627 research outputs found
Il Neolitico di Su Coloru (Laerru,Sassari):nuovi dati
No full textSi presentano i risultati delle ricerche a grotta Su Goloru, Laerru dove è stata messa in luce una sequanza stratigrafica neolitca con orizzonti del Cardiale, e di Bonu Ighinu. Attenzione particolare alle industrie litiche con osservazioni tipologiche, tecnologiche e struttural
Cuore. De Amicis tra critica e utopia: alcune considerazioni generali
No full textFor many years De Amicis’ bibliography was looked at with a prejudicial eye because of the negative opinions about Hearth. But De Amicis’ work is worth much attention, because the author was able to represent the social changes in the newborn Italian State: the role of the army, the importance of travelling, school’s functions, socialism. Hearth too deserves a reappraisal and Pino Boero, founding his analysis on a literary critic perspective, underlines the narrative abilities of the author’s and his skill in getting in touch with a wider public
Elaborazione e analisi distributiva del sito di Neto – Via Verga: problemi e prospettive di ricerca di un contesto insediativo complesso
No full textAmbient magnetic field amplification in shock fronts of relativistic jets : an application to GRB afterglows
No full textGRS thanks CNPQ for financial support. DFG thanks the European Research Council (ADG-2011 ECOGAL) and the Brazilian agencies CNPq (No. 300382/2008-1), CAPES (3400-13-1) and FAPESP (No. 2011/12909-8) for financial support. GK thanks FAPESP (No. 2009/50053-8, 2011/51275-4, 2013/04073-2, 2013/18815-0) for financial support. EMGDP thanks FAPESP (No. 2006/50654-3) and CNPq (306598/2009-4) for financial support. Date of Acceptance: 06/10/2014Strong downstream magnetic fields of the order of ∼1 G, with large correlation lengths, are believed to cause the large synchrotron emission at the afterglow phase of gamma-ray bursts (GRBs). Despite the recent theoretical efforts, models have failed to fully explain the amplification of the magnetic field, particularly in a matter-dominated scenario. We revisit the problem by considering the synchrotron emission to occur at the expanding shock front of a weakly magnetized relativistic jet over a magnetized surrounding medium. Analytical estimates and a number of high-resolution 2D relativistic magnetohydrodynamical (RMHD) simulations are provided. Jet opening angles of θ = 0°–20°, and ambient to jet density ratios of 10−4–102 were considered. We found that most of the amplification is due to compression of the ambient magnetic field at the contact discontinuity between the reverse and forward shocks at the jet head, with substantial pile-up of the magnetic field lines as the jet propagates sweeping the ambient field lines. The pile-up is maximum for θ → 0, decreasing with θ, but larger than in the spherical blast problem. Values obtained for certain models are able to explain the observed intensities. The maximum correlation lengths found for such strong fields is of lcorr ≤ 1014 cm, 2–6 orders of magnitude larger than the found in previous works.Peer reviewe
The Bell Beaker Tumulus on Via Bruschi in Sesto Fiorentino: new researches
No full textThe archaeological area of Via Bruschi, already noted for some twenty years as a centre of ritual (Sarti et al. 1987-1988), is among the settlement evidence for Developed Bell Beaker Step 3 (Leonini, Sarti 2008). The study of Bell Beaker settlements in the Florentine area has been carried out through analysis of their relationship to the landscape of the past, by attempting to reconstruct its settings and its sequence of changes identified at a local level. The analysis of the spatial, chronological and functional relationships of the settlement and ritual findings (rendered interactive and dynamic by use of GIS) must, in fact, include the evaluation of the presumed relationships and contacts between the excavated structures. These relationships are not identifiable, at the present time, in a direct way because of the limitations of field research. For this reason, a hypothesis already proposed earlier (Sarti, Martini 2001) has been confirmed for two Bell Beaker areas. Furthermore, it is valid in general on a territorial scale (Pizziolo, Sarti 2006) or where it is possible to apply the concept of “Settlement Unit” (Pizziolo, Sarti 2008). This concept refers to a large context, within which different structural finds can be recognized, belonging to different phases during which the same space was in use. It includes large settlement nuclei (Settlement Units), with functional structures and substructures, all of long duration with the re-use of areas in the close vicinity; Via Bruschi is related to a group of two large settlement areas, Sassaiola and Frilli, referred to as Developed Bell Beaker
Interpretazione cognitiva, interpretazione decisoria, interpretazione creativa
No full textThe article critically reviews Riccardo Guastini’s theory of legal interpretation, as it is now exposed in the recent book Interpretare e argomentare. While broadly sympathetic with Guastini’s jurisprudential project, the author tries to highlight some weaknesses in his conceptual framework – namely, regarding the distinction between “scientific” and “decisional” interpretation, the distinction between interpretation properly understood and creation of new law, and the concept of interpretive creativit
Crisi dell'età dei diritti?
No full textThe paper discusses various criticisms that are frequently leveled against the so-called “age of rights” – i.e., the contemporary legal and political doctrine that places funda-mental rights at the center of legal and political discourse, and that shapes legal institu-tions accordingly (written, rigid constitution, judicial review of legislation, etc.). After providing a definition of the main features of the age of rights, the author discusses and tries to rebut the principal critical stances on this topic, mainly by making use of the theoretical tools deployed by contemporary analytical jurisprudence on legal rights and legal reasoning
Diritti sociali Per una critica di alcuni luoghi comuni
No full textThe article reconstructs and critically assesses some of the most recurring arguments in legal and political philosophy to the effect that social rights are different in structure from, and necessarily incompatible with, the more familiar civil and political liberties. The author shows that social rights and civil and political liberties have in common more than meets the eye, and so they are different in degree rather than in kind. Moreover, while these rights can certainly happen to conflict one against the other in particular instances, they prove not only to be compatible but even mutually reinforcing as far as their respective axiological foundations are concerned
Di diritti e altre cose strane. Una replica
No full textThe author replies to four commentaries to his book Il costituzionalismo dei diritti (il Mulino, 2017) taking the chance to further clarify his own stance on some topics discussed thereby
The Bell Beaker Tumulus of Via Bruschi in Sesto Fiorentino (Florence, Italy): New Research
No full textThe archaeological area of Via Bruschi, already noted for some twenty years as a centre of ritual (Sarti et al. 1987-1988), is among the settlement evidence for Developed Bell Beaker Step 3 (Leonini, Sarti 2008). The study of Bell Beaker settlements in the Florentine area has been carried out through analysis of their relationship to the landscape of the past, by attempting to reconstruct its settings and its sequence of changes identified at a local level. The analysis of the spatial, chronological and functional relationships of the settlement and ritual findings (rendered interactive and dynamic by use of GIS) must, in fact, include the evaluation of the presumed relationships and contacts between the excavated structures. These relationships are not identifiable, at the present time, in a direct way because of the limitations of field research. For this reason, a hypothesis already proposed earlier (Sarti, Martini 2001) has been confirmed for two Bell Beaker areas. Furthermore, it is valid in general on a territorial scale (Pizziolo, Sarti 2006) or where it is possible to apply the concept of “Settlement Unit” (Pizziolo, Sarti 2008). This concept refers to a large context, within which different structural finds can be recognized, belonging to different phases during which the same space was in use. It includes large settlement nuclei (Settlement Units), with functional structures and substructures, all of long duration with the re-use of areas in the close vicinity; Via Bruschi is related to a group of two large settlement areas, Sassaiola and Frilli, referred to as Developed Bell Beaker.Sarti Lucia, Fenu Pino, Leonini Valentina, Martini Fabio, Perusin Sara. The Bell Beaker Tumulus of Via Bruschi in Sesto Fiorentino (Florence, Italy): New Research. In: Ancestral Landscape. Burial mounds in the Copper and Bronze Ages (Central and Eastern Europe – Balkans – Adriatic – Aegean, 4th-2nd millennium B.C.) Proceedings of the International Conference held in Udine, May 15th-18th 2008. Lyon : Maison de l'Orient et de la Méditerranée Jean Pouilloux, 2012. pp. 231-238. (Travaux de la Maison de l'Orient et de la Méditerranée. Série recherches archéologiques, 58
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