Percorrer por tipo de recurso "conference paper"
A mostrar 1 - 10 de 13
Resultados por página
Opções de ordenação
- The Bologna reform: national study on the perception and opinion of Portuguese higher education teachersPublication . Gouveia Antunes, Sandra Maria; Guedes, Anabela; FERREIRA LOUSADO, JOSÉ PAULO; Marques dos Santos, Paula AlexandraThis study aims to find out the perception of Portuguese higher education teachers about the adaptation processes adopted by national institutions to meet the challenges posed by the Bologna Reform and their opinion on the effects generated by the reforms undertaken. From a theoretical point of view, we made use of neo-institutionalism and the theory of practical action which emphasizes a cognitive perspective of professional action from an affective and evaluative perspective, considering the influence of normative schemes and pre-conscious processes that are transformed into routine behavior, internalized, and rebound into practical action. The methodological design ensured the representativeness of the higher education subsystems in the sample set, and the quota sample comprised 381 Portuguese higher education teachers. To gather data, a questionnaire survey was sent to all higher education institutions and various national bodies, using Google technology. The data analysis and the statistical treatment of the data collected were possible due to IBM SPSS Statistics software, version 21.0, using descriptive and inferential statistics. Results suggest the objectives aimed at with the Bologna Reform were only partially achieved, especially those referring to the development of students' professional and research skills, linked to the degree structure and the Bologna curricular reform, which were evaluated by a not insignificant number of teachers as not being achieved. The comparison of the results according to the sub-systems to which the teachers belong has made it possible to find out that, despite the low explanatory power that the type of education sub-system has on the differences registered in the perceptions built by their teachers around the Bologna Reform, there are statistically relevant differences between the perceptions of the various groups of teachers which suggest that teachers from private sector institutions felt more impact and more change because of the Reform than teachers from public higher education institutions. The results showed that within the private higher education sector, the teachers from the polytechnic institutions were the ones who presented the "strongest" perceptions regarding the scope registered by implementing the various Bologna dimensions, their implementation in the teaching-learning processes and regarding the globally perceived implementation of the Reform.
- CIRCULATING BETA-TRACE PROTEIN VERSUS CREATININE AS MARKERS OF EARLY KIDNEY (DYS)FUNCTION IN THE NX-INDUCED RAT MODEL OF CHRONIC KIDNEY DISEASEPublication . Lousa, Irina; Belo, Luis; Viana, Sofia D.; Vieira, Pedro; Vala Correia, Helena Maria; Santos-Silva, Alice; Reis, Flavio
- A Hybrid Strategy for Oven Optimization in Aerospace Manufacturing: Lean Principles and Mathematical ModellingPublication . Pereira, M. Teresa; Pereira, Marisa G.; Ferreira, Fernanda A.; Silva, Francisco G.; Guimarães, AndréAdopting the Lean philosophy is essential for reducing costs and increasing productivity in industrial environments, where equipment efficiency plays a pivotal role. This study focuses on optimizing the use of an oven, a critical equipment, in the aircraft parts manufacturing process, in a company producing composite components for aerospace applications. A mathematical model based on the classic two-dimensional knapsack problem was developed to address inefficiencies in space utilization and workflow inconsistencies. The model was implemented to determine the optimal parts’ allocation, maximizing oven occupancy while ensuring efficient workflows. The study introduces a hybrid strategy that combines a structured allocation system with vertical shelving units to streamline part storage and improve the kiln-loading process. Extensive experiments validated the model’s performance, demonstrating its ability to support Lean principles by enhancing productivity and reducing costs in the aeronautical industry. This work underscores the importance of mathematical modelling for optimizing manufacturing processes and meeting the increasing demands of modern production environments.
- A Importância Da Soldadura De Termoplásticos: Um Estudo De Comparação De Processos Com Caraterísticas DistintasPublication . Trindade, Adelino; Guimarães, AndréTrês dos processos de soldadura mais utilizados na ligação de termoplásticos modernos foram analisados e comparados neste trabalho, concretamente a soldadura por gás quente (HGW), a soldadura por raio laser (LBW) e a soldadura por fricção (FSW). Os processos referidos foram utilizados na soldadura de vários materiais termoplásticos distintos, dando foco em apenas três desses materiais, tais como: polipropileno (PP), polietileno (PE) e policloreto de vinil (PVC). A qualidade obtida nas diferentes soldaduras foi avaliada recorrendo a uma análise visual, bem como através de ensaios de resistencia a tracção. Foram também realizados ensaios de dureza de Vickers ás juntas soldadas, que revelaram algumas alterações microestruturais. O estudo efetuado teve como finalidade melhorar o conhecimento dos mecanismos envolvidos na execução dos processos de soldadura utilizados e na análise da resistência das juntas soldadas.
- Industry 4.0 - Assessment of Digital Readiness of Manufacturing Companies in PortugalPublication . Guimarães, André; Reis, Pedro; Charrua-Santos, FernandoThe Portuguese industrial culture is going through some challenges and difficulties in the new phase of digitalization, using the development of several technologies that provide digital solutions aligned with Industry 4.0 (I4.0). To evaluate the digital readiness for I4.0 of industries companies, namely small, medium and large companies, a IMPULS model was used, which allowed quantifying and qualifying their level of readiness to implement I4.0 technologies, considering different dimensions and subdimensions. It is found that not all companies have the same pace and facility in adopting and implementing these technologies, where business strategies are not integrated with I4.0, resulting in the absence of an accurate selfassessment on the real maturity level achieved. Therefore, it is of great importance to understand how companies are facing different challenges and difficulties in the digital transition. This work aimed to assess the level of digital readiness to I4.0 of manufacturing companies in Portugal, in global and dimensional terms for each region. The overall assessment level is low (beginner) and the Smart Infrastructure and Data-driven Services dimensions are weak (outsider).
- Industry 4.0 in Portugal - Economic Sectors MaturityPublication . Pedro Reis; Guimarães, André; Reis, Pedro; Cardoso, Antonio J. MarquesAssessing digital maturity is critical to successfully implementing Industry 4.0 in companies. This study evaluates the digital maturity of Portuguese companies across different regions and sectors using the Shift2Future tool, a self-assessment model adapted to the Portuguese context. The model assesses six dimensions: Strategy and Organization, Smart Infrastructure, Smart Operations, Smart Products, Data-Driven Services, and Human Resources, on a Likert scale from 0 to 5. Data was gathered from 610 companies across sectors like automotive, ceramics, and metalworking through a questionnaire conducted between 2022 and 2023. Using STATA 18.0 software, the analysis included Pearson correlation and Exploratory Factor Analysis (EFA). The results indicate that companies in the North and Lisbon & Tagus Valley regions exhibit higher digital maturity. Traditional sectors like ceramics and glass show lower maturity due to technological and cultural challenges. This study evaluates the digital maturity of Portuguese businesses and suggests ways to improve their Industry 4.0 competitiveness.
- Influence of Injection Conditions on Adhesion Interface in Sandwich PanelsPublication . Guimarães, André; Costa, Tiago; Trindade, Adelino; Carbas, Ricardo; Silva, L. daComposites are materiais combining a strong reinforcement with a lighter matrix for enhanced mechanical and thermal properties. A typical example is the sandwich panei, comprising sturdy outer layers and a lightweight core, such as rock wool, enclosed between them. The outer layers can be metal, wood, or plastic. In paneis with polyurethane (PUR) cores, the bond between the PUR and metal sheets can weaken over time due to stress and fatigue, potentially causing structural failure. Researchers are actively exploring methods to enhance PUR and metal sheet adhesion. Their studies encompass surface treatments, optimizing injection conditions, refining PUR composition, and computer modeling of the material interface [1, 2]. Studies by Pereira et al. [ I ] highlighted that primers significantly enhance adhesion, whereas Naik et al. [2] explored optimizing the production process through tests to ensure robust and long-lasting adhesion. This study investigated the adhesion of PUR adhesives to metal sheets under real-world production conditions. The paneis were produced in a factory environment using ali the parameters and procedures to create a fundamental part. The study aimed to identify and categorize common adhesion defects (e.g., voids, weak adhesion) that may occur during production, additionally, it aimed to develop corrective actions to prevent these defects. The study involved performing pull-out tests on specimens taken from different positions on a large board and comparing the results with reference specimens without defects.
- A Integração da Transformação Digital na Gestão de Ativos nas Empresas NacionaisPublication . Messias, Samuel; Guimarães, André; Raposo, Hugo; Estácio Marques Mendes Gaspar, Daniel AugustoEste artigo explora a importância e a integração das novas tecnologias emergentes na Gestão de Ativos nas empresas nacionais, com base nas respostas obtidas através de um questionário aplicado a 50 profissionais das diferentes áreas e departamentos destas empresas. A transformação digital tem revolucionado diversos setores, e a Gestão de Ativos não é exceção, oferecendo novas soluções, novas formas de otimização de operações, alternativas e diferentes possibilidades de reduzir custos e aumentar a eficiência. É estudado, também, através da adaptação de modelos de maturidade, o nível de Gestão de Ativos e o nível da Transformação Digital das empresas, bem como perceber se as empresas são certificadas pela ISO 55001 e se, por consequência, têm um sistema da gestão de ativos integrado. Com este questionário sobre a Transformação Digital na Gestão de Ativos, pretendese aferir se a adoção de tecnologias emergentes, como a Internet das Coisas (IoT), a Inteligência Artificial (IA), Big Data e softwares para a Gestão de Ativos, podem auxiliar ou não na Gestão dos ativos das empresas. Os resultados indicam uma crescente consciencialização sobre os benefícios da digitalização desta área tão emergente, no entanto, problemas como a resistência à mudança, a falta de competências específicas e falta de conhecimento sobre a Gestão de Ativos e sobre o seu sistema de gestão, ainda persistem.
- Lean philosophy and Value Engineering methodologies. Their relations and synergy using Bert a natural language processing modelPublication . Enrique, Daisy; Guimarães, André; Estácio Marques Mendes Gaspar, Daniel Augusto; Reis, Pedro; Cardoso, Antonio J. MarquesOrganizations worldwide in asset management and engineering consistently strive to eliminate waste through approaches like Lean and adopting core functions through concepts like Value Engineering (VE). Several authors affirmed that integrating VE with Lean can enhance, streamline, and amplify efforts to implement Lean principles in an organization. Conversely, Lean can enhance the effectiveness of VE initiatives. Therefore, based on a literature review using a natural language processing algorithm, our study focused on understanding the intersection between those two concepts. Eight main sub-topics related to Lean Manufacturing and Value Engineering were identified within three major topics. Publications on Lean Healthcare have centered on enhancing the patient experience and offer a potential pathway for incorporating Value Engineering (VE) and Lean in the future. However, there is a lack of research on applying Value Engineering in conjunction with Lean within this domain. Consequently, this presents an opportunity for future research.
- Modificação do Método Delphi para Aplicação num Questionário sobre a Transformação Digital na Gestão de AtivosPublication . Messias, Samuel; Guimarães, André; Raposo, Hugo; Estácio Marques Mendes Gaspar, Daniel AugustoA utilização de um método de avaliação e de validação é de extrema importância, neste caso, para credibilizar e fortificar a aceitação. Este artigo tem como objetivo descrever a aplicação da técnica Delphi no processo de validação do conteúdo de um questionário criado de raiz, sobre a Transformação Digital na Gestão de Ativos, para aplicação na indústria nacional. Neste estudo, participaram 25 especialistas com experiência em Gestão de Ativos e em Transformação Digital. Para a elaboração do questionário foram incluídos os seguintes temas: Gestão de Ativos, Transformação Digital, norma ISO 55001, sistemas de informação e o ciclo de vida dos ativos. Juntamente com estes temas, foram também abordados os modelos de maturidade referentes à Gestão de Ativos e à Transformação Digital. Utilizou-se o modelo do IAM (Institute of Asset Management), para avaliar do nível de maturidade da Gestão de Ativos, e utilizou-se o modelo VDMA/IMPULS para avaliar o nível de maturidade digital. A técnica Delphi utilizada, foi modificada de forma a ser adaptada para um questionário, realizada numa única ronda pelos especialistas. Os resultados apontaram para uma taxa de resposta de 72%. Os especialistas chegaram a um consenso sobre as 15 perguntas apresentadas, onde 10 questões foram validadas por unanimidade, com uma boa classificação, recebendo também algumas sugestões de melhoria, sendo que 5 não obtiveram tanto consenso. Para esta classificação e avaliação utilizou-se a escala de Likert de 1 a 5, onde “1 – Nada relevante” e “5 – Extremamente relevante”. Esta técnica Delphi, modificada, permitiu de uma forma clara, perceber as tendências e os vetores no futuro da Gestão de Ativos e da Transformação Digital. O método Delphi contribuiu para o aprimoramento da formulação do questionário, sendo esta uma etapa intermediária de um processo de validação iterativo. A opinião dos especialistas permitiu a obtenção de feedbacks construtivos e práticos para a validação das questões e da estrutura do questionário a ser utilizada.