In this paper, S-shape microstrip patch antenna is investigated for wideband operation using circuit theory concept based on modal expansion cavity model. It is found that the antenna resonates at 2.62 GHz. The bandwidth of the S-shape microstrip patch antenna 21.62 % (theoretical) and 20.49% (simulated). The theoretical results are compared with IE3D simulation as well as reported experimental...

A new implementation of boundary condition based on the half-covolume and bounce-back rule for the non-equilibrium distribution function for the finite volume LBM is proposed here. The numerical simulation results for the expansion channel flow and driven cavity problem indicate that this method is workable for arbitrary meshes. In addition, the fourth order Runge–Kutta scheme is found to be a ...

cannot understand how this statement could creep into this excellent text-book. Tubercular deposits, it is easy to imagine, would interfere with the passage of blood along the veins of Galen or obstruct the foramina in the pia matral expansion covering the lower part of the fourth ventricle, producing a disturbance of pressure equilibrium within and without the brain. The increase of fluid in t...

Abstract. Experimental setup for spectroscopic measurements of molecular radicals at low temperatures is presented. Radicals are created in a DC discharge and cooled by supersonic expansion. Absorption spectroscopy in the near IR region is used to probe the neutral transient species formed in the discharge, using tuneable extended cavity diode lasers. Initial characteristics of the radical sour...

In This paper, optical Filter based on photonic crystal ring resonator with square lattice is proposed. The add-drop filter is designed by coupling in line quasi waveguide and resonant cavity. Photonic band gap is obtained by plane wave expansion method (PWE) and Simulation is carried out by Finite Difference Time Domain method (FDTD).This type of add-drop filter provide high transmission effic...

In this paper we study optimal control problems of the uid ow governed by the Navier-Stokes equations. Two control problems are formulated in the case of the driven cavity and ow through a channel with sudden expansion and solved successfully using a numerical method based on the augmented Lagrangian method. Existence and rst order optimality condition of the optimal control are established. A ...

We experimentally investigate the dispersion curve of an integrated silicon-on-insulator coupled-cavity waveguide in a photonic crystal environment using a technique based on far-field imaging. We show that a chain of eight coupled cavities of a moderate Q factor can form a continuous dispersion band characterized by extremely flat dispersion and a group index of 105+/-20 within a 2.6 nm wavele...

Mucocele of the paranasal sinuses is a distinct clinicopathologic entity in which there is obstruction of the sinus cavity outflow tract, resulting in expansion of the sinus walls. The histologic features are quite nonspecific, requiring clinical, radiologic, and pathologic correlation. Most of these lesions result from increased pressure in the sinus due to sinus outlet obstruction, usually as...