We consider a viscoelastic solid in Kelvin-Voigt rheology exhibiting
also plasticity
with hardening and coupled with heat-transfer
through dissipative heat production by viscoplastic effects
and through thermal expansion and corresponding adiabatic effects.
Numerical discretization of the thermodynamically consistent model
is proposed by implicit time discretization, suitable regularization,
and finite elements in space. Fine a-priori estimates are derived,
and convergence is proved by careful...
Wireless LAN using IEEE 802.11 networks are now widely deployed at home by residential users or in hot spots by telecommunication operators. A hot spot is a place where a set of access points (APs) are located nearby each other and can serve many users. Since perturbations can degrade the quality of the signal, a careful channel assignment to each AP has to be done. Channel assignment of APs at hot spots, and more generally setup configuration and management, is still often done manually. In this...
Wireless LAN using IEEE 802.11 networks are now widely deployed at
home by residential users or in hot spots by telecommunication
operators. A hot spot is a place where a set of access points (APs)
are located nearby each other and can serve many users. Since
perturbations can degrade the quality of the signal, a careful
channel assignment to each AP has to be done. Channel assignment of
APs at hot spots, and more generally setup configuration and
management, is still often done manually. In this...
We present a method for solving the equations of neutron transport with discretized energetic dependence and angular dependence approximated by the diffusion theory. We are interested in the stationary solution that characterizes neutron fluxes within the nuclear reactor core in an equilibrium state. We work with the VVER-1000 type core with hexagonal fuel assembly lattice and use a nodal method for numerical solution. The method effectively combines a whole-core coarse mesh calculation with a more...
Computerized tomograhphy is a technique for computation and visualization of density (i.e. X- or -ray absorption coefficients) distribution over a cross-sectional anatomic plane from a set of projections. Three-dimensional reconstruction may be obtained by using a system of parallel planes.
For the reconstruction of the transverse section it is necessary to choose an appropriate method taking into account the geometry of the data collection, the noise in projection data, the amount of data, the...
In this paper we outline the hyperbolic system of governing equations describing one-dimensional blood flow in arterial networks. This system is numerically discretised using a discontinuous Galerkin formulation with a spectral/ element spatial approximation. We apply the numerical model to arterial networks in the placenta. Starting with a single placenta we investigate the velocity waveform in the umbilical artery and its relationship with the distal bifurcation geometry and the terminal resistance....