World Library  


 
  • Cover Image

Discrete Simulations of Spatio-temporal Dynamics of Small Water Bo...

By: B. S. Daya Sagar

Description: Faculty of Engineering and Technology, Melaka Campus, Multimedia University, Jalan Ayer Keroh Lama, 75450, Melaka, Malaysia. Spatio-temporal patterns of small water bodies (SWBs) under the influence of temporally varied stream flow discharge are simulated in discrete space by employing geomorphologically realistic expansion and contraction transformations. Cascades of expansion-contraction are systematically performed by synchronizing them with stream fl...

Read More
  • Cover Image

Spatial Structures and Directionalities in Monsoonal Precipitation...

By: N. Malik; J. Kurths; N. Marwan

Description: Potsdam Institute for Climate Impact Research, P.O. Box 601203, 14412, Potsdam, Germany. Precipitation during the monsoon season over the Indian subcontinent occurs in form of enormously complex spatiotemporal patterns due to the underlying dynamics of atmospheric circulation and varying topography. Employing methods from nonlinear time series analysis, we study spatial structures of the rainfall field during the summer monsoon and identify principle reg...

Bookhagen, B. and Burbank, D. W.: Topography, relief, and TRMM-derived rainfall variations along the Himalaya, Geophys. Res. Lett., 33, L08405, doi:10.1029/2006GL026037, 2006.; Ding, Y. and Sikka, D. R.: Synoptic Systems and Weather, in: The Asian Monsoon, edited by: Wang, B., Springer, 2006.; Gadgil, S.: The Indian Monsoon and its variability, Annu. Rev. Earth Pl. Sc., 31, 429–67, 2003.; Gadgil, S., Yadumani, and Joshi, N.: Coherent rainfall zones of the Indian region, ...

Read More
  • Cover Image

Geometric Aspects of Hf Driven Langmuir Turbulence in the Ionosphe...

By: E. Helmersen; D. F. Dubois; E. Mjølhus

Description: University of Tromsø, Faculty of Science, Department of Mathematics and Statistics, N-9037 Tromsø, Norway. The geometric aspects of HF-generated Langmuir turbulence in the ionosphere and its detection by radars are theoretically discussed in a broad approach, including local modelling (damped and driven Zakharov system), basic parametric instabilities, polarization and strength of the driving electric field, and radar configurations. Sele...

Read More
  • Cover Image

A Study of Magnetic Fluctuations and Their Anomalous Scaling in th...

By: A. Balogh; C. Pagel

Description: The Blackett Laboratory, Imperial College, London, UK. The solar wind is a highly turbulent and intermittent medium at frequencies between 10-4 and 10-1 Hz. Power spectra are used to look at fluctuations in the components of the magnetic field at high frequencies over a wide range of latitudes. Results show steady turbulence in the polar regions of the Sun and a more varied environment in the equatorial region. The m...

Read More
  • Cover Image

Achieving Fast Reconnection in Resistive Mhd Models Via Turbulent ...

By: A. Lazarian; G. Lapenta

Description: Centrum voor Plasma-Astrofysica, Departement Wiskunde, Katholieke Universiteit Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium. Astrophysical fluids are generally turbulent and this preexisting turbulence must be taken into account for models of magnetic reconnection in astrophysical, solar or heliospheric environments. In addition, reconnection itself induces turbulence which provides an important feedback on the reconnection process. In this paper w...

Alfv{én}, H.: Existence of Electromagnetic-Hydrodynamic Waves, Nature, 150, 405–406, 1942.; Armstrong, J. W., Rickett, B. J. and Spangler, S. R.: Electron density power spectrum in the local interstellar medium, Astrophys. J., 443, 209–221, 1995.; Beck, R., Brandenburg, A., Moss, D., Shukurov, A., and Sokoloff, D.: Galactic Magnetism: Recent Developments and Perspectives, Annu. Rev. Astronomy and Astrophysics, 34, 155–206, 1996.; Beresnyak, A. and Lazarian, A.: Structure...

Read More
  • Cover Image

Long Range Predictability of Atmospheric Flows : Volume 8, Issue 1...

By: C. Rosier; R. Robert

Description: CNRS UMR 5582, Institut Fourier, 100 Rue des mathématiques, BP 74, 38402 Saint Martin d’Hères Cedex, France. In the light of recent advances in 2D turbulence, we investigate the long range predictability problem of atmospheric flows. Using 2D Euler equations, we show that the full nonlinearity acting on a large number of degrees of freedom can, paradoxically, improve the predictability of the large scale motion, giving a picture opposite ...

Read More
  • Cover Image

Relativistic Whistler Oscillitons - Do They Exist? : Volume 12, Is...

By: K. Sauer; E. M. Dubinin; J. F. McKenzie

Description: Max-Planck-Institute für Sonnensystemforschung, Lindau, Germany. We examine the effects of relaxing the assumption of quasi-charge neutrality on the propagation of stationary whistler waves. This necessitates that in the wave frame the equations of motion must be made fully relativistic and when this is done, the correct form of the relativistic dispersive effects is recovered. Our numerical solutions indicate that fully relativistic effects can prevent...

Read More
  • Cover Image

Review Article: the Lagrangian Description of Aperiodic Flows: a C...

By: C. Mendoza; A. M. Mancho

Description: Instituto de Ciencias Matemáticas, CSIC-UAM-UC3M-UCM, C/ Nicolás Cabrera 15, Campus Cantoblanco UAM, 28049, Madrid, Spain. This article reviews several recently developed Lagrangian tools and shows how their combined use succeeds in obtaining a detailed description of purely advective transport events in general aperiodic flows. In particular, because of the climate impact of ocean transport processes, we illustrate a 2-D application on altimeter data set...

Hernández-Carrasco, I., Hernández-Garc\'ia, E., López, C., and Turiel., A.: How reliable are finite-size Lyapunov exponents for the assessment of ocean dynamics?, Ocean Model., 36, 208–218, 2011.; Ide, K., Small, D., and Wiggins, S.: Distinguished hyperbolic trajectories in time-dependent fluid flows: analytical and computational approach for velocity fields defined as data sets, Nonlin. Processes Geophys., 9, 237–263, doi...

Read More
  • Cover Image

Evaluation on the Analogy Between the Dynamic Magnetosphere and a ...

By: A. T. Y. Lui

Description: The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA. The dissipation power and size of auroral blobs are investigated in detail to examine the possible analogy between the dynamic magnetosphere and a forced and/or self-organized critical system. The distributions of these auroral parameters are sorted in terms of different levels of activity, namely substorms, pseudo-breakups, and quiet conditions. A power...

Read More
  • Cover Image

Analysis of Stochastic Model for Nonlinear Volcanic Dynamics : Vol...

By: D. V. Alexandrov; L. B. Ryashko; I. A. Bashkirtseva

Description: Department of Mathematical Physics, Ural Federal University, Lenin ave. 51, 620000 Ekaterinburg, Russia. Motivated by important geophysical applications we consider a dynamic model of the magma-plug system previously derived by Iverson et al.~(2006) under the influence of stochastic forcing. Due to strong nonlinearity of the friction force for a solid plug along its margins, the initial deterministic system exhibits impulsive oscillations. Two types of d...

Alexandrov, D. V., Bashkirtseva, I. A., Malygin, A. P., and Ryashko, L. B.: Sea ice dynamics induced by external stochastic fluctuations, Pure Appl. Geophys., 170, 2273–2282, 2013.; Alexandrov, D. V., Bashkirtseva, I. A., and Ryashko, L. B.: Stochastically driven transitions between climate attractors, Tellus A, 66, 23454, doi:10.3402/tellusa.v66.23454, 2014.; Arathi, S., Rajasekar, S., and Kurths, J.: Stochastic an...

Read More
  • Cover Image

Evolution of Magnetic Helicity in the Course of Kinetic Magnetic R...

By: J. Büchner; T. Wiegelmann

Description: Max-Planck-Institut für Aeronomie, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany. We investigate the evolution of magnetic helicity density in the course of 2D and 3D kinetic magnetic reconnection through thin current sheets. In 2D, the helicity density near a reconnection X-line becomes purely quadrupolar structured, while in 3D, an additional dipolar structure occurs. This dipolar structure is related to kinetic current instabilit...

Read More
  • Cover Image

Rényi Dimensions and Pedodiversity Indices of the Earth Pedotaxa D...

By: F. San José Martínez; J. J. Ibáñez; F. J. Caniego

Description: Dept. Applied Mathematics to Agriculture Engineering, E.T.S.I Agrónomos, Technical University of Madrid, 28040 Madrid, Spain. Pedodiversity, the study and measurement of soil diversity, may be considered as a framework to analyze spatial patterns. Recently, selfsimilar multifractal patterns have been recently reported in the pedotaxa-abundance distributions at the planetary scale. This is the result to be expected from the complexity of earth soil system...

Beck, C. and Schlögl, F.: Thermodynamics of chaotic systems. An Introduction, Cambridge University Press, New York, 1995.; Caniego, F. J., Martín, M. A., and San Jose, F.: Rényi dimensions of soil pore size distribution, Geoderma, 112, 205–216, 2003.; Caniego, F. J., Espejo, R., Martín, M. A., and San José, F.: Multifractal scaling of soil spatial variability, Ecol. Mod., 182, 291–303, 2005.; Borda-de-Agua, L., Hubbell, S. P., and McAllister, M.: Species-Area Curves, Div...

Read More
  • Cover Image

Efficient Selective Filtering of Seismic Data Using Multiscale Dec...

By: V. C. Gurgel; J. M. S. Filho; M. V. C. Henriques; F. E. A. Leite

Description: Departamento de Ciências Exatas, Tecnológicas e Humanas, Universidade Federal Rural do Semi-Árido, Campus Angicos, 59515–000, Angicos, RN, Brazil. Seismic signal processing is an important task in geophysics sounding and represents a permanent challenge in petroleum exploration. Although seismograms could in principle give us a picture of a geological structure, they are very contaminated by spurious signals and the ground roll noise is a strongly undesir...

Mallat, S.: Multifrequency channel decomposition of images and wavelet models, IEEE T. Speech and Signal Process., 37, 2091–2110, 1989.; Corso, G., Kuhn, P., Lucena, L. S., and Thom{é}, Z.: Seismic ground roll time–frequency filtering using the gaussian wavelet transform, Physica A, 318, 551–561, 2003.; Daubechies, I.: Orthonormal bases of compactly supported wavelets, Commun. Pur Appl. Math., 41, 909–996, 1988.; Daubechies, I.: The wavelet transform, time-frequency loca...

Read More
  • Cover Image

An Experimental Study of Regime Transitions in a Differentially He...

By: Th. Von Larcher; M. Vincze; C. Egbers; U. Harlander

Description: Department of Aerodynamics and Fluid Mechanics, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany. A series of laboratory experiments has been carried out in a thermally driven rotating annulus to study the onset of baroclinic instability, using horizontal and uniformly sloping bottom topographies. Different wave flow regimes have been identified and their phase boundaries – expressed in terms of appropriate non-dimensional param...

Bastin, M. E. and Read, P. L.: A laboratory study of baroclinic waves and turbulence in an internally heated rotating fluid annulus with sloping endwalls, J. Fluid Mech., 339, 173–198, 1997.; Bastin, M. E. and Read, P. L.: Experiments on the structure of baroclinic waves and zonal jets in an internally heated, rotating, cylinder of fluid, Phys. Fluids., 10, 374–389, 1998.; Blumsack, S. L. and Gierasch, P. J.: Mars: The effects of topography on baroclinic instability, J. ...

Read More
  • Cover Image

Phase Space Vortices in Collisionless Plasmas : Volume 10, Issue 1...

By: S. Børve; P. Michelsen; H. L. Pécseli; J. Juul Rasmussen; L. K. S. Daldorff; J. Trulsen; J. P. Lynov; P. Guio; K. Saeki

Description: University of Oslo, Institute for Theoretical Astrophysics, Box 1029 Blindern, N-0315 Oslo, Norway. Results on the formation and propagation of electron phase space vortices from laboratory experiments are summarized. The electron phase space vortices were excited in a strongly magnetized Q-machine plasma by applying a pulse to a segment of a waveguide surrounding the plasma. Depending on the temporal variation of the applied pulse, one o...

Read More
  • Cover Image

Earthquake Sequencing: Chimera States with Kuramoto Model Dynamics...

By: M. Cavers; K. Vasudevan; A. Ware

Description: Department of Mathematics and Statistics, University of Calgary, Calgary, Alberta, T2N 1N4, Canada. Earthquake sequencing studies allow us to investigate empirical relationships among spatio-temporal parameters describing the complexity of earthquake properties. We have recently studied the relevance of Markov chain models to draw information from global earthquake catalogues. In these studies, we considered directed graphs as graph theoretic representa...

Abrams, D. M. and Strogatz, S. H.: Chimera states for coupled oscillators, Phys. Rev. Lett., 93, 174102, doi:10.1103/PhysRevLett.93.174102, 2004.; Abrams, D. M., Mirollo, R., Strogatz, S. H., and Wiley, D. A.: Solvable model for chimera states of coupled oscillators, Phys. Rev. Lett., 101, 084103, doi:10.1103/PhysRevLett.101.084103, 2008.; Arenas, A., ...

Read More
  • Cover Image

Organisation of Joints and Faults from 1-cm to 100-km Scales Revea...

By: C. Castaing; D. Sornette; G. Ouillon

Description: Institut de Géodynamique, CNRS URA 1279, Rue A. Einstein, Sophia Antipolis, 06560 Vabonne, France. The classical method of statistical physics deduces the macroscopic behaviour of a system from the organization and interactions of its microscopical constituents. This kind of problem can often be solved using procedures deduced from the Renormalization Group Theory, but in some cases, the basic microscopic rail are unknown and one has to deal only with th...

Read More
  • Cover Image

Conditioning Model Output Statistics of Regional Climate Model Pre...

By: Y. He; J. Freer; F. Pappenberger; F. Wetterhall; H. L. Cloke

Description: European Centre for Medium Range Weather Forecasts, Reading, UK. Dynamical downscaling of Global Climate Models (GCMs) through regional climate models (RCMs) potentially improves the usability of the output for hydrological impact studies. However, a further downscaling or interpolation of precipitation from RCMs is often needed to match the precipitation characteristics at the local scale. This study analysed three Model Output Statistics (MOS) techniq...

Bardossy, A. and Pegram, G.: Downscaling precipitation using regional climate models and circulation patterns toward hydrology, Water Resour. Res., 47, doi:10.1029/2010WR009689, 2011.; Bardossy, A. and Plate, E.: Space-time model for daily rainfall using atmospheric circulation patterns, Water Resour. Res., 28, 1247–1259, 1992.; Baur, F., Hess, P., and Nagel, H.: Kalender der Grosswetterlagen Europas 1881–1939, Bad Hombu...

Read More
  • Cover Image

Thin Layer Shearing of a Highly Plastic Clay : Volume 13, Issue 6 ...

By: G. Gudehus; M. Külzer; A. B. Libreros Bertini; K. Balthasar

Description: Institut für Bodenmechanik und Felsmechanik, Universität Karlsruhe, Germany. Shearing tests with a thin layer of clay between filter slabs render possible large and cyclic deformations with drainage. In the pressure range of 100 kPa they serve to validated visco-hypoplastic constitutive relations. This theory is also confirmed by tests with up to 14 MPa and super-imposed anti-plane cycles. After this kind of seismic disturbance the clay stabilizes if the...

Bauer, E.: Calibration of a comprehensive hypoplastic model for granular materials, Soils and Foundations (Jap. Soc. of Soil Mech. and Foundation Eng.), 36(1), 13–26, 1996.; Bernaix, J.: New laboratory methods of studying the mechanical properties of Rocks, Int. J. Rock Mechanics and Mining Science, 6, 43–90, 1969.; Bertini, A. B L.: Hypo- und viskohypoplastische Modellierung von Kriech- und Rutschbewegungen, besonders infolge Starkbeben, Veröffentlichungen des Institute...

Read More
  • Cover Image

Numerical Modelling of Disintegration of Basin-scale Internal Wave...

By: K. Hutter; V. Vlasenko; N. Stashchuk

Description: School of Earth, Ocean and Environmental Sciences, Plymouth University, Drake Circus,Plymouth PL4 8AA, UK. We present the results of numerical experiments performed with the use of a fully non-linear non-hydrostatic numerical model to study the baroclinic response of a long narrow tank filled with stratified water to an initially tilted interface. Upon release, the system starts to oscillate with an eigen frequency corresponding to basin-scale baroclinic...

Read More
 
1
|
2
|
3
Records: 1 - 20 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.