Results 151 to 160 of about 1,581,787 (389)

Complex Structured Light Generation Using Printed Liquid Crystal Droplets

open access: yesAdvanced Optical Materials, EarlyView.
Inkjet‐printed liquid crystal droplets generate structured light beams with spatially varying polarization and phase. These include full Poincaré beam, vortex beam carrying orbital angular momentum, and beam with polarization singularities, offering a simple approach for compact structured light generation in optical manipulation, imaging, and ...
Xuke Qiu   +12 more
wiley   +1 more source

Partially adaptive baeam-forming maethods based on genetic algorithms

open access: yesTongxin xuebao, 2006
An improved genetic algorithm(GA) for real time beam-forming of onboard planar array was presented. In or-der to meet the real-time processing requirements, this GA was combined with partially adaptive beam-forming tech-niques in the phase-only adaptive ...
JIN Jun1, WANG Hua-li1, LIU Miao2
doaj  

The applications of satellites to communications, navigation and surveillance for aircraft operating over the contiguous United States. Volume 1 - Technical report [PDF]

open access: yes
Satellite applications to aircraft communications, navigation, and surveillance over US including synthesized satellite network and aircraft equipment for air traffic ...
Craigie, J. H.   +3 more
core   +1 more source

Fast and Reversible Red Emission Modulation in Photoswitchable Molecules Toward Optical Data Storage

open access: yesAdvanced Optical Materials, EarlyView.
A series of intense red‐emitting BTCPO4 photoswitches is synthesized, and their photophysical properties, such as fluorescence quantum yield, fatigue resistance, and reversible cyclization, are reported. The issue of slow reverse cyclization, which hinders fluorescence modulation (ON‐OFF) of these molecules, is overcome by utilizing energy transfer to ...
Pankaj Dharpure   +6 more
wiley   +1 more source

Seven Years Experience and Analysis on Corporated-Wide Distance Learning for Engineers Using Satellite Communications [PDF]

open access: bronze, 1999
Kouji Yoshida   +5 more
openalex   +1 more source

ISAAC: Inflatable Satellite of an Antenna Array for Communications, volume 6 [PDF]

open access: yes
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

Directional Light Scattering In Mie‐Resonant Si Particles With Ultra‐Thin Au Shells

open access: yesAdvanced Optical Materials, EarlyView.
Si@Au core‐shell particles have been produced to study their ability to directionally scatter light. We found that the heavily reported particulate shells do not overlap the electric and magnetic dipoles well, where continuous shells have better overlap. Experimental analyses, including nanomaterial characterization, EELS and single‐particle dark‐field
Emmanuel O. Idowu   +12 more
wiley   +1 more source

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