Sökning: "space weather"

Visar resultat 1 - 5 av 61 avhandlingar innehållade orden space weather.

  1. 1. Pre-biotic molecules and dynamics in the ionosphere of Titan a space weather station perspective

    Detta är en avhandling från Department of Physics and Astronomy

    Författare :Oleg Shebanits; Uppsala universitet.; Uppsala universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Saturn; Titan; Ionosphere; Langmuir Probe; Space and Plasma Physics; Rymd- och plasmafysik;

    Sammanfattning : Saturn’s largest moon Titan (2575 km radius) is the second largest in the Solar system. Titan is the only known moon with a fully developed nitrogen-rich atmosphere with ionosphere extending to ~2000 km altitude, hosting complex organic chemistry. LÄS MER

  2. 2. Space Weather Physics: Dynamic Neural Network Studies of Solar Wind-Magnetosphere Coupling

    Detta är en avhandling från Lund Observatory, Lund University

    Författare :Jian-Guo Wu; Lunds universitet.; Lund University.; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geophysics; kosmisk kemi; rymdvetenskap; Astronomi; cosmic chemistry; solar wind; space weather; magnetosphere; solar wind-magnetosphere coupling; geomagnetic activity; geomagnetic storms; predictions; modeling; neural networks; space research; Astronomy; physical oceanography; meteorology; Geofysik; fysisk oceanografi; meteorologi; Fysicumarkivet A:1997:Wu;

    Sammanfattning : This thesis presents studies of solar wind-magnetosphere coupling using dynamic neural networks in combination with statistically correlative analysis. The primary contribution of the thesis is dynamic neural network models that can be implemented for near real-time predictions of geomagnetic storms from the solar wind alone. LÄS MER

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

    Detta är en avhandling från Lund Observatory, Lund University

    Författare :Peter Wintoft; Lunds universitet.; Lund University.; [1997]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  4. 4. The Sun, Space Weather and Effects

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Magnus Wik; Lunds universitet.; Lund University.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; solar magnetism - solar indices - space weather - solar wind - solar dynamo - geomagnetic activity - wavelet analysis - neural networks - geomagnetically induced currents;

    Sammanfattning : The Sun and the solar magnetic activity is responsible for a variety of effects in space and on the Earth. High energy radiation and charged particles are constantly being emitted from the solar atmosphere interacting with our atmosphere and technological systems in space and on the ground. LÄS MER

  5. 5. Energy Transfer and Conversion in the Magnetosphere-Ionosphere System

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Lisa Rosenqvist; Uppsala universitet.; [2008]
    Nyckelord :Space and plasma physics; solar system; space physics; magnetospheric physics; plasma physics; magnetic storms; substorms; boundary layers; magnetic reconnection; energy conversion; space weather; Rymd- och plasmafysik;

    Sammanfattning : Magnetized planets, such as Earth, are strongly influenced by the solar wind. The Sun is very dynamic, releasing varying amounts of energy, resulting in a fluctuating energy and momentum exchange between the solar wind and planetary magnetospheres. LÄS MER