Now showing items 21-26 of 26

    • Singularity of the magnetic-field integral equation and its extraction 

      Gürel, L.; Ergül, Ö. (Institute of Electrical and Electronics Engineers, 2005)
      In the solution of the magnetic-field integral equation (MFIE) by the method of moments (MOM) on planar triangula-tions, singularities arise both in the inner integrals on the basis functions and also in the outer integrals ...
    • Solution of extremely large integral-equation problems 

      Ergül Ö.; Malas, T.; Gürel, L. (2007)
      We report the solution of extremely large integral-equation problems involving electromagnetic scattering from conducting bodies. By orchestrating diverse activities, such as the multilevel fast multipole algorithm, iterative ...
    • Solutions of large integral-equation problems with preconditioned MLFMA 

      Ergül, Ö.; Malas, T.; Ünal, A.; Gürel, L. (2007)
      We report the solution of the largest integral-equation problems in computational electromagnetics. We consider matrix equations obtained from the discretization of the integral-equation formulations that are solved ...
    • Spin filtering in a quantum ring with Rashba coupling 

      Tanatar, B.; Moldoveanu V. (2010)
      We study the effect of Rashba spin-orbit coupling on the spin interference in a non-interacting one-dimensional ring connected to two lead theoretically within the non-equilibrium Greens' function formalism. We compute the ...
    • Subband analysis for robust speech recognition in the presence of car noise 

      Çetin, A. E.; Yardımcı, Y.; Erzin, E. (IEEE (Institute of Electrical and Electronics Engineers), 1995)
      In this paper, a new set of speech feature representations for robust speech recognition in the presence of car noise are proposed. These parameters are based on subband analysis of the speech signal. Line Spectral Frequency ...
    • Transmission enhancement through deep subwavelength apertures using connected split ring resonators 

      Ates, D.; Cakmak, A.O.; Colak, E.; Zhao, R.; Soukoulis, C.M.; Ozbay, E. (Optical Society of American (OSA), 2010)
      We report astonishingly high transmission enhancement factors through a subwavelength aperture at microwave frequencies by placing connected split ring resonators in the vicinity of the aperture. We carried out numerical ...