The second-order partial differential wave Equation (Cauchy’s first equation of motion), derived from Newton’s force equilibrium, describes a standing field consisting two waves propagating in opposite directions, and is, therefore, “two-way equation”. Due to the second order differentials analytical solutions only exist few cases. “binomial factorization” linear two-way operator into first-ord...

This study demonstrates computer simulation of human brain treated with interstitial microwave hyperthermia. A thin coaxial-slot antenna emitting microwaves is the heat source. For simplification, a 2D axisymmetric model is considered. The wave equation for TM wave case and the Pennes bioheat transfer equation for transient-state have been solved with the finite element method. The impact of th...

An ultrathin absorptive/transmissive radome with dual passbands is presented in this paper. The total thickness of radome is only 5mm. The dual passbands are located at around 1.05GHz and 2.2GHz, respectively. The absorbing band ranges from 6.28GHz to 15.04GHz for TE wave incidence and from 6.3GHz to 15.16GHz for TM wave incidence. Due to the miniaturized elements, the grating lobes are shifted...

NASA/TM—2013-217850 1 ∆t∗ nondimensional time step, ∆t/(L/V0) kinetic energy dissipation rate 1 kinetic energy dissipation rate computed from deviatoric strain rate 3 kinetic energy dissipation rate computed from pressure dilatation κ angular wave number μ kinematic viscosity ν spectroscopic wave number ωi vorticity vector Ω volume ρ density σ filter damping coefficient τij stress tensor ζ enst...

In this paper, scattering of a plane and monochromatic electromagnetic wave from a nano-wire is simulated using surface integral equations. First, integral equationsgoverning unknown fields on the surface is obtained based on Stratton-Cho surface integral equations. Then, the interaction of the wave with a non-plasmonic as well as a palsmonic nano-wire is considered. It is shown that in scatter...

Zn0.97TM0.03O (TM = Co, Fe) thin films were deposited onto glass substrates by the sol–gel method and the effects of transition metals substitution on structural and optical properties of ZnO films were investigated. The X-ray diffraction patterns revealed that the films have wurtzite structure. Optical transmittance of the films was recorded in the range of 200 -800 nm wave length and the band...

The propagation of transverse magnetic (TM) and electric (TE) electromagnetic waves in a regular ideal waveguide arbitrary cross section is considered. It assumed that the permittivity permeability magnetodielectric filling are functions depend on coordinate time. Analytical expressions for components vectors TM- TE-fields obtained from system Maxwell equations. They expressed terms longitudina...

We study a two-dimensional single band Hubbard Hamiltonian with antisymmetric spin-orbit coupling. argue that this is the minimal model to understand electronic properties of locally non-centrosymmetric transition-metal (TM) oxides such as Sr$_2$IrO$_4$. Based on exact diagonalizations small clusters and random phase approximation, we investigate correlation effects charge magnetic order functi...

This paper investigates the effect of long and changing propagation delays on the performance of TCP file transfers. Tests are performed with machines that emulate communication from a low/medium-earth satellite to Earth by way of a geosynchronous satellite. As a result of these tests, we find that TCP is fairly robust to varying delays given a high enough TCP timer granularity. However, perfor...