A5062334675- Magnetic properties of thin films
- Neuroscience and Neural Engineering
- Advanced Memory and Neural Computing
- Magnetic Field Sensors Techniques
- Transcranial Magnetic Stimulation Studies
- Neurological disorders and treatments
- Electronic and Structural Properties of Oxides
- Business and Management Studies
- Microfluidic and Bio-sensing Technologies
- Atomic and Subatomic Physics Research
- Magnetic and transport properties of perovskites and related materials
- Electromagnetic Compatibility and Noise Suppression
- Autoimmune Bullous Skin Diseases
- Physics of Superconductivity and Magnetism
- Induction Heating and Inverter Technology
- Polymer-Based Agricultural Enhancements
- Maternal and Neonatal Healthcare
- Silicon Carbide Semiconductor Technologies
- Health Systems, Economic Evaluations, Quality of Life
- Peripheral Neuropathies and Disorders
- Education and Public Policy
- Health Education and Validation
- Medical Imaging and Pathology Studies
- Characterization and Applications of Magnetic Nanoparticles
- Biosensors and Analytical Detection
Universidade Federal Fluminense
2023
Instituto de Engenharia de Sistemas e Computadores Microsistemas e Nanotecnologias
2015-2021
University of Lisbon
2015-2021
Instituto Politécnico de Lisboa
2016-2018
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2018
Roche (Switzerland)
2017
AbbVie (United States)
2017
Pfizer (United States)
2017
Janssen (Belgium)
2017
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2012-2013
The Square Kilometre Array (SKA) will conduct the biggest spectroscopic galaxy survey ever, by detecting 21cm emission line of neutral hydrogen (HI) from around a billion galaxies over 3/4 sky, out to redshift z~2. This allow redshift-space matter power spectrum, and corresponding dark energy observables, be measured with unprecedented precision. In this paper, we present an improved model HI number counts bias semi-analytic simulations, use it calculate expected yield surveys variety Phase...
Industrial sensor applications rely on the implementation of full Wheatstone bridge architectures, demanding development low-cost and mass production methods magnetic tunnel junctions (MTJ) based CoFeB/MgO/CoFeB. In particular, monolithic microfabrication has been demonstrated through double deposition MTJ stacks engineered by asymmetric reference layers with non-evenly layered synthetic antiferromagnet (SAF) structures. However, extending standard SAF into a triple multilayer system brings...
In vivo experiments to detect the neuronal magnetic field require high-sensitivity magnetoresistive sensors incorporated in micromachined silicon probes that do not damage organic tissues and enhance proximity signal sources. When touch with tissues, probe experiences a mechanical stress induced by an unavoidable bending moment. To evaluate its impact on sensor performance, transfer curves noise level were measured for different applied stresses. A saturation reduction (increase) was...
This work describes how needle shape silicon probes with integrated magnetoresistive sensing elements can be used in neurosciences. The fabricated allow simultaneous electric and magnetic recording a micrometric spatial resolution, therefore offering great advantages for the detection of neural fields. In this paper we present results obtained upon insertion high sensitivity sensors mouse hippocampus brain slice submerged by Krebs solution. To perform these in-vitro experiments, an pulsed...
Precision healthcare brings many technological challenges for the development of new tools. Among these, detection biomagnetic fields in pico-Tesla range, at room temperature, requires state-of-the-art sensors with high signal-to-noise ratio. Also, given that biomedical signals are characterized by their low frequency, minimizing sensor noise has to be addressed simultaneously efforts increase sensitivity. In this paper, we maximize spin-valve sensitivity optimizing distance between poles...
Abstract A new device architecture using giant magnetoresistive sensors demonstrates the capability to detect very low magnetic fields on pT range. combination of vertically packed spin-valve with two-dimensional in-plane arrays, connected in series and parallel, delivers a final detection level 360 pT/ $$\sqrt{Hz}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mrow> <mml:mi>Hz</mml:mi> </mml:mrow> </mml:msqrt> </mml:math> at 10 Hz room temperature. The design...
Magnetoresistive sensors with high thermal robustness, low noise and spatial resolution are the answer to a number of challenging applications. Spin valve including MnNi as antiferromagnet layer provide higher exchange bias field improved stability. In this work, influence buffer type (Ta, NiFeCr) thickness on key sensor parameters (e.g. offset field, Hf) is investigated. A Ta promotes strong (111) texture which leads value MR. contrast, Hf lower for NiFeCr buffer. Micrometric display levels...
The reduction of the noise level magnetoresistive (MR) micrometric sensors is often achieved by increasing sensor area and/or connecting MR elements in large arrays. This paper introduces an innovative strategy to increase sensing without occupied on a wafer, therefore minimizing footprint. Here, idea deposit vertically spin-valve (SV) films, separated insulator. packed structure then incorporated into arrays, connected parallel and series, as general strategy. Using calculations, number SVs...
We present a system comprising multiple coils excited at single frequency and immersed in conducting liquid allowing for unprecedented deep, whole-brain transcranial magnetic stimulation (TMS). Finite-element methods were applied onto spherical head model complemented by an ellipsoidal torso. The comprises skin, skull, cerebral spinal fluid, brain tissue. Results show deep-brain induced currents reaching 85% 10-cm penetration (brain center) respect to surface (cortex) maximum. For...
We present a system comprising multiple coils immersed in conducting liquid allowing for unprecedented deep, whole-brain transcranial magnetic stimulation (TMS). The exploits configuration of large-coils with dedicated spatial asymmetries order to spare current induction the retinas and human trunk, optimizing deep-brain down center brain. resulting axially-induced currents this are prone steering by means dipole quadrupole-focusing electromagnet (DC) assemblies, its viability also analyzed...
This article examines the impact of Strategic Cost Management (SCM) on sustainable development micro and small businesses in service sector, with a focus cleaning companies. The research investigates how SCM can be vital tool for these businesses, enabling strict control over operational costs, which drives their competitiveness ensures market survival. methodology is based literature review, analyzing theoretical approaches previous studies application businesses. results suggest that...
Bio-acoustics is a common tool for studying health, welfare and behavior of living organisms. Current practice consists manually extracting labelling individual sounds out continuous recordings. This paper presents an application speeding up bio-acoustical analysis. In particular, semi-automatic has been developed that enables the extraction from Although approach can be applied to any kind recordings, in present study, focus on pig recordings within stable. More specifically, sound based...
Objetivo: O presente trabalho tem como objetivo emitir um consenso de diversas associações pacientes sobre os produtos biossimilares. Métodos: foi produzido em reunião presencial com 15 representantes 11 diferentes pacientes. Previamente ao encontro, realizou-se exercício Delphi contemplando 12 tópicos referentes a medicamentos biossimilares, sendo temas menor concordância selecionados para aulas informativas. Posteriormente, participantes reuniram-se discussão dos e elaboração do consenso....
The full potentialities of deep-brain transcranial magnetic stimulation (TMS) are presently limited by the so-called surface discontinuity effect. This effect is responsible for a strong reduction capability TMS systems to reach satisfactorily regions with biostimulatory and/or bioinhibitory purposes. Consequently, large number neuropathologies that could potentially profit from remain either unknown, or yield clinical trials inconclusive results. Previous simulation studies have pointed...
When analyzing biological samples, measurement probe placement is of critical importance, as signals are typically characterized by small amplitudes, and thus a close proximity to the source aforementioned signal necessary maximize noise ratio. In this work, we present Stay-on-Target (SoT): low-cost, micrometrically precise, fully motorized, semi-automatic positioning system developed for manipulation needle-shape magnetoresistive within sample tissue. The proposed composed three units -...
Mapping the brain's activity can be done either with non-invasive techniques (e.g. magnetic resonance, electro/magnetoencephalography), or by studies performed in-vivo/vitro at cell level usually using small-sized electrodes (10 μm) to measure local potentials. Probing locally neuronal fields created synaptic currents magnetrodes [1], which combine high sensitive magnetoresistive sensors (spinvalve, SV) micro-machined Si probes. The SV were deposited ion beam following stack: Ta 2/Ni <sub...
In recent years the development of power semiconductor technology led to an enhancement in IGBT level, allowing withstand greater levels currents and voltages at higher switching frequencies. As a result, use high-power IGBTs industrial applications has increased. Computational modeling performs critical step project analysis application. Thus, this work analyzes behavioral model capable reproducing main static dynamic characteristics IGBT, taking into account influence temperature.
<b>Abstract.</b> With the increase in population that Planet Earth will be subject next 30 years, it is extremely important food production increases order to feed these contingents of people. For this, techniques such as fertilization can used more frequently bring greater productivity crops. The problem fertilizers overuse are losses leaching nutrients, which eventually contaminate water bodies and springs. adoption sustainable forms controlled release polymers may favor reduction total...