Source characteristics of main and post-burst-increase phases of solar bursts at 17 GHz

Solar Physics ◽  
1983 ◽  
Vol 87 (2) ◽  
Author(s):  
Takeo Kosugi ◽  
Keizo Kai ◽  
Takashi Suzuki
Keyword(s):  
Source Characteristics ◽  
Solar Bursts

scholarly journals Acoustic Source Data for Medium Speed IC-Engines

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
Antti Hynninen ◽  
Raimo Turunen ◽  
Mats Åbom ◽  
Hans Bodén
Keyword(s):  
High Frequency ◽  
Internal Combustion Engines ◽  
Low Frequency ◽  
Acoustic Source ◽  
Ic Engine ◽  
Source Characteristics ◽  
Medium Speed ◽  
Source Data ◽  
Exhaust Noise ◽  
Ic Engines

Knowledge of the acoustic source characteristics of internal combustion engines (IC-engines) is of great importance when designing the exhaust duct system and its components to withstand the resulting dynamic loads and to reduce the exhaust noise emission. The goal of the present study is to numerically and experimentally investigate the medium speed IC-engine acoustic source characteristics, not only in the plane wave range but also in the high frequency range. The low frequency acoustic source characteristics were predicted by simulating the acoustic multiload measurements by using a one-dimensional process simulation code. The low frequency in-duct exhaust noise of a medium speed IC-engine can be quite accurately predicted. The high frequency source data is estimated by averaging the measured acoustic pressures with different methods; using the simple cross-spectra averaging method seems promising in this instance.

scholarly journals Nonlinear analysis of decimetric solar bursts

2009 ◽  
Vol 5 (S264) ◽  
pp. 279-281
Author(s):  
Reinaldo R. Rosa ◽  
Mauricio J. A. Bolzan ◽  
Francisco C. R. Fernandes ◽  
H. S. Sawant ◽  
Marian Karlický
Keyword(s):  
Solar Radio ◽  
Inhomogeneous Plasma ◽  
Active Regions ◽  
Singularity Spectrum ◽  
Frequency Range ◽  
Radio Emissions ◽  
Magnetic Structures ◽  
Fine Structures ◽  
Solar Bursts ◽  
Solar Radio Emissions

AbstractThe solar radio emissions in the decimetric frequency range (above 1 GHz) are very rich in temporal and spectral fine structures due to nonlinear processes occurring in the magnetic structures on the corresponding active regions. In this paper we characterize the singularity spectrum, f(α), for solar bursts observed at 1.6, 2.0 and 3 GHz. We interpret our findings as evidence of inhomogeneous plasma turbulence driving the underlying plasma emission process and discuss the nonlinear multifractal approach into the context of geoeffective solar active regions.

Interplanetary-particle associations with type III solar bursts

1971 ◽  
Vol 76 (28) ◽  
pp. 6932-6938 ◽  
Author(s):  
T. E. Graedel ◽  
L. J. Lanzerotti
Keyword(s):  
Type Iii ◽  
Solar Bursts

The Oroville Earthquakes: A study of source characteristics and site effects

1982 ◽  
Vol 87 (B6) ◽  
pp. 4585-4594 ◽  
Author(s):  
Stephen N. Cohn ◽  
Tai-Lin Hong ◽  
Donald V. Helmberger
Keyword(s):  
Site Effects ◽  
Source Characteristics

X-pinch source characteristics for x-rays above 10 keV

2004 ◽  
Author(s):  
Tatyana A. Shelkovenko ◽  
Sergei A. Pikuz ◽  
Vera M. Romanova ◽  
Georgii V. Ivanenkov ◽  
ByungMoo Song ◽  
...  
Keyword(s):  
X Rays ◽  
Source Characteristics
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