Results 41 to 50 of about 4,749,527 (270)

Frequency dissemination with free-space optical links [PDF]

open access: yes, 2010
Optical clock technology is very certain to be integrated in the next high precision time standards. The demand for higher accuracy in time synchronization makes the use of free-space optical links necessary for frequency dissemination, especially if ...
Mata Calvo, Ramon   +2 more
core  

Nitrospinics: Nitride Materials for Spin‐Orbit and Orbital Torques From Memory to Artificial Intelligence

open access: yesAdvanced Functional Materials, EarlyView.
Further advances in applications can be anticipated through the development of unique and functional materials beyond conventional alloys. Nitrogen enables tailor‐made orbital textures in various transition‐metal hosts, paving the way for devices ranging from spintronics memory to artificial intelligence hardware.
Prabhat Kumar   +3 more
wiley   +1 more source

DIRECT OPTICAL HIGH SPEED DOWNLINKS AND GROUND STATION NETWORKS FOR SMALL LEO MISSIONS [PDF]

open access: yes, 2010
Direct microwave data downlink capacity of today’s earth observation satellites is limited in terms of available spectrum, transmission data rate, and power consumption.
Giggenbach, Dirk   +3 more
core  

Unexpected Asymmetric Mn‐Sb Site Mixing and Reentrant Spin‐Glass State of MnSb2Te4

open access: yesAdvanced Functional Materials, EarlyView.
MnSb2Te4 is an intrinsic magnetic topological insulator. Its properties are extraordinarily sensitive to tiny defects, making structural studies essential for understanding how magnetism and topology work together. This work shows that Mn can be unevenly distributed within the crystal and how that disorder is linked to a newly reported spin‐glass state
Gustavo Chavez Ponce de Leon   +7 more
wiley   +1 more source

Pulse position modulation coding schemes for optical intersatellite links [PDF]

open access: yes, 2007
The rapid and significant development of communications links between satellites has made it possible to use various applications such as relay voice, video, multimedia, etc.
Ghosna, Fadi, Sibley, Martin J.N.
core   +4 more sources

Research on Key Technologies of Elastic Satellite Optical Network Based on Optical Service Unit

open access: yesApplied Sciences
With the advent of 6G technologies, satellite communication networks are in urgent need of innovative bearer technologies to meet the demands of government and enterprise private lines as well as computing power networks.
Wei Zhou   +4 more
doaj   +1 more source

Neuromorphic Devices for Extreme Environments: State‐Variable Reliability and Stabilization Strategies

open access: yesAdvanced Functional Materials, EarlyView.
Neuromorphic devices for extreme environments are interpreted through the physical states that store and process information. Radiation, temperature extremes, and vacuum can perturb vacancies, filaments, trapped charges, polarization, interfaces, and readout signals.
Taehyun Park   +7 more
wiley   +1 more source

A Technical Evaluation of Integrating Optical Inter-Satellite Links into Proliferated Polar LEO Constellations [PDF]

open access: yes, 2020
This study evaluates the technical requirements, benefits, and limitations of integrating optical inter-satellite links into a proliferated polar LEO constellation.
Ingersoll, Joshua
core   +1 more source

Advancing OAM-Based FSO Systems: Tackling Pointing Errors for Next-Generation Space and Terrestrial Links

open access: yesIEEE Photonics Journal
Orbital Angular Momentum (OAM)-based Free-Space Optical (FSO) communication systems offer immense potential for high-capacity, secure links, but their performance is highly sensitive to pointing errors. This paper provides a comprehensive analysis of OAM
Mohammad Taghi Dabiri   +2 more
doaj   +1 more source

An Error Protection Protocol for user-transparent bridging of Fast Ethernet data transmission over the optical fading channel in an Aeronautical environment [PDF]

open access: yes, 2008
This paper presents an extensive insight into error protection techniques for free space optical links, focusing in particular in aeronautic stratospherically applications.
Serrano-Solsona, Clara   +2 more
core  

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