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The quadratic approximation for quintessence with arbitrary initial conditions
(Vanderbilt University. Department of Physics and Astronomy, 2014-04)
We examine models of quintessence in which a minimally-coupled scalar field
phi evolves near a
local extremum of its potential V ( phi) at phi_*. Assuming that (1/V
)(dV/dphi) is small and w ~ -1, we
Taylor expand the ...
Emittance and entropy of electron beams
(Vanderbilt University. Department of Physics and Astronomy, 2014-04)
Creating high-brightness electron beams, which have many practical
applications, is done with cathodes in regions with large electric
field by field emission. The brightness is high when the current is
high and the ...
Finite-Element Analysis of Low-Power Laser Heating in Gold::Vanadium Dioxide Nanocomposites
(Vanderbilt University. Dept. of Physics and Astronomy, 2011-04)
Finite element modeling was performed using COMSOL Multiphysics to study the
thermal dynamics of gold::vanadium dioxide (VO$_{2}$) nanocomposites. These
simulations were done to understand the data from transient ...
Nanoscale dolmen structure exhibiting a tunable Fano resonance
(Vanderbilt University. Dept. of Physics and Astronomy, 2016-05-02)
A Fano resonance is an asymmetric, resonant scattering phenomenon which occurs in a multitude of fields, such as atomic physics, nuclear physics, nonlinear optics, and nanophotonics. The Fano resonance is a many-particle ...
LieART 2.0--An Improved Way to Compute Branching Rules
(Vanderbilt University. Dept. of Physics and Astronomy, 2019-04-18)
In this thesis, we present LieART 2.0 which contains substantial extensions to the Mathematica application
LieART (Lie Algebras and Representation Theory) for computations frequently encountered in Lie algebras and ...
Reflection and rotation for three dimensional microscopy of live cells
(Vanderbilt University. Dept. of Physics & Astronomy, 2008-04-18)
Confocal scanning laser microscopy and multiphoton microscopy provide 3D data from biological specimens, but with limited z-axis precision. Multiple microscale mirrors can be used to obtain more accurate 3D data on living ...
Influence of patient size on dose to female breast tissue during routine computed tomography scans
(Vanderbilt University. Dept. of Physics & Astronomy, 2008-04-21)
Monte Carlo methods are well suited to the evaluation of radiation transport phenomena. The scalable phantoms employed in this project permitted rapid creation of three models of similar geometry, but different body habitus. ...
Micro Programmable Object Navigation Gadget (micro-PONG) for Studying Electroosmotic Flow in PDMS Microchannel
(Vanderbilt University. Dept. of Physics and Astronomy, 2009-04-20)
Precise control of fluid delivery in analytical devices may be achieved by harnessing electroosmotic flow (EOF) in oxidized
poly(dimethylsiloxane) microfluidic channels fabricated via soft lithography. However, the ...
Engineering a perfusion-enabled mechanical compressor for long-duration immobilization and microscopy of cells and small organisms
(Vanderbilt University. Dept. of Physics and Astronomy, 2011-04)
The study of living specimens is essential to the understanding of
organismal behavior. Unfortunately, a major difficulty in the study of
live organisms is that many move in and out of the field of view or
focal plane ...
Perturbation Theory for Thin Cladding Layers on Silicon Photonic Systems
(Vanderbilt University. Dept. of Physics and Astronomy, 2011-04)
I develop a perturbation theory for resonant frequency shifts caused by thin
layer of material added to dielectric systems. This development can be used
to effectively model photonic surface-sensing systems, which use ...