L.A. Rocha
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View article: Coherent deflection of atomic samples and positional mesoscopic superpositions
Coherent deflection of atomic samples and positional mesoscopic superpositions Open
We present a protocol based on the interplay between superradiance and superabsorption to achieve the coherent deflection of an atomic sample due to the momentum transfer from the atoms to a cavity field. The coherent character of this mom…
View article: NAVIGATING IPILIMUMAB-INDUCED HYPOPHYSITIS IN ADVANCED HEPATOCELLULAR CARCINOMA: A CLINICAL PERSPECTIVE
NAVIGATING IPILIMUMAB-INDUCED HYPOPHYSITIS IN ADVANCED HEPATOCELLULAR CARCINOMA: A CLINICAL PERSPECTIVE Open
Immunotherapy, represented by immune checkpoint inhibitors (ICIs), has marked a significant breakthrough in cancer treatment. Ipilimumab (IPI), an anti-CTLA-4 agent, stands out in this therapeutic landscape. However, its efficacy is not wi…
View article: Impact of comorbid coronary artery disease on short and medium-term outcomes after carotid artery stenting
Impact of comorbid coronary artery disease on short and medium-term outcomes after carotid artery stenting Open
Background Current recommendations acknowledge carotid artery disease as a clinical criteria for very high cardiovascular risk and carotid artery stenting (CAS) as one of the main therapeutic options for carotid artery stenosis. Carotid ar…
View article: Ischaemic burden reduction and impact on absolute perfusion in remote myocardium after chronic total occlusion percutaneous coronary intervention
Ischaemic burden reduction and impact on absolute perfusion in remote myocardium after chronic total occlusion percutaneous coronary intervention Open
Background Chronic total coronary occlusion (CTO) poses a complex challenge in angiographic hemodynamics. Blood supply to the affected myocardium is dependent on the formation of collateral network from adjacent vessels. However, this coro…
View article: Meningococcal Septic Oligoarthritis: An Unusual Presentation Revealing Concurrent Multiple Myeloma
Meningococcal Septic Oligoarthritis: An Unusual Presentation Revealing Concurrent Multiple Myeloma Open
Meningococcal invasive disease is rare in immunocompetent hosts but may occur in patients with risk factors. Septic arthritis is an uncommon form of presentation and is usually due to surgical colonization or hematogenous dissemination. We…
View article: A case of porto-sinusoidal vascular disease
A case of porto-sinusoidal vascular disease Open
Introduction: Porto-sinusoidal vascular syndrome is characterised by specific histological changes that do not include cirrhosis, with or without portal hypertension. Patients are usually asymptomatic until development of portal hypertensi…
View article: A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors
A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors Open
Carbon nanotubes (CNTs) are one of the most promising materials in sensing applications due to their electrical and mechanical properties. This paper presents a comparative study between CNT Buckypaper (BP) and aligned CNT-based strain sen…
View article: Resonant Accelerometer based on Double-Ended Tuning Fork and a Force Amplification Mechanism
Resonant Accelerometer based on Double-Ended Tuning Fork and a Force Amplification Mechanism Open
Resonant accelerometers are an alternative to amplitude modulated devices due to their higher integration capabilities, since they are encapsulated in vacuum and are stable at low pressures. Vacuum is required for some sensors (i.e., gyros…
View article: Low-Pressure Small MEMS Accelerometer Using Sigma-Delta Modulation
Low-Pressure Small MEMS Accelerometer Using Sigma-Delta Modulation Open
Encapsulation of MEMS accelerometers in vacuum is advantageous, since it allows integration with other sensors, leading to size and cost reduction. One technique to operate MEMS accelerometers in vacuum is the use of closed-loop Sigma-Delt…
View article: Frequency Modulated Magnetometer Using a Double-Ended Tuning Fork Resonator
Frequency Modulated Magnetometer Using a Double-Ended Tuning Fork Resonator Open
A Lorentz force MEMS magnetometer based on a double-ended tuning fork (DETF) for out-of-plane sensing is presented here. A novel configuration using a hexagonal-shaped Lorentz force transducer is used, which simplifies the sensor configura…
View article: High-Resolution Seismocardiogram Acquisition and Analysis System
High-Resolution Seismocardiogram Acquisition and Analysis System Open
Several devices and measurement approaches have recently been developed to perform ballistocardiogram (BCG) and seismocardiogram (SCG) measurements. The development of a wireless acquisition system (hardware and software), incorporating a …
View article: A novel synchronizer for a 17.9ps Nutt Time-to-Digital Converter implemented on FPGA
A novel synchronizer for a 17.9ps Nutt Time-to-Digital Converter implemented on FPGA Open
The evolution of Field-Programmable Gate Array (FPGA) technology triggered the appearance of FPGAs with higher operating frequencies and large number of resources. Simultaneously, the evolution of the FPGAs design tools has simplified the …
View article: Printing Technologies on Flexible Substrates for Printed Electronics
Printing Technologies on Flexible Substrates for Printed Electronics Open
Printing technologies have been demonstrated to be highly efficient and compatible with polymeric materials (both inks and substrates) enabling a new generation of flexible electronics applications. Conductive flexible polymers are a new c…
View article: Validation of an integrated methodology for design of grounding systems through field measurements
Validation of an integrated methodology for design of grounding systems through field measurements Open
EDP Labelec is responsible for the safety analysis of the grounding system of every new substation in the Portuguese distribution grid, and over the past 14 years, it has developed and perfected an integrated methodology for designing grou…
View article: VALIDATION OF A KNEE ANGLE MEASUREMENT SYSTEM BASED ON IMUS
VALIDATION OF A KNEE ANGLE MEASUREMENT SYSTEM BASED ON IMUS Open
Inertial Measurements Unit (IMU) based systems are a purposeful and alternative tool to monitor human gait mainly because they are cheaper, smaller and can be used without space restrictions compared to other gait analysis methods. In the …
View article: Walk distance estimation using an ankle-mounted inertial measurement unit
Walk distance estimation using an ankle-mounted inertial measurement unit Open
This work proposes walk distance estimation methods suitable for low power, low computational capability devices, using an ankle-mounted inertial measurement unit. A stride detection method using gyroscope data was implemented, and two str…
View article: Digital Platform for Wafer-Level MEMS Testing and Characterization Using Electrical Response
Digital Platform for Wafer-Level MEMS Testing and Characterization Using Electrical Response Open
The uniqueness of microelectromechanical system (MEMS) devices, with their multiphysics characteristics, presents some limitations to the borrowed test methods from traditional integrated circuits (IC) manufacturing. Although some improvem…
View article: Body Attenuation and Path Loss Exponent Estimation for RSS-Based Positioning in WSN
Body Attenuation and Path Loss Exponent Estimation for RSS-Based Positioning in WSN Open
The influence of the human body in antenna systems has significant impact in the received signal strength (RSS) of wireless transmissions. Accounting for body effect is generally considered as being able to improve position estimation base…
View article: Compensatory Postural Adjustments in an Oculus Virtual Reality Environment and the Risk of Falling in Alzheimer's Disease
Compensatory Postural Adjustments in an Oculus Virtual Reality Environment and the Risk of Falling in Alzheimer's Disease Open
Background/Aims: Alzheimer's disease (AD) patients have an impaired ability to quickly reweight central sensory dependence in response to unexpected body perturbations. Herein, we aim to study provoked compensatory postural adjustments (CP…
View article: Sensible Project: Evora Demonstrator Enabling Energy Storage and Energy Management Creating Value for Grid and Customers
Sensible Project: Evora Demonstrator Enabling Energy Storage and Energy Management Creating Value for Grid and Customers Open
This paper aims to discuss both the ICT and grid architectures of the Évora Demonstrator under the project SENSIBLE. The demonstrator is focused on testing grid management functions under normal and emergency operation in a rural low volta…
View article: Embedded Platform for Generic High-order Sigma-delta Accelerometers Testing
Embedded Platform for Generic High-order Sigma-delta Accelerometers Testing Open
"Procedia Engineering, vol. 168 (2016)"
View article: Application of Machine Learning in Postural Control Kinematics for the Diagnosis of Alzheimer’s Disease
Application of Machine Learning in Postural Control Kinematics for the Diagnosis of Alzheimer’s Disease Open
The use of wearable devices to study gait and postural control is a growing field on neurodegenerative disorders such as Alzheimer’s disease (AD). In this paper, we investigate if machine-learning classifiers offer the discriminative power…
View article: Performance Comparison of Sigma-delta Modulator Architectures for MEMS Accelerometers Using a Fully-Digital Approach
Performance Comparison of Sigma-delta Modulator Architectures for MEMS Accelerometers Using a Fully-Digital Approach Open
A comparison between different architectures of electromechanical sigma-delta modulators applied to MEMS accelerometers is presented here. Several modulation orders (2nd to 5th) and respective gains can be selected, and controlled in real-…
View article: Analysis and Characterization of Thermal-Piezoresistive MEMS Resonators
Analysis and Characterization of Thermal-Piezoresistive MEMS Resonators Open
Thermal-piezoresistive MEMS resonators based on internal thermal-piezoresistive amplification are a suitable alternative for sensing applications, since they enable high resonant frequencies and high-Q factors at ambient pressure. In this …
View article: Low-voltage, High-tuning Range MEMS Variable Capacitor Using Closed-loop Control
Low-voltage, High-tuning Range MEMS Variable Capacitor Using Closed-loop Control Open
A low-voltage, high-tuning range variable MEMS capacitor using parallel-plates electrostatic microactuators operated in close-loop is introduced in this paper. The structures were fabricated using an in-house 2-masks process on SOI wafers …