Essays about: "kohn"

Showing result 6 - 10 of 10 essays containing the word kohn.

  1. 6. Basic quantisation rules of semiclassical analysis

    University essay from Uppsala universitet/Analys och sannolikhetsteori

    Author : Anders Israelsson; [2016]
    Keywords : Semiclassical analysis; Gårding inequality; Borel Theorem; Kohn-Nirenberg; Weyl; Quantization; Symbol; Asympotic expansion; Schwartz space; Tempered distribution; Pseudodifferential operator; Fourier transform; Stationary phase; Microlocal analysis; Oscillatory integral; Poisson Bracket; Lie Bracket;

    Abstract : Semiclassical analysis is the study of how to connect classical mechanics with quantummechanics in a mathematically rigorous way. What is crucial for quantum mechanics isthat the operators that occur are self-adjoint and map a subset of L2 into L2. This hasbeen proven in this thesis. READ MORE

  3. 7. Orbital-free Density-Functional Theory in a Finite Element Basis

    University essay from Linköpings universitet/Teoretisk Fysik

    Author : Joel Davidsson; [2015]
    Keywords : Orbital-free Density Functional Theory; Finite element method; Thomas-Fermi; nuclear cusp condition;

    Abstract : In this work, we have implemented an orbital-free density functional theory (OF-DFT) solver using the finite element method. In OF-DFT, the total ground state energy is minimized directly with respect to the electron density, rather than via orbitals like in the standard Kohn-Sham approach. READ MORE

  4. 8. Thermodynamic and electronic properties of niobium at finite temperatures

    University essay from Linköpings universitet/Teoretisk Fysik; Linköpings universitet/Tekniska fakulteten

    Author : Johan Tidholm; [2015]
    Keywords : Anharmonicity; Thermodynamic properties; Electronic properties; Niobium; Finite temperatures;

    Abstract : Niobium (Nb) is a fascinating element, that when it is in a solid state has remarkable properties. This is believed to be a result of its electronic configuration that has partially filled 4d and 5s sub-shells. Nb has a melting temperature of 2750 K, a high strength at high temperature, and a good wear resistance. READ MORE

  5. 9. Analytical and Numerical methods for a Mean curvature flow equation with applications to financial Mathematics and image processing

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Alireza Zavareh; [2012]
    Keywords : Mean curvature flow; Lie group analysis; Parabolic equation; Deterministic game theoretic;

    Abstract : This thesis provides an analytical and two numerical methods for solving a parabolic equation of two-dimensional mean curvature flow with some applications. In analytical method, this equation is solved by Lie group analysis method, and in numerical method, two algorithms are implemented in MATLAB for solving this equation. READ MORE

  6. 10. eProcurement: A Study of the Concept from the Point the Point of View of the Users and System Suppliers

    University essay from Ekonomiska institutionen

    Author : Jesper Domargård; Christofer Kohn; [2002]
    Keywords : Business and economics; eProcurement; procurement; procurement strategy; procurement process; electronic commerce; Ekonomi;

    Abstract : Background: The market for eProcurement is expected to increase from from US$ 3,6 miljarder to US$ 1.375 billions under the period 1999-2003. READ MORE