We use the continued fraction method to determine eigenfrequencies associated with a scalar field around Kerr-like black hole. The metric considered in this article is subclass of general parametrization axisymmetric holes proposed by Konoplya, Rezzolla and Zhidenko. In addition its mass $M$ specific angular momentum $a$, hole depends on third parameter $\eta$, called deformation parameter. inv...

the drilling is well known as one of the most common hole making processes in the industry.due to close tolerance requirement for drilled holes in the most of work pieces, onlinecontrolling of the diameter of drilled holes seems to be necessary. in the current work, an onlinedimensional controlling system was developed for drilling process. doing this, drilling processwas executed in different ...

For the urgent need of gas management in high and coal herniated mines, liquid CO2 fracturing is used to increase permeability promote pumping treatment low seams. In this paper, we construct deformation damage model, diffusion seepage seam change model; simulate solve plastic zone pressure after with COMSOL Multiphysics software; set 4 different hole spacing groups 2 m, 3 5 m layout methods si...

We investigate the shadow cast by a sort of new regular black holes which are characterized an asymptotically Minkowski core and Sub-Planckian curvature. Firstly, we extend metric with spherical symmetry to one rotating Kerr-like derive null geodesics circular orbit near horizon hole, then plot different values deviation parameter. It is found that size shrinks increase parameter, while shape b...