Results 51 to 60 of about 22,036 (272)
Time- and Power-Splitting Strategies for Ambient Backscatter System
IEEE Access, 2019 An ambient backscatter system could utilize the exiting ambient RF signals as both energy source and information carrier to enable the communications among battery-free devices and is deemed as a promising communication primitive for the Internet of ...
Zhe Ma +6 more
doaj +1 more source
Sol–Gel Derived Polymer Precursors for Stereolithography of ZrC
Advanced Engineering Materials, EarlyView.ZrC is a critical material target for extreme temperature conditions. This report describes a protocol for preparing ZrC ceramics via stereolithography and examines the impact of the polymer matrix on carbothermal reduction and mechanical stability of 3D printed ZrC.
Charles J. Rafalko +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm +6 more
wiley +1 more source
Atmosphere, 2017 Simple analytical approximations for aerosol radiative forcing generally contain the aerosol upscatter fraction (the fraction of scattered light that is scattered into the upper hemisphere), while ambient measurements generally yield the backscatter ...
Hans Moosmüller, John A. Ogren
doaj +1 more source
Advanced Engineering Materials, EarlyView.EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk +7 more
wiley +1 more source
Signal Detection in Ambient Backscatter Systems: Fundamentals, Methods, and Trends
IEEE Access, 2023 Internet-of-Things (IoT) is rapidly growing in wireless technology, aiming to connect vast numbers of devices to gather and distribute vital information.
Shayan Zargari +4 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold +2 more
wiley +1 more source
Outage analysis for multi‐BD symbiotic radio system
IET Communications, 2022 Symbiotic radio (SR) is a new spectrum sharing paradigm that allows backscatter device (BD) to transmit information over the ambient radio frequency signal, where the BD is parasitic in the primary transmission, and the secondary system (i.e. backscatter
Dan Zhang, Qi Zhu
doaj +1 more source
Capacity Analysis for Tunnel Diode Amplifier Assisted Ambient Backscatter Communications
IEEE Access, 2022 Ambient backscatter communication (AmBC) addresses connectivity, cost, and congestion bottlenecks for the Internet of Things (IoT) deployment. AmBC, by avoiding a dedicated power infrastructure and carrier emitter, allows tags to communicate by simply ...
Ziqi Cui +4 more
doaj +1 more source
Throughput Maximization for UAV-Aided Backscatter Communication Networks [PDF]
, 2019 This paper investigates unmanned aerial vehicle (UAV)-aided backscatter communication (BackCom) networks, where the UAV is leveraged to help the backscatter device (BD) forward signals to the receiver.
Hua, M +4 more
core +2 more sources