In a model of nonlinear system of three scalar fields the problem on dynamics of a massive particle moving in effective potential provided by two relativistic fields is solving. The potentials for these fields are chosen in the form of anti-Higgs and Higgs potentials. It is shown that the effective potential has the shape of two-hump barrier localized in spacetime. It tends to constant attracti...

Tunnelling probabilities in field emission processes are usually calculated assuming flat emitting surfaces. This corresponds to consider the electric field as a constant along the potential barrier. Previous work have shown the importance of taking into account image effects but neglecting local field variations. Even when the local field has been taken into account, a proper three dimensional...

abstract this research was conducted in the pegah - sorkh sub-catchments area, a semi-arid region in sw iran, using geographic information systems (gis) and remote sensing (rs) to compare the erosion potential method (epm) and modified pacific southwest interagency committee (mpsiac) models in erosion-potential mapping and sediment yield assessment. the study area with approximately 4600 ha sho...