Listar Artículos de revista - Aldizkari artikuluak por título
Mostrando ítems 5426-5445 de 5730
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UAVradio: Radio link path loss estimation for UAVs
The UAVRadio Python module is a comprehensive toolkit designed to facilitate the analysis and prediction of radio signal path loss in Unmanned Aerial Vehicle (UAV) communication scenarios. The module encompasses a range ... -
La UE frente al crimen organizado: América latina y el tráfico de cocaína
La Criminalidad Organizada tiene en el tráfico de cocaína uno de los negocios más lucrativos y de mayor difusión a nivel global. La UE es consciente de esta realidad, así como de su potencial para afectar sociedades y ... -
UiO-66 MOF-Derived Ru@ZrO2 catalysts for photo-thermal CO2 hydrogenation
The use of metal–organic frameworks (MOFs) as templates or precursors in the manufacture of heterogeneous catalysts is highly attractive due to the transfer of MOFs’ inherent porosity and homogeneous metallic distribution ... -
Ulpiano vence al odio: la victoria del Estado de Derecho sobre el terrorismo a la luz de El mal de Corcira de Lorenzo Silva
El mal de Corcira es una novela de Lorenzo Silva en la que el responsable de la investigación del asesinato de un antiguo militante de ETA (el guardia civil Bevilacqua) rememora los años en los que ... -
Ultra-compact planoconcave zoned metallic lens based on the fishnet metamaterial
A 1.5λ0 -thick planoconcave zoned lens based on the fishnet metamaterial is demonstrated experimentally at millimeter wavelengths. The zoning technique applied allows a volume reduction of 60% compared to a full fishnet ... -
Ultra-long (290 km) remote interrogation sensor network based on a random distributed feedback fiber laser
In this work, an interferometric sensor has been interrogated 290 km away from the monitoring station, reaching the longest distance in fiber optic sensing up to date. This has been attained by employing a double-pumped ... -
Ultra-low frequency multidirectional harvester for wind turbines
In this paper we propose, and demonstrate through a prototype, a completely novel device able to harvest mechanical energy from the multidirectional vibrations in a wind turbine, and convert it into electrical, to power ... -
Ultra-wide band corrugated profiled horn antenna design
Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes and low crosspolar levels in a very wide bandwidth. Gaussian Profiled Horn Antennas (GPHA’s) have demonstrated its feasibility ... -
Ultra-wideband metamaterial filter based on electroinductive-wave coupling between microstrips
In this work, we analyse the frequency response of microstrip lines coupled by complementary split ring resonators (CSRRs) etched on the ground plane supporting electroinductive waves (EIWs). The single-particle ... -
Ultrafast electrooptic dual-comb interferometry
Dual-comb interferometry is a particularly compelling technique that relies on the phase coherence of two laser frequency combs for measuring broadband complex spectra. This method is rapidly advancing the field of optical ... -
Ultrahigh refractive index sensitivity with lossy mode resonance in a side-polished low-index polymer optical fiber
This work presents a theoretical–experimental study of a refractive index (RI) sensor based on lossy mode resonances (LMRs) generated with a side-polished low-index polymer optical fiber. The theoretical part involves ... -
Ultrahigh sensitive detection of tau protein as Alzheimer's biomarker via microfluidics and nanofunctionalized optical fiber sensors
Alzheimer’s disease (AD) is one of the most common neurodegenerative illnesses displaying the highest death rate in the elderly. However, the existing AD diagnostic system remains elusive due to lack of a technology that ... -
Ultrahigh-sensitivity sensors based on thin-film coated long period gratings with reduced diameter, in transition mode and near the dispersion turning point
The mode transition and the dispersion turning point have been explored for optimization of thin-film coated long period fiber gratings during the last years. In this work and additional parameter, the cladding diameter, ... -
Ultrametrics for context-aware comparison of binary images
Quantitative image comparison has been a key topic in the image processing literature for the past 30 years. The reasons for it are diverse, and so is the range of applications in which measures of comparison are needed. ... -
Ultrathin and high-efficiency Pancharatnam-Berry phase metalens for millimeter waves
Applying the Pancharatnam–Berry (PB) principle to half-wave plate (HWP) metasurfaces allows the manipulation of wavefronts along with the conversion of the handedness of circularly polarized incident waves by simply rotating ... -
Ultrathin sub-terahertz half-wave plate with high conversion efficiency based on zigzag metasurface
In this communication, an ultrathin transmissive half-wave plate (HWP) based on a bi-layered zigzag metasurface operating at the lower frequency edge of the terahertz (THz) spectrum is numerically and experimentally studied. ... -
Ultraviolet erythemal irradiance (UVER) under different sky conditions in Burgos, Spain: multilinear regression and artificial neural network models
Different strategies for modeling Global Horizontal UltraViolet Erythemal irradiance (GHUVE) based on meteorological parameters measured in Burgos (Spain) have been developed. The experimental campaign ran from September ... -
Ultzamako hizkeraren polimorfismo aizenaren inflexioan
El objetivo de este artículo es mostrar y analizar la variación sincrónica que surge en la inflexión nominal en una variedad del euskara, -la variedad alto-navarra de Lizaso-. Demostraremos que la variación fonética no se ... -
Umbrales de representación y proporcionalidad
¿Cómo medir la proporcionalidad de los sistemas de representación proporcional (RP)? Esta cuestión se ha confundido con la de los denominados «umbrales de representación». En el artículo se repasa la historia del descubrimiento ... -
UNAI: auge y fracaso de la izquierda revolucionaria en Navarra
La Unión Navarra de Izquierdas (UNAI) fue una plataforma electoral formada en 1977 para presentarse a las elecciones generales del 15 de junio y pretendió recoger en su seno a las diferentes corrientes izquierdistas del ...