Search
Now showing items 1-20 of 513
Neutron diffraction and quasielastic neutron scattering studies of films of N-alkanes and a branched alkane adsorbed on graphite
(University of Missouri--Columbia, 2007)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Neutron diffraction and quasielastic neutron scattering have been used to study the structure and dynamics of films of n-alkanes and of a branched ...
Properties of low-dimensional systems
(University of Missouri--Columbia, 2006)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this work we study the equilibrium properties of systems in two-dimensions, and the effects that discrete symmetry, space dimensionality, character ...
Optical Constants of Silicon Carbide for Astrophysical Applications. II. Extending Optical Functions from Infrared to Ultraviolet Using Single-Crystal Absorption Spectra
(American Astronomical Society, 2009)
Laboratory measurements of unpolarized and polarized absorption spectra of various samples and crystal structures of silicon carbide (SiC) are presented from 1200-35000 cm−1 (λ ∼ 8-0.28 μm) and used to improve the
accuracy ...
Theory of lattice effects on magnetic interactions in solids
(University of Missouri--Columbia, 2005)
This dissertation focuses on studying the effect of lattice distortions on the magnetic properties of nickelates and manganites. These two families of materials have great potential in industrial applications in the fields ...
Nonlinear intersubband dynamics in semiconductor nanostructures
(University of Missouri--Columbia, 2007)
The intersubband (ISB) dynamics of conduction electrons in semiconductor quantum wells exhibits a variety of interesting and potentially useful nonlinear phenomena. In this work we present three different formalisms which ...
On the astromineralogy of the 13 [mu]m feature in the spectra of oxygen-rich AGB stars
(University of Missouri--Columbia, 2006)
Approximately half the oxygen-rich AGB stars to be investigated spectroscopically exhibit a feature at 13 [mu]. The carrier of this feature has not yet been unequivocally identified, but has been attributed to various dust ...
The interplay of physical and molecular determinants in limb and cardiac cushion morphogenesis
(University of Missouri--Columbia, 2007)
In an effort to investigate the interplay between molecular determinants and biomechanical properties during early embryonic development we have investigated two separate but similar morphogenetic processes: limb morphogenesis ...
Multiscale modeling of biomolecular systems
(University of Missouri--Columbia, 2007)
Studies of structure-function relationships in biomolecular systems require to follow nanometersize systems on time scales spanning from pico- to micro-seconds, while maintaining atomic scale spatial resolution in all-atom ...
Beyond the standard IAU framework
(Cambridge university Press, 2010)
We discuss three conceivable scenarios of extension and/or modification of the IAU relativistic resolutions on time scales and spatial coordinates beyond the Standard IAU Framework. These scenarios include: (1) the formalism ...
Millimeter Laser Ranging to the Moon: a comprehensive theoretical model for advanced data analysis
(arXiv, 2009)
Lunar Laser Ranging (LLR) measurements are crucial for advanced exploration of the evolutionary history of the lunar orbit, the laws of fundamental gravitational physics, selenophysics and geophysics as well as for future ...
General relativistic theory of light propagation in the field of gravitational multipoles
(University of Missouri--Columbia, 2007)
We consider propagation of electromagnetic signals through the time-dependent gravitational field of an isolated astronomical system emitting gravitational waves. The system is assumed to possess multipole moments of ...
Annealing-Dependent Magnetic Depth Profile in Ga[1-x]Mn[x]As
(American Physical Society, 2004)
We have studied the depth-dependent magnetic and structural properties of as-grown and optimally annealed Ga[1-x]Mn[x]As films using polarized neutron reflectometry. In addition to increasing total magnetization, the ...
Post-Newtonian Reference Frames for Advanced Theory of the Lunar Motion and a New Generation of Lunar Laser Ranging
(arXiv, 2009)
We construct a set of post-Newtonian reference frames for a comprehensive study of the orbital dynamics and rotational motion of Moon and Earth by means of lunar laser ranging (LLR) with the precision of one millimeter. ...
Astrodynamical Space Test of Relativity using Optical Devices I (ASTROD I) - A class-M fundamental physics mission proposal for Cosmic Vision 2015-2025
(arXiv, 2008)
ASTROD I is a planned interplanetary space mission with multiple goals. The primary aims are: to test General Relativity with an improvement in sensitivity of over 3 orders of magnitude, improving our understanding of ...
Post-Newtonian limitations on measurement of the PPN parameters caused by motion of gravitating bodies
(Wiley, 2009)
We derive an explicit Lorentz-invariant solution of the Einstein and null geodesic equations for data processing of the time delay and ranging experiments in the gravitational field of moving gravitating bodies of the Solar ...
Tuning intermolecular interactions in di-octyl substituted polyfluorene via hydrostatic pressure
(arXiv, 2009)
Polyfluorenes (PFs) represent a unique class of poly para-phenylene based blue-emitting polymers with intriguing structure-property relationships. Slight variations in the choice of functionalizing side chains result in ...
Progress in Measurements of the Gravitational Bending of Radio Waves Using the VLBA
(American Astronomical Society, 2009)
We have used the Very Long Baseline Array (VLBA) at 43, 23, and 15 GHz to measure the solar gravitational deflection of radio waves among four radio sources during an 18 day period in 2005 October. Using phase- referenced ...
Reference frames, gauge transformations and gravitomagnetism in the post-Newtonian theory of the lunar motion
(Proceedings of the International Astronomical Union, 2010)
We construct a set of reference frames for description of the orbital and rotational motion of the Moon. We use a scalar-tensor theory of gravity depending on two parameters of the parametrized post- Newtonian (PPN) formalism ...
Units of relativistic time scales and associated quantities
(arXiv, 2010)
This note suggests nomenclature for dealing with the units of various astronomical quantities that are used with the relativistic time scales TT, TDB, TCB and TCG. It is suggested to avoid wordings like "TDB units" and "TT ...
Recent VLBA/VERA/IVS Tests of General Relativity
(arXiv, 2009)
We report on recent VLBA/VERA/IVS observational tests of General Relativity. First, we will summarize the results from the 2005 VLBA experiment that determined gamma with an accuracy of 0.0003 by measuring the deflection ...