Browsing Physics and Astronomy by Title
Now showing items 24-43 of 45
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Laboratory Studies of Surface-Atmosphere Water Exchange Processes on Mars
(2019-03-05)The recent discoveries of highly deliquescent perchlorate salts and strongly adsorbing porous minerals on the surface of Mars are intriguing as liquid brine solutions and adsorbed water could potentially provide a habitable ... -
Lidar Measurements of Pollution Above the Canadian Oil Sands
(2018-05-28)Aircraft based lidar measurements of atmospheric aerosol and ozone were conducted to study air pollution from the oil sands extraction industry in northern Alberta. Significant amounts of aerosol were observed in the ... -
Measurement of Pion-Carbon Cross Sections at DUET and Measurement of Neutrino Oscillation Parameters at the T2K Experiment
(2018-08-27)The Tokai-to-Kamioka (T2K) experiment is a long baseline neutrino oscillation experiment. An intense muon neutrino (or antineutrino) beam is produced at the Japan Proton Accelerator Research Complex (J-PARC) by protons ... -
Modified Gravity and Cosmology on the Largest Scales
(2018-03-01)This dissertation presents a series of my contributions to research in theoretical cosmology, focusing on aspects of the very large scale universe, particularly dark energy, cosmic acceleration, modified gravity, and cosmic ... -
Monitoring Broad Absorption-Line Quasar Variability
(2016-09-20)Winds generated by an accreting super massive black hole may provide feedback to the host galaxy and offer an explanation for the co-evolution of galaxies with their super massive black holes that has been reported in the ... -
Multiscale Modelling of Molecules and Continuum Mechanics Using Bridging Scale Method
(2016-11-25)his PhD dissertation is about developing a multiscale methodology for coupling two different time/length scales in order to improve properties of new space materials. Since the traditional continuum mechanics ... -
On the Role of Projectile Electrons in an Independent Electron Model Description of Dressed-Ion Impact on Atoms
(2016-11-25)The presence of electrons on ions which collide with neutral atoms constitutes a challenge to theoretical descriptions of the collision dynamics. These collisions pose quantum-mechanical many-body problems that cannot be ... -
Photometric Calibrations of Metallicity and Temperature For M Dwarfs
(2015-08-28)Based on a carefully collected sample of dwarf stars, a new empirical photometric calibration to estimate the metallicity of late-type K and early-to-mid-type M dwarfs is presented. The calibration sample has two parts; ... -
Precision Microwave Frequency-Offset Separated-Oscillatory-Fields Measurement of the 2^3 P_1to-2^3 P_2 Fine-Structure Interval in Atomic Helium
(2019-07-02)The 2^3P_1-to-2^3P_2 fine-structure interval in atomic helium is measured using the frequency-offset separated-oscillatory-fields (FOSOF) technique. Two temporally separated microwave fields set up excitation paths that ... -
Quantum Interference Effects in Precision Spectroscopy of Helium Fine Structure
(2017-07-26)Precision spectroscopy of atomic helium fine structure provides a means of testing fundamental few-body theory as well as determining the fine-structure constant, which characterizes electromagnetic interactions in nature. ... -
Quantum-Mechanical Approach to Collision-Induced Radiative Emissions
(2018-05-28)Charge exchange is a process that occurs in an atomic collision where an electron from one of the colliding particles is transferred to the other; typically from a neutral atom or molecule to an ion. Electrons transferred ... -
Search For Magnetic Monopoles in 8 TEV Centre-of-Mass Energy Proton-Proton Collisions With the Atlas Detector at the LHC
(2016-09-20)Symmetry is fundamental to our understanding of the laws of nature. The simplicity that is found in the symmetries that explain the most fundamental interactions is remarkably beautiful. Physicists have worked hard and ... -
Semi-Empirical Modeling of Radiolytic Production in the Mars Northern Polar Region
(2016-09-20)A model to simulate the radiolytic production of various compounds in the Mars northern polar region was developed. Galactic cosmic rays are used as the source of particle radiation. Particle energy distributions are ... -
Sensitivity Studies for Argus 1000 Micro-Spectrometer: Measurements of Atmospheric Total Column Carbon Dioxide By Reflected Sunlight
(2016-09-20)A sensitivity analysis of the atmospheric boundary layer (ABL) and the atmospheric total column carbon dioxide was performed. The absorption of reflected solar radiation from the atmosphere and Earths surface near 1.58 m ... -
Stand-Off Detection of Organic Compounds on Mars Using Ultraviolet Raman Spectroscopy and Time-Resolved Laser-Induced Fluorescence
(2016-09-20)Recent discoveries of organic carbon and methane on Mars have continued to motivate the search for complex organics on the Martian surface. Instrumentation that directly identifies and characterizes organic carbon is a ... -
Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices
(2016-09-20)The search for low-cost technologies that reduces our energy consumption is a priority in our struggle for the well-being of our environment. This project had two objectives : (1) Synthesizing BaTiO3 nanoparticles of a ... -
Tatooine's Future: Dynamical Evolution of Planets Orbiting Two Stars
(2018-03-01)Science fiction has long teased our imaginations with tales of planets with two suns. How these planets form and evolve, and their survival prospects, are active fields of research. Expanding on previous work, four new ... -
Testing CPT And Antigravity With Trapped Antihydrogen At ALPHA
(2016-09-20)High precision antihydrogen experiments allow tests of fundamental theoretical descriptions of nature. These experiments are performed with the ALPHA apparatus, where ultra-low energy antihydrogen is produced and confined ... -
The Impact of Atmospheric Models on the Dynamics of Space Tether Systems
(2016-09-20)Space debris has become an increasingly larger concern for aerospace travel and exploration. One idea to control the space debris population is to de-orbit defunct satellites using a space tether system. A space tether ... -
The Strong Isospin-Breaking Correction to the Leading-Order Hadronic Vacuum Polarisation Contribution to the Anomalous Magnetic Moment of the Muon
(2020-05-11)The contribution of strong isospin-breaking (SIB) effects to the value of the anomalous magnetic moment of the muon is studied using the leading-order SIB component of the photon vacuum polarisation function, calculated ...