Semiclassical back reaction around a cosmic dislocation

The energy-momentum vacuum average of a conformally coupled massless scalar field vibrating around a cosmic dislocation (a cosmic string with a dislocation along its axis) is taken as source of the linearized semiclassical Einstein equations. The solution up to first order in the Planck constant is derived. Motion of a test particle is then discussed, showing that under certain circumstances a helical-like dragging effect, with no classical analogue around the cosmic dislocation, is induced by back reaction.Comment: Published version, 4 pages, no figures, REVTeX4 fil

Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids.

The objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and leaf:stem ratio had a low magnitude, even when the coefficient was estimated based on the harvests of better stabilization for the other variables. The hybrids achieved genotypic stabilization in the harvests made in the second rainy season. Harvests made in the rainy season provide greater repeatability and determination, and the inclusion of the dry-season harvest is detrimental to the process of selection of low-repeatability traits such as percentage of leaves

Confluent Orthogonal Drawings of Syntax Diagrams

We provide a pipeline for generating syntax diagrams (also called railroad diagrams) from context free grammars. Syntax diagrams are a graphical representation of a context free language, which we formalize abstractly as a set of mutually recursive nondeterministic finite automata and draw by combining elements from the confluent drawing, layered drawing, and smooth orthogonal drawing styles. Within our pipeline we introduce several heuristics that modify the grammar but preserve the language, improving the aesthetics of the final drawing.Comment: GD 201

Growth pattern of two Amazonian tree species.

IUFROLAT 2013. Disponibilizado online. Resumen

­Genotypic value in hybrid progenies of Panicum maximum Jacq.

Genetic breeding of forage plants has increasingly contributed to the release of more productive plants. In this regard, evaluating the genotypic value is essential when aiming to rank genotypes based on the mean free of environmental factors. Therefore, this study aimed to predict the genotypic value of agronomic and nutritive value characters of three progenies of Panicum maximum. Hybrids were evaluated in a clonal test in an incomplete-randomized design with three treatments (progenies 1, 2, and 3) and two replications (clones). Six harvests were performed at 25cm from the ground level throughout one year. Progeny 2 provided better results for total and leaf dry mass yield, regrowth, and height, and lower incidence of leaf spot. Progenies 1 and 3 had a better response for qualitative characters such as higher crude protein and digestibility and lower lignin and fiber content. Hybrid progenies of P. maximum have forage characters of interest for breeding, and when using ?Mombaça? grass as parents, the progeny stands out for leaf production and resistance to leaf spot and for ?Tanzania? grass as parent has resulted in better forage quality

Genetic parameters of agronomic characters in Panicum maximum hybrids.

This study was carried out with the objective of estimating the genetic parameters of agronomic traits in Panicum maximum hybrids. Genotypes obtained from the crosses between the sexual plants S10 and S12 and cultivars Tanzania and Mombasa were evaluated. The design was an incomplete blocks design with two replicates (clones) and 33 blocks. Each block was constituted by three lines or plots with nine plants each, which were evaluated in six harvests. All the characters presented low broad sense heritabilities for both the individual harvest and for the mean of harvests and a large difference between the heritability and the individual repeatability coefficient, which may be due to the high permanent environmental variance, mainly for forage dry matter and leaf dry matter. On the other hand, the percentage of leaves also presented low repeatability and permanent environmental variance. The genotypic coefficients of variation were high, except for leaf percentage, but they were also associated with high residual coefficients of variation. Both the broad sense heritabilities per harvest and for the mean of harvests were of moderate magnitude for the agronomic traits evaluated in hybrid individuals of P. maximum. On the other hand, there is variability for selection of important characters such as total and leaf dry matter yields and selection for leaf percentage needs a greater number of harvests to improve selection efficiency. The genotypes presented great variability for Bipolaris maydis leaf spot incidence and this character can be included in the P. maximum breeding program

Genetic parameters of agronomic characters in Panicum maximum hybrids.

This study was carried out with the objective of estimating the genetic parameters of agronomic traits in Panicum maximum hybrids. Genotypes obtained from the crosses between the sexual plants S10 and S12 and cultivars Tanzania and Mombasa were evaluated. The design was an incomplete blocks design with two replicates (clones) and 33 blocks. Each block was constituted by three lines or plots with nine plants each, which were evaluated in six harvests. All the characters presented low broad sense heritabilities for both the individual harvest and for the mean of harvests and a large difference between the heritability and the individual repeatability coefficient, which may be due to the high permanent environmental variance, mainly for forage dry matter and leaf dry matter. On the other hand, the percentage of leaves also presented low repeatability and permanent environmental variance. The genotypic coefficients of variation were high, except for leaf percentage, but they were also associated with high residual coefficients of variation. Both the broad sense heritabilities per harvest and for the mean of harvests were of moderate magnitude for the agronomic traits evaluated in hybrid individuals of P. maximum. On the other hand, there is variability for selection of important characters such as total and leaf dry matter yields and selection for leaf percentage needs a greater number of harvests to improve selection efficiency. The genotypes presented great variability for Bipolaris maydis leaf spot incidence and this character can be included in the P. maximum breeding program

Tolerância de variedades de mandioca a herbicidas aplicados em pré-emergência.

O alto custo da mão-de-obra de campo vem levando agricultores a utilizarem cada vez mais o uso do controle químico em lavouras de mandioca. Diante disso, o objetivo do trabalho foi avaliar a tolerância de variedades de mandioca cultivadas na Região Agreste de Alagoas aos herbicidas clomazone e flumioxazine aplicados sequencialmente. O experimento foi conduzido sob condições de campo, no município de Junqueiro, AL, na safra 2017/2018. Os tratamentos foram formados pela combinação de oito variedades de mandioca (Caravela, Pretinha, Sipeal 2, BRS Aramaris, São João da Barra, Cariri Branca, 8707-08 e 740-10) com a aplicação ou não dos herbicidas clomazone (1.260 g ha-1) e flumioxazine (100 g ha-1) em pré-emergência. A fitointoxicação foi avaliada visualmente aos 25 e 50 dias após a emergência das plantas. No período da colheita foram realizadas as seguintes avaliações: massa verde de folhas e de hastes, produtividade de raízes, rendimento de farinha, peso de farinha e teor de amido. Não foram verificadas diferenças significativas entre as variedades em relação a todas as características avaliadas. Todas as variedades de mandioca são tolerantes à aplicação dos herbicidas clomazone e flumioxazine em pré-emergência.bitstream/item/214641/1/BP-148-20-Santiago-v2.pd

Sistema Suprimato: recomendações para o manejo integrado de plantas daninhas na cultura da mandioca.

O objetivo desta publicação é apresentar o Sistema SupriMato, que é um programa, contendo diversas práticas agronômicas, desenvolvido para ser aplicado no manejo integrado de plantas daninhas na cultura da mandioca, bem como reportar um estudo de caso formatado para o ambiente de produção do Agreste/Tabuleiros Costeiros no Estado de Alagoas

Tentativa de suicídio: uma questão da enfermagem em emergência

Há pouco tempo o Brasil passou a enxergar o suicídio como um problema de saúde pública, lançando em 2006 as Diretrizes Nacionais para Prevenção do Suicídio. Viu-se a necessidade de criar um plano brasileiro a fim de desenvolver estratégias que visem a promoção, prevenção e recuperação da saúde como um todo. O objetivo dessa pesquisa será analisar o perfil epidemiológico de tentativa de suicídio no município de Volta Redonda, através dos Boletins de Atendimento Médico - BAM, onde conste como diagnóstico, tentativa de suicídio, no período de 2005 a 2010. Este estudo será realizado após autorização institucional do Centro de Atendimento Integral da saúde (CAIS) do bairro Aterrado, no município de Volta Redonda/RJ e, submissão ao Comitê de Ética em Pesquisa do UniFOA. A coleta de dados será feita no arquivo de prontuários da Instituição pesquisada, através de um formulário estruturado, constando dados sócio-demográficos, métodos que usaram para cometer a tentativa do suicídio e outras informações relevantes