308 citations
- National ObservatoryBR74 papers
- Centro Brasileiro de Pesquisas FísicasBR28 papers
- Universidade de São PauloBR25 papers
- Centre National de la Recherche ScientifiqueFR24 papers
- Universidade Federal do Rio de JaneiroBR22 papers
- Tel Aviv UniversityIL20 papers
- Universidade Federal do Rio Grande do SulBR17 papers
- Petersburg Nuclear Physics InstituteRU16 papers
- European Organization for Nuclear ResearchCH15 papers
- Fundação de Amparo à Pesquisa do Estado de São PauloBR15 papers
- Instituto Superior TécnicoPT15 papers
- University of California, BerkeleyUS15 papers
8 papers · 1 filter
Long-range spatial correlations and fluctuation statistics of lightning activity rates in Brazil
H. V. Ribeiro, F. J. Antonio, L. G. A. Alves +2
We report on a statistical analysis of the lightning activity rates in all Brazilian cities. We find out that the average of lightning activity rates exhibit a dependence on the la…
Negative photoconductance in a biased multiquantum well with filter barriers
Anibal T. Bezerra, Marcelo Z. Maialle, Marcos H. Degani +2
In this paper the photon-assisted electron motion in a multiquantum well (MQW) semiconductor heterostructure in the presence of an electric field is investigated. The time-dependen…
Generation and control of spin-polarized photocurrents in GaMnAs heterostructures
Anibal T. Bezerra, Leonardo K. Castelano, Marcos H. Degani +3
Photocurrents are calculated for a specially designed GaMnAs semiconductor heterostructure. The results reveal regions in the infrared range of the energy spectrum in which the pro…
Nonlinear Boundary Value Problems via Minimization on Orlicz-Sobolev Spaces
J. V. Goncalves, M. L. M. Carvalho
We develop arguments on convexity and minimization of energy functionals on Orlicz-Sobolev spaces to investigate existence of solution to the equation $\displaystyle -\mbox{div} (ϕ…
Surfaces with parallel mean curvature in Sasakian space forms
Dorel Fetcu, Harold Rosenberg
We study the global geometry of surfaces in Sasakian space forms whose mean curvature vector is parallel in the normal bundle (these include the Riemannian Heisenberg space of dime…
The -version of the WRT-invariants, monochromatic 3-connected blinks and evidence for a conjecture on their induced 3-manifolds
Sóstenes L. Lins, Craig Hodgson, Lauro D. Lins +1
A {\em blink} is a plane graph with a bipartition (black, gray) of its edges. Subtle classes of blinks are in 1-1 correspondence with closed, oriented and connected 3-manifolds up…