Now showing items 1-20 of 71

    • Power converters as natural gyrators 

      Ehsani, Mehrdad; Husain, Iqbal; Bilgiç, Mehmet Oruç (IEEE, 1993-12)
      The authors investigate the open-loop gyrator behavior of a class of DC-DC converters that are characterized by double bridges. If the switching frequency of the double bridge converter is high enough with respect to its ...
    • Magnetically inflatable SPS with energy storage capability 

      Ehsani, M.; Bilgiç, Mehmet Oruç; Patton, A. D.; Mitra, J. (IEEE, 1995)
      A new approach to superconductive magnetic energy storage (SMES) for solar power satellite (SPS) with inherent rigidity is introduced in this paper. The rigidity of this SMES originating from the electromagnetic forces ...
    • Capacitor coupled converter (C3) for high power DC conversion 

      Ehsani, Morteza; Bilgiç, Mehmet Oruç; Khan, S.; Laskai, L.; Jeong, Seung-Gi (IEEE, 1995)
      The bang-bang controlled capacitor coupled converter (C<sup>3</sup>) is described in this paper. Due to the converter's inherent commutating property, the C<sup>3</sup> can accommodate thyristors as well as high-power gate ...
    • New architectures for space power systems 

      Ehsani, M.; Bilgiç, Mehmet Oruç; Patton, Alton D.; Mitra, J. (IEEE, 1995-08)
      Electric power generation and conditioning have experienced revolutionary development over the past two decades. Furthermore, new materials such as high energy magnets and high temperature superconductors are either available ...
    • Fuzzy logic based control of switched reluctance motor to reduce torque ripple 

      Derdiyok, A.; İnanç, N.; Özbulur, Veysel; Pastacı, Halit; Bilgiç, Mehmet Oruç (IEEE, 1997)
      This paper presents torque ripple reduction of a switched reluctance motor (SRM) by using a fuzzy speed controller. For this purpose, current control is applied with a fuzzy speed controller. The fuzzy controller adjusts ...
    • Improving performance of switched reluctance motor by fuzzy logic controller 

      Derdiyok, A.; Inanc, N.; Özbulur, Veysel; Bilgiç, Mehmet Oruç (1999-04)
      This paper presents torque ripple minimization of a switched reluctance motor (SRM) by using a fuzzy controller, The nonlinear model of the SRM and the mathematical model of the converter circuit are driven. The motor used ...
    • Texture Analysis Based Iris Recognition 

      Gürkan, Güray; Akan, Aydın (2006-01)
      In this paper, we present a new method for personal identification, based on iris patterns. The method composed of iris image acquisition, image preprocessing, feature extraction and finally decision stages. Normalized ...
    • An FPGA implementation of 2-D CNN Gabor-type filter 

      Saatçı, Ertuğrul; Cesur, Evren; Tavşanoğlu, Vedat; Kale, İzzet (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2007)
      A field programmable gate array (FPGA) implementation of the Gabor-type filter is presented. The implementation uses the forward Euler approximation with optimal step size to solve the CNN cell-state equation. The FPGA is ...
    • Lung Sound Noise Reduction Using Gabor Time-Frequency Masking 

      Saatçı, Esra; Akan, Aydın (SPRINGER-VERLAG BERLIN, HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY, 2007)
      The Gabor expansion is a mathematical tool, which provides a joint time-frequency representation of a given signal by decomposing it into time-frequency elementary signals called Gabor atoms. It has been used in a variety ...
    • Lung model parameter estimation by unscented Kalman filter 

      Saatçı, Esra; Akan, Aydın (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2007)
      Dynamic nonlinear models are the best choice to analyze respiratory systems and to describe system mechanics. In this work, Unscented Kalman Filtering (UKF) was used to estimate the dynamic nonlinear model parameters of ...
    • RESPIRATORY PARAMETER ESTIMATION IN LINEAR LUNG MODELS 

      Saatçı, Esra; Akan, Aydın (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2008)
      If the respiratory system Is represented as a one compartment model composed of linear electrical elements, the Minimum Variance Unbiased Estimation (MVUE) Is the optimum statistical method to estimate the model parameters. ...
    • Aircraft sensor fault detection based on unknown input observers 

      Çetin, Ömer; Kıyak, Emre; Kahvecioğlu, Ayşe (Emerald Group Publishing Limited, Howard House, Wagon Lane, Bingley Bd16 1Wa, W Yorkshire, England, 2008)
      Purpose - The purpose of this paper is to generate residuals which can be used to detect fault and isolate on a vertical takeoff and landing (VIOL) aircraft dynamic model. Design/methodology/approach - In the proposed ...
    • Adjective Check List and Psychological Stress: Evidence From Turkey 

      Erkoç, Tuba; Kurt, Doğuş; Bayramoğlu, Oya; Yıldırım, Halil; Yıldırım, Osman (Int Scientific Conference SGEM, 14, Kilment Ohridsky BLVD, Sofia, 1797, Bulgaria, 2008)
      It is called stress when an individual begins to act different physically and mentally as a result of the fact that he or she is affected by the environment lie or she lived and worked in. To block or balance the process ...
    • Internet Addiction Research in The School of Vocational Studies: Evidence from Turkey 

      Kurt, Doğuş; Tekin, Abdulkadir (Int Scientific Conference SGEM, 14, Kilment Ohridsky BLVD, Sofia, 1797, Bulgaria, 2008)
      As a growing trend in the world, internet-based remote education both in governmental and private education institutes is getting popular in Turkey as it is to be all over the world. Internet-based education models give ...
    • Relationship Between Emotional Intelligence and Foreign Language Learning 

      Tekin, Abdulkadir; Yıldırım, Halil; Yıldırım, Osman (Int Scientific Conference SGEM, 14, Kilment Ohridsky BLVD, Sofia, 1797, Bulgaria, 2008)
      The increasing number of recent researches indicates that emotional intelligence is more important than IQ in many fields. In literature, many quantitative findings indicate that there is a significant relationship between ...
    • The effect of emotional intelligence on job satisfaction: a case study in education 

      Özer, Aslıhan; Dede, Nazan; Yıldırım, Osman (Int Scientific Conference SGEM, 14, Kilment Ohridsky Blvd, Sofia, 1797, Bulgaria, 2008)
      The importance of understanding Emotional intelligence (EI) skills has gravitated form the business management to training activities. The increasing number of recent researches oil this relatively new subject have been ...
    • Accreditation for cademic quality 

      Şenel, Seçil; Yalçın, Dilek (Int Scientific Conference SGEM, 14, Kilment Ohridsky BLVD, Sofia, 1797, Bulgaria, 2008)
      As it is well-known, the latest trend in academia has been the rapid growth of online or distance learning courses. Globalization makes mobility easy and possible. That is why a graduate has the opportunity to find not ...
    • The impact of social intelligence on academic achievement 

      Bal, Pervin; Yıldırım, Osman; Yıldırım, Halil (Int Scientific Conference SGEM, 14, Kilment Ohridsky Blvd, Sofia, 1797, Bulgaria, 2008)
      In the research, The Resilience Scale for Adults (RSA-scale) proposed by Hjemdal, Friborg, Martinussen, and Rosenvinge was used to assess students' social intelligence. RSA-scale is consisted of 45 items including live ...
    • Wiener-Hopf Analysis of Grooved Coaxial Waveguide 

      Büyükaksoy, İbrahim Alinur; Hacıvelioğlu, Ferda; Uzgören, G. (IEEE, 345 E 47th St, New York, Ny 10017 USA, 2008)
      A Wiener-Hopf analysis is provided for the propagation of the dominant TEM mode in a coaxial waveguide with a dielectric filled groove on the outer conductor. Some graphical results showing the effects of the groove depth ...
    • Dual Kalman Filter based State-Parameter Estimation in Linear Lung Models 

      Akan, Aydın; Saatçı, Esra (Springer, 233 Spring Street, New York, Ny 10013, United States, 2009)
      Time-domain approach to inverse modeling of respiratory system requires estimation of the parameters from the noisy observation. In this work, states and parameters of the linear lung models are estimated simultaneously ...