rectangular waveguide (wr) is one of the earliest types of transmission lines. rectangular waveguide can be produced by hot extrusion process. in this paper, the hot extrusion process of cuzn5 rectangular waveguide was investigated by finite element method (fem). in addition, genetic algorithm method (ga) was used to optimize the die geometry and process conditions to achieve the lowest magnitu...

The detection, location, and sizing of a fatigue crack emanating from a fastener hole in an aluminum plate is investigated. Two linear arrays of surface mounted piezoelectric disk transducers send and receive ultrasonic guided waves that are transmitted, reflected, and scattered by both the joint geometry and the fatigue crack. A tomography algorithm is used to detect and locate the crack. Ampl...

Over the past six years, a detailed framework has been constructed to unravel the quantum nature of the Riemannian geometry of physical space. A review of these developments is presented at a level which should be accessible to graduate students in physics. As an illustrative application, I indicate how some of the detailed features of the micro-structure of geometry can be tested using black h...

In this research, the effects of the rotational speed, feed rate, tool material and lubricants on the tool life and the hole quality are studied in the frictional drilling of the titanium sheets. The friction drilling tests are performed on a CNC milling machine. Furthermore, 5 specimens are selected and their metallurgical structures are studied. The results show thatamong the input parameters...

This work mainly focuses to unveil the optical features of a black hole. For this objective, we utilize metric-affine hole geometry, including dilation, spin, and shear charge. The Lagrangian coefficients f1 d1 are main parameters that differentiate solutions by d1=±8f1, where f1<0. Based on these parameters, carry out in two cases, i.e., d1=8f1,&d1=−8f1. We forecast detailed impact charges pro...

This project presents a system to generate realistic cloth simulations by acquiring the geometry and a surface parameterization of real cloth from a captured video stream. Stereo processing with a technique for disparity map hole filling and smoothing is used to recover the geometry of the cloth. Image feature matching using SIFT features is combined with a surface interpolation method to deter...

We discuss some general features of black holes of five-dimensional supergravity, such as the first law of black hole mechanics. We also discuss some special features of rotating supersymmetric black holes. In particular, we show that the horizon is a non-singular, and non-rotating, null hypersurface whose intersection with a Cauchy surface is a squashed 3-sphere. We find the Killing spinors of...

We present a complete quantum mechanical description of a flat FRW universe with equation of state p = ρ. We find a detailed correspondence with our heuristic picture of such a universe as a dense black hole fluid. Features of the geometry are derived from purely quantum input.

Abstract The light passing near the black hole (BH) is deflected due to gravitational effect, producing BH shadow, a dark inner region that often surrounded by bright ring, whose optical appearance comes directly from BH’s mass and its angular momentum. We mainly study shadow observable features of non-commutative (NC) charged Kiselev BH, various profiles accretions. To obtain profile, we choos...