We show that a soliton scattered by an external delta potential splits into two solitons and a radiation term. Theoretical analysis gives the amplitudes and phases of the reflected and transmitted solitons with errors going to zero as the velocity of the incoming soliton tends to infinity. Numerical analysis shows that this asymptotic relation is valid for all but very slow solitons. We also sh...

OBJECTIVES Tissue Doppler imaging (TDI) is an echocardiographic technique that evaluates longitudinal myocardial tissue velocities during left ventricular systolic and diastolic function, relatively independently of loading conditions. Limited data are available regarding maternal cardiac function using TDI. The aim of this study was to construct reference charts for TDI indices in normal pregn...

Presenting information acoustically has become increasingly interesting for technique training and control in elite sport. In rowing, acoustic feedback is a new and promising application to optimize the boat motion. By taking advantage of auditory perception, which is particularly sensitive to temporal resolution, the physics-based movements are mapped to acoustic parameters using Parameter Map...

Polymeric insulating layer may show propagating surface discharges when they are irradiated under vacuum with high energy electrons. Such discharges could create electromagnetic interferences on geosynchronous spacecraft during magnetic storms. These discharges can be triggered at a defect zone or at the edge of the sample or following the electrical breakdown of the material. The values of the...

The flow of viscoelastic fluids between parallel plates under the combined influence of electro-osmotic and pressure gradient forcings with asymmetric boundary conditions, by considering different zeta potentials at the walls, is investigated. The fluids are z–z symmetric electrolytes. The analytic solutions of the electrical potential, velocity distributions and streaming potential are based o...

The hydrodynamic problem of impact between a solid wedge and a liquid wedge is analysed. The liquid is assumed to be ideal and incompressible; gravity and surface tension effects are ignored. The flow generated by the impact is assumed to be irrotational and therefore can be described by the velocity potential theory. The solution procedure is based on the analytical derivation of the complexve...