Sandstorm has an effect on the electric field characteristics of outdoor insulator, and may result in flashover. The analysis of the electric field characteristic of insulator under sandstorm condition is very important. The electrostatic field finite element method (FEM) is used to calculate the electric field distribution along long rod insulator under sandstorm condition with FEM software. T...

A novel technique based on Schwinger’s proper time method is applied to the Casimir problem of the M.I.T. bag model. Calculations of the regularized vacuum energies of massless scalar, Dirac spinor, and vector fields confined to a static and spherical cavity are presented in a consistent manner. While our results agree with previous calculations based on asymptotic methods, the main advantage o...

Energy spectra of secondary cosmic rays are calculated for aircraft altitudes and a discrete set of solar modulation parameters and rigidity cut-off values covering all possible conditions. The calculations are based on the Monte Carlo code FLUKA and on the most recent information on the interstellar cosmic ray flux including a detailed model of solar modulation. Results are compared to a large...

On the calculation of the topographic wetness index: evaluation of different methods based on field observations R. Sørensen, U. Zinko, and J. Seibert Department of Environmental Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 75007 Uppsala, Sweden Department of Ecology and Environmental Science, Umeå University, Uminova Science Park, 90187 Umeå, Sweden Department of Phy...

The field-emission current from realistic metal surfaces is evaluated within the density-functional theory using the Landauer-Büttiker approach. The electronic density in the surface region and the potential barrier induced by the finite electric field are calculated self-consistently using a Green’s-function embedding scheme and the full-potential linearized-augmented plane-wave method. Applic...

We obtain accurate resonance energies for the Schrödinger equation with a central–field potential by means of a method based on a rational approximation to the logarithmic derivative of the wavefunction. We discuss the rate of convergence of our approach and compare present results with those obtained earlier by other authors. We show that present method is superior to the spherical–box approac...

We present a calculation of nuclei propagation with energies above 1018 eV in the intergalactic photon field. The calculation is based on a Monte Carlo approach for the nucleus-photon interaction as well as the intergalactic magnetic field. We then assume that the Ultra-High Energy Cosmic Rays (UHECR) are nuclei which are emitted from extra-galactic point sources. Four bumps are found in the en...

PURPOSE To develop a new shimming calculation method, which can calculate iron piece placements rapidly to make the magnetic field homogeneous at intended homogeneity and then to make the shimming working time short. MATERIALS AND METHODS The shimming calculation yields magnetic moment (MM) distribution, which is calculated by the truncated singular value decomposition (SVD) from the measured...