Zobrazeno 1 - 10
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pro vyhledávání: '"Caldas, A."'
Exploring chaotic systems via Poincar\'e sections has proven essential in dynamical systems, yet measuring their characteristics poses challenges to identify the various dynamical regimes considered. In this paper, we propose a new approach that uses
Externí odkaz:
http://arxiv.org/abs/2409.13086
Nontwist area-preserving maps violate the twist condition at specific orbits, resulting in shearless invariant curves that prevent chaotic transport. Plasmas and fluids with nonmonotonic equilibrium profiles may be described using nontwist systems, w
Externí odkaz:
http://arxiv.org/abs/2409.00785
Autor:
Gabrick, Enrique C., Brugnago, Eduardo L., de Moraes, Ana L. R., Protachevicz, Paulo R., da Silva, Sidney T., Borges, Fernando S., Caldas, Iberê L., Batista, Antonio M., Kurths, Jürgen
In this work, effects of constant and time-dependent vaccination rates on the Susceptible-Exposed-Infected-Recovered-Susceptible (SEIRS) seasonal model are studied. Computing the Lyapunov exponent, we show that typical complex structures, such as shr
Externí odkaz:
http://arxiv.org/abs/2409.08293
Autor:
Leal, Bruno B., Lazarotto, Matheus J., Mugnaine, Michele, de Almeida, Alfredo M. Ozorio, Viana, Ricardo L., Caldas, Iberê L.
In nontwist systems, primary shearless curves act as barriers to chaotic transport. Surprisingly, the onset of secondary shearless curves has been reported in a few twist systems. Meanwhile, we found that, in twist systems, the onset of these seconda
Externí odkaz:
http://arxiv.org/abs/2408.10930
Autor:
Sales, Matheus Rolim, Mugnaine, Michele, Leonel, Edson Denis, Caldas, Iberê L., Szezech Jr, José Danilo
An interesting feature in dissipative nonlinear systems is the emergence of characteristic domains in parameter space that exhibit periodic temporal evolution, known as shrimp-shaped domains. We investigate the parameter space of the dissipative asym
Externí odkaz:
http://arxiv.org/abs/2408.07167
Autor:
Caldas, Ricardo D.
Resilient cyber-physical systems comprise computing systems able to continuously interact with the physical environment in which they operate, despite runtime errors. The term resilience refers to the ability to cope with unexpected inputs while deli
Externí odkaz:
http://arxiv.org/abs/2407.15562
A benchmark test was conducted for a new symplectic integration method originally developed by Molei Tao. The method raises interest due to its explicit evolution equation, with applicability to both separable and non-separable Hamiltonian systems, a
Externí odkaz:
http://arxiv.org/abs/2407.15970
We investigate the influence of the finite Larmor radius on the dynamics of guiding-center test particles subjected to an $\mathbf{E} \times \mathbf{B}$ drift in a large aspect-ratio tokamak. For that, we adopt the drift-wave test particle transport
Externí odkaz:
http://arxiv.org/abs/2407.15963
This paper proposes a new framework to design a controller for the dexterous manipulation of an object by a multi-fingered hand. To achieve a robust manipulation and wide range of operations, the uncertainties on the location of the contact point and
Externí odkaz:
http://arxiv.org/abs/2407.11392
Autor:
Caldas, Francisco, Soares, Cláudia
The increasing volume of space objects in Earth's orbit presents a significant challenge for Space Situational Awareness (SSA). And in particular, accurate orbit prediction is crucial to anticipate the position and velocity of space objects, for coll
Externí odkaz:
http://arxiv.org/abs/2407.11026