Zobrazeno 1 - 10
of 345
pro vyhledávání: '"Machado, Fábio"'
We consider a system of interacting random walks known as the frog model. Let $\mathcal{K}_n=(\mathcal{V}_n,\mathcal{E}_n)$ be the complete graph with $n$ vertices and $o\in\mathcal{V}_n$ be a special vertex called the root. Initially, $1+\eta_o$ act
Externí odkaz:
http://arxiv.org/abs/2407.19027
We consider the dynamics of a population spatially structured in colonies that are vulnerable to catastrophic events occurring at random times, which randomly reduce their population size and compel survivors to disperse to neighboring areas. The dis
Externí odkaz:
http://arxiv.org/abs/2407.14654
We consider two simple stochastic models for a pathogen population in the presence of an immune response, where we assume that the immune system must first get rid of the pathogen type with the lowest fitness in each ancestral lineage of pathogen typ
Externí odkaz:
http://arxiv.org/abs/2404.17950
We introduce the following model for the evolution of a population. At every discrete time $j\geq 0$ exactly one individual is introduced in the population and is assigned a death probability $c_j$ sampled from $C$, a fixed probability distribution.
Externí odkaz:
http://arxiv.org/abs/2307.09940
Autor:
Pedrini, Cibeli Almeida1 (AUTHOR) ffabiomachado@hotmail.com, Machado, Fábio Souza1 (AUTHOR) alexandrefernandes@ufgd.edu.br, Fernandes, Alexandre Rodrigo Mendes1 (AUTHOR), Cônsolo, Nara Regina Brandão2 (AUTHOR) nara.consolo@usp.br, Ocampos, Fernanda Maria Marins2 (AUTHOR) fmmocampos@gmail.com, Colnago, Luiz Alberto3 (AUTHOR) luiz.colnago@embrapa.br, Perdigão, Alexandre4 (AUTHOR) alexandre.perdigao@dsm-firmenich.com, de Carvalho, Victor Valério4 (AUTHOR) victor.carvalho@dsm-firmenich.com, Acedo, Tiago Sabella4 (AUTHOR) tiago.acedo@dsm-firmenich.com, Tamassia, Luis Fernando Monteiro4 (AUTHOR) luis.tamassia@dsm-firmenich.com, Kindermann, Maik4 (AUTHOR) maik.kindermann@dsm-firmenich.com, Gandra, Jefferson Rodrigues5 (AUTHOR) cibeli_almeida@hotmail.com
Publikováno v:
Animals (2076-2615). Sep2024, Vol. 14 Issue 17, p2576. 22p.
We consider a discrete time population model for which each individual alive at time $n$ survives independently of everybody else at time $n+1$ with probability $\beta_n$. The sequence $(\beta_n)$ is i.i.d. and constitutes our random environment. Mor
Externí odkaz:
http://arxiv.org/abs/2211.14193
The frog model is a system of interacting random walks. Initially, there is one particle at each vertex of a connected graph $\mathcal{G}$. All particles are inactive at time zero, except for the one which is placed at the root of $\mathcal{G}$, whic
Externí odkaz:
http://arxiv.org/abs/2210.04968
Recently, different dispersion strategies in population models subject to geometric catastrophes have been considered as strategies to improve the chance of po\-pu\-lation's survival. Such dispersion strategies have been contrasted with the strategy
Externí odkaz:
http://arxiv.org/abs/2109.10997
We consider stochastic growth models to represent population dynamics subject to geometric catastrophes. We analyze different dispersion schemes after catastrophes, to study how these schemes impact the population viability and comparing them with th
Externí odkaz:
http://arxiv.org/abs/2012.12027
Autor:
Moreira, Giovanni, Ernesto, Marcia, De Min, Angelo, Marzoli, Andrea, Machado, Fábio Braz, Vasconcellos, Eleonora Maria Gouvea, Bellieni, Giuliano
Publikováno v:
In Physics of the Earth and Planetary Interiors September 2023 342