Results 11 to 20 of about 203,301 (156)

La señal de la cruz: un automatismo muy poco frecuente en la epilepsia del lóbulo temporal. Descripción de dos casos

open access: yesRevista de neurología (Ed. impresa), 2023
Introducción. En la evaluación de la epilepsia farmacorresistente, el análisis detallado de la semiología es fundamental para establecer una hipótesis diagnóstica de la localización de la zona epileptógena.
Alejandro Fernández-Cabrera   +5 more
semanticscholar   +1 more source

Influence of Geometrical Parameters on the Optical Activity of Chiral Gold Nanorods

open access: yesAdvanced Optical Materials, Volume 11, Issue 18, September 18, 2023., 2023
The origin of the plasmonic optical activity from chiral gold nanorods is analyzed through theoretical modeling based on full‐wave electrodynamic simulations. A systematic analysis of the influence of structural details on the plasmonic circular dichroism spectra of rod‐shaped gold nanoparticles with helical features is presented.
Manuel Obelleiro‐Liz   +5 more
wiley   +1 more source

An educational tool for understanding MPEG‐2 video compression and coding techniques

open access: yesComputer Applications in Engineering Education, Volume 31, Issue 5, Page 1219-1233, September 2023., 2023
Abstract The understanding of the video encoding/decoding processes is a key skill for students of computer science, engineering, or telecommunications, especially those specialized in multimedia. The special characteristics of the video signals, and how such features are leveraged to compress the video frames using coding theory, are hard to ...
Unai Fernández‐Plazaola   +2 more
wiley   +1 more source

Learning outcomes measured in zoo and aquarium conservation education

open access: yesConservation Biology, Volume 37, Issue 1, February 2023., 2023
Abstract Communicating the topic of conservation to the public and encouraging proenvironmental behaviors can mitigate loss of biodiversity. Thus, the evaluation of educational efforts is important to ascertain the educational effects and provide high‐quality conservation education.
Jana Schilbert, Annette Scheersoi
wiley   +1 more source

Chiral Seeded Growth of Gold Nanorods Into Fourfold Twisted Nanoparticles with Plasmonic Optical Activity

open access: yesAdvanced Materials, Volume 35, Issue 1, January 5, 2023., 2023
Fourfold twisted Au nanorods can be prepared via chiral seeded growth, using cysteine as a chiral inducer. A high dissymmetry factor is obtained and electromagnetic simulations show chiral plasmon modes with largely asymmetric near‐field enhancement. The mechanism involved in chiral growth is related with cysteine‐induced enantioselective development ...
Bing Ni   +18 more
wiley   +1 more source

La ecuación discreta de Pocklington aplicada a la transformación de mediciones de campo cercano en campo lejano

open access: yesCientífica, 2017
Los sistemas actuales de comunicaciones móviles, de tecnología MIMO, requieren de antenas inteligentes capaces de utilizar favorablemente la multitrayectoria para mejorar la calidad de la señal deseada.
Luis Carrión-Rivera   +2 more
semanticscholar   +1 more source

Criterios de teoría de la información en procesado adaptativo de la señal y aplicaciones

open access: yes, 1995
En esta tesis hemos querido básicamente considerar el diseño de funciones de coste para adaptación ciega en un amplio margen de aplicaciones en el ámbito de las comunicaciones digitales, tomando en consideración los siguientes problemas de recuperación ...
Josep Sala-Alvarez
semanticscholar   +1 more source

Performance Analysis of Polarization Diversity for Indoor Scenarios at 41.4 GHz and 61.5 GHz

open access: yesInternational Journal of Antennas and Propagation, 2012
We present the radio channel experiments conducted in indoor scenarios to test the performance of a dual orthogonal polarization scheme in the single-branch receiver end of a mobile system with a centre frequency of 41.4 GHz and 61.5 GHz.
Ana Vazquez Alejos   +2 more
doaj   +1 more source

A Propagation Model for Subsurface and Through-Wall Imaging Applications under the Frequency Dispersion Perspective

open access: yesInternational Journal of Antennas and Propagation, 2013
The frequency-dependent behavior in subsurface and through-the-wall media is analyzed in this paper as well as the formation of the Brillouin precursor waveforms inherently related to this feature.
Ana Vazquez Alejos, Muhammad Dawood
doaj   +1 more source

Protolenguaje musical

open access: yesEpistemus, 2018
Nuestra investigación quiere demostrar la teoría según la cual el origen del lenguaje es detectable en la continuidad de las estructuras morfológicas que han afectado al uso de las vocalizaciones de música prototípica y lenguaje.
Alessandra Anastasi
doaj   +1 more source

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