Results 1 to 10 of about 2,813,006 (349)

Validation of non-invasive cerebrovascular pressure reactivity and pulse amplitude reactivity indices in traumatic brain injury. [PDF]

Acta Neurochir (Wien), 2020
Background Two transcranial Doppler (TCD) estimators of cerebral arterial blood volume (CaBV) coexist: continuous outflow of arterial blood outside the cranium through a low-pulsatile venous system (continuous flow forward, CFF) and pulsatile outflow ...
Calviello LA, Czigler A, Zeiler FA, Smielewski P, Czosnyka M.   +4 more
europepmc   +2 more sources

A pilot study on the programming protocol of vagus nerve stimulation in children with drug‐resistant epilepsy: High pulse amplitude or high duty cycle [PDF]

Epilepsia Open
Objective To compare the efficacy and safety of vagus nerve stimulation using different modes in patients with drug‐resistant epilepsy (DRE). Methods Children with DRE who underwent vagus nerve stimulator implantation between March 2019 and December 2022
Yuying Pan, Han Xie, Jiayi Ma, Taoyun Ji, Qingzhu Liu, Lixin Cai, Yuwu Jiang, Kai Zhang, Jianguo Zhang, Ye Wu   +9 more
doaj   +2 more sources

Validation of Pressure Reactivity and Pulse Amplitude Indices against the Lower Limit of Autoregulation, Part I: Experimental Intracranial Hypertension. [PDF]

J Neurotrauma, 2018
The purpose of this study was to provide validation of intracranial pressure (ICP) derived continuous indices of cerebrovascular reactivity against the lower limit of autoregulation (LLA).
Zeiler FA, Donnelly J, Calviello L, Lee JK, Smielewski P, Brady K, Kim DJ, Czosnyka M.   +7 more
europepmc   +2 more sources

Direct Detection of Bipolar Pulse Amplitude Modulation

Journal of Lightwave Technology, 2020
Pulse amplitude modulation (PAM) is a widely employed digital modulation format. PAM formats are generally classified as bipolar PAM (BPAM) if using both positive and negative amplitude levels, and unipolar PAM (UPAM) if using only non-negative amplitude
M. Secondini, E. Forestieri
semanticscholar   +3 more sources

Laser-sound reproduction by pulse amplitude modulation audio streams [PDF]

Scientific Reports
Recently, the possibility to reproduce complex continuous acoustic signals via pulsed laser-plasma sound sources was demonstrated. This was achieved by optoacoustic transduction of dense laser pulse trains, modulated via single- or multi-bit Sigma–Delta,
Konstantinos Kaleris, Panagiotis Hatziantoniou, Bjoern Stelzner, Dimosthenis Trimis   +3 more
doaj   +2 more sources

Analog Pulse Shape Discrimination Based on Time Duration and Pulse Height [PDF]

EPJ Web of Conferences, 2021
Pulse shape discrimination is a name of a group of techniques used to detect and distinguish between different types of radiation interactions.
Harn R., Osovizky A., Kadmon Y., Manor A., Ghelman M.   +4 more
doaj   +1 more source

Characterization of Preliminary Breakdown Pulse Trains in Negative Cloud-To-Ground Flashes Recorded during A Rainy Season in The Bogota Savannah, Colombia

TecnoLógicas, 2022
Lightning-generated electric field measurement is used to characterize cloud-to-ground (CG) flashes. Prior to the first return stroke (FRS), these signals sometimes exhibit a pulse train, known as preliminary breakdown pulses (PBP), whose study provides ...
Camilo A. Granados, Herbert E. Rojas, Francisco J. Román   +2 more
doaj   +1 more source

A pulse amplitude modulation scheme based on in-line semiconductor optical amplifiers (SOAs) for optical soliton systems

, 2021
The objective of this work is to simulate a pulse amplitude modulation (PAM) scheme based on in-line semiconductor optical amplifiers for optical soliton systems. The max.
A. Alatwi, A. Rashed
semanticscholar   +1 more source

Assessment of the unsteady performance of a turbocharger radial turbine under pulsating flow conditions: Parametric study and modeling

Energy Conversion and Management: X, 2022
A characteristic of radial turbines for turbocharger applications subject to pulsating flow is the deviation of the turbine performance compared with corresponding continuous flow conditions, typically associated with gas-stand experiments.
Roberto Mosca, Mihai Mihaescu
doaj   +1 more source

Suppression of postpulse oscillations in active bow-tie antennas [PDF]

Радиофизика и электроника, 2021
Subject and Purpose. This theoretical and experimental research is devoted to peculiarities of the ultra-wide bandwidth (UWB) pulse radiation from active bow-tie dipoles.
O.A. Orlenko, L.A. Varyanytsya-Roshchupkina, G.P. Pochanin, S.O. Masalov, V.G. Korzh   +4 more
doaj   +1 more source