5,345 research outputs found
Contro la funzionalizzazione della contrattazione collettiva. Riflessioni sul pensiero di Mario Rusciano
No full textL'autore riflette sul pensiero di Mario Rusciano in punto di funzionalizzazione della contrattazione collettiva.The author reflects on the thought of Mario Rusciano in relation to the subject of the functionalisation of collective bargaining
Protocol of integrated sustainable interventions for historic small smart cities: the mitigation of disaster risk
No full textThe paper focuses on strategies for the mitigation of disaster risk in the “internal” (or peripheral) areas of the Italian peninsula and in other countries of the Euro-Mediterranean zone, through the protocol “Historical Small Smart Cities”. Aiming to raising their attractive-ness and according to the recent upgrades in the field of Heritage Protection in terms of inte-grated interventions and risk management, the protocol "Historical Small Smart Cities" is a smart governance tool for the sustainable recovery of historic cities, that includes social partici-pation and the “modulation of the protection” of urban built heritage. In particular, this protocol can provide to promoters and cultural heritage institutions a direct listening to the real needs of the citizens, without wasting money on less effective works. This factor could be of great im-pact on the economic aspect of the Risk Management and Reduction financing policies, by en-hancing the involvement of private investors on the special plans (such as recovery plans) at national, regional and local level. At the same time, the institutions must also assume the re-sponsibility and the merit of creating a conscious, informed community, more prepared for un-certainty and awareness of the criticalities of their territory
Protocol of integrated sustainable interventions for historic small smart cities: the mitigation of disaster risk
No full textThe paper focuses on strategies for the mitigation of disaster risk in the “internal” (or peripheral) areas of the Italian peninsula and in other countries of the Euro-Mediterranean zone, through the protocol “Historical Small Smart Cities”. Aiming to raising their attractive-ness and according to the recent upgrades in the field of Heritage Protection in terms of inte-grated interventions and risk management, the protocol "Historical Small Smart Cities" is a smart governance tool for the sustainable recovery of historic cities, that includes social partici-pation and the “modulation of the protection” of urban built heritage. In particular, this protocol can provide to promoters and cultural heritage institutions a direct listening to the real needs of the citizens, without wasting money on less effective works. This factor could be of great im-pact on the economic aspect of the Risk Management and Reduction financing policies, by en-hancing the involvement of private investors on the special plans (such as recovery plans) at national, regional and local level. At the same time, the institutions must also assume the re-sponsibility and the merit of creating a conscious, informed community, more prepared for un-certainty and awareness of the criticalities of their territory
DO TRANSFER TAXES REDUCE INTERGENERATIONAL TRANSFERS?
No full textWe estimate the effect of taxes on intergenerational transfers exploiting a sequence of Italian reforms culminating with the abolishment of transfer taxes. We use the 1993-2006 Survey of Household Income and Wealth, which has data on real estate transfers received and information on potential donors as well as recipients. Differences-in-differences estimates indicate that the abolition of transfer taxes increased the probability that high-wealth donors make a transfer by 2 percentage points and square meters transferred by 9.3 meters relative to poorer donors
Granular packs under vertical tapping: structure evolution, grain motion, and dynamical heterogeneities
No full textThe compaction dynamics of a granular media subject to a sequence of vertical taps made of fluid pulses is investigated via molecular dynamics simulations. Our study focuses on three different levels: macroscopic (volume fraction), mesoscopic (Voronoi volumes, force distributions), and microscopic (grain displacements). We show that the compaction process has many characteristics which are reminiscent of the slow dynamics of glass forming systems, as previously suggested. For instance, the mean volume fraction slowly increases in time and approaches a stationary value following a stretched exponential law, and the associated compaction time diverges as the tapping intensity decreases. The study of microscopic quantities also put in evidence the existence of analogies with the dynamics of glass formers, as the existence of dynamical heterogeneities and spatially correlated motion of grains; however, it also shows that there are important qualitative differences, as, for instance, in the role of the cage effect. Correlations between geometry and dynamics of the system at the grain level are put in evidence by comparing a particle Voronoi volume and its displacement in a single tap
The age-productivity gradient: evidence from a sample of F1 driver
No full textEstimating the effect of aging on productivity requires clean measures of productivity. Additionally, one needs to control for unobserved heterogeneity at the worker, firm and worker/firm level, to account for the role of experience and to correct for selection bias. We tackle these issues exploiting a panel of Gran Prix Formula One drivers, which provides a unique setting to single out the data requirements needed to credibly estimate the effect of age on productivity. Results robust to the inclusion of worker, firm and match effects show that the age-productivity link has an inverted U-shape profile with a peak at the age of 30-32. The use of repeated cross-sections of individuals also produces consistent results provided that cohort effects are properly accounted for. Relying on team-average measures of productivity makes instead inference harder
Recent results on the jamming phase diagram
No full textSystems of particles interacting via short-ranged repulsive forces are characterized by a jamming transition from a flowing to a disordered solid state, whose understanding is of great theoretical and practical relevance. The jamming phase diagram introduced by Liu and Nagel in 1998 provided a conceptual picture from which to investigate this transition, suggesting that the shear stress might play a role analogous to that of temperature in the jamming phenomenology. Here we highlight recent works which suggest qualitative changes in the shape of the diagram
Starch/zirconium phosphate composite films: Hydration, thermal stability, and mechanical properties
No full textComposite films of plasticized potato starch filled with 1, 4, and 6 wt% zirconium phosphate (ZrP) particles have been prepared by casting mixtures of gelatinized starch, a gel of partially exfoliated ZrP in water, and glycerol. The XRD patterns of the composite films reveal the formation of glycerol intercalated ZrP for the highest filler loadings (4 and 6 wt%) while suggest partial filler exfoliation for the composite with 1 wt% ZrP, in agreement with TEM analysis. The presence of the filler improves the thermal resistance of the starch, both at low and, particularly, at high temperature. The composites also exhibit a significant enhancement in the Young's modulus (from ∼700 MPa for neat starch up to ∼1600 MPa for 6 wt% filler loading) and in the yield stress (from ∼17 to ∼38 MPa). The increase in stiffness is concomitant with a water uptake reduction, which is maximum at 100% relative humidity
- …
