DSpace@Çankaya

Başlık için Mühendislik Fakültesi listeleme

Başlık için Mühendislik Fakültesi listeleme

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  • 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 ...
  • Web Service-Based Turkish Automatic Speech Recognition Platform 
    Oyucu, Saadin; Polat, Hüseyin; Sever, Hayri (2020)
    In response to the similar challenges in building large-scale distributed applications and platforms on the Web, microservice architecture has emerged and gained a lot of popularity in recent years. Therefore, both for the ...
  • Wedge diffraction in terms of the method of physical optics 
    Umul, Yusuf Ziya (IEICE-INTS Electronics Express, 2009-01-10)
    The method of physical optics is extended for wedge diffraction. The classical integral of physical optics is taken into account for the diffraction problem of plane waves by a conducting half-plane. The integral is ...
  • Wedge diffraction model in gravitational lensing by cosmic strings 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-03)
    A cosmic string forms a conical topology, which enables a diffraction phenomenon by a wedge with an inner angle, equals to the double of the deficit angle. A wedge, on the edge of which the string is located, is defined ...
  • Weighted embedded zero tree for scalable video compression 
    Choupani, Roya; Wong, Stephan; Tolun, Mehmet R. (2008)
    Video streaming over the Internet has gained popularity during recent years mainly due to the revival of videoconferencing and videotelephony applications and the proliferation of (video) content providers. However, the ...
  • Wetting behavior and reaction layer formation in C/SiC composite-titanium alloy joints 
    Saltik, Simge; Esen, Ziya; Dericioglu, Arcan F. (2022)
    The present study investigates the effect of brazing parameters on reaction layer formation, and mechanical properties of C/SiC composite-Ti6Al4V alloy joints produced by brazing technique. The wetting mechanism of the ...
  • What We Know And What We Do Not Know About DMN 
    Figl, Kathrin; Mendling, Jan; Tokdemir, Gül; Vanthienen, Jan (German Informatics SOC-GI, 2018)
    The recent Decision Model and Notation (DMN) establishes business decisions as first-class citizens of executable business processes. This research note has two objectives: first, to describe DMN's technical and theoretical ...
  • Wide bandpass and narrow bandstop microstrip filters based on hilbert fractal geometry: design and simulation results 
    Mezaal, Yaqeen S.; Eyyuboğlu, Halil T.; Ali, Jawad K. (Public Library Science, 2014-12-23)
    This paper presents new Wide Bandpass Filter (WBPF) and Narrow Bandstop Filter (NBSF) incorporating two microstrip resonators, each resonator is based on 2nd iteration of Hilbert fractal geometry. The type of filter as ...
  • Wideband hexagonal type antenna design for 5g networks 
    Yıldıran, Orçun; Başdemir, Hüsnü Deniz (IEEE, 2017)
    In this paper, hexagonal type antenna for the next generation (5G) mobile networks is proposed. Both the microstrip feed line and coaxial feed techniques are used to feed the antenna. The best feed point location for both ...