Voronezh State University

About: Voronezh State University is a education organization based out in Voronezh, Russia. It is known for research contribution in the topics: Silicon & Boundary value problem. The organization has 5166 authors who have published 6097 publications receiving 31680 citations. The organization is also known as: VSU & Voronezh University.

Evolution Equations in Thermoelasticity

Abstract: DERIVATION OF THE EQUATIONS WELL-POSEDNESS OF THE LINEARIZED SYSTEM AND GENERAL ASYMPTOTICS Linear Well-Posedness First Results on the Time-Asymptotic Behavior ASYMPTOTIC BEHAVIOR FOR LINEARIZED ONE-DIMENSIONAL MODELS Large Time Behavior Bounded Domains The Cauchy Problem The Semi-Axis Propagation of Singularities ASYMPTOTIC BEHAVIOR FOR LINEARIZED MULTI-DIMENSIONAL MODELS Large-Time Behavior Bounded Domains The Cauchy Problem Isotropic Media Cubic media Propagation of singularities LOCAL EXISTENCE Initial Boundary Value Problems The Cauchy Problem NONLINEAR ONE-DIMENSIONAL THERMOELASTICITY Bounded Domains The Cauchy Problem The Semi-Axis Stationary Forces Blow-up of Smooth Solutions for Large Data Weak Solutions NONLINEAR MULTI-DIMENSIONAL THERMOELASTICITY Bounded Domains The Cauchy Problem Blow-Up CONTACT PROBLEMS Fully Dynamical Contact Problems Quasi-Static Contact Problems Linear Quasi-Static Problems Quasi-Static Contact Smoothing Property RELATED RESULTS Exponential Decay in the Case of Damping Asymptotic Behavior of Solutions as 1/2x1/2 (R)* Numerical Analysis APPENDIX Existence Theory for Linear Equations Existence for Linear Evolution Systems Linear Hyperbolic Systems Linear Parabolic Equations Regularity for Linear Elliptic Systems and Inequalities

Presence of many stable nonhomogeneous states in an inertial car-following model

Abstract: We present a single lane car- following model of traffic flow which is inertial and free of collisions. It demonstrates observed features of traffic flow such as existence of three regimes: free, nonhomogeneous congested (NHC) or synchronized, and homogeneous congested (HC) or jammed flow; bistability of free and NHC flow states in a range of densities, hysteresis in transitions between these states; jumps in the density-flux plane in the NHC regime; gradual spatial transition from synchronized to free flow; long survival time of jams in the HC regime. The model predicts that in the NHC regime there exist many stable states with different wavelengths, and noise can cause transitions between them.

Trapping of neutral mercury atoms and prospects for optical lattice clocks.

Abstract: We report vapor-cell magneto-optical trapping of Hg isotopes on the {sup 1}S{sub 0}-{sup 3}P{sub 1} intercombination transition. Six abundant isotopes, including four bosons and two fermions, were trapped. Hg is the heaviest nonradioactive atom trapped so far, which enables sensitive atomic searches for ''new physics'' beyond the standard model. We propose an accurate optical lattice clock based on Hg and evaluate its systematic accuracy to be better than 10{sup -18}. Highly accurate and stable Hg-based clocks will provide a new avenue for the research of optical lattice clocks and the time variation of the fine-structure constant.

Ballistic conductance of magnetic Co and Ni nanowires with ultrasoft pseudopotentials

Abstract: The scattering-based approach for calculating the ballistic conductance of open quantum systems is generalized to deal with magnetic transition metals as described by ultrasoft pseudopotentials. As an application we present quantum-mechanical conductance calculations for monatomic Co and Ni nanowires with a magnetization reversal. We find that in both Co and Ni nanowires, at the Fermi energy, the conductance of $d$ electrons is blocked by a magnetization reversal, while the $s$ states (one per spin) are perfectly transmitted. $d$ electrons have a nonvanishing transmission in a small energy window below the Fermi level. Here, transmission is larger in Ni than in Co.

Electron Vortices in Photoionization by Circularly Polarized Attosecond Pulses

Abstract: Single ionization of He by two oppositely circularly polarized, time-delayed attosecond pulses is shown to produce photoelectron momentum distributions in the polarization plane having helical vortex structures sensitive to the time delay between the pulses, their relative phase, and their handedness Results are obtained by both ab initio numerical solution of the two-electron time-dependent Schrodinger equation and by a lowest-order perturbation theory analysis The energy, bandwidth, and temporal duration of attosecond pulses are ideal for observing these vortex patterns