Escola pública como «arena» política: Contexto e ambivalências da socialização política escolar

Este artigo é uma reflexão preliminar em torno de um projecto de investigação em curso, o qual incide na temática da socialização política na escola secundária em Portugal. O texto propõe-se contextualizar a socialização política escolar em função da experiência escolar moderna, do modelo institucional de escola, do papel da crítica e das reformas educativas. Prossegue com o questionamento dos recentes dispositivos criados para a introdução da «educação para a cidadania» no currículo formal. Termina com a problematização do lugar da «educação para a cidadania» no contexto das ambivalencias que marcam a experiência estudantil actual. Cet article est une réflexion préliminaire à propos d'un projet de recherche en cours qui met l'accent sur la thématique de la socialisation politique dans l'école secondaire portugaise. Le texte se propose de contextualiser la socialisation politique scolaire en fonction de l'expérience scolaire moderne, du modèle institutionnel d'école, du rôle de la critique et des réformes éducatives. S'ensuit une mise en question des récents dispositifs créés en vue d'introduire l' «éducation pour la citoyenneté» dans le programme formel. Et il se termine en posant le problème de la place de l' «éducation pour la citoyenneté» dans le contexte des ambivalences qui marquent l'expérience des étudiants de nos jours. This article is part of a current research project on the topic of political socialization in secondary schools in Portugal. Our aim is to describe the background to political socialization at school in the light of the school experience today, the school as institution, and the role of educational critiques and reforms. The article goes on to question recent mechanisms designed to put «education for citizenship» on the formal curriculum. It concludes by questioning the place of «education for citizenship» in the ambivalent context of student life today

Electrochemical treatment of effluent for the removal of contaminants of emergent concern and culturable microorganisms

project CEMOWAS2 (SOE2/P5/F0505) UIDB/04085/2020 CEECIND/04210/2017The present work aims to study the electrochemical (EC) process applied for the removal of contaminants of emergent concern (CECs) from wastewater after secondary treatment and the effect of the process on the total culturable microorganisms. The EC experiments were performed in a cylindrical open reactor with 500 mL of effluent, and a fixed current density of 8 mA/cm² was applied through mixed metal oxide electrodes. The experiments were conducted in different sets. In the first round (Set 1), the effluent sample was spiked with three CECs (200 ppb each): Caffeine (CAF), carbamazepine (CBZ), and oxybenzone (OXY). For the best treatment period, 6 h, electrodegradation rates ranged from 41 ± 7% for CAF to 95 ± 6% for OXY, with an 87% removal of total culturable microorganisms. In the second round (Set 2), aiming to assess EC process efficiency in a more complex CEC mixture, the effluent was spiked with six more CECs (200 ppb each): Diclofenac (DCF), triclosan (TCS), bisphenol A (BPA), 17β-estradiol (E2), 17α-ethinylestradiol (EE2), and ibuprofen (IBU), giving a total of nine CECs. In this case, the EC process allowed decreasing the CEC content by 19-100% (below the limit of detection), depending on the effluent samples, and the culturable microorganisms by 99.98% after a 6 h treatment. By contributing to CEC degradation and microorganism removal, the EC process proved to be a viable remediation and disinfection technology for secondary effluent from wastewater treatment plants.publishersversionpublishe

Efficient dynamic modeling of reflective semiconductor optical amplifier

“Copyright © [2013] IEEE. Reprinted from IEEE Journal of Selected Topics in Quantum Electronics. ISSN: 1932-4553. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”RSOA is considered a strong candidate to play an important role in realizing the next generation WDM PON, based on the wavelength reuse concept. Therefore, accurate and efficient modeling of RSOA is of significant importance. We present a time-domain wideband model for simulation of spatial and temporal distribution of photons and carriers in a bulk RSOA. A trade-off between the accuracy and the computational efficiency of the model is studied. Multi-objective genetic algorithm is utilized for parameter extraction. Experimental validation has been performed for continuous wave input, NRZ and QPSK signaling pulses up to 40 Gb/s of bit rate, in both amplification and remodulation regimes. Saturation, noise, chirp and signal broadening are successfully predicted, while reducing the computational time compared to other wideband models

All-optical XOR based on integrated MZI-SOA with Co and counter-propagation scheme

“Copyright © [2009] IEEE. Reprinted from ICTON-MW 3rd. ISBN:978-1-4244-5745-8. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”In this work we present a review of all-optical XOR gates based on Mach-Zehnder Interferometer with Semiconductor Optical Amplifiers (MZI-SOA), using NRZ modulated signals driven at 10 Gbit/s. The performance of two alternative schemes for logical XOR gates implementation is demonstrated through numerical simulations and experimentally. The extinction ratio shows high operation performance with low degradation

Proposta de Sistema de Gestão da Qualidade: Laboratório de Saúde Pública da Guarda

O presente projeto aplicado tem como objetivo propor um Sistema de Gestão da Qualidade, segundo a Norma NP EN ISO 9001:2015, para o Laboratório de Saúde Pública da Guarda (LSPG) da Unidade Local de Saúde da Guarda, E.P.E. (ULSG). O LSPG desenvolve a sua atividade no âmbito da avaliação da qualidade das águas, alimentos e produtos agroalimentares, de acordo com as exigências da legislação nacional e comunitária, com as recomendações da Organização Mundial de Saúde (OMS) e as expectativas e necessidades dos seus clientes, de forma a dar cumprimento não só aos requisitos normativos, mas também aos requisitos regulamentares aplicáveis. O planeamento de um Sistema de Gestão da Qualidade (SGQ) melhora o desempenho do laboratório, aumenta o grau de satisfação de todas as partes interessadas, gera maior economia, eficácia e eficiência dos processos e contribui para que o LSPG utilize a qualidade dos seus serviços como uma vantagem competitiva. Para tal, deve estabelecer-se a política e os objetivos da qualidade para promover uma estratégia de sustentabilidade através do conceito de melhoria contínua. Para a realização do projeto aplicado, a metodologia de investigação seguida para a análise teórica foi a revisão de literatura científica e dos normativos legais para contextualizar a temática da qualidade, em geral, e do SGQ em particular, com ênfase na Norma NP EN ISO 9001:2015, abordando também a Norma NP EN ISO/IEC 17025, no âmbito da acreditação de laboratórios. Para a concretização da análise empírica, recorreu-se ao método do caso de estudo, por aplicação da Norma ISO 9001:2015 no LSPG. Os resultados evidenciam a fase de planeamento do SGQ no LSPG, suportado na Norma NP EN ISO 9001:2015, onde se adota o processo de melhoria contínua e fomenta a deteção de não conformidades e oportunidades de melhoria que garantam a participação das partes interessadas e a participação ativa da gestão de topo da organização (ULSG)

Right Atrial Thrombus: a Rare Presentation of Plasminogen Activator Inhibitor Deficiency

A presença de trombos móveis na aurícula direita são fenómenos raros, mas associados a uma elevada mortalidade. Apesar de a ecocardiografia ter permitido avanços no seu diagnóstico, a sua abordagem continua a ser motivo de debate. Neste artigo apresentamos o caso de uma doente do sexo feminino, de 24 anos, com antecedentes de tabagismo, obesidade e sob terapêutica anovulatória que recorre ao serviço de urgência por cansaço fácil e tosse com expetoração hemoptoica. O ecocardiograma transtorácico revelou massa, móvel, multilobulada de grandes dimensões na aurícula direita, condicionando abertura da válvula tricúspide. Perante episódios recorrentes de embolia pulmonar, foi submetida a cirurgia cardíaca com exérese da massa, sendo o resultado anatomopatológico compatível com trombo organizado com calcificação. O estudo genético revelou homozigotia para a variante alélica PAI-1:-675G >A(4G/4G) do inibidor do ativador do plasminogénio e heterozigotia para a variante alélica MTHFR 1298 A/C da 5,10-metilenotetrahidrofolato redutase

Production of Oligosaccharides from Pine Nut Shells by Autohydrolysis

ABSTRACT: Pinus pinea nuts are commercial relevant Mediterranean edible forest nuts, with an increasing production and market value, whose industrial processing yields a lignocellulosic by-product, the pine nut shells, currently only used for combustion. Little research has been done on pine nut shells that could support a value-added application for this residue. This work studies for the first time the production of oligosaccharides by autohydrosis, and aims at an integrated upgrade within the biorefinery framework. Autohydrolysis was explored in the temperature range between 150 and 230 degrees C (corresponding to severity factors 2.13-4.63). Oligosaccharides, mainly xylo-oligosaccharides (95% of the total), were the key soluble products, reaching 28.7 g/100 g of xylan of the feedstock at the optimal conditions (log R-0 4.01). Other products were monosaccharides and phenolic compounds that reached 7.8 and 4.7 g/L, respectively, under the most severe conditions. The stability of the oligosaccharides at different temperatures (room, 37 degrees C and 100 degrees C) and pH (between 1 and 11) grant them significant market potential in the food and pharma sectors. The pre-treated pine nut shells by autohydrolysis presented an improved, although low, enzymatic digestibility (14%), and an improved high-heating value, therefore advising their further valorization by thermochemical pathways.info:eu-repo/semantics/publishedVersio

Enhanced optical gain clamping for upstream packet based traffic on hybrid WDM/TDM-PON using fiber bragg grating

In this paper, we propose a method to mitigate the temporal power transients arising from Erbium doped fiber amplifiers (EDFAs) on packeted/bursty scenario. The technique, applicable on hybrid WDM/TDM-PON for extended reach, is based on a low power clamping provided by a distributed feedback (DFB) laser and a fiber Bragg grating (FBG). An mprovement in the data signal Q factor was achieved keeping the clamping control signal with a low power, accompanied by a maximum reduction in the gain excursion of 1.12 d