Similarity renormalization group evolution of NNNN interactions within a subtractive renormalization scheme

We apply the similarity renormalization group (SRG) approach to evolve a nucleon-nucleon ($NN$) interaction in leading-order (LO) chiral effective field theory (ChEFT), renormalized within the framework of the subtracted kernel method (SKM). We derive a fixed-point interaction and show the renormalization group (RG) invariance in the SKM approach. We also compare the evolution of $NN$ potentials with the subtraction scale through a SKM RG equation in the form of a non-relativistic Callan-Symanzik (NRCS) equation and the evolution with the similarity cutoff through the SRG transformation.Comment: Talk given at 19th International IUPAP Conference on Few-Body Problems in Physics (FB19), Bonn, Germany, August 31st - September 5th, 200

Renormalization group invariance in pionless effective field theory for the NN system

We consider the NN interaction in pionless effective field theory (EFT) up to next-to-next-to-leading order (NNLO) and use a recursive subtractive renormalization scheme to describe NN scattering in the 1S0 channel. We fix the strengths of the contact interactions at a reference scale, chosen to be the one that provides the best fit for the phase-shifts, and then slide the renormalization scale by evolving the driving terms of the subtracted Lippmann-Schwinger equation through a non-relativistic Callan-Symanzik equation. The results show that such a systematic renormalization scheme with multiple subtractions is fully renormalization group invariant.Comment: Talk given at The 21st European Conference on Few-Body Problems in Physics, Salamanca, Spain, August 29th - September 3rd, 201

Similarity Renormalization Group Evolution of Chiral Effective Nucleon-Nucleon Potentials in the Subtracted Kernel Method Approach

Methods based on Wilson's renormalization group have been successfully applied in the context of nuclear physics to analyze the scale dependence of effective nucleon-nucleon ($NN$) potentials, as well as to consistently integrate out the high-momentum components of phenomenological high-precision $NN$ potentials in order to derive phase-shift equivalent softer forms, the so called $V_{low-k}$ potentials. An alternative renormalization group approach that has been applied in this context is the Similarity Renormalization Group (SRG), which is based on a series of continuous unitary transformations that evolve hamiltonians with a cutoff on energy differences. In this work we study the SRG evolution of a leading order (LO) chiral effective $NN$ potential in the $^1 S_0$ channel derived within the framework of the Subtracted Kernel Method (SKM), a renormalization scheme based on a subtracted scattering equation.Comment: Published versio

Environmental and Genetic Effects Upon Growth of Purebred and Crossbred Heifers at Beltsville, Jeanerette and Reidsville.

Data from the Southern Regional Dairy Cattle Breeding project (S-49) were analyzed by least square methods to evaluate genetic and environmental effects upon body weight and body weight gain. Data consisted of records on 1,352 purebred Ayrshire (A), Brown Swiss (S), Holstein (H) and Jersey (J) and 1,224 crossbred females. Sixty-one different major breed combinations were represented. Breed groups (PLB) represented proportion of a large breed (Brown Swiss and Holstein). According to this classification, six PLB groups existed at USDA, ARC, Beltsville, Maryland, four at Iberia Livestock Experimental Station, Jeanerette and eight at Georgia Coastal Plains Experimental Station, State Prison Farm, Reidsville, Georgia. Six linear body measurements were studied at 6, 12, 18 and 30 months of age at Beltsville and 6, 12, 18 and 24 months of age at Jeanerette. Linear measurements (cm) were wither height (WH), forechest depth (FCD), forechest girth (FCG), length from withers to pins (LWP), length from withers to hips (LWH) and length from hips to pins (LHP). Body weights were taken at birth and at 3-month intervals up to 21 months of age at Reidsville and up to 42 months at Beltsville and Jeanerette. Heterosis for body weight based upon overall mean of reciprocals (A x H, H x A, H x S, S x H, S x A and A x S) were 1.69% at birth, 4.68% at 6 months, 4.44% at 12 months, 5.90% at 18 months and 3.67% at 30 months for Beltsville. At Beltsville heterosis for linear body measurements ranged from 1.33% to 3.07% at 6 months, 0.58% to 1.45% at 12 months, 1.13% to 1.85% at 18 months and from 0.28% to 1.51% at 30 months of age. Birth weight (kg) least squares means and standard errors for PLB breed groups 0, 0.375, 0.5, 0.75, 0.875 and 1 were: 34.5 (+OR-) 0.7, 34.0 (+OR-) 1.1, 38.3 (+OR-) 0.6, 40.0 (+OR-) 0.7, 40.7 (+OR-) 1.3 and 39.6 (+OR-) 0.6. Body weight (kg) least squares means and standard errors at 15 months of age were: 308.7 (+OR-) 4.7, 341.4 (+OR-) 9.6, 347.0 (+OR-) 4.4, 365.1 (+OR-) 5.0, 371.4 (+OR-) 11.0 and 359.1 (+OR-) 3.8 at Beltsville. At Jeanerette, breed groups (PLB = 1) surpassed PLB = 0.5, PLB = 0.75 and PLB = 0.875 groups at all ages for linear body measurements and body weight. Birth weight (kg) least squares means and standard errors for PLB breed groups 0.5, 0.75, 0.875 and 1 were: 31.1 (+OR-) 0.9, 35.0 (+OR-) 0.9, 37.6 (+OR-) 1.3 and 36.1 (+OR-) 0.6. Body weight (kg) least squares means and standard errors at 15 months of age were: 263.4 (+OR-) 4.3, 278.4 (+OR-) 4.3, 281.0 (+OR-) 6.3 and 288.7 (+OR-) 3.4. Body weight (kg) taken at birth, 6, 12 and 18 months of age at Reidsville indicated that females of PLB group 1 were significantly heavier (P \u3c .01) than other PLB groups. The difference in weight between the PLB = 1 and PLB = 0 groups was approximately 40% at birth and 27% at 18 months of age. Birth weight (kg) least squares means and standard errors for PLB groups 0, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875 and 1 were: 23.4 (+OR-) 0.2, 27.9 (+OR-) 0.5, 29.9 (+OR-) 0.6, 30.8 (+OR-) 0.3, 31.8 (+OR-) 0.8, 34.6 (+OR-) 0.4, 35.9 (+OR-) 0.5 and 38.5 (+OR-) 0.2. Body weight (kg) least squares means and standard errors at 15 months of age were: 224.3 (+OR-) 1.8, 246.2 (+OR-) 3.0, 268.6 (+OR-) 4.3, 273.7 (+OR-) 2.2, 277.7 (+OR-) 5.0, 292.2 (+OR-) 2.5, 298.8 (+OR-) 3.5 and 299.9 (+OR-) 1.6 at Reidsville. The major cause of variation was due to PLB group size for all three stations. Pooled data (Jeanerette and Reidsville) analysis indicated that year by season interaction effects were significant (P \u3c .01) for all traits except weight at 3 months. Phenotypic correlations among body weight at different ages ranged from 0.573 to 0.902 at Reidsville

Spatial and Temporal Dynamics of Lekking Behavior and Female Mate Choice in the Blue-crowned Manakin (Lepidothrix coronata, AVES: Pipridae)

In lekking species, males aggregate at display grounds (?leks?) that females visit to copulate. Lekking systems are non-resource-based and males vary widely in reproductive output. This dissertation investigates how spatial and temporal factors influence lekking dynamics and female mate choice in the blue-crowned manakin Lepidothrix coronata. The first chapter deals with spatial dynamics of lekking behavior, and investigates whether leks are formed by the establishment of males on sites of high female density (?hotspot hypothesis?). Predictive maps of female spatial distribution were built based on field data and contrasted to the lek distribution. Leks were located in sites where males would encounter less females than expected by chance, partially as a result from differences in sex-specific habitat preferences. The second chapter is related to temporal aspects of lekking behavior, and investigates how leks are formed and change over time, and how leks, which are very traditional in location, can persist in face of relatively high male turnover. The fate of individual territorial males was followed for 4 years at up to 15 leks to estimate rates of male persistence at territories, recruitment, and expected tenure times. These estimates were used to simulate changes in lek size and composition over time. Results suggest that rates of male recruitment and disappearance compensate each other such that leks may persist for several decades after the original males have disappeared from them. In the third chapter, molecular analyses of paternity and behavioral observations were used to investigate the process of female mate choice at two spatial scales, within- and among-leks. Females moved beyond their regular home ranges to mate, suggesting that they increase travel costs to assess more potential mates. Although there was not a general preference for larger leks, females nesting close to small leks travelled further and mated at larger leks. Siring males were not less related to females or more heterozygous than expected by chance. Within leks, siring male were those with higher vocalization rates. Because vocalization rates changed according to lek sizes, however, they should not be a reliable indicator of male quality in most leks

Sorgo sacarino: tecnologia agronômica e industrial para alimentos e energia.

bitstream/item/44252/1/Revista-Agroenergia-3-1420.pdfEditorial

"Isoporização" em colmo de milho.

bitstream/CNPMS/19639/1/Com_138.pd

Prolificidade?

bitstream/item/40407/1/Prolificidade-habilidade.pd

Modelos de negócios tecnológicos na Embrapa e a parceria público-privada: elementos para articulação e acordos de cooperação científica, técnica e negocial para mercados competitivos de biomassa: o caso do sorgo-energia (sorgo sacarino e sorgo biomassa lignocelulósica).

A Embrapa, na sua missão, contribui para a agenda de desenvolvimento do Brasil. Com a adequada compreensão da exploração racional dos recursos naturais e o investimento em talentos humanos, a Embrapa qualifica e fornece elementos para dar suporte às políticas públicas, e articula e compartilha com a iniciativa privada a ampliação do atendimento às suas demandas por informações e conhecimentos para os negócios competitivos, em bases tecnológicas. De forma crescente, a complexidade técnico-científica e os aspectos legais da inovação requerem das empresas de Ciência, Tecnologia & Inovação (CT&I) mecanismos gerenciais e modelos de negócios tecnológicos capazes de alimentar os avanços institucionais, técnico-científicos e produtivos em mercados competitivos. A presente publicação objetiva oferecer os elementos básicos para o estabelecimento de acordos de cooperação pertinentes à Embrapa, e indicar caminhos para a qualificação adequada de demandas negociais e a construção de uma interlocução objetiva, prática e produtiva, a bem de uma agenda positiva para o Brasil, para as empresas e negócios produtivos, e para a sociedade em geral.bitstream/item/68881/1/doc-140-1.pd