Results 141 to 150 of about 4,280,970 (334)

Task allocation in dynamic networks of satellites

open access: yes, 2011
The management of distributed satellite systems requires the coordination of a large number of heterogeneous spacecraft. Task allocation in such a system is complicated by limited communication and individual satellite dynamics.
Noble, Jason, Van Der Horst, Johannes
core  

Freeform Manufacturing of Plant‐Based Structural Colors for Scalable Photonic and Mechanochromic Devices

open access: yesAdvanced Materials, EarlyView.
A green, freeform manufacturing approach that utilizes robust aqueous two‐phase systems to create intricate and scalable photonic structures and non‐planar mechanochromic hydrogel actuators from plant‐based hydroxypropyl cellulose. This approach broadens the structural possibilities of sustainable photonic devices and mechanochromic systems, offering ...
Xiao Song   +14 more
wiley   +1 more source

Satellite communication and navigation for mobile users [PDF]

open access: yes
Efforts made to utilize space technology for solving communication and navigation problems faced by mobile users in earth orientated situations are outlined.
Bernstein, S. L.
core   +1 more source

Validation of the communications link analysis and simulation system (CLASS) [PDF]

open access: yes, 1985
CLASS (Communication Link Analysis and Simulation System) is a software package developed for NASA to predict the communication and tracking performance of the Tracking and Data Relay Satellite System (TDRSS) services.
Braun, W. R., Mckenzie, T. M.
core   +1 more source

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

open access: yesAdvanced Materials Technologies, EarlyView.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim   +4 more
wiley   +1 more source

Technology requirements for communication satellites in the 1980's [PDF]

open access: yes
The key technology requirements are defined for meeting the forecasted demands for communication satellite services in the 1985 to 1995 time frame. Evaluation is made of needs for services and technical and functional requirements for providing services.
Burtt, J. E.   +5 more
core   +1 more source

Laser Micromachining of Liquid Metal Patterns for Stretchable Electronic Circuits

open access: yesAdvanced Materials Technologies, EarlyView.
A cleanroom‐free fabrication strategy combines UV‐laser micromachining with a copper foil wetting layer to rapidly produce high resolution, liquid metal based stretchable electronic circuits on diverse substrates. The scalable, maskless process enables complex circuit designs (<$<$3 h, ∼$\sim$15/device) with excellent electrical stability under strain,
Merjen Palvanova   +3 more
wiley   +1 more source

Possible application of remote-sensing techniques and satellite communications for earthquake studies [PDF]

open access: yes
Passive and active remote sensing techniques used with satellite communication for earthquake ...
Slemmons, D. B., Wallace, R. E.
core   +1 more source

Enhancing satellite & terrestrial networks integration through NFV/SDN technologies [PDF]

open access: yes, 2015
NFV and SDN technologies can become key facilitators for the combination of terrestrial and satellite networks. Enabling NFV into the SatCom domain will provide operators with appropriate tools and interfaces in order to establish end-to-end fully ...
Agapiou, George   +10 more
core   +1 more source

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