A broadband polarization switch consisting of an active twisted nematic liquid crystal cell and two passive uniaxial compensation films is analysed. The conjugate gradient method was used for optimizing the device parameters. Simulation results indicate that the polarization switch exhibits a broad bandwidth and high contrast ratio. The manufacturing tolerances on cell gap, twist angle and comp...

Abstract A dynamic mixing model for a microfluidic platform that uses bending and twisting characteristic is proposed in this work. The action of on efficient the microchannel tested using Navier-Stokes equations. Micromixers being broadly applied micro total analysis systems (µTAS). Passive micromixers are largely preferred from their heftiness, serenity amalgamation cost effective. However ra...

The aim of the present study is to determine the feasibility of making a rectangular twist waveguide used to rotate electromagnetic waves. For this purpose, the process of fabricating an aluminum rectangular twist waveguide was simulated by making use of finite element method and Deform software. The optimum length and angle of the twist die for manufacturing a twist waveguide with inner cross ...

CFAR (Constant False Alarm Rate) detectors were designed and evaluated in non-homogeneous DVB-T (Digital Video Broadcasting-Terrestrial) passive radar scenarios. The CA-CFAR (Cell-Averaged CFAR) is the most widespread incoherent CFAR technique. CA-CFAR detector is optimal under the assumption of homogeneous interference, but CA-CFAR performance is degraded when this assumption is not fulfilled....

Actin filament rotation in skeletal muscle is studied by a mechanical model that simulates structure and tension. The four anchoring Z-filaments are twisted around and change the structure of the Z-lattice. The "small square" without twist represents the resting stage of muscle. Torque causes contraction by clockwise rotation (as seen from the Z-band), drilling into the A-band and transition of...

A cylindrical rubber fiber subject to a twist will also elongate: manifestation of Poynting’s effect in large strain elasticity. Here, we construct an analogous treatment for active actuated via axisymmetric pattern spontaneous distortion. We start by constructing exact large-deformation solution the equations elasticity such imposed and stretch, which reveals warping twisting cross section abs...

Abstract With increasing demand for rotor blades in engineering applications, improving the performance of such structures using morphing has received considerable attention. Resonant passive energy balancing (RPEB) is a relatively new concept introduced to minimize required actuation energy. This study investigates RPEB helicopter with lag–twist coupling. The structure rotating blade moving ma...