Global aspects of gravitomagnetism

We consider global properties of gravitomagnetism by investigating the gravitomagnetic field of a rotating cosmic string. We show that although the gravitomagnetic field produced by such a configuration of matter vanishes locally, it can be detected globally. In this context we discuss the gravitational analogue of the Aharonov-Bohm effect.Comment: 10 pages - Typeset using REVTE

Influence of açai fruits (Euterpe oleracea Mart.) conservation on the acceptance of açai drink.

The açai drink is consumed habitually by populations of northern Brazil, but one of the major bottlenecks in the production of this drink is the seasonality of fruit production. Hence the needs to study the influence of cold storage on the transport of fruits from distant locations, such as the archipelago of Bailique (AP, Brazil) until the consumer centers. In this context, fruits collected and packaged under refrigeration and room temperatures were transported by boat for twelve hours and were subsequently processed in a mixer. Sensory analysis was performed in two consecutive days and the samples were stored under refrigeration. This analysis was performed by affective method with global acceptance (n=54) and the samples presented in a balanced way. It was used a hedonic scale with 9 points, ranging from like extremely (9) to dislike extremely (1). The results show that cold storage of the fruits affected significantly (p=0.002467) the acceptance of beverages in both two days of sensory evaluation. On the first day, the drink originated from fruits transported at cold storage received note 8 (liked a lot), while the drink from fruits at room temperature reached grade 7 (like moderately). On the second day of evaluation, the drink from refrigerated fruits received note 7 (like moderately) and drink from fruits stored at room temperature obtained note 5 (indifferent). Considering the type of preservation of fruits, no sensory difference was detected between the drinks from refrigerated fruits served on the two consecutive days, as well as no significant difference in drink of fruits transported at room temperature in this same period. It was concluded that açai fruits collected in regions distant from the consumer center, but kept under refrigeration, produce a drink with a considerable acceptance level, and they could be an alternative for supply of raw material during the off season.Resumo P1.5.010

Diagnóstico socioeconômico do Projeto de Reflorestamento Econômico Consorciado e Adensado - RECA.

Este trabalho visa analisar as variáveis que influenciam no modelo atual de exploração utilizado no Reca, tais como: origem, experiência dos produtores, crédito financeiro, documentação das propriedades, caracterização e disponibilidade de mão-de-obra na propriedade.bitstream/CPAF-AC/1555/1/cirtec20.pd

Self-similar magnetoresistance of Fibonacci ultrathin magnetic films

We study numerically the magnetic properties (magnetization and magnetoresistance) of ultra-thin magnetic films (Fe/Cr) grown following the Fibonacci sequence. We use a phenomenological model which includes Zeeman, cubic anisotropy, bilinear and biquadratic exchange energies. Our physical parameters are based on experimental data recently reported, which contain biquadratic exchange coupling with magnitude comparable to the bilinear exchange coupling. When biquadratic exchange coupling is sufficiently large a striking self-similar pattern emerges.Comment: 5 pages, 5 EPS figures, REVTeX, accepted for publication in Phys. Rev.

Avaliação sensorial de variedades de mandioca de mesa com raízes de cores diversas.

Este trabalho teve como objetivo avaliar a aceitabilidade de uma cultivar de raiz de cor amarela provavelmente com maior teor de carotenóides, através de teste sensorial em escala hedônica, por consumidores que têm preferência cultural por mandioca de mesa de raiz com cor variando de branca a creme

Non-relativistic quantum systems on topological defects space-times

We study the behavior of non-relativistic quantum particles interacting with different potentials in the space-times generated by a cosmic string and a global monopole. We find the energy spectra in the presence of these topological defects and show how they differ from their free space-time values.Comment: 17 pages, LATEX fil