DSpace Collection:http://hdl.handle.net/2122/692024-03-04T17:58:25Z2024-03-04T17:58:25ZThe Viscosity of Carbonate‐Silicate Transitional Melts at Earth's Upper Mantle Pressures and Temperatures, Determined by the In Situ Falling‐Sphere TechniqueStagno, VincenzoKono, YoshioStopponi, VeronicaMasotta, MatteoScarlato, PiergiorgioManning, Craig Ehttp://hdl.handle.net/2122/144632021-11-08T09:10:13Z2020-01-01T00:00:00ZTitle: The Viscosity of Carbonate‐Silicate Transitional Melts at Earth's Upper Mantle Pressures and Temperatures, Determined by the In Situ Falling‐Sphere Technique
Authors: Stagno, Vincenzo; Kono, Yoshio; Stopponi, Veronica; Masotta, Matteo; Scarlato, Piergiorgio; Manning, Craig E
Abstract: The circulation of carbon in Earth’s interior occurs through the formation, migration, and ascent of CO2‐
bearing magmas throughout the convective mantle. Their chemical composition spans from carbonatitic to
kimberlitic as a result of either temperature and pressure variations or local redox conditions at which partial
melting of carbonated mantle mineral assemblages occurs. Previous experiments that focused on melting relations
of synthetic CO2‐bearing mantle assemblages revealed the stability of carbonate‐silicate melts, or transitional
melts, that have been generally described to mark the chemical evolution from kimberlitic to carbonatitic
melts at mantle conditions. The migration of these melts upward will depend on their rheology as a function of
pressure and temperature. In this study, we determined the viscosity of carbonate‐silicate liquids (~18 wt% SiO2
and 22.54 wt% CO2) using the falling‐sphere technique combined with in situ synchrotron X‐ray radiography.
We performed six successful experiments at pressures between 2.4 and 5.3 GPa and temperature between 1565 °C
and 2155 °C. At these conditions, the viscosity of transitional melts is between 0.02 and 0.08 Pa˙s; that is, about
one order of magnitude higher than what was determined for synthetic carbonatitic melts at similar P‐T conditions,
likely due to the polymerizing effect of the SiO2 component in the melt.2020-01-01T00:00:00ZA Design Approach to Support BIM for Existing StructuresCicconi, PRaffaeli, R.Borghi, Alessandrahttp://hdl.handle.net/2122/127122019-09-19T20:46:25Z2019-01-01T00:00:00ZTitle: A Design Approach to Support BIM for Existing Structures
Authors: Cicconi, P; Raffaeli, R.; Borghi, Alessandra
Abstract: Nowadays, Building Information Modeling (BIM) is a common design approach to support the life cycle of projects in the field of Architecture Engineering Construction (AEC). New constructions’ projects require a BIM modeling to provide digital information within a 3D digital mockup. The main target is to reduce time and cost related to the elaboration of additional and not integrated documentation. This issue is also common in projects focused on the renovations of existing buildings. In fact, the BIM approach provides tools to improve interoperability between different software to integrate analysis and simulations within the architectural representation. The renovation projects require reverse engineering tools and methods for the 3D modeling of existing structures. One of the issues concerns the digital photogrammetric survey of glass surfaces. This paper proposes a design approach to support BIM phases for already existing structures with a test case focused on a hallway with a continuous glass wall.2019-01-01T00:00:00ZA new monitoring strategy to control land movements. The Veneto Region test areaCarbognin, LauraRizzetto, FedericaTosi, LuigiStrozzi, TazioTeatini, PietroVitturi, Andreahttp://hdl.handle.net/2122/104642017-04-04T12:49:12Z2005-01-01T00:00:00ZTitle: A new monitoring strategy to control land movements. The Veneto Region test area
Authors: Carbognin, Laura; Rizzetto, Federica; Tosi, Luigi; Strozzi, Tazio; Teatini, Pietro; Vitturi, Andrea
Editors: Agen, Zhang; Shiliang, Gong; Carbognin, Laura; Johnson, A. Ivan
Abstract: Anthropogenic land subsidence has widely been affecting the Veneto Region, northern Italy, since the past
century. Groundwater withdrawals for industriai, domestic, and agri cultura! uses, exploitation of minerai
water, thermal water for health treatment, methane-bearing water, and peat oxidation in reclaimed farmlands
produced a land settlement varying in time and space throughout the area. Moreover, natural consolidation of
the Quaternary deposits and tectonics of the pre-Quaternary basement contribute to increase ground surface
lowering. Different survey techniques, with different characteristics; have been adopted to contro! land
subsidence. To overcome the limits that characterize each single method and to enlarge the knowledge on
regional land subsidence, an integrated monitoring method has been designed to accurately and reliably keep
land movements under contro! in the study area. We combine five earth observation techniques, i.e. spirit
leveling, Continuous Global Positioning System (CGPS), Differential GPS (DGPS), Interferometric
Synthetic Aperture Radar (InSAR), and Interferometric Point Target Analysis (IPTA), together over about the
last ten-years, and homogenized and integrated their results in both the time and space domains. The
application of this Subsidence Integrated Monitoring System (SIMS) provides a new complete and
dependable picture ofthe vertical displacements in the Veneto Region never available before.2005-01-01T00:00:00ZSAR Interferometric Point Target analysis and application to the monitoring of land subsidence in the Venice LagoonStrozzi, TazioWegmüllerWe, UrsWerner, CharlesTeatini, PietroTosi, Luigihttp://hdl.handle.net/2122/104432017-04-04T10:43:30Z2005-01-01T00:00:00ZTitle: SAR Interferometric Point Target analysis and application to the monitoring of land subsidence in the Venice Lagoon
Authors: Strozzi, Tazio; WegmüllerWe, Urs; Werner, Charles; Teatini, Pietro; Tosi, Luigi
Editors: Agen, Zhang; Shiliang, Gong; Carbognin, Laura; Johnson, A.Ivan
Abstract: In the Interferometric Point Target Analysis (IPTA) point-like targets that remain phase coherent over time
are identified in a sequence of satellite Synthetic Aperture Radar (SAR) images and used to estimate the
progressive deformation ofthe terrain with millimetric accuracy. Building upon conventional interferometric
SAR techniques, IPT A overcomes atrnospheric delay anomalies and tempora! and geometrie decorrelation by
exploring the tempora! and spatial characteristics of radar interferometric signatures collected from point
targets widely available over urban areas but that can be also found scattered outside cities and villages. In
this contribution the application of IPT A to the monitoring of land' subsidence in the urban and littoral
environments of the Venice Lagoon is described. The results achieved using ali the available ERS SAR
images acquired between 1992 and 2000 are very significant due to the achieved target spatial and tempora!
coverage.2005-01-01T00:00:00Z