Sökning: "Elektromagnetism"

Visar resultat 21 - 25 av 28 avhandlingar innehållade ordet Elektromagnetism.

  1. 21. Protection of Complex Infrastructure Systems against Intentional Electromagnetic Interference

    Författare :Per Ängskog; Daniel Månsson; Per Näsman; Farhad Rachidi-Haeri; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; IEMI; CI; EMP; Critical Infrastructure; Electromagnetic Interference; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : In this thesis the effects of, and defense against, antagonistic attacks using Intentional Electromagnetic Interference (IEMI) are treated; especially when targeting infrastructure critical to society (CI).IEMI as a means to disturb or destroy electronic equipment draws its roots from military methods to interrupt or interfere with enemy activities. LÄS MER

  3. 22. Improving Parton Showers with Fixed Order Matrix Elements

    Författare :Stefan Prestel; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matrix Element Merging; Parton Shower; QCD; Phenomenology; Fysicumarkivet A:2013:Prestel;

    Sammanfattning : This thesis considers numerical simulations of high energy particle collisions, and improvements in the description of multiple collimated jets of hadrons in collision events in particular. In the event simulation software called event generators, the structure of multi-jet events is determined through an interplay of the input calculation, parton showers and phenomenological hadronisation models. LÄS MER

  4. 23. Multiscale Methods for Wave Propagation Problems

    Författare :Henrik Holst; Björn Engquist; Olof Runborg; Assyr Abdulle; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Simulations of wave propagation in heterogeneous media and at high frequencies are important in many applications such as seismic-, {electro-magnetic-,} acoustic-, fluid flow problems and others. These are classical multiscale problems and often too computationally expensive for direct numerical simulation. LÄS MER

  5. 24. A Study of Number-Ratio Fluctuations in Gold-Gold Interactions at sqrt(s_NN)=200 GeV

    Författare :Eva Haslum; Partikel- och kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fluctuations; Heavy-Ion Collisions; PHENIX; RHIC;

    Sammanfattning : The properties of the basic building blocks of nuclear matter, the quarks, and their interactions are not known in detail, largely because observations are complicated by the confinement of quarks in composite particles. New insights can be gained from the study of nuclear matter in a deconfined phase, like the form of matter that the Universe consited of early in its evolution according to the Big Bang theory. LÄS MER

  7. 25. Multiplet bases, recursion relations and full color parton showers

    Författare :Johan Thorén; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; QCD; Multiplet Bases; SU Nc ; SU N ; Recursion Relations; BCFW; Nc=3 Parton Showers; Parton Showers;

    Sammanfattning : The papers in this thesis all concern the treatment of colors in perturbative QCD, both in the context of hard scattering cross sections and for parton showers. The complexity of the color structure of QCD increases quickly with the number of external partons. LÄS MER