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Cezaro, Adriano de
(2012)
We investigate a level-set type method for solving ill-posed problems, with the assumption that the solutions are piecewise, but not necessarily constant functions with unknown level sets and unknown level values. In order ...
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Cezaro, Adriano de; Leitão, Antônio; Tai, Xue-Cheng
(2009)
We propose a regularization method for solving ill-posed problems, under the assumption that the solutions are piecewise constant functions with unknown level sets and unknown level values. A level set framework is established ...
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Cezaro, Adriano de; Leitão, Antônio; Tai, Xue-Cheng
(2009)
We analyze a multiple level-set method for solving inverse problems with piecewise constant solutions. This method corresponds to an iterated Tikhonov method for a particular Tikhonov functional Gα based on TV–H1 penalization. ...
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Cezaro, Adriano de; Leitão, Antônio; Tai, Xue-Cheng
(2013)
We investigate level-set-type methods for solving ill-posed problems with discontinuous (piecewise constant) coefficients. The goal is to identify the level sets as well as the level values of an unknown parameter function ...
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Cezaro, Adriano de; Haltmeier, Markus; Leitão, Antônio; Scherzer, Otmar
(2008)
We investigate modified steepest-descent methods coupled with a loping Kaczmarz strategy for obtaining stable solutions of nonlinear systems of ill-posed operator equations. We show that the proposed method is a convergent ...
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Monteiro, Igor Oliveira; Marques, Wiliam Correa; Fernandes, Elisa Helena Leão; Möller Junior, Osmar Olinto
(2011)
The Patos Lagoon is located in the southernmost part of Brazil, between 30u–32u S and 50u–52u W, being connected to the South Atlantic Ocean via a narrow channel that is less than 1 km wide. The lagoon drains a hydrographic ...
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Matsas, George Emanuel Avraam; Silva, André Ricardo Rocha da
(2007)
We examine a nearly extreme macroscopic Reissner-Nordstrom black hole in the context of semiclassical gravity. The absorption rate associated with the quantum tunneling process of scalar particles whereby this black hole ...
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Zhu, Shi-Lin; Maekawa, Claudio Masumi; Holstein, Barry; Ramsey-Musolf, Michael
(2001)
We analyze the degree to which parity-violating ~PV! electroexcitation of the D(1232) resonance may be used to extract the weak neutral axial vector transition form factors. We find that the axial vector electroweak radiative ...
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Grassi, Frédérico; Hama, Yogiro; Kodama, Takeshi; Socolowski Junior, Otavio
(2004)
We show that a hydrodynamical model with continuous particle emission instead of sudden freeze out may explain both the observed strange particle and pion
abundances and transverse mass spectra for light projectile at SPS ...
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Salvador, Juan Segundo Valverde; Santos, Onofre Rojas; Souza, Sergio Martins de
(2008)
The asymmetric tetrahedron is composed of all edges of a tetrahedron represented by Ising interactions except for one, which has a Heisenberg-type interaction. This asymmetric tetrahedron is arranged by connecting a vertex ...
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Dalla Rosa, Luciano; Secchi, Eduardo Resende; Kinas, Paul Gerhard; Santos, Marcos César de Oliveira; Martins, Marcio; Zerbini, Alexandre Novaes; Bethlem, Cláudia
(2001)
During three Summer seasons (1997/98-1999/00), photographic sampling of humpback whales was conducted by Projeto Baleia/Brazilian Antartic Programme in Waters of the Antartic Peninsula. Whales photographed totalled: 63 ...
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Reisser, Júlia Wiener; Proietti, Maíra Carneiro; Kinas, Paul Gerhard; Sazima, Ivan
(2008)
Recognition of individual sea turtles is mostly achieved by checking artificial tags previously attached to them, a method which is made difficult by the considerable tag loss rate and which requires repeated manipulation ...
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Ramos, Edson Marcos Leal Soares; Konrath, Andrea Cristina; Samohyl, Robert Wayne
(2002)
The principal objective of this paper is to offer a quantitative methodology for making forecasts to be used as an essential ingredient for MRP. The forecasts are for an individual product and for the very short-term, which ...
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Damet, Jérôme; Gunnar, Ingelman; Mariotto, Cristiano Brenner
(2002)
Models with essential non-perturbative QCD dynamics for the production of charmonium are extrapolated to give predictions of prompt J=Ã production at the LHC. Di®erences of up to an order of magnitude occurs, although the ...
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Bertti, Caroline Vanessa Bauman; Silveira, Alexsandro Neves; Dytz, Aline Guerra; Arashiro, Everaldo
(2023)
Este trabalho foi aplicado de forma a demonstrar a meia-vida radioativa no processo de decaimento radioativo, de maneira lúdica e descontraída com uso de poliedros, contemplando tópicos de Física Moderna no Ensino Médio. ...
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Figueiredo, Vera Lúcia Marques de; Mattos, Viviane Leite Dias de; Pasquali, Luis; Freire, Aline Poester
(2008)
O aperfeiçoamento de um teste se dá através da seleção, substituição ou revisão de itens, e quando um item é analisado, aumenta a validade e precisão do teste. Este artigo trata da apresentação dos resultados relativos às ...
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Sifuentes, Rodolfo Alvan Casana; Pazetti, Márcio; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde
(2009)
We give an action for the massless spinning particle in pseudoclassical mechanics by using grassmann variables. The constructed action is invariant under _-reparametrizations, local SUSY and O(N) transformations. After ...
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Quian, Wei Liang; Andrade, Rone Peterson Galvão de; Socolowski Junior, Otavio; Grassi, Frédérico; Kodama, Takeshi; Hama, Yogiro
(2007)
The transverse momentum distributions of hadrons in 200GeV Au-Au collisions at RHIC are calculated using the smoothed particle hydrodynamics code SPheRIO. They are compared with data from STAR and PHOBOS
Collaborations. ...
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Ducati, Maria Beatriz de Leone Gay; Gonçalves, Victor Paulo Barros; Mackedanz, Luiz Fernando
(2007)
The discovery of the jet quenching in central Au + Au collisions at the Relativistic Heavyion Collider (RHIC) at Brookhaven National Laboratory has provided clear evidence for the formation of strongly interacting dense ...
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Góes, Evamberto Garcia de; Covas, Dimas Tadeu; Haddad, Rodrigo; Pelá, Carlos Alberto; Formigoni, Carlos Eduardo; Borges, José Carlos
(2004)
Background and Objectives
Irradiation of whole blood and blood components before transfusion is currently the only accepted methodology to prevent transfusionassociated graft-vs.-host disease. In the present work, we ...