On the nature of some SGRs and AXPs as rotation-powered neutron stars

We investigate the possibility that some SGRs/AXPs could be canonical rotation-powered pulsars using realistic NS structure parameters instead of fiducial values. We show that realistic NS parameters lowers the estimated value of the magnetic field and radiation efficiency, $L_X/\dot{E}_{\rm rot}$, with respect to estimates based on fiducial NS parameters. We show that nine SGRs/AXPs can be described as canonical pulsars driven by the NS rotational energy, for $L_X$ computed in the soft (2--10~keV) X-ray band. We compute the range of NS masses for which $L_X/\dot{E}_{\rm rot}<1$. We discuss the observed hard X-ray emission in three sources of the group of nine potentially rotation-powered NSs. This additional hard X-ray component dominates over the soft one leading to $L_X/\dot{E}_{\rm rot}>1$ in two of them. We show that 9 SGRs/AXPs can be rotation-powered NSs if we analyze their X-ray luminosity in the soft 2--10~keV band. Interestingly, four of them show radio emission and six have been associated with supernova remnants (including Swift J1834.9-0846 the first SGR observed with a surrounding wind nebula). These observations give additional support to our results of a natural explanation of these sources in terms of ordinary pulsars. Including the hard X-ray emission observed in three sources of the group of potential rotation-powered NSs, this number of sources with $L_X/\dot{E}_{\rm rot}<1$ becomes seven. It remains open to verification 1) the accuracy of the estimated distances and 2) the possible contribution of the associated supernova remnants to the hard X-ray emission.Comment: 11 pages, 14 figures, to appear in A&

Monitoramento da qualidade física de um argissolo sob plantio direto de milho e de mamona.

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Boas Práticas de fabricação e manejo na colheita e pós-colheita de uvas finas de mesa.

O aspecto visual das frutas geralmente atrai a atenção do consumidor. Coloração característica e frescor são alguns atributos de qualidade que induzem o consumidor à primeira compra, mas que, isoladamente, não garantem as compras futuras. Isso significa que o consumidor deseja, além da aparência atrativa, que a fruta seja saborosa e, mais recentemente, que o seu consumo seja seguro e lhe traga benefícios à saúde através da ingestão de compostos nutracêuticos. O perfil do consumidor moderno está mudando e exigindo uma adequação do setor produtivo quanto ao fornecimento de alimentos livres de contaminantes que possam causar qualquer tipo de prejuízo à sua saúde. Nesse sentido, esta publicação busca apresentar uma síntese dos perigos potenciais associados à colheita e pós-colheita das uvas finas de mesa e, principalmente, das boas práticas de fabricação (BPF), que, quando aplicadas, resultam na eliminação dos riscos potenciais de contaminação do alimento. Ainda, são apresentados os procedimentos que devem ser adotados no manejo das uvas a fim de que seja assegurada a qualidade requerida pelos principais mercados.bitstream/CNPUV-2009-09/10139/1/cir077.pdfDisponível também no formato online

Alevino - um termo equivocado na piscicultura brasileira com conseqüências no setor produtivo.

Neste trabalho foi proposta uma nomenclatura para cada tamanho de peixe vendido em fazendas de reprodução e, também, foi proposta uma mudança no nome normalmente utilizado em sistemas de criação para peixes pequenos de alevino para juvenil

Uso de efluentes da carcinicultura de águas interiores na irrigação de arroz e melão.

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Determinação do grau crítico de umidade em sementes de Cenostigma tocantinum Ducke e Dipteryx odorata Willd.

Este trabalho teve como objetivo avaliar o comportamento das sementes desta espécie quanto a sensibilidade à desidratação

Low-cost multi-spectral camera platform for in-flight near real-time vegetation index computation and delivery.

Agricultural optimization and increased productivity is always a growing concern, due to the increasing population. Crops susceptible to a wide variety of hindering conditions, need to be carefully observed and managed to guarantee maximum production. Many diseases, weather changes, soil variances and other in?uencing factors are only visible after the plant has reached a deplorable state and its neighbors closely trailing behind. Ongoing research is enhancing an observation model that can better prevent such factors, but many still present a variety of limiting factors that are still being studied. Vegetation indices is a long dated studied concept that has proven to be able to show plant response to stress before visible signs are present. To take advantage of this we propose a multi-spectral camera, aimed at mass use, to provide the needed observation with top of the line, reliable results. The built prototype was put through two different tests, both showing it capable of displaying plant health. The ?ne control test showed the camera capable of displaying difference in plant health after only two days of stress. The results were reached with out the use of expensive lenses/?lters, and provide easy to interpret results. All while being able to send data to a nearby portable device