Department of Physics: Recent submissions
Now showing items 21-40 of 197
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CHARGE TRANSFER AND BUILT-IN FIELDS AT A SEMICONDUCTOR-CRYSTALLINE OXIDE INTERFACE: EFFECTS OF THE INTERFACE DIPOLE AND SURFACE TERMINATION
(2022-08-17)Charge transfer and built-in fields across semiconductor heterojunctions underpin the functionality of virtually all device technologies. In this regard, interfaces between insulating oxides and semiconductors have been ... -
CARDIAC SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY (SPECT) SIMULATION USING THE XCAT PHANTOM AND THE SIMIND PACKAGE
(2022-08-17)Clinical data indicates a prevalence of transmural perfusion defects in the apical, mid, and basal segment of the left ventricle (LV) wall in patients with coronary artery diseases (CAD). To administer therapeutic regimes ... -
MAGNETIC HARDENING IN THE TRANSITION METAL NANOPARTICLES AND NANOWIRES
(2020-08-27)Permanent magnets are important materials widely used in advanced technologies including electric vehicles, windmills, memory devices, magnetic levitation transportation, and biomedical apparatus. Rare-earth-based compounds ... -
FIRST-PRINCIPLES STUDIES ON THE PIEZOELECTRICITY AND FERROELECTRICITY OF KNN RELATED MATERIALS
(2020-08-13)Nowadays, with the increasing environmental concerns, K1-xNaxNbO3 (KNN)-based materials have gained enormous interest and attention as one of the most promising lead-free piezoelectric materials because of their excellent ... -
Investigation of range verification in carbon ion therapy using Monte Carlo simulation
(2020-08-11)Carbon ion therapy is one of the advanced forms for radiotherapy and currently only available in few developed countries. Unlike conventional radiation therapy methods, carbon ion therapy has high potential in treating ... -
INVESTIGATION OF PROTOPORPHYRIN IX AND COPPER CYSTEAMINE NANOPARTICLES TO IMPROVE CURRENT CANCER TREATMENT METHODS
(2020-07-23)This research is focused on using nanotechnology to improve current cancer treatment methods, particularly photodynamic therapy and chemotherapy. Photodynamic therapy, being a local treatment method with low systemic ... -
A comparative look at atomic oxygen and carbon dioxide neutral densities on Mars using data from the MAVEN satellite mission
(2020-05-14)This thesis uses the level 2 limb scan data from the IUVS instrument onboard the MAVEN satellite to investigate the density distributions of atomic oxygen and carbon dioxide in the lower thermosphere of Mars. In addition ... -
LOCALIZED BANDS AND THEIR EFFECTS IN THE STRONGLY CORRELATED d AND f ELECTRON SYSTEMS: A FIRST PRINCIPLES STUDY
(2021-08-16)Strongly correlated materials such as d and f-electron systems manifest a broad range of interesting phenomena such as metal-insulator transition, high temperature superconductivity, topologically insulating behavior etc. ... -
Energy Dissipation during Geomagnetic Storms
(2021-12-20)Some fraction of the solar wind energy is transferred to the Earth magnetosphere and ionosphere. Sometimes this transfer of energy is exceptionally large, producing a magnetic storm. Storms occur when the Interplanetary ... -
A Cross Section Measurement of Muon Neutrino-Induced Charged-Current Coherent Positive Pion Production on Argon with the MicroBooNE Detector
(2022-05-17)Neutrino-induced charged-current coherent pion production is an important channel for the study of neutrino-nucleus interactions. It is both a dangerous background for $\nu_{e}$ oscillation experiments, and a critical ... -
NONLINEAR MODE COUPLING COEFFICIENTS IN EXTRASOLAR HOT JUPITER SYSTEMS WITH NON-SOLAR TYPE HOST STARS
(2021-12-23)Short period planets tidally excite internal gravity modes within their host star. These excited modes, known collectively as the dynamical tide, dissipate orbital energy and cause the planet’s orbit to decay. In hot Jupiter ... -
Orbital Evolution Studies and Radio Searches of Extra-Solar Moons
(2021-12-13)Exoplanetary research has undergone a great deal of development and growth. Achievements in theoretical studies and detection techniques have led to the discovery of 4,000+ exoplanets in ~3, 000 planetary systems to date. ... -
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 ... -
DEVELOPMENT AND APPLICATIONS OF A MULTI-FUNCTIONAL POSITRON BEAM FOR SPECTROSCOPIES OF SURFACES AND INTERFACES
(2019-09-03)This dissertation describes the construction of a multi-functional positron beam and the methods employed for the analysis of digitized data produced by electron time-of-flight and gamma spectrometers. The positron beam ... -
Observation and analysis of unexplored low-energy electron emission processes revealed using a low-energy positron beam
(2020-08-17)This dissertation presents measurements of the kinetic energy distributions of low-energy, positron-induced electrons emitted from single-layer of graphene (SLG), highly oriented pyrolytic graphite (HOPG), Si, Cu and TiO2 ... -
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 ... -
Multiscale ionospheric electrodynamics and their impacts on the ionosphere-thermosphere system
(2020-08-11)In this dissertation, multiscale ionospheric electrodynamics at different latitudinal regions and their impacts on the ionosphere and thermosphere (I-T) system have been studied in three aspects. Firstly, impacts of the ... -
ns2-md0 Post-Transition Metal Oxides for Solar Energy Applications
(2020-08-10)Meeting the growing global energy demand while mitigating the deterioration of the global climate requires the rapid introduction of clean, renewable, and sustainable fuels. Solar energy output at daytime provides more ... -
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 ... -
Investigation of Clinoptilolite Zeolite as a Candidate System for Study by Positron Annihilation
(2021-04-14)This thesis reports on the characterization of a clinoptilolite zeolite (〖Na〗_3 [〖Al〗_3 〖Si〗_15 O_36 ]12H_2 O) using Energy-dispersive X-ray spectroscopy (EDX/EDS) for chemical analysis, low energy Secondary Electron (SE) ...