1,432 research outputs found
Sensory stability and aromatic differentiation of tropical Brazilian wines.
Our objective was determined stability of sensory parameters and aromatic differentiation of tropical wines from Northeast of Brazil by Quantitative Descriptive Analysis (QDA
Sensory stability and aromatic differentiation of tropical Brazilian wines.
Our objective was determined stability of sensory parameters and aromatic differentiation of tropical wines from Northeast of Brazil by Quantitative Descriptive Analysis (QDA
Non-Markovian Dynamics of Quantum Discord
We evaluate the quantum discord dynamics of two qubits in independent and
common non-Markovian environments. We compare the dynamics of entanglement with
that of quantum discord. For independent reservoirs the quantum discord
vanishes only at discrete instants whereas the entanglement can disappear
during a finite time interval. For a common reservoir, quantum discord and
entanglement can behave very differently with sudden birth of the former but
not of the latter. Furthermore, in this case the quantum discord dynamics
presents sudden changes in the derivative of its time evolution which is
evidenced by the presence of kinks in its behavior at discrete instants of
time.Comment: 6 pages, 4 figure
Evaluation of ripening Vitis vinifera grown in Northeastern Brazil.
This study aimed to determine physical characteristics and chemical composition of grapes cvs. Syrah and Tempranillo, during maturation
Fano resonances in plasmonic core-shell particles and the Purcell effect
Despite a long history, light scattering by particles with size comparable
with the light wavelength still unveils surprising optical phenomena, and many
of them are related to the Fano effect. Originally described in the context of
atomic physics, the Fano resonance in light scattering arises from the
interference between a narrow subradiant mode and a spectrally broad radiation
line. Here, we present an overview of Fano resonances in coated spherical
scatterers within the framework of the Lorenz-Mie theory. We briefly introduce
the concept of conventional and unconventional Fano resonances in light
scattering. These resonances are associated with the interference between
electromagnetic modes excited in the particle with different or the same
multipole moment, respectively. In addition, we investigate the modification of
the spontaneous-emission rate of an optical emitter at the presence of a
plasmonic nanoshell. This modification of decay rate due to electromagnetic
environment is referred to as the Purcell effect. We analytically show that the
Purcell factor related to a dipole emitter oriented orthogonal or tangential to
the spherical surface can exhibit Fano or Lorentzian line shapes in the near
field, respectively.Comment: 28 pages, 10 figures; invited book chapter to appear in "Fano
Resonances in Optics and Microwaves: Physics and Application", Springer
Series in Optical Sciences (2018), edited by E. O. Kamenetskii, A. Sadreev,
and A. Miroshnichenk
Exact dynamics of single qubit gate fidelities under the measurement-based quantum computation scheme
Measurement-based quantum computation is an efficient model to perform
universal computation. Nevertheless, theoretical questions have been raised,
mainly with respect to realistic noise conditions. In order to shed some light
on this issue, we evaluate the exact dynamics of some single qubit gate
fidelities using the measurement-based quantum computation scheme when the
qubits which are used as resource interact with a common dephasing environment.
We report a necessary condition for the fidelity dynamics of a general pure
N-qubit state, interacting with this type of error channel, to present an
oscillatory behavior and we show that for the initial canonical cluster state
the fidelity oscillates as a function of time. This state fidelity oscillatory
behavior brings significant variations to the values of the computational
results of a generic gate acting on that state depending on the instants we
choose to apply our set of projective measurements. As we shall see,
considering some specific gates that are frequently found in the literature,
neither fast application of the set of projective measurements necessarily
implies high gate fidelity, nor slow application thereof necessarily implies
low gate fidelity. Our condition for the occurrence of the fidelity oscillatory
behavior shows that the oscillation presented by the cluster state is due
exclusively to its initial geometry. Other states that can be used as resources
for measurement-based quantum computation can present the same initial
geometrical condition. Therefore, it is very important for the present scheme
to know when the fidelity of a particular resource state will oscillate in time
and, if this is the case, what are the best times to perform the measurements.Comment: 9 pages, 5 figures. Extra examples adde
The AMS-02 RICH Imager Prototype - In-Beam Tests with 20 GeV/c per Nucleon Ions -
A prototype of the AMS Cherenkov imager (RICH) has been tested at CERN by
means of a low intensity 20 GeV/c per nucleon ion beam obtained by
fragmentation of a primary beam of Pb ions. Data have been collected with a
single beam setting, over the range of nuclear charges 2<Z<~45 in various beam
conditions and using different radiators. The charge Z and velocity beta
resolutions have been measured.Comment: 4 pages, contribution to the ICRC 200
Chemistry composition during red grapes maturation for wines elaboration in Northeast Brazil.
This study aimed to determine physical characteristics and chemical composition of grapes cvs. Syrah and Tempranillo, during maturatio
Efeito bioeconômico de níveis de concentrado no confinamento de novilhos.
O confinamento e uma atividade que possibilita o abate de animais jovens e bem acabados, proporcionando, em geral, carcaças e carne de melhor qualidade. Considerando-se que, no Brasil, ainda não se pratica a adequada remuneração pela qualidade das carcaças e da carne e o concentrado e um dos itens que mais onera os custos operacionais de um confinamento a determinação de um nível ótimo de concentrado, que proporcione uma carcaça com um acabamento mínimo, e uma maneira do produtor conseguir maior produtividade nesta atividade. Foi desenvolvido, no Centro Nacional de Pesquisa de Gado de Corte (CNPGC) da Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), um experimento com animais da raça Nelore e outro com animais F1 Pardo Suíço-Nelore, visando a determinar-se o ponto ótimo de adição de concentrado, levando-se em conta o desempenho animal, a qualidade das carcaças e o retorno econômico. No experimento com mestiços, observou-se que a conversão alimentar e ganho de peso diário melhoraram com a adição de concentrado, no qual o maior ganho seria ofertando-se concentrado na proporção de 1,65% do peso vivo dos animais. O melhor retorno econômico, entretanto, seria obtido com a oferta de 1% do peso vivo. No experimento com a raça Nelore, o melhor desempenho seria com adição de concentrado na razão de 1% do peso vivo dos animais, enquanto que o retorno financeiro mostrou-se indiferente ao nível de utilização de concentrado. O custo final de todos os tratamentos foi semelhante, pois, quando houve maior custo diário, o tempo de confinamento foi menor, enquanto que quando o gasto diário foi menor o tempo de confinamento foi maior.bitstream/item/104567/1/Efeito-bioeconomico-de-niveis.pd
Chemistry composition during red grapes maturation for wines elaboration in Northeast Brazil.
This study aimed to determine physical characteristics and chemical composition of grapes cvs. Syrah and Tempranillo, during maturatio
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