DSpace@Çankaya

Başlık için Mühendislik Fakültesi listeleme

Başlık için Mühendislik Fakültesi listeleme

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  • Wave diffraction by a conductive half-plane between two different media 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    The scattering of waves by a conductive half-screen, which reflects some portion of the incident energy and transmits the remaining part, between two media with different electromagnetic properties is investigated. First ...
  • Wave diffraction by a half-plane for grazing incidence 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-03)
    The diffracted wave, related with a half-plane on which the total field satisfies the Dirichlet boundary condition, becomes zero when the angle of incidence of the incident wave is equal to zero according to the solution ...
  • Wave diffraction by a half-screen with Nth order generalized sheet transition conditions 
    Umul, Yusuf Ziya (Elsevier GMBH, Urban & Fischer Verlag, 2019)
    The scattering of plane waves by a half-plane with Nth order transition conditions is investigated. First of all, the reflection and transmission conditions of the transmissive surface are evaluated by using the generalized ...
  • Wave diffraction by a metallic half-plane 
    Umul, Yusuf Ziya (Elsevier GMBH, 2016)
    The scattering problem of plane waves by a half-screen with different face impedance is obtained with a geometrical optics-physical optics based method. The kernel of the physical optics integral is redefined by using ...
  • Wave diffraction by a perfect electromagnetic conductor wedge 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019-04)
    The scattering of plane electromagnetic waves by a perfect electromagnetic conductor wedge is investigated. The diffraction coefficient of the wedge is obtained by considering the structure of the scattered waves by a whole ...
  • Wave diffraction by a perfect magnetic conductor half-plane between free space and anisotropic plasma 
    Umul, Yusuf Ziya (2020-12)
    The diffraction of magnetic polarized electromagnetic plane waves by a perfect magnetic conductor half-screen, located between free space and anisotropic plasma, is studied. The method of transition boundary is used for ...
  • Wave diffraction by a reflectionless half-plane 
    Umul, Yusuf Ziya (Optical Soc Amer, 2017-11-20)
    The concept of reflectionless surface is put forth, and its reflection and transmission coefficients are determined by using the scattered geometrical optics fields of transmissive and perfectly electric conducting surfaces. ...
  • Wave diffraction by a right-angled interface between resistive half and whole planes 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-02)
    The interaction phenomenon of electromagnetic plane waves by a right angled interface between whole and half screens with different resistivities is studied. The construction, under examination, is considered in order to ...
  • Wave diffraction by a soft/hard strip: Modified theory of physical optics solution 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-03)
    The scattering problem of waves by a strip, the faces of which are composed of soft and hard surfaces, is investigated by the method of modified theory of physical optics. The scattering integral is divided into two parts ...
  • Wave diffraction by a thin lossy dielectric half-plane 
    Umul, Yusuf Ziya (2021-10)
    The scattering of electromagnetic waves by a thin lossy dielectric half-plane is investigated. With this aim, the interaction process of waves with a dielectric layer is studied. The reflection and transmission coefficients ...
  • Wave diffraction by an impedance wedge 
    Umul, Yusuf Ziya (2020-03)
    A new diffraction field expression is proposed for a wedge with different face impedances. The modified theory of physical optics based diffraction coefficient is taken into account. The reflection coefficients are expressed ...
  • Wave diffraction by material half-planes 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    The diffraction of E-polarized electromagnetic waves by resistive and conductive half planes is studied. The solution of Maliuzhinets for the scattering problem of plane waves from an impedance half-screen is taken into ...
  • Wave diffraction by material half-planes 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    The diffraction of E-polarized electromagnetic waves by resistive and conductive half planes is studied. The solution of Maliuzhinets for the scattering problem of plane waves from an impedance half-screen is taken into ...
  • Wave diffraction by the junction between resistive and soft-hard half-screens 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    The scattering process of planes waves by a junction between resistive and soft/hard half-planes is investigated. First of all, the initial and total geometrical optics fields are determined by considering the related ...
  • Wave interaction with a perfect electromagnetic conductor half plane between two dissimilar media 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    The interaction of electromagnetic plane wave by a perfect electromagnetic conductor half-plane, located between two media with different electromagnetic properties, is investigated. The diffracted waves, related with the ...
  • Wave structure function and spatial coherence radius of plane and spherical waves propagating through oceanic turbulence 
    Lu, Lu; Ji, Xiaoling; Baykal, Yahya (Optical Soc Amer, 2014-11-03)
    The analytical formulae for the wave structure functions (WSF) and the spatial coherence radius of plane and spherical waves propagating through oceanic turbulence are derived. It is found that the Kolmogorov five-thirds ...
  • Wavelet based flame detection using differential PIR sensors 
    Erden, F.; Töreyin, Behçet Uğur; Soyer, E. B.; İnaç, İ.; Günay, O.; Köse, K.; Çetin, A. Enis (IEEE, 2012)
    In this paper, a flame detection system using a differential Pyro-electric Infrared (PIR) sensor is proposed. A differential PIR sensor is only sensitive to sudden temperature variations within its viewing range and it ...
  • Wavelet based flickering flame detector using differential PIR sensors 
    Erden, Fatih; Töreyin, Behçet Uğur; Soyer, E.Birey; İnaç, İhsan; Günay, Osman; Köse, Kıvanç; Çetin, A. Enis (Elsevier Science LTD, 2012-10)
    A Pyro-electric Infrared (FIR) sensor based flame detection system is proposed using a Markovian decision algorithm. A differential PIR sensor is only sensitive to sudden temperature variations within its viewing range and ...
  • Weather data analysis and sensor fault detection using an extended ıot framework with semantics, big data, and machine learning 
    Önal, Aras Can Sezer, Ömer Berat; Doğdu, Erdoğan; Özbayoğlu, Murat; Önal, Aras Can (IEEE, 2017)
    In recent years, big data and Internet of Things (IoT) implementations started getting more attention. Researchers focused on developing big data analytics solutions using machine learning models. Machine learning is a ...
  • Web application based on MVC laravel architecture for online shops 
    Mahmood, Mohammed Thakir; Ashour, Osama Ibraheem Ashour (2020)
    Working with traditional methods to develop a web application has great limitations, is very time-consuming and can lead to a number of unexpected errors. Therefore, a new technology, namely MVC pattern frameworks, was ...