A5061762160- Mathematical and Theoretical Epidemiology and Ecology Models
- Nonlinear Dynamics and Pattern Formation
- COVID-19 epidemiological studies
- Neural dynamics and brain function
- Chaos control and synchronization
- Advancements in PLL and VCO Technologies
- stochastic dynamics and bifurcation
- Evolutionary Game Theory and Cooperation
- Opinion Dynamics and Social Influence
- Evolution and Genetic Dynamics
- Mental Health Research Topics
- Complex Network Analysis Techniques
- Magnetic confinement fusion research
- Neural Networks and Applications
- Network Time Synchronization Technologies
- Physiological and biochemical adaptations
- Quantum chaos and dynamical systems
- Optical Network Technologies
- Chaos-based Image/Signal Encryption
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Gene Regulatory Network Analysis
- Mosquito-borne diseases and control
- Fractal and DNA sequence analysis
- Photoreceptor and optogenetics research
Universidade de São Paulo
2015-2024
Universidade Presbiteriana Mackenzie
2015-2024
Universidade Federal Fluminense
2021
Fundação de Apoio a Pesquisa do Estado de Goiás
2016-2019
Universidade Federal dos Vales do Jequitinhonha e Mucuri
2019
Universidade Politecnica
2013-2017
Universidade Federal de Goiás
2016-2017
Ocera Therapeutics (United States)
2016
Ordem dos Médicos
2016
Center of Applied Ecology & Sustainability
2016
To investigate the use of classical epidemiological models for studying computer virus propagation we described analogies between and population disease using SIR (Susceptible-Infected-Removed) models. By modifying these with introduction anti-viral individuals analyzed stability free equilibrium points. Consequently, basal reproduction rate gives some theoretical hints about how to avoid infections in a network. Numerical simulations show dynamics process several parameter values giving...
We study the influence of double-frequency term in operation nonlinear second-order phase-locked loop (PLL). show that oscillations around synchronous state obtained from simplified models are unavoidable and we give, analytical graphical form, an approximated expression how amplitude depends on normalized gain. Numerical simulations confirm results providing some hints about to set PLL
Q10 factors are widely used as indicators of the magnitude temperature-induced changes in physico–chemical and physiological rates. However, there is a long–standing debate concerning extent to which values can be derive conclusions about energy metabolism regulatory control. The main point this disagreement whether or not it fair use concepts derived from molecular theory integrative responses living organisms. We address using dynamic systems theory, analyse behaviour model at organismal...
A hallmark of aging-related organ deterioration is a dysregulated immune response characterized by pathologic leukocyte infiltration affected tissues. Mechanisms and genes involved are as yet unknown. To identify associated with renal infiltration, we analyzed kidneys from aged mice (≥20 strains) for infiltrating leukocytes followed Haplotype Association Mapping (HAM) analysis. Immunohistochemistry revealed CD45+ cell clusters (predominantly T B cells) in perivascular areas coinciding PNAd+...
<abstract><p>Small-world networks and scale-free are well-known theoretical models within the realm of complex graphs. These exhibit "low" average shortest-path length; however, key distinctions observed in their degree distributions clustering coefficients: small-world networks, distribution is bell-shaped "high"; follows a power law "low". Here, model for generating graphs with "high" numerically explored, since these features concurrently identified representing social...
Due to the broadband characteristic of chaotic signals, many methods that have been proposed for synchronizing systems do not usually present a satisfactory performance when applied bandlimited communication channels. Here, effects bandwidth limitations imposed by channel on synchronous solution discrete-time master-slave network are investigated. The system considered in this study is Hénon map. It analytically shown synchronism can be achieved such introducing digital filter feedback loop...
Second-order phase-locked loops (PLLs) are extensively used in applications related to recovering clock signals for synchronous demodulation telecommunication networks. In situations where an improvement of the transient response local clocks is necessary, third-order PLLs employed. Here, we use concepts taken from dynamical system theory analytically determining capture range three nonlinear subject a ramp input. We show that saddle-node, saddle-saddle, and Hopf bifurcations can be produced...
A computational model based on game theory is here proposed to forecast the prevalence of depression caused by frustration in a competitive environment. This comprises spatially structured game, which individuals are socially connected. equivalent well-known prisoner’s dilemma, represents payoffs that can be received labor market. These may or not have invested formal academic education. It assumed an individual becomes depressed when difference between average payoff earned neighbors this...
The dynamics of a phase-locked loop (PLL), an essential component for the electronic synchronization processes, is described by ordinary nonlinear differential equation with order equal to 1 plus its internal linear low-pass filter. Literature contains several results mainly concerned second-order loops giving expressions lock-in range and transient response specifying equivalent system. However, in some applications, more accurate responses are necessary PLL performance can be improved...
A new System of co-ordinates is found and a method developed to determine the toroidal equilibrium plasmas with arbitrary current distribution plasma cross-section. The depends on knowledge straight column similar cross-section distribution. large aspect ratio assumed. By successive approximations, better solutions can be obtained. An explicit formula presented for poloidal flux nearly circular plasma. This written in terms function related asymmetry field due toroidality. works provided...
Phase-locked loops (PLLs) are designed to extract timing signals in telecommunication networks. Noise, cross-talk, inter-symbol interference, quantization noise, and signal distortion responsible for oscillations the time between two successive transitions of clock or data signal. It appears as an accidental phase modulation superposed original This phenomenon is called jitter affects integrity recovering process and, a consequence, error bit rate increased. problem has been studied by...
Distribution of precise time signals among the nodes a network is fundamental requirement for digital transmission and switching systems in telecommunication control. Cideciyan et al., (1987) conjectured that two-way master-slave (TWMS) networks present, general case, better performance than one-way (OWMS) considering long term linear master frequency drift. In this work we study TWMS case using dynamical system theory showing that, due to effects long-term clock instabilities, steady-state...
The Frank-Starling Law of the heart is a filling-force mechanism (FFm), positive relationship between distension ventricular chamber and its force ejection, such found across all studied vertebrate lineages. functioning cardiovascular system usually described by means cardiac vascular functions, former related to contractility latter after-load imposed ventricle. crossing these functions so-called operation point, FFm supposed play stabilizing role for short-term variations in working...