We study the electric quadrupole density of an isotropic non-polar fluid as a response to the microscopic gradient of the electric fields at the centres of the molecules in the fluid. This contribution to the macroscopic quadrupole tensor is shown to have zero trace. Furthermore we discuss the...

The proposed least-squares method for simultaneous determination of virial coefficients and Burnett constants exploits the fact, that some of the normal equations are linear in certain variables. It does not require any estimates of virial coefficients, only a rough estimate of the apparatus...

Light is a quantum electrodynamic entity and hence bundles of rays must be describable in this framework. We demonstrate the duality in the description of elementary optical phenomena in terms of two-point correlation functions and in terms of collections of light rays. The generalizations...

In the frame of a theory previously developed by the author for non-polar liquids, the static dielectric constant of polar liquids is described through a new formula without adjustable parameters, valid for spherical molecules carrying a mathematical dipole. The application of the formula to 20...

Direct inversion methods are used to analyze the extended principle of corresponding states of Kestin and co-workers in terms of the pair interaction potential. It is shown how reference to the potential makes possible a number of extensions and improvements to the corresponding-states...

We derive Faxén theorems for the force, the torque and the symmetric force dipole moment acting on a spherically symmetric polymer suspended in an arbitrary time dependent compressible flow. The translational and rotational motions of the polymer are allowed to be non-steady as well. These...

The transfer matrix formalism is employed in order to construct the exact renormalization transformation for the one-dimensional Ising model with finite range interaction. The method is applied to the nearest-neighbour model and to the next nearest-neighbour model.

A perturbation method to solve the generalized linear Boltzmann equation is presented for the calculation of dynamic conductivity of a normal metal at low temperatures. The method is applied to the ordinary Boltzmann equation. The following three cases are considered: i) when only...

The effects of fluid spin (internal angular momentum of the fluid molecules) are examined for test particle rotation and translation. Two mechanisms of spin change, namely coupling to linear velocity and spin diffusion, are included in the full hydrodynamic description. The associated general...

A restricted case of a relativistic Hamiltonian particle dynamics is discussed here, the restriction referring to conditions on the interaction. This case permits center-of-momentum variables as well as individual particle variables. The latter satisfy a covariant canonical algebra. It also...