Results 11 to 20 of about 97,587 (315)
EURASIP Journal on Advances in Signal Processing, 2019 In active sonar systems, the detection of echo from targets can deteriorate due to reverberation. Detection becomes more difficult if targets have low-Doppler frequency and are located near the reverberation band, especially in an environment with low ...
Seokjin Lee, Jun-seok Lim
doaj +2 more sources
The NICER “Reverberation Machine”: A Systematic Study of Time Lags in Black Hole X-Ray Binaries [PDF]
Astrophysical Journal, 2022 We perform the first systematic search of all NICER archival observations of black hole (and candidate) low-mass X-ray binaries for signatures of reverberation.
Jingyi Wang +14 more
semanticscholar +1 more source
Deeply Subwavelength Localization with Reverberation-Coded Aperture. [PDF]
Physical Review Letters, 2021 Accessing subwavelength information about a scene from the far-field without invasive near-field manipulations is a fundamental challenge in wave engineering.
Michael del Hougne +2 more
semanticscholar +1 more source
Journal of The Audio Engineering Society, 2023 For computational efficiency, acoustic simulation of late reverberation can be simplified by generating a limited number of incoherent signals with frequency-dependent exponential decay radiated by spatially distributed virtual reverberation sources (VRS)
C. Kirsch +4 more
semanticscholar +1 more source
The Sloan Digital Sky Survey Reverberation Mapping Project: Estimating Masses of Black Holes in Quasars with Single-epoch Spectroscopy [PDF]
Astrophysical Journal, 2020 It is well known that reverberation mapping of active galactic nuclei (AGNs) reveals a relationship between AGN luminosity and the size of the broad-line region, and that use of this relationship, combined with the Doppler width of the broad emission ...
E. Bontà +23 more
semanticscholar +1 more source
A dynamic black hole corona in an active galaxy through X-ray reverberation mapping [PDF]
Nature Astronomy, 2020 X-ray reverberation echoes are assumed to be produced in the strongly distorted spacetime around accreting supermassive black holes. This signal allows us to spatially map the geometry of the inner accretion flow 1 , 2 —a region that cannot yet be ...
W. Alston +20 more
semanticscholar +1 more source
IEEE Transactions on Medical Imaging, 2021 Diffuse reverberation is ultrasound image noise caused by multiple reflections of the transmitted pulse before returning to the transducer, which degrades image quality and impedes the estimation of displacement or flow in techniques such as elastography
Leandra L. Brickson +3 more
semanticscholar +1 more source
Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei [PDF]
, 1999 Correlated variations in the line and continuum emission from active galactic nuclei (AGNs) can be used to determine the size and geometry of the broad emission-line regions (BLRs).
S. Kaspi +5 more
semanticscholar +1 more source
Recall of Reverberant Speech in Quiet and Four-Talker Babble Noise
Brain Sciences, 2021 Using behavioral evaluation of free recall performance, we investigated whether reverberation and/or noise affected memory performance in normal-hearing adults. Thirty-four participants performed a free-recall task in which they were instructed to repeat
Miseung Koo +6 more
doaj +1 more source
Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database [PDF]
, 2004 We present improved black hole masses for 35 active galactic nuclei (AGNs) based on a complete and consistent reanalysis of broad emission-line reverberation-mapping data.
B. Peterson +13 more
semanticscholar +1 more source