Now showing items 11-20 of 1043
Canonical transformations and graph theory
(Elsevier, 1989-07-03)
In the class of symplectic matrices, two infinite subsets are generated by binary spanning trees. For given N, the procedure begins with the complete graph, KN to which N-1 virtual vertices are added in well-defined ways. ...
Absence of goldstino decoupling in hierarchical superunified models
(Elsevier, 1983-08-25)
It is shown that there exist a class of hierarchical supersymmetric unified models in which the Goldstino field does not decouple from that light states. We illustrate this with an SUN model. The phenomenology and cosmology ...
Efficient algorithms for estimating the width of nearly normal distributions
(Elsevier, 1983-06-15)
Typical physics data samples often conform to Gaussian distributions with admixtures of more slowly varying backgrounds. Under such circumstances the standard deviation is known to be a poor statistical measure of distribution ...
Radiation-affected laminar flame propagation
(Elsevier, 1982)
Increased laminar flame thickness and flame speed under the influence of radiation is shown in terms of an original heat transfer number where is the weighted nongreyness, [kappa]p and [kappa]R are the Planck mean and ...
A mass zero cluster expansion. Part 1: The Expansion
(Springer-Verlag, 1981-09)
A cluster expansion is developed and applied to study the perturbation λ(Δφ) 4 of the massless lattice field φ in dimension 3. The method is loosely inspired by the work of Gawedzki and Kupiainen on block spin techniques ...
Orientation-dependent phase equilibria in in_1-x Ga_x As: A model including surface energies
(Elsevier, 1985)
Orientation-dependent growth phenomena have been observed for liquid-phase epitaxial In1-xGaxAs and other ternary and quaternary III-V semiconductors. The data cannot be explained by existing regular solution phase equilibria ...
Conservation laws and symmetries of generalized sine-Gordon equations
(Springer-Verlag, 1981-06)
We study some systems of non-linear PDE's (Eqs. 1.1 below) which can be regarded either as generalizations of the sine-Gordon equation or as two-dimensional versions of the Toda lattice equations. We show that these systems ...
CT and ultrasound in abscess detection at specific anatomic sites: A study of 198 patients
(Elsevier, 1987)
Records of 902 patients with possible abdominal abscess were reviewed and of these 198 had abscesses on at least one occasion imaged either with ultrasound (US) or computed tomography (CT). There were 235 episodes of either ...
Reaction between YBa2Cu3O7−x and water
(The American Institute of Physics, 1989-02-01)
Reaction between water at 80 °C and YBa2Cu3O7−x (0.8<x<0.0) is studied using x‐ray absorption fine structure (EXAFS) and x‐ray diffraction (XRD). Oxygen deficient YBa2Cu3O7−x reacts with water and decomposes into BaCO3, ...