scholarly journals Correlation based passive imaging with a white noise source

2018 ◽  
Vol 116 ◽  
pp. 132-160 ◽  
Author(s):  
T. Helin ◽  
M. Lassas ◽  
L. Oksanen ◽  
T. Saksala
Keyword(s):  
White Noise ◽  
Noise Source ◽  
Passive Imaging

scholarly journals Inverse Problem for the Wave Equation with a White Noise Source

2014 ◽  
Vol 332 (3) ◽  
pp. 933-953 ◽  
Author(s):  
Tapio Helin ◽  
Matti Lassas ◽  
Lauri Oksanen
Keyword(s):  
Inverse Problem ◽  
Wave Equation ◽  
White Noise ◽  
Noise Source

scholarly journals Yield displacements in multistory aseismic design

1960 ◽  
Vol 50 (3) ◽  
pp. 441-453
Author(s):  
G. N. Bycroft
Keyword(s):  
White Noise ◽  
Noise Source ◽  
Analog Computer ◽  
Aseismic Design ◽  
Shear Structures ◽  
Large Earthquakes

ABSTRACT This paper investigates the plastic displacements occurring when certain types of elastoplastic multistory shear structures are subjected to large earthquakes. It is directed toward finding a variation of the horizontal stiffness and strength up the structure in order to minimize yield displacements and distribute them over the structure. The analysis has been made on an analog computer using a white noise source to simulate the earthquake disturbance.

Changes in masked thresholds of a harbour seal (Phoca vitulina) associated with angular separation of signal and noise sources

1994 ◽  
Vol 72 (11) ◽  
pp. 1863-1866 ◽  
Author(s):  
S. D. Turnbull
Keyword(s):  
White Noise ◽  
Pure Tone ◽  
Noise Source ◽  
Angular Separation ◽  
Phoca Vitulina ◽  
Harbour Seal ◽  
Noise Sources ◽  
Detection Thresholds ◽  
Noise Masker ◽  
Significant Difference

The masked pure tone thresholds of a harbour seal (Phoca vitulina) were measured at various angles using a white noise masker. The white noise source was placed at 0°, 30°, 60°, and 90° relative to the midline of the seal's head (0°). The masked pure tone thresholds for each angle were determined at 2, 4, 8, and 16 kHz. As the angle separating the signal and noise sources increased from 0° to 90°, the critical ratios of the harbour seal decreased by 1–4 dB. This shift in masked thresholds from a reference point of 0° azimuth was significant (H = 10.374, df = 3,16, p < 0.05). No significant difference was found in masked thresholds between 0° and 30° or between 60° and 90°. This indicates that if a noise source is separated by more than 30° relative to the location of a vocalizing seal, signal detection thresholds will be enhanced and communication distances increased.

scholarly journals Fast physical random bit generation using a novel millimeter-wave white noise source

2022 ◽  
Author(s):  
Ya Guo ◽  
Wen-Jie Liu ◽  
Yimin Huang ◽  
YueHui sun ◽  
Romain Zinsou ◽  
...  
Keyword(s):  
White Noise ◽  
Millimeter Wave ◽  
Noise Source

3.5 kW bidirectionally pumped narrow-linewidth fiber amplifier seeded by white-noise-source phase-modulated laser

Laser Physics ◽  
2018 ◽  
Vol 28 (10) ◽  
pp. 105101 ◽  
Author(s):  
Tenglong Li ◽  
Congwen Zha ◽  
Yinhong Sun ◽  
Yi Ma ◽  
Weiwei Ke ◽  
...  
Keyword(s):  
White Noise ◽  
Noise Source ◽  
Fiber Amplifier ◽  
Narrow Linewidth ◽  
Source Phase

scholarly journals A digital white-noise source

1981 ◽  
Vol 13 (3) ◽  
pp. 384-384
Author(s):  
William M. Jenkins
Keyword(s):  
White Noise ◽  
Noise Source

scholarly journals INFLUENCE OF LENGTH ON THE NOISE DELAYED SWITCHING OF LONG JOSEPHSON JUNCTIONS

2008 ◽  
Vol 18 (09) ◽  
pp. 2857-2862 ◽  
Author(s):  
K. G. FEDOROV ◽  
A. L. PANKRATOV ◽  
B. SPAGNOLO
Keyword(s):  
White Noise ◽  
Josephson Junctions ◽  
Gordon Equation ◽  
Noise Source ◽  
Transient Dynamics ◽  
Sine Gordon Equation ◽  
Small Noise ◽  
Sine Gordon Model

The transient dynamics of long overlap Josephson junctions in the frame of the sine-Gordon model with a white noise source is investigated. The effect of noise delayed decay is observed for the case of overdamped sine-Gordon equation. It is shown that this noise induced effect, in the range of small noise intensities, vanishes for junction lengths greater than several Josephson penetration lengths.

Integrated Fractional white Noise as an Alternative to Multifractional Brownian Motion

2007 ◽  
Vol 44 (02) ◽  
pp. 393-408 ◽  
Author(s):  
Allan Sly
Keyword(s):  
Stochastic Process ◽  
Brownian Motion ◽  
White Noise ◽  
Gaussian Process ◽  
Discrete Data ◽  
Hölder Exponent ◽  
Scaling Properties ◽  
Multifractional Brownian Motion ◽  
Local Properties

Multifractional Brownian motion is a Gaussian process which has changing scaling properties generated by varying the local Hölder exponent. We show that multifractional Brownian motion is very sensitive to changes in the selected Hölder exponent and has extreme changes in magnitude. We suggest an alternative stochastic process, called integrated fractional white noise, which retains the important local properties but avoids the undesirable oscillations in magnitude. We also show how the Hölder exponent can be estimated locally from discrete data in this model.

Auditory Selective Attention in Cerebral-Palsied Individuals

1985 ◽  
Vol 16 (4) ◽  
pp. 260-266 ◽  
Author(s):  
Lee Ann Laraway
Keyword(s):  
Selective Attention ◽  
White Noise ◽  
Normal Subjects ◽  
Auditory Selective Attention ◽  
Normal Individuals ◽  
Significant Difference

The purpose of this study was to determine whether there is a statistically significant difference between the auditory selective attention abilities of normal and cerebral-palsied individuals. Twenty-three cerebral-palsied and 23 normal subjects between the ages of 5 and 21 were asked to repeat a series of 30 items consisting of from 2 to 4 digits in the presence of intermittent white noise. Results of the study indicate that cerebral-palsied individuals perform significantly poorer than normal individuals when the stimulus is accompanied by noise. Noise was not a significant factor in the performance of the normal subjects regardless of age.

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