### Recent Submissions

• #### A Density Functional Theory Guide To High Quality Modification Of Mixed Metal Oxides Used For Photocatalytic Water Splitting ﻿

Phase stability and charge transport of pristine and transition metal alloyed bismuth titanate (Bi2Ti2O7, a.k.a. BTO), a photocatalytic water splitter, has been studied using the generalized gradient approximated density ...
• #### Search For A Supersymmetric Partner To The Top Quark Using A Multivariate Analysis Technique. ﻿

Supersymmetry (SUSY) is an extension to the Standard Model (SM) which introduces supersymmetric partners of the known fermions and bosons. Top squark (stop) searches are a natural extension of inclusive SUSY searches at ...
• #### Precision Higgs Coupling Measurements In H→ww*→lνlν Final State With The Atlas Detector At The Lhc ﻿

The Standard Model (SM) is a gauge theory that describes the fundamental particles of matter and the forces between these particles. It has been tested to a very high precision in the past several decades, except for ...
• #### Investigations on the impact of spatial ability and scientific reasoning of student comprehension in physics, state assessment test, and STEM courses ﻿

Physics examines topics that are highly spatial in nature. Students are required to visualize a system, manipulate that system, and then solve a given problem. Doing all of this simultaneously can lead to a cognitive ...
• #### Laser-assisted Transfection, Optogenetic Stimulation And Its Detection In Mammalian Cells ﻿

Stimulation of cells, especially neurons is of significant interest both for basic understanding of neuronal circuitry as well as clinical intervention. Existing electrode-based methods of stimulation is invasive and ...
• #### First Principles Study Of Ga-stabilized δ-Pu Bulk And Surfaces ﻿

Plutonium (Pu) metal is highly reactive toward environmental gases and corrodes at a high rate. Due to this inevitable process, containers used to store Pu-based materials may experience catastrophic failure, subsequently ...
• #### Cutoff Frequencies For Alfven Waves In The Solar Atmosphere ﻿

Propagation of linear Alfven waves in the isothermal and non-isothermal solaratmosphere is investigated numerically and analytically. It is shown that thetwo wave variables, the velocity and magnetic field perturbations, ...
• #### Evidence Of A Positron Bound State On The Surface Of A Topological Insulator ﻿

We describe experiments aimed at probing the sticking of positrons to the surfaces of topological insulators performed at university of Texas at Arlington using the Positron Annihilation induced Auger electron Spectrometer. ...
• #### Investigating The Global Geospace Response To A Period Of Solar Wind High Speed Streams Using The Lyon-Fedder-Mobarry MHD Simulation ﻿

As the solar wind flows past the Earth, it interacts with the Earth's magnetic field and transfers energy and momentum to the geospace environment. During times when the solar cycle is near a minimum, there is a tendency ...
• #### Orbital Stability Analysis And Chaotic Dynamics Of Exoplanets In Multi-stellar Systems ﻿

The advancement in detection technology has substantially increased the discovery rate of exoplanets in the last two decades. The confirmation of thousands of exoplanets orbiting the solar type stars has raised new ...
• #### Experimental Studies Of Fundamental Aspects Of Auger Emission Process In Cu(100) And Ag(100) ﻿

(Physics, 2014-09-17)
Auger spectra at the low energies are accompanied by large contributions unrelated to the Auger transition. The Auger unrelated contributions can obscure the Auger peak and affect the quantitative analysis of the materials ...
• #### Biological Damage Of UV Radiation In Environments Of F-type Stars ﻿

(Physics, 2014-07-14)
I investigate the general astrobiological significance of F-type main-sequence stars with special consideration to stellar evolutionary aspects due to nuclear evolution. DNA is taken as a proxy for carbon-based macromolecules ...
• #### Phenomenological Studies Of Dark Matter ﻿

(Physics, 2014-07-14)
It is common knowledge that eighty percent of the matter in our Universe consists of a mysterious substance called dark matter'' (DM) which has only been detected through its gravitational interactions. The Standard ...
• #### The Variations Of Geomagnetic Energy And Solar Irradiance And Their Impacts On Earth's Upper Atmosphere ﻿

(Physics, 2014-03-10)
The primary energy sources of Earth's upper atmosphere are the solar irradiance and geomagnetic energy including Joule heating and particle precipitation. Various data and models are utilized to investigate the variations ...
• #### Optimization Of Energy Resolution In The Digital Hadron Calorimeter Using Longitudinal Weights ﻿

(Physics, 2013-07-22)
Particle physics seeks to describe matter in its most elementary structure. With lepton colliders; couplings of gauge bosons and heavy quarks, physics beyond the Standard Model, and properties of a recently discovered Higgs ...
• #### Search For The Standard Model Higgs Boson In eτ Final States ﻿

(Physics, 2013-07-22)
Presented in this dissertation is a search for the standard model (SM) Higgs boson using the DØ detector at Fermilab in Batavia, IL. The SM is a fantastically accurate theory describing the fundamental interactions and ...
• #### Interaction Of The Geomagnetic Field With Northward Interplanetary Magnetic Field ﻿

(Physics, 2013-07-22)
The interaction of the solar wind with Earth's magnetic field causes the transfer of momentum and energy from the solar wind to geospace. The study of this interaction is gaining significance as our society is becoming ...
• #### Atomic And Molecular Adsorptions Of Hydrogen And Oxygen On Silicon Nanotubes: An Ab Initio Study ﻿

(Physics, 2013-07-22)
A systematic ab initio study of silicon nanotubes (SiNTs) in single-walled, double-walled armchair and zigzag configurations will be presented. Electronic and structural properties of all these nanostructures have been ...
• #### Magnetic Thermal Hysteresis In Dy, Gd And Gd/Dy/Gd Nanolayers And Experimental Determination Of Thermodynamic Properties Of Thin Film Systems. ﻿

(Physics, 2013-03-20)
Magnetic thermal hysteresis (MTH) is observed when the temperature dependent magnetic properties of a material are reliant on the starting point of the measurement. MTH was observed in thin film Dy samples at low values ...
• #### Silicon Carbide At Nanoscale: Finite Single-walled To "infinite" Multi-walled Tubes ﻿

(Physics, 2013-03-20)
A systematic ab initio study of silicon carbide (SiC) nanostructures, especially finite single-walled, infinite double- and multi-walled nanotubes and nanocones is presented. Electronic and structural properties of all ...