We investigate the radiation emitted from a scalar source in circular orbit around a Reissner- Nordstr¨om black hole. Particle and energy emission rates are analytically calculated in the low- and high-frequency regimes ...

Squeezed correlations of particle antiparticle pairs, also called Back-to- Back Correlations, are predicted to appear if the hadron masses are modified in the hot and dense hadronic medium formed in high energy nucleus-nucleus ...

Squeezed correlations of particle antiparticle pairs were predicted to exist if the hadron masses were modified in the hot and dense medium formed in high energy heavy ion collisions. Although well-established theoretically,they ...

A série de exposições relativas necessárias para produzir um intervalo útil de densidades ópticas no filme pode ser obtida pelos métodos sensitométricos de tempo escalonado ou intensidade escalonada. Um sensitômetro de ...

Neste artigo explora-se a aplicação da simulação computacional na avaliação de incertezas de medição. Apresenta brevemente o método clássico ou de propagação de incertezas, sua formulação e suas limitações. A seguir, ...

The paper presents the main conclusions of an exploratory study of the ability of Sixth form students in England to use some different approaches to computational modelling. The research involves a questionnaire survey of ...

Este artigo é um estudo teórico e experimental da dinâmica de uma lâmina flexível acoplada a um atuador do tipo Harmonic Drive. Como resultado principal, é apresentada uma técnica que permite, a partir dos dados fornecidos ...

Both hard and soft QCD dynamics are important in charmonium production, as presented here through a next-to-leading order QCD matrix element calculation combined with the color evaporation model. The observed xF and p⊥ ...

We describe a Moser-type iteration procedure to derive decay esti- mates for solutions u(_; t) of very general advection-di_usion equations in n-dimensional space, assuming u(_; 0) = u0 2 Lp(Rn), 1 _ p < 1. A number of ...

Squeezed correlations of hadron-antihadron pairs are predicted to appear if their masses are modified in the hot and dense medium formed in high energy heavy ion collisions. If discovered experimentally, they would be an ...

A novel type of correlation involving particle-antiparticle pairs was found out in the 1990’s. Currently known as squeezed or Back-to-Back Correlations (BBC), they should be present if the hadronic masses are modified in ...

This work is based on a Brazilian project that aims to promote the use of a semi-quantitative tool with students (11 - 18 years old) in topics about local environmental problems. The paper presents the VISQ program, a ...

Elliptic flow at RHIC is computed event by event with NeXSPheRIO. Reasonable agreement with experimental data on v2(h) and v2(pt) is obtained. Various effects are studied as well: equation of state (with or without critical ...

We build a complete supersymmetric version of a 3-3-1 gauge model using the superfield formalism. We point out that a discrete symmetry, similar to R symmetry in the minimal supersymmetric standard model, is possible to ...

We consider the supersymmetric extension of the 3-3-1 model with right-handed neutrinos.We study the mass spectra in the scalar and pseudoscalar sectors, and for a given set of the input parameters, we find that the ...

We build the complete supersymmetric version of a 3-4-1 gauge model using the super-eld formalism. We point out that a discrete symmetry, similar to the R-symmetry in the minimal supersymmetric standard model, is possible ...

Esse artigo analisa o uso da robótica educacional e sua contribuição para o conhecimento da ciência, identificando as aprendizagens possíveis em sala de aula. Na pesquisa utiliza-se uma adaptação do método clinico piagetiano ...

Este artigo tem por objetivo apresentar uma simulação da estimativa dos parâmetros das habilidades de indivíduos sujeitos a um teste, utilizando o método da Teoria da Resposta ao Item (TRI). Para isso, foi feito uma análise ...

The anapole form factor of the nucleon is calculated in chiral perturbation theory in leading order. To this order, the form factor originates from the pion cloud, and is proportional to the non-derivative parity-violating ...

The Bethe ansatz in its several formulations is the common tool for the exact solution of one dimensional quantum Hamiltonians. This ansatz asserts that the several eigenfunctions of the Hamiltonians are given in terms of ...