uBibliorum
Digital Repository of the University of Beira Interior
Recent Submissions
Mitigating Dynamic Stall with a Movable Leading-Edge: the NACA0012-IK30 Wing
Publication . Camacho, Emanuel António Rodrigues ; Silva, André Resende Rodrigues da ; Marques, Flávio D.
One major problem that affects rotor blade aerodynamics is dynamic stall, characterized by a series of events where transient vortex shedding negatively affects drag and lift, leading to abrupt changes in the wing’s pitching moment. The present work focuses on the mitigation of such effects by using a modified NACA0012 airfoil: the NACA0012-IK30 airfoil, used previously for thrust enhancement in flapping propulsion. An experimental rig is designed and built to study the advantages of a time-varying pitching leading edge on a plunging wing, more specifically its influence on the aerodynamic coefficients over time. Results indicate that when the wing is not experiencing significant stall, the movable leading edge does not hold considerable influence on drag or lift. However, it can reduce the pitching moment intensity by indirectly shifting the pressure center. Contrarily, when the wing is under proper dynamic stall, the movable leading edge truly improves the aerodynamic characteristics while operating at smaller effective angles of attack. This study contributes to the long-standing discussion on how to mitigate the adverse effects of dynamic stall by providing an innovative yet simple solution.
Transcranial magnetic stimulation in behavioral addiction in the digital era: a systematic review
Publication . Almeida, Inês Roseta Duarte de; Pinto, Nuno Filipe Cardoso; Patto, Maria da Assunção Morais e Cunha Vaz
Background The rapid evolution of digital technologies and widespread internet use in daily life have led to the emergence of behavioral addictions, such as gambling disorder (GD), internet gaming disorder (IGD), and internet addiction disorder (IAD). These conditions pose complex challenges for treatment, with conventional interventions, such as psychological and pharmacological interventions, often proving insufficient. Transcranial magnetic stimulation (TMS) has been proposed as a promising approach for treating these addictions. Aims To clarify the evidence available around the use of TMS in patients with GD (internetassociated), IGD, or IAD. Specifically, to evaluate changes in frequency and extent of the addictive behavior, craving, relapse rate, and assessment of psychosocial or other functioning domains after the intervention. Methods A comprehensive search strategy was employed across multiple bibliographic databases, including PubMed/MEDLINE, Embase, Scopus, and Web of Science. The search spanned from the inception of the databases to the search date, with no language restrictions, and required full-length articles. Additionally, Grey Literature sources such as Google Scholar were searched to identify supplementary qualifying studies, and citation searching was conducted to locate additional relevant articles. Results The search yielded 460 records, with no relevant records found in Grey Literature. After removing duplicates, 244 records remained. Screening based on eligibility criteria narrowed the focus to 15 potentially relevant articles, leading to a full-text examination. Citation searching added three more studies. Ultimately, only four articles met the criteria for inclusion in this systematic review. Of these, two involved patients diagnosed with IGD and two were related to IAD. The findings generally suggest a decrease in the severity of symptoms related to internet gaming addiction, impulsivity, cravings, anxiety and depression symptoms after the use of rTMS in the left DLPFC. Similarly, in the case of IAD, a reduction in symptom severity and cravings was observed. Conclusion Despite the promising results of using high-frequency TMS on the left-DLPFC (dorsolateral prefrontal cortex), current research on the feasibility of TMS in addressing GD, IGD and IAD is minimal. Further intervention studies are needed to fully understand the potential of TMS in ameliorating these digital dependencies.
The Summer We Crossed Europe in the Rain: Lyrics for Stacey Kent, de Kazuo Ishiguro
Publication . Mancelos, João de; Pinto, Ana Paula
O “art book” The Summer We Crossed Europe in the Rain: Lyrics for Stacey Kent, do vencedor do Prémio Nobel da Literatura, Kazuo Ishiguro, constitui um exercício de intertextualidade e de atividade interartística, resultante da uma colaboração entre três criadores. Este breve estudo analisa como as letras de Kazuo Ishiguro, a música da compositora e vocalista Stacey Kent e a ilustração de Bianca Bagnarelli se conjugam para criarem uma obra coesa. Cada artista transmitiu a atmosfera de uma jornada física e emocional de uma mulher que recorda um amor perdido nos trilhos do mundo moderno.
Safeguarding lives: An informational model for communicating wildfire disasters
Publication . Toniolo, Bianca Persici; Gonçalves, Gisela; Lovari, Alessandro
This theoretical article introduces an original model for planning and evaluating risk and crisis communication by public organizations in disasters, with a particular focus on wildfires. Adopting a systemic and integrative perspective, the Loop Model synthesizes knowledge from specialized literature and draws upon well-established scientific theories and models to highlight the critical role of communication throughout every stage of forest and wildfire management. Developed through an extensive literature review and applied to the chronological pattern of wildfires in Portugal, the framework demonstrates both theoretical relevance and practical applicability. It may also be adapted as a framework for evaluating and planning communication strategies and messages in response to other climate- and weather-related disasters. The proposed model yields the Informational Quality Indicator (IQI), designed to assess the quality of public organizations’ risk and crisis communication. A higher IQI value indicates that the communication prioritizes public protection over political reputation management. By advancing a
comprehensive framework, this article contributes to the refinement of crisis and risk communication theory while offering practical guidance for public organizations facing disaster scenarios, which can be further tested in future research.
Aristotelismo
Publication . Amaral, António
Graças ao efeito contagiante de uma reabilitação da filosofia prática (Rehabilitierung der praktischen Philosophie) – mote que germina e se dissemina no panorama filosófico alemão nos inícios dos anos 70 do século passado – eis que um súbito interesse deflagra relativamente a tudo o que diga respeito a Aristóteles, com especial enfoque nos textos onde, à luz de novas e originais perspectivas, a filosofia prática pode neles ser revisitada e relançada em fertilização cruzada com todos os restantes domínios e recantos da sua obra, desde o primeiro e mais juvenil dos diálogos, o Protrepticus, até ao derradeiro tratado da maturidade, a Política.