447 documents found, page 1 of 45
A cloud-driven support layer for enhancing distributed IDS in IoT networks
Funchal, Gustavo Silva; Pedrosa, Tiago; Prieta, Fernando De la; Leitão, PauloThe exponential growth of connected devices, including sensors, mobile equipment, and various Internet of Things (IoT) nodes, has significantly increased the volume of data generated at the edge. Traditionally, data analysis tasks are offloaded to centralized cloud servers, resulting in increased latency, bandwidth bottlenecks and privacy concerns. While edge computing addresses these limitations by enabling lo...
Collaborative fault tolerance for cyber–physical systems: The detection stage
Piardi, Luís; Oliveira, André Schneider; Costa, Pedro; Leitão, PauloIn the era of Industry 4.0, fault tolerance is essential for maintaining the robustness and resilience of industrial systems facing unforeseen or undesirable disturbances. Current methodologies for fault tolerance stages namely, detection, diagnosis, and recovery, do not correspond with the accelerated technological evolution pace over the past two decades. Driven by the advent of digital technologies such as I...
High-resolution portable bluetooth module for ECG and EMG acquisition
Luiz, Luiz E.; Soares, Salviano; Valente, Antonio; Barroso, João; Leitão, Paulo; Teixeira, João PauloPortable ECG/sEMG acquisition systems for telemedicine often lack application flexibility (e.g., limited configurability, signal validation) and efficient wireless data handling. A modular biosignal acquisition system with up to 8 channels, 24-bit resolution and configurable sampling (1–4 kHz) is proposed, featuring per-channel gain/source adjustments, internal MUX-based reference drive, and visual electrode in...
The role of multi-agent systems in realizing asset administration shell type 3
Sakurada, Lucas; Prieta, Fernando De la; Leitão, PauloIn the context of Industry 4.0 (I4.0), the Asset Administration Shell (AAS) has been gaining significant attention in recent years. The AAS serves as a standardized digital representation of an asset, encapsulating all relevant information about the asset throughout its lifecycle. Since its introduction in 2015, the past decade has seen considerable progress in developing traditional AAS solutions, namely AAS T...
Industrial Metaverse Digital Twin: ISO 23247 Compliant Architecture for AI-Driv...
Oliveira Júnior, Alexandre de; Calvo-Rolle, José Luis; Pires, Rui; Leitão, PauloThe Industrial Metaverse marks a new stage in Industry 4.0, raising the representation level of Digital Twins (DT) from discrete elements to an interconnected network of assets covering the entire production ecosystem. This paradigm changing reflects advances in enabling technologies such as Artificial Intelligence (AI) and complex what-if simulations. As complexity increases, adopting established industrial st...
Microservices architecture to enable an open platform for realizing zero defect...
Lopes, Rui Pedro; Ibrahim, Ahmed; Barbosa, José; Leitão, PauloThe market's demand for high-quality products necessitates innovative manufacturing approaches that emphasize flexibility, adaptability, and the reduction of defects. Traditional systems are currently evolving towards embracing I4.0 technologies, including data collection, processing, analytics and digital twin, aiming for zero-defect manufacturing quality. This paper introduces an open platform, compliant with...
Uma perspetiva sobre o investimento municipal oitocentista em tempo de crise
Leitão, PauloThe slow use of the revenue allocated to the Municipal Road Fund generated balances of some financial significance, which municipal administrations used, motivated and authorised by successive governments, for other purposes, especially from 1892 onwards, which coincided, not by chance, with the crisis at the end of the Constitutional Monarchy. The municipalities reacted positively to the possibility opened up ...
Ten years of asset administration shell: developments, research opportunities, ...
Sakurada, Lucas; Prieta, Fernando de la; Leitão, PauloOver the past decade, the Asset Administration Shell (AAS) has emerged as a cornerstone of digital transformation in Industry 4.0 (I4.0), providing a standardized approach to managing digital representations of industrial assets. With 2025 marking approximately ten years since its introduction, this article aims to provide a comprehensive analysis and discussion of AAS development over the past decade, potentia...
Portable system and user interface for ECG and EMG acquisition, conditioning, a...
Luiz, Luiz E.; Silva, Wilson J. da; Soares, Salviano; Leitão, Paulo; Teixeira, João PauloElectrical signals from the human body are constantly the focus of research, searching for a better understanding of physiological events, discovering early signs of disease, and improving life quality. Developing devices that allow research beyond the usual requirements and allow easy adaptation regarding the system's acquisition, conditioning, and processing parts could be a step toward better understanding s...
On the impact of message brokers implementations in the choreography of microse...
Ahmed Gamal Ibrahim; Lopes, Rui Pedro; Rufino, José; Leitão, PauloCommunication brokers are essential in modern software development to enable efficient, reliable, and scalable message passing within microservices architectures. However, flawed or delayed communication could be a massive setback that prevents achieving real-time analytics. This paper compares four prominent brokers: Apache Kafka, ActiveMQ Artemis, RabbitMQ, and NATS. Their performance is evaluated in terms of...