Browsing by Author "Khaled, N."

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    Dark comets: the cosmic catastrophic threat to earth
    (SPC, 6/15/2021) Khalil, M; Said, M; Osman, H; Younis, N; Khaled, N.; Amr, Y; Mohamed, N.A.; Ibrahim, A.
    Dark Comets are catastrophic hazardous objects that could hit Earth without warning. There are thousands of such unseen comets buzzing around. Very few of which are known. An overview of the dark comets deadly threat is presented in this paper. Moreover, detection techniques of these invisible objects are discussed.
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    Mathematical Modelling of Fractional-order Covid-19 Pandemic With Memory Effect: A Review
    (October university for modern sciences and Arts MSA, 2023) Khalil Ibrahim, Mohamed; Said, M.; El-Sedfy, S. M.; Khaled, M.; Ibrahim, A.; Abdellah, N.; Khaled, N.
    Mathematical models with memory effect play an important role in the field of epidemiology. The fractional-order derivatives are powerful tools to characterize the memory effect in the dynamical systems of infectious diseases. Hence, we attempt to present a systematic survey on the fractional-order compartmental models of Covid-19 pandemic to explain how the fractional-order models have been employed to study and forecast the spread of Covid-19 pandemic. Such non-integer order models can help decision makers in control programs to put strategic plans to control Covid-19 outbreakMathematical models with memory effect play an important role in the field of epidemiology. The fractional-order derivatives are powerful tools to characterize the memory effect in the dynamical systems of infectious diseases. Hence, we attempt to present a systematic survey on the fractional-order compartmental models of Covid-19 pandemic to explain how the fractional-order models have been employed to study and forecast the spread of Covid-19 pandemic. Such non-integer order models can help decision makers in control programs to put strategic plans to control Covid-19 outbreak