Redes neurais para predição de variáveis climáticas relevantes para a agricultura1.

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Core Components for Infection Prevention and Control Programs: A World Health Organization Network Report

Under the leadership of the World Health Organization (WHO), the core components necessary for national and local infection prevention and control programs are identified. These components were determined by a network of international experts who are representatives from WHO regional offices and relevant WHO programs. The respective roles of the national authorities and the local healthcare facilities are delineate

Avaliação de genótipos de mandioca da reserva extrativista Cazumbá-Iracema, Acre.

A mandioca é o principal produto agrícola do Acre, cultivado para geração de renda e segurança alimentar, sendo tipicamente de exploração familiar. Este trabalho teve como objetivo avaliar genótipos de mandioca na Reserva Extrativista do Cazumbá-Iracema, localizada no município de Sena Madureira, AC. Foram instalados três experimentos nas localidades Cazumbá, Cuidado e Alto Caeté, utilizando-se o delineamento inteiramente casualizado com quatro repetições. Foram avaliados; número de raízes por planta, percentagem de amido e massa seca de raízes, produtividade e rendimento de farinha de mandioca. Foi realizada a avaliação de oito genótipos nas localidades de Cazumbá e Cuidado e de seis genótipos em Alto Caeté, analisando conjuntamente os quatro genótipos Panatí, Araçá, Colonial e Pirarucu que foram plantados nas três localidades. Os dados foram submetidos a análise de variância e para os efeitos significativos, aplicou-se o teste de Tukey e Scott-Knott a 5 % de probabilidade. A cultivar Pirarucu, que é a mais plantada na reserva, foi ogenótipo que apresentou melhor desempenho quanto a produtividade e rendimento de farinha

Performance assessment of micropollutants removal from water using advanced oxidation processes

In a global climate change scenario, reliable access to clean and safe water for all remains a great worldwide challenge for the twenty first century, as one of the most ambitious targets of several Sustainable Development Goals (SDG) established in the UN Agenda 2030. The increasing presence in the urban aquatic ecosystems of priority pollutants and contaminants of emerging concerning (CECs) have brought new challenges to the existing water treatment systems (WTS) concerning with public health protection and the of drinking water sources preservation. Advanced oxidation processes (AOPs) have been widely studied because of their potential as a complementary or alternative process to conventional wastewater treatment. Several AOPs using nanomaterials as photocatalyst can be particularly effective in the degradation of many toxic micropollutants, and enhance the multifunctionality, versatility and sustainability of WTS. This work presents a synthesis of the major results obtained in several pilot and lab-scale studies aiming to assess the performance of different low-cost catalytic processes used for antibiotic and pesticide removal. For each photo-oxidation reactors, different test scenarios are defined in order to evaluate the effects of several abiotic and hydraulic parameters on process kinetics and removal efficiencies. The experimental results were very promising, because antibiotic removal efficiencies achieved the maximum value of 96% for the photo-oxidation by water columns with suspended TiO2 nanoparticles, and 98% for the photocatalytic filtration performed by a porous medium coated with TiO2. In the photoelectrocatalytic reactor, the atrazine concentration has been fully removed for reaction times between 35 and 95 minutes.(undefined

HEAT EXCHANGER NETWORK SYNTHESIS CONSIDERING CHANGING PHASE STREAMS

The Pinch Design Method was developed considering one-phase streams, with constant specific heats (Cp) throughout streams temperature ranges. Its first stage, the determination of utilities targets and pinch point (PP), is ruled by the number of streams, their temperatures and MCp. But, for changing phase streams, the usual description of the Cp behavior by a constant value can lead to errors in this stage and, hence, in the synthesis one. This work proposes a procedure to deal with these streams and discusses its results through an example involving multicomponent streams. First, bubble (BP) and dew (DP) points of the streams are estimated. Then, changing phase streams are split into sub-streams, using BP and DP as bounds. For each one, an effective Cp is estimated as the division of the enthalpy change by the respective temperature difference. Results obtained show significant changes on the PP, utilities targets and network proposed structure