Plasma interactions with mixed-material surfaces are being analyzed using advanced modeling of timedependent surface evolution/erosion. Simulations use the REDEP/WBC erosion/redeposition code package coupled to the HEIGHTS package ITMC-DYN mixed-material formation/response code, with plasma parameter input from codes and data. We report here on analysis for a DIII-D Mo/C containing tokamak dive...

This paper presents a numerical investigation and statistical analysis of laser bending of Titanium sheets. The aim of the present simulation is to identify the response through response surface methodology related to bending angle and characterize the effects of input parameters: laser power, spot diameter, scanning speed and plate thickness. The numerical simulations are carried out based on ...

An incrementally coupled electrical – thermal – mechanical model is developed to simulate small scale resistance spot welding (SSRSW) using the finite element method. This numerical model is then employed to study the differences between SSRSW and ‘large scale’ resistance spot welding (LSRSW). The variations in contact area, current distribution, and temperature profile at the workpiece/workpie...

How is the blind spot filled in? The natural blind spot is a retinal region devoid of photoreceptors, where the head of the optic nerve joins the retina (Figure 1A). Close your left eye and extend your right arm straight in front of you. Spread your fingers wide, palm down, and gaze at your thumbnail. Now wiggle your little finger. It will fall on your blind spot and you will be unable to see i...

Figures: Figure 1: Computational results for the Y-X potential energy profile at Z=67µm for the red-detuned example (bright spot) and the Y-X profile at Z=100µm for the blue-detuned example (dark spot). The corresponding Y-Z profiles of the trapping potential energies for both examples are also shown. These results were calculated for a 780nm laser incident on a 25µm diameter pinhole. Adapted f...

Based on a combined analytical and numerical modelling, a high-quality probe-forming system is proposed and developed. The Matrizant method is applied to minimize the beam spot size for a fixed beam current. For quadrupoles consisting of four metallic rods, the electric field inside of the quadruplet is computed using an accurate version of the boundary element method. The influence of the rod ...

We develop a simple model for a feed horn with a uniformly excited circular aperture at the focus of an offset paraboloidal reflector antenna and compare it with reflector antenna analyses using combinations of circular waveguide TE1n modes. The model demonstrates the deep dip that can occur at the spot-beam center for certain feed diameters and it is used in a design procedure that relates the...

The name Pethia melanomaculata (Deraniyagala) is available for the Sri Lankan fish previously referred to P. ticto, being distinguished from its Indian congeners by the combination of the following characters; having ½4/1/3½ scales in transverse line on body; body depth 32.4-41.5% of standard length (SL); head length (HL) 26.1-29.2% of SL; snout length 25.3-35.6% of HL; eye diameter 24.4-31.9% ...

Spin structures of nanoscale magnetic dots are the subject of increasing scientific effort, as the confinement of spins imposed by the geometrical restrictions makes these structures comparable to some internal characteristic length scales of the magnet. For a vortex (a ferromagnetic dot with a curling magnetic structure), a spot of perpendicular magnetization has been theoretically predicted t...