Zobrazeno 1 - 10
of 132
pro vyhledávání: '"ANDRADE, R. A. S."'
The effective reproduction number, R(t), is a central point in the study of infectious diseases. It establishes in an explicit way the extent of an epidemic spread process in a population. The current estimation methods for the time evolution of R(t)
Externí odkaz:
http://arxiv.org/abs/2102.12637
Autor:
Andrade, R. F. S., Souza, A. M. C.
Publikováno v:
Int. J. Mod. Phys. C 29, 1850098 (2018)
Properties of one dimensional discrete-time quantum walks are sensitive to the presence of inhomogeneities in the substrate, which can be generated by defining position dependent coin operators. Deterministic aperiodic sequences of two or more symbol
Externí odkaz:
http://arxiv.org/abs/1806.04041
A nearest-neighbor tight-binding model on a tree structure is investigated. The full energy spectrum of the normalized Hamiltonian can be expressed in terms of successively increasing number of contributions at any finite step of construction of the
Externí odkaz:
http://arxiv.org/abs/1710.10414
Publikováno v:
Scientific Reports 7, Article number: 1961 (2017)
Many examples of natural systems can be described by random Gaussian surfaces. Much can be learned by analyzing the Fourier expansion of the surfaces, from which it is possible to determine the corresponding Hurst exponent and consequently establish
Externí odkaz:
http://arxiv.org/abs/1708.09676
Publikováno v:
Phys. Rev. E 95, 042130 (2017)
We investigate the effect of the node degree and energy $E$ on the electronic wave function for regular and irregular structures, namely, regular lattices, disordered percolation clusters, and complex networks. We evaluate the dependence of the quant
Externí odkaz:
http://arxiv.org/abs/1606.00224
Akademický článek
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Publikováno v:
J. Phys.: Condens. Matter 26 445007 (2014)
This work considers the behavior of the height distributions of the equipotential lines in a region confined by two interfaces: a cathode with an irregular interface and a distant flat anode. Both boundaries, which are maintained at distinct and cons
Externí odkaz:
http://arxiv.org/abs/1408.0421
Autor:
Filho, C. I. N. Sampaio, Moreira, A. A., Andrade, R. F. S., Herrmann, H. J., Andrade Jr, J. S.
The increasing demands in security and reliability of infrastructures call for the optimal design of their embedded complex networks topologies. The following question then arises: what is the optimal layout to fulfill best all the demands? Here we p
Externí odkaz:
http://arxiv.org/abs/1406.7259
Autor:
Andrade, R. F. S., Herrmann, H. J.
This work presents an approach to evaluate the exact value of the fractal dimension of the cutting path $d^{CP}_f$ on hierarchical structures with finite order of ramification. This represents the first renormalization group treatment of the universa
Externí odkaz:
http://arxiv.org/abs/1303.0988
This work considers an Ising model on the Apollonian network, where the exchange constant $J_{i,j}\sim1/(k_ik_j)^\mu$ between two neighboring spins $(i,j)$ is a function of the degree $k$ of both spins. Using the exact geometrical construction rule f
Externí odkaz:
http://arxiv.org/abs/0811.3827