X-ray-absorption measurements of solid and liquid CuBr in the T5295– 793 K range of temperature are presented. Accurate short-range structural parameters are extracted using simultaneous Cu and Br K-edge extended x-ray-absorption fine-structure ~EXAFS! refinement in the framework of the multiple-scattering GNXAS method for data analysis. In solid CuBr we find an increasing asymmetry of the firs...

Consider a hexagonal LC lattice of inductors and capacitors. For the lattice diagram shown in Fig. 1, we assume that each edge consists of an inductor that connects two nodes, and that there is a capacitor connecting each node to a ground plane that is not pictured. This medium is a twodimensional generalization of the standard transmission line structure. We take the inductances L and capacita...

We present an algorithm for fast computation of diffraction paths for geometric-acoustics in complex environments based on the UTD formulation. Our method extends ray-frustum tracing to efficiently compute paths in the shadow region caused by long diffracting edges. Our approach can handle general scenes with moving sources, receivers, and dynamic objects. We evaluate the accuracy through compa...

Variation in microstructural features of 2024 aluminum alloy plastically deformed by equal channel angular pressing (ECAP) at room temperature, was investigated by X-Ray diffraction in this work. These include dislocation density dislocation characteristic and the cell size of crystalline domains. Dislocations contrast factor was calculated using elastic constants of the alloy such as C 11, C 2...

A novel method is presented for the identification of the absolute crystallographic structure in multi-domain polar materials such as ferroelectric KTiOPO4. Resonant (or 'anomalous') X-ray diffraction spectra collected across the absorption K edge of Ti (4.966 keV) on a single Bragg reflection demonstrate a huge intensity ratio above and below the edge, providing a polar domain contrast of ∼270...

It is shown that metal gratings can be used to improve the cross polarization of circularly-polarized aperture-coupled microstrip antennas. The metal gratings reduce edge diffraction from the finitesize grounded dielectric slab on which the antennas are printed. The edge diffraction is due to surface waves that can propagate in the grounded dielectric slab. The design of the metal grating is ba...

This paper proposed an edge detection scheme which is deduced from Fresnel diffraction. Analysis in this paper shows that Fresnel convolution kernel function performs well on edge enhancement when images are transformed into complex functions. Due to its mathematical complexity, the method is simplified into a linear convolution filter. The new edge detector is designed based on the simplified ...