1,080 research outputs found
A test of a physically-based strong ground motion prediction methodology with the 26 September 1997, Mw = 6.0 Colfiorito (Umbria-Marche sequence), Italy earthquake.
No full textWe test the physically-based ground motion hazard prediction methodology of Hutchings et al. [Hutchings, L., Ioannidou, E., Kalogeras, I., Voulgaris, N., Savy, J., Foxall, W., Scognamiglio, L., and Stavrakakis, G., (2007). A physically-based strong ground motion prediction methodology; Application to PSHA and the 1999 M = 6.0 Athens Earthquake. Geophys. J. Int. 168, 569–680.] through an a posteriori prediction of the 26 September 1997, Mw 6.0 Colfiorito (Umbria–Marche, Italy) earthquake at four stations. By “physically-based” we refer to ground motion synthesized with quasi-dynamic rupture models derived from physics and an understanding of the earthquake process. We test five hypotheses proposed by Hutchings et al. [Hutchings, L., Ioannidou, E., Kalogeras, I., Voulgaris, N., Savy, J., Foxall, W., Scognamiglio, L., and Stavrakakis, G., (2007). A physically-based strong ground motion prediction methodology; Application to PSHA and the 1999 M = 6.0 Athens Earthquake. Geophys. J. Int. 168, 569–680.] that support application of the methodology to physically-based probabilistic seismic hazard or risk analysis.
We use two methods to test the hypotheses. First, we test whether observed records fall within the 68% log-normal confidence interval for the distribution of absolute acceleration response (AAR), pseudo velocity response (PSV), and Fourier amplitude spectra (FFT) created by a suite of source models. We also used the godness of fit between synthesized seismograms to verify whether at least one of the source models in the suite generates seismograms that match the observed waveforms, and if good fits to seismograms are due to source models that are close to what is actually known about the Colfiorito earthquake.
We tested the hypotheses with a range of source parameters proposed by Hutchings et al. [Hutchings, L., Ioannidou, E., Kalogeras, I., Voulgaris, N., Savy, J., Foxall, W., Scognamiglio, L., and Stavrakakis, G., (2007). A physically-based strong ground motion prediction methodology; Application to PSHA and the 1999 M = 6.0 Athens Earthquake. Geophys. J. Int. 168, 569–680.]. We synthesized records from 100 rupture scenarios that were generated by a Monte Carlo selection of parameters within the range. This range was based upon having some prior knowledge of where the earthquake would occur. Observed values of AAR, PSV and FFT fit within the 68% confidence interval for all four stations, and one of the models generated seismograms that had a good fit compared to the observations.
Moreover, a strict test for validating a physically-based ground motion hazard prediction methodology is that as more information is known about the source, the uncertainty of the prediction should narrow, but still include the actual ground motion. Then, we tightened the source parameters to be centered about the known parameters for the Colfiorito earthquake, and allowed for less uncertainty in their values. We found this to be true for this test. While the 68% confidence interval narrowed from a factor of ± about 4 to ± about 2 for the distributions, observed values of AAR, PSV and FFT still fit within the distributions for all four stations. Ultimately, we have calculated peak ground velocity (PGV) and peak ground acceleration (PGA) for all the synthetic seismograms obtained from the computed scenarios, and we have found that they are comparable with the actual and with those from the attenuation relation.
We conclude that the methodology of Hutchings et al. [Hutchings, L., Ioannidou, E., Kalogeras, I., Voulgaris, N., Savy, J., Foxall, W., Scognamiglio, L., and Stavrakakis, G., (2007). A physically-based strong ground motion prediction methodology; Application to PSHA and the 1999 M = 6.0 Athens Earthquake. Geophys. J. Int. 168, 569–680.] is promising in giving ground motion hazard prediction estimates.Published145-1583.1. Fisica dei terremotiJCR Journalreserve
Il danno alla persona
No full textIl saggio analizza il decisivo contributo di Renato Scognamiglio all'evoluzione del danno alla persona nell'ordinamento giuridico italiano. Dopo aver ripercorso gli studi dedicati da Scognamiglio al tema, il saggio verifica l'impatto di tali studi sulla della riflessione scientifica sul danno non patrimoniale e sugli orientamenti della giurisprudenza. L'autore propone una razionalizzazione e l'integrazione delle conclusioni oggi prevalenti al fine di ridurre, per quanto possibile, le oscillazioni interpretative e l'incertezza applicativa.The essay analyzes the decisive contribution of Renato Scognamiglio to the evolution of damage to the person in the Italian legal system. After having retraced the studies dedicated by Scognamiglio to the topic, the essay verifies the impact of these studies on the scientific reflection on non-pecuniary damage and on the orientations of jurisprudence. The author proposes a rationalization and integration of the conclusions prevalent today in order to reduce, as far as possible, the interpretative fluctuations and the applicative uncertainty
Un restatement dialogante con la dottrina, così come con i giudici di merito, della giurisprudenza di legittimità in materia di responsabilità sanitaria
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Il negozio giuridico nel pensiero di Renato Scognamiglio e gli sviluppi verso una concezione normativa del negozio
No full textThe essay analyzes the significant contribution of Renato Scognamiglio to the scientific reflection on the juridical act, starting from the monographic study of 1950 "Contributo alla teoria del negozio giuridico". The topicality of Scognamiglio's thought allows us to return to reflect on private autonomy and on the general instrument of its exercise, the juridical act, understood as an act of self-regulation. Starting from the studies of Scognamiglio, the author proposes a normative conception of the juridical act, which offers the most adequate understanding scheme of the relationships between private autonomy and state orde
ABBANDONO E RIUSO IN ARCHITETTURA. L'USO TRANSITORIO COME PRATICA DI CONSERVAZIONE IN ULSTER
No full textIn Northern Ireland and especially in Belfast recent legislation has not prevented a series of building losses. These were abandoned and demolished in the name of a development idea based on building substitution. Already in the 60s of the twentieth century the prospect of economic development accelerated a series of unscrupulous operations, with unregulated growth in suburban areas, the construction of infrastructures that did not take into due account the urban proportions and a rapid decline of central areas; in addition to this the “Troubles” gave the coup de grace to physiological evolution of the city.
Several associations and trusts were born to raise awareness and promote campaigns to rescue buildings at risk of demolition as a reaction to what was happening in the areas with higher density of historical buildings. Indeed, until not long ago the fine for modifying or even demolishing a listed building without permission were anything but a deterrent for such offence, but the action of these associations in many cases managed to avoid further losses for historical heritage. In addition to listed buildings, since 1993 the Heritage at Risk project has been set up, with the aim of providing support and advice to building owners who
want to undertake appropriate maintenance plan and to support potential buyers interested in restoring a building at risk. A register to this effect (Built Heritage at Risk Northern Ireland or BHARNI) is managed by the Historic Buildings Unit of the Northern Ireland Environment Agency (NIEA) The main objectives of the BHARNI project are to register architecturally and historically significant buildings at risk and act as a
catalyst for conservation and reuse of built heritage. In this perspective, it is also accepted the practice of carrying out a work phase that allows "meanwhile uses" or even "pop-up uses" to ease a process of re-appropriation even of large buildings for communities. at the same time "meanwhile use" guarantee at least maintenance, pending investments that allow a definitive restoration and a sustainable use
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