Non universality of entanglement convertibility

Recently, it has been suggested that operational properties connected to quantum computation can be alternative indicators of quantum phase transitions. In this work we systematically study these operational properties in 1D systems that present phase transitions of different orders. For this purpose, we evaluate the local convertibility between bipartite ground states. Our results suggest that the operational properties, related to non-analyticities of the entanglement spectrum, are good detectors of explicit symmetries of the model, but not necessarily of phase transitions. We also show that thermodynamically equivalent phases, such as Luttinger liquids, may display different convertibility properties depending on the underlying microscopic model.Comment: 5 pages + references, 4 figures - improved versio

Aspectos computacionais da implementaçao da formulaçao diferencial aplicada à análise reológica de barragens de concreto

Neste artigo sáo apresentadas as formulaçóes integral e diferencial para a modelizacão matemática do problema reológico do concreto, assim como a correspondencia entre as duas formulaçoes. Sáo então apresentados exemplos numéricos visando uma comparacáo da eficiencia computacional de algoritmos baseados nos dois tipos de modelizaçao.Peer Reviewe

Photonic superdiffusive motion in resonance radiation trapping

In this work we consider the relation between the jump length probability density function and the line shape function in resonance radiation trapping in atomic vapors. The two-sided jump length probability density function suitable for a unidimensional formulation of radiative transfer is also derived. As a side result, a procedure to obtain the Maxwell distribution of velocities from the Maxwell-Boltzmann distribution of speeds was obtained. General relations that give the asymptotic jump length behavior and the Lévy flight parameter niu for any line shape are obtained. The results are applied to generalized Doppler, generalized Lorentz, and Voigt line shape functions. It is concluded that the lighter the tail of the line shape function, the less heavy the tail of the jump length probability density function, although this tail is always heavy, with niu <= 1

Genomic African and Native American Ancestry and Chagas Disease: The Bambui (Brazil) Epigen Cohort Study of Aging.

BackgroundThe influence of genetic ancestry on Trypanosoma cruzi infection and Chagas disease outcomes is unknown.Methodology/principal findingsWe used 370,539 Single Nucleotide Polymorphisms (SNPs) to examine the association between individual proportions of African, European and Native American genomic ancestry with T. cruzi infection and related outcomes in 1,341 participants (aged ≥ 60 years) of the Bambui (Brazil) population-based cohort study of aging. Potential confounding variables included sociodemographic characteristics and an array of health measures. The prevalence of T. cruzi infection was 37.5% and 56.3% of those infected had a major ECG abnormality. Baseline T. cruzi infection was correlated with higher levels of African and Native American ancestry, which in turn were strongly associated with poor socioeconomic circumstances. Cardiomyopathy in infected persons was not significantly associated with African or Native American ancestry levels. Infected persons with a major ECG abnormality were at increased risk of 15-year mortality relative to their counterparts with no such abnormalities (adjusted hazard ratio = 1.80; 95% 1.41, 2.32). African and Native American ancestry levels had no significant effect modifying this association.Conclusions/significanceOur findings indicate that African and Native American ancestry have no influence on the presence of major ECG abnormalities and had no influence on the ability of an ECG abnormality to predict mortality in older people infected with T. cruzi. In contrast, our results revealed a strong and independent association between prevalent T. cruzi infection and higher levels of African and Native American ancestry. Whether this association is a consequence of genetic background or differential exposure to infection remains to be determined

Kinetic Modeling of 1‐G Ethanol Fermentations

The most recent rise in demand for bioethanol, due mainly to economic and environmental issues, has required highly productive and efficient processes. In this sense, mathematical models play an important role in the design, optimization, and control of bioreactors for ethanol production. Such bioreactors are generally modeled by a set of first‐order ordinary differential equations, which are derived from mass and energy balances over bioreactors. Complementary equations have also been included to describe fermentation kinetics, based on Monod equation with additional terms accounting for inhibition effects linked to the substrate, products, and biomass. In this chapter, a reasonable number of unstructured kinetic models of 1‐G ethanol fermentations have been compiled and reviewed. Segregated models, as regards the physiological state of the biomass (cell viability), have also been reviewed, and it was found that some of the analyzed kinetic models are also applied to the modeling of second‐generation ethanol production processes

Epistemology of psychopathology

Sem informação22468268

Towards a sanitation safety plan in the city of braga

A gestão integrada das infra-estruturas urbanas de água e saneamento constitui um desafio das cidades ambientalmente sustentáveis. Alguns avanços no controlo de qualidade dos sistemas de abastecimento de água para consumo humano, baseado em avaliação e gestão de riscos para a saúde pública, têm sido conseguidos através da implementação de planos de segurança da água. Com base nesta metodologia propõem-se, neste trabalho, contributos para a implementação de planos de segurança de saneamento, cobrindo-se, desta forma, todo o ciclo urbano da água com princípios de gestão de riscos. Com esta abordagem, estrutura-se um plano de segurança de saneamento onde são identificados eventos perigosos, avaliados e priorizados riscos para a saúde pública e para o ambiente, assim como se estabelecem medidas de controlo ao longo de todo o sistema de saneamento, percorrendo todas as etapas que o constituem: recolha, tratamento, lançamento no ambiente e reutilização segura de águas residuais. Estes conceitos foram aplicados ao sistema de saneamento da área central da cidade de Braga, para o qual se criou expressamente uma ferramenta informática de suporte, focada nos módulos principais da estrutura de um plano de segurança de saneamento.The integrated management of urban water and sanitation infrastructure is a challenge for environmentally sustainable cities. Positive developments in quality control in drinking water supply systems, based on risk assessment and risk management for public health, have been achieved through the implementation of water safety plans. Based on this methodology, the present work gives contributions for sanitation safety plans implementation. In this way, the urban water cycle is covered with risk management principles. With this approach, a sanitation safety plan is structured in which hazardous events to public health and environment are identified. Also risk assessment, risk prioritization and control measures are established throughout the sanitation system, covering all its steps: collection, treatment, disposal in receiving waters and safe reuse of treated wastewater. These concepts have been applied to the sanitation system of the central area of the city of Braga, for which a support software tool was expressly created, focusing in the core structural modules of a sanitation safety plan

Fast batch injection analysis system for on-site determination of ethanol in gasohol and fuel ethanol

AbstractA simple, accurate and fast (180injectionsh−1) batch injection analysis (BIA) system with multiple-pulse amperometric detection has been developed for selective determination of ethanol in gasohol and fuel ethanol. A sample aliquot (100μL) was directly injected onto a gold electrode immersed in 0.5molL−1 NaOH solution (unique reagent). The proposed BIA method requires minimal sample manipulation and can be easily used for on-site analysis. The results obtained with the BIA method were compared to those obtained by gas-chromatography and similar results were obtained (at 95% of confidence level)