Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/260

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  • Conference Object
    Citation - WoS: 8
    Citation - Scopus: 8
    Dynamics of the D2+ni(100) Collision System: Analysis of the Reactive and Inelastic Channels
    (Wiley-blackwell, 2001) Böyükata, M; Güvenç, ZB; Jackson, B; Jellinek, J
    The reactive and scattering channels of the D(2)(v, j) + Ni(100) collision system are studied using quasiclassical molecular dynamics simulations. The interaction between the D(2) and the atoms of the surface is modeled by a LEPS (London-Eyring-Polani-Sato) potential energy function. The molecule is aimed at three different impact sites (atop, bridge, and center) of a rigid Ni(100) surface along the normal direction with various collision energies less than or equal to1.0 eV. Dissociative chemisorption probabilities are computed for different rotational states of the molecule. Probability distributions of the final rovibrational states of the ground-state Dp molecule scattered from those impact sites are also computed as a function of the collision energy. Higher collision energy results in excitation of higher rotational and/or vibrational states of the scattered molecule. At collision energies below 0.1 eV an indirect dissociation mechanism (through molecular adsorption) dominates the reaction. (C) 2001 John Wiley & Sons, Inc.
  • Article
    Citation - WoS: 11
    Citation - Scopus: 9
    Diffraction of Cylindrical Waves by a Perfectly Conducting Half-Screen: a Modified Theory of Physical Optics Solution
    (Wiley-blackwell, 2016) Umul, Yusuf Ziya; Ziya Umul, Yusuf
    The scattering problem of waves, radiated by a line source, is investigated by the method of modified theory of physical optics. The solution is obtained for both of the Dirichlet and Neumann boundary conditions. Two dimensional modified theory of physical optics integral is considered, since the problem is symmetric according to one of the spatial coordinates. The scattering integral is directly evaluated and a new function is defined for the scattered fields. The mathematical properties of the function are studied. The total, geometrical optics and diffracted waves are analyzed numerically. (C) 2016 Wiley Periodicals, Inc. View this article online at wileyonlinelibrary.com.
  • Article
    Citation - WoS: 7
    Citation - Scopus: 7
    Extension of the Maliuzhinets Solution for the Resistive Half-Plane
    (Wiley-blackwell, 2012) Umul, Yusuf Ziya
    The solution, put forward by Maliuzhinets for the impedance half-plane, is extended for the diffraction problem of plane waves by a resistive half-plane. With this aim, the Wiener-Hopf solution of the same problem is taken into account. The resultant diffracted field expression is compared with the Wiener-Hopf solution of the problem numerically. (C) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:777-780, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26626