Results 141 to 150 of about 2,844,522 (254)
, 1986 A two-step approach to wavefront sensing for the Large Deployable Reflector (LDR) was examined as part of an effort to define wavefront-sensing requirements and to determine particular areas for more detailed study.
Tubbs, Eldred F.
core
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner +5 more
wiley +1 more source
Wavefront sensor and method of reconstructing distorted wavefronts
, 2017 A wavefront sensor includes a mask and a sensor utilized to capture a diffraction pattern generated by light incident to the mask. A reference image is captured in response to a plane wavefront incident on the mask, and another measurement image is ...
Wang, Congli +3 more
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Spaceborne Distributed Array Processing for Precision Source Localization
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT Satellite‐based signals intelligence and spectrum sensing increasingly rely on low‐latency signal localization. However, operational processing chains often remain ground‐based, stressing feeder links and limiting scalability as constellations grow.
Dany Mestas +4 more
wiley +1 more source
Quantitative phase imaging based on holography: trends and new perspectives
Light: Science & ApplicationsIn 1948, Dennis Gabor proposed the concept of holography, providing a pioneering solution to a quantitative description of the optical wavefront.
Zhengzhong Huang, Liangcai Cao
doaj +1 more source
Smart Molecules, EarlyView.Nonthermal ultrasound transforms acoustic energy into diverse therapeutic bioeffects through cavitation, mechanical stimulation, and physicochemical activation. This review discusses how acoustic parameters, biological mechanisms, and responsive materials interact to influence nonthermal ultrasound‐enabled cancer therapies. Mechanism‐guided engineering
Liu Wang +5 more
wiley +1 more source
Liquid Phase Backscattered Scanning Electron Microscopy of Bacillus subtilis Spores
Small Methods, EarlyView.Graphene encapsulation enables liquid‐phase BSE‐SEM to visualize subsurface architecture of whole, hydrated Bacillus subtilis spores without staining. This approach is applied to visualize dormant spores and subsequent structural changes during spore germination, while imaging across a range of beam energies and Monte Carlo simulations provide a ...
Jack Bromley +8 more
wiley +1 more source
A Study of Wavefront Measurement Applied to the Coupling between Lasers and Fibers
, 2008 We have proposed and demonstrated a technique for the measurement of the wavefront of a diode laser beam with a large dynamic range. Our technique is a modified version of Hartmann and Shack-Hartmann wavefront sensor.
Lu, Yu-Kuan
core
Safety Science and Technology, EarlyView.Molten aluminum–water explosion triggered by leakage remains the core unresolved safety hazard hindering safe production in aluminum direct chill casting. This review summarizes its explosion mechanism, key influencing factors, prevention technologies, existing gaps, and prospects of intelligent multi‐technology integrated explosion‐proof systems ...
Min Wang +5 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source