Results 151 to 160 of about 306,809 (340)
Service offerings and interfaces for the ACTS network of Earth stations [PDF]
The Advanced Communications Satellite (ACTS) is capable of two modes of communication. Mode 1 is a mesh network of Earth stations using baseband-switched, time-division multiple-access (BBS-TDMA) and hopping beams.
Coney, Thom A.
core +1 more source
Advanced Science, EarlyView.Two‐terminal polymer memristors based on cyano‐functionalized copolymer films are developed via a solvent‐free, initiated chemical vapor deposition (iCVD) process for high‐resolution image classification. Molecularly engineered p(CEA‐co‐DEGDVE) films enable stable, linear, and symmetric conductance modulation, supporting multi‐level weight mapping in ...
Ji In Kim +10 more
wiley +1 more source
Programmable Chiral Radiation via Spin‐Decoupled Metasurface with Integrated Compound Phases
Advanced Science, EarlyView.A programmable spin‐decoupled metasurface integrating propagation and geometric phases enables high‐purity chiral radiation with reconfigurable emission direction. Spin‐selective radiators combined with a compound phase decoupling strategy suppress undesired components, while embedded PIN diodes allow real‐time directional control.
Lu Song +8 more
wiley +1 more source
Application of communications satellites to educational development [PDF]
A summary of research is presented. The broad objectives of this interdisciplinary research effort were: (1) to assess the role of satellite communications as a means of improving education in the United States, as well as in less-developed areas of the ...
Morgan, R. P.
core +1 more source
Physical Interpretation of Diffractive Optical Networks for High‐Dimensional Vortex Mode Sorting
Advanced Science, EarlyView.The first layer‐resolved physical interpretation of diffractive optical networks trained for high‐dimensional vortex mode sorting is presented, revealing transformation division phenomena linked to saturated performance as layer numbers increase. This analysis reconciles physical theorems with network operations, enabling physics‐driven design of ...
Ruitao Wu +7 more
wiley +1 more source
Death By A Thousand COTS: Disrupting Satellite Communications using Low Earth Orbit Constellations [PDF]
, 2022 Frederick Rawlins +2 more
openalex +1 more source
Compendium of Applications Technology Satellite user experiments [PDF]
The achievements of the user experiments performed with ATS satellites from 1967 to 1973 are summarized. Included are fixed and mobile point to point communications experiments involving voice, teletype and facsimile transmissions. Particular emphasis is
Engler, N. A. +2 more
core +1 more source
Advanced Science, EarlyView.To address the challenge of high electro‐optic (EO) activity and thermal stability, four chromophores (BHG1–BHG4) are designed. These incorporate steric hindrance groups into the aniline donor, significantly raising their glass transition temperatures and enhancing alignment stability. The neat BHG2 film achieves an exceptional EO coefficient of 304 pm
Changqing Ge +9 more
wiley +1 more source
ISAAC: Inflatable Satellite of an Antenna Array for Communications, volume 6 [PDF]
The results of a study to design an antenna array satellite using rigid inflatable structure (RIS) technology are presented. An inflatable satellite allows for a very large structure to be compacted for transportation in the Space Shuttle to the Space ...
Ashton, Patrick +7 more
core +1 more source
Advanced Science, EarlyView.The Rashba edge states at the step edges of Bi2Se3 display switching behavior, according to the functionalization and defunctionalization of step edges with Se atoms that are achieved by annealing in UHV and Se flux conditions, respectively. Abstract Quantum materials with novel spin textures from strong spin‐orbit coupling (SOC) are essential ...
Wonhee Ko +9 more
wiley +1 more source