Differential Cross Sections
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Numerical analysis of reinforced concrete asymmetric cross-section beams under oblique bending
Abstract The problem of symmetric cross-section beams under oblique bending is well known to professional designers and academy. In fact, symmetric elements make up most of the cross-sections defined in design. The case of the asymmetric cross-sections is, however, little discussed in literature, but is a particular problem, especially in bridge girder desig
REM, Int. Eng. J.. Publicado em: 2019-06
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2. Análise numérica 3D do túnel auxiliar a jusante da UHE simplício-anta / 3D Numerical analysis of the tunnel downstream of the auxiliary
With the accelerated occupation of the space, the use of tunnels play an important role in engineering, in this sense, the deformations control during it s construction process is very important for the best performance of tunnels. In this sense the numerical analyzes represent a likely economy in the design process. This paper uses a theory of elasticity in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
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3. Interações entre glicina e elétrons de baixa energia: formação de íons metaestáveis e afinidade eletrônica / Interactions between glycine and low energy electrons: formation of metastable ions and electron affinity
In this work we have performed calculations of elastic differential and integral cross-sections for electron-glycine scattering , and performed calculations of electron affinities of gly-(H2O)n clusters. The scattering calculations were done using the Schwinger multichanel method with pseudopotentials (SMCPP) in the static-exchange (SE) and in the static-exc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2010
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4. Espalhamento de Férmions sob Influencia da Violação de Lorentz no Setor Fotônico / Scattering of Fermions under Influence of Violation Lorentz Sector Photonic
The standard model extension is a theoretical framework which includes the possibility of Lorentz symmetry violation in the Standard Model of elementary interactions. In electrodynamics, this possibility is represented by the term, KμFμF, that violates Lorentz symmetry without jeopardizing CPT symmetry, and the term "μvAμ@A, which violate
Publicado em: 2010
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5. Low-energy electron collisions with ethane
We employed the Schwinger multichannel method to compute elastic cross sections for low-energy electron collisions with ethane (C2H6). The calculations were carried out in the static-exchange and static-exchange plus polarization approximations for energies up to 12 eV. Our integral cross section shows good agreement with experimental data and with theoretic
Brazilian Journal of Physics. Publicado em: 2009-03
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6. A Study of Soft Interactions at Ultra High Energies
We present and discuss our recent study of an eikonal two channel model, in which we reproduce the soft total, integrated elastic and diffractive cross sections, and the corresponding forward differential slopes in the ISR-Tevatron energy range. Our study is extended to provide predictions at the LHC and Cosmic Rays energies. These are utilized to assess the
Brazilian Journal of Physics. Publicado em: 2008-09
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7. Estudo da interação de elétrons com moléculas relevantes à atmosfera
In this work, we present Absolute Elastic Differential (SCDE), Integral Elastic (SCIE) and Momentum-Transfer (SCTM) Cross Sections for electron scattering by n-Butane (C4H10), Benzene (C6H6), Methanol (CH3OH), Ethanol (C2H5OH), 1-propanol (C3H7OH) and 2-propanol (C3H7OH). The measurements were performed for incident energies of electron in the range of 200 e
Publicado em: 2008
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8. A numerical study about the determination of parameters in an incompressible and linearly elastic solid / Estudo numérico sobre a determinação de parâmetros em um sólido elástico-linear e incompressível
The theory of classical linear elasticity is used to model of problems in medical physics that are related to the determination of elastic parameters of biological tissues from the measurement in vivo, or, in vitro of either displacements or strains. Based on experimental observations, which indicate that the abnormal biological tissues have different mechan
Publicado em: 2008
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9. Effect of the triiodothyronine (T3) and the thyroid receptor beta selective agonist GC-24 upon rat skeletal muscle trophism: expression of proteasome-dependent genes. / Efeito da triiodotironina (T3) e do agonista TRb seletivo GC-24 sobre o trofismo muscular esquelético de ratos: aspectos envolvendo a proteólise dependente de proteassoma.
Triiodothyronine (T3) is known to play a key role in the function of several tissues/organs via the thyroid hormone receptor isoforms a/pha (TRa) and beta (TRI3). Abnormalities in skeletal muscle function have been associated with increased leveis of T3, which is a major sarcopenia (Ioss of sarcomeres). Although the phenomenon of sarcopenia induced by T3 has
Publicado em: 2008
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10. Electron impact single ionization of the He-isoelectronic sequence
In this work, triply differential cross sections for single electron emission due to electron impact on the He-isoelectronic sequence are calculated by using a Born-C3 model. The influence of the nuclear charge on the angular distributions is analyzed. The validity of a scaling law initially derived in the framework of photo-double-ionization is discussed.
Brazilian Journal of Physics. Publicado em: 2007-09
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11. From integral to derivative dispersion relations
We demonstrate that integral dispersion relations for hadron-hadron scattering amplitudes can be replaced by differential relations, without the usual high-energy approximation. We obtain analytical expressions for the corrections associated with the low energy region and exemplify the applicability of the novel relations in the context of an analytical para
Brazilian Journal of Physics. Publicado em: 2007-07
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12. Measurement of the W + jet cross section at CDF
A measurement of W -> enu + n-jet cross sections in p$\bar{p}$ collisions at Ös = 1.96 TeV using the Collider Detector at Fermilab in Run II is presented. The measurement is based on an integrated luminosity of 320 pb-1, and includes events with jet multiplicity from > 1 to > 4. In each jet multiplicity sample the differential and c
Braz. J. Phys.. Publicado em: 2007-06