Now showing items 1-11 of 11

    • Bessel functions-Based reconstruction of non-uniformly sampled diffraction fields 

      Uzunov, V.; Esmer, G. B.; Gotchev, A.; Onural, L.; Ozaktas, H. M. (2007)
      A discrete computational model for the diffraction process is essential in forward problems related to holographic TV. The model must be as general as possible, since the shape of the displayed objects does not bear any ...
    • The Fractional Fourier transform and harmonic oscillation 

      Kutay, M. A.; Ozaktas, H. M. (Springer, 2002)
      The ath-order fractional Fourier transform is a generalization of the ordinary Fourier transform such that the zeroth-order fractional Fourier transform operation is equal to the identity operation and the first-order ...
    • Free expansion of two-dimensional condensates with a vortex 

      Hoşten, O.; Vignolo, P.; Minguzzi, A.; Tanatar, B.; Tosi, M. P. (Institute of Physics Publishing, 2003)
      We study the free expansion of a pancake-shaped Bose-condensed gas, which is initially trapped under harmonic confinement and containing a vortex at its centre. In the case of a radial expansion holding the axial confinement ...
    • Implications of energy conditions on standard static space-times 

      Dobarro, F.; Ünal, B. (Pergamon Press, 2009)
      In the framework of standard static space-times, we state a family of sufficient or necessary conditions for a set of physically reasonable energy and convergence conditions in relativity and related theories. We concentrate ...
    • Independent estimation of input and measurement delays for a hybrid vertical spring-mass-damper via harmonic transfer functions 

      Uyamk I.; Ankarali, M.M.; Cowan, N.J.; Saranli, U.; Morgül Ö.; Özbay H. (IFAC Secretariat, 2015)
      System identification of rhythmic locomotor systems is challenging due to the time-varying nature of their dynamics. Even though important aspects of these systems can be captured via explicit mechanics-based models, it ...
    • Novel microstrip fed mechanically tunable combline cavity filter 

      Kurudere, S.; Erturk, V. B. (IEEE, 2013)
      A novel configuration for mechanically tunable combline bandpass filters is proposed, where the classical resonating rod-tuning screw combination is replaced with a simple printed circuit-tuning screw combination. Moreover, ...
    • Novel SIW based interdigital bandpass filter with harmonic suppression 

      Kurudere, S.; Ertürk, V. B. (Institute of Electrical and Electronics Engineers Inc., 2014)
      A novel configuration for substrate integrated waveguide (SIW) based bandpass filter with interdigital type resonators is presented. In the proposed structure, interdigital type resonators consisting of vias and circular ...
    • Simulation of millimeter-wave gunn oscillations in gallium nitride 

      Sevik, C.; Bulutay, C. (2004)
      High field transport in wide bandgap semiconductors like GaN is of great technological importance. The negative differential mobility regime at high fields, under suitable conditions, can lead to millimeterwave Gunn ...
    • SIW‐based interdigital bandpass filter with harmonic suppression 

      Kurudere, S.; Ertürk, V. B. (John Wiley and Sons Inc., 2015)
      A novel configuration of interdigital bandpass filter based on the substrate integrated waveguide (SIW) technology is proposed. In addition to the interdigital resonators in SIW that determine the main response/characteristics ...
    • Ultra-low timing-jitter passively mode-locked fiber lasers for long-distance timing synchronization 

      Ilday, F. Ö.; Winter, A.; Kim J.-W.; Chen, J.; Schmüser, P.; Schlarb, H.; Kärtner, F. X. (S P I E - International Society for Optical Engineering, 2006)
      One of the key challenges for the next-generation light sources such as X-FELs is to implement a timing stabilization and distribution system to enable ∼ 10 fs synchronization of the different RF and laser sources distributed ...
    • Wafer bonded capacitive micromachined underwater transducers 

      Olcum, S.; Oǧuz, K.; Şenlik, M.N.; Yamaner F.Y.; Bozkurt, A.; Atalar, Abdullah; Köymen H. (2009)
      In this work we have designed, fabricated and tested CMUTs as underwater transducers. Single CMUT membranes with three different radii and 380 microns of thickness are fabricated for the demonstration of an underwater CMUT ...