This study presents a simple, low-cost, and efficient route to obtain zinc oxide by adopting the thermal decomposition method of zinc acetate at 300 (Gr@ZnO_300), 400 (Gr@ZnO_400), 500 (Gr@ZnO_500), and 600 °C (Gr@ZnO_600) for 1 h. The diffraction patterns collected for the samples indicated the majority formation of the hexagonal phase (P63mc) for zinc oxide and residual amounts for graphitic carbon, which has a hexagonal structure of space group P63/mmc. The images collected by scanning electron microscopy (SEM) revealed the formation of sub-microcrystals with elongated rod-shaped morphology, with dimensions between 0.223 and 1.09 μm. The optical and colourimetric properties of the obtained materials indicate the presence of graphitic carbon in the samples, corroborating the analysis by XRD and Raman spectroscopy, with an optical bandgap close to 3.21 eV, and energies of the valence (E_VB) and conduction (E_CB) bands of 2.89 eV and −0.31 eV, respectively. The photocatalytic performance at 20 min of exposure time under UV light of all prepared samples in the decolourisation of rhodamine B (RhB) dye solutions follows the order Gr@ZnO_300 (95.6%) > Gr@ZnO_600 (92.8%) > Gr@ZnO_400 (84.0%) > Gr@ZnO_500 (78.1%), where the photocatalytic performance of Gr@ZnO_300 sample was 16.5 times more effective than the photolysis test. Moreover, the results confirmed that the best performance was archived at pH = 10, and the holes (h⁺) and superoxide (O₂^•−) radicals are the main species involved in the discolouration of RhB dye molecules in an aqueous medium. Finally, the reusability experiment shows high stability of the Gr@ZnO_300 sample as a solid photocatalyst and cycling capability, which obtained total discolouration of RhB of a solution under five cycling experiments of 60 min of exposure to UV light at room temperature.

Este artigo apresenta uma estratégia de tutoria aplicada à Capacitação Avançada em Robótica Industrial, desenvolvida no Polo de Inovação do Instituto Federal do Amazonas (INOVA/IFAM) em parceria com a LG Electronics do Brasil. O estudo analisa a integração das metodologias Hands-on, Aprendizagem Baseada em Projetos (PBL) e Design Thinking (DT) na formação de equipes multidisciplinares, voltadas à resolução de desafios reais do Polo Industrial de Manaus. A pesquisa adotou uma abordagem qualitativa e quantitativa, envolvendo observação direta, acompanhamento de projetos e aplicação de questionários de satisfação a 27 alunos participantes. A tutoria teve papel essencial no processo, estimulando competências técnicas (hard skills) — como programação e operação de braços robóticos Yaskawa, Stäubli, Epson e Universal Robots — e competências socioemocionais (soft skills), como colaboração, empatia e criatividade. Os resultados evidenciaram elevados índices de engajamento e satisfação dos alunos, reforçando a relevância da mentoria contínua na aprendizagem significativa e na retenção de conteúdos. Conclui-se que o modelo proposto promove uma ponte efetiva entre ensino e indústria, contribuindo para a qualificação de profissionais aptos a atuar com tecnologias emergentes no contexto amazônico e fortalecendo a educação profissional e tecnológica como vetor de inovação e desenvolvimento regional.

A proposta deste trabalho é modelar, simular a dinâmica e estimar os parâmetros de uma mesa XY aplicada em máquinas-ferramenta convencionais para permitir o controle usando estratégias adaptativas. Para isto, o modelo dinâmico será simulado através do método de Newmark e a estimação dos parâmetros, parâme tros modais e sinal de excitação será desenvolvida por três métodos: mínimos quadrados clássico (LS), mínimos quadrados recursivo (RLS) e mínimos quadrados estendido (ELS), para efeito de análise e comparação da performance dos resultados de estimação.

This work presents the integration of Competency-Based Learning (CBL), Project-Based Learning (PBL), and Design Thinking (DT) as a methodology to develop both hard and soft skills, as well as competencies, in the field of automation engineering. In response to the government's limited investment in education and technology, LG Electronics and IFAM launched a project aimed at training engineering students in industrial robotics. The integrated CBL/PBL/DT methodology merges educational and industrial innovation practices by following the principles of active learning and involves practical classes conducted in both a university and a factory setting, with students organized into two groups of 15. The results demonstrate the significant potential of these integrated methods, as they successfully achieved the project's proposed objectives.