American Journal of Physics and Applications

Volume 3, Issue 1, January 2015

  • Measurements of K- shell Production Cross-Section and Fluorescence Yield for Y Element

    Hamza Tunç, Rafet Yilmaz, Abdullah Ozkartal, Turgay Ozmen

    Issue: Volume 3, Issue 1, January 2015
    Pages: 1-5
    Received: 30 December 2014
    Accepted: 20 January 2015
    Published: 30 January 2015
    Abstract: K- shell X- ray production cross-section have been measured for Y element. Measurements have been carried out at 16.896 keV excitation energy using secondary source. K X-rays emitted by samples have been counted by a Si(Li) detector with 160 eV resolution at 5.9 keV. The values of K - shell fluorescence yield has been evaluated for Y element. The... Show More
  • Power Performance of an Inversely Tapered Wind Rotor and its Air Flow Visualization Analysis Using Particle Image Velocimetry (PIV)

    Churchill Otieno Saoke, Joseph Ngugi Kamau, Robert Kinyua, Yoshifumi Nishizawa, Izumi Ushiyama

    Issue: Volume 3, Issue 1, January 2015
    Pages: 6-14
    Received: 3 January 2015
    Accepted: 29 January 2015
    Published: 3 February 2015
    Abstract: Wind turbine rotors capture energy from moving wind, their capacity to perform this function depends on the coefficient of power (Cp) of the rotor. Through proper aerodynamic design, a rotor’s performance can be optimized to take advantage of the smallest available wind speed at any time to produce energy. In this research a computational fluid dyn... Show More