A5113672789- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Energy Harvesting in Wireless Networks
- Radio Astronomy Observations and Technology
- Radio Frequency Integrated Circuit Design
- Superconducting and THz Device Technology
- Bluetooth and Wireless Communication Technologies
- Terahertz technology and applications
- Semiconductor Lasers and Optical Devices
- Wireless Body Area Networks
- Veterinary Pharmacology and Anesthesia
- Direction-of-Arrival Estimation Techniques
- Advanced Power Amplifier Design
- Sensor Technology and Measurement Systems
- Topic Modeling
- Veterinary Medicine and Surgery
- Natural Language Processing Techniques
- Thermal Regulation in Medicine
- Ultrasound Imaging and Elastography
- Advanced Adaptive Filtering Techniques
- Advanced Text Analysis Techniques
- Galician and Iberian cultural studies
- Microwave Imaging and Scattering Analysis
Universidade Federal de Santa Maria
2024
Universidad Carlos III de Madrid
2009-2023
University of Colorado Boulder
2021
Universidad Nacional Autónoma de México
2020
e-Cigarette or vaping-induced lung injury (EVALI) causes a spectrum of CT patterns. Relative frequencies and associations with vaping behavior are unknown.What the imaging findings patterns in EVALI what is relationship to behavior?CT scans 160 subjects from 15 institutions were retrospectively reviewed. defined agreed on via consensus. The parenchymal organizing pneumonia (OP) pattern was as regional diffuse ground-glass opacity (GGO) ± consolidation without centrilobular nodules (CNs). An...
This paper presents a single layer low profile broadband circularly polarized (CP) metasurface (MTS) antenna fed through Coplanar Waveguide (CPW). The MTS consists of 3x4 rectangular cells. Contrary to conventional technique based on plotting surface current distribution demonstrate the CP operation, Characteristic Mode Analysis (CMA) is employed give more insight into and explain characteristic. It revealed that modes 1 2 have potential achieve along wide frequency band. proposed...
The requirements for the VGOS (VLBI Global Observation System) [1] are: feed system covering 2 to 14 GHz bandwidth and also working with high efficiency (> 50%). Universidad Carlos III de Madrid has developed a new topology cover them. receiver is based on log-spiral antenna printed conical surface. Two interesting characteristics are presented: first one dual circular polarization compared linear recorded in state of art [2]. other comes from fact that uses self-complementary concept, so...
This paper presents a miniaturized single layer low profile metasurface (MTS) antenna fed through Coplanar waveguide (CPW). The is constituted by 3x4 rectangular loop cells. In different way to that of the conventional MTS, proposed unit cell compact size due its inductive effect. characteristic mode analysis shows two orthogonal modes can be excited for circular polarization radiation. Simulated results show an impedance band 20.8% and 3dB axial ratio 5.1% with peak realized gain 8dBi.
VLBI2010 requires a feed that simultaneously has high efficiency over the full 2-14 GHz frequency range. The simultaneity requirement implies must operate at range without need to adjust its focal position account for dependent phase center variations. Two feeds meet this specification with some lacks be fulfilled [1]: Eleven Feed developed Chalmers University and Quadruple Ridged Flared Horn (QRFH) California Institute of Technology. In frame, Universidad Carlos III de Madrid new topology...
This paper presents an ultra-wideband (UWB) compact size printed monopole antenna with improved gain and efficiency. broadband contains a cup-shaped radiator fed by coplanar waveguide (CPW) technique. The designed UWB is fabricated on less-priced FR-4 substrate relative permittivity of 4.3, loss tangent 0.025, standard height 1.6 mm, sized at 31.68 mm <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\times 23.76$</tex> 1.6$</tex> suitable for...
In this article, a low-cost switching hardware system is developed, and Delay Sum (DAS) algorithm implemented for the early detection of breast cancer. It based on operation near field radar, with use ultra wide band (UWB) microwave signals through emission reception electromagnetic waves from set switched antennas around breast, that propagate tissue. composed low cost, readily available commercial components resulting in device both portable moderate cost. The consists frequency domain...
The assessment of rectal temperature and behavior is an important parameter in all patients for whom hyperbaric oxygen (HBO2) therapy used. study aims to verify if there less reduction body after HBO2 restless their during the therapeutic session. Clinical data from 217 sessions with 2 2,5 atmospheres absolute (ATA) were reviewed under protocols 30 (P1) or 45 (P2) minutes, covering 29 canines 13 felines. Behavioral data, initial (iRT), final (fRT), variation between them (RTv) each patient...
This paper presents the design of an updated version dual polarized ultra wideband feed system for covering new VGOS (VLBI Global Observation System). is based on array four elements self-complementary conical log spiral antennas. The achieves VGOS's requirements with operating high efficiency (> 50%) in a wide bandwidth from 2 GHz to 14 GHz. It provides two attractive characteristics: circular polarization compared linear ones state art solutions and also real constant input impedance whole...
A low-cost electromagnetic sensor system inspired by metamaterials has been developed for the detection of glyphosate. The structure is composed a group SRRs (Split Ring Resonator) that allow generation an field. This field permit sensing contaminant glyphosate in water. accurate quantification involves three bands. was tested with various sample concentrations. Results from preliminary simulation agreed those experiment and reaffirm this can detect presence wide range Finally, response...
This work presents a solution for matching electrically small antennas in broadband and multiband applications where efficiency levels should not be very low. To do this, two-port antenna concept is introduced to design an embedded LC structure the architecture of antenna. Simulation results are presented upper part VHF band (80-180 MHz) lower UHF (300-500 MHz).
A new topology covering the VGOS (VLBI Global Observation System) configuration is presented. The VGOS's requirement a feed system from 2 GHz to 14 GHz. receiver based on log-spiral antenna printed conical surface. To achieve dual circular polarization, an array of four elements proposed. proper balun for feeding and whole band also simulated results radiation patterns show pretty high symmetry in at all frequencies with maximum CP-XP level greater than 15 dB 10 gain.
This paper presents our systems to solve Task 3 of Semeval-2020, which aims predict the effect that context has on human perception similarity words. The task consists two subtasks in English, Croatian, Finnish, and Slovenian: (1) predicting change (2) scores similarity, both them for a pair words within different contexts. We tackled problem by developing systems, first one uses centroid approach word vectors. second ELMo language model, is trained each with given context. Our achieved...
With the help of in-body antennas, wireless communication among implantable medical devices (IMDs) and exterior monitoring equipment, telemetry system has brought us many benefits. Thus, a very thin-profile circularly polarized (CP) antenna, functioning in ISM band at 2.45 GHz, is proposed. A tapered coplanar waveguide (CPW) method used to excite antenna. The radiator contains pentagonal shape with five horizontal slits inside obtain circular polarization behavior. bendable Roger Duroid...
In telemetry applications, biomedical antennas perform a critical function. This study describes small-profile, low-profile, circular-polarized antenna operating at frequency of 2.45 GHz. To keep the size small, it is provided via modified coplanar waveguide technology (CPW). produce circularly polarized desired range, radiant monopole comprises grooved rectangular patch with slit 45-degree angle and tiny, truncated left end CPW ground plane. obtain bending capacity, RT5880 (εr = 2.2, tan...
Background: Nos felinos, a neuromiopatia isquêmica é doença que mais comumente leva à amputação. Na medicina veterinária, o uso de próteses em membros pouco difundido, assim, na maioria dos casos, opta-se pela amputação total do membro quando há indicação. Entretanto, oxigenioterapia hiperbárica (OHB) uma alternativa com diversos benefícios para tratamento afecções vasculares envolvam reperfusão, isquemia e infecção. Desse modo, objetivo estudo reportar as vantagens proporcionadas OHB no da...
RESUMO Fundo: Os anti-inflamatórios não esteroides (AINEs) exercem seu efeito analgésico através da inibição periférica síntese de prostaglandinas e uma variedade outros mecanismos periféricos centrais. No entanto, os AINEs estão associados a alguns efeitos adversos, principalmente relacionados aos sistemas gastrointestinal, renal hepático, necessidade destacando pesquisas para o desenvolvimento medicamentos mais seguros. Portanto, objetivo deste estudo foi avaliar eficácia administração...