokuznetsk and in the department of otolaryngology of Regional Clinical Hospital of War Veterans of Kemerovo during 2009-2012 was conducted. Patients of thefirstgroup had endolaryngeal surgery with direct microlaryngoscopy using surgical microscope and microsurgical tools, patients of the second groups - with indirect laryngoscopy. Assessment of the results of surgical treatment was carried out on the basis of the re-examination of patients in one year (surveys, examination and fibrolaryngoscopy). It was established that use of direct microlaryngoscopy with surgical microscope and microsurgical tools with staining of changed parts of larynx mucous membrane allowed to achieve better visualization when conducting surgical treatment and as a result to reduce the percentage of patients with the development cancerous process in the larynx significantly. Comparison of treatment outcomes in two groups with and without use of microsurgical technique confirms the reliability of this conclusion
Instanton approach to the Langevin motion of a particle in a random potential
We develop an instanton approach to the non-equilibrium dynamics in
one-dimensional random environments. The long time behavior is controlled by
rare fluctuations of the disorder potential and, accordingly, by the tail of
the distribution function for the time a particle needs to propagate along the
system (the delay time). The proposed method allows us to find the tail of the
delay time distribution function and delay time moments, providing thus an
exact description of the long-time dynamics. We analyze arbitrary environments
covering different types of glassy dynamics: dynamics in a short-range random
field, creep, and Sinai's motion.Comment: 4 pages, 1 figur
Hall Effect in a Quasi-One-Dimensional System
We consider the Hall effect in a system of weakly coupled one-dimensional
chains with Luttinger interaction within each chain. We construct a
perturbation theory in the inter-chain hopping term and find that there is a
power law dependence of the Hall conductivity on the magnetic field with an
exponent depending on the interaction constant. We show that this perturbation
theory becomes valid if the magnetic field is sufficiently large.Comment: 20 page
Hall effect in quasi one-dimensional organic conductors
We study the Hall effect in a system of weakly coupled Luttinger Liquid
chains, using a Memory function approach to compute the Hall constant in the
presence of umklapp scattering along the chains. In this approximation, the
Hall constant decomposes into two terms: a high-frequency term and a Memory
function term. For the case of zero umklapp scattering, where the Memory
function vanishes, the Hall constant is simply the band value, in agreement
with former results in a similar model with no dissipation along the chains.
With umklapp scattering along the chains, we find a power-law temperature
dependance of the Hall constant. We discuss the applications to quasi 1D
organic conductors at high temperatures.Comment: Proceedings of the ISCOM conference "Sixth International Symposium on
Crystalline Organic Metals, Superconductors, and Ferromagnets", Key West,
Florida, USA (Sept. 2005), to be plublished in the Journal of Low Temperature
Physic
Thermal transport in granular metals
We study the electron thermal transport in granular metals at large tunnel
conductance between the grains, and not too low a temperature , where is the mean energy level spacing for a single grain.
Taking into account the electron-electron interaction effects we calculate the
thermal conductivity and show that the Wiedemann-Franz law is violated for
granular metals. We find that interaction effects suppress the thermal
conductivity less than the electrical conductivity.Comment: Replaced with published versio
Effect of Citric Acid and Various Concentrations of Fibronectin on Healing Following Periodontal Flap Surgery in Dogs
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142283/1/jper0667.pd
Thermodynamics of the superfluid dilute Bose gas with disorder
We generalize the Beliaev-Popov diagrammatic technique for the problem of
interacting dilute Bose gas with weak disorder. Averaging over disorder is
implemented by the replica method. Low energy asymptotic form of the Green
function confirms that the low energy excitations of the superfluid dirty Boson
system are sound waves with velocity renormalized by the disorder and
additional dissipation due to the impurity scattering. We find the
thermodynamic potential and the superfluid density at any temperature below the
superfluid transition temperature and derive the phase diagram in temperature
vs. disorder plane.Comment: 4 page
Order via Nonlinearity in Randomly Confined Bose Gases
A Hartree-Fock mean-field theory of a weakly interacting Bose-gas in a
quenched white noise disorder potential is presented. A direct continuous
transition from the normal gas to a localized Bose-glass phase is found which
has localized short-lived excitations with a gapless density of states and
vanishing superfluid density. The critical temperature of this transition is as
for an ideal gas undergoing Bose-Einstein condensation. Increasing the
particle-number density a first-order transition from the localized state to a
superfluid phase perturbed by disorder is found. At intermediate number
densities both phases can coexist.Comment: Author Information under
http://www.theo-phys.uni-essen.de/tp/ags/pelster_dir/. International Journal
of Bifurcation and Chaos (in press
Superconducting-coil--resistor circuit with electric field quadratic in the current
It is shown for the first time that the observed [Phys. Lett. A 162 (1992)
105] potential difference Phi_t between the resistor and the screen surrounding
the circuit is caused by polarization of the resistor because of the kinetic
energy of the electrons of the superconducting coil. The proportionality of
Phi_t to the square of the current and to the length of the superconducting
wire is explained. It is pointed out that measuring Phi_t makes it possible to
determine the Fermi quasimomentum of the electrons of a metal resistor.Comment: 2 pages, 1 figur
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