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  • Botha, Johannes Rudolf (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: Recent years have seen a decline in the rate of space exploration due to the inefficiency of chemical rockets. Therefore alternative fuel efficient propulsion methods are being sought to enable cost ...
  • Weigel H.   Quandt M.   Graham N. (2011)
    We study the quantum stabilization of a cosmic string by a heavy fermion doublet in a reduced version of the standard model. We show that charged strings, obtained by populating fermionic bound state levels, become stable ...