American Journal of Software Engineering and Applications

Volume 6, Issue 2, April 2017

  • Medical Image Segmentation by Active Contour Improvement

    Abdelaziz Essadike, Elhoussaine Ouabida, Abdenbi Bouzid

    Issue: Volume 6, Issue 2, April 2017
    Pages: 13-17
    Received: 13 March 2017
    Accepted: 22 March 2017
    Published: 3 April 2017
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    Abstract: This paper introduces a new medical image segmentation approach based on active contour improvement. The boundaries in brain images are detected using an original technique of active contour improved by a Region of Interest (ROI) extraction. We compare the results of the proposed model to Chane-Vese active contour model and Caselles’s et al. Geodes... Show More
  • An Online Poultry Diseases Monitoring System for Nigeria

    Moses Oyekunle Oyetunji, Florence Alaba Oladeji, Olorunjube James Falana, Peter Adebayo Idowu

    Issue: Volume 6, Issue 2, April 2017
    Pages: 18-28
    Received: 21 March 2017
    Accepted: 31 March 2017
    Published: 24 April 2017
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    Abstract: Poultry disease statistics in Nigeria reveal a serious and growing problem with absolute fatality rate and casualty figure rising rapidly. A crucial goal of infectious disease surveillance is the early detection of epidemics, which is essential for disease control. The current system for monitoring poultry disease is based on conventional method us... Show More
  • Shibuya Method and Modified ITU Knife Edge Diffraction Loss Model for Computing N Knife Edge Diffraction Loss

    Kalu Okore Ama, Constance Kalu, Aneke Chikezie

    Issue: Volume 6, Issue 2, April 2017
    Pages: 29-34
    Received: 3 January 2017
    Accepted: 10 January 2017
    Published: 12 June 2017
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    Abstract: In this paper, algorithm for applying Shibuya multiple knife edge diffraction method and modified ITU-R P 526-13 knife edge diffraction loss approximation model are presented. Particularly, in this paper, algorithm for using the two models for computing N knife edge diffraction loss is presented. Requisite mathematical expressions for the computati... Show More
  • Determination of Rounded Edge Diffraction Loss for a Plateau Using Hacking Method

    Victor Akpaiya Udom, Kalu Constance, Asuquo Ifiok Okon

    Issue: Volume 6, Issue 2, April 2017
    Pages: 35-39
    Received: 3 January 2017
    Accepted: 18 January 2017
    Published: 12 June 2017
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    Abstract: In this paper, Hacking rounded edge diffraction loss method is used to determine the diffraction loss over a plateau in the path of microwave signal in the GSM frequency band, 800 MHz to 2100 MHz. The computation is based on the path profile with path length of 4996.243 m and a plateau in the signal path. The plateau has maximum elevation of 268.9 ... Show More
  • Algorithm for Computing N Knife Edge Diffraction Loss Using Epstein-Peterson Method

    Wali Samuel, Fidelis Osanebi Chucks Nwaduwa, Trust Christopher Oguichen

    Issue: Volume 6, Issue 2, April 2017
    Pages: 40-43
    Received: 3 January 2017
    Accepted: 18 January 2017
    Published: 12 June 2017
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    Abstract: In this paper, algorithm for computing N knife edge diffraction loss using Epstein-Peterson method and International Telecommunication Union (ITU) knife edge diffraction loss approximation model is presented. Requisite mathematical expressions for the computations are first presented before the algorithm is presented. Then sample 10 knife edge obst... Show More
  • Determination of the Minimum Antenna Mast Height with Nonzero Path Inclination: Method II

    Fidelis Osanebi Chucks Nwaduwa, Wali Samuel, Elsie Chidinma Anderson

    Issue: Volume 6, Issue 2, April 2017
    Pages: 44-48
    Received: 3 January 2017
    Accepted: 18 January 2017
    Published: 12 June 2017
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    Abstract: In this paper, a second method for the determination of the minimum antenna mast height for line of site wireless communication link with nonzero path inclination and with known height of one of the antennas is presented. In the first method,(not presented here), none of the antenna height is known. In this second paper, the height of one of the an... Show More
  • Evaluation of the Effect of Radius of Curvature on the Rounded Edge Diffraction Loss Computed by Hacking Method for a Plateau

    Swinton C. Nwokonko, Ikechukwu H. Ezeh, Vital K. Onwuzuruike

    Issue: Volume 6, Issue 2, April 2017
    Pages: 49-55
    Received: 8 January 2017
    Accepted: 18 January 2017
    Published: 12 June 2017
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    Abstract: In this paper, the effect of the radius of curvature on the diffraction loss of rounded edge obstruction is presented. The study is conducted for C-band microwave link with a plateau in its path. The plateau has flat to that spans about 1922 m. Two different approaches are used to determine the radius of curvature of the rounded edged fitted to the... Show More
  • Determination of Diffraction Loss over Isolated Doubled Edged Hill Using the ITU-R P.526-13 Method for Rounded Edge Diffraction

    Ogungbemi Emmanuel Oluropo, Ikechukwu H. Ezeh, Chibuzo Promise Nkwocha

    Issue: Volume 6, Issue 2, April 2017
    Pages: 56-60
    Received: 8 January 2017
    Accepted: 18 January 2017
    Published: 12 June 2017
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    Abstract: In this paper, Recommendation ITU-R P.526-13 rounded edge diffraction loss method is used to determine the diffraction loss over a double edged hilltop in the path of 6 GHz C-band microwave signal. The computation is based on the path profile with path length of 6188.665 m. The path profile has maximum elevation of 412.75 m and it occurred at a dis... Show More