Results 151 to 160 of about 5,343,982 (289)

Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies

open access: yesLaser &Photonics Reviews, EarlyView.
We introduce 3D nanoprinting of gold nanoparticle assemblies and show that their broad optical responses remain reproducible despite structural disorder. This robustness is attributed to ensemble‐averaged plasmonic responses from many local coupling regions.
Vasanthan Devaraj   +6 more
wiley   +1 more source

Research on distributed time synchronization methods for LEO communication constellations based on maximum likelihood estimation

open access: yesDianxin kexue
As the rapid deployment of low earth orbit (LEO) mega-constellations and the swift growth of satellite Internet unfolds, distributed satellite systems composed of a large number of LEO satellites become a significant feature of the space-air-ground ...
YAN Bing   +4 more
doaj   +2 more sources

Dual‐Metasurface‐Integrated Fiber Array for Bidirectional Cylindrical‐Vector‐Beam Multiplexed Communication Using Off‐Axis Spatial Manipulation

open access: yesLaser &Photonics Reviews, EarlyView.
A dual‐layer metasurface is integrated on a fiber‐array facet to realize compact, plug‐and‐play free‐space optical links with cylindrical vector beam (CVB) space‐division multiplexing. An optimized off‐axis collimation layer steers multiple channels, while a Dammann vortex layer performs polarization–topology conversion for bidirectional CVB (de ...
Xipeng Lu   +6 more
wiley   +1 more source

QoS handover management in LEO/MEO satellite systems

open access: yes, 2003
Low Earth Orbit (LEO) satellite networks are foreseen to complement terrestrial networks in future global mobile networks. Although space segment topology of a LEO network is characterized by periodic variations, connections of mobile stations (MSs) to ...
Papapetrou, E., Pavlidou, F. N.
core  

Recent Advances in Cryogel Applications for Musculoskeletal Regeneration

open access: yesMedicinal Research Reviews, EarlyView.
ABSTRACT Hydrogels have been widely used in tissue engineering due to their high‐water content and biocompatibility, yet their densely cross‐linked microstructure inherently limits cell infiltration, mass transport, and mechanical support. Cryogels, formed through partial freezing and crosslinking under subzero conditions, provide unique 3D macroporous
Dohee Kim   +4 more
wiley   +1 more source

Overview and outlook on routing technologies in LEO mega-constellation networks

open access: yesDianxin kexue
With the rapid growth of satellite internet traffic and the continuous decline in satellite launch costs, the deployment of low Earth orbit (LEO) satellite networks is trending toward mega-constellations and intelligent systems.
YU Hongyuan   +3 more
doaj  

Federated Learning aided LEO Satellite Communications : A Distributed Beamforming Approach

open access: yes
As the landscape of sixth-generation (6G) wireless networks advances, low-Earth-orbit (LEO) satellite communication emerges as a promising solution for offering comprehensive global communication services, though its potential is challenged by severe ...
Song, Zhengyu   +5 more
core  

Iron(III) ion reinforced P(NiPAAm‐co‐AA) beads as tunable smart organogels

open access: yesPolymer International, EarlyView.
Macroporous beads of PNiPAAm‐co‐AA copolymers were further crosslinked by iron(III) ions. The resulting beads are mechanically robust and reversibly responsive to a change of solvent from ethanol to ethyl acetate with half‐lives in the range of minutes.
Johannes Gmeiner   +2 more
wiley   +1 more source

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