Anisotropic Lifshitz Point at O(ϵL2)O(\epsilon_L^2)

We present the critical exponents $\nu_{L2}$, $\eta_{L2}$ and $\gamma_{L}$ for an $m$-axial Lifshitz point at second order in an $\epsilon_{L}$ expansion. We introduced a constraint involving the loop momenta along the $m$-dimensional subspace in order to perform two- and three-loop integrals. The results are valid in the range $0 \leq m < d$. The case $m=0$ corresponds to the usual Ising-like critical behavior.Comment: 10 pages, Revte

Desempenho agronômico de cultivares de abóbora em condições de terra firme e de período chuvoso em Manaus-AM

Objetivou-se estudar o desempenho agronômico de diferentes cultivares de abóbora em condições de terra firme durante o período chuvoso no município de Manaus-AM.Edição dos Resumos do 52º Congresso Brasileiro de Olericultura, Salvador, jul. 2012

The partnership as a factor of sustainable growth for the companies in the information technology sector in Brazil

In the last decade, some companies in the field of information technology had been significant growth while others have not reached the same results. We also observed that some of these companies began to adopt strategies with a focus on partnership. There are a number of questions about the partnership as a factor of sustainable growth for the companies in the information technology Sector. This article presents some concepts and interpretations based on literature review, expert opinion, field research via questionnaires and the own professional experience.info:eu-repo/semantics/publishedVersio

Business partnership at the information technology sector in Brazil

This article is made up of a case of application of Game Theory to business partners. It analyzes the partnership as an element that has consequences on the sustainable growth process of companies in the Information Technology (IT) industry in Brazil and presents the application of a model adopted by business partners on this sector. Research shows that partnership between IT companies with complementary profiles has beneficial effects and contributes to the sustainable growth of the companies in the IT sector, and consequently to this technology sector in Brazil.info:eu-repo/semantics/publishedVersio

Yang-Lee Zeros of the Two- and Three-State Potts Model Defined on ϕ3\phi^3 Feynman Diagrams

We present both analytic and numerical results on the position of the partition function zeros on the complex magnetic field plane of the $q=2$ (Ising) and $q=3$ states Potts model defined on $\phi^3$ Feynman diagrams (thin random graphs). Our analytic results are based on the ideas of destructive interference of coexisting phases and low temperature expansions. For the case of the Ising model an argument based on a symmetry of the saddle point equations leads us to a nonperturbative proof that the Yang-Lee zeros are located on the unit circle, although no circle theorem is known in this case of random graphs. For the $q=3$ states Potts model our perturbative results indicate that the Yang-Lee zeros lie outside the unit circle. Both analytic results are confirmed by finite lattice numerical calculations.Comment: 16 pages, 2 figures. Third version: the title was slightly changed. To be published in Physical Review

Ocorrência do fungo Scytalidium lignicola agente causal da podridão negra do caule e raiz da mandioca no Estado do Pará.

Resumo 487

Identificação e controle da murcha bacteriana em maracujazeiro amarelo no Estado do Pará.

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