Produção de limas ácidas, tangerineira e híbridos sobre diferentes porta-enxertos no Estado do Acre.

O objetivo deste trabalho foi de avaliar o comportamento das limas ácidas 'Tahiti' (Citrus latifólia Tanaka) e 'Galego' (Citrus aurantifolia Swingle), da tangerina (Citrus reticulata Blanco) 'Cravo', e dos híbridos tangelo 'Lee' e tangor 'Murcott', enxertadas sobre quatro porta-enxertos: limão 'Cravo' (Citrus limonia Osb.), citrange 'Carrizo' (Citrus sinensis (L.) Osb. x Poncirus trifoliata Raf.) e tangerinas 'Sunki' (Citrus sunki Hort. Ex Tan.) e 'Cleópatra' (Citrus reshni ex Hort. Tan.). Os experimentos foram conduzidos no campo experimental da Embrapa Acre, Amazônia, Brasil. A lima ácida 'Tahiti' apresentou a maior produção média de frutos (115,14 kg/planta), produção por volume de copa (2,49 kg m-3) e número de frutos (836,80/planta), quando enxertada sobre a tangerina 'Sunki'. A lima ácida 'Galego' apresentou a maior produção média de frutos (126,81 e 85,80 kg/planta), produção por volume de copa (1,82 e 1,28 kg m-3) e número de frutos (2.619,93 e 1.810,80/planta) quando enxertada, respectivamente, sobre o citrange 'Carrizo' e limão 'Cravo'. O porta-enxerto limão 'Cravo' induziu uma maior produção média (90,65 kg/planta) em todas as cultivares de tangerina e híbridos. Apesar das copas apresentarem comportamentos semelhantes para todas as características avaliadas, com exceção do índice de conformação, a cultivar 'Murcott' apresentou uma boa produção média (69,67 kg/planta) e número médio de frutos (500,94/planta) sobre a tangerina 'Sunki'

Monitoramento de mastite e determinação da composição do leite em ovelhas Santa Inês de primeiro parto.

bitstream/item/82445/1/BP-66.pd

Scaling anomaly in cosmic string background

We show that the classical scale symmetry of a particle moving in cosmic string background is broken upon inequivalent quantization of the classical system, leading to anomaly. The consequence of this anomaly is the formation of single bound state in the coupling interval \gamma\in(-1,1). The inequivalent quantization is characterized by a 1-parameter family of self-adjoint extension parameter \omega. It has been conjectured that the formation of loosely bound state in cosmic string background may lead to the so called anomalous scattering cross section for the particles, which is usually seen in molecular physics.Comment: 4 pages,1 figur

Genetic structure of Bertholletia excelsa populations from the Amazon at different spatial scales.

Population genetic structure and genetic diversity levels are important issues to understand population dynamics and to guide forest management plans. The Brazil nut tree (Bertholletia excelsa Bonpl.) is an endemic species, widely distributed through Amazonian upland forests and also an important species for the local extractive economy. Our aim was to analyze the genetic structure of Brazil nut trees at both fine and large scales throughout the Amazon Basin, contributing to the knowledge base on this species and to generate information to support plans for its conservation. We genotyped individuals from nine sites distributed in five regions of the Brazilian Amazon using 11 microsatellite loci. We found an excess of heterozygotes in most populations, with significant negative inbreeding coefficients (f) for five of them and the finescale structure, when present, was very small. These results, as a consequence of self-incompatibility, indicate that conservation plans for B. excelsa must include the maintenance of genetic diversity within populations to ensure viable amounts of seeds for both economic purposes and for the local persistence of the species.Published online: 24 March 2015

IK-FA, a new heuristic inverse kinematics solver using firefly algorithm

In this paper, a heuristic method based on Firefly Algorithm is proposed for inverse kinematics problems in articulated robotics. The proposal is called, IK-FA. Solving inverse kinematics, IK, consists in finding a set of joint-positions allowing a specific point of the system to achieve a target position. In IK-FA, the Fireflies positions are assumed to be a possible solution for joints elementary motions. For a robotic system with a known forward kinematic model, IK-Fireflies, is used to generate iteratively a set of joint motions, then the forward kinematic model of the system is used to compute the relative Cartesian positions of a specific end-segment, and to compare it to the needed target position. This is a heuristic approach for solving inverse kinematics without computing the inverse model. IK-FA tends to minimize the distance to a target position, the fitness function could be established as the distance between the obtained forward positions and the desired one, it is subject to minimization. In this paper IK-FA is tested over a 3 links articulated planar system, the evaluation is based on statistical analysis of the convergence and the solution quality for 100 tests. The impact of key FA parameters is also investigated with a focus on the impact of the number of fireflies, the impact of the maximum iteration number and also the impact of (a, ß, ¿, d) parameters. For a given set of valuable parameters, the heuristic converges to a static fitness value within a fix maximum number of iterations. IK-FA has a fair convergence time, for the tested configuration, the average was about 2.3394 × 10-3 seconds with a position error fitness around 3.116 × 10-8 for 100 tests. The algorithm showed also evidence of robustness over the target position, since for all conducted tests with a random target position IK-FA achieved a solution with a position error lower or equal to 5.4722 × 10-9.Peer ReviewedPostprint (author's final draft

Inverse Orbital Torque via Spin-Orbital Entangled States

While current-induced torque by orbital current has been experimentally found in various structures, evidence for its reciprocity has been missing so far. Here, we report experimental evidences of strong inverse orbital torque in YIG/Pt/CuOx (YIG = Y3Fe5O12) mediated by spin-orbital entangled electronic states in Pt. By injecting spin current from YIG to Pt by the spin pumping via ferromagnetic resonance and by the spin Seebeck effect, we find a pronounced inverse spin Hall effect-like signal. While a part of the signal is explained as due to the inverse spin-orbital Hall effect in Pt, we also find substantial increase of the signal in YIG/Pt/CuOx structures compared to the signal in YIG/Pt. We attribute this to the inverse orbital Edelstein effect at Pt/CuOx interface mediated by the spin-orbital entangled states in Pt. Our work paves the way toward understanding of spin-orbital entangled physics in nonequilibrium and provides a way for electrical detection of the orbital current in orbitronic device applications.Comment: 8 pages, four figure

Predição do fracionamento de carboidratos da cana-de-açúcar com base em componentes fibrosos.

Objetivando desenvolver e validar modelos de predição do fracionamento de carboidratos da cana-de-açúcar com base em componentes fibrosos, foram realizadas determinações em triplicata da fibra em detergente neutro (FDN), lignina (LIG), fração A+B1, B2 e C dos carboidratos de 15 variedades de cana-de-açúcar (Saccharum spp.), colhidas aos 426, 487 e 549 dias apÓs para compor um banco de dados para ser utilizado no desenvolvimento e validação de equações de predição das frações dos carboidratos. As equações desenvolvidas foram para A+B1 = 101,21052- 1,06067FDN (R2 = 99,13) e para fração C = -16,51672 +O,34406FDN +1,2103L1g (R2 = 99,55). A fração B2 foi obtida por diferença 100- (A+B1+C). Com base nos valores de P observados, pode-se inferir que todas as equações propostas são precisas, pois nelas o intercepto (130) não foi significativamente (P>0,05) diferente de zero e a inclinação (131) não foi significativamente diferente de 1. As equações desenvolvidas para predição das frações A+B1, B2 e C dos carboidratos são precisas e podem ser utilizadas com segurança