Street‐scale mapping of urban radio frequency noise at very high frequency and ultra high frequency

A closed-loop system for the automated detection and control of epileptic seizures was created and tested in three Genetic Absence Epilepsy Rats from Strasbourg (GAERS) rats. In this preliminary study, a set of four EEG features were used to detect seizures and three different electrical stimulation strategies (standard (130 Hz), very high (500 Hz) and ultra high (1000 Hz)) were delivered to terminate seizures. Seizure durations were significantly shorter with all three stimulation strategies when compared to non-stimulated (control) seizures. We used mean seizure duration of epileptiform discharges persisting beyond the end of electrical stimulation as a measure of stimulus efficacy. When compared to the duration of seizures stimulated in the standard approach (7.0 s ± 10.1), both very high and ultra high frequency stimulation strategies were more effective at shortening seizure durations (1.3 ± 2.2 s and 3.5 ± 6.4 s respectively). Further studies are warranted to further understand the mechanisms by which this therapeutic effect may be conveyed, and which of the novel aspects of the very high and ultra high frequency stimulation strategies may have contributed to the improvement in seizure abatement performance when compared to standard electrical stimulation approaches.

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Effect of Driving Frequency on Growth and Structure of Silicon Films Deposited by Radio-Frequency and Very-High-Frequency Magnetron Sputtering

ECS Journal of Solid State Science and Technology ◽

10.1149/2.008405jss ◽

2014 ◽

Vol 3 (5) ◽

pp. Q74-Q78 ◽

Cited By ~ 13

Author(s):

Haijie He ◽

Chao Ye ◽

Xiangying Wang ◽

Fupei Huang ◽

Yi Liu

Keyword(s):

Magnetron Sputtering ◽

Radio Frequency ◽

High Frequency ◽

Silicon Films ◽

Driving Frequency ◽

Very High Frequency ◽

Very High

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Plasma Impedance Characteristics of Radio Frequency and Very High-Frequency Magnetron Discharges

IEEE Transactions on Plasma Science ◽

10.1109/tps.2019.2958317 ◽

2020 ◽

Vol 48 (1) ◽

pp. 99-103

Author(s):

Xiyue Liu ◽

Chao Ye ◽

Xiangying Wang ◽

Su Zhang ◽

Min Zhu ◽

...

Keyword(s):

Radio Frequency ◽

High Frequency ◽

Very High Frequency ◽

Impedance Characteristics ◽

Plasma Impedance ◽

Very High

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Very-High-Frequency and Ultra-High-Frequency Signal Ranges as Limited by Noise and Co-channel Interference

Proceedings of the IRE ◽

10.1109/jrproc.1947.231239 ◽

1947 ◽

Vol 35 (2) ◽

pp. 128-136 ◽

Cited By ~ 5

Author(s):

E.W. Allen

Keyword(s):

High Frequency ◽

Very High Frequency ◽

Frequency Signal ◽

High Frequency Signal ◽

Ultra High Frequency ◽

Channel Interference ◽

Very High

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Использование высокочастотной шумоподобной модуляции для снижения дрейфовых процессов в LiNbO-=SUB=-3-=/SUB=--фазовом модуляторе волоконно-оптического гироскопа

Письма в журнал технической физики ◽

10.21883/pjtf.2020.19.50036.18330 ◽

2020 ◽

Vol 46 (19) ◽

pp. 11

Author(s):

Е.В. Востриков ◽

Д.А. Погорелая ◽

А.Н. Никитенко ◽

А.С. Алейник

Keyword(s):

High Frequency ◽

Fiber Optic ◽

Noise Signal ◽

Frequency Noise ◽

Phase Modulator ◽

Fiber Optic Gyroscope ◽

Frequency Range ◽

Very High Frequency ◽

High Frequency Noise ◽

Very High

In this paper, the phase modulator optical phase drift reduction method is proposed and researched for LiNbO3 multi-functional integrated optical chip as a part of a fiber-optic gyroscope. This approach consists of applying a very high-frequency noise signal to a phase modulator in the range from 20 MHz to 100 MHz, which is outside of a fiber-optic gyroscope operating frequency range. The presented method showed that the increase in very high-frequency noise signal voltage up to around 1.7 half-wave voltages of the phase modulator allows decreasing optical phase drift by more than 4 times in the frequency range below 64.5 kHz.

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