Elektrik - Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering: Recent submissions

Now showing items 81-92 of 92

    • Monitoring of actuation conditions in a micro- turbo-generator 

      Beyaz, Mustafa İlker; Hanrahan, Brendan M.; Feldman, Jeremy H.; Ghodssi, Reza (IEEE Sensors Journal, 2013)
      This paper presents the theory and implementation of an integrated sensing technique for the real-time measurement of applied actuation conditions in a micro-turbo-generator. The device is composed of a microturbine rotor ...

    • An adhesion-dominated rolling Friction regime unique to micro-scale ball bearings 

      Hanrahan, Brendan M.; Misra, Saswat; Beyaz, Mustafa İlker; Feldman, Jeremy H.; Waits, Christopher M.; Ghodssi, Reza (Tribology Letters, 2014)
      We demonstrate that micro-scale rolling bearings exhibit friction and wear properties markedly different from their macro-scale counterparts. A microfabricated testing platform uses variable rolling element diameters or ...

    • An investigation on the electromagnetic design optimization of rotary micromachines with double-layer permanent magnets 

      Özkaya, Kamil Yunus; Beyaz, Mustafa İlker (Sensors and Actuators A: Physical, 2015)
      Electromagnetic design optimization of axial-flux rotary micromachines utilizing double-layer permanent magnets is presented and applied to a micro-scale generator/spirometer currently under development. Double-layer magnet ...

    • The development and performance characterization of turbine prototypes for a MEMS spirometer 

      Göreke, Utku; Habibiabad, Sahar; Azgın, Kıvanç; Serinağaoğlu Doğrusöz, Yeşim; Beyaz, Mustafa İlker (IEEE Sensors Journal, 2016)
      The design, optimization, and performance characterization of turbine prototypes for the development of a Microelectromechanical Systems spirometer is reported. Four different turbines were designed based on large-scale ...

    • A non-resonant kinetic energy harvester for bioimplantable applications 

      Beyaz, Mustafa İlker; Baelhadj, Hacene; Habibiabad, Sahar; Adhikari, Shyam; Davoodi, Hossein; Badilita, Vlad (Micromachines, 2018)
      A linear non-resonant kinetic energy harvester for implantable devices is presented. The design contains a metal platform with permanent magnets, two stators with three-dimensional helical coils for increased power generation, ...

    • Energy harvesting from knee motion using piezoelectric patch transducers 

      Beyaz, Mustafa İlker (Academic Platform Journal of Engineering and Science, 2019)
      This paper presents a piezoelectric energy harvesting device that generates electrical power from knee motion during human gait. The device is composed of two MEMS-based piezoelectric patch transducers optimized for placement ...

    • Hybrid magnetic-piezoelectric energy harvester for power generation around waistline from gait 

      Beyaz, Mustafa İlker; Tat, Fatih; Özkaya, Kamil Yunus; Özbek, Ramazan (Journal of Electrical Engineering & Technology, 2019)
      The development of a novel hybrid energy harvester for scavenging power around human waistline is presented. The harvester is composed of mm-scale electromagnetic coils and piezoelectric transducers incorporated on a belt, ...

    • A turbine-based MEMS sensor for spirometry with wearable devices 

      Beyaz, Mustafa İlker; Habibiabad, Sahar; Yıldız, Hamza; Göreke, Utku; Azgın, Kıvanç (IEEE Sensors Journal, 2019)
      This paper presents a turbine-based microelectromechanical systems (MEMS) sensor for spirometry application. The compact sensor dimensions allow integration into smart wearable devices for mobile spirometry without a ...

    • A compact energy transducer for power generation from respiration 

      Beyaz, Mustafa İlker; Habibiabad, Sahar; Yıldız, Hamza; Göreke, Utku; Azgın, Kıvanç (Journal of Microelectromechanical Systems, 2019)
      This paper reports a compact magnetic transducer developed for generating electrical power from respiration. The device incorporates a side-drive turbine rotor with embedded permanent magnets and two stators, integrated ...

    • Cr: Colquiriite Lasers: Current Status and Challenges for Further Progress 

      Demirbaş, Ümit (Progress in Quantum Electronics, 2019)
      Cr: Colquiriite laser materials (Cr:LiCAF, Cr:LiSAF, Cr:LiSGaF) own broad absorption bands in the visible region that allow direct-diode pumping by well-developed low-cost red diodes. Moreover, they possess broad emission ...

    • Fabrication and characterization of TiO2 nanoparticles conjugated luminescence upconversion nanoparticles 

      Demirel Topel, Seda; Topel, Önder; Turgut Cin, Günseli (Open Access Journal, 2018)
      TiO2 nanoparticles conjugated luminescence upconversion (TiO2-UC) nanocomposites have been fabricated by covalently linking of carboxyl-functionalized TiO2 and amino-functionalized NaYF4:Yb3+,Er3+,Ce3+ upconversion ...

    • pH-responsive carboxymethyl cellulose conjugated superparamagnetic iron oxide nanocarriers 

      Gürkan Polat, Tülin; Demirel Topel, Seda (Journal of Scientific Perspectives, 2019)
      In the present study, polyethyleneimine (PEI) coated superparamagnetic iron oxide nanoparticles (SPIONs) having the size of 15 nm in diameter with high magnetic saturation (60 emu/g) have been prepared by co-precipitation ...