Browsing by Issue Date, starting with "2022-05"
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- Escolas que fazem a diferençaPublication . Palmeirão, Cristina; Alves, José MatiasA escolaridade de sucesso é a que resulta de processos dialógicos, de relações pedagógicas positivas e interativas, onde professores e alunos assumem o paradigma das escolas que fazem a diferença - nos modos de ensinar, de fazer aprender, saber e saber ser. Nesse desafio, as escolas (agrupadas e não agrupadas), em particular as TEIP (Territórios Educativos de Intervenção Prioritária), vêm repensando as suas ações e estratégias de ensino e de aprendizagem, promovendo processos de inovação e de mudança educacional para, continuamente, promoverem o sucesso educativo, implicando de forma efetiva os alunos na construção do seu projeto educativo e, concomitantemente, no desenvolvimento do seu território e das suas comunidades.
- 10 desafios para a ação educativa: notas para um fecho de seminário e abertura de horizontePublication . Alves, José Matias
- Introdução: escolas que fazem diferençaPublication . Palmeirão, Cristina; Alves, José Matias
- Can deep reinforcement learning improve inventory management? Performance on lost sales, dual-sourcing, and multi-echelon problemsPublication . Gijsbrechts, Joren; Boute, Robert N.; Mieghem, Jan A. van; Zhang, Dennis J.Problem definition: Is deep reinforcement learning (DRL) effective at solving inventory problems? Academic/practical relevance: Given that DRL has successfully been applied in computer games and robotics, supply chain researchers and companies are interested in its potential in inventory management. We provide a rigorous performance evaluation of DRL in three classic and intractable inventory problems: lost sales, dual sourcing, and multi-echelon inventory management. Methodology: We model each inventory problem as a Markov decision process and apply and tune the Asynchronous Advantage Actor-Critic (A3C) DRL algorithm for a variety of parameter settings. Results: We demonstrate that the A3C algorithm can match the performance of the state-of-the-art heuristics and other approximate dynamic programming methods. Although the initial tuning was computationally demanding and time demanding, only small changes to the tuning parameters were needed for the other studied problems. Managerial implications: Our study provides evidence that DRL can effectively solve stationary inventory problems. This is especially promising when problem-dependent heuristics are lacking. Yet, generating structural policy insight or designing specialized policies that are (ideally provably) near optimal remains desirable.
- The needs of refugees from Ukraine (short communication)Publication . Treski, Krzystof; Caban, Peter; Bermejo, José Carlos; Radkova, Libusa; Cintulova, Lucia Ludvigh; Smidova, Maria
- Multiparametric sequential injection system for the determination of nutrients in soil leachatesPublication . Nunes, Maria J. M.; Mesquita, Raquel B. R.; Ribas, Tânia C. F.; Rangel, António O. S. S.
- Antimicrobial resistance and clonal lineages of staphylococcus aureus from cattle: a cross-sectional study from the one health perspectivePublication . Silva, Vanessa; Correia, Susana; Rocha, Jaqueline; Manaia, Célia M.; Silva, Adriana; García-Díez, Juan; Pereira, José Eduardo; Semedo-Lemsaddek, Teresa; Igrejas, Gilberto; Poeta, PatríciaStaphylococcus aureus have been progressively identified in farm animals and in humans with direct contact with these animals showing that S. aureus may be a major zoonotic pathogen. Therefore, we aimed to isolate S. aureus from cows, their handlers, and their immediate surroundings, and to investigate the antimicrobial resistance and genetic lineages of the isolates. Mouth and nose swabs of 244 healthy cows (195 Maronesa, 11 Holstein-Friesians, and 28 crossbreeds), 82 farm workers, 53 water and 63 soil samples were collected. Identification of species was carried out by MALDI-TOF MS Biotyper. The presence of antimicrobial resistance genes and virulence factors was assessed based on gene search by PCR. All isolates were typed by multilocus sequence typing and spa-typing. From 442 samples, 33 (13.9%), 24 (29.3%), 1 (2%), and 1 (2%) S. aureus were recovered from cows, farm workers, water, and soil samples, respectively. Most of the isolates showed resistance only to penicillin. S. aureus isolates were ascribed to 17 sequence types (STs) and 26 spa-types. Some clonal lineages were common to both cows and farm workers such as ST30-t9413, ST72-t148, and ST45-t350. Through a One Health approach, this study revealed that there is a great diversity of clonal lineages of S. aureus in cows and their handlers. Furthermore, some S. aureus lineages are common to cows and handlers, which may suggest a possible transmission.
- Plant growth-promoting rhizobacteria (PGPR) and hydrogels as a sustainable strategy for improving maize growth under drought-stressPublication . Nóbrega, Vitória; Moreira, Helena; Castro, Paula M. L.; Pereira, Sofia I. A.
- Doçura, amor e sapientia: a trilogia da vida de uma professoraPublication . Alves, José Matias