Showing papers on "Crossover published in 1977"

Crossover structure for microelectronic circuits

Abstract: Disclosed is a crossover structure and method of fabricating such structure which contributes low capacitance to the circuit performance. The crossover utilizes a dielectric material which includes spheres of an insulating material in order to separate the conductors. In one aspect of the invention, a UV curable epoxy including hollow glass spheres is deposited on the crosspoint areas and the crossover connector deposited thereon. In another aspect of the invention, the crossover is formed with an air gap and the gap is subsequently filled with an encapsulating material including the spheres.

Susceptibility crossover in dipolar ferromagnets

Abstract: Renormalization group and epsilon expansion methods are used to investigate dipole-induced crossover behaviour in the susceptibility of a ferromagnet to O( epsilon 2). The calculations confirm the existence of a striking minimum of the effective susceptibility exponent in the crossover regime.

Dipolar crossover effects for uniaxial ferromagnets and ferroelectrics

Abstract: The dipolar-interaction induced crossover of a uniaxial ferromagnet (or ferroelectric) from Ising critical behaviour in the primary critical region to Gaussian critical behaviour in the secondary critical region is studied. The crossover scaling functions for the susceptibility and specific heat are calculated by renormalisation group methods at leading order in epsilon =4-d.

Equivalent circuit of the asymmetric crossover junction

Abstract: The asymmetric crossover junction has been characterised experimentally and compared with the T-junction. This comparison indicates that the T-junction data may be used as a first step to estimate the properties of the crossover.

A generalized parametric equation of state describing the global behaviour of an Ising-like system

Abstract: The authors report a microscopic derivation of the parametric representation of the equation of state for an Ising-like system by means of the skeleton expansion technique. Such a representation explicitly describes the crossover behaviour from the small correlation length region to the critical region. The Gaussian-Ising crossover is obtained at criticality. The derivation is based on differential relations that connect natural thermodynamical variables with the parameters defining the representation. Differentiability properties are checked in the small epsilon limit.

The Crossover Model Applied to Nonhuman Operators

Abstract: -Two manual control systems with rhesus monkey operators have been studied using control theory techniques. The first control system was a single-axis compensatory task; the second was a dual-axis ground-based simulator. The present study summarizes the control theory analysis of these rwo previous experiments. The crossover model, developed for human operators in manual control systems, was successfully applied to these data. Results of the present study provide additional evidence for monkey-man extrapolation in the area of manual control.

Quantum classical crossover critical behavior of the Ising model in a transverse field

Abstract: The Ising model (spin 1 2 ) in a transverse field has many applications in the field of cooperative phenomena (magnetism, Jahn-Teller effects, ferroelectricity). The quantum classical crossover critical behavior is studied for a d-dimensional system with exact results when d = 1. The crossover behavior depends strongly on the relative magnitude of the crossover exponent φ and of the critical line shift exponent Ψ.