In analogy with mechanics the concepts of field momentum and field angular momentum can be introduced in electrodynamics through conservation laws. In this thesis some fundamental properties of the electromagnetic field angular momentum are treated. This includes the connection to sources, conservation laws and the separation of total angular momentum into a spin and an orbital part. In 1957 Ze...

Red Blood Cell (RBC) suspended in aquatic buffer is trapped and deformed by the dual-beam optical tweezers in order to measure the elasticity of the cell’s membrane. In this experiment, the RBCs were in the natural form of biconcave disc shape. We modeled a highly focused trapping beam of numerical aperture NA=1.25 as a spherical wave with Gaussian intensity distribution in a stationary study m...

Theoretical explanations are presented for the deviation of the shock front thickness from linear hydrodynamics, as observed by W. Eisenmenger (1964) in water and several molecular liquids for large driving pressure differences. Two mechanisms are proposed, which are based on generalizations of the Maxwell relaxation equation for the friction pressure tensor. One is due to the spatial inhomogen...

Five-dimensional Einstein-Maxwell-Chern-Simons equations are investigated in the framework of an extended Kerr-Schild strategy to search for black holes solutions. The fulfillment Einstein constrains Chern-Simons coupling constant a value determined by trace energy-momentum tensor electromagnetic configuration.

Three different approaches to calculating the forces acting on ferromagnets in a stationary magnetic field are considered. The results of by these methods test model compared with measurement data obtained using an experimental unit. Keywords: numerical simulation, magnetostatics, calculation force, Maxwell tensor.

Mixed invariants are used to classify the Riemann spinor in the case of Einstein-Maxwell fields and perfect fluids. In the EinsteinMaxwell case these mixed invariants provide information as to the relative orientation of the gravitational and electromagnetic principal null directions. Consideration of the perfect fluid case leads to some results about the behaviour of the Bel-Robinson tensor re...

We propose a new formulation for the Æther of Dirac based on a lagrangian approach. We analyse how the presence of a particular self-interaction term in the lagrangian lead us to a description of the æther as being a medium with conductivity which is governed by macroscopic Maxwell equations with a polarization tensor Mαβ depending on the vector potential. These results are then applied to the ...

The talk describes recent progress in understanding the behaviour of the stress tensor and its correlation functions at a critical point of a generic quenched random system. The topics covered include: (i) the stress tensor in random systems considered as deformed pure systems; (ii) correlators of the stress tensor at a random fixed point: expectations from the replica approach and c-theorem su...

It’s shown that the rotating dilaton-axion black hole solution can be obtained from GGHS static charged dilaton black hole solution via NewmanJanis method. PACS number(s): 02.30.Dk,04.20.Cv The low energy limit of the heterotic string theory gives an interesting generalization of Einstein-Maxwell theory the Einstein-Maxwell-dilaton axion gravity.The field equations of the Einstein-Maxwell-dilat...

more than half of all hydrocarbon reservoirs are naturally fractured reservoirs (nfrs), in which production forecasting is a complicated function of fluid flow in a fracture-matrix system. modelling of fluid flow in nfrs is challenging due to formation heterogeneity and anisotropy. stress sensitivity and depletion effect on already-complex reservoir permeability add to the sophistication. horiz...