Strongly coupled matter near phase transition

In the Hartree approximation of Cornwall-Jackiw-Tomboulis (CJT) formalism of the real scalar field theory, we show that for the strongly coupled scalar system near phase transition, the shear viscosity over entropy density is small, however, the bulk viscosity over entropy density is large. The large bulk viscosity is related to the highly nonconformal equation of state. It is found that the square of the sound velocity near phase transition is much smaller than the conformal value 1/3, and the trace anomaly at phase transition deviates far away from 0. These results agree well with the lattice results of the complex QCD system near phase transition.Comment: 6 pages, 2 figures, 1 table, contributed to the International Conference on Strangeness in Quark Matter 2008, Beijing, China, 6-10 October 200

Análise do comércio do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763), no município de Macapá-AP.

O caranguejo-uçá é um importante recurso pesqueiro que se encontra sobre explorado em todo litoral brasileiro. Desempenha papel tanto econômico, quando fonte de renda para os atores da cadeia produtiva, quanto ecológico, na manutenção dos ecossistemas de mangues. No Amapá têm ocorrência em três municípios (Amapá, Calçoene e Oiapoque), e é comercializado principalmente no município de Macapá, tornando de fundamental importância a caracterização desta atividade, uma vez que este é o primeiro estudo sobre o comércio da espécie no Estado. Durante nove meses (outubro/2008 a junho/2009) foram realizadas visitas mensais (n=32) às feiras do Mercado Central do Igarapé das Mulheres para aplicação de entrevistas com os vendedores de caranguejo, e para o levantamento de dados biométricos de largura e comprimento do tefalotórax (CC e LC) dos animais comercializados. Aleatoriamente, foram adquiridos 854 exemplares machos que apresentaram LC média de 85,4 mm e CC médio de 65 mm. Verificou-se que os caranguejos comercializados são capturados principalmente nos municípios amapaenses. Os resultados obtidos indicam que há alterações de preço durante o ano, e que essa oscilação está relacionada à oferta com que este recurso é disponibilizado. Os dados obtidos mostram ainda, que houve comercialização durante o período de defeso na Feira do Mercado Central e que os animais comercializados procedem em maior parte de municípios paraenses. De modo geral, concluímos que a Portaria Estadual está sendo respeitada em relação ao tamanho mínimo de captura e a não comercialização de fêmeas, no entanto, os caranguejos continuam a serem comercializados no período legalmente proibido

Noether's Symmetry Theorem for Variational and Optimal Control Problems with Time Delay

We extend the DuBois-Reymond necessary optimality condition and Noether's symmetry theorem to the time delay variational setting. Both Lagrangian and Hamiltonian versions of Noether's theorem are proved, covering problems of the calculus of variations and optimal control with delays.Comment: This is a preprint of a paper whose final and definite form will appear in the international journal Numerical Algebra, Control and Optimization (NACO). Paper accepted for publication 15-March-201

Coder and Decoder of Block mBnB Principally the 1B2B or Manchester

This work presents the coder and decoder of block mBnB of the type 1B2B or Manchester. In the coder 1B2B each block/word of 1 input bit is coded in the block / word of 2 output bits. In the decoder 1B2B happen the inverse, each block of 2 input bits is newly converted in the original block of 1 output bit. The coder injects in the transmission line a number of 1’s exactly equal to the number of 0’s, what guarantees a DC constant component and maximizes the transitions number.  The objective is  to implement the pair coder and decoder 1B2B so that it improves the transmission quality and increases the information security. Keywords: Block codes, Digital systems, Transmission line

Perturbed Self-Similar Massless Scalar Field in the Spacetimes with Circular Symmetry in 2+1 Gravity

We present in this work the study of the linear perturbations of the 2+1-dimensional circularly symmetric solution, obtained in a previous work, with kinematic self-similarity of the second kind. We have obtained an exact solution for the perturbation equations and the possible perturbation modes. We have shown that the background solution is a stable solution.Comment: no figure

Variação genotípica na resposta antioxidativa de cultivares de Feijão-caupi expostos ao estresse osmótico.

The cowpea [Vigna unguiculata (L.) Walp.], also known as cowpea, is of fundamental socioeconomic importance to the northeast of Brazil, and has become one of the main sources of protein in the diet of the rural population. However, in this region, it has become necessary to identify genotypes that are better adapted to drought..

Parton picture for the strongly coupled SYM plasma

Deep inelastic scattering off the strongly coupled N=4 supersymmetric Yang-Mills plasma at finite temperature can be computed within the AdS/CFT correspondence, with results which are suggestive of a parton picture for the plasma. Via successive branchings, essentially all partons cascade down to very small values of the longitudinal momentum fraction x and to transverse momenta smaller than the saturation momentum Q_s\sim T/x. This scale Q_s controls the plasma interactions with a hard probe, in particular, the jet energy loss and its transverse momentum broadening.Comment: 4 pages, Talk given at Quark Matter 2008: 20th International Conference on Ultra-Relativistic Nucleus Nucleus Collisions (QM 2008), Jaipur, India, 4-10 Feb 200

Inventário de mamíferos de médio e grande porte no município de São Pedro do Ivaí, estado do Paraná.

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