Results 131 to 139 of about 334 (139)

A paradox in Hele-Shaw displacements

Annali dell?Università di Ferrara, 2018
We study the Hele-Shaw immiscible displacements when all surfaces tensions on the interfaces are zero. The Saffman-Taylor instability occurs when a less viscous fluid is displacing a more viscous one, in a rectangular Hele-Shaw cell.
Gelu Pacsa
semanticscholar   +1 more source

On the Boundedness of Solutions of a Non-autonomous Differential Equation of Second Order

Sarajevo Journal of Mathematics
We study the boundedness of the solutions to a non-autonomous differential equation of second order. With this work, we improve some stability results in the literature of boundedness of the solutions.
C. Tunç
semanticscholar   +1 more source

Delay Induced Hopf Bifurcation in a Nonlinear Innovation Diffusion Model: External Influences Effect

East Asian Journal on Applied Mathematics, 2018
A nonlinear innovation diffusion model which incorporates the evaluation stage (time delay) is proposed to describe the dynamics of three population classes for non-adopter and adopter densities.
Rakesh Kumar
semanticscholar   +1 more source

New results on asymptotic stability of time-varying nonlinear systems with applications

Studia Universitatis Babeş-Bolyai. Mathematica
. In this paper, we present a converse Lyapunov theorem for the new notion of global generalized practical uniform h-stability of nonlinear systems of differential equations.
A. Kicha, H. Damak, M. Hammami
semanticscholar   +1 more source

Modelling the Impact of Vaccination and Screening on the Dynamics of Human Papillomavirus Infection

, 2014
While human papillomavirus has been a recognized disease for a long time, the control of outbreaks remains a challenge. The aim of this study is to investigate the role of screening and vaccination as control strategies in curtailing the spread of the ...
N. Shaban, Hawa Mofi
semanticscholar   +1 more source

A Criterion for the Unique Existence of the Limit Cycle of a Lienard-Type System with One Parameter

, 2019
A criterion for the unique existence of limit cycles of a Liénard-type system with one parameter is investigated. Our idea is to estimate the solution orbit starting from the initial point on some invariant domain.
M. Hayashi
semanticscholar   +1 more source

Dynamical Study of an SIQR Model with Saturated Incidence Rate

, 2016
In the present paper, we proposed and analyzed an SIQR compartment model. Determine the steady state of the model and Stability analysis is carried out.
Nidhi Nirwani, V. H. Badshah, R. Khandelwal   +2 more
semanticscholar   +1 more source

Modelling the effects of public health education in the spread of hepatitis B disease

, 2015
This paper presents a mathematical model that captures some essential dynamics of Hepatitis B transmission to study the impacts of public health educational campaign in preventing the disease.
N. Shaban
semanticscholar   +1 more source