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Yazar "Umul, Yusuf Ziya" için Mühendislik Fakültesi listeleme

Yazar "Umul, Yusuf Ziya" için Mühendislik Fakültesi listeleme

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  • A hybrid Maliuzhinets/PO method for diffraction problems by impedance wedges 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2011-09-01)
    The solution of Maliuzhinets of the diffraction problem of waves by an impedance wedge is transformed into a physical optics integral. The resultant expression is suitable for the investigation of various diffraction ...
  • A new approach to the Dirac equation 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    Dirac equation is based on a novel method that expresses the roots of a square-root operation in terms of matrices. Instead of this technique we propose an alternative approach. The square-root expression is represented ...
  • A new representation of the Kirchhoffs diffraction integral 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2013-03-15)
    The diffraction integral of Kirchhoff is rearranged according to its integral boundaries. The new approach is based on the theory of the edge dislocation waves and provides a more correct field representation for the ...
  • A new series solution associated with the quantum harmonic oscillator 
    Umul, Yusuf Ziya (2021-11)
    In the non-relativistic case, the problem of quantum harmonic oscillator is solved by the aid of the Schro spacing diaeresis dinger equation. An additional term of potential energy that is related with the square of the ...
  • A relativistic electron interacting with electromagnetic waves 
    Umul, Yusuf Ziya (2021-04)
    A relativistic electron, in an electromagnetic wave is studied. The relativistic energy-momentum relation is taken into consideration for the derivation of a wave equation for spin-1/2 particle. The electromagnetic wave ...
  • A survey of the new proposal about the photon momentum 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    Bahadoran et al. [1] proposed that the new approach to photon momentum, introduced by Umul [2], was not correct, because they obtained a negative energy expression for the absorbed photon. In this comment, we show that ...
  • A survey on Klein paradox 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    The solution of the relativistic tunneling problem with the aid of the Klein-Gordon and kinetic energy based wave equations are reviewed. The behaviors of the transmitted and reflected wave functions by the potential barrier ...
  • A uniform function for the diffraction of spherical waves 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    A function which occurs in the scattering problem of the spherical waves by a perfectly conducting half-plane is introduced for constructing the transition functions of the uniform theory of diffraction and uniform asymptotic ...
  • Airy-type relativistic matter wave 
    Umul, Yusuf Ziya (2021-12)
    A new relativistic Airy-type matter wave is introduced as a solution of the kinetic energy based wave equation. The parametric solution of the related differential equation is obtained. The total energy and momentum of the ...
  • Alternative interpretation of the edge-diffraction phenomenon 
    Umul, Yusuf Ziya (Optical Soc Amer, 2008-03)
    An alternative interpretation of the phenomenon of edge diffraction is proposed according to a new separation of the Fresnel function. The subfields are investigated in the problem of diffraction of a plane wave by a ...
  • Apertured paraxial Bessel beams 
    Umul, Yusuf Ziya (Optical Soc Amer, 2010-03)
    The paraxial Bessel beam is obtained by applying an approximation in the wavenumbers. The scattering of the beams by a circular aperture in an absorbing screen is investigated. The scattered fields are expressed in terms ...
  • Application of the complex point source method to the Schrodinger equation 
    Umul, Yusuf Ziya (Elsevier Science Ltd, 2010-11)
    The paraxial wave equation is a reduced form of the Helmholtz equation. Its solutions can be directly obtained from the solutions of the Helmholtz equation by using the method of complex point source. We applied the same ...
  • Application of the Method of Transition Boundary To the Half-Planes With Mixed Boundary Conditions 
    Umul, Yusuf Ziya (Elsevier GMBH, 2020-03)
    The scattering problems of waves by soft-hard and hard-soft half-planes are investigated by the method of transition boundary. The functional values at the transition boundaries are found to be identical to the ones for ...
  • Babinet's principle in the Fraunhofer diffraction by a finite thin wire 
    Umul, Yusuf Ziya (Elsevier GMBH, 2011)
    The scattered waves by a thin finite wire are evaluated by using the Rayleigh-Sommerfeld integral in the Fraunhofer approximation. The scattered fields by the complementary thin wire are also obtained with the aid of the ...
  • Babinet's principle in the Fraunhofer diffraction by a finite thin wire 
    Umul, Yusuf Ziya (Elsevier GMBH, 2011)
    The scattered waves by a thin finite wire are evaluated by using the Rayleigh-Sommerfeld integral in the Fraunhofer approximation. The scattered fields by the complementary thin wire are also obtained with the aid of the ...
  • Beam diffraction by a resistive half-plane 
    Umul, Yusuf Ziya (Optical Soc Amer, 2015-04-01)
    The scattering of a Gaussian beam by a resistive half-screen is investigated. Far-field approximation is used in evaluation of geometrical optics and diffracted waves. The uniform expression of the diffracted waves by the ...
  • Boundary diffraction wave theory approach to corner diffraction 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    The scattering process of plane waves by a discontinuous edge contour is studied with the three dimensional boundary diffraction wave theory. The edge and corner diffracted fields are obtained from the stationary phase and ...
  • Boundary diffraction wave theory of junctions between two surfaces with different face impedances 
    Umul, Yusuf Ziya (Elsevier Science Ltd, 2012-07)
    The line integral of the boundary diffraction wave theory is derived for the diffraction process of waves by a junction between two surfaces with different face impedances. The exact solution of Maliuzhinets is used with ...
  • Boundary diffraction wave theory of resistive surfaces with edge discontinuities 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2011-10-15)
    The line integral of the boundary diffraction wave theory is derived by considering the exact diffracted fields of a resistive half-plane. The line integral is generalized for arbitrary resistive surface with edge ...
  • Closed form series solution of the diffraction problem of plane waves by an impedance half-plane 
    Umul, Yusuf Ziya (IOP Publishing Ltd, 2009-04)
    The scattering problem of plane waves by an impedance half-plane is solved by using the method of separation of variables, and a closed form series expression, which separately reduces to the cases of soft and hard ...