Now showing items 1-20 of 1062

    • 2D and 3D shape retrieval using skeleton filling rate 

      Sirin, Yahya; Demirci, Muhammed Fatih (Springer, 2017-03)
      As an increasing number of digital images are generated, a demand for an efficient and effective image retrieval mechanisms grows. In this work, we present a new skeleton-based algorithm for 2D and 3D shape retrieval. The ...
    • 2D lattice material architectures for actuation 

      Nelissen, W. E. D.; Ayas, Can; Tekoğlu, Cihan (Elsevier Ltd, 2019-03)
      The Kagome structure has been shown to be a highly suited micro-architecture for adaptive lattice materials, in which selected lattice members are replaced by actuators aiming to create shape morphing structures. It is the ...
    • A 2D Peridynamic Model for Failure Analysis of Orthotropic Thin Plates Due to Bending 

      Tastan, A.; Yolum, U.; Güler, Mehmet Ali; Zaccariotto, M.; Galvanetto, U. (Elsevier Science Bv, 2016)
      The present paper deals with the problem of cracks propagating in thin orthotropic flat plates under bending loads. We define the mechanical behavior of an orthotropic lamina in which shear deformation can be neglected ...
    • 3D imaging for ground-penetrating radars via dictionarydimension reduction 

      Duman, Muhammed; Gürbüz, Ali Cafer (TÜBİTAK, 2015)
      Ground-penetrating radar (GPR) has been widely used in detecting or imaging subsurface targets. In many applications such as archaeology, utility imaging, or landmine detection, three-dimensional (3D) images of the subsurface ...
    • 3D Shape Recognition: Enhanced Skeletal Points 

      Sirin, Yahya; Demirci, Muhammed Fatih (IEEE, 2015)
      Digital video production is increasing day after day and the effectiveness and efficiency of the image recognition mechanism has became increasingly important. In this study, a new skeleton-based shape recognition algorithm, ...
    • 3D-printed poly(lactic acid) scaffolds for trabecular bone repair and regeneration: scaffold and native bone characterization 

      Velioglu, Zeynep Busra; Pulat, Deniz; Demirbakan, Beril; Ozcan, Burak; Bayrak, Ece; Erişken, Cevat (Taylor and Francis Ltd, 4.05.2019)
      Purpose: Study objectives were set to (i) fabricate 3D-printed scaffolds/grafts with varying pore sizes, (ii) characterize surface and mechanical properties of scaffolds, (iii) characterize biomechanical properties of ...
    • Accelerating beam generation via all-dielectric metasurfaces 

      Yılmaz, Nazmi; Bağcı, Fehim Taha; Özer, Ahmet; Kurt, Hamza (SPIE, 2019)
      All-dielectric metasurfaces are unique component to control optical wavefront with high transmission or reflection coefficient. Recently, accelerating beam, which propagates along curved arbitrary trajectories, has been ...
    • Acil Yardım Akıllı Turnike Sistemi 

      Beytar, Faruk; Budak, Erdem Inanc; Unlu, Aytekin; Eroğul, Osman (IEEE, 2017)
      In case of traffic accidents, firearm injuries and explosions, it is necessary to apply a tourniquet in order to survive the injuries of serious extremity injuries and blood loss. There are a few things to consider when ...
    • Active beam steering and afocal zooming by nematic liquid crystal-infiltrated graded index photonic structures 

      Babayigit, Ceren; Kurt, Hamza; Turduev, Mirbek (Institute of Physics Publishing, 2019)
      This study presents active beam steering and afocal zooming of light by incorporating liquid crystals (LCs) with graded index photonic crystals (GRIN PCs). The GRIN PC structures are composed of low refractive index polymer ...
    • Active Fault Detection in Linear Controller Hardware with Sine Signal 

      Ozkan, M.; Kasnakoğlu, Coşku (Institute of Electrical and Electronics Engineers Inc., 2020-04)
      In this paper, active fault detection is used to detect hardware failure in Linear Controller. Auxiliary test signal is chosen as sine signal. Then frequency and magnitude of sine signal is designed according to bode plot ...
    • Adaptive detection with diffuse multipath exploitation in partially homogeneous environments 

      Hayvacı, Harun Taha; Gülen, Seden Hazal ( Institute of Electrical and Electronics Engineers Inc., 2019)
      In this paper, we deal with the problem of detecting point-like targets in the presence of multipath under the assumption of a partially homogeneous Gaussian disturbance with unknown covariance matrix. Therefore, we introduce ...
    • Adaptive Graded Index Photonic Crystal Lens Design via Nematic Liquid Crystals 

      Giden, Ibrahim Halil; Eti, Neslihan; Rezaei, Behrooz; Kurt, Hamza (IEEE-Inst Electrical Electronics Engineers Inc, 2016-10)
      An adaptive graded index photonic crystal (GRIN PC) lens system is designed by using liquid crystal (LC) infiltration. LCs have the property to change their refractive indices when an external voltage is applied. This ...
    • Adaptive Model Predictive Control of a Two-wheeled Robot Manipulator with Varying Mass 

      Önkol, M.; Kasnakoğlu, Coşku (SAGE Publications Ltd, 2018-03)
      This paper presents the adaptive model predictive control approach for a two-wheeled robot manipulator with varying mass. The mass variation corresponds to the robot picking and placing objects or loads from one place to ...
    • Adaptive modulation for completion time minimization in wireless broadcast networks 

      Yüksel, Melda; Genc, Yasin (Elsevier Gmbh, Urban & Fischer Verlag, 2017)
      In this work we study the effect of hierarchical modulation on completion time minimization in wireless broadcast channels. Time needed to transmit all bits intended for a particular user is defined as its completion time. ...
    • An adaptive tabu search algorithm for market clearing problem in Turkish day-ahead market 

      Kurt, N.E.; Sahin, H.B.; Derinkuyu, K. (IEEE Computer Society, 2018-06-27)
      In this study, we focus on the market clearing problem of Turkish day-ahead electricity market. We propose a mathematical model by extending the variety of bid types for different price regions. The commercial solvers may ...
    • An Adaptive Tabu Search Algorithm for Market Clearing Problem in Turkish Day-Ahead Market 

      Kurt, Nermin Elif; Şahin, H. Bahadır; Derinkuyu, Kürşad (IEEE Computer Society, 2018)
      In this study, we focus on the market clearing problem of Turkish day-ahead electricity market. We propose a mathematical model by extending the variety of bid types for different price regions. The commercial solvers may ...
    • Advances in Capacitive Micromachined Ultrasonic Transducers 

      Brenner, Kevin; Ergun, Arif Şanlı; Firouzi, Kamyar; Rasmussen, Morten Fischer; Stedman, Quintin; Khuri-Yakub, Butrus (Pierre) (MDPI, 2019-02)
      Capacitive micromachined ultrasonic transducer (CMUT) technology has enjoyed rapid development in the last decade. Advancements both in fabrication and integration, coupled with improved modelling, has enabled CMUTs to ...
    • Aerodynamic Analysis Of A Vertically Landing Lifting Body 

      Aradağ, Selin; Seidel, Jurgen; Cummings, Russell M.; Cook, Layne (Turkish Soc Thermal Sciences Technology, 2015)
      The vertical landing lifting body (VLLB) is a new concept for reusable launch vehicles, which launches vertically, but re-enters the atmosphere at a high angle of attack (alpha) for its entire flight. The VLLB remains at ...
    • Aileron Locking Fault Detection Based on Extended Kalman Filter for UAV 

      Demircan, M.; Kasnakoğlu, Coşku (Association for Computing Machinery, 2019-08)
      This paper presents application of Nonlinear Extended Kalman Filter for aileron actuator locking scenario in Unmanned Aerial Vehicles and estimation of states to make comparison between sensor results and estimation results. ...
    • Aircraft Structural Safety : Effects of Explicit and Implicit Safety and Measures Uncertainty Reduction Mechanisms 

      Acar, Erdem (University of Florida, 2006)
      Aircraft structural safety is achieved by using different safety measures such as safety and knockdown factors, tests and redundancy. Safety factors or knockdown factors can be either explicit (e.g., load safety factor of ...