Results 11 to 20 of about 65,189,289 (126)

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

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

Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS

open access: yesInternational Journal of Antennas and Propagation, 2012
Some of the most recent developments in reconfigurable reflectarrays using surface-mounted RF-MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper.
Eduardo Carrasco   +3 more
doaj   +1 more source

A new space technology for ocean observation: the SMOS mission

open access: yesScientia Marina, 2012
Capability for sea surface salinity observation was an important gap in ocean remote sensing in the last few decades of the 20th century. New technological developments during the 1990s at the European Space Agency led to the proposal of SMOS (Soil ...
Jordi Font   +34 more
doaj   +1 more source

Mecanismos de mejora de la calidad de experiencia sobre redes 802.11 [PDF]

open access: yes, 2010
Tesis Univ. Granada. Departamento de Teoría de la Señal, Telemática y Comunicaciones.
Navarro Ortiz, Jorge
core   +1 more source

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