The INFITA low-frequency pulse physiotherapeutic device

1994 ◽  
Vol 28 (5) ◽  
pp. 284-287
Author(s):  
A. Yu. Zaslavskii ◽  
G. S. Markarov
Keyword(s):  
Low Frequency ◽  
Frequency Pulse

High‐power‐factor dimmable LED driver with low‐frequency pulse‐width modulation

2016 ◽  
Vol 9 (10) ◽  
pp. 2139-2146 ◽  
Author(s):  
Hung‐Liang Cheng ◽  
Yong‐Nong Chang ◽  
Chun‐An Cheng ◽  
Chien‐Hsuan Chang ◽  
Yu‐Hung Lin
Keyword(s):  
Power Factor ◽  
High Power ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Frequency ◽  
Led Driver ◽  
High Power Factor ◽  
Frequency Pulse

Spike-timing-dependent plasticity model for low-frequency pulse waveform

2019 ◽  
Vol 24 (4) ◽  
pp. 452-459
Author(s):  
Masaya Ohara ◽  
Minami Kaneko ◽  
Fumio Uchikoba ◽  
Ken Saito
Keyword(s):  
Low Frequency ◽  
Spike Timing ◽  
Plasticity Model ◽  
Pulse Waveform ◽  
Spike Timing Dependent Plasticity ◽  
Dependent Plasticity ◽  
Frequency Pulse

The effect of low frequency pulse-shaped substrate bias on the remote plasma deposition of a-Si : H thin films

2009 ◽  
Vol 19 (1) ◽  
pp. 015012 ◽  
Author(s):  
I T Martin ◽  
M A Wank ◽  
M A Blauw ◽  
R A C M M van Swaaij ◽  
W M M Kessels ◽  
...  
Keyword(s):  
Thin Films ◽  
Plasma Deposition ◽  
Low Frequency ◽  
Substrate Bias ◽  
Remote Plasma ◽  
Frequency Pulse

scholarly journals From unspecific to adjusted, how the BOLD response in the rat hippocampus develops during consecutive stimulations

2016 ◽  
Vol 37 (2) ◽  
pp. 590-604 ◽  
Author(s):  
Stephanie Riemann ◽  
Cornelia Helbing ◽  
Frank Angenstein
Keyword(s):  
High Frequency ◽  
Pulse Sequences ◽  
Low Frequency ◽  
Bold Response ◽  
Deconvolution Analysis ◽  
Bold Responses ◽  
Electrical Pulses ◽  
Stimulation Period ◽  
Frequency Pulse ◽  
Spiking Activity

To determine the possibility to deconvolve measured BOLD responses to neuronal signals, the rat perforant pathway was electrically stimulated with 10 related stimulation protocols. All stimulation protocols were composed of low-frequency pulse sequences with superimposed high-frequency pulse bursts. Because high-frequency pulse bursts trigger only one synchronized spiking of granular cells, variations of the stimulation protocol were used: (a) to keep the spiking activity similar during the presentation of different numbers of pulses, (b) to apply identical numbers of pulses to induce different amounts of spiking activity, and (c) to concurrently vary the number of applied electrical pulses and resultant spiking activity. When complex pulse sequences enter the hippocampus, an unspecific default-like BOLD response is first generated, which relates neither to the number of incoming pulses nor to the induced spiking activity. Only during subsequent stimulations does the initial unspecific response adjust to a more adequate response, which in turn either strongly related to spiking activity when low-frequency pulses were applied or depended on the incoming activity when high-frequency pulse bursts were presented. Thus, only the development of BOLD responses during repetitive stimulations can predict the underlying neuronal activity and deconvolution analysis should not be performed during an initial stimulation period.

scholarly journals The Application of Low-Frequency Transition in the Assessment of the Second-Order Zeeman Frequency Shift

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8333
Author(s):  
Yang Bai ◽  
Xinliang Wang ◽  
Junru Shi ◽  
Fan Yang ◽  
Jun Ruan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Frequency Shift ◽  
Low Frequency ◽  
Pulse Signal ◽  
Second Order ◽  
Magnetic Field Measurement ◽  
Central Frequency ◽  
Zeeman Frequency ◽  
The Magnetic Field ◽  
Frequency Pulse

Second-order Zeeman frequency shift is one of the major systematic factors affecting the frequency uncertainty performance of cesium atomic fountain clock. Second-order Zeeman frequency shift is calculated by experimentally measuring the central frequency of the (1,1) or (−1,−1) magnetically sensitive Ramsey transition. The low-frequency transition method can be used to measure the magnetic field strength and to predict the central fringe of (1,1) or (−1,−1) magnetically sensitive Ramsey transition. In this paper, we deduce the formula for magnetic field measurement using the low-frequency transition method and measured the magnetic field distribution of 4 cm inside the Ramsey cavity and 32 cm along the flight region experimentally. The result shows that the magnetic field fluctuation is less than 1 nT. The influence of low-frequency pulse signal duration on the accuracy of magnetic field measurement is studied and the optimal low-frequency pulse signal duration is determined. The central fringe of (−1,−1) magnetically sensitive Ramsey transition can be predicted by using a numerical integrating of the magnetic field “map”. Comparing the predicted central fringe with that identified by Ramsey method, the frequency difference between these two is, at most, a fringe width of 0.3. We apply the experimentally measured central frequency of the (−1,−1) Ramsey transition to the Breit-Rabi formula, and the second-order Zeeman frequency shift is calculated as 131.03 × 10−15, with the uncertainty of 0.10 × 10−15.

scholarly journals Low-frequency pulse profile variation in PSR B2217+47: evidence for echoes from the interstellar medium

2018 ◽  
Vol 476 (2) ◽  
pp. 2704-2716 ◽  
Author(s):  
D Michilli ◽  
J W T Hessels ◽  
J Y Donner ◽  
J-M Grießmeier ◽  
M Serylak ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Low Frequency ◽  
Pulse Profile ◽  
Profile Variation ◽  
Frequency Pulse
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