27 documents found, page 1 of 3
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...
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...
Designing stemie, the evolution of the Kid Grígora educational robot
Barradas, Rolando; Lencastre, José Alberto; Soares, Salviano; Valente, AntónioSTEM education advances at the same rate as the need for new and more evolved tools. This article introduces the latest version of the Kid Grígora educational robot, based on the work of Barradas et al. (2019). Targeted for students aged 8 to 18, the robot serves as an interdisciplinary teaching tool, integrated into STEM curricula. The upgraded version corrects what we’ve learned from a real test with 177 stud...
A narrative review of speech and EEG features for schizophrenia detection: prog...
Teixeira, Felipe; Costa, Miguel Rocha; Abreu, J.L. Pio; Cabral, Manuel; Soares, Salviano; Teixeira, João PauloSchizophrenia is a mental illness that affects an estimated 21 million people worldwide. The literature establishes that electroencephalography (EEG) is a well-implemented means of studying and diagnosing mental disorders. However, it is known that speech and language provide unique and essential information about human thought. Semantic and emotional content, semantic coherence, syntactic structure, and comple...
Sensor architecture model for unmanned aerial vehicles dedicated to electrical ...
Berger, Guido; Braun, João; Oliveira Júnior, Alexandre de; Lima, José; Pereira, Ana I.; Valente, António; Soares, Salviano; Rech, Lucas C.This research proposes positioning obstacle detection sensors by multirotor unmanned aerial vehicles (UAVs) dedicated to detailed inspections in high voltage towers. Different obstacle detection sensors are analyzed to compose a multisensory architecture in a multirotor UAV. The representation of the beam pattern of the sensors is modeled in the CoppeliaSim simulator to analyze the sensors’ coverage and detecti...
Viticulture under climate change: a case study on a water scarcity model
Pereira, Leonor; Valente, António; Soares, Bruno; Costa, Carlos M.; Soares, Salviano; Lima, José; Gonçalves, IgorChanges in climatic patterns hinder the prediction of water availability, being imperative to develop new strategies to optimise water management in the agricultural sector. A multi-sensor network is being developed by ADVID/CoLAB VINES&WINES and University of Trás-os-Montes and Alto Douro (UTAD), aiming to determine water stress in vineyards, as a Decision Support System (DSS) for winegrowers. Remote wireless ...
Robot-assisted rehabilitation architecture supported by a distributed data acqu...
Chellal, Arezki Abderrahim; Lima, José; Gonçalves, José; Fernandes, Florbela P.; Pacheco, Maria F.; Monteiro, Fernando C.; Brito, ThadeuRehabilitation robotics aims to facilitate the rehabilitation procedure for patients and physical therapists. This field has a relatively long history dating back to the 1990s; however, their implementation and the standardisation of their application in the medical field does not follow the same pace, mainly due to their complexity of reproduction and the need for their approval by the authorities. This paper ...
A LoRaWAN IoT system for smart agriculture for vine water status determination
Valente, António; Costa, Carlos M.; Pereira, Leonor Sousa; Soares, Bruno; Lima, José; Soares, SalvianoIn view of the actual climate change scenario felt across the globe, resource management is crucial, especially with regard to water. In this sense, continuous monitoring of plant water status is essential to optimise not only crop management but also water resources. Currently, monitoring of vine water status is done through expensive and time-consuming methods that do not allow continuous monitoring, which is...
F0, LPC, and MFCC analysis for emotion recognition based on speech
Teixeira, Felipe; Teixeira, João Paulo; Soares, Salviano; Abreu, J.L. PioIn this work, research was done to understand what is needed to build a database to recognise emotions through speech. Some features that can highlight a good success rate for emotion recognition through speech were investigated. Also studied were some characteristics (symptoms) that can be associated with a specific emotional state. On the other hand, we also studied some features that can be used to identify ...
A low-cost mobile robot for STEM subjects
Barradas, Rolando; Lencastre, José Alberto; Soares, Salviano; Valente, AntónioSTEM areas (Science, Technology, Engineering and Math) are continuously growing but the number of technical workers do not accompany that growth. As the 21st century brings new challenges, students should be prepared for an increasingly complex life and work environments that will privilege proficiency in Learning and Innovation Skills that include Creativity and Innovation, Critical Thinking and Problem Solvin...