Resonant generation and refraction of dispersive shock waves in one-dimensional nonlinear Schrödinger flows by Antin M. Leszczyszyn

“…Both problems also naturally arise in nonlinear optics, where the NLS equation is a standard mathematical model and the `superfluid dynamics of light' can be used for an all-optical modelling of BEC flows. The main results of the Thesis are as follows: (i) In the problem of the transcritical flow of a BEC through a wide repulsive penetrable barrier an asymptotic analytical description of the arising wave pattern is developed using the combination of the localised ``hydraulic'' solution of the 1D Gross-Pitaevskii (GP) equation with repulsion (the defocusing NLS equation with an added external potential) and the appropriate exact solutions of the Whitham-NLS modulation equations describing the resolution of the upstream and downstream discontinuities through DSWs. …”
Get full text

Transcritical flow of a Bose-Einstein condensate through a penetrable barrier by Antin M. Leszczyszyn, Gennady El, Y.G. Gladush, A.M. Kamchatnov

“…The rate of the soliton emission, the amplitudes of the solitons in the train and the drag force are determined in terms of the BEC oncoming flow velocity and the strength of the potential barrier. …”
Get full text

High-temperature superconductivity from realistic Coulomb and Frohlich interactions by A.S. Alexandrov, John Samson, G. Sica

“…In recent years ample experimental evidence has shown that charge carriers in high-temperature superconductors are strongly correlated but also coupled with lattice vibrations (phonons), signalling that the true origin of high-Tc superconductivity can only be found in a proper combination of Coulomb and electron-phonon interactions. …”
Get full text

Effect of sub-inhibitory concentrations of antifungal drugs on adherence of Candida species by Khalid H.A. Abu-Elteen

“…The adherence of three Candida species to human buccal epithelial cells (BECs) following treatment of the yeast with sub-inhibitory concentrations of amphotericin B, nystatin, miconazole nitrate, 5-fluorocytosine, octenidine and pirtenidine was investigated in vitro. …”
Get full text