Search

L���emergenza sanitaria dovuta al COVID-19 ha proiettato il personale della pubblica amministrazione italiana in uno smart working mirato e, sostanzialmente, forzato per tutti i dipendenti. Questo, accanto al beneficio immediato di mitigazione degli effetti della pandemia, ha fatto emergere i vantaggi e gli svantaggi della sua applicazione al mondo della Ricerca. Mediante un���analisi delle differenze tra servizi tecnico-amministrativi e attivit�� di ricerca, e tenendo come riferimento il Contratto Collettivo Nazionale del Lavoro, si vogliono evidenziare, in questo articolo, i nodi irrisolti della applicazione piena dello smart working anche in vista dell'applicazione di un Piano Organizzativo Lavoro Agile che le amministrazioni degli Enti Pubblici di Ricerca devono redigere annualmente. Le finalit�� di questo articolo sono quelle di sottolineare le specificit�� della Ricerca rispetto alla gestione amministrativa in un���ottica di collaborazione costruttiva e di miglioramento del funzionamento dell���Ente. Da una indagine rivolta a 585 Ricercatori e Tecnologi di un grande istituto di ricerca italiano, l���Istituto Nazionale di Geofisica e Vulcanologia, sono emerse, in maniera chiara e netta, le posizioni del personale sui punti nodali della questione di un'applicazione del Lavoro Agile che rispetti i dettami del Contratto collettivo nazionale dei Ricercatori e Tecnologi per quanto riguarda l���autonomia e la libert�� della ricerca sancite nel nostro ordinamento a partire dalla Carta costituzionale. L���analisi dei risultati potr�� favorire l���individuazione delle possibili armonizzazioni tra il lavoro agile e l���attivit�� di ricerca per trovare ��� il modello rispondente alle proprie esigenze e caratteristiche��� possa essere condiviso da tutta la comunit�� scientifica degli EPR italiani e sia a vantaggio del benessere lavorativo anche in emergenza sanitaria., {"references":["Webinar \"Il lavoro Smart nella Ricerca\" https://www.youtube.com/watch?v=PLy8x98kbXE"]}

Following a recent paper we use weak-motion waveforms to calibrate a model for the prediction of earthquake-induced ground-motion in Taiwan, in the 0.25-5.0 Hz frequency range, valid up to M w 7.6. The excitation/attenuation model is given in terms of frequency-dependent seismic wave attenuation, Q s(f), geometrical spreading, g(r), a magnitude-dependent stress parameters Δσ for the excitation terms, and a site term for each seismic station used in the study. A set of weak-motion data was gathered from about 170 aftershocks of the Chi-Chi earthquake, M w 7.6, of 1999 September 20, (17:47 UTC), recorded by 10 broad-band seismic stations. The moment magnitudes of the registered aftershocks ranged from M w 3.0 to 6.5, and the hypocentral distances from a few kilometres to about 250 km. A frequency-dependent crustal quality factor, Q(f) = 350f 0.32, was obtained, to be coupled with the geometrical spreading function Earthquake-related excitation spectra were calibrated over our empirical results by using a magnitude-dependent Brune model with a stress drop value of Δσ= 8.0 ± 1.0 MPa for the largest event of M w 6.5 in our data set and with a near surface attenuation parameter of κ= 0.05 s. Results on region-specific crustal attenuation and source scaling were used to generate stochastic simulations both for point-source and extended-fault ruptures through the computer codes: Stochastic Model SIMulation, SMSIM and Extended-Fault Model Simulation, EXSIM. The absolute peak ground accelerations (PGA), peak ground velocities (PGV) and 5 per cent-damped Spectral Accelerations (SA) at three different frequencies, 0.33 Hz, 1.0 Hz and 3.0 Hz for several magnitudes and distance ranges were predicted at large magnitudes, well beyond magnitude M w 6.5, the upper limit for the events of our weak-motion data set. The performance of the stochastic model was then tested against the strong-motion data recorded during the M w 7.6 Chi-Chi earthquake, and against several other empirical ground-motion models., peer-reviewed

In this study, we characterize the scaling of the ground motions for frequencies ranging between 0.25 and 5 Hz, obtaining results for seismic attenuation, geometrical spreading, and source parameters in Taiwan. We regressed this large number of weak-motion data in order to characterize the regional propagation and the absolute source scaling. Stochastic simulations are generated for finite-fault ruptures using the obtained parameters to predict the absolute peaks of the ground acceleration and velocity for several magnitude and distance range, as well as beyond the magnitude range of the weak-motion data set on which they are calculated. The predictions are then compared with recorded strong motion data and empirical ground motion prediction equation obtained for the study region. We showed that our regional parameters, obtained from independent weak-motion database, may be applied for evaluation of ground motion parameters for earthquakes of magnitude up to 7.6., peer-reviewed

We present rupture details of the Mw6.3 April 6, 2009 L’Aquila earthquake derived by back-projecting teleseismic P waves from a virtual seismic array. The technique that we use has previously been applied to large magnitude earthquakes, but here we report the first application to a moderate size earthquake, showing that it is possible to image teleseismically the finiteness of the source. We used waveforms from about 60 broadband seismic stations from the Incorporated Research Institutions for Seismology (IRIS) data center. The traces were aligned and normalized by using a multi-channel cross-correlation algorithm. We evaluated the array response function and used the 4th root staking in our analysis. We found that the L’Aquila earthquake ruptured toward the east and that it had two different pulses about 4 s and 18 s after the origin time. The rupture moved with a velocity of about 2 km/s. These results are in good agreement with the results obtained using satellite data and with the ones obtained by INGV geodesists. They are also consistent with the INGV earthquake survey. The major damage was also a located east of the epicenter and the specific distribution of damage is in agreement with the energy bursts detected in this paper. The back-projection technique is potentially very fast and it is possible to obtain an image of the rupture process within 20-30 minutes of the origin time. This information can be important to governmental agencies in order to guide emergency response and rescue together with other traditional methods such us ShakeMap., peer-reviewed