World Library  


 
  • Cover Image

Asymmetric Multifractal Model for Solar Wind Intermittent Turbulen...

By: W. M. MacEk; A. Szczepaniak

Description: Space Research Centre, Polish Academy of Science, Bartycka 18A, 00-716 Warsaw, Poland. We consider nonuniform energy transfer rate for solar wind turbulence depending on the solar cycle activity. To achieve this purpose we determine the generalized dimensions and singularity spectra for the experimental data of the solar wind measured in situ by Advanced Composition Explorer spacecraft during solar maximum (2001) and minimum (2006) at 1 AU. By determin...

Marsch, E. and Tu, C.-Y.: Intermittency, non-Gaussian statistics and fractal scaling of MHD fluctuations in the solar wind, Nonlin. Processes Geophys., 4, 101–124, 1997.; Marsch, E., Tu, C.-Y., and Rosenbauer, H.: Multifractal scaling of the kinetic energy flux in solar wind turbulence, Ann. Geophys., 14, 259–269, 1996.; Meneveau, C. and Sreenivasan, K. R.: Simple multifractal cascade model for fully developed turbulence, Phys. Rev. Lett., 59, 1424–1427, 1987.; Meneveau,...

Read More
  • Cover Image

On the Problem of Optimal Approximation of the Four-wave Kinetic I...

By: V. G. Polnikov; L. Farina

Description: Centro de Previsão de Tempo e Estudos Climáticos (CPTEC), Instituto Nacional de Pesquisas Espaciais (INPE), CPTEC/INPE, Cachoeira Paulista, SP, 12630-000, Brazil. The problem of optimization of analytical and numerical approximations of Hasselmann's nonlinear kinetic integral is discussed in general form. Considering the general expression for the kinetic integral, a principle to obtain the optimal approximation is formulated. From this consi...

Read More
  • Cover Image

Quantitative Analysis of Randomness Exhibited by River Channels Us...

By: T. Verbovšek; G. Žibret

Description: Geological Survey of Slovenia, Ljubljana, Slovenia. This paper presents a numerical evaluation of the randomness which can be observed in the geometry of major river channels. The method used is based upon that of generating a Sierpinski triangle via the chaos game technique, played with the sequence representing the river topography. The property of the Sierpinski triangle is that it can be constructed only by playing a chaos game with random values. P...

Jeffrey, H. J.: Chaos game visualization of sequences, Comput. Graph., 16 (1), 25–33, 1992.; Angeles, G. R, Perillo, M. E., Piccolo, M. C., and Pierini, J. O.: Fractal analysis of tidal channels in the Bahía Blanca Estuary (Argentina), Geomorphology, 57, 263–274, 2004.; Beauvais, A. A. and Montgomery, D. R.: Are channel networks statistically self-similar?, Geology, 25 (12), 1063–1066, 1997.; Barnsley M.: Fractals Everywhere, Academic Press, New York, 1988.; Horton, R. E...

Read More
  • Cover Image

Data Assimilation for Plume Models : Volume 12, Issue 2 (09/02/2005)

By: E. Bélanger; S. Derosier; D. A. Yuen; C. A. Hier Majumder; A. P. Vincent

Description: Computational Physics Group, Earth Science Division, Lawrence Livermore National Laboratory, Livermore, CA, USA. We use a four-dimensional variational data assimilation (4D-VAR) algorithm to observe the growth of 2-D plumes from a point heat source. In order to test the predictability of the 4D-VAR technique for 2-D plumes, we perturb the initial conditions and compare the resulting predictions to the predictions given by a direct numerical simulation (...

Read More
  • Cover Image

Probing the Linearity and Nonlinearity in the Transitions of the A...

By: A. A. Tsonis

Description: Dept. of Mathematical Sciences, Atmospheric Sciences Group, University of Wisconsin-Milwaukee, Milwaukee, WI, USA. In this paper, we apply the principles of information theory that relate to the definition of nonlinear predictability, which is a measure that describes both the linear and nonlinear components of a system. By comparing this measure to a measure of linear predictability, one can assess whether a given system has a strong non...

Read More
 
1
|
2
|
3
Records: 41 - 45 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.