Introduction: Optical coherence tomography is a technology that allows obtaining high resolution images of tissues in vivo, enabling the measurement of ocular structures, including the retinal nerve fiber layer and macular thickness. As a noninvasive test it’s particularly useful in children, but its applicability is limited by the existence of normative values for adults only. Purpose: To esta...

In this paper, nonlinear analytical solution of pressurized thick cylindrical shells with variable thickness made of hyperelastic materials is presented. The governing equilibrium equations for the cylindrical shell with variable thickness under non-uniform internal pressure are derived based on first-order shear deformation theory (FSDT). The shell is assumed to be made of isotropic and homoge...

The laterally graded multilayer collimator is a vital part of high-precision diffractometer. It applied as condensing reflectors to convert divergent X-rays from laboratory X-ray sources into parallel beam. thickness the film varies with angle incidence guarantee every position on mirror satisfies Bragg reflection. In principle, accuracy parameters sputtering conditions essential for achieving ...

INTRODUCTION Optical coherence tomography is a technology that allows obtaining high resolution images of tissues in vivo, enabling the measurement of ocular structures, including the retinal nerve fiber layer and macular thickness. As a noninvasive test it's particularly useful in children, but its applicability is limited by the existence of normative values for adults only. PURPOSE To esta...