On a generalization of the Dvoretzky-Wald-Wolfowitz theorem with an application to a robust optimization problem

A generalization of the Dvoretzky-Wald-Wolfowitz theorem to the case of conditional expectations is provided assuming that the $\sigma$-field on the state space has no conditional atoms.Comment: 10 page

3D geothermal modelling of the Mount Amiata hydrothermal system in Italy

In this paper we build a subsurface model that helps in visualizing and understanding the structural framework, geology and their interactions with the Mt. Amiata geothermal system. Modelling in 3D provides the possibility to interpolate the geometry of structures and is an effective way of understanding geological features. The 3D modelling approach appears to be crucial for further progress in the reconstruction of the assessment of the geothermal model of Mt. Amiata. Furthermore, this model is used as the basis of a 3D numerical thermo-fluid-dynamic model of the existing reservoir(s). The integration between borehole data and numerical modelling results allows reconstructing the temperature distribution in the subsoil of the Mt. Amiata area. Keywords

PIXE mapping on multiphase fluid inclusions in endoskarn xenoliths of AD 472 eruption of Vesuvius (Italy)

In this work we report a microthermometric and proton-induced X-ray emission (PIXE) mapping investigation on multiphase fluid inclusions hosted within nepheline and clinopyroxene of endoskarn xenoliths present in the deposits of the AD 472 eruption of Vesuvius. PIXE mapping on magmatic fluid inclusions repesents a useful tool for the characterization of the composition of magma derived fluids, exsolved from active magma chambers. In fluid inclusions we observed the occurrence of widespread solid phases formed by Fe, Pb, Zn, As ± Cu ± Mn, suggesting the good metal transport capability of Vesuvius magmatic fluids, which interacted with carbonate country rocks leading to the formation of endoskarn

Deformation and fluid flow in the Munsiari Thrust (NW India): A preliminary fluid inclusion study

A fluid inclusion study was carried out on quartz veins deformed during the activity of the Munsiari Thrust in the Garhwal Himalaya (India, Western Himalaya). These veins are hosted in mylonitic phyllites, with a greenschist mineral assemblage made of quartz-white mica-biotite-chlorite-epidote and minor calcite and plagioclase. Within the veins two groups of isolated “early fluid” inclusions and trails of small secondary fluid inclusions have been observed. Two types of inclusions preserved in isolated groups have been petrographycally recognized: (i) a two liquids and a vapor phase (L1+L2+V) that is the most common type and (ii) a less frequent liquid and a vapor phase (L+V). Both types of fluid inclusions were investigated through optical microthermometric experiments. For “early fluid” inclusions, assuming a trapping temperature based on quartz dynamic recrystallization mechanisms and previous P-T estimates, in the range of 500-520 °C, a corresponding trapping pressure in the range of c. 0.50-0.53 GPa is estimated. The trapping pressure range evaluated in the present contribution support that these fluid inclusions have been entrapped during the early stages of the activity of the Munsiari Thrust

The integration of 3D modeling and simulation to determine the energy potential of low-temperature geothermal systems in the Pisa (Italy) sedimentary plain

Shallow, low-temperature geothermal resources can significantly reduce the environmental impact of heating and cooling. Based on a replicable standard workflow for three-dimensional (3D) geothermal modeling, an approach to the assessment of geothermal energy potential is proposed and applied to the young sedimentary basin of Pisa (north Tuscany, Italy), starting from the development of a geothermal geodatabase, with collated geological, stratigraphic, hydrogeological, geophysical and thermal data. The contents of the spatial database are integrated and processed using software for geological and geothermal modeling. The models are calibrated using borehole data. Model outputs are visualized as three-dimensional reconstructions of the subsoil units, their volumes and depths, the hydrogeological framework, and the distribution of subsoil temperatures and geothermal properties. The resulting deep knowledge of subsoil geology would facilitate the deployment of geothermal heat pump technology, site selection for well doublets (for open-loop systems), or vertical heat exchangers (for closed-loop systems). The reconstructed geological-hydrogeological models and the geothermal numerical simulations performed help to define the limits of sustainable utilization of an area's geothermal potential

Preparation and characterisation of bioartificial and conductive patches for myocardial regeneration.

The goal of the project is the preparation and development of integrated patches with adequate characteristics to be used in myocardium tissue regeneration on the basis of morphological, mechanical and degradation characterization, mimicking anisotropic structure and mechanical properties of the myocardium. A crucial objective of this work was also to develop a scaffold addressing an important strategy of therapies in human cardiology.Towards this goal, we thought to produce biodegradable nanoparticles able to release in a controlled manner a recruitment factor of stem cell to allow vascularization and cardioprotection

Tracing volatile exsolution within the 472 AD "Pollena" magma chamber of Vesuvius (Italy) from melt inclusion investigation

This paper reports the volatile contents of melt inclusions from juvenile (Lc-phonolite to phonotephrite) and cognate xenoliths from the 472 AD eruption of Vesuvius. This enables us to infer on pre-eruptive volatile content of magmas that fed the eruption and to trace the volatile behavior in the chamber and at its peripheral parts. Different types of inclusions were identified within both juvenile fragments and cognate xenoliths and subsequently analyzed for major elements and volatile contents. The water contents of melt inclusions from juvenile fractions indicate trapping pressures of about 95 MPa, corresponding to a magma chamber at approximately 3.5–4.5 km depth. The degassing of H2O, Cl, and S from melt within the 472 AD magma chamber is highlighted by the compositions of melt inclusions. In contrast, F was not partitioned into volatile phases and was instead concentrated in melts within the upper portions and periphery (solidification front) of the chamber. The chemistry of melt inclusions from the solidification front of the magma chamber indicates that the system was saturated with a hydrous chloride phase that directly exsolved from melt as a hypersaline aqueous fluid phase