Fine-Tuning Solution for Hybrid Inflation in Dissipative Chaotic Dynamics

We study the presence of chaotic behavior in phase space in the pre-inflationary stage of hybrid inflation models. This is closely related to the problem of initial conditions associated to these inflationary type of models. We then show how an expected dissipative dynamics of fields just before the onset of inflation can solve or ease considerably the problem of initial conditions, driving naturally the system towards inflation. The chaotic behavior of the corresponding dynamical system is studied by the computation of the fractal dimension of the boundary, in phase space, separating inflationary from non-inflationary trajectories. The fractal dimension for this boundary is determined as a function of the dissipation coefficients appearing in the effective equations of motion for the fields.Comment: 10 pages, 4 eps figures (uses epsf), Revtex. Replaced with version to match one in press Physical Review

Contextual structures and interaction dynamics in the Brazilian Biogas Innovation System

Although biogas technologies in Brazil have a huge potential and a long history few studies have examined biogas in Brazil as a technological field. Accordingly, this paper aims to understand which conditions enabled or constrained the diffusion of biogas technologies. More specifically, this research applies and adapts the Technological Innovation System (TIS) framework to examine biogas-specific and context-related conditions as well as their interplay. Data were collected by performing an event history analysis from 1979 to 2016 along with 24 in-depth expert interviews. Our findings indicate that the evolution of geographically embedded sectoral regulations and infrastructures as well as their interactions have been responsible for major changes in the biogas field in Brazil. By demonstrating how this occurred, this research has opened up new possibilities to promote biogas technologies in Brazil. This study also provides an important analytical method that focuses on exploring activities and their background conditions to consider contextual influences in TIS. Consequently, three major ways of contextual influences for TIS studies are suggested – evolution of contextual structures, interaction of contextual structures and translation of external events by these interactions

Central Exclusive Production at LHCb

The search for central exclusive production of muon pairs is performed using the LHCb data acquired on 2011 ($\sqrt{s} = 7$ TeV) and 2012 ($\sqrt{s} = 8$ TeV). Preliminary measurements of cross section using these samples are showed and a first comparison with theoretical previews is presented

Potencial terapêutico e uso de plantas medicinais em uma área de Caatinga no estado do Ceará, nordeste do Brasil

O presente trabalho visou o levantamento etnobotânico das plantas medicinais, verificando a versatilidade das espécies utilizadas e o consenso de uso e/ou conhecimento entre os informantes, do Distrito de Aratama, no Município de Assaré, Ceará. As informações etnobotânicas foram obtidas através de entrevistas estruturadas e semi-estruturadas com os moradores locais. Foram citadas 116 espécies com fins medicinais pertencentes a 103 gêneros e 58 famílias com destaque para Fabaceae (10ssp.), Asteraceae (7spp.) e Lamiaceae (6spp.). Entre as espécies levantadas, Mentha spicata L., Rosmarinus officinalis L., Allium sativum L., Bauhinia cheilantha (Bong.), Ximenea americana L., se destacaram como as mais versáteis dentro da comunidade. As indicações terapêuticas citadas foram agrupadas em 16 categorias de sistemas corporais, dos quais as Desordens mentais e comportamentais, as Afecções ou dores não definidas, os Transtornos do sistema respiratório, as Doenças de pele e do tecido celular subcutâneo, e os Transtornos do sistema sensorial (ouvidos), mostram maior concordância entre os informantes na utilização de espécies para tratar um sistema corporal especifico. Os resultados mostraram elevada riqueza da flora medicinal presente na caatinga. Neste sentido, torna-se necessária a intensificação de estudos que avaliem e consolidem as propriedades químicas e farmacológicas destas espécies

Contextual structures and interaction dynamics in the Brazilian Biogas Innovation System

Although biogas technologies in Brazil have a huge potential and a long history few studies have examined biogas in Brazil as a technological field. Accordingly, this paper aims to understand which conditions enabled or constrained the diffusion of biogas technologies. More specifically, this research applies and adapts the Technological Innovation System (TIS) framework to examine biogas-specific and context-related conditions as well as their interplay. Data were collected by performing an event history analysis from 1979 to 2016 along with 24 in-depth expert interviews. Our findings indicate that the evolution of geographically embedded sectoral regulations and infrastructures as well as their interactions have been responsible for major changes in the biogas field in Brazil. By demonstrating how this occurred, this research has opened up new possibilities to promote biogas technologies in Brazil. This study also provides an important analytical method that focuses on exploring activities and their background conditions to consider contextual influences in TIS. Consequently, three major ways of contextual influences for TIS studies are suggested – evolution of contextual structures, interaction of contextual structures and translation of external events by these interactions

Raquitismo debido a deficiencia crónica de fósforo: reporte de un brote en bovinos de carne criado en pasturas naturales.

El objetivo del trabajo es describir un brote de raquitismo en terneros de carne criados en pasturas nativas