Search for dissertations about: "geomagnetic field"

Showing result 11 - 15 of 34 swedish dissertations containing the words geomagnetic field.

  1. 11. Space Weather Physics, Prediction and classification of solar wind structures and geomagnetic activity using artificial neural networks

    University dissertation from Lund Observatory, Lund University

    Author : Peter Wintoft; [1997]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomi; cosmic chemistry; space research; Astronomy; solar magnetic fields; space weather; solar wind; magnesphere; artificial neural networks; geomagnetic activity; rymdvetenskap; kosmisk kemi; Fysicumarkivet A:1997:Wintoft;

    Abstract : This thesis concerns the application of artificial neural network techniques to space weather physics. The networks applied include multi-layer error-backpropagation, radial basis function, and self-organized maps. READ MORE

  2. 12. Investigations of temporal changes in climate and the geomagnetic field via high-resolution radiocarbon dating

    University dissertation from Department of Geology, Lund University

    Author : Anette Mellström; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; wiggle-matching; Radiocarbon dating; 14C; 2800 cal BP; climate change; solar activity; palaeomagnetism; lake sediments; varves; post-depositional remanent magnetisation; PDRM; lock-in; peat deposits; Sweden;

    Abstract : Geological archives have shown periods of abrupt climate change in the relatively stable Holocene epoch (last ca. 11 700 years). One of these periods was around 2800 cal BP. Several records, mainly from Europe, reveal a shift towards wetter, cooler and windier conditions. READ MORE

  3. 13. Theory and Applications of Tri-Axial Electromagnetic Field Measurements

    University dissertation from Uppsala : Institutionen för astronomi och rymdfysik

    Author : Roger Karlsson; Bo Thid'e; Tobia Carozzi; Gudmund Wannberg; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Space and plasma physics; polarisation; polarization; Stokes parameters; antenna; radio waves; whistler wave; SEE; direction-finding; statistics; Poynting theorem; Rymd- och plasmafysik; NATURAL SCIENCES Physics Geocosmophysics and plasma physics Space physics; NATURVETENSKAP Fysik Geokosmofysik och plasmafysik Rymdfysik;

    Abstract : Polarisation, which was first studied in optics, is a fundamental property of all electromagnetic fields. A convenient way to describe the polarisation of two dimensional electromagnetic fields is given by the Stokes parameters. This thesis deals with different aspects of wave polarisation and electromagnetic field measurements. READ MORE

  4. 14. O+ outflow during geomagnetic storms observed by Cluster satellites

    University dissertation from Luleå : Luleå University of Technology

    Author : Audrey Schillings; Hans Nilsson; Stephan Buchert; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Atmospheric science; Atmosfärsvetenskap;

    Abstract : The region of space dominated by the Sun's magnetic field is called the heliosphere. It envelops the entire solar system including Earth. Therefore, a strong coupling exists between the Sun and our planet. READ MORE

  5. 15. Space Weather - Solar magnetic variation and its impact on Earth's atmosphere

    University dissertation from Lund Observatory, Lund University

    Author : Fredrik Boberg; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; klimatologi; kartografi; pedology; Physical geography; marklära; geomorphology; climatology; cartography; space weather - solar magnetism - solar wind - geomagnetic activity- North Atlantic Oscillation - climate change - neural networks- wavelet analysis; Fysisk geografi; geomorfologi; Astronomy; space research; cosmic chemistry; Astronomi; rymdvetenskap; kosmisk kemi; Fysicumarkivet A:2003:Boberg;

    Abstract : A solar magnetic field is continuously being created in the solar interior. As the field evolves outward through the solar atmosphere and into the enveloping heliosphere, it causes effects on a wide range of temporal and spatial scales. READ MORE