11763 research outputs found
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Long-Range RFID Indoor Positioning System for an Autonomous Wheelchair
No full textArticle number - 2542(This article belongs to the Special Issue Advances in RFID-Based Indoor Positioning Systems)A new Radio-Frequency Identification (RFID) indoor positioning system (IPS) has been developed to operate in environments where the Global Positioning System (GPS) is unavailable. Traditional RFID tracking systems, such as anti-theft systems in clothing stores, typically work within close proximity to exit doors. This paper presents a novel RFID IPS capable of locating and tracking passive RFID tags over a larger area with greater precision. These tags, costing approximately EUR 0.10 each, are in the form of small stickers that can be attached to any item requiring tracking. The proposed system is designed for an autonomous wheelchair, built from scratch, which will be identified and monitored using passive RFID tags. Our new RFID IPS, with a 12 m range, is implemented in this “smart” wheelchair.This work was supported by the FCT—Fundação para a Ciência e Tecnologia, I.P. by project reference UIDB/50008/2020, and DOI identifier https://doi.org/10.54499/UIDB/50008/2020
Autoperceção dos enfermeiros das suas práticas na abordagem à pessoa adulta em situação crítica por queimadura
No full textO presente relatório integra a Unidade Curricular Estágio de Enfermagem à Pessoa em Situação Crítica com Relatório II do 2.º ano do Mestrado em Enfermagem Médico-Cirúrgica (EMC), na área de Enfermagem à Pessoa em Situação Crítica (PSC), da Escola Superior de Saúde do Politécnico de Leiria. Estrutura-se em duas partes: a primeira corresponde à reflexão crítico-reflexiva sobre o desenvolvimento de competências comuns e específicas do Enfermeiro Especialista em EMC, adquiridas nos contextos de estágio — Serviço de Urgência Polivalente, Serviço de Medicina Intensiva e em pré-hospitalar (Ambulância de Suporte Imediato de Vida/Viatura Médica de Emergência e Reanimação); a segunda parte é dedicada à componente de investigação.
A componente prática permitiu consolidar conhecimentos técnico-científicos, ético-legais e relacionais, num processo contínuo de aprendizagem e desenvolvimento profissional, com base em modelos teóricos como a Teoria de Benner e a Teoria das Transições de Meleis. A prática foi orientada para uma abordagem humanizada, segura e eficiente à PSC, com ênfase na melhoria contínua da qualidade dos cuidados.
A componente de investigação teve como principais objetivos: autoperceção dos enfermeiros do serviço de urgência relativamente à frequência das suas práticas na abordagem à pessoa adulta em situação crítica por queimadura e determinar se autoperceção dos enfermeiros do serviço de urgência relativamente à frequência das suas práticas na abordagem à pessoa adulta em situação crítica por queimadura mudou com a formação realizada.
Os resultados demonstraram um impacto positivo da formação na perceção dos profissionais, destacando a importância da educação contínua na melhoria dos cuidados especializados.
Este relatório reflete um percurso formativo enriquecedor, onde se valorizou a integração da teoria com a prática, a análise crítica e a investigação como instrumentos fundamentais para a excelência da prática em enfermagem especializada.This report is part of the Curricular Unit Nursing Internship in Critical Care with Report II of the 2nd year of the Master's Degree in Medical-Surgical Nursing (MSN), in the field of Nursing in Critical Care (NCC), at the School of Health of the Polytechnic of Leiria. It is structured in two parts: the first corresponds to a critical-reflective analysis of the development of common and specific competencies of the Specialist Nurse in MSN, acquired in the internship settings — Emergency Department, Intensive Care Unit, and pre-hospital care (Immediate Life Support Ambulance/Emergency and Resuscitation Medical Vehicle); the second part is dedicated to the research component.
The practical component allowed the consolidation of technical-scientific, ethical-legal, and relational knowledge in a continuous process of learning and professional development, based on theoretical models such as Benner’s Theory and Meleis’ Transitions Theory. The practice was oriented towards a humanized, safe, and efficient approach to NCC, emphasizing continuous quality improvement in care.
The research component had the following main objectives: to assess the self-perception of emergency department nurses regarding the frequency of their practices in the approach to critically ill adult patients with burns and to determine whether their self-perception changed after the training provided.
The results demonstrated a positive impact of the training on professionals’ perceptions, highlighting the importance of continuous education in improving specialized care.
This report reflects an enriching educational journey, emphasizing the integration of theory and practice, critical analysis, and research as fundamental tools for excellence in specialized nursing practice
An Automated Repository for the Efficient Management of Complex Documentation
No full textArticle number - 205This article belongs to the Special Issue Applications of Information Extraction, Knowledge Graphs, and Large Language ModelsThe accelerating digitalization of the public and private sectors has made information technologies (IT) indispensable in modern life. As services shift to digital platforms and technologies expand across industries, the complexity of legal, regulatory, and technical requirement documentation is growing rapidly. This increase presents significant challenges in managing, gathering, and analyzing documents, as their dispersion across various repositories and formats hinders accessibility and efficient processing. This paper presents the development of an automated repository designed to streamline the collection, classification, and analysis of cybersecurity-related documents. By harnessing the capabilities of natural language processing (NLP) models—specifically Generative Pre-Trained Transformer (GPT) technologies—the system automates text ingestion, extraction, and summarization, providing users with visual tools and organized insights into large volumes of data. The repository facilitates the efficient management of evolving cybersecurity documentation, addressing issues of accessibility, complexity, and time constraints. This paper explores the potential applications of NLP in cybersecurity documentation management and highlights the advantages of integrating automated repositories equipped with visualization and search tools. By focusing on legal documents and technical guidelines from Portugal and the European Union (EU), this applied research seeks to enhance cybersecurity governance, streamline document retrieval, and deliver actionable insights to professionals. Ultimately, the goal is to develop a scalable, adaptable platform capable of extending beyond cybersecurity to serve other industries that rely on the effective management of complex documentation
Assessing Ecological Quality on the Rocky Coast of Abalo Beach, Portugal
No full textPortugal’s rich marine biodiversity, home to approximately 550 seaweed species, is distributed across biogeographical regions influenced by Atlantic and Mediterranean climates. Human-induced stressors, including habitat degradation,
pollution, and climate change, have impacted seaweed ecosystems, changed the
distribution patterns and promoting the invasion of alien species. This paper evaluates the ecological dynamics of seaweed communities on the rocky coast of Abalo Beach, Portugal, using the Marine Macroalgae Assessment Tool (MarMAT) in 2022 and 2023. The MarMAT methodology, endorsed by the Portuguese Environment Agency, assesses the ecological quality of coastal areas based on taxonomic composition, diversity, and biomass of macroalgae. The assessment revealed different percentages of late-successional species (ESGI) and annual (ESGII) seaweeds, indicating a subtle decrease in late-successional species. Of concern is the increase in invasive species from one in 2009 to six in 2023, suggesting a potential threat to ecosystem integrity. Comparative analysis with previous studies confirms the ongoing ecolog ical quality and resilience of Abalo Beach. The article underscores the importance of continuous monitoring amid environmental changes and the rise of invasive species.This work was funded by national funds through FCT—Fundação para a Ciência e a Tecnologia for I.P., within the scope of the project UID/04292/MARE—Centro de Ciências do Mar e do Ambiente and the project LA/P/0069/2020, granted to the Associate Laboratory ARNET.info:eu-repo/semantics/publishedVersio
Attitudes and Behaviours Regarding the Sorting of Used Packaging in the Intermunicipal Community of the Leiria Region
No full textVersão em português, Site do CARME, Publicações 2025 - Relatórios Técnicos e eBooks: https://carme.ipleiria.pt/relatorio-tecnico-de-atitudes-e-comportamentos-de-separacao-de-embalagens-usadas/Versão em inglês, site do CARME, Publicações 2025 - Relatórios Técnicos e eBooks:
https://carme.ipleiria.pt/attitudes-and-behaviours-regarding-the-sorting-of-used-packaging-in-the-intermunicipal-community-of-the-leiria-region/A Comunidade Intermunicipal da Região de Leiria (CIMRL) é composta por 10 Municípios, com cerca de 287 mil habitantes (INE, 2022) e recolhe anualmente 123 022 toneladas de resíduos sólidos urbanos, dos quais apenas 17% são recolhidos de forma seletiva (INE, 2025). Neste contexto, e enquadrado no Projeto Embalagem do Futuro (PPS08), é importante compreender melhor os comportamentos e atitudes dos agregados familiares da CIMRL face à separação de embalagens usadas (plástico, metal/alumínio, vidro, cartão/papel e cápsulas de café). Tendo por base a Theory of Planned Behavior, uma das principais teorias usadas para compreender a complexidade do comportamento social humano, as normas morais e os valores pro-ambientais, foi realizado um inquérito online junto dos agregados familiares da CIMRL.This eBook, developed within the scope of the Embalagem do Futuro® Project (PPS08), summarizes the main findings of a study on household behaviours and attitudes towards the sorting of used packaging (plastic, metal/aluminium, glass, cardboard/paper, and coffee capsules) in the Intermunicipal Community of the Leiria Region (CIMRL). Based on the Theory of Planned Behaviour, one of the main theoretical frameworks used to understand the complexity of human social behaviour, together with moral norms and pro-environmental values, an online survey was conducted among households in the CIMRL. From the 1 113 validated responses, the results show a very positive attitude towards sorting used packaging, along with a sense of social pressure, moral obligation, and responsibility to do so. Households report that sorting is easy, that they have the knowledge to sort correctly, and that they hold strong proenvironmental values. Respondents declare that they sort all or almost all of their packaging waste: plastic (83%), metal/ aluminium (78%), glass (90%), and cardboard/paper (84%). Municipal recycling bins located in public spaces are the most frequently used collection points, except for coffee capsules, which are mainly deposited in recycling stations located in commercial establishments. Although most households are still unfamiliar with reverse vending machines, they express a strong intention to use them in the future and to recommend them to friends and family.Projecto:
Embalagem do Futuro®, Agenda Verde para a Inovação Empresarial, projeto de investimento n.º 59, financiado pelo PRR, NextGenerationEU
Using necessary condition analysis to understand digital storytelling’s impact on consumer behavior
No full textDigitalization disrupted the marketing landscape, enabling connection with stakeholders, but also introducing heightened
competition and digitally empowered consumers. These consumers navigate a world of information overload, pushing brands
to look for innovative communication strategies to break through the clutter. Brand storytelling emerged as a powerful tool
in this regard, engaging consumers through cognitive and emotional pathways. This study explores the necessary conditions
for effective digital storytelling campaigns, using two techniques for data analysis. Using narrative transportation theory,
and survey consumer data, the research evidences the cognitive path foundational role to convert storytelling to purchase
intention. Conversely, the emotional path, while influential for word-of-mouth, is neither a necessary nor a sufficient condi-
tion for purchase intention. These findings highlight the strategic value of overall brand equity in storytelling campaigns,
offering actionable insights for more effective marketing strategies.This work was supported by Fundação para a Ciência e a Tecnologia, grant UIDB/00315/2020, UIDB/04928/2020 and UIDB/05583/2020)
O corpo que (re)escreve ou o poema além do texto: para uma aproximação à poesia em voz alta enquanto prática performativa e de intervenção artística. O caso do sindicato de poesia
No full textPropomo-nos, neste trabalho, a abordar a poesia em voz alta enquanto prática performativa e de intervenção artística e a explorar a relação de encontro e partilha que, nesse âmbito, se estabelece entre corpos leitores/performadores/ouvintes, que, convocados por/para uma experiência artística, exercitam a leitura além do texto.
Na primeira parte, de enquadramento teórico, começamos por situar a voz poética no contexto da leitura/enunciação performativa, abordando conceitos-base que sustentam esta prática, explorando depois a dimensão de comunicação e interação com o outro a que esta intervenção artística apela.
Explicitado o quadro metodológico que nos serviu de referência, e na sua sequência, adentramos na segunda parte, empírica, em que investigamos e acompanhamos, por recurso ao estudo de caso, o trabalho de performance poética desenvolvido por um coletivo de Braga – Sindicato de Poesia –, que integra, na sua atividade, as diversas proposições de onde partimos e que procurámos observar neste projeto de investigação-intervenção.
Os resultados obtidos evidenciam que a poesia em voz alta enquanto experiência performativa passa, no essencial, pela mediação texto-corpo-espaço e aí encontra a ressonância que nos liga uns aos outros; e que o seu potencial como instrumento agregador e de intervenção, promovendo o encontro e a partilha, o pensamento crítico, a reflexão e o diálogo, é extensível a todos, seja em contexto artístico, educativo, comunitário ou individual, nas dimensões cultural, social, pedagógica e cívica
O meu percurso de aprendizagem no 1º ciclo e 2 ciclo do Ensino Básico: Adição e subtração de números racionais em contexto de ensino explorátório
No full textDiseño y validación experimental de equipos para el análisis de la fricción entre materiales
No full textEsta tesis presenta el diseño, construcción y validación experimental de un tribómetro modular y asequible, que tiene como objetivo la comparación de la fricción y el desgaste entre materiales. Esto se realiza bajo criterios de precisión y reproducibilidad que cumplen con la norma internacional ASTM G99. El equipo fue diseñado teniendo en cuenta las restricciones presupuestarias que caracterizan a los laboratorios universitarios. Se incluyó un sistema de peso muerto ajustable, sensores de carga (verticales y horizontales) y una estructura de aluminio que es sencilla para montar y adecuada para diferentes condiciones experimentales.
El estudio se centró en describir el comportamiento tribológico de muestras cilíndricas de nylon y acero de construcción que fueron expuestas a cargas normales de 9,77 N, 15,51 N y 33,52 N y recorridos de hasta 2.000 m sobre superficies abrasivas normalizadas. La medición de las fuerzas tangencial y normal en tiempo real, además del cálculo del coeficiente de fricción promedio e instantáneo, fueron parte del protocolo experimental. Igualmente, se llevaron a cabo cálculos de la potencia y energía vinculadas con el proceso de fricción, así como del desgaste por medio de la disminución de volumen y masa. Se verificó el control metrológico de los instrumentos empleados para asegurar la confiabilidad de los resultados y se llevaron a cabo las estimaciones pertinentes.
Los hallazgos experimentales mostraron que el tribómetro puede obtener coeficientes de fricción estables y constantes para los dos materiales (nylon: 0,28-0,60; acero: 0,20-0,75), así como tasas de desgaste y energía disipada compatibles con la bibliografía y los valores estándar para mecanismos abrasivos equivalentes. Se encontraron beneficios tecnológicos en el modularidad, la facilidad para recalibrar el peso aplicado y la fortaleza de la estructura; sin embargo, también se detectaron desafíos relacionados con tener que volver a calcular el peso muerto si se altera la distancia o el radio efectivo del porta-probeta.
Este avance constituye una aportación significativa tanto a nivel académico como tecnológico, ya que permite la extensión de ensayos tribológicos normalizados a situaciones con recursos escasos y da pie a nuevas líneas de indagación en la optimización de materiales y métodos experimentales en el campo de la tribología.This thesis presents the design, construction, and experimental validation of a modular and affordable tribometer, aimed at comparing friction and wear between materials. This is carried out under precision and reproducibility criteria that comply with the international ASTM G99 standard. The equipment was designed considering the budgetary constraints common to university laboratories. An adjustable dead weight system, load sensors (vertical and horizontal), and an aluminum structure that is simple to assemble and suitable for different experimental conditions were included.
The research focused on describing the tribological behavior of cylindrical test specimens made of nylon and structural steel under normal loads of 9.77 N, 15.51 N, and 33.52 N, as well as sliding distances of up to 2,000 meters; standardized abrasive surfaces were used for this purpose. The experimental protocol included the measurement of forces, friction coefficients, friction energy and power, and wear by loss of volume and mass, with corresponding calculations and metrological control.
The experimental findings showed that the tribometer can obtain stable and consistent friction coefficients for both materials (nylon: 0.28–0.60; steel: 0.20–0.75), as well as wear rates and dissipated energy in line with the literature and standard values for comparable abrasive mechanisms. Technological benefits were identified in the modularity, ease of recalibrating the applied weight, and structural strength; however, challenges were also detected related to having to recalculate the dead weight if the distance or effective radius of the sample holder is altered.
This development constitutes a significant contribution at both the academic and technological levels, as it allows the extension of standardized tribological tests to scenarios with scarce resources and paves the way for new lines of research in the optimization of materials and experimental methods in the field of tribology. The work establishes the foundation for future improvements in automation, extension of test variants, and adaptation to new applications in industrial and educational contexts
Solution for the management of Cybersecurity for Smart Homes
No full textThe rapid adoption of smart home devices has transformed modern homes by offering automation, convenience, and connectivity. However, this evolution also poses significant cybersecurity challenges. Many devices are not properly updated, rely on insecure communication protocols, or lack adequate user controls, making them vulnerable to external attacks. At the same time, most users do not have the technical knowledge necessary to manage network security, leaving their homes exposed despite growing awareness of cyber risks.
This project addresses these issues by proposing a practical cybersecurity solution designed specifically for smart homes. The goal is to provide a system that combines robust security measures with an intuitive interface accessible to both technical and non-technical users. The proposed solution enables the implementation of security measures in home networks, the secure management of connected devices, and real-time monitoring of activity, while offering advanced options for users who require greater control.
The solution was implemented and validated using real-world scenarios with typical smart devices. The results demonstrate that it is possible to achieve a balance between ease of use and robust protection in connected homes. This project therefore makes a concrete contribution to bridging the gap between complex cybersecurity mechanisms and the everyday needs of smart home users