A5087804803- Advanced Sensor and Energy Harvesting Materials
- Tactile and Sensory Interactions
- Advanced Image and Video Retrieval Techniques
- Muscle activation and electromyography studies
- Video Surveillance and Tracking Methods
- Neural Networks and Applications
- Image Retrieval and Classification Techniques
- Magnetic Field Sensors Techniques
- Magnetic properties of thin films
- Anomaly Detection Techniques and Applications
- Human Pose and Action Recognition
- Remote-Sensing Image Classification
- Video Analysis and Summarization
- Modular Robots and Swarm Intelligence
- Fault Detection and Control Systems
- Sensor Technology and Measurement Systems
- Student Assessment and Feedback
- Face and Expression Recognition
- Micro and Nano Robotics
- Electrowetting and Microfluidic Technologies
- Chemical and Physical Properties of Materials
- Trauma and Emergency Care Studies
- Biosensors and Analytical Detection
- Emotions and Moral Behavior
- Health, Education, and Aging
Hospital Braga
2024-2025
Instituto de Engenharia de Sistemas e Computadores Microsistemas e Nanotecnologias
2011-2023
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2004-2023
University of Lisbon
2004-2021
Lusíada University of Lisbon
2021
Instituto Politécnico de Lisboa
2014-2021
Queen Mary University of London
2020-2021
Instituto Superior Técnico
2005-2017
Instituto Politecnico de Setubal
2004-2015
Universidade Metodista de São Paulo
2011
In this paper we present a low-cost and easy to fabricate 3-axis tactile sensor based on magnetic technology. The consists in small magnet immersed silicone body with an Hall-effect placed below detect changes the field caused by displacements of magnet, generated external force applied body. use allows three components vector, proposed design assures high sensitivity, low hysteresis good repeatability measurement: notably, minimum sensed is about 0.007N. All are cheap retrieve assemble;...
This article compares the performance of target detectors based on adaptive background differencing public benchmark data. Five state art methods are described. The is evaluated using measures with respect to ground truth. original points comparison hand labelled truth and evaluation a large database. simpler LOTS SGM more appropriate particular task as MGM complex model.
The detection of small forces is great interest in any robotic application that involves interaction with the environment (e.g., objects manipulation, physical human-robot interaction, minimally invasive surgery), since it allows robot to detect contacts early on and act accordingly. In this letter, we present a sensor design inspired by ciliary structure frequently found nature, consisting an array permanently magnetized cylinders (cilia) patterned over giant magnetoresistance (GMR). When...
Aims/Purpose: To evaluate the use of a color blindness test (Eyecare Color Vision Test®) applied through telemedicine to assess prevalence blindness, its subtypes and intensity presentation in Brazilian industrial workers. Methods: An observational, cross‐sectional, retrospective study was carried out. The sample convenience sample, which included all patients from company with headquarters regions who underwent consultations for occupational purposes via Eyecare clinic between months...
Aims/Purpose: To evaluate the use of a color blindness test (Eyecare Color Vision Test®) applied through telemedicine to assess prevalence blindness, its subtypes and intensity presentation in Brazilian industrial workers. Methods: An observational, cross‐sectional, retrospective study was carried out. The sample convenience sample, which included all patients from company with headquarters regions who underwent consultations for occupational purposes via Eyecare clinic between months...
Polytrauma remains one of the leading causes morbidity and mortality worldwide, requiring systematized emergency approaches to optimize patient survival. The Advanced Trauma Life Support (ATLS) protocol is widely used ensure rapid assessment stabilization polytraumatized patients, prioritizing identification treatment life-threatening injuries through ABCDE approach. This integrative review analyzed literature on impact ATLS in polytrauma care, focusing its effectiveness reducing hospital...
Arterial hypertension is one of the leading causes global morbidity and mortality, being a significant risk factor for cardiovascular, cerebrovascular, renal diseases. Although conventional therapies, such as angiotensin-converting enzyme inhibitors (ACEIs), angiotensin II receptor blockers (ARBs), diuretics, beta-blockers, are widely used, many patients present treatment resistance, adverse effects, or low adherence, highlighting need innovative approaches. This integrative review analyzed...
Chiari type I malformation (CM-1) is a condition that often asymptomatic, though when symptoms occur, they commonly involve occipital headaches. Acute respiratory insufficiency as the presenting symptom requiring emergent surgical intervention extremely rare. We present case of 51-year-old female who developed sudden-onset due to CM-1 and syringomyelia affecting brainstem, necessitating urgent intervention. The patient, with history mild tetraparesis, arrived at emergency department an acute...
In this paper, we study the influence of a handshake in human emotional bond to robot. particular, evaluate willingness help robot whether first introduces itself with or without handshake. tested paradigm and have perform joint task, but at certain stage, needs navigate through an obstacle. Without requesting explicit from human, performs some attempts obstacle, suggesting that it requires help. 45 participants, measure human's perceptions social Vizzy, comparing vs non-handshake...
The growing consumer demand for large volumes of high quality fruit has generated an increasing need auto-mated control during production. Optical methods have been proved successful in a few cases, but with limitations related to the variability colors and lighting conditions tests. Tactile sensing provides valuable alternative, although it comes physical interaction that could damage fruit. To overcome these limitations, we propose usage recently developed soft tactile sensor non-invasive...
The detection of force with higher resolution than observed in humans (~1 mN) is great interest for emerging technologies, especially surgical robots, since this level could allow these devices to operate extremely sensitive environments without harming these. In paper, we present a sensor fabricated miniaturized footprint (9 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ), based on the magnetic field generated by magnetized...
Back and spine-related issues are frequent maladies that most people have or will experience during their lifetime. A common sensible observation can be made is regarding the posture of an individual. We present a new approach combines accelerometer, gyroscope, magnetometer sensor data in combination with permanent magnets assembled as wearable device capable real-time spine monitoring. An independent calibration required for each user. The processed by probabilistic classification algorithm...
Tactile sensing is crucial for robots to manipulate objects successfully. However, integrating tactile sensors into robotic hands still challenging, mainly due the need cover small multi-curved surfaces with several components that must be miniaturized. In this paper, we report design of a novel magnetic-based sensor integrated hand humanoid robot Vizzy. We designed and fabricated flexible 4 × 2 matrix Si chips magnetoresistive spin valve that, coupled single magnet, can measure contact...
Texture sensing is one of the types information sensed by humans through touch, and thus interest to robotics that this type can be acquired processed. In work we present a texture topography sensor based on ciliary structure, biological structure found in many organisms. The device consists up 9 elastic cilia with permanent magnetization assembled top highly sensitive tunneling magnetoresistance (TMR) sensor, within compact footprint 6×6 mm <sup...
Problem statement: The visual analysis of Electroencephalogram (EEG) activity has shown useful as a complementary tool in Alzheimer Disease (AD diagnosis) when the diagnosis remains uncertain, addition to be used some clinical protocols. However, this is subject inherent equipment imprecision, biological artifact, electrical records, and subjective physician interpretation variation. Artificial Neural Network (ANN) could helpful tool, appropriate address problems such prediction pattern...
The emergence of smartphones with Wireless LAN (WiFi) network interfaces brought new challenges to application developers. expected increase users connectivity will impact their expectations for example on the performance background applications. Unfortunately, number and breadth studies patterns user mobility that result from is still insufficient support this claim. This paper contributes preliminary results a large scale study usage pattern about 49000 devices 31000 who accessed at least...
These days there are a lot of vector drawings available for people to integrate into documents. come in variety formats, such as Corel, Postscript, CGM, WMF and recently SVG. Typically, ClipArt tend be archieved accessed by categories (e.g. food, shapes, transportation, etc.). However, find drawing among hundreds thousands is not an easy task. While text-driven attempts at classifying image data have been supplemented with query-by-image content, these developed bitmap-type cannot handle...
We present the fabrication process and characterization of a tunnel magnetoresistance sensor-based monolithic device assembled in Wheatstone bridge architecture, capable measuring magnetic fields both planar-sensitive directions simultaneously. This is simplified comparison with other strategies, as it does not require annealing or usage auxiliary structures to achieve two-dimensional sensitivity, by using amorphous Al2Ox barriers combined Ni-Fe Co-Fe-B electrodes Mn-Ir bias exchange...
In this paper, we present a strategy employing four coplanar magnetic sensors with single sensitive direction to detect the position of magnet in 2-D plane parallel and above sensors' plane. By positioning such way that its moment vector lies on orthogonal sensing elements' direction, signal sensor assumes quadrupolar characteristic, which takes advantage both negative positive ranges sensors, maximizing variability To validate strategy, device 3×3 mm <sup...