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EDUCATIONAL VALUE: DO UNIVERSITY CHOICES AFFECT COMPANY PERFORMANCE?
Alberto Pezzi,Luca Petruzzellis,Ottorino Morresi 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
This research analyzes the effect of the education choices on the career of CEOs and the performance of their companies. A sample of companies with a market capitalization greater than EUR 1 billion has been considered.
PLASMA EMISSION BY COUNTER-STREAMING ELECTRON BEAMS
Ziebell, L. F.,Petruzzellis, L. T.,Yoon, P. H.,Gaelzer, R.,Pavan, J. American Astronomical Society 2016 The Astrophysical Journal Vol.818 No.1
<P>The radiation emission mechanism responsible for both type-II and type-III solar radio bursts is commonly accepted as plasma emission. Recently Ganse et al. suggested that type-II radio bursts may be enhanced when the electron foreshock geometry of a coronal mass ejection contains a double hump structure. They reasoned that the counter-streaming electron beams that exist between the double shocks may enhance the nonlinear coalescence interaction, thereby giving rise to more efficient generation of radiation. Ganse et al. employed a particle-in-cell simulation to study such a scenario. The present paper revisits the same problem with EM weak turbulence theory, and show that the fundamental (F) emission is not greatly affected by the presence of counter-streaming beams, but the harmonic (H) emission becomes somewhat more effective when the two beams are present. The present finding is thus complementary to the work by Ganse et al.</P>
PLASMA EMISSION BY NONLINEAR ELECTROMAGNETIC PROCESSES
Ziebell, L. F.,Yoon, P. H.,Petruzzellis, L. T.,Gaelzer, R.,Pavan, J. IOP Publishing 2015 The Astrophysical journal Vol.806 No.2
<P>The plasma emission, or electromagnetic (EM) radiation at the plasma frequency and/or its harmonic(s), is generally accepted as the radiation mechanism responsible for solar type II and III radio bursts. Identification and characterization of these solar radio burst phenomena were done in the 1950s. Despite many decades of theoretical research since then, a rigorous demonstration of the plasma emission process based upon first principles was not available until recently, when, in a recent Letter, Ziebell et al. reported the first complete numerical solution of EM weak turbulence equations; thus, quantitatively analyzing the plasma emission process starting from the initial electron beam and the associated beam-plasma (or Langmuir wave) instability, as well as the subsequent nonlinear conversion of electrostatic Langmuir turbulence into EM radiation. In the present paper, the same problem is revisited in order to elucidate the detailed physical mechanisms that could not be reported in the brief Letter format. Findings from the present paper may be useful for interpreting observations and full-particle numerical simulations.</P>