104 documents found, page 1 of 11
A wearable IoT-based system for gait cycle duration and symmetry assessment in ...
Alves, Bruna; Fantoni, Alessandro; Matos, José Pedro; Costa, JoãoThis study presents the development of a wearable sensor designed to assess gait asymmetry. The device uses the TF mini-S LiDAR sensor to detect mid-stance and calculates the gait cycle duration to assess symmetry. The Arduino Nano RP2040 Connect microcontroller was chosen for its compact size, real-time data processing capabilities, and seamless integration with the Arduino Cloud, facilitating remote monitorin...
AI-enhanced VLC Cyber-physical Architecture for Adaptive Airport Traffic Manage...
Vieira, Manuela; Vieira, Manuel A.; Galvão, Gonçalo; Louro, Paula; Vieira, Pedro; Fantoni, AlessandroModern airports are complex Cyber-Physical Systems (CPS), where effective coordination between physical entities – like pedestrians and Autonomous Guided Vehicles (AGVs) – and computational components is essential for safety and efficiency. This study introduces a novel CPS architecture that integrates Artificial Intelligence (AI) and Visible Light Communication (VLC) to optimize mobility and enhance real-time ...
Gait cycle duration analysis in lower limb amputees using an IoT-based photonic...
Alves, Bruna; Fantoni, Alessandro; Matos, José; Costa, João; Vieira, ManuelaThis study represents a preliminary proof of concept intended to demonstrate the feasibility of using a single-point LiDAR sensor for wearable gait analysis. The study presents a low-cost wearable sensor system that integrates a single-point LiDAR module and IoT connectivity to assess Gait Cycle Duration (GCD) and gait symmetry in real time. The device is positioned on the medial side of the calf to detect the ...
A Wearable IoT-Based System for Gait Cycle Duration and Symmetry Assessment in ...
Alves, Bruna; Fantoni, Alessandro; Matos, José Pedro; Costa, JoãoThis study presents the development of a wearable sensor designed to assess gait asymmetry. The device uses the TF mini-S LiDAR sensor to detect mid-stance and calculates the gai cycle duration to assess symmetry. The Arduino Nano RP2040 Connect micro controller was chosen for its compact size, real-time data processing capabilities, and seamless integration with the Arduino Cloud, facilitating remote monitorin...
Gait Cycle Duration Analysis in Lower Limb Amputees Using an IoT-Based Photonic...
Alves, Bruna; Fantoni, Alessandro; Matos, José Pedro; Costa, João; Vieira, ManuelaThis study represents a preliminary proof of concept intended to demonstrate the feasibility of using a single-point LiDAR sensor for wearable gait analysis. The study presents a low-cost wearable sensor system that integrates a single-point LiDAR module and IoT connectivity to assess Gait Cycle Duration (GCD) and gait symmetry in real time. The device is positioned on the medial side of the calf to detect the ...
Grating coupler design for low-cost fabrication in amorphous silicon photonic i...
Almeida, Daniel; Lourenço, Paulo; Fantoni, Alessandro; Costa, João; Vieira, ManuelaPhotonic circuits find applications in biomedicine, manufacturing, quantum computing and communications. Photonic waveguides are crucial components, typically having cross-section orders of magnitude inferior when compared with other photonic components (e.g., optical fibers, light sources and photodetectors). Several light-coupling methods exist, consisting of either on-plane (e.g., adiabatic and end-fire coup...
Recent progresses in plasmonic biosensors for Point-of-Care (POC) devices: A cr...
Serafinelli, Caterina; Fantoni, Alessandro; Alegria, Elisabete; Vieira, ManuelaThe recent progresses in the research of plasmonic phenomena and materials paved the route toward the development of optical sensing platforms based on metal nanostructures with a great potential to be integrated into point-of-care (POC) devices for the next generation of sensing platforms, thus enabling real-time, highly sensitive and accurate diagnostics. In this review, firstly, the optical properties of pla...
Effect of graphene vs. reduced graphene oxide in gold nanoparticles for optical...
Carvalho, Ana P. G.; Alegria, Elisabete; Fantoni, Alessandro; Ferraria, Ana Maria; Rego, Ana; Da Costa Ribeiro, Ana PaulaAiming to develop a nanoparticle-based optical biosensor using gold nanoparticles (AuNPs) synthesized using green methods and supported by carbon-based nanomaterials, we studied the role of carbon derivatives in promoting AuNPs localized surface plasmon resonance (LSPR), as well as their morphology, dispersion, and stability. Carbon derivatives are expected to work as immobilization platforms for AuNPs, improvi...
Multichannel detector system for surface plasmon resonance biosensors
Fernandes, Miguel; Fantoni, Alessandro; Soares, Paulo; Lourenço, Paulo; Vieira, ManuelaPhotonic systems are gaining an important role in the field of medical diagnosis due to the achievable high sensitivity and selectivity and low cost, enabling the fabrication of disposable point of care diagnosis systems for multiple pathologies. In this work we present the detector subsystem developed for a multi-channel surface plasmon resonance (SPR) based sensor. The core of the system is a multimode interf...
Cross-section mismatch: metamaterials to the rescue
Lourenço, Paulo; Fantoni, Alessandro; Costa, João; Vieira, ManuelaCoupling light into and/or out of a photonic integrated circuit is often accomplished by establishing a vertical link between a single-mode optical fiber and a resonant waveguide grating, which is then followed by a tapered and a single-mode waveguides. The tapered waveguide operates as a spot-size converter, laterally expanding or contracting the light beam between the single-mode waveguide and the resonant wa...