Results 11 to 20 of about 67,757 (265)
Predicting the Speed of Epidemics Spreading in Networks [PDF]
Physical Review Letters, 2020 Global transport and communication networks enable information, ideas and infectious diseases now to spread at speeds far beyond what has historically been possible. To effectively monitor, design, or intervene in such epidemic-like processes, there is a need to predict the speed of a particular contagion in a particular network, and to distinguish ...
Sam Moore, Tim Rogers
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On an upper bound for the spreading speed
Discrete and Continuous Dynamical Systems - B, 2022 <p style='text-indent:20px;'>In this paper, we use the exponential transform to give a unified formal upper bound for the asymptotic rate of spread of a population propagating in a one dimensional habitat. We show through examples how this upper bound can be obtained directly for discrete and continuous time models. This upper bound has the form &
Mesk, Mohammed, Moussaoui, Ali
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High-Speed Railways and the Spread of Covid-19
SSRN Electronic Journal, 2022 High-speed railways (HSRs) greatly decrease transportation costs and facilitate the movement of goods, services, and passengers across cities. In the context of the Covid-19 pandemic, however, HSRs may contribute to the cross-regional spread of the new coronavirus.
Pang, Jindong, He, Youle, Shen, Shulin
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Approximate solution to the speed of spreading viruses [PDF]
Physical Review E, 2004 Recently, it has been shown that the speed of virus infections can be explained by time-delayed reaction-diffusion [J. Fort and V. Méndez, Phys. Rev. Lett. 89, 178101 (2002)], but no analytical solutions were found. Here we derive formulas for the front speed, valid in appropriate limits.
Ortega-Cejas, Vicente +3 more
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Speed of injection and spread of bupivacaine in the epidural space [PDF]
Anaesthesia, 1987 Summary Speed of injection of bupivacaine was assessed in 73 women who received epidural analgesia in labour. Rapid injection was shown to produce quicker onset of epidural block and more reliable perineal anaesthesia than slow injection, but there was no difference in the final extent of the block.
R B, Griffiths +3 more
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Speed of quantum information spreading in chaotic systems [PDF]
Physical Review B, 2020 Added subsection on spherical subregions, corrected typos, and updated ...
Josiah Couch +4 more
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An extension of the formula for spreading speeds
Mathematical Biosciences and Engineering, 2010 A well-known formula for the spreading speed of a discrete-time recursion model is extended to a class of problems for which its validity was previously unknown. These include migration models with moderately fat tails or fat tails. Examples of such models are given.
Hans F. Weinberger, Xiao-Qiang Zhao
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Spreading speeds and spreading sets of reaction-diffusion equations
, 2021 This paper deals with the large time dynamics of bounded solutions of reaction-diffusion equations with unbounded initial support in $\mathbb{R}^N$. We prove a variational formula for the spreading speeds in any direction, and we also describe the asymptotic shape of the level sets of the solutions at large time.
Hamel, François, Rossi, Luca
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Spreading Speeds of Nonlocal KPP Equations in Heterogeneous Media [PDF]
Acta Mathematica Sinica, English Series, 2022 In this paper, we prove the existence of the spreading speed of nonlocal KPP equations in two cases: 1. The media is almost periodic and the kernel of diffusion is continuous; 2. The media is periodic and the diffusion is not continuous but weak irreducible.
Liang, Xing, Zhou, Tao
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Generational Spreading Speed and the Dynamics of Population Range Expansion [PDF]
The American Naturalist, 2015 Some of the most fundamental quantities in population ecology describe the growth and spread of populations. Population dynamics are often characterized by the annual rate of increase, λ, or the generational rate of increase, R0. Analyses involving R0 have deepened our understanding of disease dynamics and life-history complexities beyond that afforded
Bateman, Andrew W. +3 more
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