Results 21 to 30 of about 1,293,707 (300)

Causal evidence that intrinsic beta frequency is relevant for enhanced signal propagation in the motor system as shown through rhythmic TMS [PDF]

open access: yes, 2016
Correlative evidence provides support for the idea that brain oscillations underpin neural computations. Recent work using rhythmic stimulation techniques in humans provide causal evidence but the interactions of these external signals with intrinsic ...
Brooks, Joseph L.   +16 more
core   +1 more source

Brainstem speech encoding is dynamically shaped online by fluctuations in cortical α state

open access: yesNeuroImage, 2022
Experimental evidence in animals demonstrates cortical neurons innervate subcortex bilaterally to tune brainstem auditory coding. Yet, the role of the descending (corticofugal) auditory system in modulating earlier sound processing in humans during ...
Jesyin Lai   +2 more
doaj   +1 more source

Analysis of the dynamic responses of SOA wavelength converters using linear frequency resolved gating technique [PDF]

open access: yes, 2008
This letter demonstrates the applicability of the linear frequency resolved optical gating technique for the complete characterization of the fast dynamic response of semiconductor optical amplifiers (SOAs) when operating as wavelength converters.
Perez-Pardo, A.   +4 more
core   +1 more source

Fractional-Order Phase Shifters with Constant Magnitude Frequency Responses

open access: yesElektronika ir Elektrotechnika, 2019
This contribution presents and experimentally analyzes the idea how to reach the constant magnitude as well as the phase response in the fractional-order (FO) phase when shifting two-ports.
Roman Sotner   +4 more
doaj   +1 more source

Off-broadside main beam design for frequency invariant beamformers [PDF]

open access: yes, 2008
In a previously proposed design method for frequency invariant beamforming, the design for the case of an off-broadside main beam is not satisfactory.
Stephan Weiss   +3 more
core   +1 more source

Frequency-Hopping Wave Engineering with Metasurfaces

open access: yes, 2023
Wave phenomena can be artificially engineered by scattering from metasurfaces, which aids in the design of radio-frequency and optical devices for wireless communication, sensing, imaging, wireless power transfer and bio/medical applications.
Daisuke Nita (16541400)   +4 more
core   +1 more source

DESIGN OF BAND-PASS FILTERS WITH NON-EQUIRIPPLE FREQUENCY RESPONSES

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2019
Introduction. Band-pass filters circuit elements can be calculated by converting low-pass filter (LPF) parameters, which is the prototype of the designed band-pass filter.
Evgeniy N. Chervinskiy
doaj   +1 more source

Step response and frequency response methods

open access: yesAutomatica, 1979
Abstract In this tutorial very simple methods will be presented by which models for dynamic processes can be obtained. These methods employ step responses of the process or responses to other nonperiodic testsignals or process responses to periodic signals.
openaire   +1 more source

Design of frequency invariant beamformer for broadband arrays

open access: yes, 2007
A simple method for the design of a class of arrays with frequency invariant beam patterns is proposed. Starting from the desired frequency invariant beam pattern of an n-D array, the proposed method uses a series of substitutions and an n-D inverse ...
Weiss, Stephan   +5 more
core   +1 more source

Spatial Frequency Discrimination of Band-limited Periodic Targets: Effects of Stimulus Contrast, Bandwidth and Retinal Eccentricity [PDF]

open access: yes, 1992
Two experiments were conducted to explore the ability of human observers to discriminate the spatial frequency of briefly-presented, Gaussian-truncated sinewave gratings.
Greenlee, Mark W.
core   +1 more source

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