Slavnov-Taylor identities for noncommutative QED4_4

In this work we present an analysis of the one-loop Slavnov-Taylor identities in noncommutative QED$_4$. The vectorial fermion-photon and the triple photon vertex functions were studied, with the conclusion that no anomalies arise.Comment: 24 pages, revtex4, v2: typos correcte

Heterogeneous microbial community associated with Bursaphelenchus xylophilus

Pine wilt disease (PWD) is a complex disease integrating three major factors: the causal agent, the pinewood nematode Bursaphelenchus xylophilus; the insect-vector Monochamus spp.; and the host pine tree, Pinus sp. Since the early 80’s, the notion that another pathogenic agent involved, namely bacteria, may play a role in PWD has been gaining traction, however the role of bacteria in PWD is still unknown. The present work suggests the intriguing possibility that some B. xylophilus-associated bacteria may play a significant role in the development of this disease. This is inferred as a consequence of: (i) the phenotypic characterization, of a collection of 35 isolates of B. xylophilus-associated bacteria, in different tests broadly used to test plant pathogenic and plant growth promoting bacteria, and (ii) greenhouse experiments that infer pathogenicity of these bacteria in in maritime pine, Pinus pinaster. The results illustrate the presence of a heterogeneous microbial community associated with B. xylophilus and the traits exhibited by at least some of these bacteria appear to be related to PWD symptoms. The inoculation of four specific B. xylophilus-associated bacteria in P. pinaster seedlings resulted in the development of some PWD symptoms suggesting that these bacteria likely play an active role with B. xylophilus in PWD

Uso de técnicas do planejamento estratégico empresarial nos planos diretores agrícolas: uma solução possível?

Instrumentos motivacionais de grupos de interesse na formatação das políticas públicas e técnicas (Planos Estratégicos, diversas formas de crédito, propriedade privada, Usucapião individuais e coletivos, ferramentas Institucionais de planejamento territorial, etc.) e legais (Planos Diretores, Zoneamentos Urbanos e Peri ? Urbanos, Estatutos das Cidades, Uso dos Solos Urbanos, etc.), têm como condição básica precípua: à organização, participação e fortalecimento das capacidades de gestão dos agentes dos poderes locais, em uma escala urbana, rural ou simplesmente territorial, formando o alicerce, tanto construção do plano de desenvolvimento endógeno local quanto regional, quer seja no âmbito municipal, estadual ou federal, formando assim, o capital social adequado ao cumprimento das ações necessárias ao incremento de atividades instigadoras dos órgãos responsáveis pelo planejamento urbanos e rurais, a cumprirem suas missões na implementação, das já existentes e de novas políticas públicas, voltadas para benefício dos cidadãos. Esse trabalho tem como objeto central, mostrar um novo modo de aproximar os interesses locais, as políticas públicas e seus beneficiários, via a adoção de práticas desenhadas de forma estratégica, para aplicação tanto urbana quanto rural das ferramentas de planejamento existentes.bitstream/item/85408/1/JoaoDeus3.pd

The Slavnov-Taylor Identities for the 2+1 Dimensional Noncommutative CPN−1^{N-1} Model

In the context of the $1/N$ expansion, the validity of the Slavnov-Taylor identity relating three and two point functions for the $2+1$ dimensional noncommutative CP$^{N-1}$ model is investigated, up to subleading $1/N$ order, in the Landau gauge.Comment: 10 pages, revtex

Surface and Bulk Structural Properties of Single Crystalline Sr3Ru2O7

We report temperature and thermal-cycling dependence of surface and bulk structures of double-layered perovskite Sr3Ru2O7 single crystals. The surface and bulk structures were investigated using low-energy electron diffraction (LEED) and single-crystal X-ray diffraction (XRD) techniques, respectively. Single-crystal XRD data is in good agreement with previous reports for the bulk structure with RuO6 octahedral rotation, which increases with decreasing temperature (~ 6.7(6)degrees at 300 K and ~ 8.1(2) degrees at 90 K). LEED results reveal that the octahedra at the surface are much more distorted with a higher rotation angle (~ 12 degrees between 300 and 80 K) and a slight tilt ((4.5\pm2.5) degrees at 300 K and (2.5\pm1.7) degrees at 80 K). While XRD data confirms temperature dependence of the unit cell height/width ratio (i.e. lattice parameter c divided by the average of parameters a and b) found in a prior neutron powder diffraction investigation, both bulk and surface structures display little change with thermal cycles between 300 and 80 K.Comment: 25 pages, 5 figures, 5 tables, to appear in Physical Review

Produtividade e percentuais de folhas de gramineas forrageiras nos periodos seco e chuvoso.

Neste trabalho sao apresentados os resultados parciais da avaliacao de quatro genotipos de P. maximum (BRA 007102, Mombaca, Tanzania e Tobiata), B. decumbens cv. Basilisk e B. brizantha cv. Marandu, testados nos municipios de Teresina e Jerumenha, no Piaui, e Bacabal no Maranhao.bitstream/item/97621/1/PAND910001.pd