Search results for "technical"
showing 10 items of 955 documents
La decisione politica nel tempo dell'emergenza sanitaria
2020
The article deals with the problem of the legal nature of the d.P.C.M., the act enacted by the government after the declaration of the health emergency. In particular, the paper aims at investigating the debate around the technical re- quirements in the political decision and the judicial review on the administra- tive measure, in order to verify their compliance with the Constitution.
Sull'educazione del pittore storico odierno italiano pensieri di Pietro Selvatico (Padova, Seminario 1842), postfazione e indici a cura di Alexander …
2007
Commented fac-simile edition of Pietro Selvatico Estense's handbook of history painting «Sull'educazione del pittore storico odierno italiano» (1842).
Una perifrasi traduttiva per una regina rimossa. Torsioni onomastiche in "Cima delle nobildonne" di Stefano D'Arrigo
2020
Molto si è scritto sulla “lingua horcynusa” di Stefano D’Arrigo e del suo maestoso Horcynus Orca, romanzo in cui si battezza un nuovo codice linguistico fondato sulla stratificazione e sulla neologia virtuosistica il cui scopo non è tanto indicare con precisione, quanto evocare. Assai meno studiato, probabilmente per il ricorso ad una lingua asciutta, scientifica, quasi anonima, risulta il romanzo epigono della sua carriera letteraria, Cima delle nobildonne, apparso dopo una lunga pausa decennale nel 1985. Le ragioni del titolo stanno tutte nella volontà/opportunità/necessità di celare l’antroponimo che ha ispirato la narrazione, quello dell’unica donna faraone dell’antico Egitto, Hatshepsu…
Shake-table testing of a stone masonry building aggregate: overview of blind prediction study
2023
Bulletin of earthquake engineering (2023). doi:10.1007/s10518-022-01582-x special issue: "Adjacent Interacting Masonry Structures"
On the hydro-mechanical behaviour of remoulded and natural Opalinus Clay shale
2016
The geo-energy sector makes use of advanced technologies such as shale gas extraction, CO2 sequestration and nuclear waste geological disposal that rely on the exploitation of shale formations. Due to the great depths involved in these applications and the difficulties in retrieving intact samples, remoulded shale specimens are often adopted for hydro-mechanical testing. Remoulded and intact shales may substantially differ in their hydro-mechanical behaviour due to the particular structure of the natural material, which is the result of diagenesis and burial history. This paper presents an experimental campaign aimed at (i) characterizing the role of diagenesis and depth for Opalinus Clay s…
A smeared seismicity constitutive model
2004
The classical application of rate and state dependent frictional constitutive laws has involved the instabilities developed between two sliding surfaces. In such a situation, the behaviour and evolution of asperities is the controlling mechanism of velocity weakening. However, most faults have a substantial thickness and it would appear that it is the bulk behaviour of the fault gouge, at whatever scale, that is important. The purpose of this paper is to explore how bulk frictional sliding behaviour may be described. We explore here the consequences of applying the rate and state framework initially developed to describe the frictional behaviour at the interface between two interacting slid…
Ice deformed in compression and simple shear: control of temperature and initial fabric
2012
AbstractLayered and polycrystalline ice was experimentally deformed in general shear involving axial compression (strain magnitude 0.5-17%) and simple shear (strain magnitude γ = 0.1-1.4). As the temperature is increased from -20°C to -2°C, there is at least a twofold enhancement in octahedral shear strain rate, which coincides with the onset of extensive dynamic recrystallization and a change in grain-size distribution at -15°C. Between -150C and -10°C the c-axis preferred orientation rapidly evolves with the initiation of two-maxima fabrics in shear zones. From -10°C to -2°C there is progressive evolution of a final c-axis pattern that is asymmetric with respect to the direction of shorte…
A Shoreline model for breaking waves
2011
In order to simulate the wave motion and, in turn, the flow, within the nearshore region, in the last decades the derivation and the application of depth-integrated type of models have been widely investigated and developed. However, in such models, the problems of facing wave breaking and the moving shoreline are not trivial and therefore several approaches have been proposed. About wave breaking, approaches both based on the adoption of an artificial eddy viscosity Zelt (1991) and on the concept of roller Veeramony (2000), Karambas (2003), Musumeci (2005) have been implemented. As regards the shoreline boundary condition, a couple of numerical techniques have been mainly adopted, namely t…
Field run-up measurements: Calibration of a physically based lagrangian shoreline model
2012
In the present contribution a measurement technique based on video imaging has been selected for the assessment of the maximum run-up. Such measurements have been used for the calibration of a numerical model and of an empirical formulation. The on-site run-up measurements have been carried out at “Lido Signorino” beach, near Marsala, Italy. The positions of the swash have been localized on a transect, normal to the shore, constituted by stakes placed at 0.5 m intervals each other. The video camera was placed orthogonally to the line of the stakes. For the numerical simulations a 1DH Boussinesq-type of model for breaking waves has been applied which takes into account the wave run-up by a L…
Active Learning Methods for Efficient Hybrid Biophysical Variable Retrieval
2016
Kernel-based machine learning regression algorithms (MLRAs) are potentially powerful methods for being implemented into operational biophysical variable retrieval schemes. However, they face difficulties in coping with large training data sets. With the increasing amount of optical remote sensing data made available for analysis and the possibility of using a large amount of simulated data from radiative transfer models (RTMs) to train kernel MLRAs, efficient data reduction techniques will need to be implemented. Active learning (AL) methods enable to select the most informative samples in a data set. This letter introduces six AL methods for achieving optimized biophysical variable estimat…