14 research outputs found

    El clima urbano de ciudades subtropicales costeras atlánticas: el caso de la conurbación de Florianópolis

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    New investigations on the 32S(3He,d)33Cl reaction at 9.6 MeV bombarding energy

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    The 32S(3He,d)33Cl one-proton transfer reaction is a powerful tool to investigate the spectroscopy of low-lying states in the proton-rich 33Cl nucleus. However, the extraction of firm differential cross-section data at various angles to benchmark and constrain theoretical models is made challenging by the presence of competitive reactions on target contaminants. In this paper we report on arecent measurement using a new generation hodoscope of silicon detectors, capable to detect and identify emitted deuterons down to energies of the order of 2 MeV. The high angular segmentation of our hodoscope combined with a suitable target to control possible contaminants, allowed to unambiguously disentangle the contribution of various states in 33Cl, in particular the 2.352 MeV state lying just few tens of keV above the proton separation energy

    NOTAS E RESENHAS

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    CARACTERIZAÇÃO DOS AGRICULTORES ORGÂNICOS FLUMINENSES E ANÁLISE DE SUAS EXPERIÊNCIAS - Renato Linhares de Assis, Dryden Castro de Arezzo, Dejair Lopos de Almeida, Helvécio De-Polli RIO CLARO E AS OFICINAS DA COMPANHIA PAULISTA DE ESTRADAS DE FERRO: RACIONALIZAÇÃO E TRABALHO 1930-1940 - Liliana Bueno dos Reis Garcia ELABORAÇÃO DE CARTA DE ZONEAMENTO DOS ESPAÇOS LIVRES SOBRE PRESSÃO URBANA - Pedro de Souza Quevedo Neto, Magda A. Lombardo GEOGRAFIA E ESPÍRITO HUMANO - Lucy Marion C. Philadelphio Machado O BOTO NO IMAGINÁRIO AMAZONENSE: TRANSFORMAÇÕES E DESENCANTOS - Lucy Marion C. Philadelphio GUIA DE UM NATURALISTA PARA O ÁRTICO - Adler Guilherme Viadanna MORFOLOGIA, PROCESSOS E MODELOS EM GEOMORFOLOGIA - Antonio Christofoletti LITERATURA ENVOLVENDO OBRAS SOBRE ANÁLISE ESPACIAL, A RESPEITO DO ENSINO E APLICABILIDADE DOS SISTEMAS DE INFORMAÇÕES GEOGRÁFICA, DA MODELAGEM E FRACTAIS - Antonio Christofoletti A AMPLA TEMÁTICA DO DESENVOLVIMENTO SUSTENTÁVEL - Antonio Christofolett

    Study of the 32S(3He,d)33Cl one-proton transfer reaction with a new generation hodoscope

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    Abstract The 32S(3He,d)33Cl one-proton transfer reaction is a powerful tool to investigate the spectroscopy of low-lying states in the proton-rich 33Cl nucleus. However, the extraction of firm differential cross-section data at various angles, against which benchmarking theoretical models to correctly constrain the spectroscopy of 33Cl, is made challenging by the presence of competitive reaction products contaminating the detected energy spectra. We have recently measured the 32S(3He,d)33Cl reaction at 9.8 MeV incident energy by using a new generation hodoscope of silicon detectors, capable to detect and identify emitted deuterons down to energies of the order of 2 MeV. The high angular segmentation of our hodoscope allowed to unambiguously disentangle the contribution of one-proton transfer reactions in the ground state of 33Cl and in its 0.810 MeV, 2.352 MeV, 2.685 MeV, 2.846 MeV excited states from contaminant deuteron-emitting reactions. These data will be crucial to help to constrain Jπ and spectroscopic factor C 2 Sp values of low-lying 33Cl states, still ambiguous in the literature. The present status of the analysis is discussed in the paper

    El clima urbano de ciudades subtropicales costeras atlánticas: el caso de la conurbación de Florianópolis

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    This work demonstrates the simultaneous influence of geoecological and urban factors on the variation of temperature and other climatic elements of the Florianópolis conurbation. Data was obtained in various places, following synoptic time series, under different weather types, using a digital thermo hygrometer and visual information. The temperature gradients maps, compared with airport station, demonstrated a significant thermal conservation capacity in places occupied by buildings and dense and intense traffic. Urban heat archipelagos instead of a continuing urban heat island were recorded as a consequence of urban poly nucleus and site morphologic compartments. The most intense heat islands occurred in the central part of the region, when the polar air masses dominate or are under pre-frontal transition. These results are relevant for the evaluation of environmental quality, and should support urban planning diagnostics.Este estudio del clima de la conurbación de Florianópolis demuestra la influencia simultánea de los factores geoecológicos y de la urbanización sobre la variación espacio-temporal de la temperatura y otros elementos climáticos. Se levantaron datos meteorológicos en varias localidades, en horarios sinópticos y en diferentes tipos de tiempo, utilizando un termo hidrógrafo digital y observaciones visuales. Los mapas de gradiente de temperatura, referidos a datos de la estación del aeropuerto, demostraron una significativa conservación térmica en los locales ocupados por construcciones verticales, de alta densidad e intenso tráfico. No se observó la formación de una isla de calor continua, sino que un archipiélago, debido tanto al carácter multinuclear de la urbanización como a la compartimentalización morfológica de los sitios. Las islas de calor más intensas se registraron en el sector central de la región, bajo dominio polar y en situaciones de transición y prefrontal. Estos resultados pueden ser importantes para la evaluación de la calidad ambiental, formando parte de los diagnósticos necesarios para el planeamiento urbano

    Riscos ambientais em grandes metrópoles.: O caso de São Paulo, Brasil

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    The metropolis in all its social and environmental complexity provides a favorable scenario for developing consumer and thereby the environmental impacts resulting from these behaviors tend to gain proportions that offer higher risk to future generations.A metrópole em toda sua complexidade social e ambiental oferece um cenário propício para o desenvolvimento de práticas consumistas e, com isso, os impactos ambientais decorrentes destes comportamentos tendem a ganhar proporções que oferecem maiores riscos às gerações futuras
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