Dimensionamento de revestimentos definitivos em túneis de adução

Tese de mestrado integrado. Engenharia Civil. Área de Especialização de Estruturas. Faculdade de Engenharia. Universidade do Porto. 201

Da influência francesa nas políticas públicas de segurança em Portugal

A realidade securitária em França tornou necessário revolucionar o paradigma político, que leva à génese e aplicação de políticas públicas específicas para o setor da segurança. Procuramos compreender a emergência das políticas públicas de segurança em França; verificar a sua influência em Portugal; averiguar da existência de diferenças entre o policiamento comunitário e o policiamento de proximidade, compreendendo-as; bem como apurar se as políticas públicas de segurança podem influenciar a filosofia do policiamento./ La réalité sécuritaire à France est devenue nécessaire de révolutionner le paradigme politique qui conduit à la genèse et la mise en oeuvre de politiques publiques spécifiques pour le secteur de la sécurité. Nous cherchons à comprendre l’émergence des politiques publiques de sécurité en France et vérifier son influence au Portugal; comprendre s’il y a des différences entre la police communautaire et la police de proximité; et enquêter si les politiques publiques de sécurité peuvent influer sur la philosophie de la police./ The securitarian reality in France brought about a necessary revolution of the political paradigm which led to both the genesis and application of public policies specifically for the security sector. We seek to understand the emergence of the public security policies in France and verify their influence in Portugal; to understand the differences between community policing and proximity policing (if any); and canvas wether the public security policies can influence the philosophy of policing

A New Species of Grigiotermes (Apicotermitinae, Termitidae) from the Northern Atlantic Forest, Delimited by Morphological and Molecular Data

In this paper, we described a new species of Grigiotermes, G. piassava sp. n., from the Brazilian Atlantic Forest. The imago and worker caste are described, including the gut morphology. The inclusion of the new species in Grigiotermes was based on morphological and DNA data. Apparently, the distribution of the species is limited to the northern region of the Atlantic Forest, located above the São Francisco River, which is considered one of the most threatened sectors of the biome

EXPERIMENTAL EMOTIONAL DISORDERS IN EPILEPSY AND THE IMPLICATION OF MUSCARINIC ACETYLCHOLINE RECEPTORS: A FORGOTTEN PUTATIVE THERAPEUTIC TARGET

Over the last decades it has been observed a major breakthrough in the development of new drugs in the treatment of emotional disorders. Despite this evolutionary framework, the neurobiological mechanisms involved in anxiety process are poorly understood and new approaches are still required, taking into account the resistance to therapies and therapeutic side-effects. Despite the clear involvement of muscarinic acetylcholine receptors (mAChR) in the modulation of synaptic transmission and its role in controlling experimental epileptogenesis and emotional outcomes, little attention has been paid to this neurotransmitter system and its feasible action in the treatment of pathological processes. In this sense, the present review aims to shed light on this important, but not deeply explored receptor system in the control of experimental epilepsy and anxiety, besides discussing its implementation in translational studies

Sentinel data for critical raw materials (CRM) exploration: First results of the S34I project

To achieve sustainable development goals, it is crucial to ensure the best practices through the whole mining cycle of critical raw materials (CRM) used in high-Tech, low-carbon goods (batteries, wind turbines, electronics). This is the aim of the SECURE AND SUSTAINABLE SUPPLY OF RAW MATERIALS FOR EU INDUSTRY (S34I) Horizon Europe (HE) project that began on January 1st, 2023. S34I is investigating new data-driven methods to analyze Earth Observation (EO) data, supporting systematic mineral exploration (and other) activities to increase European autonomy regarding CRM resources. The S34I project is based on satellite data, airborne, unmanned aerial vehicle (UAV), ground-based conventional in-situ techniques/methods, and fieldwork. This study presents the first preliminary results based on Sentinel-1 and Sentinel-2 data using classical image processing techniques (RGB combinations, band ratio, Principal Component Analysis PCA, and unsupervised classification) for mineral exploration in Spain, either: (i) on land (Aramo area), to gain knowledge on cobalt (Co) deposits (and associate CRMs) by hydrothermal alteration mapping; and (ii) offshore/shallow waters (Ria de Vigo area), to update the knowledge on coastal metallic placers including CRMs such as Ti, Sn, Li, rare earth elements (REEs) and Au. Among the techniques, PCA proved most effective, followed by band ratios, and selfproposed algorithms for detecting placer minerals showed promise, warranting further investigation. In the future, S34I will exploit Copernicus Contributing Missions (CCM) and other EU hyperspectral satellite sensors such as PRISMA and EnMAP. Different Artificial Intelligence (AI) techniques will, in the future, promote advances and innovative methods that mining stakeholders can use to address the challenges faced in different phases of the mining life-cycle. (c) 2023 SPIE. All rights reserved

I e II JORNADAS DO GRUPO PET-ETNODESENVOLVIMENTO E EDUCAÇÃO DIFERENCIADA DA UFRRJ

A Jornada do Grupo EtnoPET trata-se de um evento realizado anualmente pelo grupo PET Etnodesenvolvimento e Educação Diferenciada (EtnoPET), da Universidade Federal Rural do Rio de Janeiro. Dentre as propostas de trabalho desenvolvidas pelo grupo, a Jornada visa fomentar debates, divulgar e contribuir para implementar pesquisas acerca dos Povos e Comunidades Tradicionais, além de trazer saberes e reflexões de conhecimento popular para o meio acadêmico. Por se tratar de um evento que acontece anualmente, a Jornada EtnoPET tem a característica de ser temática, ou seja, de acordo com os debates em voga no grupo e as atividades trabalhadas ao longo do ano seleciona-se um eixo temático para ser desenvolvido e trabalhado com mais afinco durante o evento. Para melhor elucidação do projeto, serão abordadas no texto as experiências adquiridas através das I e II Jornadas do Grupo EtnoPET realizadas entre os anos 2018 e 2019

I e II JORNADAS DO GRUPO PET-ETNODESENVOLVIMENTO E EDUCAÇÃO DIFERENCIADA DA UFRRJ

A Jornada do Grupo EtnoPET trata-se de um evento realizado anualmente pelo grupo PET Etnodesenvolvimento e Educação Diferenciada (EtnoPET), da Universidade Federal Rural do Rio de Janeiro. Dentre as propostas de trabalho desenvolvidas pelo grupo, a Jornada visa fomentar debates, divulgar e contribuir para implementar pesquisas acerca dos Povos e Comunidades Tradicionais, além de trazer saberes e reflexões de conhecimento popular para o meio acadêmico. Por se tratar de um evento que acontece anualmente, a Jornada EtnoPET tem a característica de ser temática, ou seja, de acordo com os debates em voga no grupo e as atividades trabalhadas ao longo do ano seleciona-se um eixo temático para ser desenvolvido e trabalhado com mais afinco durante o evento. Para melhor elucidação do projeto, serão abordadas no texto as experiências adquiridas através das I e II Jornadas do Grupo EtnoPET realizadas entre os anos 2018 e 2019

Yttria/ceria stabilized zirconia composites: evaluation of microstructural, mechanical and color properties for biomedical applications

[Excerpt] 3-mol% Yttria-Stabilized Tetragonal Zirconia Polycrystal (3Y-TZP), a ceramic biomaterial, has been widely used in the dentistry field due to its biocompatibility, tooth-like color and mechanical properties [1]. Despite these advantages, its physical and mechanical properties tend to degrade as a result of a low-temperature aging process induced by its sensitivity to low-temperature degradation (LTD) when it is in contact with water that is already at human body temperature [2]. Because of this, many studies have been performed aiming at avoiding this phenomenon by replacing 3Y-TZP by 12 mol% ceria stabilized tetragonal zirconia polycrystal (12Ce-TZP). Nevertheless, compared to 3Y-TZP, 12Ce-TZP has lower strength which is partly related to its larger grain size [3]. [...]This work was supported by FCT national funds, under the national support to R&D units grant, through the reference project UIDB/04436/2020 and UIDP/04436/2020. Additionally, this work was also supported by FCT through the grant SFRH/BD/146324/2019

Caracterização estrutural da lignina da parede celular de Euterpe oleracea

This paper aimed to characterize the lignin in the cell wall of Euterpe oleracea Mart. Samples from two regions of the base of the palm were acquired: outer and inner regions (OR and IR, respectively). The extraction with organic solvents and the treatment with 1% NaOH were carried out. Holocellulose, α-cellulose and lignin content were quantified, the latter also isolated by the Björkman method for the structural characterization using 1H and 13C NMR in the liquid state, as well as spectroscopic (FTIR) and chromatographic analysis. The extracted stem had 10.33% (OR) and 15.66% (IR) of the lignin. After the treatment with 1% NaOH, a reduction in these values was observed, and it was also possible to confirm this result through the decrease in the intensities of the signals referring to the functional groups linked to lignin and hemicellulose. The spectroscopic and chromatographic analyzes revealed GS-type lignin incorporated with p-hydroxybenzoic and protocatechuic acid in both samples. The main structural units present in the lignin were also observed, such as β-O-4 bond, β-O-4’ ϒ-acetyl bond, guaiacyl unit, syringyl unit and p-hydroxybenzoate.Este trabalho teve como objetivo caracterizar a lignina na parede celular de Euterpe oleracea Mart. Foram adquiridas amostras de duas regiões da base da palmeira: região externa e região interna (OR e IR, respectivamente). A extração com solventes orgânicos e o tratamento com NaOH 1% foram realizados. O conteúdo de holocelulose, α-celulose e lignina foi quantificado, esta última também isolada pelo método de Björkman para a caracterização estrutural utilizando RMN de 1H e 13C no estado líquido, assim como análises espectroscópicas (FTIR) e cromatográficas. O caule extraído apresentou 10,33% (OR) e 15,66% (IR) de lignina. Após tratamento com NaOH 1%, observou-se uma redução desses valores, e foi possível confirmar esse resultado também através da diminuição nas intensidades dos sinais referentes aos grupos funcionais ligados à lignina e hemicelulose. As análises espectroscópicas e cromatográficas revelaram lignina do tipo GS incorporada com ácido p-hidroxibenzoico e protocatecuico em ambas as amostras. Também foram observadas as principais unidades estruturais presentes na lignina como ligação β-O-4, β-O-4’ ϒ-acetiladas, spiro-dienona, unidade guaiacila, unidade siringila e p-hidroxibenzoato