• First application of CsI(Tl) pulse shape discrimination at an e^+ e^- collider to improve particle identification at the Belle II experiment 

  Longo, Savino (2019-10-31)

  This dissertation investigates CsI(Tl) pulse shape discrimination (PSD) as a novel experimental technique to improve challenging areas of particle identification at high energy $e^+ e^-$ colliders using CsI(Tl) calorimeters. ...
• Hierarchical ammonia structures in galactic molecular clouds 

  Keown, Jared (2019-10-15)

  Recent large-scale mapping of dust continuum emission from star-forming clouds has revealed their hierarchical nature, which includes web-like filamentary structures that often harbor clumpy over-densities where new stars ...
• SpaceOAR hydrogel optimization and management for rectal sparing in prostate cancer patients 

  Paetkau, D. Owen (2019-09-27)

  External beam radiation therapy for prostate cancer can result in urinary, sexual, and rectal side effects, often impairing quality of life. A polyethylene glycol-based product, SpaceOAR hydrogel (SOH), implanted into the ...
• Resolved properties of galaxy mergers from the MaNGA survey 

  Thorp, Mallory D. (2019-08-23)

  The complex and diverse populations of galaxies observed today form hierarchically through past galactic mergers. Interactions between galaxies of similar masses will drastically alter the morphology, chemical composition, ...
• Dwarf galaxy star formation histories in Local Group cosmological simulations 

  Digby, Ruth A. R. (2019-08-23)

  Dwarf galaxies are powerful tools in the study of galactic evolution. As the most numerous galaxies in the universe, they probe a diverse range of environments: some exist in near-isolation, allowing us to study how a ...
• The development of missing transverse momentum reconstruction with the ATLAS detector using the PUfit algorithm in pp collisions at 13 TeV 

  Li, Zhelun (2019-08-19)

  Many interesting physical processes produce non-interacting particles that could only be measured using the missing transverse momentum. The increase of the proton beam intensity in the Large Hadron Collider (LHC) provides ...
• The effects of sea ice on the tides in the Kitikmeot Sea: results using year–long current meter data from Dease Strait and tidal models 

  Rotermund, Lina M. (2019-08-06)

  We examine the tides in the Kitikmeot Sea using year-long time-series from moored instrumentation in Dease Strait, and a 3D barotropic numerical tidal model of the region. The in-situ data show strong tidal damping during ...
• Results of the 2018 ATLAS sTGC test beam and internal strip alignment of sTGC detectors 

  Carlson, Evan Michael (2019-07-16)

  Over the course of the next ten years, the LHC will undergo upgrades that will more than triple its current luminosity. This increase in luminosity will put greater demands on the ATLAS trigger system. To meet these demands, ...
• Design and evaluation of a Monte Carlo model of a low-cost kilovoltage x-ray arc therapy system 

  Breitkreutz, Dylan Yamabe (2019-06-28)

  There is a growing global need for proper access to radiation therapy. This need exists predominantly in low- and middle-income countries but exists in some high-income countries as well. The solution to this problem is ...
• The study and shielding of electromagnetic radiation from SuperKEKB electron and positron beam interactions 

  Beaulieu, Alexandre (2019-05-07)

  This project contributes to the research and development studies towards successful commissioning of the SuperKEKB electron-positron collider. This accelerator and storage rings complex aims at delivering the high-luminosity ...
• Microcomputed tomography dosimetry and image quality in preclinical image-guided radiation therapy 

  Johnstone, Christopher Daniel (2019-04-29)

  Motivated by the need to standardize preclinical imaging for image-guided radiation therapy (IGRT), we examine the parameters that influence microcomputed tomography (microCT) scans in the realm of image quality and absorbed ...
• Exploring energy extraction from Kerr magnetospheres 

  Taylor, Kate (2019-04-24)

  The aim of this thesis is to reconsider energy extraction from black hole magnetospheres, and more specifically the Blandford-Znajek (BZ) process from an effective field theory (EFT) perspective. Superradiant instabilities ...
• Gold nanoparticle uptake in synchronized cell populations and the effect on radiation sensitization 

  Rieck, Kristy (2019-04-16)

  To overcome the challenge in radiation therapy of delivering the prescribed dose to cancer cells while sparing normal tissue, preferential introduction of high Z material to tumour cells works as a method of radiation ...
• The baryonic matter and geometry of the local group 

  Tronrud, Thorold (2019-03-13)

  First, the baryonic content of simulated halos of virial masses between 5 x 10^{9} M_{\odot}$ to 5 x 10^{12} M_{\odot}$ in the APOSTLE project is examined in the context of the missing baryon problem. Baryonic particles ...
• Applications of x-ray computed tomography polymer gel dosimetry 

  Maynard, Evan David (2018-12-24)

  Radiation therapy, one of the most common forms of cancer treatment, is continually evolving with the introduction of new technology, more complex treatments and more advanced radiation dose calculations. To ensure the ...
• Nuclear star clusters in the Virgo Cluster of galaxies 

  Spengler, Chelsea (2018-11-23)

  It is readily accepted that many galaxies are inhabited by dense, compact objects deep in their centres, manifesting as supermassive black holes (SMBHs) and/or nuclear star clusters (NSCs). Their widespread presence and ...
• Near-infrared [Fe II] emission in starburst galaxies 

  Labrie, Kathleen (2018-11-16)

  We used the near-infrared [Fe II] emission line signature to detect supernova remnants (SNRs) in the nearby starburst galaxies NGC 1569, NGC 3738 and NGC 5253. The near-infrared narrow-band imaging program has led to the ...
• A measurement of the Tau to Muon branching ratio 

  Kormos, Laura Lee (2018-11-16)

  The Ƭ- → μ-vμvƬ branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B (Ƭ- → μ-vμvƬ) = 0.1734 ± 0.0009(stat) ± 0.0006(syst) has been ...
• The evolution of galaxies in the Hubble Deep Fields 

  Gwyn, Stephen Donald Jermy (2018-11-16)

  This thesis is a study of several aspects of the evolution of galaxies using photometric redshifts in the Hubble Deep Fields (HDF's). The photometric redshift method is used in the HDF's down to a magnitude limit of I = ...
• Search for excited charged leptons in electron-positron collisions 

  Vachon, Brigitte Marie Christine (2018-11-13)

  A search for evidence that fundamental particles are made of smaller subconstituents is performed. The existence of excited states of fundamental particles would be an unambiguous indication of their composite nature. ...

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