Sökning: "Electromagnetism"

Visar resultat 11 - 15 av 27 avhandlingar innehållade ordet Electromagnetism.

  1. 11. A Novel Signal Model and Estimation Method for Acoustic Doppler Current Meters

    Författare :Thomas L Lagö; Teknisk akustik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Doppler Profiler; Acoustic Doppler; Gaussian Backscattering Model; ADCM; ADCP; The Symmiktos Method; Estimation; Doppler; Current; MPCA.; Technological sciences; Teknik; Electromagnetism; optics; acoustics; Elektromagnetism; optik; akustik;

    Sammanfattning : This thesis deals with the process of estimating underwater current from the backscattering signal transmitted from an ultrasonic transducer. The narrowband sinusoidal burst signal is Doppler-shifted due to the current, and this information is converted into current. LÄS MER

  3. 12. Transmission Electron Microscopy of Semiconductor Nanowires

    Författare :Magnus Larsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanowires; magnetic resonance; supraconductors; magnetic and optical properties; electrical; Condensed matter:electronic structure; fasjämvikt; kristallografi; egenskaper termiska och mekaniska ; crystallography; phase equilibria; Kondenserade materiens egenskaper:struktur; akustik; Condensed matter:stucture; thermal and mechanical properties; optics; acoustics; Elektromagnetism; optik; Electromagnetism; Scanning Tunneling Microscopy; Nanomaterials; III-V Semiconductors; Transmission Electron Microscopy; Inorganic chemistry; Oorganisk kemi; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; egenskaper elektriska; magnetiska och optiska ; supraledare; magnetisk resonans; spektroskopi; materialteknik; Material technology; Materiallära; Semiconductory physics; Halvledarfysik;

    Sammanfattning : Semiconductor nanowires are studied by using transmission electron microscopy (TEM) based methods in this work. In the first section, the growth mechanism of gallium arsenide nanowires grown by chemical beam epitaxy is investigated. The nanowires are epitaxially grown from a gallium arsenide substrate by using gold seed particles as catalysts. LÄS MER

  4. 13. Radiant Textiles : Designing electromagnetic textile systems

    Författare :Erin Lewis; Tincuta Heinzel; Högskolan i Borås; []
    Nyckelord :HUMANIORA; HUMANITIES; smart textiles; electromagnetism; textile design; design methods; artistic research; Textiles and Fashion Design ; Textil och mode konstnärlig ;

    Sammanfattning : To regard the electromagnetic domain of conductive textiles is to unlock a realm of expressive possibilities. The underexplored area of the electromagnetic domain in con­ductive textiles implies that numerous computational and electronic textiles created thus far possess untapped capabilities. LÄS MER

  5. 14. Quantum Optics and Quantum Information Processing in Rare-Earth-Ion-Doped Crystals

    Författare :Nicklas Ohlsson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rare-earth ions; Optical processing; Optical storage; Electromagnetism; akustik; optik; Elektromagnetism; optics; acoustics; Photon echo; Quantum optics; Quantum computing; Fysicumarkivet A:2003:Ohlsson;

    Sammanfattning : In this thesis, aspects of the use of cryogenically cooled rare-earth-ion-doped crystals in the fields of quantum optics and quantum information processing are addressed. The experiments and theoretical considerations referred to in this thesis are based on the coherent transient interaction between light and the ions in the crystals. LÄS MER

  7. 15. Quantum computing with naturally trapped sub-nanometre-spaced ions

    Författare :Lars Rippe; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laserteknik; Laser technology; Atom- och molekylärfysik; Atomic and molecular physics; akustik; optik; Elektromagnetism; optics; acoustics; Electromagnetism; Fysik; Physics; entanglement; spectroscopy; rare-earth-metal-ion-doped crystals spectral hole-burning; inversion; excitation; laser stabilization; quantum computation; quantum gate;

    Sammanfattning : The main aim of this work, was to lay the foundations for the experimental realisation of a quantum mechanical controlled NOT gate in rare-earth-metal-ion-doped crystals. Small amounts of rare-earth elements, added during the growth of some inorganic crystals, will become substituted into the crystal lattice as trivalent ions. LÄS MER