RCIPL
Repositório Institucional do Politécnico de Lisboa
Entradas recentes
Pantograph-catenary offline hardware-in-the-loop hybrid testing
Publication . Santos, J. P.; Antunes, P.; Pombo, J.; Rebelo, J. M.; Schirrer, A.; Jakubek, S.; Tur, M.; Gregori, S.; Pombo, João; Elsevier
Hybrid testing boosts the development and analysis of complex mechanical systems by combining physical testing with a computer-modelled environment. In railway dynamics, Hardware-in-the-Loop (HiL) simulation is a hybrid testing method sought after to study complex interactions, particularly between the pantograph and the catenary. Existing pantograph-catenary HiL approaches require real-time catenary models which restrict fidelity and spatial resolution. This paper proposes an iterative offline HiL method that removes this constraint while maintaining hybrid testing capability. The proposed methodology is established through a set of test experiments, considering different pantograph uplift forces and the stagger of the overhead contact wire. The feasibility and convergence of the proposed method is demonstrated for a set of test cases. Advantages and disadvantages of the online and offline approaches are discussed, together with further developments that may be considered to improve them.
Female gamers’ evaluation of influencer-generated gaming content: The roles of informativeness, playfulness, and homophily
Publication . Rita, Paulo; Santos, Zelia Raposo; Zhou, Ran
Abstract
Influencer-generated content has become a prominent source of information and entertainment in digital gaming environments, yet limited research has examined how female gamers cognitively and affectively evaluate such content. This study examines how perceived informativeness, playfulness, and homophily are associated with attitudes toward influencer-generated gaming content and how these attitudes, in turn, are associated with purchase intention. The study uses a TPB-informed attitude-intention model, complemented by Social Influence Theory and a gender-sensitive contextual perspective. Survey data from 340 female gamers were analyzed using partial least squares structural equation modeling (PLS-SEM). Perceived informativeness and playfulness were significantly positively associated with attitude, whereas homophily was not significantly associated with attitude. Attitude, in turn, was significantly positively associated with purchase intention. Formal coefficient comparisons showed that the associations of informativeness and playfulness with attitude were significantly stronger than the association of homophily with attitude, while the informativeness and playfulness associations did not differ significantly. The study provides a contextual extension of influencer-marketing and digital-persuasion research by examining content-based and relational evaluations within an underexamined female-gamer context.
Integração de sistemas fotovoltaico e de armazenamento de energia em fábrica de grupos eletrogéneos
Publication . Paiva, João Moreno de; Luís, Ricardo Jorge Ferreira
Esta dissertação estuda a integração de geração fotovoltaica para autoconsumo com a valorização elétrica da energia anteriormente dissipada em calor nos ensaios dos grupos eletrogéneos, complementada por um banco de baterias e por um controlador dos modos de operação do conversor de potência, integrado na rede AC da fábrica. O trabalho utiliza dados reais de consumo, potência fotovoltaica instalada e energia dissipada nos bancos de carga, e recorre a simulação numérica para dimensionamento e avaliação do desempenho.
A avaliação económico-financeira, para um horizonte de 25 anos, indica que a configuração com dois módulos de baterias (144 kWh) apresenta VAL de 67 840 € e TIR de 11,0%, mantendo viabilidade sob a tarifa horária. Em termos ambientais, a solução final reduz 64,2 tCO2e/ano, o que corresponde a 27,2% da meta de redução definida para a fábrica.
Os resultados demonstram a exequibilidade técnica do sistema e a sua contribuição simultânea para a eficiência energética e a redução de emissões, em linha com os objetivos da Grupel.
Desafios da integração curricular entre ciências naturais e matemática
Publication . Rodrigues, Margarida; Valente, Bianor; Maurício, Paulo; Carvalho, Renata; Correia, M. [et al.]
Este estudo analisa os desafios associados à planificação e implementação de atividades interdisciplinares envolvendo Ciências Naturais e Matemática, em turmas de 2.º Ciclo do Ensino Básico, no contexto de Estudos de Aula que decorreram no âmbito da Prática de Ensino Supervisionada numa Escola Superior de Educação. O estudo de aula, modelo colaborativo de desenvolvimento profissional, envolve planeamento, implementação e reflexão coletiva sobre uma “aula de investigação”. A metodologia qualitativa incluiu observação participante, entrevistas e recolha documental, envolvendo quatro estagiárias, cinco professoras cooperantes e quatro supervisores. Os resultados indicam que os desafios residem na definição e articulação de conteúdos, planeamento de atividades interdisciplinares, conciliação de horários e limitação de tempo, equilíbrio da participação de estagiárias e cooperantes, execução prática das tarefas e equilíbrio entre áreas disciplinares. Incidentes microdidáticos e problemas logísticos também afetaram a implementação. Estes desafios relacionam-se tanto com a metodologia do Estudo de Aula quanto com a complexidade da interdisciplinaridade procurada nas tarefas desenvolvidas.
Preparing future communication professionals for disasters and emergencies: integrating WHO RCCE-IM into public relations education
Publication . Nunes, Tatiana; Raposo, Ana Luísa; Claxton, Nancy
Preparing future communication professionals for disasters and emergencies is a pressing challenge for Public Relations education. Unlike Crisis Communication which focuses on organisational response and reputational threat, Risk Communication within Public Relations emphasises prevention, preparedness and behaviour change. In disaster contexts, communication is not centred on organisational image but on reducing harm, sustaining public trust and protecting lives (L’Etang, 2013; Diers-Lawson & Qureshi, 2021). Recent emergencies, including pandemics, climate-related hazards and complex humanitarian crises, show that risk communication failures significantly exacerbate vulnerability and undermine response effectiveness. Evidence from global health emergencies shows that communication constitutes an intervention in its own right, with direct consequences on mitigating harm and saving lives (Diers-Lawson & Qureshi, 2021). The World Health Organization’s (WHO) Risk Communication, Community Engagement and Infodemic Management (RCCE-IM) framework is a core pillar of preparedness and response. It is one of the eight core capacities under the International Health Regulations (2024) which all States commit to develop and implement (WHO, 2005a). RCCE-IM serves as a vital communication tool, meditating between experts, authorities, media and communities while driving social and behaviour change. Trust emerges as the central organising principle, reinforcing the idea that “the overriding goal for outbreak communications is to communicate with the public in ways that build, maintain or restore trust” (WHO, 2005b). Despite its importance, RCCE-IM is largely absent from PR and Communication curricula, leaving future professionals unprepared for their roles in multidisciplinary emergencies. This paper addresses this gap through a pilot elective course on RCCE-IM in a Bachelor’s Degree in Public Relations and Corporate Communication at a Higher Education Institution in Portugal. Launching in the second semester of the 2025/2026 academic year, the course integrates WHO RCCE-IM principles and tools into PR education oriented toward disasters and health emergencies. This is the first such course in a communications faculty with plans to additionally develop an aligned curriculum for public health and medical students in Ukraine. To assess the impact of integrating RCCE-IM into PR education, this study adopts the WHO Capability Mapping tool (CapMap) as its primary evaluation framework. CapMap is a capability-based self-assessment instrument developed by the WHO Regional Office for Europe to support professionals working in RCCE-IM to identify strengths and areas for development across six interdependent subject areas: evidence generation, risk communication, community engagement, infodemic management, capacity-building and operational management (Gregory & Salvi, 2025). In this pilot course, students complete the CapMap assessment at the beginning and at the end of the semester. Comparative analysis of pre- and post-course self-assessments enables an examination of perceived capability development across RCCE-IM domains, offering an initial indication of the course’s contribution to strengthen these competences. The implementation of this pilot project will allow teams to assess the advantages and areas for improvement in applying this framework in the context of higher education institutions. Based on the conclusions presented, the aim is to extend this methodology to other higher education institutions, increasing the number of communication professionals trained and prepared to act in coordination with the WHO in disaster and emergencies. In conclusion, integrating RCCE-IM into Public Relations education intends to contribute to a necessary reconfiguration of professional training, positioning this framework as both an essential public health intervention and a core communication competence for the future of disaster and emergency communication.