Stability Dust-Ion-Acoustic Wave in Dusty Plasmas With Stream -Influence of Charge Fluctuation of Dust Grains

There is a quickly increasing wealth of experimental data on so-called dusty plasmas i. e. ionized gases or usual plasmas that contain micron sized charged particles. Interest in these structures is driven both by their importance in many astrophysical as well as commercial situations. Among them are linear and nonlinear wave phenomena. We consider the influence of dust charge fluctuations on stability of the ion-acoustic waves when the stream of particles is present. It is assumed that all grains of dust have equal masses but charges are not constant in time-they may fluctuate in time. The dust charges are not really independent of the variations of the plasma potentials. All modes will influence the charging mechanism, and feedback will lead to several new interesting and unexpected phenomena. The charging of the grains depends on local plasma characteristics. If the waves disturb these characteristic, then charging of the grains is affected and the grain charge is modified, with a resulting feedback on the wave mode. In case considering here, when temperature of electrons is much greater then the temperature of the ions and temperature of electrons is not great enough for further ionization of the ions, we show that stability of the acoustic wave depends only one phenomenological coefficient.Comment: 4 pages,Plasma 2005,Opole-Turawa, Poland, 6-9 september 200

Charge Fluctuation of Dust Grain and Its Impact on Dusty-Acoustic Wave Damping

We consider the influence of dust charge fluctuations on damping of the dust-ion-acoustic waves. It is assumed that all grains have equal masses but charges are not constant in time - they may fluctuate in time. The dust charges are not really independent of the variations in the plasma potentials. All modes will influence the charging mechanism, and feedback will lead to several new interesting and unexpected phenomena. The charging of the grains depends on local plasma characteristics. If the waves disturb these characteristic, then charging of the grains is affected and the grain charge is modified, with a resulting feedback on the wave mode. In the case considered here, when the temperature of electrons is much greater than the temperature of the ions and the temperature of electrons is not great enough for further ionization of the ions, we show that attenuation of the acoustic wave depends only on one phenomenological coefficientComment: 4 pages, 4th International Conference on the Physics of Dusty Plasmas, Orleans-Franc

The relationship of managers with subordinates as a development enabler of enterprise in the SME sector

The theoretical part discusses the factors determining and limiting the development of enterprises in the SME sector. The significance of the relationship between the supervisor and the subordinates and their influence on selected aspects of the company's functioning was also presented. The aim of the research was to get acquainted with the opinion of managers and employees of SME enterprises on the importance of the relationship between their supervisor and subordinates and the influence of the level of relations on various aspects of the company's development. The research results indicate that high quality of relations between superiors and subordinates has a positive impact on the development of the surveyed enterprises.peer-reviewe

Examination of Weekly Step Count Patterns During a 12 Week Pedometer Program

Please refer to the pdf version of the abstract located adjacent to the title