Results 1 to 10 of about 27,516 (271)

On the Optimization of Spread Spectrum Chirps Into Arbitrary Position and Width Pulse Signals. Application to Ultrasonic Sensors and Systems

IEEE Access, 2022
This work presents in detail a new method for the optimization of rectangular spread spectrum excitation signals for its use in simple and low-cost ultrasonic pulsers, but that could be extended to other applications based on spread spectrum signals ...
A. Rodriguez-Martinez, L. Svilainis, M. A. De La Casa-Lillo, T. G. Alvarez-Arenas, A. Aleksandrovas, A. Chaziachmetovas, A. Salazar   +6 more
doaj   +1 more source

Nonlinear-dispersive similariton of passive fiber [PDF]

Journal of the European Optical Society-Rapid Publications, 2009
Using the spectral-interferometry method for the short pulse complete characterization, we demonstrate the nature and distinctive properties of the similariton generated in single-mode fiber without gain (passive fiber) due to the combined impacts of ...
Zeytunyan A., Yesayan G., Mouradian L., Kockaert P., Emplit Ph., Louradour F., Barthélémy A.   +6 more
doaj   +1 more source

Influence of Two-Frequency Radiation Intensity Fluctuations on the Output Signal of a Vortex Optical Fiber Forming OAM Address in Polyharmonic Sensor Technology

Photonics, 2021
A schematic diagram of a RoF radio-optic system with vortex signals is presented, in which the radio frequency is determined by the difference between the wavelengths of two lasers.
Irina Vinogradova, Azat Gizatulin, Ivan Meshkov, Valery Bagmanov, Oleg Morozov, Ildaris Gabdulkhakov, Sofia Ganchevskaya, Nikolay Kazanskiy, Albert Sultanov   +8 more
doaj   +1 more source

Divergence gating towards far-field isolated attosecond pulses

New Journal of Physics, 2022
Divergence gating, a novel method to generate far-field isolated attosecond pulses (IAPs) through controlling divergences of different pulses, is proposed and realized by relativistic chirped laser–plasma interactions.
Yi Zhang, Conglin Zhong, Shaoping Zhu, Xiantu He, Bin Qiao   +4 more
doaj   +1 more source

Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

Applied Sciences, 2021
The use of pulse-compression in ultrasonic non-destructive testing has assured, in various applications, a significant improvement in the signal-to-noise ratio.
Muhammad Khalid Rizwan, Stefano Laureti, Hubert Mooshofer, Matthias Goldammer, Marco Ricci   +4 more
doaj   +1 more source

Comparing Performances of Five Distinct Automatic Classifiers for Fin Whale Vocalizations in Beamformed Spectrograms of Coherent Hydrophone Array

Remote Sensing, 2020
A large variety of sound sources in the ocean, including biological, geophysical, and man-made, can be simultaneously monitored over instantaneous continental-shelf scale regions via the passive ocean acoustic waveguide remote sensing (POAWRS) technique ...
Heriberto A. Garcia, Trenton Couture, Amit Galor, Jessica M. Topple, Wei Huang, Devesh Tiwari, Purnima Ratilal   +6 more
doaj   +1 more source

Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers

Frontiers in Physics, 2019
This paper examines the impact of non-linear longitudinal phase distortions on the spectral bandwidth in echo seeded free electron lasers (FELs). It extends the existing theory developed in Hemsing [1] for echo-enabled harmonic generation (EEHG) to ...
Erik Hemsing
doaj   +1 more source

A Single Short ‘Tone Burst’ Results in Optimal Drug Delivery to Tumours Using Ultrasound-Triggered Therapeutic Microbubbles

Pharmaceutics, 2022
Advanced drug delivery systems, such as ultrasound-mediated drug delivery, show great promise for increasing the therapeutic index. Improvements in delivery by altering the ultrasound parameters have been studied heavily in vitro but relatively little in
Nicola Ingram, Laura E. McVeigh, Radwa H. Abou-Saleh, Damien V. B. Batchelor, Paul M. Loadman, James R. McLaughlan, Alexander F. Markham, Stephen D. Evans, P. Louise Coletta   +8 more
doaj   +1 more source

Auditory EEG Biomarkers in Fragile X Syndrome: Clinical Relevance

Frontiers in Integrative Neuroscience, 2019
Sensory hypersensitivities are common and distressing features of Fragile X Syndrome (FXS). While there are many drug interventions that reduce behavioral deficits in Fmr1 mice and efforts to translate these preclinical breakthroughs into clinical trials
Lauren E. Ethridge, Lauren E. Ethridge, Lisa A. De Stefano, Lauren M. Schmitt, Lauren M. Schmitt, Nicholas E. Woodruff, Kara L. Brown, Morgan Tran, Jun Wang, Ernest V. Pedapati, Ernest V. Pedapati, Ernest V. Pedapati, Craig A. Erickson, Craig A. Erickson, John A. Sweeney   +14 more
doaj   +1 more source

ANALYSIS OF RADIO SIGNAL PARAMETERS FOR EMISSION SOURCE IDENTIFICATION

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2020
The purpose of the article is the need to create a single portrait of a radioemission source and identification methods. Radiomonitoring tools are used to detect, identify and locate sources of radioemission in the coverage area.
D. V. Arkhipenkov
doaj   +1 more source