Essays about: "Cauchy surface"

Found 5 essays containing the words Cauchy surface.

  1. 1. Moderling Acoustic Transmission in Towed Array Sonars : Computations of the coupled acoustic and elastic wave equations

    University essay from KTH/Matematik (Avd.)

    Author : Bill Claesson; [2023]
    Keywords : ;

    Abstract : This thesis presents a method of solving the Helmholtz equation coupled with the Navier-Cauchy equation over a cross section of a Towed Array Sonar (TAS) modeled as a simplified cylindrical shell. The purpose of solving these equations is to estimate the transfer function of the pressure between the outside boundary and a position inside the TAS. READ MORE

  3. 2. Spacetime as a Hamiltonian Orbit and Geroch's Theorem on the Existence of Fermions

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Viktor Bergstedt; [2020]
    Keywords : 3 1; ADM; black hole; canonical quantization; Cauchy surface; causality; differential geometry; Einstein-Hilbert action; general relativity; Geroch; globally hyperbolic; Hamilton s equations; numerical relativity; parallelizable; SL 2; C ; spacetime; spinor; spin structure; SO 1; 3 ; Stiefel-Whitney class; tetrad; topology;

    Abstract : Over a century since its inception, general relativity continues to lie at the heart of some of the most researched topics in theoretical physics. It seems likely that the coveted solutions to problems like quantum gravity are to be found in an extension of general relativity, one which may only be visible in an alternate formulation of the theory. READ MORE

  4. 3. Study of the Optical Properties of sp2-Hybridized Boron Nitride

    University essay from Linköpings universitet/Tillämpad optik

    Author : Eduardo Antunez de Mayolo; [2014]
    Keywords : Spectroscopic ellipsometry; boron nitride; optical properties; materials characterization; III-V nitride semiconductors; cathodoluminescence; electron microscopy; Raman spectroscopy;

    Abstract : Nitride-based semiconductor materials make it possible to fabricate optoelectronic devices that operate in the whole electromagnetic range, since the band gaps of these compounds can be modified by doping. Among these materials, the sp2-hybridized boron nitride has properties that make it a potential candidate for integration in devices operating in the short-wavelength limit, under harsh environment conditions, due to the strength of the B-N bond. READ MORE

  5. 4. Modeling and Simulation of Urea Dosing System

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Zaki Ahmed; [2013]
    Keywords : Modeling; Simulation; Urea; Dosing;

    Abstract : To protect our health and environment from pollution, among others regulatory agencies in the European Union (EU) and legislation from the U.S. Environmental Protection Agency (EPA) has required that pollutants produced by diesel engines - such as nitrogen oxides (NOx), hydrocarbons (HC) and particulate matter (PM) - be reduced. READ MORE

  6. 5. Numerical Solution of a Nonlinear Inverse Heat Conduction Problem

    University essay from Matematiska institutionen; Linköpings universitet

    Author : Muhammad Anwar Hussain; [2010]
    Keywords : inverse problem; ill-posed; Cauchy problem; heat conduction; well-posed; nonlinear problem; spline derivative; spectral method.;

    Abstract :  The inverse heat conduction problem also frequently referred as the sideways heat equation, in short SHE, is considered as a mathematical model for a real application, where it is desirable for someone to determine the temperature on the surface of a body. Since the surface itself is inaccessible for measurements, one is restricted to use temperature data from the interior measurements. READ MORE