442 research outputs found
Crisis of Parties and Change of Party System in Italy
No full textLeonardo Morlino. Is there a crisis of democracy in Southern Europe? 30 cm. This paper is based partly on a seminar entitled Is there a crisis of democracy in Southern Europe?" presented at the Center on November 16, 1995" - T.p. Includes bibliographical references (p. 30-32
Premessa
No full textTraduzione del saggio 'Die Liedersammlungen der Troubaours' di G. Grober ad opera di G. Lachin, con revisione e curatela di N. Ballestrin, A. Bampa, G. Borriero, L. Morlino
Cosmic ray electrons released by supernova remnants
No full textThe process that allows cosmic rays (CRs) to escape from their sources and be released into the Galaxy is still largely unknown. The comparison between CR electron and proton spectra measured at Earth suggests that electrons are released with a spectrum steeper than protons by Δsep 0.3 for energies above 10 GeV and by Δsep 1.2 above 1 TeV. Assuming that both species are accelerated at supernova remnant shocks, we here explore two possible scenarios that can in principle justify steeper electron spectra: (i) energy losses due to synchrotron radiation in an amplified magnetic field and (ii) time-dependent acceleration efficiency. We account for magnetic field amplification produced by either CR-induced instabilities or by magnetohydrodynamics instabilities my means of a parametric description. We show that both mechanisms are required to explain the electron spectrum. In particular, synchrotron losses can only produce a significant electron steepening above 1 TeV, while a time-dependent acceleration can explain the spectrum at lower energies if the electron injection into diffusive shock acceleration is inversely proportional to the shock speed. We discuss observational and theoretical evidences supporting such a behaviour. Furtheore, we predict two additional spectral features: a spectral break below few GeV (as required by existing observations) due to the acceleration efficiency drop during the adiabatic phase, and a spectral hardening above 20 TeV (where no data are available yet) resulting from electrons escaping from the shock precursor
Changes for Democracy: Actors, Structures, Processes
No full textIn this major new work, the author presents a broad-ranging and far-reaching analysis of the process of democratization. Having reviewed the main theoretical positions in the literature, he goes on to propose a new definition of democracy and to highlight and discuss the existence of a new type of regime: the hybrid regime. The second and third parts of the book cover three geopolitical areas (Southern Europe, Eastern Europe, and Latin America) and examine the main issues in the process of democratization across each area, including the transition toward democracy, installation, consolidation and crisis. From this analysis a new, more nuanced theoretical position is developed and presented. The analysis provides the richest reflection yet on one of the most important political processes of the modern times. The book will be essential reading for all scholars and students of democratization
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