Analytical and numerical results are obtained for the first three approximations to the transport coefficients of a simple gas consisting of massive particles with constant differential cross section. The complete temperature regime is studied, while special attention is paid to both the...

The gas is described by the linearized Boltzmann equation, the wall by hydrodynamics. The rate of interfacial entropy production and an interfacial reciprocity postulate are formulated. Both are rewritten in terms of an interfacial thermodynamical force-flux pair, essentially the sum and the...

The Liouville operator for the step-type interparticle interaction is obtained with the aid of the methods of Ernst, Dorfman, Hoegy, Van Leeuwen and Altenberger.

A new high temperature series renormalization group method is proposed. Our method differs from that of Niemeijer and van Leeuwen in the relative treatment of intracell and intercell interactions. The method is tested on the spin 12 Ising model on the triangular lattice with 3 spin cells and on...

An Ising model is considered on a double Cayley tree, where closed graphs of a particularly simple structure are present contrary to the open tree. The existence of such loops strongly supports correlations but is not sufficient for introducing ordinary cooperative behaviour. For this reason the...

In a previous communication the Boltzmann equations for a bimolecular chemical reaction were transformed into an infinite system of quadratic differential equations. It is shown here that the reaction rate may be calculated approximately by using the first differential equation only, which is a...

The model of Mattis and Langer for superconductors with a structural distortion associated with doubling of the lattice periodicity is studied. New results for the zero-temperature superconducting gap are found in the case of more than a half-filled band. The modification of both the electron...

The dynamics of a randomly diluted Heisenberg ferromagnet on a two-dimensional square lattice is calculated using a CPA procedure introduced by Theumann and Tahir-Kheli. The density of states and frequency-wave-vector-dependent response functions at various symmetry points of the Brillouin zone...

Viscosity coefficient data for the diatomic fluids fluorine and oxygen are very satisfactorily interpreted on the basis of a modified smooth hard-sphere model. The effect of intermolecular attractive forces on the viscosity coefficient at low densities is found to be similar to that previously...

The aim of this work is to draw attention to the precise formulation of theelectromagnetic-multipole transition operators and moments, especially the electric ones. Their precise structure fixes their transformations under some operations, as time reversal and hermitian conjugation, and in this...