Energy content of stormtime ring current from phase space mapping simulations

1993 ◽  
Vol 20 (16) ◽  
pp. 1727-1730 ◽  
Author(s):  
Margaret W. Chen ◽  
Michael Schulz ◽  
Larry R. Lyons
Keyword(s):  
Phase Space ◽  
Ring Current ◽  
Energy Content ◽  
Space Mapping

scholarly journals Tomography as a diagnostic tool for phase space mapping of intense particle beams

2006 ◽  
Vol 9 (11) ◽  
Author(s):  
D. Stratakis ◽  
R. A. Kishek ◽  
H. Li ◽  
S. Bernal ◽  
M. Walter ◽  
...  
Keyword(s):  
Phase Space ◽  
Diagnostic Tool ◽  
Space Mapping ◽  
Particle Beams

First Results from the Phase Space Mapping Experiment

2021 ◽  
Author(s):  
Earl E. Scime ◽  
Cuyler Beatty ◽  
David Caron ◽  
Tyler Gilbert ◽  
Andrew Jemiolo ◽  
...  
Keyword(s):  
Phase Space ◽  
Space Mapping ◽  
Mapping Experiment ◽  
First Results

scholarly journals The ring current: a short biography

2012 ◽  
Vol 3 (2) ◽  
pp. 131-142 ◽  
Author(s):  
A. Egeland ◽  
W. J. Burke
Keyword(s):  
Magnetic Field ◽  
Ring Current ◽  
Energy Content ◽  
Spectral Characteristics ◽  
Direct Access ◽  
Sufficient Evidence ◽  
Mass Spectrometers ◽  
Before And After ◽  
Magnetic Signatures ◽  
Collective Plasma

Abstract. The "ring current'' grows in the inner magnetosphere during magnetic storms and contributes significantly to characteristic perturbations to the Earth's field observed at low-latitudes. This paper outlines how understanding of the ring current evolved during the half-century intervals before and after humans gained direct access to space. Its existence was first postulated in 1910 by Carl Størmer to explain the locations and equatorward migrations of aurorae under stormtime conditions. In 1917 Adolf Schmidt applied Størmer's ring-current hypothesis to explain the observed negative perturbations in the Earth's magnetic field. More than another decade would pass before Sydney Chapman and Vicenzo Ferraro argued for its necessity to explain magnetic signatures observed during the main phases of storms. Both the Størmer and Chapman–Ferraro models had difficulties explaining how solar particles entered and propagated in the magnetosphere to form the ring current. During the early 1950s Hannes Alfvén correctly argued that the ring current was a collective plasma effect, but failed to explain particle entry. The discovery of a weak but persistent interplanetary magnetic field embedded in a continuous solar wind provided James Dungey with sufficient evidence to devise the magnetic merging-reconnection model now regarded as the basis for understanding magnetospheric and auroral activity. In the mid-1960s Louis Frank showed that ions in the newly discovered plasma sheet had the energy spectral characteristics needed to explain the ring current's origin. The introduction of ion mass spectrometers on space missions during the 1970s revealed that O+ ions from the ionosphere contribute large fractions of the ring current's energy content. Precisely how cold O+ ions in the ionosphere are accelerated to ring-current energies still challenges scientific understanding.

scholarly journals Illumination design for extended sources based on phase space mapping

2017 ◽  
Vol 56 (6) ◽  
pp. 065103 ◽  
Author(s):  
Denise Rausch ◽  
Michael Rommel ◽  
Alois M. Herkommer ◽  
Taimoor Talpur
Keyword(s):  
Phase Space ◽  
Space Mapping ◽  
Illumination Design ◽  
Extended Sources

scholarly journals A Simple Emotion Discrimination Technique Based on Triangle Phase Space Mapping of HRV Signals

2017 ◽  
Vol 7 (3) ◽  
pp. 41-48 ◽  
Author(s):  
Ateke Goshvarpour ◽  
◽  
Ataollah Abbasi ◽  
Atefeh Goshvarpour
Keyword(s):  
Phase Space ◽  
Space Mapping

scholarly journals Energy Content in the Stormtime Ring Current

2001 ◽  
Author(s):  
N. E. Turner ◽  
D. N. Baker ◽  
T. L. Pulkkimen ◽  
J. L. Roeder ◽  
J. F. Funnell ◽  
...  
Keyword(s):  
Ring Current ◽  
Energy Content

scholarly journals Recognition of lung volume condition based on phase space mapping using electrical impedance tomography

2019 ◽  
Vol 10 (1) ◽  
pp. 34-39
Author(s):  
Mohammad Karimi Moridani ◽  
Fatemeh Choopani ◽  
Mandana Kia
Keyword(s):  
Phase Space ◽  
Lung Volume ◽  
Space Mapping ◽  
Normal Lung ◽  
Mapping Technique ◽  
Impedance Tomography ◽  
Lung Volumes ◽  
Respiratory Illnesses ◽  
Non Invasive ◽  
Significant Difference

Abstract The purpose of this paper is to identify differences between abnormal and normal lung signals gathered by an EIT device, which is a new, non-invasive system that seeks the electrical conductivity and permittivity inside a body. Lung performances in patients are investigated using Phase Space Mapping technique on Electrical EIT signals. The database used in this paper contains 82 registered records of 52 individuals with proper lung volume. The results of this paper show that as the delay parameter (τ) increases, the SD1 parameter of phase space mapping indicates a significant difference between normal and abnormal lung volumes. The value of the SD1 parameter with τ = 6 in the case that the lung volume is in a normal condition is 342.57 ± 32.75 while it is 156.71 ± 26.01 in non-optimal mode. This method can be used to identify the patients’ lung volumes with chronic respiratory illnesses and is an accurate assessment of the diverse methods to treat respiratory system illnesses in addition to saving various therapeutic costs and dangerous consequences that are likely to occur by using improper treatment methods. It can also reduce the required treatment durations.

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