Browsing Department of Physics, Engineering Physics and Astronomy Graduate Theses by Title
Now showing items 141-160 of 237
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Nanoelectromechanical Studies of Suspended Resonators using Graphene grown by Chemical Vapour Deposition
Graphene is an ideal material for high quality nanoelectromechanical resonators due to its high Young's modulus, low mass to surface ratio, ability to sustain high in-plane strain, and unique electrical properties like ... -
Nature or Nurture? Collisionless Evolution of Galactic Disc-Halo Systems
In this thesis, we develop and apply a novel algorithm to understand the evolution of stellar discs in ΛCDM cosmological haloes. Three main scientific areas are addressed: the effects of evolving stellar discs on their ... -
The Near-Infrared Imaging of the Andromeda Galaxy
(2010-12-07)The Andromeda Galaxy (M31) is an ideal target for detailed studies of galaxy structure and tests of stellar population models. This thesis presents deep Canada-France-Hawaii Telescope WIRCam near-infrared J- and Ks-band ... -
A New and Improved Spin-Dependent Dark Matter Exclusion Limit Using the PICASSO Experiment
(2009-11-18)The PICASSO project is a direct dark matter search experiment located 2070 metres underground in SNOLAB. Superheated droplets of Freon (C4F10) are used as the active mass, providing a target for the incoming neutralinos. ... -
Non-circular flows in HIghMass Galaxies in a Test of the Late Accretion Hypothesis
This thesis investigates the late accretion hypothesis as an explanation for the unusual gas-richness of the HIghMass sample, a collection of 34 galaxies from the recently completed Arecibo Legacy Fast ALFA survey. Accretion ... -
Nonlinear Response of Monolayer Graphene to THz Frequency Radiation
Graphene, as a zero-bandgap two-dimensional semiconductor with a linear electron band dispersion near the Dirac points, has potential to exhibit very interesting nonlinear optical properties. In particular, third harmonic ... -
Nonlinear Response of Unbiased and Biased Bilayer Graphene at Terahertz Frequencies
(2016-03-31)The main focus of this thesis is the investigation of the nonlinear response of unbiased and biased bilayer graphene to incident radiation at terahertz frequencies. We present a tight-binding model of biased and unbiased ... -
A Numerical Investigation of the Impact of Inclinations on the Estimates of Photometric and Dynamical Properties of Galaxies
We exploit N-body simulations (GalactICS, Illustris, NIHAO) to study the impact of inclination on the estimates on various photometric and spectroscopic quantities of galaxies such as sizes, surface brightnesses, stellar ... -
Numerical Modelling of Eddy Current Probes for CANDU® Fuel Channel Inspection
(2016-10-03)Multi-frequency Eddy Current (EC) inspection with a transmit-receive probe (two horizontally offset coils) is used to monitor the Pressure Tube (PT) to Calandria Tube (CT) gap of CANDU® fuel channels. Accurate gap measurements ... -
Numerical Simulations of Giant Planetary Core Formation
(2012-08-28)In the widely accepted core accretion model of planet formation, small rocky and/or icy bodies (planetesimals) accrete to form protoplanetary cores. Gas giant planets are believed to have solid cores that must reach a ... -
Numerical Studies of the Combined Effects of Interactions and Disorder at Metal-Insulator Transitions
(2009-05-26)We first study noninteracting electrons moving on corner-sharing tetrahedral lattices, which represent the conduction path of LiAlyTi2−yO4. A uniform box distribution type of disorder for the on-site energies is assumed. ... -
A numerical study of galaxy mass density profiles
(2007-08-02)An understanding of the shape and nature of galaxy density profiles remains a major challenge to galaxy structure studies. The physical mechanisms thought to control these profiles include star formation rates and dynamical ... -
On an Emerging Paradigm of Tepid Stars: Assessing the Magnetic Desert and the Magnetic Origin of Surprisingly Common Star Spots
The past decade has seen several significant shifts in the field of stellar magnetism, particularly on the observational front. A new generation of dramatically more efficient, high-resolution spectropolarimetric instruments ... -
On the Development of the Wavelength Shifter Deposition System for the DEAP-3600 Dark Matter Search Experiment
(2015-11-03)The DEAP-3600 dark matter search experiment uses 3600 kilograms of liquid argon as a target medium contained in a spherical acrylic vessel. Particle interactions in liquid argon produce vacuum ultraviolet light at a peak ... -
On the influence of the cosmological constant on trajectories of light and associated measurements
(2013-10-01)In this thesis we review and build on the common methods used to analyze null geodesics in Schwarzschild de Sitter space. We present a general technique which allows finding measurable intersection angles of null trajectories ... -
Optical And Acoustical Studies Of The Proposed PICO-250L Dark Matter Detector
(2014-11-20)In the first part of this work I explore the possibility of using linear alkylbenzene, the buffer liquid for the future PICO-250L detector, configured as a liquid scintillator that could provide information on the background ... -
Optical properties of chiral thin films and microparticles
(2016-09-20)In this work I study the optical properties of helical particles and chiral sculptured thin films, using computational modeling (discrete dipole approximation, Berreman calculus), and experimental techniques (glancing angle ... -
Optical Properties of Individual and Bundled Single-Walled Carbon Nanotubes
(2014-09-13)Single-walled carbon nanotubes (SWCNTs) are nearly ideal one-dimensional systems, with aspect ratios exceeding 10$^{5}$:1. The band gap of a SWCNT, determined by the species, covers the majority of the visible spectrum ... -
The optical properties of metamaterial waveguide structures
(2008-11-04)Metamaterials, artificially engineered structures with negative average relative permittivity and permeability, provide a route to creating potential devices with exciting electromagnetic properties that cannot be obtained ... -
Optically Active Chiral Mediums Fabricated with Glancing Angle Deposition
(2012-07-06)Optically active helical microparticles are studied in the forms of thin films, suspensions and powders. From fabricated helical porous thin films, microparticle suspensions are obtained by removing the microparticles (film ...