CV Lattes
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Universidade de São Paulo (USP). Instituto de Física (IF) (Institutional affiliation from the last research proposal) Birthplace: Brazil
Bachelor's at Physic from Universidade de São Paulo (1970), master's at Physic from Universidade de São Paulo (1973) and doctorate at Physic from Universidade de São Paulo (1979). Has experience in Physics, focusing on Physics of Fluids, Plasma Physics and Electrical Discharges, acting on the following subjects: tokamak, chaos, caos, turbulence and plasma edge. (Source: Lattes Curriculum)
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We will consider a control system that adjusts for electrical disturbances in real-time to suppress abnormal heart rhythms. Another system is related to the atmospheric dynamics of carbon dioxide (CO2). We will focus on control methods to reduce CO2 concentrations. (AU)
We will apply fundamental theories of chaos and turbulence to investigate the control of chaotic dynamical systems. For Hamiltonian systems, we will investigate the transition to chaos and the onset and break of transport barriers, as observed in magnetically confined plasmas, particle accelerators, and periodic potentials. We also will investigate the turbulence onset in magnetically con…
Transport phenomena in dynamical systems have been widely studied, with nonlinear effects crucial in understanding various transport processes. Turbulence, in particular, is an age-old issue in classical physics and has been the subject of intense research for several decades, encompassing a broad range of problems related to fluids, plasmas, and waves. Indeed, considerable effort has bee…
The complex system dynamics will be investigated in the context of machine learning. Initially, the synchronization of neuronal newtork and methods to suppress synchronous behavior. After that, the turbulence regimes in the Texas Helimak. (AU)
We will investigate the nonlinear dynamics, in a two-dimensional space of control parameters, of systems exhibiting quasi-periodic behaviors. Our main objective is to meticulously identify and characterize the transition scenarios to chaos involving quasi-periodicity (torus) and strange nonchaotic attractors. Additionally, we intend to examine the variations of periodic windows, includin…
(Only some records are available in English at this moment)
In this project, we will study the dynamic behavior of an epidemiological mathematical model capable of describing interspecies avian influenza, considering bird and human populations. It is a coupled compartmental model of the SI-SIR (Susceptible-Infected-Recovered) type, which has proven effective in adequately describing real cases. We aim to introduce control strategies into the model…
In this project, we study the dynamic behavior of a vector-host epidemiological model. In particular, we focus on the SI-SIR model (Susceptible-Infected coupled with Susceptible-Infected-Recovered) in its standard formulation as well as incorporating extensions through complex networks. In addition to the study of the fundamental mathematical properties of the model, we will apply it to r…
The tokamak is an important device for research in controlled nuclear fusion, where plasma is confined by magnetic fields to achieve the necessary conditions for fusion. In this project, using an analytic model of the equilibrium magnetic field obtained through polar toroidal coordinates, internal and external magnetic perturbations will be incorporated. Dynamic analysis, based on numeric…
(Only some records are available in English at this moment)
The modification of the radial profile of the electric field in magnetically confined plasmas will be investigated using an external electric potential (bias) to control turbulence and anomalous particle transport at the plasma edge in the Texas Helimak. The study will examine how different bias values affect plasma confinement. The methodology includes the analysis of time series of plas…
The efficiency of toroidal devices for plasma confinement, such as tokamaks and stellarators, is limited by turbulent processes and instabilities that can lead to magnetic field lines and charged particle escapes. To analyze the phenomena occurring during confinement, we can describe the systems using a Hamiltonian approach, reducing the problem to the study of symplectic maps. Different …
This project proposes to investigate transport phenomena in Hamiltonian systems with a high degree of freedom. The study will focus on symplectic networks of maps coupled in a non-local manner, where the coupling strength follows a power-law dependence on the distance within the network. This investigation will encompass both twist maps and non-twist maps. We will analyze diffusion as a f…
(Only some records are available in English at this moment)
One of the central problems in plasma physics is the loss of energy due to the escape of energetic particles in tokamaks. The characteristics of this escape are strongly influenced by the equilibrium configurations and by perturbations in the magnetic field and plasma current. These effects can be studied using Hamiltonian models for magnetic field lines, as carried out in the research pr…
This project proposes to investigate the dynamics and transport phenomena in Hamiltonian systems with many degrees of freedom. The study will focus on a lattice of coupled symplectic maps, where the coupling is non-local, and where the coupling strength follows a power-law dependence on the distance within the lattice. We will analyze diffusion as a function of network size and coupling s…
This project aims to investigate aspects related to turbulence phenomena in plasma confined within the TJ-II stellarator. The primary objective of this work is to evaluate how modifications in parameters, such as rotational transform and external bias, can serve as effective mechanisms for turbulence control. This study utilizes intermittency measures and entropy transfer analysis on exte…
Transport barriers in magnetically confined plasmas have been related to the vicinity of the extrema at equilibrium profiles. In addition, nontwist Hamiltonian models have been used associating nonmonotonic profiles to the so-called shearless transport barriers. Recently, nontwist systems with multiple shearless transport barriers appeared in experimental devices and associated Hamiltonia…
Symplectic maps are a useful tool to describe the behavior of magnetic field lines in plasmas confined within toroidal devices like Tokamaks. The efficiency of Tokamaks are inherently tied to the confinement improvement, which can be achieved by the transport barriers within the plasma and by the chaotic region formed on the edge by the employment of magnetic limiters. Both the barriers a…
Understanding the emergence of synchronous and asynchronous patterns in neuronal networks and how synaptic plasticity actuates in such patterns is still a challenge in the field of neuroscience. Synaptic plasticity and neuronal synchronization are involved in both healthy cognitive functions and neurological disorders like epilepsy, Alzheimer, and Parkinson. For this reason, understanding…
(Only some records are available in English at this moment)
| 2 / 2 | Ongoing grants |
| 26 / 17 | Completed research grants |
| 5 / 5 | Ongoing scholarships in Brazil |
| 49 / 27 | Completed scholarships in Brazil |
| 3 / 3 | Ongoing scholarships abroad |
| 17 / 14 | Completed scholarships abroad |
| 102 / 68 | All research grants and scholarships |
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