Results 201 to 210 of about 4,832,623 (319)

From Stability to Chaos: A Complete Classification of the Damped Klein‐Gordon Dynamics

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT We investigate the transition between stability and chaos in the damped Klein‐Gordon equation, a fundamental model for wave propagation and energy dissipation. Using semigroup methods and spectral criteria, we derive explicit thresholds that determine when the system exhibits asymptotic stability and when it displays strong chaotic dynamics ...
Carlos Lizama   +2 more
wiley   +1 more source

Desarrollo rural: superando el desarrollo agrícola

open access: yes, 2011
Este libro propone dejar atrás la vieja tendencia de asociar el desarrollo rural únicamente con la modernización de los sistemas productivos agropecuarios y llevar este a un plano en el que tengan primacía los campesinos, así como la verdadera participación de ellos en la búsqueda y el rescate de su identidad; en tal sentido, sugiere que el objetivo de
openaire   +1 more source

Random Chemostats with Competition and Different Kinetics to Investigate the Growth of the Gut Microbiome

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT We investigate some chemostat models incorporating wall growth, competition, random fluctuations on the dilution rate, and different consumption functions (Monod and Haldane). We analyze the asymptotic behavior of the solutions of the corresponding random differential systems to establish conditions on the model parameters under which the ...
Javier López‐de‐la‐Cruz   +2 more
wiley   +1 more source

Informe de los Objetivos de Desarrollo Sostenible 2018

open access: yesInforme de los Objetivos de Desarrollo Sostenible, 2018

semanticscholar   +1 more source

Simulation‐Informed Evaluation of Microvascular Parameter Mapping for Diffusion MR Imaging of Solid Tumours

open access: yesMagnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose We aim to inform the design of new diffusion MRI (dMRI) approaches for microvasculature quantification that enhance the biological specificity of imaging towards cancer. Methods We adopted simulation‐informed modelling of the vascular dMRI signal. We synthesised signals from 1500 synthetic vascular networks, for a variety of protocols (
Anna Kira Voronova   +11 more
wiley   +1 more source

Trajectory Control of Manipulator Robots With Uncertainties: A Saturated Continuous Integral Sliding Mode Approach

open access: yesInternational Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study addresses the trajectory tracking control for manipulator robots with uncertainties. The main objective is to ensure that the robot follows a desired trajectory despite the presence of uncertainties/disturbances and considering control input constraints. The approach is developed in the framework of continuous integral sliding modes.
Emanuel Ortiz‐Ortiz   +3 more
wiley   +1 more source

Physical Fitness Cut‐Points for Early Detection of Obesity Risk in Preschool Children

open access: yesObesity, EarlyView.
ABSTRACT Objective This study aimed to establish cut‐points for cardiorespiratory fitness, muscular strength, and speed‐agility and to evaluate their ability to detect general and central obesity risk in preschool children aged 3–5 years. Methods Briefly, 3179 Spanish preschoolers (52.8% boys) were evaluated.
Maria Herrada‐Robles   +10 more
wiley   +1 more source

<i>Candida parapsilosis</i> in a case of canine otitis media. [PDF]

open access: yesMed Mycol Case Rep
Gómez-Barris BR   +5 more
europepmc   +1 more source

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