The Haft Saravan area is located in 90 km SE Arak in the central Iran. This area is a part of Malyer-Isfahan metallogenic belt. The article's objective is determining the most suitable method for identifying mineralized zones using original singularity and weighted singularity methods in three-dimensional space. In weighted singularity method, mineralized zones have a greater volume relative to...

We study a simple system of two hyperbolic semi-linear equations, inspired by the Einstein equations. The system, which was introduced in [1], is a model for singularity formation inside black holes. We show for a particular case of the equations that the system demonstrates a finite time blowup. The singularity that is formed is a null singularity. Then we show that in this particular case the...

It is well known that singular configurations are an inherent nature of mechanical systems and have important influences on their properties. Therefore, these special configurations of the system are usually avoided in design and application of mechanisms. For simple 2-DOF and 3-DOF planar manipulators, the singularity loci have been obtained in [1, 2]. For spherical 3DOF parallel manipulators ...

This paper presents a method for tracking multiple objects using multiple cameras that integrates spatial position, shape and color information to track object blobs. Given three known points on the ground, camera calibration is computed by solving a set of quaternionbased nonlinear functions rather than solving approximated linear functions. By using a quaternion-based method, we can avoid the...

Using an axiomatic formulation, we devise a diiusion equation on movies that preserves the 3D structure of objects, an interesting property for depth recovery tasks. Since this equation presents a strong singularity and is not handled by the classical theory of viscosity solutions, we study the existence and unicity of weak solutions, and point out some properties, including a variational inter...

This paper shows the coordinates influence on singularity of a three degree-of-freedom structure, namely, three-Universal-Prismatic-Spherical (3-UPS) parallel manipulator. Rotational coordinates, which are chosen to define the orientation of the platform, affect the singularity of the manipulator. Euler parameters, which don't have any inherent geometrical singularity are utilized, however they...

A class of simple statistical mechanical models for DNA melting, first proposed by Poland and Scheraga, have been demonstrated to exhibit first or second order thermodynamic singularity, notwithstanding the intrinsic one-dimensional nature of the problem. In the present paper we show that the inclusion of twist elastic energy in the Poland-Scheraga models either leads to suppression of the ther...