Now showing items 15252-15271 of 15672

    • Variation in powder size distribution for electron beam melting of Ti48Al2Cr2Nb - density and surface roughness effects 

      Oluwajuyigbe, Tomisin (University of Waterloo, 2024-04-25)
      Additive manufacturing (AM), also known as 3D printing, is an innovative method for producing complex geometries with minimal material waste. Aerospace, medical, and battery fields are a few sectors that employ AM as a ...
    • Variation of Force Amplitude and its Effects on Muscle Fatigue 

      Yung, Marcus (University of Waterloo, 2011-01-20)
      Current trends in industry are leaning towards specialized production systems and sedentary computer work tasks that are associated with low and less varying mechanical exposures. It has been suggested that physical ...
    • Variational Bayesian Learning and its Applications 

      Zhao, Hui (University of Waterloo, 2014-01-03)
      This dissertation is devoted to studying a fast and analytic approximation method, called the variational Bayesian (VB) method, and aims to give insight into its general applicability and usefulness, and explore its ...
    • Variational Inference for Text Generation: Improving the Posterior 

      Balasubramanian, Vikash (University of Waterloo, 2020-08-10)
      Learning useful representations of data is a crucial task in machine learning with wide ranging applications. In this thesis we explore improving representations of models based on variational inference by improving the ...
    • Variational Quantum Eigensolvers Applied to Problems in High Energy Physics 

      Ferguson, Ryan (University of Waterloo, 2021-01-13)
      Variational methods have long been used to study strongly-correlated quantum systems. Despite the successes of classical protocols, these are limited in the study of quantum systems, either due to numerical errors like the ...
    • Variational Spectral Analysis 

      Sendov, Hristo (University of Waterloo, 2000)
      We present results on smooth and nonsmooth variational properties of {it symmetric} functions of the eigenvalues of a real symmetric matrix argument, as well as {it absolutely symmetric} functions of the singular values ...
    • Variational Stokes with Polynomial Reduced Fluid Model 

      Panuelos, Jonathan (University of Waterloo, 2021-01-21)
      Standard fluid simulators often apply operator splitting to independently solve for pressure and viscous stresses. This decoupling, however, induces incorrect free surface boundary conditions. Such methods are unable to ...
    • Variations and Sources of Atmospheric CO2 Measured at East Trout Lake, Canada 

      Kim, Myung (University of Waterloo, 2016-01-15)
      Reducing uncertainties in projections of surface emissions of major greenhouse gases (GHGs) including CO2 relies on continuously improving our scientific understanding of the exchange processes between the atmosphere and ...
    • Variations in Northern Dolly Varden (Salvelinus malma malma) total mercury concentrations from the northwestern Canadian Arctic 

      Tran, Lilian (University of Waterloo, 2014-10-22)
      Mercury (Hg) is a ubiquitous contaminant with harmful impacts on the aquatic ecosystem as well as human health. Studies to date of the bioaccumulative effects of Hg on northern fishes have focussed on all but one of the ...
    • Variations on a Theme of Deep Time: From Geology to Architecture 

      Winter, Mathew Jeffrey Franklin (University of Waterloo, 2015-08-27)
      Through the lens of deep time, this thesis draws a comparison between geology and architecture, to create an architecture of simultaneity. Using Henri Bergson’s notion of the present containing all of the past within it, ...
    • Variations on a Theme: Graph Homomorphisms 

      Roberson, David E. (University of Waterloo, 2013-08-30)
      This thesis investigates three areas of the theory of graph homomorphisms: cores of graphs, the homomorphism order, and quantum homomorphisms. A core of a graph X is a vertex minimal subgraph to which X admits a ...
    • Variations on Acoustophoretic Microchannels: From the Facile to the Highly Capable 

      Samarasekera, Champika (University of Waterloo, 2018-05-31)
      The lab-on-a-chip toolkit is replete with techniques for microparticle manipulation. The use of ultrasonic waves to impart forces on particles, referred to as acoustophoresis, is one particularly powerful yet gentle option. ...
    • Variations on PIGS: Non-standard approaches for imaginary-time path integrals 

      Iouchtchenko, Dmitri (University of Waterloo, 2015-08-21)
      The second Rényi entropy has been used as a measure of entanglement in various model systems, including those on a lattice and in the continuum. The present work focuses on extending the existing ideas to measurement of ...
    • Variations on the Erdos Discrepancy Problem 

      Leong, Alexander (University of Waterloo, 2012-01-04)
      The Erdős discrepancy problem asks, "Does there exist a sequence t = {t_i}_{1≤i<∞} with each t_i ∈ {-1,1} and a constant c such that |∑_{1≤i≤n} t_{id}| ≤ c for all n,c ∈ ℕ = {1,2,3,...}?" The discrepancy of t equals ...
    • Variations on the Theme of Caching 

      Gaspar, Cristian (University of Waterloo, 2005)
      This thesis is concerned with caching algorithms. We investigate three variations of the caching problem: web caching in the Torng framework, relative competitiveness and caching with request reordering. <br /><br /> ...
    • Various aspects of single bacterial cell: from encapsulating nanoparticle, cell patterning and studying gene expression 

      Seo, Brandon(BumSok) (University of Waterloo, 2016-11-15)
      Behaviour of single bacterium have been mysterious for many years due to the technical difficulty and nature of bacteria forming communities. It has not been long since engineers and scientists have started to develop ...
    • Vascular Aging: Influences on cerebral blood flow and executive function 

      Robertson, Andrew Donald (University of Waterloo, 2007-09-17)
      An age-related decline in cerebral blood flow (CBF) is widely acknowledged. However, uncertainty exists as to whether this reduction is the result of a reduced metabolic demand (cerebral atrophy) or an impaired delivery ...
    • Vector Bundles on Non-Kähler Elliptic Surfaces 

      Boulter, Eric (University of Waterloo, 2023-04-20)
      This thesis studies two problems relating to moduli spaces of vector bundles on non-Kähler elliptic surfaces. The first project involves the holomorphic symplectic structure on smooth and compact moduli spaces of sheaves ...
    • Vector Graphics for Real-time 3D Rendering 

      Qin, Zheng (University of Waterloo, 2009-01-27)
      Algorithms are presented that enable the use of vector graphics representations of images in texture maps for 3D real time rendering. Vector graphics images are resolution independent and can be zoomed arbitrarily ...
    • Vegetation Based Assessment of Wetland Condition in the Prairie Pothole Region 

      Bolding, Matthew (University of Waterloo, 2018-01-22)
      The northern prairie pothole region (NPPR) in central and southern Alberta contains numerous shallow, open-water pothole wetlands that provide important ecosystem services to the region, such as flood mitigation. To address ...


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