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Rio de Janeiro, Brazil

Rio de Janeiro State University is one of the largest universities in Brazil. The university's law school is among the best in the country.Its main campus is located at Francisco Negrão de Lima in the Maracanã neighborhood of Rio de Janeiro city. Other campuses can found at: Nova Friburgo , Duque de Caxias, Ilha Grande, Resende, Teresópolis, and São Gonçalo. Wikipedia.

Bassini A.,State University of Rio de Janeiro
Biochemical and Biophysical Research Communications | Year: 2014

For more than a decade, we have used alternative approaches to understand metabolic responses to physical stress. In addition to classic laboratory studies (cell and animal models), we have used elite athletes and sports to examine metabolic stress. Our central question involves the ability of the body to protect the central nervous system from high and toxic ammonemia during acute and chronic exercise. Information about this problem can aid in understanding important signaling pathways, which may yield better ways to protect people who suffer from diseases that lead to hyperammonemia, such as liver failure, or to hypermetabolic states, such as cancer or thermal injury. We proposed a Sportomics approach to mimic the real challenges and conditions that are faced during sports training and competition. Sportomics is non-hypothesis-driven research on an individual's metabolite changes during sports and exercise. It is similar to metabolomics and other "-omics" approaches, but Sportomics focuses on sports as a metabolic challenge. Our study is holistic and top-down; we treat the data systematically and have generated a large computer-searchable database. We also propose that in-field metabolic analyses are important for understanding, supporting and training elite athletes. In this review, we discuss Sportomics history, problems, benefits and results. We included different weather conditions, such as temperature, wind and humidity, and diverse metabolic responses due to uneven sleep and eating behaviors near the time of the experiment. We are currently generating databases as well as data-mining principles and procedures to improve metabolomics and proteomics studies as well as adding genomics and transcriptomics studies to the Sportomics approach. We believe that this approach can fill a methodological gap between systems biology and translational medicine similar as a bench to the field approach. © 2014 The Authors. Published by Elsevier Inc.

Garcia de Andrade L.C.,State University of Rio de Janeiro
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2011

Campanelli et al. (2009) [9] have recently shown that electromagnetic fluctuations in Lorentz violation theories Colladay and Kostelecky (1998) [8] along differential rotation may induce galactic dynamo amplification of magnetic fields from primordial seeds. In this Letter, instead of using the Maxwell-Chern-Simmons-Lagrangian used in their paper, one adopts the Lagrangean of the type RijklFijFkl, where Rijkl represent the torsion modes, without dynamical curvature. This so-called Minkowski-Cartan spacetime M4 torsion modes, allows us to handle QED vacuum in any Ricci scalar electrodynamics Lagrangean. It is shown that axial-torsion modes electrodynamics allows us to obtain a slow decay of magnetic fields. Thus primordial seed fields are amplified from differential rotation and protogalaxy turbulence as galactic dynamo action. This is mainly due to the fact that the collapse of the protogalaxy induces a strong suppression of the magnetic field decay. Magnetic field anisotropies are also considered. To resume, photon-torsion axial coupling in the quantum electrodynamics (QED) framework in Riemann flat contortioned spacetime may induce galactic dynamos. Fourier space transformation are used to compute electrodynamic equations. © 2010 Elsevier B.V.

Garcia de Andrade L.C.,State University of Rio de Janeiro
Nuclear Physics B | Year: 2011

A. Kostelecky et al. [Phys. Rev. Lett. 100 (2008) 111102], have shown that there is an exceptional sensitivity of spacetime torsion components by coupling it to fermions and constraining it to Lorentz violation. They obtain new constraints on torsion components down to the level of 10-31 GeV. Yet more recently, L.C. Garcia de Andrade [Phys. Lett. B 468 (2011) 28] has shown that the photon sector of Lorentz violation (LV) Lagrangian leads to linear non-standard Maxwell equations where the magnetic field decays slower giving rise to a seed for galactic dynamos. In this paper bounds are placed on torsion based on the magnetogenesis or the origin of magnetic fields in the universe. On a coherence scale of 10 kpc, galactic magnetic fields of the order of some μG yield a torsion primordial field of the order of K0≈10-48 GeV. Just to give an idea of how tiny it is we mention that torsion limit in the Early universe yield K0≈10-31 GeV had been obtained by V. de Sabbata and C. Sivaram. Good limits were also obtained by B.R. Heckel et al. [Phys. Rev. D 78 (2008) 092006]. In our case the advantage from astro-particle physics point of view, is that a very small seed torsion field is enough to seed galactic dynamo. C. Sivaram limit is obtained from a massive photon electrodynamics [L.C. Garcia de Andrade, C. Sivaram, Ap. Space Sci. 209 (1993) 109] where a gauge invariant electrodynamics is used. Dynamo stars data are able to raise this value of torsion up to 10-34 GeV at magnetar atmosphere. From these estimates one notices that they coincide with the ones obtained by A. Kostelecky et al., the difference being basically in the method. The ones here were obtained from magnetogenesis data while theirs were obtained from the Earth laboratory data from polarised electrons. Besides here one used the torsion derivatives while A. Kostelecky et al. uses the constant axial torsion tensor. Another fundamental distinction is that we use bosonic sector of the Lagrangian while they use mainly fermionic sector coupling with torsion. © 2011 Elsevier B.V.

Upadhyay S.,State University of Rio de Janeiro | Das D.,University of Kentucky
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014

We analyze the quantum ABJM theory on N=1 superspace in different gauges. We study the Batalin-Vilkovisky (BV) formulation for this model. By developing field/antifield dependent BRST transformation we establish connection between the two different solutions of the quantum master equation within the BV formulation. © 2014 The Authors.

Faizal M.,University of Waterloo | Upadhyay S.,State University of Rio de Janeiro
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014

In this paper, we will analyze the ghost condensation in the ABJM theory. We will perform our analysis in N=1 superspace. We show that in the Delbourgo-Jarvis-Baulieu-Thierry-Mieg gauge the spontaneous breaking of BRST symmetry can occur in the ABJM theory. This spontaneous breaking of BRST symmetry is caused by ghost-anti-ghost condensation. We will also show that in the ABJM theory, the ghost-anti-ghost condensates remain present in the modified abelian gauge. Thus, the spontaneous breaking of BRST symmetry in ABJM theory can even occur in the modified abelian gauge. © 2014 The Authors. Published by Elsevier B.V.

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