Search for dissertations about: "Horn’s"

Showing result 1 - 5 of 28 swedish dissertations containing the word Horn’s.

  2. 1. Hard horns for cluster-fed multi-beam antennas

    Author : Omid Sotoudeh; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : .... READ MORE

  4. 2. Single and dual band horns for multi-beam satellite antennas - application of artificially hard surfaces

    Author : Omid Sotoudeh; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multi-beam reflector antennas; Multi-mode hard horns;

    Abstract : The latest trend for the multimedia satellite systems is operation at the Ka-band, 17.7-20.2 GHz downlink and 27.5-30. READ MORE

  5. 3. On the Analysis of Horns, Reflectors, and Periodic Structures

    Author : Martin Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The design and manufacturing of a dual-frequency horn is presented. The dual-depth corrugated horn is fed by a circular and a coaxial waveguide, in the upper and lower frequency band, respectively. The reason for choosing a waveguide-only feeding network is discussed. READ MORE

  6. 4. Tensor Products of Highest Weight Representations and Skew-Symmetric Matrix Equations A+B+C=0

    Author : Ida Säfström; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Highest weight respresentation; tensor product decomposition; orthogonal algebra; skew-symmetric matrix; Horn’s conjecture; moment map; coadjoint orbit; flag manifold; general linear algebra; infinite dimensional unitary representation; general linear algebra;

    Abstract : The question of characterizing the eigenvalues for the sum of two Hermitian matrices, was solved in 1999, after almost a century of efforts. The saturation conjecture for GL_C(n) was proven by Knutson and Tao, filling in the last gap in Horn’s conjecture. READ MORE

  7. 5. A population-based study on neuropsychological and morphological signs of idiopathic normal pressure hydrocephalus

    Author : Otto Lilja-Lund; Lars Nyberg; Martin Maripuu; Katarina Laurell; Magnus Tisell; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; idiopathic normal pressure hydrocephalus; cognition; dual-task; ageing; temporal horns; morphology; memory; executive function; Neurology; neurologi;

    Abstract : BACKGROUND: Idiopathic normal pressure hydrocephalus (iNPH) is typically manifested in people over 65 years. The condition of gait disturbances, incontinence, and cognitive dysfunction can be reversed in up to 80% of the cases by ventricular shunting. READ MORE