On the origins of scaling corrections in ballistic growth models

We study the ballistic deposition and the grain deposition models on two-dimensional substrates. Using the Kardar-Parisi-Zhang (KPZ) ansatz for height fluctuations, we show that the main contribution to the intrinsic width, which causes strong corrections to the scaling, comes from the fluctuations in the height increments along deposition events. Accounting for this correction in the scaling analysis, we obtained scaling exponents in excellent agreement with the KPZ class. We also propose a method to suppress these corrections, which consists in divide the surface in bins of size $\varepsilon$ and use only the maximal height inside each bin to do the statistics. Again, scaling exponents in remarkable agreement with the KPZ class were found. The binning method allowed the accurate determination of the height distributions of the ballistic models in both growth and steady state regimes, providing the universal underlying fluctuations foreseen for KPZ class in 2+1 dimensions. Our results provide complete and conclusive evidences that the ballistic model belongs to the KPZ universality class in $2+1$ dimensions. Potential applications of the methods developed here, in both numerics and experiments, are discussed.Comment: 8 pages, 7 figure

Dos maus tratos ao bom cuidado

Este trabalho explorou a ideia de que os maus-tratos emergem em contexto relacional de prestação de cuidados e deste modo constituem ou são uma consequência direta de cuidados inadequados. Esta formulação privilegia mais o olhar para os maus tratos como uma prática inadequada de cuidados do que uma forma de violência. Isto não significa que se olhem os maus tratos como não sendo violência. Significa tão só uma estratégia de olhar para o fenómeno que permite identificar mais rapidamente necessidades de formação e de alteração de práticas, que não são práticas apenas para com o recetor de cuidados, mas para com a própria pessoa que presta o cuidado.Este trabalho foi desenvolvido no Centro de Investigação em Psicologia (PSI/01662), Universidade do Minho, e foi financeiramente suportado pela Fundação para a Ciência e Tecnologia e pelo Ministério da Ciência, Tecnologia e Ensino Superior, através de fundos nacionais, e co-financiado pelo FEDER, através do COMPETE2020, no âmbito do acordo Portugal 2020 (POCI-01-0145-FEDER-007653). O primeiro autor foi financiado por uma bolsa da Fundação Portuguesa para a Ciência e Tecnologia - FCT - (PD/BD/105965/2014).info:eu-repo/semantics/publishedVersio

Brief survey on computational solutions for Bayesian inference

In this paper, we present a brief review of research work attempting to tackle the issue of tractability in Bayesian inference, including an analysis of the applicability and trade-offs of each proposed solution. In recent years, the Bayesian approach has become increasingly popular, endowing autonomous systems with the ability to deal with uncertainty and incompleteness. However, these systems are also expected to be efficient, while Bayesian inference in general is known to be an NP-hard problem, making it paramount to develop approaches dealing with this complexity in order to allow the implementation of usable Bayesian solutions. Novel computational paradigms and also major developments in massively parallel computation technologies, such as multi-core processors, GPUs and FPGAs, provide us with an inkling of the roadmap in Bayesian computation for upcoming years

Apple juice reverse the oxidative effect of vanadium pentoxide in Saccharomyces cerevisiae

The Malus domestica, Borkh, tients for over 2500 years, was domesticated and expanded in Europe by the Greeks and Romans. Due to their high adaptability to different climates and soils, the apple orchards were quickly installed throughout the world, from countries with relatively cool to subtropical climates. In Portugal, Romans have carried out their introduction and later by religious influence led to the spread of different varieties. The region of Beira Alta, Portugal, with its diversity of microclimates, of harsh winters and hot summers with high brightness, distinguished himself early as a conducive area to apple growing, being denominated IPG ( Protect geographical region) for the Golden Delicious variety. In the literature phenolic compounds of apples are described as potential inhibitors of oxidative processes, involving reactive oxygen species (ROS), implicated in chronic disorders such as cancer and cardiovascular disease. The main objective of this study was to evaluate the role of Golden Delicious apple juice in cell proliferation of yeast S. cerevisiae UE-ME3, and stress molecular markers, in the presence of a well-know oxidant, vanadium pentoxide

Caracterização nutritiva, antioxidante e de conservação da variedade tradicional de maçã Bravo de Esmolfe da Beira Alta

A capacidade antioxidante da variedade Bravo de Esmolfe medida pelo DPPH e pelo FRAP manteve-se estável ao longo do período de conservação de 83 dias, a 4 ºC (p <0,05). Por outro lado esta variedade exibiu propriedades de conservação promissoras, tendo em conta o nível baixo e tardio da actividade PPO detectada. O aumento do teor em glúcidos redutores e em fenóis ao longo do período de conservação de 83 dias, com um máximo no segundo caso aos 55 dias, seguido pelo máximo de actividade POD, sugere a ocorrência de um aumento da formação de peróxidos ao longo do tempo, acompanhado pela concentração de glúcidos redutores (p <0,05)

Binary combinations of atrazine and isoproturon influence cell growth and the glutathione cycle in Saccharomyces cerevisiae

The widely use of herbicides such as atrazine (ATZ) and Isoproturon (IPU) in agriculture has increased their environmental circulation, leading to their accumulation in water and soil. The consumption of water and food from these ecosystems can drastically compromise human health and well-being. Although ATZ and IPU can be found in numerous combinations in nature, most research involving these pollutants only analyses the toxicity of each molecule in non-target organisms. Thus, the aim of this work was to evaluate if and how binary combinations of ATZ and IPU M (25:5; 50:5) significantly affect the growth and antioxidant mechanisms of Saccharomyces cerevisiae, a Crabtree-positive yeast. The findings show that exposure to those binary combinations of ATZ and IPU favored the Crabtree effect with an increase in cell proliferation, in terms of viability and specific growth rate, and a slowdown in antioxidant activity mediated by the glutathione cycle