AS CONTRIBUIÇÕES DA CATEGORIA DA TOTALIDADE PARA A ANÁLISE DOS MOVIMENTOS SOCIAIS

Resumo: Karl Marx foi o primeiro pensador a expressar a totalidade de forma dialética, ou seja, a partir das múltiplas determinações que é o concreto. A categoria da totalidade é a categoria fundamental no interior do método dialético, sendo o fio condutor para pensar os fenômenos sociais de forma ampla e que expressa a realidade. O presente artigo propõe discutir a questão da categoria da totalidade e sua possível contribuição analítica para as pesquisas que versam sobre os movimentos sociais, a partir dos escritos metodológicos de Marx e alguns de seus continuadores (Korsch, Lukács, Nildo Viana, etc.)

Técnicas para emulação de saltos indiretos em máquinas virtuais

Orientador: Edson BorinDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de ComputaçãoResumo: Tradução dinâmica de binários é uma técnica de emulação comumente utilizada na implementação de máquinas virtuais. Neste contexto, a emulação de saltos indiretos é uma das principais fontes de perda de eficiência, o que atrapalha a aplicabilidade de tradutores dinâmicos de binários. Essa dissertação descreve diversas técnicas que tentam melhorar o desempenho e a eficiência da emulação de saltos indiretos em máquinas virtuais eficientes. O DynamoRIO é uma máquina virtual que se enquadra nessa categoria e que utiliza características de diversas dessas técnicas. Nessa dissertação, nós apresentamos a implementação atual do DynamoRIO, modificamos seu código para incluir duas novas técnicas de emulação de saltos indiretos (Inline Caching e IBTC) e as comparamos com outras técnicas descritas na literaturaAbstract: Dynamic binary translation is an emulation technique commonly employed in the implementation of virtual machines. One of the main sources of overhead that hinder the applicability of dynamic binary translators is that caused by the emulation of indirect branch instructions. This master thesis describes several techniques that try to improve the performance and efficiency of indirect branch emulation in efficient virtual machines. DynamoRIO is one of such machines and it implements features used by several of those techniques. In this master thesis, we present current implementations of DynamoRIO, modify its code to include two new techniques (Inline Caching and IBTC) and compare it with other techniques described in the literatureMestradoCiência da ComputaçãoMestre em Ciência da Computaçã

Desenvolvimento de uma metodologia analítica de monitorização de pesticidas em meios hídricos

Mestrado de dupla diplomação com o Centro Federal de Educação Tecnológica de Minas GeraisO trabalho realizado tem o objetivo de desenvolver uma metodologia analítica para a monitorização de micropoluentes em meios hídricos. Foi selecionado para estudo um grupo de 11 pesticidas tendo por base aqueles mais utilizados na região nordeste de Portugal e no Brasil. Esta metodologia baseia-se numa etapa de extração em fase sólida (SPE) seguida de quantificação por cromatografia gasosa em fase acoplada com espetrometria de massas (GC-MS). Na otimização da etapa de extração utilizam-se cartuchos com adsorvente de poli(divinilbenzeno-co-N-vinilpirrolidona (Chromabond HLB). Optou-se por desenvolver os estudos de SPE utilizando um grupo de pesticidas solúveis em metanol e outro grupo solúvel em hexano. A metodologia de extração proposta obteve recuperações superiores a 78% para uma mistura composta pelos pesticidas dimetoato, terbutilazina e heptacloro. Na identificação e quantificação por GC-MS, os limites de deteção e de quantificação foram estimados através das curvas de calibração obtidas por análise sem extração de soluções padrão de dimetoato, terbutilazina e heptacloro. Os limites de deteção obtidos, são de 0,003 mg/L para o heptacloro, 0,066 mg/L para a terbutilazina e 1,98 mg/L para o dimetoato. Devido à pouca exatidão dos resultados, decidiu-se a utilização do método do padrão interno para melhores resultados. Devido à situação de pandemia e à obrigatoriedade de confinamento imposta pelo governo português, foi possível estudar apenas as condições operatórias de análise utilizando padrões analíticos e sem utilizar a etapa inicial de extração por SPE. Estava prevista a validação do método utilizando amostras recolhidas de 3 rios de Bragança, rio Fervença, Sabor e Onor, contudo, esta não foi realizada.The work has the objective of developing an analytical methodology for the monitoring of micropollutants in water environments. A group of 11 pesticides was selected for study based on those most used in the northeast region of Portugal and in Brazil. This methodology is based on a solid phase extraction (SPE) followed by quantification by gas chromatography coupled with mass spectrometry (GC-MS). In the optimization of the extraction step, cartridges with poly (divinylbenzene-co-N-vinylpyrrolidone adsorbent (Chromabond HLB) adsorbent are used. It was decided to develop the SPE studies using a group of pesticides soluble in methanol and another group soluble in hexane. The proposed extraction methodology obtained recoveries greater than 78% for a mixture composed of the pesticides dimetoate, terbuthylazine and heptachlor. In the identification and quantification by GC-MS, the limits of detection and quantification were estimated through the calibration curves obtained by analysis without extraction of standard solutions of dimethoate, terbuthylazine and heptachlor. The detection limits obtained are 0,003 mg/L for heptachlor, 0,066 mg/L for terbuthylazine and 1,98 mg/L for dimetoate. Due to the low accuracy of the results, it was decided to use the internal standard method for better results. Due to the pandemic situation and the mandatory confinement imposed by the Portuguese government, it was possible to study only the operational conditions of analysis using analytical standards and without using the initial stage of extraction by SPE. The validation of the method was foreseen using samples collected from 3 rivers of Bragança, river Fervença, Sabor and Onor, however, this was not carried out

Species turnover across different life stages from seedlings to canopy trees in swamp forests of Central Brazil

Processes driving the assembly of swamp forest communities have been poorly explored. We analyzed natural regeneration and adult tree communities data of a swamp gallery forest in Central Brazil to discuss the role of ecological filters in shaping plant species turnover in a successional gradient. Species data of 120 plots were used to assess species turnover between natural regeneration and adult tree communities. Our analyses were based on 4995 individuals belonging to 72 species. Community patterns were discerned using ordination analyses. A clear floristic turnover among plant life stages was distinguished. Regeneration community of swamp forests was richer in species composition than the adult community. Tree species commonly found in nonflooded gallery forests were present in the regeneration plots but not in the adult community. Differences in the floristic composition of these two strata suggest that not all species in the seedling stage can stand permanent flooding conditions and only a few tolerant species survive to become adult trees. We propose that natural disturbances play an important role by altering limiting resources, allowing seeds of nonflooded forest species to germinate. This paper elucidates the turnover between plant life stages in swamp forests and suggests mechanisms that may shape these communities

AS DIFICULDADES ENCONTRADAS POR GESTORES DE RECURSOS HUMANOS NA CAPTAÇÃO E SELEÇÃO DE PESSOAS COM DEFICIÊNCIA – PcD´s

O objetivo geral deste artigo é apresentar as principais dificuldades dos gestores de recursos humanos, durante o processo de captação e seleção de pessoas com deficiência – PcD´s. O ponto de partida foi o levantamento bibliográfico das etapas da captação e seleção; Inclusão de pessoas com deficiência no mercado de trabalho; e a Lei de Cotas. Foi realizada, ainda, uma pesquisa descritiva explicativa, seguindo uma abordagem quantitativa, com aplicação de um questionário estruturado em cinco empresas de médio e grande porte do Distrito Federal e Entorno Sul. Os resultados indicam que o processo de captação de pessoas com deficiência é bem mais lento que o processo seletivo tradicional. Ainda com base nos estudos, é possível perceber que a maioria de vagas destinadas aos PcD´s são vagas para cargos operacionais. Conclui-se, que as maiores dificuldades dos gestores compreendem justamente em atender a legislação estabelecida pela Lei de Cotas, seguidas da falta de mão de obra qualificada para preencher as vagas, que mesmo embora, sejam operacionais, apresentam grande dificuldade para preenchê-las, tornando sempre esse um desafio constante para o gestor de recursos humanos. DOI: https://doi.org/10.6084/m9.figshare.682880

A Big Data system architecture to support the monitoring of paved roads

Today, everything is connected, including the exchange of data and the generation of new information. As a result, large amounts of data are being collected at an ever-increasing rate and in a variety of forms, a phenomenon now known as Big Data. Recent developments in information and communication technologies are driving the generation of significant amounts of data from multiple sources, namely sensors. In response to these technological advances and data challenges, this paper proposes a Big Data system architecture for paved road monitoring and implements part of this architecture on a section of road in Portugal as a case study. The challenge in the case study architecture is to collect and process sensor data in real time, at a rate of 500 records per second, producing 15 GBytes of data per day, using a real-time data stream for real-time monitoring and a batch data stream for deeper analysis. This allows users to obtain instant updates on road conditions such as the number of vehicles, loads, weather, and pavement temperatures on the road. They can monitor what is happening on the road in real time, receive alerts, and even gain insight into historical data, such as analysing the condition of structures or identifying traffic patterns.This work was also partly financed by FCT/MCTES through national funds (PIDDAC) under the R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE), under reference UIDB/04029/2020, and under the Associate Laboratory Advanced Production and Intelligent Systems ARISE, under reference LA/P/0112/2020. This work was also partly supported by the FCT under the R&D Units Project Scope: UIDB/00319/2020

Evaluation of lactobacillus paracasei LP11 and lactobacillus rhamnosus 64 potential as candidates for use as probiotics in functional foods

Desirable characteristics for probiotic microorganisms were evaluated in Lactobacillus rhamnosus 64 and Lactobacillus paracasei LP11. Both strains were tested for resistance to lysozyme and simulated gastrointestinal fluids, determination of cell wall hydrophobicity, evaluation of antibiotic susceptibility, antagonist activity against pathogens and the ability to use prebiotics. The safety determination was performed by an in vivo test, where the occurrence of bacterial translocation to liver was evaluated after daily oral administration of the strains for 10 days to mice. All results were promising, with the exception of resistance to simulated gastrointestinal fluids, that was unsatisfactory, with a decrease in viable cell concentrations of up to 5.08 log CFU/mL. The hydrophobicity profile of the strains ranged between 8.47 and 19.19%. Both showed satisfactiry resistance to lysozyme, with survival rates above 80%, strains were able to antagonize Escherichia coli V517, Salmonella enteritidis OMS-Ca, Staphylococcus aureus 76 and Listeria monocytogenes ATCC 15313, and displayed satisfactory use of lactulose, inulin and P95 raftilose as prebiotics. No bacterial translocation was observed after the administration of the strains to mice. The results obtained herein justify the use of L. rhamnosus 64 and L. paracasei LP11 in new investigations for the future application of these microorganisms as probiotics.Fil: de Matos, Fernando Eustáquio. Universidade de Sao Paulo; Brasil. Universidade Federal de Juiz de Fora; BrasilFil: Santos, Tizá Teles. Universidade Estadual de Santa Cruz; BrasilFil: Burns, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Lactología Industrial. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Lactología Industrial; ArgentinaFil: Reinheimer, Jorge Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Lactología Industrial. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Lactología Industrial; ArgentinaFil: Vinderola, Celso Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Lactología Industrial. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Lactología Industrial; ArgentinaFil: Trindade, Carmen Sílvia Fávaro. Universidade de Sao Paulo; Brasi

Understanding the Influence of the Biomass-Derived Alcohols on the Activity and Stability of Pt Nanoparticles Supported on Graphene Nanoribbons

We produced Pt/GNRs by a one-step synthesis procedure and evaluated their electroactivity and stability towards glycerol electrooxidation reaction (GEOR) for the first time. We compared the electrocatalytic performance of GEOR with methanol and ethanol electrooxidation on Pt/GNRs at identical experimental conditions. The activities and stabilities for the electrooxidation of these biomass-derived alcohols on Pt/GNRs were compared to commercial Pt/C. The synthesis of the Pt/GNRs was confirmed by transmission electron microscopy, x-ray diffractometry, ultraviolet spectrophotometry, and Raman spectroscopy. We found that the activities of Pt/GNRs for these reactions are comparable to Pt/C, with improvement in terms of current density for methanol electrooxidation. Comparing potentiostatic measurements, we found that glycerol produces lower pseudo-stationary current densities than ethanol and methanol on both catalysts, with greatest values found for methanol electrooxidation on Pt/C. Otherwise, the GNRs remarkably enhance the stability of the catalyst for all the reactions, by increasing the stability of the current density during successive potential cycles, and by preventing the loss of electrochemically active surface area by avoiding carbon corrosion and Pt detachment. Moreover, we showed that the stability of the NPs depends on the biomass-derived alcohol used. The solution containing methanol reveals itself the most aggressive electrochemical environment to the catalyst, impacting in the decrease of surface area, while glycerol is less aggressive. Hence, the different products formed at the interface electrode/solution might lead to a different electrochemical environment, which plays an important role on the stability of the catalysts.The authors acknowledge financial assistance from CNPq (grant no. 454516/2014-2), FUNDECT (grant no. 026/2015), FAPESP (grant no. 2016/01365-0), CAPES, FINEP, and FAPESP.Peer reviewe

Achieving biodiversity protection in megadiverse countries: a comparative assessment of Australia and Brazil

- Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à Lei de Direitos Autorais, não disponibilizamos a obra na íntegra.- Localização na estante: 34:504(81+292.91/.93) A178