Search for dissertations about: "time-dependent media"

Showing result 1 - 5 of 18 swedish dissertations containing the words time-dependent media.

  2. 1. Numerical modelling of time-dependent metamaterials with the FDTD method

    Author : Sergey Novozhilov; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; FDTD; time-dependent media; numerical modelling; computational electrodynamics; metamaterials;

    Abstract : Metamaterials are artificial materials, usually composed of so-called meta-atoms, with electromagnetic properties which cannot be found in naturally occurring materials. In this work we study the properties of time-dependent metamaterials (meaning that their electromagnetic properties are varying with time), as well as their potential applications. READ MORE

  4. 2. Time dependent flow around spherical particles and in porous media

    Author : Torbjörn Löfqvist; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

    Abstract : .... READ MORE

  5. 3. Transient waves in nonstationary media : with applications to lightning and nonlinear media

    Author : Ingegerd Åberg; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lightning; Klein-Gordon; nonlinear; characteristics; wave splitting; imbedding; sources; propagators; Green functions; direct and inverse scattering; Nonstationary; transient; high-frequency switching; Kerr.; Technological sciences; Teknik;

    Abstract : Propagation of transient waves in nonstationary, inhomogeneous, dispersive, stratified media is considered. Waves originating from sources exterior to the scatterer as well as from internal sources are treated. Algorithms are developed and illustrated by computations of wave phenomena in stationary, nonstationary and weakly nonlinear media. READ MORE

  6. 4. Metal release from powder particles in synthetic biological media

    Author : Klara Midander; Jinshan Pan; Mats Norell; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; metal release; stainless steel; Cu; powder particles; synthetic body fluids; test method; in vitro tests; Other materials science; Övrig teknisk materialvetenskap;

    Abstract : Humans are exposed to metals and metal-containing materials daily, either conscious, e.g. using metal tools or objects, or unconscious, e.g. READ MORE

  7. 5. Establishment Patterns of Model Diffusion Theory

    Author : Ia Williamsson; Linda Askenäs; Anders Hjalmarsson Jordanius; Antonios Tsertsidis; Anders Ingwald; Ida Lindgren; Linnéuniversitetet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Informatik; Information Systems;

    Abstract : Information technology is now part of almost every product and service, and the ever-increasing rate of technology and software development demands an appropriate software development process model. The model, whichdescribes the software development process, plays a crucial role for success in software projects. READ MORE