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The Brazilian National Institute for Space Research (INPE) produces official information about deforestation as well as land use and cover in the country, based on remote sensing images. The current open data policy adopted by many space agencies and governments worldwide provided access to petabytes of remote sensing images. To properly deal with this vast amount of images, novel technologies have been proposed and developed based on cloud computing and big data systems. This paper describes the INPE’s initiatives in using remote sensing images and cloud services of the Amazon Web Services (AWS) infrastructure to improve land use and cover monitoring.

Este trabalho é parte de uma pesquisa a ser apresentada em um programa de mestrado em Educação. Nossa motivação surge com o atual contexto das transformações que geram mudanças em nossa sociedade e nos sistemas educacionais. O professor e sua formação vêm sendo questionados quanto ao seu papel em meio a tantas transformações. Pensamos que o conhecimento dos saberes e das práticas docentes possibilita melhor compreensão dos processos educacionais. Assim, nos propomos a analisar os discursos sobre as práticas de dois professores de Física novatos para identificar saberes que constituem suas identidades e pesquisar como esses discursos remetem à formação inicial. Utilizamos a teoria de Mikhail Bakhtin para a análise do discurso. É possível notar a existência de marcas comuns da Formação Inicial, ao mesmo tempo em que os professores fazem escolhas por trajetórias diferentes.

Brazil is a middle-income country undergoing the epidemiological transition. Effects of changes in daily life habits, and access to clean water, sanitation and urban services on a growing urban population have contributed to a double burden of both infectious and non-communicable chronic diseases. Studies have indicated that parasite infections may modulate the human immune system and influence the development of allergic conditions such as asthma. However, there is no consensus in the published literature on the effects of parasitic infections on allergy, perhaps as a consequence of factors determining the epidemiology of these infections that vary between populations such as age of first infection, duration and chronicity of infections, parasite burden and species, and host genetic susceptibility. In this review, we discuss the observations from Brazil concerning the relationship between parasite infections and allergy. This article is protected by copyright. All rights reserved.

Usually, the analysis of structures under wind loading is performed using an equivalent static analysis, where the influence of floating response is taken into account by the gust factor. This methodology can be used in case of rigid structures for not presenting a considerable dynamic response. More flexible structures, in particular those lightly damped, may show an important resonant response and their dynamic properties must be considered in the analysis. The aim of this paper is to present a methodology for dynamic analysis of structures under wind loading considering the geometric nonlinearity, the vibration caused by the kinetic energy of wind gusts and the aerodynamic damping due to the relative movement between this structure and the wind. The formulation proposed is applied to a 180-meter-high concrete chimney and the results were compared with those obtained through the recommendation given in the standard ABNT NBR 6123:1988 [2] for the dynamic structural analysis. Resumo Tradicionalmente, estruturas submetidas ao vento são avaliadas através de análises estáticas com carregamentos equivalentes, onde a influência da resposta flutuante é levada em conta por meio do fator de rajada. Essa metodologia é aplicável a estruturas suficientemente rígidas para não apresentarem resposta dinâmica ponderável [ ]. Estruturas mais flexíveis, em particular aquelas fracamente amortecidas, podem apresentar importante resposta ressonante e devem ter suas propriedades dinâmicas consideradas na análise. O objetivo deste artigo é apresentar uma metodologia para a análise dinâmica de estruturas submetidas ao vento considerando a não-linearidade geométrica, a vibração causada pela energia cinética das rajadas de vento e o amortecimento aerodinâmico devido ao movimento relativo entre a estrutura e o vento. A metodologia proposta é aplicada à estrutura de uma chaminé de concreto com 180 metros de altura, sendo os resultados comparados com os obtidos através das recomendações da norma ABNT NBR 6123:1988 [ ] para a análise dinâmica de estruturas.

It is well known that explosive volcanic eruptions pose serious hazards to local communities and may have worldwide impacts. However, the products of explosive eruptions on volcanic ocean islands are almost inevitably incompletely preserved as a significant portion of the erupted material is deposited into the ocean, thereby impeding our ability to accurately reconstruct past events, determine eruptive source parameters and ultimately assess the associated hazards. Sete Cidades is the westernmost central volcano of São Miguel Island, Azores. Although currently dormant, it has been the most active volcano on the island in the last 5 ky, with at least 17 trachytic explosive eruptions, some of which sub-Plinian, that took place inside the summit caldera. The last paroxysmal explosive eruption took place at ∼16 ka, enlarging the caldera to its present dimensions, and is recorded by the Santa Bárbara Formation. We here present evidence of a mid-distal deposit (>25 km from the vent) that can be correlated with the proximal (on Sete Cidades volcanic edifice) pumice fall deposit of the Santa Bárbara Formation based on deposit characteristics, textural features and geochemistry. This is the first evidence of a decimeter-thick deposit of Sete Cidades volcano in the central part of São Miguel Island, which allows to constrain eruptive source parameters and wind conditions. Given the predominant winds blowing from westerly directions, Sete Cidades is considered the most hazardous volcano for the entire island of São Miguel with its current population of >137,000 inhabitants. Most critically, the main harbor, only airport and hospital are located in the capital city of Ponta Delgada, ∼12 km SE from Sete Cidades caldera. In case of a future explosive eruption, under westerly blowing wind conditions, the impact on São Miguel could be catastrophic, with long-term economic consequences., Frontiers in Earth Science, 7, ISSN:2296-6463