scholarly journals Core electron temperature and density in the innermost Saturn's magnetosphere from HF power spectra analysis on Cassini

2013 ◽  
Vol 118 (11) ◽  
pp. 7170-7180 ◽  
Author(s):  
P. Schippers ◽  
M. Moncuquet ◽  
N. Meyer-Vernet ◽  
A. Lecacheux
Keyword(s):  
Electron Temperature ◽  
Power Spectra ◽  
Core Electron ◽  
Spectra Analysis

Chaotic vibrations of carbon nanotubes subjected to a traversing force considering nonlocal elasticity theory

2021 ◽  
pp. 239779142110633
Author(s):  
Reza Ebrahimi
Keyword(s):  
Nonlocal Parameter ◽  
Power Spectra ◽  
Beam Theory ◽  
Nonlocal Elasticity Theory ◽  
Effective Control ◽  
Maximum Lyapunov Exponent ◽  
Harmonic Force ◽  
Spectra Analysis ◽  
Chaotic Vibrations ◽  
Euler Bernoulli Beam

The existence of chaos in the lateral vibration of the carbon nanotube (CNT) can contribute to source of instability and inaccuracy within the nano mechanical systems. So, chaotic vibrations of a simply supported CNT which is subjected to a traversing harmonic force are studied in this paper. The model of the system is formulated by using nonlocal Euler–Bernoulli beam theory. The equation of motion is solved using the Rung–Kutta method. The effects of the nonlocal parameter, velocity and amplitude of the traversing harmonic force on the nonlinear dynamic response of the system are analyzed by the bifurcation diagrams, phase plane portrait, power spectra analysis, Poincaré map and the maximum Lyapunov exponent. The results indicate that the nonlocal parameter, velocity and amplitude of the traversing harmonic force have considerable effects on the bifurcation behavior and can be used as effective control parameters for avoiding chaos.

scholarly journals Tests for coronal electron temperature signatures in suprathermal electron populations at 1 AU

2017 ◽  
Vol 35 (6) ◽  
pp. 1275-1291 ◽  
Author(s):  
Allan R. Macneil ◽  
Christopher J. Owen ◽  
Robert T. Wicks
Keyword(s):  
Solar Wind ◽  
Electron Temperature ◽  
Energy Content ◽  
The Sun ◽  
Particle Interactions ◽  
Core Electron ◽  
Suprathermal Electron ◽  
Electron Distributions ◽  
The Relationship ◽  
Coronal Electron

Abstract. The development of knowledge of how the coronal origin of the solar wind affects its in situ properties is one of the keys to understanding the relationship between the Sun and the heliosphere. In this paper, we analyse ACE/SWICS and WIND/3DP data spanning  > 12 years, and test properties of solar wind suprathermal electron distributions for the presence of signatures of the coronal temperature at their origin which may remain at 1 AU. In particular we re-examine a previous suggestion that these properties correlate with the oxygen charge state ratio O7+ ∕ O6+, an established proxy for coronal electron temperature. We find only a very weak but variable correlation between measures of suprathermal electron energy content and O7+ ∕ O6+. The weak nature of the correlation leads us to conclude, in contrast to earlier results, that an initial relationship with core electron temperature has the possibility to exist in the corona, but that in most cases no strong signatures remain in the suprathermal electron distributions at 1 AU. It cannot yet be confirmed whether this is due to the effects of coronal conditions on the establishment of this relationship or due to the altering of the electron distributions by processing during transport in the solar wind en route to 1 AU. Contrasting results for the halo and strahl population favours the latter interpretation. Confirmation of this will be possible using Solar Orbiter data (cruise and nominal mission phase) to test whether the weakness of the relationship persists over a range of heliocentric distances. If the correlation is found to strengthen when closer to the Sun, then this would indicate an initial relationship which is being degraded, perhaps by wave–particle interactions, en route to the observer.

scholarly journals Observation of core electron temperature rise in response to an edge cooling in toroidal helical plasmas

2005 ◽  
Vol 12 (11) ◽  
pp. 110705 ◽  
Author(s):  
N. Tamura ◽  
S. Inagaki ◽  
K. Ida ◽  
T. Shimozuma ◽  
S. Kubo ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Temperature Rise ◽  
Core Electron

Autofocusing based on power-spectra analysis

1994 ◽  
Vol 33 (26) ◽  
pp. 6210 ◽  
Author(s):  
Suganda Jutamulia ◽  
Toshimitsu Asakura ◽  
R. D. Bahuguna ◽  
Panfilo C. De Guzman
Keyword(s):  
Power Spectra ◽  
Spectra Analysis

Imaging of core electron temperature fluctuations of tokamak plasmas

2002 ◽  
Vol 30 (1) ◽  
pp. 72-73 ◽  
Author(s):  
B.H. Deng ◽  
D.L. Brower ◽  
G. Cima ◽  
C.W. Domier ◽  
A.J.H. Donne ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Temperature Fluctuations ◽  
Tokamak Plasmas ◽  
Core Electron

scholarly journals The diagnostic value of power spectra analysis of the sleep electroencephalography in narcoleptic patients

2015 ◽  
Vol 16 (12) ◽  
pp. 1516-1527 ◽  
Author(s):  
Julie Anja Engelhard Christensen ◽  
Emil Gammelmark Schreiner Munk ◽  
Paul E. Peppard ◽  
Terry Young ◽  
Emmanuel Mignot ◽  
...  
Keyword(s):  
Power Spectra ◽  
Diagnostic Value ◽  
Spectra Analysis

Power Spectra Analysis of Levator Veli Palatini Muscle Electromyogram During Velopharyngeal Closure for Swallowing, Speech, and Blowing

Dysphagia ◽  
2007 ◽  
Vol 22 (2) ◽  
pp. 135-139 ◽  
Author(s):  
Kanji Nohara ◽  
Yasuko Kotani ◽  
Maki Ojima ◽  
Yasuhiro Sasao ◽  
Takashi Tachimura ◽  
...  
Keyword(s):  
Power Spectra ◽  
Spectra Analysis ◽  
Levator Veli Palatini ◽  
Velopharyngeal Closure
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