14,876 research outputs found
On the First Order Regression Procedure of Estimation for Incomplete Regression Models
This article discusses some properties of the first order regression method for imputation of missing values on an explanatory variable in linear regression model and presents an estimation strategy based on hypothesis testing
Mineralogical Mapping in the Cuprite Mining District, Nevada
The airborne imaging spectrometer (AIS) has provided for the first time, the possibility to map mineralogical constituents in the Earth's surface and thus has enormously increased the value of remote-sensing data as a tool in the solution of geologic problems. The question addressed with AIS at Cuprite was how well could the mineral components at the surface of a hydrothermal alteration zone be detected, identified and mapped? The question was answered positively and is discussed. A relatively rare mineral, buddingtonie, that could not have been detected by conventional means, was discovered and mapped by the use of AIS
Numerical Study of the Lowest Energy Configurations for Global String-Antistring Pairs
We investigate the lowest energy configurations for string - antistring pairs
at fixed separations by numerically minimizing the energy. We show that for
separations smaller than a critical value, a region of false vacuum develops in
the middle due to large gradient energy density. Consequently, well defined
string - antistring pairs do not exist for such separations. We present an
example of vortex - antivortex production by vacuum bubbles where this effect
seems to play a dynamical role in the annihilation of the pair. We also study
the dependence of the energy of an string-antistring pair on their separation
and find deviations from a simple logarithmic dependence for small separations.Comment: 14 pages, in LATEX, 7 figures (not included
Shell model and deformed shell model spectroscopy of Ga
In the present work we have reported comprehensive analysis of recently
available experimental data [H.M. David et al., Phys. Lett. B {\bf 726}, 665
(2013)] for high-spin states up to with in the odd-odd
nucleus Ga using shell model calculations within the full
model space and deformed shell model based on Hartee-Fock
intrinsic states in the same space. The calculations have been performed using
jj44b effective interaction developed recently by B.A. Brown and A.F. Lisetskiy
for this model space. The results obtained with the two models are similar and
they are in reasonable agreement with experimental data. In addition to the
and energy bands, band crossings and electromagnetic transition
probabilities, we have also calculated the pairing energy in shell model and
all these compare well with the available theoretical results.Comment: 9 pages, 4 figure
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