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Filtering by: Creator Maxwell, Joseph R. Remove constraint Creator: Maxwell, Joseph R. Committee Member Jansen, Henri Remove constraint Committee Member: Jansen, Henri

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  • Modeling Flow and Transport at Pore Scale with Obstructions

    Creator:
    Umhoefer, Joseph G.
    Abstract:
    In this thesis we study mathematical and computational models for phenomena of flow and transport in porous media in the presence of changing pore scale geometries. The differential equations for the flow and transport models at Darcy scale involve the coefficients of permeability, porosity, and tortuosity which depend on the...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE THESIS OF Joseph G. Umhoefer for the

  • Investigation of a hybrid quasi-diffusion/Monte Carlo method for solving multigroup criticality problems in slab geometry

    Creator:
    Robinson, Bethany R.
    Abstract:
    A hybrid Quasi-diffusion/Monte Carlo Method for solving multigroup criticality problems in slab geometry was investigated. Analog Monte Carlo was used to calculate functionals (Eddington Factors) that were then used in solution of the quasi-diffusion equations. The hybrid method was shown to accurately and precisely predict the k-eigenvalue and fission source...
    Resource Type:
    Masters Thesis
    Full Text:
    Bethany R. Robinson June 8, 2011 All Rights Reserved Investigation of a Hybrid Quasi-diffusion/Monte

  • Extending the clinical applications of commercially available optically stimulated luminescence (OSL) dosimeters

    Creator:
    Keller, James R.
    Abstract:
    We present the results of our experiments designed to extend the clinical applications of commercially available Optically Stimulated Luminescence (OSL) Dosimeters. Our initial experiments demonstrate the linear response of the OSL dosimeters for doses under 200 cGy and the non-linear response of the device after 200 cGy. Our experiments show...
    Resource Type:
    Dissertation
    Full Text:
    R. Keller for the degree of Doctor of Philosophy in Medical Physics presented on June 3, 2013

  • Virtual Element Methods for Magnetohydrodynamics on General Polygonal and Polyhedral Meshes

    Creator:
    Naranjo, Sebastián
    Abstract:
    The aim of this dissertation is to construct a virtual element method (VEM) for models in magneto-hydrodynamics (MHD), an area that studies the behavior and properties of electrically conducting fluids such as a plasma. MHD models are a coupling of the Maxwell’s equations for electromagnetics and models for fluid flow....
    Resource Type:
    Dissertation
    Full Text:
    detail will be clear from context. For a pair of sufficiently regular real-valued functions f, g : U → R

  • Computational nanooptics in hyperbolic metamaterials and plasmonic structures

    Creator:
    Thongrattanasiri, Sukosin
    Abstract:
    This dissertation concerns several problems in the fields of light interaction with nanostructured media, metamaterials, and plasmonics. We present a technique capable of extending operational bandwidth of hyperbolic metamaterials based on interleaved highly-doped InGaAs and undoped AlInAs multilayer stacks. The experimental results confirm theoretical predictions, exhibiting broadband negative refraction response...
    Resource Type:
    Dissertation
    Full Text:
    . Maxwell Garnett, where optical properties of a medium containing minute metallic spheres were examined

  • Electromagnetic properties of anisotropic plasmonic metamaterials

    Creator:
    Elser, Justin Lee
    Abstract:
    In this dissertation we study the electromagnetic properties of plasmonic metamaterials. We develop an analytical description to solve the fundamental problem of free-space scattering in planar plasmonic systems by utilizing anisotropic metamaterials. We show with exact numerical simulations that these manufactured materials do completely eliminate the scattering, and even in...
    Resource Type:
    Dissertation
    Full Text:
    expansion ~E(~r, t) ∝ ∑ A,kx,ky ~EA(kx, ky)e ikxx+ikyy+ikzz−iωt (1.1) where the z axis coincides with

  • A motor-generator and supercapacitor based system for microgrid frequency stabilization

    Creator:
    Crispo, Richard F.
    Abstract:
    This research introduces an energy storage system to deliver microgrid frequency response. A doubly-fed induction generator (DFIG) and a squirrel cage induction machine (SCIM) are coupled together as a motor/generator set to deliver an immediate inertial response to a change of frequency, and an inverter and supercapacitors deliver short term...
    Resource Type:
    Masters Thesis
    Full Text:
    Figure 3. SCIMDFIG uGrid ~ DC Current S ta to r Rotor AC/DC DC/DC Inverter SuperCap Bank

  • Terahertz Induced Non-linear Electron Dynamics in Nanoantenna Coated Semiconductors at the Sub-picosecond Timescale

    Creator:
    Stickel, Andrew
    Abstract:
    This dissertation is an exploration of the material response to Terahertz (THz) radiation. Specifically we will explore the ultrafast electron dynamics in the nonperturbative regime in semiconductors that have been patterned with nanoantenna arrays using broadband, high intensity, THz radiation. Three main semiconductor materials will be studied in this work....
    Resource Type:
    Dissertation
    Full Text:
    ) and strained (R state) V 3d states. B) A representation of the V 3d|| states superimposed of a section

  • Creating Community: A Case Study of Students’ Experiences in Inquiry-Based Learning

    Creator:
    Schaub, Branwen
    Abstract:
    We now have broad consensus in the mathematics education research community that active, inquiry-based classrooms provide a wealth of learning benefits for students (Freeman et al., 2014; Laursen et al., 2014; Theobald et al., 2020). Classrooms that utilize inquiry throughout the entire structure of the course, as opposed to the...
    Resource Type:
    Dissertation
    Full Text:
    , Okanogan, Moses-Columbia, Wenatchi, Entiat, Chelan, Methow, Nespelem, San Poli, Chief Joseph Band of Nez

  • Sub-diffraction light propagation and imaging in planar negative refraction waveguides

    Creator:
    Wangberg, Robyn
    Abstract:
    In this dissertation we study the electromagnetic properties of planar waveguides with non-magnetic strongly anisotropic dielectric cores. We develop an analytical description of the mode propagation in these systems and show that the index of refraction can be either positive or negative depending on the specific material parameters. Propagating modes...
    Resource Type:
    Dissertation
    Full Text:
    wave equation, ∇2 �E(�r, t) = �µ c2 ∂2 �E(�r, t) ∂t2 , (2.5) where c = 2.9979 × 1010cm/s is the