Post-mineralization activities may cause difficulties in the process of ore modeling in porphyry deposits. Sungun, NW Iran, is one of the porphyry copper deposits, in which dyke intrusions have made ore modeling more complicated than expected. Among different kinds of dykes, two types were chosen and the consequent geostatistical analyses were applied on. In this study, simple directional vario...

Relativistically broadened spectral features have now been seen in the X-ray spectra of many active galactic nuclei (AGN) and Galactic Black Hole Binaries (GBHBs). Investigations of these features allow us to probe the physics of the innermost accretion flow, the geometry of the still-mysterious hard X-ray source, and the spacetime metric of the black hole itself. We conducted a Suzaku Key Proj...

This thesis presents a study of the effect of controllable riveting parameters, mainly squeeze force, rivet length, rivet diameter tolerance, hole countersunk depth and hole diameter tolerance, on the quality of formed rivet. The quality of a formed rivet is determined by the geometry of its head formation and the extent to which the hole is filled. The study determines maximum allowable tolera...

We study event horizons of non-axisymmetric black holes and show how features found in axisymmetric studies of colliding black holes and of toroidal black holes are non-generic and how new features emerge. Most of the details of black hole formation and black hole merger are known only in the axisymmetric case, in which numerical evolution has successfully produced dynamical space-times. The wo...

Geometry of eccentrically braced frames (EBFs) in some cases causes the connection of link beam to the column. The details of such conditions should be studied carefully due to the full plastic rotation in the link beam. In this research, the behavior of link-to-column connection is modeled and the failure modes are considered. Based on the previous researches shear link can exhibit better beha...

Abstract The phase transition and thermodynamic geometry of a 4-dimensional AdS topological charged black hole in de Rham, Gabadadze Tolley (dRGT) massive gravity have been studied. After introducing normalized scalar curvature, it is speculated that its value related to the interaction between underlying molecules if exist. We show there does exist crucial parameter given terms topology, charg...

The overset, or chimera, grid methodology utilizes a set of overlapping grids to discretize the solution domain. The critical first step in the overset process is the hole cutting with many different approaches currently in use. The present paper investigates an approach that seeks to maximize automation and minimize user inputs. The method uses the surfaces of the grids that define geometry fo...

In this paper, to recover the missing geometry details on 3D surfaces, we develop a novel geometry detail recovery algorithm for 3D surfaces based on Empirical Mode Decomposition (EMD). EMD is a powerful tool for processing non-linear and non-stationary signals and has been successfully used in 3D surface analysis and processing. Given a signal defined on 3D surface, EMD could represent the sig...