Search for dissertations about: "Lightning"

Showing result 16 - 20 of 66 swedish dissertations containing the word Lightning.

  2. 16. Analytic and Numerical Methods for the Solution of Electromagnetic Inverse Source Problems

    Author : Mikhail Popov; KTH; []
    Keywords : Inverse problem; inverse source problem; explicit identification; data continuation; global optimization; optimization approach; simulated annealing; genetic algorithm; non-destructive testing; lightning; return stroke model; explicit inversion; biom;

    Abstract : .... READ MORE

  4. 17. Transient Response of Grounding Systems Caused by Lightning: Modelling and Experiments

    Author : Yaqing Liu; Rajeev Thottappillil; Carlo Alberto Nucci; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Grounding system; Lightning protection; Electromagnetic Compatibility; Transient analysis; Soil ionization; Transmission line approach; Elektroteknik; Electrical engineering; Elektroteknik;

    Abstract : In order to achieve better lightning protection and electromagnetic compatibility (EMC) requirements, the needs for a proper grounding system and the knowledge of its transient behaviour become crucial. The present work is focused towards developing engineering models for transient analysis of grounding system with sufficient accuracy and simplicity for lightning studies. READ MORE

  5. 18. Features of the Electric Fields Generated by Lightning with Special Attention to Positive Ground Flashes

    Author : Dalina Johari; Vernon Cooray; Mahbubur Rahman; Fridolin Heidler; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; positive ground flashes; preliminary breakdown pulses; multiple-trains PBPs; positive leader; bidirectional leader; negative leader branch; subsequent return strokes; distant lightning; Engineering Science with specialization in Atmospheric Discharges; Teknisk fysik med inriktning mot atmosfäriska urladdningar;

    Abstract : This thesis focuses on the main processes in positive ground flashes and the distant lightning environment for both positive and negative ground flashes. It presents the characteristics of the preliminary breakdown pulses (PBPs), the characteristics of the electric field pulses observed during leader propagation, and the characteristics of the electric fields produced by the first and the subsequent return strokes. READ MORE

  6. 19. Optimum performance of lightning localization systems

    Author : Thorsten Schütte; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

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  7. 20. On the radiation from lightning flashes

    Author : Viktor Ščuka; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE