A special case of the spin system proposed in the previous paper (i.e., paper I of the same series) is considered, which includes only the Ising term besides the four-spin coupling. In view to describe adequately collinear metamagnets, the thermodynamic properties of this model are investigated....

Space-time memory functions for density correlation functions are derived from several simple kinetic equations and found to be simply expressed in terms of the memory functions for a free-particle system. Spectral and temporal behavior which illustrate the effects of free molecular flow,...

In a recent paper1) a differential equation was studied which involves a stochastic process having the property that all its cumulants are delta-correlated. It is here shown that such processes consist of a random sequence of delta functions with random coefficients. As a consequence the...

A treatment is given of classical Brownian motion in phase space based on path summation. It treats efficiently the usual exactly solvable cases when the external force is linear in momentum or position. The method might be useful for generating approximations for more complicated external...

A new method of finding nonlinear Langevin type equations of motion for relevant macrovariables and the corresponding master equation for systems far from thermal equilibrium is presented by generalizing the time-convolutionless formalism proposed previously for equilibrium hamiltoian systems by...

A moderately dense gas of particles interacting through the pair potential, consisting of the hard core and the step repulsive barrier, is considered. Using the concepts underlying the Enskog theory for hard spheres we give the microscopic derivation of the kinetic equation in a case of our...

By means of generalization of the metrics (1)–(3) a solution for gravitational equations near the naked singularities containing four physically arbitrary functions with three variables has been obtained. It is proved that hydrodynamically moving matter cannot reach singularities of such a type.

A model for a superconductor with magnetic impurities is solved exactly on the basis of the method of approximating Hamiltonians. The model consists of a combination of the BCS model and the Zener s-d exchange interaction model. The thermodynamically equivalent Hamiltonian is constructed from...

The dynamics of a charged drop is described as modes of deformation from the saddle point shapes. On using five deformation parameters, one finds that the symmetric unstable mode tends to increase the thickness of the middle neck, thus forbidding the scission into two equal parts.

A non-local generalization of extended irreversible thermodynamics is developed. Both the entropy flux and the evolution equation of the heat flux are obtained as constitutive equations of the theory. The latter equation is used to described the fluctuations of the heat flux in the...