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    Threshold dynamics of a periodic SIR model with delay in an infected compartment by Zhenguo Bai

    Published 2014-12-01
    “…We first introduce the basic reproduction number$\mathcal {R}_0$ for the model, and then show that it can act as athreshold parameter that determines the uniform persistence orextinction of the disease. …”
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  13. 833

    A male-female mathematical model of human papillomavirus (HPV) in African American population by Najat Ziyadi

    Published 2016-12-01
    “…We compute the basic reproduction number, $\mathcal{R}_0$ , and use it to show that $\mathcal{R}_0$ is less than 1 in the African American (AA) population with or without implementation of HPV vaccination program. …”
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  14. 834

    Epidemic threshold conditions for seasonally forced SEIR models by Junling Ma, Zhien Ma

    Published 2005-10-01
    “…For autonomous models, the basic reproduction number $\mathcal{R}_0 < 1$ is usually both necessary and sufficient for the extinction of diseases. …”
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    The Effect of Steady Flow on the Physical Quantities of Slow mMagneto Acoustic Waves in Solar Coronal Plasma by Abbas Abedini

    Published 2020-04-01
    “…Since the launch of solar space telescopes, many observational evidences for the occurrence of slow MHD waves have been detected in various structures of the solar corona.}In this paper, the effect of steady flow of coronal plasma textbf{on the damping time and other physical quantities} of slow magneto-acoustic waves in the presence of thermal conduction and compressive viscosity is studied.The perturbed and linearized MHD Equations of a flowing coronal plasma are solved both analytically and numerically by Mac Cormack method to investigate the effect of steady flows on physical quantities of slow magneto-acoustic waves.The results of this study show that with increasing magnitude values of the Mach number from 0 to 0.6 and increasing the compressive viscosity and thermal conduction coefficient with increasing the temperature from 2 to 6 MK, the oscillation periods, the damping times and the damping qualities change significantly. …”
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    Exploring chirality structure in nucleon decay by Koichi Hamaguchi, Shihwen Hor, Natsumi Nagata, Hiroki Takahashi

    Published 2025-01-01
    “…Abstract Baryon number is an accidental symmetry in the Standard Model, but its violation is theoretically anticipated, making the search for such processes a promising avenue for discovering new physics. …”
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