Search for dissertations about: "geomagnetic activity"

Showing result 1 - 5 of 22 swedish dissertations containing the words geomagnetic activity.

  1. 1. Geomagnetic activity : periodic variations and connection to solar and interplanetary magnetic fields

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hans Hauska; Uppsala universitet.; [1972]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  2. 2. Solar Wind and Geomagnetic Activity - Predictions Using Neural Networks

    University dissertation from Lund Observatory, Lund University

    Author : Hans Gleisner; Lund University.; Lunds universitet.; [2000]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geophysics; kosmisk kemi; rymdvetenskap; magnetosphere; solar wind; space weather; geomagnetic activity; geomagnetism; ring current; auroral electrojet; neural networks; forecasting; Astronomy; space research; Astronomi; cosmic chemistry; physical oceanography; meteorology; Geofysik; fysisk oceanografi; meteorologi; Fysicumarkivet A:2000:Gleisner;

    Abstract : This thesis shows how artificial neural networks (ANNs) can be applied to predict geomagnetic activity from solar-wind data. It introduces and summarizes five papers where development of ANN models are reported, and where predictions of geomagnetic activity are discussed. READ MORE

  3. 3. 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; Lund University.; Lunds universitet.; [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

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

    University dissertation from Lund Observatory, Lund University

    Author : Jian-Guo Wu; Lund University.; Lunds universitet.; [1997]
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 5. Avian migration: the role of geomagnetic cues

    University dissertation from Stockholm : Department of Zoology, Stockholm University

    Author : Ian Henshaw; Stockholms universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; geomagnetic cues; orientation; food intake; fuel deposition; corticosterone; endogenous time program; bird migration; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; etologi; Ethology;

    Abstract : The regularity and scale of bird migrations has impressed mankind for generations. Birds rely on an inherited migratory program to guide them during the journey; however, recent evidence suggests that additional external cues are necessary. READ MORE