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Browsing Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering by Issue Date

Browsing Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering by Issue Date

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  • Design of RSFQ wave pipelined Kogge-Stone Adder and developing custom compound gates 
    Ozer, M.; Celik, M. Eren; Tukel, Y.; Bozbey, Ali (Elsevier Sci Ltd, 2014)
    Since the invention of computers, the calculation of arithmetic and logic operations using digital circuits has been one of the leading problems in processor designs. The challenge has been to compute more operations with ...
  • Theoretical and experimental investigations of asymmetric light transport in graded index photonic crystal waveguides 
    Giden, I.H.;  Yilmaz, D.;  Turduev, M.; Kurt, Hamza;  Çolak, E.;  Ozbay, E. (2014-01)
    To provide asymmetric propagation of light, we propose a graded index photonic crystal (GRIN PC) based waveguide configuration that is formed by introducing line and point defects as well as intentional perturbations inside ...
  • Influence of excitation frequency on structural and electrical properties of spray pyrolyzed CuInS2 thin films 
    Sankır, Nurdan Demirci; Aydın, Erkan; Sankır, Mehmet; Bozbey, Ali (Elsevier Science Sa, 2014-06)
    This paper reports the cost effective deposition of the copper indium sulfide (CuInS2) thin films under atmospheric conditions via ultrasonic spray pyrolysis. Structural and electrical properties of these films have been ...
  • Diversity Analysis of Hierarchical Modulation in Wireless Relay Networks 
    Yalcyn, Ahmet Zahid; Yüksel, Melda (IEEE-Inst Electrical Electronics Engineers Inc, 2014-07)
    In communication systems, hierarchical modulation is used to increase system robustness and to send different information flows simultaneously. However, when used in cooperative communication systems, hierarchical modulation ...
  • Design and Optimization of Fully Digital SQUID Based on Bi-Directional RSFQ 
    Foroughi, Farshad; Bozbey, Ali; Fardmanesh, Mehdi (Springer, 2014-07)
    Bi-directional RSFQ benefits from using both positive and negative SFQ pulses to manipulate and transfer digital data. This allows more flexibility in the design of simpler circuits with enhanced performance. On the other ...
  • Dual polarized broadband and all dielectric partial cloaking using stacked graded index structures 
    Oner, B.B.;  Can, M.G.;  Kurt, Hamza (Optical Society Of American (OSA), 2014-08)
    We propose broadband one-dimensional optical cloaking design based on isotropic and purely dielectric non-absorbent materials. The photonic structures are formed by utilizing graded index (GRIN) concept in stacked form. ...
  • Photonic Nanojet Analysis by Spectral Element Method 
    Mahariq, I.;  Kuzuoğlu, M.;  Tarman, I.H.;  Kurt, Hamza (Institute Of Electrical And Electronics Engineers Inc., 2014-09)
    Although it is known that the spectral element method (SEM) has both high accuracy and a lower computational cost when compared with finite-element or finite-difference methods, the SEM is not widely utilized in the modeling ...
  • Reduced symmetry and analogy to chirality in periodic dielectric media 
    Giden, I.H.;  Turduev, M.;  Kurt, Hamza (Springer, 2014-09)
    Much attention has been paid to photonic applications based on periodic media. Meanwhile, quasi-periodic and disordered mediahave extended the research domain and provided additional novelties for manipulating and controlling ...
  • Graded index optical microresonators: analytical and numerical analyses 
    Dadashi, Khalil; Kurt, Hamza; Ustun, Kadir; Esen, Ramazan (Optical Soc Amer, 2014-09)
    It is known that the spectra of optical modes supported by microresonators are shape and size dependent. We have introduced an additional parameter, i.e., spatially varying refractive index, to tailor the spectra of optical ...
  • Multiple slow waves and relevant transverse transmission and confinement in chirped photonic crystals 
    Serebryannikov, Andriy E.; Cakmak, A. Ozgur; Colak, Evrim; Caglayan, Humeyra; Kurt, Hamza; Ozbay, Ekmel (Optical Soc Amer, 2014-09-08)
    The dispersion properties of rod-type chirped photonic crystals (PhCs) and non-channeled transmission in the direction of the variation of structural parameters from one cell of such a PhC to another are studied. Two types ...
  • The Impact of Transmission Power Control Strategies on Lifetime of Wireless Sensor Networks 
    Cotuk, Huseyin; Bıçakçı, Kemal; Tavlı, Bülent; Uzun, Erkam (IEEE Computer Soc., 2014-11)
    Transmission power control has paramount importance in the design of energy-efficient wireless sensor networks (WSNs). In this paper, we systematically explore the effects of various transmission power control strategies ...
  • Role of Unidirectionality and Reverse Path Length on Wireless Sensor Network Lifetime 
    Batmaz, Anil Ufuk; Yildiz, Huseyin Ugur; Tavlı, Bülent (IEEE-Inst Electrical Electronics Engineers Inc, 2014-11)
    Transceiver characteristics, asymmetric interference, and various properties of electromagnetic propagation environment create unidirectional links in wireless sensor networks (WSNs), especially in extreme environments. ...
  • Transmission strategies and resource allocation for fading broadcast relay channels 
    Isikman, Arif Onder; Yüksel, Melda (Elsevier Gmbh, Urban & Fischer Verlag, 2015)
    In this paper the broadcast relay channel, where the source communicates with multiple destinations with the help of a single relay is studied. Five different transmission protocols, direct transmission, multihop (MH), ...
  • Method of implementing graded index media by symmetry-reduced helical photonic structures 
    Giden, I.H.;  Rezaei, B.;  Kurt, Hamza (OSA - The Optical Society, 2015)
    We propose a new approach for the realization of a graded index (GRIN) medium using a symmetry reduced unit element in photonic crystals. An index gradient on the order of ?n = 0.16 is achieved without modifying the filling ...
  • OFDMA-based multicast with multiple base stations 
    Kazez, Ahmet Cihat; Girici, Tolga (Tubitak Scientific & Technical Research Council Turkey, 2015)
    We consider an orthogonal frequency division multiple access (OFDMA)-based multicast system where multiple base stations transmit a multicast session to a multicast group. The goal is to maximize the multicast rate (i.e. ...
  • Optimal data compression for lifetime maximization in wireless sensor networks operating in stealth mode 
    Incebacak, Davut; Zilan, Ruken; Tavlı, Bülent; Barcelo-Ordinas, Jose M.; Garcia-Vidal, Jorge (Elsevier Science Bv, 2015-01)
    Contextual privacy in Wireless Sensor Networks (WSNs) is concerned with protecting contextual information such as whether, when, and where the data is collected. In this context, hiding the existence of a WSN from adversaries ...
  • Approximate Fourier Domain Expression for Bloch-Siegert Shift 
    Turk, Esra Abaci; Ider, Yusuf Ziya; Ergün, Arif Şanlı; Atalar, Ergin (Wiley-Blackwell, 2015-01)
    PurposeIn this study, a new simple Fourier domain-based analytical expression for the Bloch-Siegert (BS) shift-based B-1 mapping method is proposed to obtain vertical bar b(1)(+)vertical bar more accurately while using ...
  • Polarization-Independent Photonic Crystal Fabry-Perot Cavity 
    Can, Melih Goktug; Oner, Bilgehan Baris; Kurt, Hamza (IEEE-Inst Electrical Electronics Engineers Inc, 2015-01-15)
    We present the design steps for 3D polarization-independent Fabry-Perot cavity. Inclusion of isolated dielectric rods into the limited number of holes at around the central region enables the generation of cavity that ...
  • Two-dimensional complex parity-time-symmetric photonic structures 
    Turduev, M.;  Botey, M.;  Giden, I.; Herrero, R.; Kurt, Hamza;  Ozbay, E.;  Staliunas, K. (American Physical Society, 2015-02)
    We propose a simple realistic two-dimensional complex parity-time-symmetric photonic structure that is described by a non-Hermitian potential but possesses real-valued eigenvalues. The concept is developed from basic ...
  • Evaluating energy cost of route diversity for security in wireless sensor networks 
    Incebacak, Davut; Bıçakçı, Kemal; Tavlı, Bülent (Elsevier, 2015-03)
    Route diversity improves the security of Wireless Sensor Networks (WSNs) against adversaries attempting to obtain sensitive sensor data By limiting the fraction of data relayed over each link and/or routed through each ...