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- Tracking Oil Price Shocks and Airline Stock Reactions Using Entropy-Based ApproachesPublication . Aslam, Faheem; Ferreira, Paulo; Oliveira, Márcia; Almeida, Dora; Corresponding author: Ferreira, Paulo.The relationship between oil prices and the airline industry is economically important yet empirically complex, presenting significant challenges, with prior research yielding conflicting evidence on the nature, strength, and direction of their interaction. This study contributes to the literature moving beyond traditional linear assumptions, applying Shannon and R´enyi transfer entropy to evaluate the nonlinear and state-dependent information flow between oil, oil volatility, and six international airline indices. The empirical findings reveal a significant but heterogeneous information flow between West Texas Intermediate (WTI) and airline indices, suggesting a relationship of mutual influence, where the directional information flow from WTI to airline indices consistently surpasses the reverse flow. In the case of the Crude Oil Volatility Index (OVX), results show a dominant flow of information from each airline index to the OVX index, indicating that sector-specific shocks can shape market expectations of oil volatility. The R´enyi entropy analysis further uncovers tail-driven dynamics: at low orders of R´enyi entropy, the entropy values remained predominantly negative between WTI and airline indices, while they remained predominantly positive, particularly from OVX to airline indices. However, at very high orders of entropy, there is a more traditional flow of information from WTI to airline indices. These findings enable policymakers to develop more effective, targeted, and economically sound energy policies for the transportation sector and the wider economy.
- Risk without borders: atransfer entropy analysis of geopolitical spillovers in low-and lower-middle-income marketsPublication . Almeida, Dora; Ferreira, Paulo Jorge Silveira; Aslam, FaheemHow geopolitical risk affects stock markets in low and lower-middle-income countries remains an area often overlooked. This study analyzes daily data from 2014 to 2025 for 16 stock markets and two geopolitical risk subindices, acts and threats. The transfer entropy is applied in a dynamic framework to measure asymmetric and time-varying information flows. The findings reveal a heterogeneous influence of acts and threats, varying by country-income level, geographic region, and over time, and suggest an increased sensitivity of financial markets after 2020, particularly in response to acts rather than threats. This highlights distinct geopolitical risk transmission, requiring tailored investment strategies and policy responses
- O papel da liderança escolar na promoção de competências socioemocionais: evidências de um estudo bibliométricoPublication . Cristóvão, Ana Maria; Valente, S.; Rebelo, HugoNeste artigo, discutimos o papel das lideranças escolares na promoção das competências socioemocionais num contexto educativo marcado por desafios pedagógicos, organizacionais e emocionais. Partimos de uma visão holística e humanista da educação, defendendo a liderança pedagógica e transformadora como a mais adequada para promover climas escolares seguros, afetivos e inclusivos. O objetivo foi analisar como a liderança escolar contribui para o desenvolvimento de competências socioemocionais nos alunos. Como metodologia, foram usadas as análises bibliométrica e de conteúdo, em estudos identificados nas plataformas Google Scholar, Scopus e Web of Science. Após a seleção, nove publicações cumpriram os critérios de inclusão. Cerca de metade dos estudos destaca a relevância das competências de aprendizagem socioemocional dos líderes para práticas mais eficazes (empatia, consciência social, decisão responsável). Há evidência consistente de impacto no clima e na cultura escolar. Persistem barreiras: preparação insuficiente dos líderes, pressões por resultados académicos e constrangimentos sociopolíticos. Concluímos que as lideranças escolares são determinantes para a integração sustentável da aprendizagem socioemocional sendo importante repensar a formação de líderes, incorporando competências socioemocionais e políticas de apoio que consolidem ambientes educativos promotores do bem estar e do sucesso
- “Com os imigrantes é tudo e mais alguma coisa” - Dimensões da Prática para a Integração de Migrantes em Territórios de Baixa DensidadePublication . Diogo, ElisabeteESUMOObjetivo da Investigação: O presente estudo procura identificar e compreender as práticas profissionaisdos técnicos sociais junto de Imigrantes Nacionais de Países Terceiros (NPT) em Territórios de Baixa Densidade(TBD), particularmente nas sub-regiões do Alto-Alentejo, Alentejo Central e Baixo Alentejo. Metodologia:Utilizandouma abordagem qualitativa, conduzido pela questão de investigação “Que práticas profissionais dirigidas a imigrantes NPT em TBD?”, o desenho de investigação empíricarcorreu a entrevistas individuais e conjuntas (n=8), alvo de uma análise temática apoiada pelo programa informático MaxQDA12.Resultados: Os resultados preliminares do estudo apontam para uma significativa amplitude da intervenção, centrada em dimensões assistencialistas, no âmbito do apoio socioeconómico para a sobrevivência e garantia dos Direitos Fundamentais, para dimensões relacionais focadas na pro-moção de competências, flexibilidade, proximidade, disponibilidade e referência, bem como para dimensões político-legais de informação e acesso a direitos e deveres, e à cultura.Originalidade/Valor: O artigo destaca-se pela atenção que dá à imigração internacional em Territórios de Baixa Densidade, territórios carenciados de investigação, de políticas públicas, e de população. Destaca os contributos e dá voz aos técnicos sociais, quepor via de um trabalho próximo junto aos imigrantes, no quadro do desenvolvimento destes territórios com potencial para informar a política e a prática
- Money Issues in Child Foster Care: Practitioners and Carers' InsightsPublication . Diogo, Elisabete; Delgado, PauloIn Portugal there is an increasing demand for child foster care placements, however there is a shortage of carers within a solidary nature. Carers receive compensation for their service and professionalization is not considered. In light of the lack of knowledge in this area, our aim is to provide insights into financial matters, focused on remuneration’s impact on motivation levels to foster, and the evaluation of fostering experiences in relation to expenses. Thematic analysis of interviews with foster carers and practitioners (n=13) was informed by the Grounded Theory. The findings indicated financial considerations influence the motivation of specific applicant groups, namely unemployed. The financial strain associated with the direct and indirect costs of fostering was outweighed by the benefits of providing a family environment for foster children. Given the economic constraints, adequate compensation could be a form of recognition. To increase foster carers’ recruitment and retention it was advocated reimbursement of healthcare costs. Finally, we discuss implications for policy and practice and how the legal framework has evolved to carers’ dignified remuneration, tax and employment status.
- “Para mim faz todo o sentido” – uma abordagem participativa ao desenho da política de proteção da criançaPublication . Elisete DiogoNotwithstanding the legal milestones observed in the Portuguese child protection system (CPS), several concerns call for political action to ensure the effective guarantee of children’s rights. In this context, it is imperative to discuss proposals for reforming the CPS. Agreement on these proposals by the stakeholders in the system is key to validating and improving the system. Therefore, the main research questions of the present study are (1) what is the level of agreement among stakeholders in the CPS on certain proposals for child protection reform? and (2) what are the positions on those proposals? Mixed methods were conducted based on an online survey (n = 292), supported by Qualtrics, and eight focus groups involving stakeholders as former beneficiaries, families, practition ers and academics (n = 18). Findings show a harmonious alignment with the proposals, justifying an urgent reform of the CPS and the need to strengthen a child-centred system. Three themes emerged: promotion of quality family-based care and promotion of adoption; development of child-friendly terminology; and improvement of the CPS administration. The conclusions highlight implications for policy and practice.
- Imigração em Territórios de Baixa Densidade. Um olhar sociológico dirigido aos processos de integração social de Nacionais de Países TerceirosPublication . Elisete Diogo; Alves, João Emílio
- Stakeholders’ positions on proposals for child protection reformPublication . Elisete Diogo
- The implementation of the Biorefinary Concept to Jatropha curcas L. crop in MozambiquePublication . Suzana Ferreira-Dias; Gominho, Jorge; Vasconcelos, Manuel; Bianchi de Aguiar, F; Pereira, H.
- Storage stability of Jatropha curcas L. oil naturally rich in gamma-tocopherolPublication . Rodrigues, Joana; Miranda, Isabel; Furquim, Leonnardo; Gominho, Jorge; Vasconcelos, Manuel; Barradas, Gonçalo; Pereira, Helena; et al.Jatropha curcas L. is an interesting tropical oil crop for biodiesel production. However, seed conservation until oil extraction may be a problem under high temperature and humidity. In this study, Jatropha curcas L. seeds grown in Mozambique and presenting 160 mg/kg of gamma-tocopherol in their oil were stored for 42 days, in dark, at 35 ◦C and 75% or 92% relative humidity (RH). Along storage, the oil was extracted and analysed in terms of fatty acid composition, tocopherol content, acidity, initial and final oxidation products (monitored by K232 and K270 values, respectively). Jatropha seeds presented an initial water content of 8.4% and an oil content of 45.7% (dry basis). The oil was rich in oleic (41.2%) and linoleic (38.8%) acids. Along 42 days of storage, the acidity increased from 0.8% to 7.4% and 25.3% and K270 increased from 0.07 to 0.25 and 0.46 in oils from seeds stored at 75% and 92% RH, respectively. Simultaneously, a decrease in gamma-tocopherol content was observed, which was more pronounced at 92% RH than at 75% RH (96% decrease versus 57% decrease). Gamma-tocopherol showed to protectthe oil against oxidation principally during the second stage of oxidation. During the storage at 35 ◦C, the fatty acid composition of the oils from seeds kept either at 75% or 92% of humidity, did not significantly vary throughout the test