• Annealed Ising model with site dilution on self-similar structures 

  Silva, V. S. T.; Andrade, Roberto Fernandes Silva; Salinas, S. R. (Brasil, 2014)

  We consider an Ising model on the triangular Apollonian network (AN), with a thermalized distribution of vacant sites. The statistical problem is formulated in a grand canonical ensemble, in terms of the temperature T and ...
• Height distribution of equipotential lines in a region confined by a rough conducting boundary 

  Castro, C. P. de; Assis, Thiago Albuquerque de; Castilho, Caio Mário Castro de; Andrade, Roberto Fernandes Silva (Brasil, 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 ...
• Involutive constrained systems and Hamilton-Jacobi formalism 

  Bertin, M. C.; Pimentel, B. M.; Valcárcel, C. E. (Brasil, 2014)

  In this paper, we study singular systems with complete sets of involutive constraints. The aim is to establish, within the Hamilton-Jacobi theory, the relationship between the Frobenius’ theorem, the infinitesimal canonical ...
• Hybrid platforms of graphane–graphene 2D structures: prototypes for atomically precise nanoelectronics 

  Mota, F. de B.; Rivelino, Roberto; Medeiros, P. V. C.; Mascarenhas, A. J. S.; Castilho, Caio Mário Castro de (Brasil, 2014)

  First-principles calculations demonstrate that line/ribbon defects, resulting from a controlled dehydrogenation in graphane, lead to the formation of low-dimensional electron-rich tracks in a monolayer. The present simulations ...
• Depth of maximum of air-shower profiles at the Pierre Auger Observatory. I. Measurements at energies above 1017.8  eV 

  Abreu, P.; Aab, A.; Aglietta, M.; Ahn, E. J.; Samarai, I. Al; Albuquerque, Ivone Freire da Mota e; Allekotte, I.; Allen, J.; Pepe, Iuri Muniz (Brasil, 2014)

  We report a study of the distributions of the depth of maximum, Xmax, of extensive air-shower profiles with energies above 1017.8  eV as observed with the fluorescence telescopes of the Pierre Auger Observatory. The analysis ...
• Diretrizes curriculares da Educação Física: reformismo e subordinação ao mercado no processo de formação 

  Veronez, Luiz Fernando Camargo; Lemos, Lovane Maria; Morschbacher, Márcia; Both, Vilmar José (Brasil, 2013)

  As reformas educacionais ocorridas na década de 1990 objetivaram intervir na formação dos trabalhadores para torná-los aptos às demandas da mundialização do capital. Na área da Educação Física, as novas diretrizes curriculares ...
• Constraints on the origin of cosmic rays above 1018 ev from large-scale anisotropy searches in data of the Pierre Auger observatory 

  Pepe, Iuri Muniz; Abreu, P.; Aglietta, M.; Ahlers, M.; Ahn, E. J.; Albuquerque, Ivone Freire da Mota e; Allard, D.; Allekotte, I.; Allen, J. (2013)

  A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 1018 eV at the Pierre Auger Observatory is reported. For the first time, these large-scale anisotropy ...
• Stochastic dynamics of dengue epidemics 

  Souza, David R. de; Tomé, Tânia; Pinho, Suani Tavares Rubim de; Barreto, Florisneide Rodrigues; Oliveira, Mário J. de (Brasil, 2013)

  We use a stochastic Markovian dynamics approach to describe the spreading of vector-transmitted diseases, such as dengue, and the threshold of the disease. The coexistence space is composed of two structures representing ...
• Deformation method for generalized Abelian Higgs-Chern-Simons models 

  Losano, L.; Malbouisson, J. M. C.; Garci, D. Rubiera; Santos, C. dos (Brasil, 2013)

  We present an extension of the deformation method applied to self-dual solutions of generalized Abelian Higgs-Chern-Simons models. Starting from a model defined by a potential V (|phgr|) and a non-canonical kinetic term ...
• Spin-orbit interaction strength and anisotropy in III-V semiconductor heterojunctions 

  Sandoval, M. A. Toloza; Silva, A. Ferreira da; Silva, E. A. de Andrada e; Rocca, G. C. La (Brasil, 2013)

  The spin-orbit interaction strength for electrons in III-V semiconductor heterojunctions and the corresponding in-plane anisotropy are theoretically studied, considering Rashba and Dresselhaus contributions. Starting from ...
• Solutions for the landau problem using Symplectic representations of the Galilei group 

  Vianna, J. D. M.; Khanna, Faqir C.; Fernandes, M. C. B.; Amorim, Ronni G. G. (2013)

  Symplectic unitary representations for the Galilei group are studied. The formalism is based on the noncommutative structure of the star-product, and using group theory approach as a guide, a consistent physical theory in ...
• How fast do stock prices adjust to market efficiency? Evidence from a detrended fluctuation analysis 

  Reboredo, Juan C.; Castro, Miguel A. Rivera; Miranda, José Garcia Vivas; Rubio, Raquel García (2013)

  In this paper we analyse price fluctuations with the aim of measuring how long the market takes to adjust prices to weak-form efficiency, i.e., how long it takes for prices to adjust to a fractional Brownian motion with a ...
• Discrete time quantum walk on the Apollonian network 

  Souza, A. M. C.; Andrade, Roberto Fernandes Silva (2013)

  This work discusses the discrete time quantum walk (DTQW) on the first five generations of the Apollonian network. This structure is constructed in a geometric recurrent way and is characterized by, among other features, ...
• Exact evaluation of the cutting path length in a percolation model on a hierarchical network 

  Andrade, Roberto Fernandes Silva; Herrmann, H. J. (Brasil, 2013)

  This work presents an approach to evaluate the exact value of the fractal dimension of the cutting path dCPf on hierarchical structures with finite order of ramification. Our approach is based on a renormalization group ...
• A cosmological concordance model with dynamical vacuum term 

  Borges, Humberto de Almeida; Alcaniz, Jailson Souza de; Silva, Saulo Carneiro de Souza; Fabris, Júlio César; Pigozzo, Cássio Bruno Magalhães; Wilhelm, Zimdahl Winfried Ernst (2012)

  We demonstrate that creation of dark-matter particles at a constant rate implies the existence of a cosmological term that decays linearly with the Hubble rate. We discuss the cosmological model that arises in this context ...
• Comparison of methods for argo drifters data assimilation into a hydrodynamical model of the ocean 

  Tanajura, Clemente Augusto Souza; Tuchkova, N. P.; Belyaev, Konstantin Pavlovich (2012)

  Different data assimilation methods such as an extended Kalman filter, the optimal interpolation method, and a method based on the Fokker-Planck equation applications are considered. Data from the ARGO drifters are assimilated ...
• Statistical characterization of an ensemble of functional neural networks 

  Silva, B. B. M.; Miranda, José Garcia Vivas; Corso, G.; Copelli, M.; Vasconcelos, N.; Ribeiro, S.; Andrade, Roberto Fernandes Silva (2012)

  This work uses a complex network approach to analyze temporal sequences of electrophysiological signals of brain activity from freely behaving rats. A network node represents a neuron and a network link is included between ...
• The influence of large-scale circulation, transient and local processes on the seasonal circulation of the Eastern Brazilian Shelf, 13°S 

  Amorim, F. N.; Cirano, M.; Soares, I. D.; Campos, Edmo José Dias; Middleton, John F. (2012)

  The circulation at the Eastern Brazilian Shelf (EBS), near 13°S, is discussed in terms of the currents and hydrography, associating large-scale circulation, transient and local processes to establish a regional picture of ...
• Statistical characterization of an ensemble of functional neural networks 

  Silva, B. B. M.; Miranda, José Garcia Vivas; Andrade, Roberto Fernandes Silva; Corso, G.; Copelli, M.; Vasconcelos, N.; Ribeiro, S. (2012)

  This work uses a complex network approach to analyze temporal sequences of electrophysiological signals of brain activity from freely behaving rats. A network node represents a neuron and a network link is included between ...
• Mesoscopic spin-orbit effect in the semiconductor nanostructure electron g factor 

  Sandoval, M. A. Toloza; Silva, A. Ferreira da; Silva, E. A. de Andrada e; Rocca, G. C. La (Brasil, 2012)

  The renormalization of the electron g factor by the confining potential in semiconductor nanostructures is considered. A new effective k⋅p Hamiltonian for the electronic states in III–V semiconductor nanostructures in the ...

Más