Results 61 to 70 of about 9,147,708 (269)

Existence of Crossing Periodic Solutions of a Duffing Equation with Discontinuity

open access: yesMathematics
Classical periodic solution theories of undamped Duffing equations are mostly restricted to continuous nonlinearities, while discontinuous models from mechanical impact and switching circuits lack systematic existence criteria for crossing periodic ...
Luming Li, Fangfang Jiang
doaj   +1 more source

Numerical analysis of dynamical systems with codimension two singularities [PDF]

open access: yes, 2009
Páez Chávez JN. Numerical analysis of dynamical systems with codimension two singularities.
Páez Chávez, Joseph Nikolai
core  

Artificial molecular machines and motors—Design and control of nanoscale motion

open access: yesFEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Large deviations in non-uniformly hyperbolic dynamical systems

open access: yes, 2008
The published version is located at http://fpbmonitor.com/action/displayAbstract?fromPage=online&aid=1825324&next=true&jid=ETS&volumeId=28&issueId=02We prove large deviation principles for ergodic averages of dynamical systems admitting Markov tower ...
Rey-Bellet, L, Young, LS
core   +3 more sources

Convergence of renormalisation and rigidity of dynamical systems [PDF]

open access: yes
Motivated by problems in the theory of renormalisation of dynamical systems, we study the properties of Markov families and fractals defined by embedded trees. Our main results concern the classification of Ck+a structures.
Pinto, Alberto A.
core  

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Non-autonomous dynamical systems

open access: yes, 2015
This review paper treats the dynamics of non-autonomous dynamical systems. To study the forwards asymptotic behaviour of a non-autonomous differential equation we need to analyse the asymptotic configurations of the non-autonomous terms present in the ...
Langa, José A.   +2 more
core   +1 more source

Metastasis on pause: How dormant tumor cells stay hidden within the tumor microenvironment and evade immune surveillance

open access: yesMolecular Oncology, EarlyView.
Dormant cancer cells can hide in distant organs for years, evading treatment and the immune system. This review highlights how signals from the surrounding tissue and immune environment keep these cells inactive or trigger their reawakening. Understanding these mechanisms may help develop therapies to eliminate or control dormant cells and prevent ...
Kanishka Tiwary   +1 more
wiley   +1 more source

Targeted Calibration to Adjust Stability Biases in Complex Dynamical System Models

open access: yesPhysical Review X
Models of complex dynamical systems like the Earth’s climate often involve large numbers of uncertain parameters. Comprehensive exploration of the parameter space is typically prohibitive due to excessive computational costs, and systematic gradient ...
Daniel Pals   +4 more
doaj   +1 more source

Gradient Infinite-Dimensional Random Dynamical Systems [PDF]

open access: yes, 2012
In this paper we introduce the concept of a gradient random dynamical system as a random semiflow possessing a continuous random Lyapunov function which describes the asymptotic regime of the system.
Caraballo Garrido, Tomás   +2 more
core   +1 more source

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