Browsing Department of Physics by Title
Now showing items 185-197 of 197
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Temperature- and magnetic-field-induced phase transitions in Fe-rich FePt alloys
(American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2007-06-01)Structural and magnetic properties of the FexPt100-x (x=78–88) alloys have been investigated. It is found that for all of the investigated compositions, a phase transition occurs from the disordered γ phase to the ordered ... -
THE ARECIBO OBSERVATORY AS AN INSTRUMENT FOR INVESTIGATING ORBITAL DEBRIS
(2021-11-22)In this dissertation, the Arecibo Observatory, both past and future, as an instrument for investigating orbital debris is investigated. For over three decades, models of the orbital debris environment in low Earth orbit ... -
THE COMMISSIONING OF THE LOW FREQUENCY ALL SKY MONITOR, THE FIRST DISTRIBUTED PHASED ARRAY TELESCOPE SPECIFICALLY DESIGNED TO SEARCH FOR RADIO TRANSIENTS AT LONG WAVELENGTHS
(2021-05-15)The last two decades have seen a proliferation in the development of technology for low frequency radio astronomy based upon phased elements grouped into one or more large stations. Instruments fielding multiple large ... -
THE RESPONSE OF IONOSPHERE AND THERMOSPHERE TO THE HIGH LATITUDE ENERGY DEPOSITION
(2018-12-10)The ionosphere and thermosphere are the important regions in the Earth upper atmosphere. They represent the ionized and neutral particles, respectively. The main external energy sources in those regions are solar radiation ... -
THE SEARCH FOR EXOMOON RADIO EMISSIONS
(2015-12-07)The field of exoplanet detection has seen many new developments since the discovery of the first exoplanet. Observational surveys by the NASA Kepler Mission and several other instrument have led to the confirmation of over ... -
THEORETICAL INVESTIGATIONS OF THE BULK AND SURFACE PROPERTIES OF PRISTINE AND DOPED PUO2
Plutonium oxides is of widespread significance due its application in nuclear fuels, space missions, as well as the long-termed storage of plutonium from spent fuel and nuclear weapons. The processes which refine and store ... -
THEORETICAL PREDICTION OF MATERIALS FOR EFFICIENT CONVERSION OF SOLAR ENERGY
(2015-12-07)Our present work represents a systematic theoretical and computational research to find an affordable material for solar energy application using density functional theory (DFT) and post-DFT such as DFT+U and DFT-HSE06. ... -
Theoretical Study Of Electronic Properties Of The Cu(001) Surface Under Conditions Of High Coverage Oxidation
(Physics, 2009-09-16)The study of adsorption of oxygen on transition metal surface is important for the understanding of oxidation, heterogeneous catalysis, and metal corrosion. The structures formed on oxidized transition metal surfaces vary ... -
Toward Background-Free Methods to Search For Majorana Neutrinos in Xenon Gas
(2020-08-11)Since the observation of double beta decay 33 years ago the search for neu- trinoless double beta decay has been underway. This is due to the fact that a robust observation of neutrinoless double beta decay is currently ... -
Tracking Stellar Activity Enhancements Due To A Close-in Giant Planet In The HD 179949 System
(Physics, 2010-07-19)We monitored CaII H and K lines (3933Å and 3968Å) of the HD 179949 system to study Planet Induced Emission (PIE) as an effect of star-planet interaction. We obtained high resolution spectra (R > 50,000) with high signal-to-noise ... -
Transformation of electrical transport from variable range hopping to hard gap resistance in Zn[subscript]1−[subscript]xFe[subscript]xO[subscript]1[subscript]v magnetic semiconductor films
(American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2006-11-16)Transformation of the electrical transport from the Efros and Shklovskii [J. Phys. C 8, L49 (1975)] variable range hopping to the “hard gap” resistance was experimentally observed in a low temperature range as the Fe ... -
Two-photon Optogenetic Stimulation Of Cells
(Physics, 12-15-2012)The controlled stimulation of cells, especially neurons, is of significant interest both for basic understanding of neuronal circuitry as well as clinical interventions. Existing electrode-based methods of stimulation ... -
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 ...