We study the cosmological evolution of the closed universe on a spherical probe brane moving in the AdSm × S background and the near-horizon background of the dilatonic D-branes. The Friedmann equations describing the evolution of the brane universe, and the effective energy density and pressure simulated on the probe brane due to its motion in the curved background spacetime are obtained and a...

Coordinate-transformation-inspired optical devices have been mostly examined in the continuous-wave regime: performance of an invisibility cloak, which has demonstrated for monochromatic excitation, is likely to deteriorate short pulses. Here, pulse dynamics flexural waves propagating transformed plates investigated. A practical realization a waveshifter and rotator based on coordinate transfor...

Unlike previous studies, the current study uses oil price and inflationary shocks to assess feasibility of actualizing ECOWAS Vision 2020, which is aimed at creating a monetary union. With help Blanchard Quah (BQ) decomposition for sample from 1975:05 2018:08, two sets models are estimated: shocks. It found that although vision mirage, creation common currency can serve as shock absorber agains...