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    Explore 52 peer-reviewed articles across the MTU journal network.

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    2 of 2 articles

    MTUFeb 14, 2022

    Complex dynamics in soil temperature: A case study of Southern Nigeria

    S. O. Kareem, U. E. Vincent, J. A. Laoye

    In this paper, the soil temperature dynamics in south-western Nigeria is investigated using nonlinear time series analysis approach. The 5-mins interval soil temperature data observed continuously over a period of 1 year (from January to December, 2012) were analysed to investigate the existence of chaos. We employed the method of false nearest neighbour carefully interlaced with the average mutual information method to reconstruct the original attractor of the soil temperature's evolution process. The Lyapunov exponent, in addition to the strange attractor of the process, was also employed to identify chaos in the process. Numerical simulations were performed to show the validity of our approach. Tabular and graphical are presented. The results of the computation show the existence of chaos in the soil temperature.
    Soil temperaturechaosnonlinear time seriesfalse nearest neighbouraverage mutual information
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    MTUFeb 14, 2022

    Application of Vibrational Resonance to Solve Call-Drop Issue Experienced in Telecommunication.

    Vincent, U. E., et al.

    One of the biggest problems nowadays for network operators are recurring call drops. The number of subscribers has tremendously increased over the years; the quality of service (Call Drop Rate) has become an issue to consider as many subscribers are not satisfied with the services rendered. There are various causes of call drop in telecommunications such as Electromagnetic causes, Irregular user behavior, abnormal network response and others. Over 50% of call drops are caused by electromagnetic strength fluctuations such as power attenuation, deep fading and so on. In this paper vibrational resonance (VR) is proposed as a strategy towards solving the aspect of call drops caused by power attenuation. Attenuated amplitude modulated (AM) signal, with frequency ‘
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