Search results for: K. Madoyan

Authors: Gohar Madoyan, Kristine Harutyunyan, Gevorg Barseghyan

Abstract:

It is common knowledge that linguistic manipulation is and has always been a powerful instrument of political discourse. Politicians from different countries and through centuries have successfully used linguistic means to persuade the public. Yet, this persuasion should be linguistically unobtrusive. Small changes in wording may result in a huge difference in perception by the audience. Thus, manipulation is a strategy that is mostly used to convey a certain message to the manipulators, who should be aware of the vulnerabilities of their audience and who must use them to achieve control. Political manipulation, though commonly observed in the 21st century, can easily be traced back to ancient rhetoric, which warns us to choose words carefully while addressing the audience. On the other hand, modern manipulative techniques have become more sophisticated, making use of all scientific advances.

Keywords: manipulators, politics, persuasion, political discourse, linguo-stylistic analysis, rhetoric

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Authors: V. Paployan, K. Madoyan, A. Melikyan, H. Minassian

Abstract:

Resonant two-photon ionization (TPI) is a valuable technique for the study of clusters due to its ultrahigh sensitivity. The comparison of the observed TPI spectra with results of calculations allows to deduce important information on the shape, rotational and vibrational temperatures of the clusters with high accuracy. In this communication we calculate the TPI cross-section for pump-probe scheme in Ag neutral cluster. The pump photon energy is chosen to be close to the surface plasmon (SP) energy of cluster in dielectric media. Since the interband transition energy in Ag exceeds the SP resonance energy, the main contribution into the TPI comes from the latter. The calculations are performed by separating the coordinates of electrons corresponding to the collective oscillations and the individual motion that allows to take into account the resonance contribution of excited SP oscillations. It is shown that the ionization cross section increases by two orders of magnitude if the energy of the pump photon matches the surface plasmon energy in the cluster.

Keywords: resonance enhancement, silver clusters, surface plasmon, two-photon ionization

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