Noncommutative associative superproduct for general supersymplectic forms

We define a noncommutative and nonanticommutative associative product for general supersymplectic forms, allowing the explicit treatment of non(anti)commutative field theories from general nonconstant string backgrounds like a graviphoton field. We propose a generalization of deformation quantization a la Fedosov to superspace, which considers noncommutativity in the tangent bundle instead of base space, by defining the Weyl super product of elements of Weyl super algebra bundles. Super Poincare symmetry is not broken and chirality seems not to be compromised in our formulation. We show that, for a particular case, the projection of the Weyl super product to the base space gives rise the Moyal product for non(anti)commutative theories.Comment: 22 pages, revtex4. References added. Comments added. Includes additional theorem proof

N=2 Super-Born-Infeld from Partially Broken N=3 Supersymmetry in d=4

We employ the non-linear realization techniques to relate the N=1 chiral, and the N=2 vector multiplets to the Goldstone spin 1/2 superfield arising from partial supersymmetry breaking of N=2 and N=3 respectively. In both cases, we obtain a family of non-linear transformation laws realizing an extra supersymmetry. In the N=2 case, we find an invariant action which is the low energy limit of the supersymmetric Born-Infeld theory expected to describe a D3-brane in six dimensions.Comment: 15 pages, no figures, RevTeX4, new comments and references added, some equations corrected, discussion at end of sec. 3 change

Non-singlet Q-deformed N=(1,0) and N=(1,1/2) U(1) actions

In this paper we construct N=(1,0) and N=(1,1/2) non-singlet Q-deformed supersymmetric U(1) actions in components. We obtain an exact expression for the enhanced supersymmetry action by turning off particular degrees of freedom of the deformation tensor. We analyze the behavior of the action upon restoring weekly some of the deformation parameters, obtaining a non trivial interaction term between a scalar and the gauge field, breaking the supersymmetry down to N=(1,0). Additionally, we present the corresponding set of unbroken supersymmetry transformations. We work in harmonic superspace in four Euclidean dimensions.Comment: 14 pages, typos corrected, equation (2.8) replaced by a more illustrative one, version to appear in PL

Procedimentos para viagens a serviço.

Este documento busca orientar, de forma simplificada, os empregados da Embrapa Uva e Vinho sobre os procedimentos obrigatórios em caso de viagem a serviço.bitstream/item/123759/1/FD00117.pd

Fracturas de cadera y diáfisis femoral ipsilaterales

Se aportan 10 casos de fracturas de cadera y diáfisis femoral ipsilaterales tratados quirúrgicamente de forma diferida con un tiempo medio de demora de 12 días (rango: 3 a 22 días). Nueve fracturas diafisarias fueron tratadas con placa AO de fémur, y una, donde la fractura de cadera asociada pasó inicialmente inadvertida, mediante un clavo de Küntscher. Las fracturas de cadera se fijaron con tornillos de esponjosa (8 casos) o clavo-placa de Richards (2 casos). En todos los pacientes se inició un programa de rehabilitación precoz. El seguimiento medio ha sido de 31 meses (rango: 12 a 84 meses). Todas las fracturas consolidaron. Las complicaciones fueron un caso de acortamiento femoral y otro de artrosis coxofemoral post-traumá- tica. En nuestra experiencia, la fijación de la fractura diafisaria con placa AO, combinada con tornillos de esponjosa o clavo-placa de Richards para la síntesis de la fractura de cadera, proporciona resultados satisfactoriosWe review 10 cases of ipsilateral hip and femoral shaft fractures. Operative treatment was performed in all cases, with an average delay of 12 days (range: 3 to 22 days). Nine femoral shaft fractures were stabilizated with an AO plate, and one, where the associated hip fracture was initially missed, with a Küntscher rod. Hip fractures were fixed with cancellous screws (8 cases) or Richards compression screw (2 cases). An early rehabilitation program was carried out in all patients. The average follow-up was 31 months (range: 12 to 84 months). All fractures healed. Complications were a case of femoral shortening an a case of post-traumatic hip osteoarthritis. In our study, the combination of AO plate for the shaft fracture with cancellous screws or Richards compression screw for the hip fracture provides good results

Luxación tibio astragalina posteromedial sin fractura de maleolos: a propósito de un caso

Se describe un caso de luxación tibioastragalina posteromedial abierta sin fractura asociada de maleolos, en un paciente de 28 años. A los dos años del desbridamiento quirúrgico, reducción manual y reparación capsuloligamentosa, el paciente estaba libre de dolor y presentaba una función semejante a la del tobillo contralateral. Se revisa la literatura sobre el tema y se discuten los factores etiopatológicos, complicaciones y principios de tratamiento

Artritis séptica de rodilla por Streptococcus agalactiae: presentación de un caso y revisión de la literatura

Se describe un caso de artritis séptica de rodilla en un paciente diabético de 69 años. En el momento de la presentación se hallaba sometido a curas locales de una úlcera crónica en el mismo miembro y a antibioterapia oral inespecífica por supuesta infección urinaria. En el cultivo del líquido sinovial se identificó un Streptococcus agalactiae (Estreptococo del grupo B). La infección no remitió con antibioterapia intravenosa electiva e irrigación-aspiración articular repetidas, requiriendo desbridamiento quirúrgico y sinovectomía. A pesar de instaurarse un programa de rehabilitación intensiva la rodilla evolucionó a la rigidez. Se revisa la literatura al respecto, destacando la asociación de artritis por estreptococos del grupo B con pacientes diabéticos portadores de úlceras cutáneas crónicas, así como la potencial gravedad de estas infecciones.This report describes a case of knee septic arthritis in a 69-year-old diabetic patient. At the time of admission he was receiving local treatment for a chronic skin ulcer in the same extremity and inespecific oral antibiotherapy because of an urinary tract infection. Synovial fluid cultures showed a Streptococcus agalactiae (group B streptococcus). The infection had no response to specific parenteral antibiotherapy and repeated joint irrigations-aspirations, and therefore surgical desbridement and synovectomy was required. Despite of an intensive rehabilitation program, the affected knee developed ankylosis. In a review of literature, it is remarkable the association between group B streptococcal arthritis and chronic skin ulcers in diabetic patients and the potential severity of these infections

Gravitational fields as generalized string models

We show that Einstein's main equations for stationary axisymmetric fields in vacuum are equivalent to the motion equations for bosonic strings moving on a special nonflat background. This new representation is based on the analysis of generalized harmonic maps in which the metric of the target space explicitly depends on the parametrization of the base space. It is shown that this representation is valid for any gravitational field which possesses two commuting Killing vector fields. We introduce the concept of dimensional extension which allows us to consider this type of gravitational fields as strings embedded in D-dimensional nonflat backgrounds, even in the limiting case where the Killing vector fields are hypersurface orthogonal.Comment: latex, 25 page