Results 1 to 10 of about 300 (139)

The effect of changing COVID-19 restrictions on the transmission rate in a veterinary clinic [PDF]

open access: yesInfectious Disease Modelling, 2023
With the declaration of the COVID-19 pandemic by the World Health Organization on March 11, 2020, the University of Tennessee College of Veterinary Medicine (UTCVM), like other institutions, restructured their services to reduce the potential spread of ...
Lee Spence   +6 more
doaj   +2 more sources

A vaccination model for COVID-19 in Gauteng, South Africa [PDF]

open access: yesInfectious Disease Modelling, 2022
The COVID-19 pandemic provides an opportunity to explore the impact of government mandates on movement restrictions and non-pharmaceutical interventions on a novel infection, and we investigate these strategies in early-stage outbreak dynamics.
Christina J. Edholm   +10 more
doaj   +2 more sources

Riemann-Liouville fractional integro-differential equations with fractional nonlocal integral boundary conditions

open access: yesBoundary Value Problems, 2011
This article investigates a boundary value problem of Riemann-Liouville fractional integro-differential equations with fractional nonlocal integral boundary conditions.
Ahmad Bashir, Nieto Juan
doaj   +2 more sources

Optimal control strategies for preventing hepatitis B infection and reducing chronic liver cirrhosis incidence [PDF]

open access: yesInfectious Disease Modelling, 2020
Advanced liver cirrhosis has become life-threatening among non-communicable diseases nowadays. Cirrhosis, the terminal stage of liver diseases in which the liver develops scarring as a result of various long-term continuous damages. Among liver diseases,
Mst. Shanta Khatun   +1 more
doaj   +2 more sources

A model of competing species that exhibits zip bifurcation

open access: yesRevista Integración, 2017
The purpose of this paper is to present a concrete model of competing population species that exhibits a phenomenon called zip bifurcation. The Zip Bifurcation was introduced by Farkas in 1984 for a three dimensional ODE prey-predator system describing a
Luis F. Echeverri   +2 more
doaj   +2 more sources

Existence of solutions to nonlinear Sturm-Liouville problems with large nonlinearities

open access: yesDifferential Equations & Applications, 2021
In this paper, we present results which allow us to establish the existence of solutions to nonlinear Sturm-Liouville problems with unbounded nonlinearities. We consider both regular and singular problems.
B. Freedman, Jesús F. Rodríguez
semanticscholar   +1 more source

Modified Van der Pol-Helmholtz oscillator equation with exact harmonic solutions

open access: yes, 2022
In this paper, we present an exceptional Lienard equation consisting of a modified Van der Pol-Helmholtz oscillator equation. The equation, a frequency-dependent damping oscillator, does not satisfy the classical existence theorems but, nevertheless ...
Abdou Raimi Olagnika Akplogan   +4 more
semanticscholar   +1 more source

The existence of infinitely many boundary blow-up solutions to the p-k-Hessian equation

open access: yesAdvanced Nonlinear Studies, 2023
The primary objective of this article is to analyze the existence of infinitely many radial pp-kk-convex solutions to the boundary blow-up pp-kk-Hessian problem σk(λ(Di(∣Du∣p−2Dju)))=H(∣x∣)f(u)inΩ,u=+∞on∂Ω.{\sigma }_{k}\left(\lambda \left({D}_{i}\left({|
Feng Meiqiang, Zhang Xuemei
doaj   +1 more source

EXACT SOLUTION OF VAN DER POL NONLINEAR OSCILLATORS ON FINITE DOMAIN BY PADE APPROXIMANT AND ADOMIAN DECOMPOSITION METHODS

open access: yes, 2021
This paper is concerned with a thorough investigation in achieving exact analytical solution for the Van der Pol (VDP) nonlinear oscillators models via Adomian decomposition method (ADM).
E. U. Agom, F. Ogunfiditimi
semanticscholar   +1 more source

Existence of positive solutions for second-order nonlinear neutral dynamic equations on time scales

open access: yesMoroccan Journal of Pure and Applied Analysis, 2021
In this article we study the existence of positive solutions for second-order nonlinear neutral dynamic equations on time scales. The main tool employed here is Schauder’s fixed point theorem.
Bouchelaghem Faycal   +2 more
doaj   +1 more source

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