Zobrazeno 1 - 10
of 810
pro vyhledávání: '"Ervin K"'
Autor:
Derik W. Gryczak, Ervin K. Lenzi, Michely P. Rosseto, Luiz R. Evangelista, Luciano R. da Silva, Marcelo K. Lenzi, Rafael S. Zola
Publikováno v:
Fluids, Vol 9, Iss 10, p 221 (2024)
We investigate the diffusion phenomenon of particles in the vicinity of a spherical colloidal particle where particles may be adsorbed/desorbed and react on the surface of the colloidal particle. The mathematical model comprises a generalized diffusi
Externí odkaz:
https://doaj.org/article/137c6b9b95fe42a889729af649cce598
Autor:
Ervin K. Lenzi, Michely P. Rosseto, Derik W. Gryczak, Luiz R. Evangelista, Luciano R. da Silva, Marcelo K. Lenzi, Rafael S. Zola
Publikováno v:
Entropy, Vol 26, Iss 8, p 673 (2024)
We investigate the H-theorem for a class of generalized kinetic equations with fractional time-derivative, hyperbolic term, and nonlinear diffusion. When the H-theorem is satisfied, we demonstrate that different entropic forms may emerge due to the e
Externí odkaz:
https://doaj.org/article/4d40c6384f7f4645afec1753e9711825
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-11 (2023)
Abstract Heterogeneous media diffusion is often described using position-dependent diffusion coefficients and estimated indirectly through mean squared displacement in experiments. This approach may overlook other mechanisms and their interaction wit
Externí odkaz:
https://doaj.org/article/2900e84fe3eb428b9a430e2e7435c2a3
Autor:
Ervin K. Lenzi, Enrique C. Gabrick, Elaheh Sayari, Antonio S. M. de Castro, José Trobia, Antonio M. Batista
Publikováno v:
Quantum Reports, Vol 5, Iss 2, Pp 442-458 (2023)
We investigate a three-level system in the context of the fractional Schrödinger equation by considering fractional differential operators in time and space, which promote anomalous relaxations and spreading of the wave packet. We first consider the
Externí odkaz:
https://doaj.org/article/1e997d0bef374d639f9cbc00ff4f2f6a
Publikováno v:
Fractal and Fractional, Vol 8, Iss 7, p 369 (2024)
Many fundamental physical problems are modeled using differential equations, describing time- and space-dependent variables from conservation laws. Practical problems, such as surface morphology, particle interactions, and memory effects, reveal the
Externí odkaz:
https://doaj.org/article/06910e52a241481e97268e1ff5d3b294
Autor:
Giuliano G. La Guardia, Jocemar Q. Chagas, Ervin K. Lenzi, Leonardo Pires, Nicolás Zumelzu, Benjamín Bedregal
Publikováno v:
Axioms, Vol 13, Iss 5, p 308 (2024)
In this paper, we expand the theory of semi-vector spaces and semi-algebras, both over the semi-field of nonnegative real numbers R0+. More precisely, we prove several new results concerning these theories. We introduce to the literature the concept
Externí odkaz:
https://doaj.org/article/0802f209f420461a9001812f8d2fb1b0
Autor:
Renato F. de Souza, Roberta R. Ribeiro de Almeida, Eric K. Omori, Rodolfo T. de Souza, Ervin K. Lenzi, Luiz R. Evangelista, Rafael S. Zola
Publikováno v:
Physchem, Vol 3, Iss 1, Pp 1-12 (2022)
In this work, we investigate the effect of the number of available adsorption sites for diffusing particles in a liquid confined between walls where the adsorption (desorption) phenomena occur. We formulate and numerically solve a model for particles
Externí odkaz:
https://doaj.org/article/e91932f4707547bb8a222a3330303446
Publikováno v:
Entropy, Vol 26, Iss 4, p 294 (2024)
The interplay of diffusion with phenomena like stochastic adsorption–desorption, absorption, and reaction–diffusion is essential for life and manifests in diverse natural contexts. Many factors must be considered, including geometry, dimensionali
Externí odkaz:
https://doaj.org/article/8ba0da1dffa94966916fe3f1bad20f19
Autor:
Enrique C. Gabrick, Paulo R. Protachevicz, Diogo L. M. Souza, José Trobia, Elaheh Sayari, Fernando S. Borges, Marcelo K. Lenzi, Iberê L. Caldas, Antonio M. Batista, Ervin K. Lenzi
Publikováno v:
Fractal and Fractional, Vol 8, Iss 3, p 143 (2024)
We investigate the transient dynamics of the Fisher equation under nonlinear diffusion and fractional operators. Firstly, we investigate the effects of the nonlinear diffusivity parameter in the integer-order Fisher equation, by considering a Gaussia
Externí odkaz:
https://doaj.org/article/84d9395598e74d24926463b9cf4157b8
Autor:
Diego D. Lopes, Bruno R. da Cunha, Alvaro F. Martins, Sebastián Gonçalves, Ervin K. Lenzi, Quentin S. Hanley, Matjaž Perc, Haroldo V. Ribeiro
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract Recent research has shown that criminal networks have complex organizational structures, but whether this can be used to predict static and dynamic properties of criminal networks remains little explored. Here, by combining graph representat
Externí odkaz:
https://doaj.org/article/68fcc539bfd841be9e4ebad3c8ed80ae