Nonlinear propagation of whistler wave and turbulent spectrum in reconnection region of magnetopause

2017 ◽  
Vol 24 (9) ◽  
pp. 092902 ◽  
Author(s):  
R. P. Sharma ◽  
Neha Pathak ◽  
Nitin Yadav ◽  
Prachi Sharma
Keyword(s):  
Whistler Wave ◽  
Nonlinear Propagation ◽  
Reconnection Region ◽  
Turbulent Spectrum

Nonlinear propagation of kinetic Alfvén wave and turbulent spectrum in reconnection region of magnetotail

2017 ◽  
Vol 24 (6) ◽  
pp. 062902 ◽  
Author(s):  
Nitin Yadav ◽  
Rajesh Kumar Rai ◽  
Prachi Sharma ◽  
R. Uma ◽  
R. P. Sharma
Keyword(s):  
Alfven Wave ◽  
Nonlinear Propagation ◽  
Kinetic Alfvén Wave ◽  
Reconnection Region ◽  
Turbulent Spectrum ◽  
Kinetic Alfven Wave

The nonlinear interaction of the whistler wave with the inertial alfven wave in the magnetosphere of the Earth

2002 ◽  
Vol 8 (5-6) ◽  
pp. 96-101
Author(s):  
V.N. Fedun ◽  
◽  
A.K. Yukhimuk ◽  
A.D. Voitsekhovska ◽  
О.К. Cheremnykh ◽  
...  
Keyword(s):  
Nonlinear Interaction ◽  
Whistler Wave ◽  
Alfven Wave ◽  
Inertial Alfvén Wave ◽  
The Earth

Trombone Transfer Functions: Comparison Between Frequency-Swept Sine Wave and Human Performer Input

2012 ◽  
Vol 37 (4) ◽  
pp. 447-454
Author(s):  
James W. Beauchamp
Keyword(s):  
Transfer Function ◽  
Transfer Functions ◽  
Cutoff Frequency ◽  
Sine Wave ◽  
Nonlinear Propagation ◽  
Linear Filter ◽  
Wave System ◽  
General Effect ◽  
Filter Characteristic ◽  
High Pass

Abstract Source/filter models have frequently been used to model sound production of the vocal apparatus and musical instruments. Beginning in 1968, in an effort to measure the transfer function (i.e., transmission response or filter characteristic) of a trombone while being played by expert musicians, sound pressure signals from the mouthpiece and the trombone bell output were recorded in an anechoic room and then subjected to harmonic spectrum analysis. Output/input ratios of the signals’ harmonic amplitudes plotted vs. harmonic frequency then became points on the trombone’s transfer function. The first such recordings were made on analog 1/4 inch stereo magnetic tape. In 2000 digital recordings of trombone mouthpiece and anechoic output signals were made that provide a more accurate measurement of the trombone filter characteristic. Results show that the filter is a high-pass type with a cutoff frequency around 1000 Hz. Whereas the characteristic below cutoff is quite stable, above cutoff it is extremely variable, depending on level. In addition, measurements made using a swept-sine-wave system in 1972 verified the high-pass behavior, but they also showed a series of resonances whose minima correspond to the harmonic frequencies which occur under performance conditions. For frequencies below cutoff the two types of measurements corresponded well, but above cutoff there was a considerable difference. The general effect is that output harmonics above cutoff are greater than would be expected from linear filter theory, and this effect becomes stronger as input pressure increases. In the 1990s and early 2000s this nonlinear effect was verified by theory and measurements which showed that nonlinear propagation takes place in the trombone, causing a wave steepening effect at high amplitudes, thus increasing the relative strengths of the upper harmonics.

Anomalous Resistivity Associated with Secondary Islands in the Reconnection Region

2012 ◽  
Vol 29 (8) ◽  
pp. 089401 ◽  
Author(s):  
Meng Zhou ◽  
Wei Su ◽  
Xiao-Hua Deng ◽  
Ming Yao
Keyword(s):  
Anomalous Resistivity ◽  
Reconnection Region

Second‐harmonic diffraction field in nonlinear propagation of transversely limited surface acoustic wave beams

1982 ◽  
Vol 53 (12) ◽  
pp. 8516-8524 ◽  
Author(s):  
A. Alippi ◽  
A. Palma ◽  
A. Palmieri ◽  
G. Socino ◽  
E. Verona
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Second Harmonic ◽  
Nonlinear Propagation ◽  
Diffraction Field ◽  
Limited Surface
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