Engineering Physics


Volume 1, Issue 2, December 2017

  • Empirical Validation of Frequency Scaling Factor for Fresnel-Kirchoff Diffraction Parameter

    Wali Samuel, Constance Kalu, Ogungbemi Emmanuel Oluropo

    Issue: Volume 1, Issue 2, December 2017
    Pages: 33-39
    Received: 25 October 2016
    Accepted: 29 December 2016
    Published: 4 February 2017
    DOI: 10.11648/j.ep.20170102.11
    Abstract: In this paper, topographic data for line-of-sight (LOS) communication link between Eket and Akwa Ibom state University are used to validate the frequency scaling factors for computing the radius of the Fresnel zone, Fresnel-Kirchoff diffraction parameter and the number of Fresnel zones that are partially or fully blocked by single knife edge obstru... Show More
  • Structural Design to Maximum Radiating Power of Langevin Bolted Ultrasonic Transducer

    Pak Myong-Il, Ri Ui-Hwan, An Yong-Nam

    Issue: Volume 1, Issue 2, December 2017
    Pages: 40-45
    Received: 28 November 2016
    Accepted: 30 March 2017
    Published: 5 May 2017
    DOI: 10.11648/j.ep.20170102.12
    Abstract: Langevin bolted transducers (BLT) with two piezoelectric ceramics inserted between the front and rear plates are widely used in ultrasonic cleaner transducers and components of underwater acoustic antennas for a fish finder [1, 2]. And it is very important to attain a maximum ratio of vibrating velocities of the front and rear plates of transducers... Show More
  • Effect of Some Additions on the Structure and Mechanical Properties of A356 - Al Si Alloy

    A. M. Ahmed Ali, A. G. Mostafa, A. N. Abdalazim, A. A. Ramadan, I. S. Ahmed Farag

    Issue: Volume 1, Issue 2, December 2017
    Pages: 46-51
    Received: 7 June 2017
    Accepted: 22 June 2017
    Published: 27 July 2017
    DOI: 10.11648/j.ep.20170102.13
    Abstract: The modified eutectic silicon or refinement of primary silicon particles with uniform distribution are desired in real casting practice. In order to modify the microstructure of Al-Si alloys, many techniques are available. However the deliberate additions of several elements during melting are still the most easy and efficient way than other differ... Show More