Approaching the Low-Frequency Spectrum of Rotating Stars

2009 ◽  
pp. 101-121 ◽  
Author(s):  
M. Rieutord
Keyword(s):  
Frequency Spectrum ◽  
Low Frequency ◽  
Rotating Stars

Preferential acceleration of heavy ions from thermal velocities

1968 ◽  
Vol 46 (10) ◽  
pp. S638-S641 ◽  
Author(s):  
D. B. Melrose
Keyword(s):  
Frequency Spectrum ◽  
High Frequency ◽  
Heavy Ions ◽  
Crab Nebula ◽  
Low Frequency ◽  
High Frequency Waves ◽  
Hydromagnetic Waves ◽  
The Crab Nebula ◽  
Low Frequency Waves

The acceleration of ions from thermal velocities is analyzed to determine conditions under which heavy ions can be preferentially accelerated. Two accelerating mechanisms involving high-and low-frequency hydromagnetic waves respectively are considered. Preferential acceleration of heavy ions occurs for high-frequency waves if the frequency spectrum falls off faster than (frequency)−1. For the low-frequency waves heavy ions are less effectively accelerated than lighter ions. However, very heavy ions can be preferentially accelerated, the abundances of the very heavy ions being enhanced by a factor Ai over the thermal abundances. Acceleration of ions in the envelope of the Crab nebula is considered as an example.

LXXV. The low frequency spectrum of the cygnus (19N4A) and cassiopeia (23N5A) radio sources

1956 ◽  
Vol 1 (8) ◽  
pp. 725-737 ◽  
Author(s):  
R. J. Lamden ◽  
A. C. B. Lovell
Keyword(s):  
Frequency Spectrum ◽  
Low Frequency ◽  
Radio Sources

scholarly journals Strength in numbers in the low-frequency spectrum

2015 ◽  
Vol 16 (11) ◽  
pp. 623-623
Author(s):  
Magdalena Skipper
Keyword(s):  
Frequency Spectrum ◽  
Low Frequency

scholarly journals Frontispiz: Observation of the Low‐Frequency Spectrum of the Water Trimer as a Sensitive Test of the Water‐Trimer Potential and the Dipole‐Moment Surface

2020 ◽  
Vol 132 (28) ◽  
Author(s):  
Raffael Schwan ◽  
Chen Qu ◽  
Devendra Mani ◽  
Nitish Pal ◽  
Gerhard Schwaab ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Frequency Spectrum ◽  
Low Frequency ◽  
Sensitive Test ◽  
Water Trimer

Origin of low-frequency spectrum structure of four-photon scattering in liquid water

1998 ◽  
Vol 66 (1) ◽  
pp. 91-94 ◽  
Author(s):  
A.F. Bunkin ◽  
G.A. Lyakhov ◽  
A.A. Nurmatov ◽  
N.V. Suyazov
Keyword(s):  
Frequency Spectrum ◽  
Liquid Water ◽  
Low Frequency ◽  
Photon Scattering ◽  
Spectrum Structure

A New Advanced Topology of Stacked Multicell Inverter

2014 ◽  
Vol 15 (4) ◽  
pp. 327-333 ◽  
Author(s):  
Mohamad R. Banaei ◽  
M. R. Jannati Oskuee ◽  
F. Mohajel Kazemi
Keyword(s):  
Frequency Spectrum ◽  
Output Voltage ◽  
Low Frequency ◽  
Experimental Results ◽  
The Novel ◽  
Stored Energy ◽  
Well Performance ◽  
Flying Capacitors ◽  
Voltage Frequency ◽  
Simulation Results

Abstract In this paper, a new advanced topology of stacked multicell inverter is proposed which is generally suitable for high number of steps associated with a low number of switches. Compared with traditional flying capacitor multicell and stacked multicell (SM) inverters, doubling the number of output voltage levels and the RMS value, ameliorating the output voltage frequency spectrum, decreasing the number and rating of components, stored energy and rating of flying capacitors are available with the proposed inverter. These improvements are achieved by adding only four low-frequency switches to the traditional SM inverter’s structure. The suggested topology is simulated using MATLAB/SIMULINK software, and simulation results are presented to indicate well-performance of the novel converter. In addition, the experimental results of proposed topology prototype have been presented to validate its practicability.

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