A Study of Two-Temperature Non-Equilibrium Ising Models: Critical Behavior and Universality

We study a class of 2D non-equilibrium Ising models based on competing dynamics induced by contact with heat-baths at two different temperatures. We make a comparative study of the non-equilibrium versions of Metropolis, heat bath/Glauber and Swendsen-Wang dynamics and focus on their critical behavior in order to understand their universality classes. We present strong evidence that some of these dynamics have the same critical exponents and belong to the same universality class as the equilibrium 2D Ising model. We show that the bond version of the Swendsen-Wang update algorithm can be mapped into an equilibrium model at an effective temperature.Comment: 12 pages of LaTeX plus 18 pages of postscript figures in a uuencoded file (608k

Pesca: uma atividade estratégica para a conservação do Pantanal.

bitstream/item/70310/1/ADM152.pdfFormato eletronico. Disponível também em: Aquidauana News; Midia Max; Pantanal News; O Minuto; EcoFinanças; ECOA, ISE; TeSE

Magnetically controlled exciton transfer in hybrid quantum dot-quantum well nanostructures

A magnetophotoluminescence study of the carrier transfer with hybrid InAs/GaAs quantum dot(QD)-InGaAs quantum well (QW) structures is carried out where we observe an unsual dependence of the photoluminescence (PL) on the GaAs barrier thickness at strong magnetic field and excitation density. For the case of a thin barrier the QW PL intensity is observed to increase at the expense of a decrease in the QD PL intensity. This is attributed to changes in the interplane carrier dynamics in the QW and the wetting layer (WL) resulting from increasing the magnetic field along with changes in the coupling between QD excited states and exciton states in the QW and the WL

Development and reliability of an ultrasound protocol to evaluate quadriceps muscle mass and diaphragm structure: a pilot study

Purpose: This study aimed to evaluate the intra and inter-operator reliability of an ultrasound (US) protocol, to assess quadriceps muscle mass and diaphragm structure in healthy people, for future monitoring of patients with respiratory disease. Methods and Materials: Twelve volunteers (6♀, 31.8±10.6 years; BMI=23.4±3.7 kg/m2) participated. An US equipment (Logiq P6 PRO, GE) with a multifrequency linear probe (11L) was used. Three measures of Quadriceps (QTK) and Rectus Femoris thickness (RFTK), RF cross sectional area (RFArea), bilateral diaphragmatic thickness at maximal inspiration (DTKI) and at end expiration (DTKE) were obtained by one operator. Six volunteers were randomly evaluated by two operators. Mann Whitney test was used to assess differences between inspiration and expiration and the right and left hemi-diaphragm. The Intraclass Correlation Coefficient (ICC2,1) was used to explore reliability. Results: Mean RFTK were 1.72cm, 8.19cm2 for RFArea and 3.23cm for QTK. Significant differences were found between DTKI and DTKE both at right (0.31±0,17cm vs 0.23±0.19cm, p=0.01) and left hemi-diaphragm (0.37±0.18cm vs 0.24±0.14cm, p=0.01). No significant differences between the right and left hemi-diaphragms were observed during inspiration or expiration. Intra and inter-operator reliability were all Excellent: DTKE (intra: ICC2,1=0.977; inter: ICC2,1=0.822), DTKI (intra: ICC2,1=,0.903; inter: ICC2,1=0.805), QTK (intra: ICC2,1=0.976; inter: ICC2,1=0,940), RFArea (intra: ICC2,1=0.973; inter: ICC2,1=0.981) and RFTK (intra: ICC2,1=0.998 ; inter: ICC2,1=0.762). Conclusion: Results showed the feasibility and reliability of this US protocol in healthy people. One single measurement by one operator seems to be adequate. Bilateral diaphragmatic measurements might not be necessary in respiratory patient's evaluation.SAICT-POL/23926/2016publishe

Topology driven g-factor tuning in type-II quantum dots

We investigate how the voltage control of the exciton lateral dipole moment induces a transition from singly to doubly connected topology in type-II In As/Ga Asx Sb1−x quantum dots. The latter causes visible Aharonov-Bohm oscillations and a change of the exciton g factor, which are modulated by the applied bias. The results are explained in the frame of realistic →k⋅ →p and effective Hamiltonian models and could open a venue for new spin quantum memories beyond the In As/Ga As realm

Production and characterization of recombinant frutalin expressed in the yeast Pichia Pastoris

CNPq, CAPES, FUNCAP, FCT, ALBAN, UMINHO, UFC, UNIFO

Nuclear structure and reaction studies at SPIRAL

The SPIRAL facility at GANIL, operational since 2001, is described briefly. The diverse physics program using the re-accelerated (1.2 to 25 MeV/u) beams ranging from He to Kr and the instrumentation specially developed for their exploitation are presented. Results of these studies, using both direct and compound processes, addressing various questions related to the existence of exotic states of nuclear matter, evolution of new "magic numbers", tunnelling of exotic nuclei, neutron correlations, exotic pathways in astrophysical sites and characterization of the continuum are discussed. The future prospects for the facility and the path towards SPIRAL2, a next generation ISOL facility, are also briefly presented.Comment: 48 pages, 27 figures. Accepted for publication in Journal of Physics

Desempenho de cultivares de milho no Nordeste Brasileiro : Safra 2012/2013.

A escolha da cultivar é uma das decisões sobre a qual se fundamenta o êxito de qualquer empreendimento agrícola.bitstream/item/122985/1/Desempenho-de-cultivares-Cot-137.pd

Pathway to an excitonic coherence

This paper discusses the combined effects of optical excitation power, interface roughness, lattice temperature, and applied magnetic fields on the spin-coherence of excitonic states in GaAs/AlGaAs multiple quantum wells. For low optical powers, at lattice temperatures between 4 K and 50 K, the scattering with acoustic phonons and short-range interactions appear as the main decoherence mechanisms. Statistical fluctuations of the band-gap however become also relevant in this regime and we were able to deconvolute them from the decoherence contributions. The circularly polarized magneto-photoluminescence unveils a non-monotonic tuning of the coherence for one of the spin components at low magnetic fields. This effect has been ascribed to the competition between short-range interactions and spin-flip scattering, modulated by the momentum relaxation time