Results 81 to 90 of about 351,550 (291)

The Cause and Eliminate Method of Self-excited Oscillation in Long Cable Amplifier Circuits

MATEC Web of Conferences, 2018
SMA long cable distributed capacitance is easy to trigger broadband amplifier circuit’s self-oscillation. In this study we design an amplifier circuit based on OPA691 chip, discuss the influence of long cable’s distributed capacitance, then prompt a ...
Wang Can, Huang Ming, Peng Zhaomin, Cui Jinbao   +3 more
doaj   +1 more source

Sustained Self‐Powered Real‐Time Vibration Monitoring Through Integrated Nonlinear Harvesting and Energy‐Aware Wireless Sensing

Advanced Science, EarlyView.
A self‐powered vibration sensing platform integrates a quasi‐zero‐stiffness piezoelectric harvester, synchronized electric charge extraction, energy management, and wireless ADC acquisition. Ambient vibration is simultaneously harvested as energy and digitized as information, enabling sustained real‐time waveform monitoring without external power.
Yizhou Li, Ye Zhang, Hao Tang, Yaozi Zheng, Yawei Wang, Chaoyang Zhao, Liwei Dong, Dewen Yu, Junlei Wang, Chunbo Lan, Guobiao Hu   +10 more
wiley   +1 more source

Fiscal Year 2020

, 2020
This Report is being provided by the The Governor’s Broadband Development Council. The report describes the progress of broadband development in unserved areas, the Council found that over 300,000 locations in Texas are unservedd.1 As of July 2020, an ...
Texas. Governor's Broadband Development Council
core  

Backward wave optical parametric oscillation in a waveguide

npj Nanophotonics
Backward wave oscillators represent a class of tunable sources of electromagnetic radiation that do not require a resonant cavity to satisfy the oscillation condition.
Patrick Mutter, Fredrik Laurell, Valdas Pasiskevicius, Andrius Zukauskas   +3 more
doaj   +1 more source

Engineering Ultrastable Intrinsic Radicals: Graphene Quantum Dots With NIR‐II Emission for Dynamic Deep‐Tissue Bioimaging

Advanced Science, EarlyView.
Stable radicals are attractive for photonic and quantum information technologies but are often limited by instability. We stabilize intrinsic radicals in graphene quantum dots via 2D polymerization of perylene derivatives, where bilayer defect confinement suppresses quenching (100–500 K).
Qin Xu, Yijie Hou, Bingzhe Wang, Tesen Zhang, Yupeng Liu, Shuaiqi Li, Maohua Chen, Guichuan Xing, Dongbo Guo, Songnan Qu   +9 more
wiley   +1 more source

Broadband diffusion in households of South Africa [PDF]

, 2011
Includes abstract.Includes bibliographical references (p. 272-281).This research attempts to investigate the adoption, use and impact of broadband services from a holistic point of view encompassing the factors influencing the adoption, use and impact of
Naidoo, Mogen
core   +1 more source

Sonoselective Transfection of Glioma Endothelium

Advanced Science, EarlyView.
Delivering non‐viral, gene‐bearing nanoparticles with thiol‐decorated surfaces to gliomas with focused ultrasound yields transfection tropism for endothelial cells. From this platform, “sonoselective” transfection of glioma endothelium is achieved via incorporation of an endothelial cell‐specific promoter.
Anna C. Debski, Catherine M. Gorick, Victoria R. Breza, Jackson Tirrell, Krishan Perumal, Katherine M. Nowak, Ji Song, Natasha D. Sheybani, Richard J. Price   +8 more
wiley   +1 more source

Semiannual oscillation, annual oscillation, quasibiennial oscillation, and solar cycle variation of the OH airglow emission in the mesopause region

Earth and Planetary Physics
The vertically integrated emission rate, centroid altitude, peak emission rate, and peak height of the hydroxyl (OH) airglow were calculated from Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED)/Sounding of the Atmosphere using ...
Sheng-Yang Gu, Dong Wang, YuSong Qin, Liang Tang, YaFei Wei, XianKang Dou   +5 more
doaj   +1 more source

Dipolar Coupling Errors in Nuclear Spin Qubits

Advanced Science, EarlyView.
Multi‐nuclear spin registers of phosphorus‐atom qubits in silicon have demonstrated 99.99% single and >$>$99.9% two qubit gate fidelities. Despite nanometer separation, read‐out fidelities between individual nuclear spins within the register are not identical.
I. D. Thorvaldson, P. Macha, J. Reiner, S. H. Misha, Y. Chung, L. Kranz, D. Keith, S. Monir, D. Poulos, S. Sutherland, Y.‐L. Hsueh, B. Thorgrimsson, R. Rahman, J. G. Keizer, S. K. Gorman, M. Y. Simmons   +15 more
wiley   +1 more source

μJ-level normal-dispersion fiber optical chirped-pulse parametric oscillator

Journal of the European Optical Society-Rapid Publications
We demonstrate the generation of broadband tunable and synchronized pulses exceeding the microjoule level using the new concept of Fiber Optical Parametric Chirped-Pulse Oscillation (FOPCPO).
Guezennec Tristan, Idlahcen Saïd, Cervera Armand, Hanzard Pierre-Henry, Landais David, Provino Laurent, Haboucha Adil, Godin Thomas, Hideur Ammar   +8 more
doaj   +1 more source