Ana Cristina Da Silveira de Moura

La identidad de una ciudad, que se vive en la vida intergeneracional y cotidiana de sus habitantes, depende del patrimonio histórico e inmaterial que sustenta las tradiciones familiares y comunitarias. La escritura creativa colaborativa, en particular la basada en la ficción especulativa del subgénero de la Historia Alternativa es un medio que permite recuperar los cimientos de la identidad, el patrimonio y las tradiciones de una ciudad, reinterpretarlos e integrar a individuos y comunidades por igual en la experiencia cultural inmaterial que es social, patrimonial y ambientalmente sostenible. A través de un análisis comparativo de da-tos originales recopilados durante la exploración de las contribuciones de la escritura colaborativa en un espacio museístico, proponemos una primera aproximación a nuevas estrategias para la recuperación, preservación y difusión del patrimonio histórico y cultural inmaterial de la ciudad.

Per- and poly-fluoroalkyl substances (PFAS) have emerged as 'forever-chemicals' due to their persistence in the environment, raising concerns about their widespread commercial and industrial use. To address this challenge, machine learning (ML) models were developed to tap into unexplored data collected from the ECOTOX database. Both linear and nonlinear ML models were set-up using unique curation tools and the Box-Jenkins moving average-based multi-target approach. Our best predictive ML models not only had an overall predictive accuracy higher than 90%, but also allowed for mechanistic insights vis-à-vis the key structural features linked to PFAS toxicity under various experimental conditions. Specifically, a proper balance between high lipophilicity, low molecular weight and fewer electronegative elements is likely to elicit high aquatic PFAS toxicity. These findings hold potential for guiding the design of new PFAS with a reduced environmental footprint, fostering a more sustainable approach to chemical development.

A Revolução portuguesa de 25 de Abril de 1974, comumente conhecida como Revolução dos Cravos, costuma popularmente ser designada ‘revolução sem sangue’. Enquadrada na reorganização da memória coletiva enquanto memória forte (Caudan, 2011), este trabalho explora o desenvolvimento, produção, estreia e recepção do filme Revolução (sem) Sangue, como a linguagem fílmica pode ser um fator ponderado na relação entre cinema, memória coletiva, e história pública. Estreado duas semanas antes do cinquentenário da Revolução do 25 de Abril, a narrativa cinemática encena a vida de quatro das pessoas que morreram nesse dia num confronto entre populares e a polícia política, tornando-se um caso de estudo entre o cinema e o reconhecimento institucional de aspetos menos presentes nas dinâmicas de memória. Incluindo, numa abordagem de índole empírica, dados de uma grande variedade de fontes primárias, propõe-se nas conclusões que os parâmetros de surpresa narrativa, conexão emocional, e ‘âncoras’ (pessoais e institucionais) de impacto individual e social são componentes da linguagem do cinema com efeito causal nestas dinâmicas.

At the core of the development of more efficient and reliable fuel cells (FCs), there are several essential chemical reactions, namely carbon monoxide (CO) oxidation. This reaction is a keystone in the cleaning of hydrogen fuel used in fuel cells due to strong poisoning by this species of the platinum catalyst used in these devices. The present work aims to provide insight regarding the activation of CO oxidation by gold or silver microfacets possessing low coordinated atoms. To achieve this, density functional theory (DFT) quantum calculations, which determined two competing reaction pathways for CO oxidation, i.e., by molecularly adsorbed oxygen, and by dissociated oxygen, are combined with first-principles kinetic Monte Carlo (1p-kMC) simulations, which employed the resulting DFT parameters in order to address the effect of temperature and partial pressures and the interplay of the elementary reaction events. The use of 1p-kMC is a step further from available works regarding the CO oxidation on gold- and silver-based catalysts for cleansing of hydrogen that is used as a fuel in FCs. Indeed, this research contributes to the conclusion that CO oxidation should preferentially occur on silver microfacets, while the obtained turnover frequencies (TOFs) reinforced such a conclusion.

Higher Education Student burnout is an increasingly educational and social concern. The problem is complex and multilayered, demanding new approaches in predicting hazardous situations that can lead to the demise of the mental and physical well-being of the students. This work proposes a new model that can be used to predict and prevent such educational and/or social scenarios, resourcing to new tools, as the Reductio ad dystopia and speculative data. It departs from recent social quantum-based models and selected speculative literature works while introducing the use of social network theory to add the time variable to the model. The results clearly indicate that speculative and real scenarios can be juxtaposed in such a model, and concludes that a time interval for predicting the occurrence of the problem can be one of its advantages.

Bioactive peptides participate in numerous metabolic functions of living organisms and have emerged as potential therapeutics on a diverse range of diseases. Albeit peptide design does not go witho...

Massive Open Online Courses (MOOCs) have experienced in recent years a significant growth in courses'offer and the number of enrolled students. Nevertheless, the controversy regarding if its quality is reliable, namely in student evaluation and assessment, has not found closure. In this study, we aim at establishing an initial prospection of the academic teaching professionals' perspective regarding the quality of the most common/usual evaluation methods and tools used in MOOCs. After the elaboration of a questionnaire and its implementation to an international sample of academic professors, the analysis of the answers allows perceiving which MOOC grading methods are acceptable in presential Higher Education courses and its eventual acceptable weight in the final grade. Further, within certain constraints, a large percentage of the inquired academics presented no problem with the inclusion of MOOC grading methods on their non-online courses. Overall, within those constraints, the academics felt the quality of the academic orthodox courses was maintained, a perspective that can contribute to change eventual suspicious attitudes regarding MOOCs evaluation methodologies and their student assessment.