Results 71 to 80 of about 334,309 (266)

An approach to logical-mathematical computer modeling of linear and nonlinear dynamical systems [PDF]

E3S Web of Conferences
The paper deals with the problem of modeling linear and nonlinear dynamical systems using information technologies and programming. The processes of modeling, synthesis and inference of solutions to problems are considered, and the possibility of their ...
Zaytsev Anatoly, Kravchenko Vyacheslav, Shirapov Dashadondok   +2 more
doaj   +1 more source

A Discrete Mathematical Modeling of the Influence of Alcohol Treatment Centers on the Drinking Dynamics Using Optimal Control

Journal of Applied Mathematics, 2020
In this paper, we propose a discrete mathematical model that describes the interaction between the classes of drinkers, namely, potential drinkers P, moderate drinkers M, heavy drinkers H, poor heavy drinkers Tp, rich heavy drinkers Tr, and quitters of ...
Bouchaib Khajji, Abderrahim Labzai, Abdelfatah Kouidere, Omar Balatif, Mostafa Rachik   +4 more
doaj   +1 more source

On positive solutions and the Omega limit set for a class of delay differential equations

, 2012
This paper studies the positive solutions of a class of delay differential equations with two delays. These equations originate from the modeling of hematopoietic cell populations. We give a sufficient condition on the initial function for $t\leq 0$ such
B. Dorizzi, C. Colijn, C. Colijn, C. Colijn, D. L. Bellman, J. Adamson, J. Bélair, J. C. Sprott, J. Lei, J. Lei, J. Lei, J. Mahaffy, M. C. Mackey, M. Silva, S. A. Gourley, S. Bernard   +15 more
core   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Mathematical Modeling and Analysis of an Alcohol Drinking Model with the Influence of Alcohol Treatment Centers

International Journal of Mathematics and Mathematical Sciences, 2020
In this paper, we present a continuous mathematical model PMHTrTpQ of alcohol drinking with the influence of private and public addiction treatment centers.
Bouchaib Khajji, Abderrahim Labzai, Omar Balatif, Mostafa Rachik   +3 more
doaj   +1 more source

Stability of networks of delay-coupled delay oscillators

, 2011
Dynamical networks with time delays can pose a considerable challenge for mathematical analysis. Here, we extend the approach of generalized modeling to investigate the stability of large networks of delay-coupled delay oscillators.
Gross, Thilo, Höfener, Johannes M., Sethia, Gautam C.   +2 more
core   +1 more source

Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?

FEBS Letters, EarlyView.
This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes, Guilherme M. Azevedo, Amanda P. Barcellos, Diana Bahia   +3 more
wiley   +1 more source

Improving dynamical climate predictions with machine learning: insights from a twin experiment framework [PDF]

Nonlinear Processes in Geophysics
Systematic errors in dynamical climate models remain a significant challenge to accurate climate predictions, particularly when modeling the nonlinear coupling between the atmosphere and ocean.
Z. He, Z. He, Z. He, J. Brajard, Y. Wang, X. Wang, X. Wang, Z. Shen, Z. Shen   +8 more
doaj   +1 more source

Mathematical Modeling and Optimal Control Strategy for a Discrete Time Drug Consumption Model

Discrete Dynamics in Nature and Society, 2020
The aim of this paper is to study and investigate the optimal control strategy of a discrete mathematical model of drug consumption. The population that we are going to study is divided into six compartments: potential drug users, light drug users, heavy
Abderrahim Labzai, Abdelfatah Kouidere, Bouchaib Khajji, Omar Balatif, Mostafa Rachik   +4 more
doaj   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source