Now showing items 1-10 of 14
R Aquarii: First Detection of Circumstellar SiO Maser Proper Motions
(IOP PUBLISHING LTD, 1997-10)
We have made the first detection of circumstellar SiO maser proper motions in the envelope of a late-type star. Using the Very Long Baseline Array (VLBA), we have obtained observations at four epochs of the 43 GHz, upsilon ...
Systematic scaling in the low-energy excitations of the t-J model in one and two dimensions
(American Physical Society, 1997-05-01)
We present an exact diagonalization study of the low-energy singlet and triplet states for both the one-dimensional (1D) and 2D t-J models. A scan of the parameter ratio J/t shows that for most low-energy states in both ...
Infrared reflectivity and lattice fundamentals in anatase TiO2
(American Physical Society, 1997-03-15)
Polarization-dependent far-infrared reflectivity measurements were carried out on single crystals of anatase TiO2. The results were analyzed to yield the dielectric dispersion properties of anatase in the lattice fundamentals ...
Predictions of m(b)/m(tau) and m(t) in an asymptotically nonfree theory
(Amer Physical Soc, 1997-08-01)
Dispersion of a single hole in the t-J model
(American Physical Society, 1997-03-01)
The dispersion of a single hole in the t-J model obtained by the exact result of 32 sites and the results obtained by self-consistent Born approximation and the Green function Monte Carlo method can be simply derived by a ...
An Elementary Method for Detecting and Modeling Regression Parameter Variation Across Frequences With an Application to Testing the Permanent Income Hypothesis
(Virginia Tech, 1997-03)
A simple technique for directly testing the parameters of a time series regression model for instability across frequencies is presented. The method can be easily implemented in the time domain, so parameter instability ...