scholarly journals NONLINEAR BEHAVIOR OF THE ONE-DIMENSIONAL BEAM PLASMA SYSTEM.

1970 ◽  
Author(s):  
G. Joyce ◽  
G. Knorr ◽  
T. Burns
Keyword(s):  
Nonlinear Behavior ◽  
Plasma System ◽  
One Dimensional ◽  
Beam Plasma ◽  
The One

Probability-maximization theory for a highly turbulent beam-plasma system

1987 ◽  
Vol 38 (3) ◽  
pp. 483-493 ◽  
Author(s):  
Tadas Nakamura ◽  
Takashi Yamamoto
Keyword(s):  
Theoretical Study ◽  
Collisionless Plasma ◽  
System Boundary ◽  
Plasma System ◽  
Mean Velocity ◽  
New Approach ◽  
One Dimensional ◽  
Beam Plasma ◽  
Probable Distribution ◽  
The Mean

A new approach to the theoretical study of turbulent behaviour of a collisionless plasma is developed. This approach is based upon the concept or probability maximization originally applied to collisional gases by Boltzmann. The probability-maximization theory deals with stochastic processes in a steady turbulent plasma by solving for the most-probable distribution. Our theory as applied to counter-streaming electron beams can quantitatively predict beam retardation, i.e. a decrease in the mean velocity of electrons injected from the system boundary. This is also in agreement with the results of a one-dimensional numerical experiment performed for such a beam-plasma system.

scholarly journals Nonlinear physics and energetic particle transport features of the beam–plasma instability

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
Nakia Carlevaro ◽  
Matteo V. Falessi ◽  
Giovanni Montani ◽  
Fulvio Zonca
Keyword(s):  
Energetic Particle ◽  
Particle Beam ◽  
Transport Processes ◽  
Model Description ◽  
Plasma System ◽  
One Dimensional ◽  
Beam Plasma ◽  
Local Transport ◽  
Energetic Particle Transport ◽  
Beam Plasma Instability

In this paper we study transport features of a one-dimensional beam–plasma system in the presence of multiple resonances. As a model description of the general problem of a warm energetic particle beam, we assume $n$ cold supra-thermal beams and investigate the self-consistent evolution in the presence of the complete spectrum of nearly degenerate Langmuir modes. A qualitative transport estimation is obtained by computing the Lagrangian Coherent Structures of the system on given temporal scales. This leads to the splitting of the phase space into regions where the local transport processes are relatively faster. The general theoretical framework is applied to the case of the nonlinear dynamics of two cold beams, for which numerical simulation results are illustrated and analysed.

Extended Tomlinson Model for Rheological Response

1998 ◽  
Vol 543 ◽  
Author(s):  
V. Zaloj ◽  
M. Urbakh ◽  
J. Klafter
Keyword(s):  
Nonlinear Behavior ◽  
Normal Direction ◽  
Surface Forces Apparatus ◽  
One Dimensional ◽  
Additional Information ◽  
Frictional Properties ◽  
Tomlinson Model ◽  
Harmonic Chain ◽  
The One ◽  
Normal Coupling

AbstractWe investigate the response of a confined harmonic chain to an external harmonic driving force. A model is introduced which extends the one-dimensional Tomlinson model to include motion in the normal direction. This model with lateral-normal coupling mimics recent measurements on friction, using surface forces apparatus (SFA). The model predicts a critical driving amplitude below which the response is linear. For higher amplitudes the system exhibits a nonlinear behavior and an apparent shear thinning. We discuss the effects of shear induced dilatancy, which results from the lateral-normal coupling, on the energy dissipation, and therefore on the frictional properties. It is demonstrated that measurements of response in the normal direction provide additional information on the mechanisms of friction.

Exploring the Multidimensional Facets of Authoritarianism: Authoritarian Aggression and Social Dominance Orientation

2008 ◽  
Vol 67 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Stefano Passini
Keyword(s):  
Social Dominance ◽  
Factor Model ◽  
Three Dimensional ◽  
Social Dominance Orientation ◽  
Model Fit ◽  
Regression Analyses ◽  
One Dimensional ◽  
Confirmatory Factor ◽  
The One ◽  
Better Than

The relation between authoritarianism and social dominance orientation was analyzed, with authoritarianism measured using a three-dimensional scale. The implicit multidimensional structure (authoritarian submission, conventionalism, authoritarian aggression) of Altemeyer’s (1981, 1988) conceptualization of authoritarianism is inconsistent with its one-dimensional methodological operationalization. The dimensionality of authoritarianism was investigated using confirmatory factor analysis in a sample of 713 university students. As hypothesized, the three-factor model fit the data significantly better than the one-factor model. Regression analyses revealed that only authoritarian aggression was related to social dominance orientation. That is, only intolerance of deviance was related to high social dominance, whereas submissiveness was not.

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

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