Sökning: "elliptical"

Visar resultat 16 - 20 av 66 avhandlingar innehållade ordet elliptical.

  1. 16. On the Scattering Reduction of an Aircraft Wing Profile Enclosing an Antenna

    Författare :Alireza Motevasselian; Lars Jonsson; Daniel Sjöberg; KTH; []
    Nyckelord :;

    Sammanfattning : In this thesis we study the radar cross section reduction and transparency of anantenna radome placed in the front part of an aircraft wing. The antenna, notstudied here, is a linearly polarized antenna operating at 1 GHz with abandwidth of 30%. LÄS MER

  3. 17. On Some Properties and Applications of Patterned Ferromagnetic Thin Films

    Författare :Pierre E. Roy; Peter Svedlindh; Per Nordblad; Jeffrey McCord; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; micromagnetics; vortex; spin dynamics; domains; MFM; microwave; patterned; permalloy; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : A microwave reflection method has been used to measure the spin excitations corresponding to the translational mode of magnetic vortices in samples containing either one or two vortices. Experimental findings are complemented by micromagnetic simulations. One-vortex systems are investigated in micron-sized circular and elliptical cylinders. LÄS MER

  4. 18. Adaptive tensor-based morphological filtering and analysis of 3D profile data

    Författare :Anders Landström; Cris Luengo; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : Image analysis methods for processing 3D profile data have been investigated and developed. These methods include; Image reconstruction by prioritized incremental normalized convolution, morphology-based crack detection for steel slabs, and adaptive morphology based on the local structure tensor. LÄS MER

  5. 19. A High Resolution Study of the LINER Galaxy NGC5218

    Författare :Evert Olsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Low Ionisation Nuclear Emission-line Regions (LINERs)are found in one third of the galaxies in the local bright galaxy population. The LINERs typically recide in the central parts of their host galaxies, and occur in early type elliptical galaxies as well as late type spiral galaxies. LÄS MER

  7. 20. Aided Derbforgaill "The violent death of Derbforgaill" : A critical edition with introduction, translation and textual notes

    Författare :Kicki Ingridsdotter; Gregory Toner; Tomás Ó Cathasaigh; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Early Irish; Old Irish; Middle Irish; medieval Irish; aideda; death-tales; Derbforgaill; critical edition; manuscript; Tochmarc Emire; Serglige Con Culainn; medieval Irish literature; Celtic languages; Keltiska språk; Celtic Languages; keltiska språk;

    Sammanfattning : This dissertation contains a critical edition of the early Irish tale Aided Derbforgaill “the violent death of Derbforgaill”. It includes an introduction discussing the main thematic components of the tale as well as intertextuality, transmission and manuscript relationship. LÄS MER