Results 141 to 150 of about 305,238 (305)
Choice of FDMA/SCPC access technique for aeronautical satellite voice system [PDF]
A worldwide aeronautical mobile satellite system is about to become operational. The system architecture and access methods have been debated extensively, resulting in the selection of Time Division Multiplexing/Time Division Multiple Access (TDM/TDMA ...
Smith, G. K.
core +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Yttrium doping was proposed to expand the bandgap and inhibit the oxygen vacancies of Ga2O3 to form (YGa)2O3 alloy with reduced background carriers and trap centers. Beneficially, simple vertical‐structured (YGa)2O3/FTO heterojunction photodetectors exhibit superb performance with particularly low dark current and fast photoresponse in both self‐driven
Zebin Zhou +8 more
wiley +1 more source
The communications technology satellite and the associated ground terminals for experiments [PDF]
General spacecraft operational characteristics of the Communications Technology Satellite are discussed with particular emphasis on communication system parameters. Associated used ground terminals are reviewed.
Day, J. W. B., Wright, D. L.
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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This review provides an overview of recent developments in metal organic framework (MOF)‐based and MOF‐derived composites for efficient oxygen evolution reaction. This review also emphasizes the structural design of electrocatalyst, active site optimization, and emerging prospects of their use in practical electrolyzer systems.
Bhagyashri B. Kamble +7 more
wiley +1 more source
Chinese space and aviation industries score major breakthroughs [PDF]
An overview of the current status of China's aviation and aerospace industries is presented, as well as planned future development and areas of importance for China's future space programs. The development of China's CZ-1, CZ-2 and CZ-3 rocket program is
Hu, R.
core +1 more source
A Novel Multilevel Conceptual Framework for Flood Risk Governance
Environmental Policy and Governance, EarlyView.ABSTRACT Globally, flood risk is increasing as climate change progresses. Contemporary flood risk management practice often utilises hydrodynamic modelling (for hazard risk assessments), social vulnerability assessments, and risk communications in silo, which fragments evidence‐based decision‐making for effective flood risk management. We hence develop
Aiperi Stambekova, Avidesh Seenath
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.
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Neural Network–Assisted Metasurface Retroreflector With Wide‐Angle Adaptivity
Electron, EarlyView.This work proposes a wide‐angle, multi‐polarization, self‐sensing, and self‐adaptive intelligent metasurface retroreflector, with a planar profile and ultrathin thickness. By integrating a pre‐trained artificial neural network (ANN), the metasurface retroreflector can recognize the incident angle and promptly adapt to changes in the incoming wave.
Jing Ning +7 more
wiley +1 more source
Experimental L-band SST satellite communications/surveillance terminal study. Volume 4 - Aircraft antenna studies [PDF]
Antenna requirements for supersonic transport satellite communications ...
Carman, D. M., Kiskaddon, W. V.
core +1 more source
ZnO Nanowires by Chemical Bath Deposition: A Review on Doping and Functional Devices
Electron, EarlyView.This review reports the most recent and well‐established state‐of‐the‐art and scientific challenges related to the doping of ZnO nanowires by chemical bath deposition, encompassing native point and hydrogen‐related defects, as well as extrinsic dopants.
Clément Lausecker +3 more
wiley +1 more source