Listar Colecciones de Investigación y Producción Científica - Ikerketa eta ekoizpen zientifikoko Bildumak por título
Mostrando ítems 4671-4690 de 8238
-
Low profile multi-frequency dipole antenna array based on planar meta-surfaces
In this paper, the radiation performance of a low profile multi-frequency dipole antenna array with a planar meta-surface is presented. The meta-surface consists of two closely located parallel grids of short dipoles and ... -
Low profile THz periodic leaky-wave antenna
In this work, a 0.566THz flat leaky-wave antenna, consisting of a central λ0/2 slot surrounded by straight parallel wedge corrugations, is numerically and experimentally analyzed. Simulations show a moderately high gain ... -
Low-cost eye tracking calibration: a knowledge-based study
Subject calibration has been demonstrated to improve the accuracy in high-performance eye trackers. However, the true weight of calibration in off-the-shelf eye tracking solutions is still not addressed. In this work, a ... -
Low-cost online monitoring system for the etching process in fiber optic sensors by computer vision
The present research exposes a novel methodology to manufacture fiber optic sensors following the etching process by Hydrofluoric Acid deposition through a real-time monitoring diameter measurement by computer vision. ... -
Low-loss and dual-band filter inspired by glide symmetry principle over millimeter-wave spectrum for 5G cellular networks
This paper focuses on designing a dual-band, bandpass filter configuration inspired by glide-symmetric structures in a single plane. Geometry configuration of elliptical slots on both sides of single substrate generally ... -
Low-power class-AB CMOS voltage feedback current operational amplifier with tunable gain and bandwidth
A CMOS class AB variable gain Voltage Feedback Current Operational Amplifier (VFCOA) is presented. The implementation is based on class AB second generation current conveyors and exploits an electronically tunable ... -
Low-power ultrasonic front-end for cargo container monitoring
A low-power ultrasonic communication system conceived for cargo container monitoring is presented. Two piezoelectric transducers operating at 40 kHz are used for generating and acquiring an ultrasonic signal through the ... -
Low-power wide-bandwidth CMOS indirect current feedback instrumentation amplifier
The analysis and design trade-offs of a simple and economical technique to implement wideband low-voltage CMOS instrumentation amplifiers (IAs) based on indirect current feedback (ICF), are described. The input and an ... -
A low-profile antenna for on-body and off-body applications in the lower and upper ISM and WLAN bands
The article presents a Co-planar Waveguide (CPW) fed antenna of a low-profile, simple geometry, and compact size operating at the dual band for ISM and WLAN applications for 5G communication devices. The antenna has a ... -
Low-profile conformal UWB antenna for UAV applications
This article presents a new design of an ultra-wideband conformal antenna for Unmanned Aerial Vehicle (UAV) applications. The antenna is a low-profile structure which is very suitable to diminish aerial vehicle drag problem. ... -
Low-sidelobe-level millimeter-wave asymmetric bull's eye antenna with minimal profile feeding
Bull’s eye antennas exhibit remarkable directivity considering their low profile, albeit accompanied by high sidelobes. This undesirable radiation characteristic is tackled here by reporting a complementary split ring ... -
Low-voltage 0.81mW, 1-32 CMOS VGA with 5% bandwidth variations and -38dB DC rejection
A CMOS low-voltage amplifier with approximately constant bandwidth and DC rejection is introduced. The design is based on the cascade of a wide linear input range OTA, an op-amp and a servo-loop with extremely large time ... -
Low-voltage CMOS bulk-driven buffer with bootstrapping technique for gain enhancement and THD-noise reduction
In this paper, a bootstrapping technique is applied to a bulk-driven voltage buffer for canceling the gate-source transconductance in order to improve the cell gain, the linearity and reduce the input-referred noise. The ... -
Luces y sombras de la tercera revolución verde. Demandas sociales, opciones agrícolas y desacuerdos narrativos
Este trabajo explora cómo se construye y determina la identidad del proceso que agrupa y delimita a la primera, la segunda y la tercera revolución verde. Se muestra la validez situada, precaria y contingente de los principales ... -
Lucha tras las rejas franquistas: la Prisión Central de Mujeres de Segovia
Edificio de tipo panóptico inaugurado en 1924 como Reformatorio de Mujeres, posteriormente sería Hospital Asilo Penitenciario para ancianos y enfermos de tuberculosis. Con la guerra civil se vio abarrotado de presos ... -
Ludopatía y trabajo: análisis de las repercusiones laborales de los jugadores patológicos de máquinas tragaperras
En este artículo se presenta un estudio sobre las alteraciones laborales en una muestra de 121 jugadores patológicos de máquinas tragaperras. Las principales repercusiones laborales identificadas son, por orden de importancia, ... -
Ludwik Fleck y los olvidos de la sociología
Presentación del segundo artículo epistemológico que Ludwik Fleck (Zur Krise der «Wirklichkeit») redactó en el año 1929. -
Un lugar para la empresa en la política industrial
Este artículo establece los déficits que se observan en la inversión en recursos intangibles (capital directivo y capital organizacional), en las empresas españolas cuando se comparan con las empresas de los países más ... -
Los lugares de la memoria histórica y el mapa de fosas de Navarra
Se presenta un estudio general sobre la reciente ley Foral 29/2018 que regula los lugares de la memoria histórica de Navarra, dedicada a preservar la memoria de los hechos históricos y honrar a las víctimas que sufrieron ... -
Luminance calibration of a full sky HDR imaging system using sky scanner measurements
A full sky High Dynamic Range imaging system, based on a Single-Lens Reflex camera with a fisheye lens, has been constructed and calibrated with a sky scanner luminance meter. The method considers the geometrical, spectral, ...