1,112 research outputs found
Calagem e adubação para a cultura da mamona no Sul do Brasil.
bitstream/item/31110/1/comunicado-150.pd
Neutron spectrometer for fast nuclear reactors
In this paper we describe the development and first tests of a neutron
spectrometer designed for high flux environments, such as the ones found in
fast nuclear reactors. The spectrometer is based on the conversion of neutrons
impinging on Li into and whose total energy comprises the
initial neutron energy and the reaction -value. The LiF layer is
sandwiched between two CVD diamond detectors, which measure the two reaction
products in coincidence. The spectrometer was calibrated at two neutron
energies in well known thermal and 3 MeV neutron fluxes. The measured neutron
detection efficiency varies from 4.2 to 3.5 for
thermal and 3 MeV neutrons, respectively. These values are in agreement with
Geant4 simulations and close to simple estimates based on the knowledge of the
Li(n,) cross section. The energy resolution of the spectrometer
was found to be better than 100 keV when using 5 m cables between the detector
and the preamplifiers.Comment: submitted to NI
Equation of motion for dislocations with inertial effects
An approximate equation of motion is proposed for screw and edge
dislocations, which accounts for retardation and for relativistic effects in
the subsonic range. Good quantitative agreement is found, in accelerated or in
decelerated regimes, with numerical results of a more fundamental nature.Comment: 6 pages, 4 figures, LaTe
A New Window on Child Prefrontal Functions: Inhibition of a Non-Strategic Alternation-Pointing Scheme
Monitoramento de um Argissolo Vermelho sob produção de eucalipto de treze e vinte anos.
bitstream/item/30417/1/boletim-71.pd
Distribuição espacial do conteúdo de carbono orgânico total no solo em um agroecossistema de terras baixas no sul do brasil.
Estudo da variabilidade espacial dos atributos químicos e físicos do solo em um agroecossistema de arroz irrigado para suporte à Agricultura de Precisão.
Diagnóstico preliminar de solos existentes na microbacia hidrográfica São Domingos, região da encosta do sudeste do RS.
bitstream/item/30585/1/boletim-115.pd
Variabilidade espacial dos atributos químicos do solo em um agroecossistema de Terras Baixas.
Caracterização físico-química da água de xisto visando seu uso como insumo para a agricultura.
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