A distributive process of the binomial type in a one-dimensional discrete space with an absorbing barrier is studied. A simple expression for the particle number Σ(t) is derived. The analysis is based on recursion relationships and sum rules for the underlying eigenvectors, the Krawtchouk...

In diluted gases the rate coefficients of ion-molecule reactions in an electric field depend on the characteristic ratio EPkBΘ where EP represents the energetic threshold for the reaction and kBΘ is the mean kinetic energy summarizing both electric field effects and collision processes within...

The effects of configurational, quenched, bond randomness on the critical properties of the nearest-neighbour Ising model are studied in two and three dimensions by a real space renormalization group method. Correlations between the random bonds generated by the renormalization group...

The paper presents new absolute measurements of the thermal conductivity of the five noble gases at a nominal temperature of 27.5°C and over a range of pressures. Measurements were made in a transient hot-wire apparatus whose design and operational equations have been published earlier. These...

A well defined notion of generalized Onsager-Machlup Lagrangian in the covariant formalism of general diffusion processes is obtained without any discretization procedure. Main ideas are to clarify some basic links between the conventional Fokker-Planck description and a Schrödingerlike...

The paper reports accurate measurements of the thermal conductivity of ethane, ethylene, nitrous oxide, air and argon-free air as a function of density at a temperature of 27.5°C. In the case of ethane the experimental data extend over the pressure range 0.6–3.4 MPa, for ethylene over the...

The problem, recently posed by Widom and Khosla, of providing a general classification of pairs of densities in the planes of which the coexistence curves and critical isotherms are tangent and of degree (1 − α)/β is solved in the framework of a general transformation theory in...

We study a mixture of classical particles where unequal particles interact with strong binding forces, while equal particles repel each other with a hard-core interaction. The interactions are constructed so that at most two unequal particles can bind to a molecule. Such a system can be...

The complications encountered in direct renormalization approaches for the self-avoiding walk problem are discussed. Using a decimation transformation on the square lattice, sequences of approximants to the critical exponent ν and to the inverse connective constant Kc(1Kc = μ) are obtained.

The dynamics of the paramagnetic spin (S=12) system, treated as an open system interacting with an alternating magnetic field and a lattice (phonons), is considered. Starting with the generalized kinetic equations, the non-Markovian equations describing the Zeeman, the dipole interaction and the...