1,046 research outputs found
Glacial risks monitoring and management
No full textThe executive PhD project that has been held between the Fondazione Montagna sicura (FMS) and the University of Pavia, carried out by myself as the principal investigator, has been conceived in order to pursue research and development activities on the topic of the monitoring and the understanding of the dynamics and processes leading to glacial instabilities and glacial risks (Faillettaz et al., 2016; Faillettaz et al., 2015). The involvement of the CNR IRPI Section of Turin, GMG “Geohazard Monitoring Group” was fundamental in the integration of historical monitoring data and experimental activities on specific monitoring sites as well as their great input coming from their expertise in the monitoring of natural hazards and the development of innovative monitoring solutions. The research topic of the project comes from a need: even tough in the last years great improvements have been made with the use of new technologies, many times when a road closure or houses have to be evacuated for a potential glacial instability, still large uncertainties are present in many steps of the monitoring and the subsequent decision-making process. Therefore, the need for a strong integration of research activity into risk management has become a priority. In this frame, the “monitoring” side (that is mainly represented as the private investor of the PhD project, the Fondazione Montagna sicura) represents the applied side of the scientific project, while the understanding of the processes resides more on the pure scientific side that is more affine to the academic part represented by the University. The joint efforts that were put together in this frame well represent the structure of the executive PhD that should join the industry and the academia in a pathway of research and development around a common subject of interest. In the field of glacial hazards, a great leap forward for both the scientific community and policy makers involved in the managing and monitoring of glacial risk situations, has been made in recent years by the intergovernmental study group Gaphaz, with its creation first, and later with the very relevant publication of: “Assessment of Glacier and Permafrost Hazards in Mountain Regions, Technical guidance document” (Allen et al., 2022). This document, synthetises a large number of information related to destabilization phenomena in high mountain environment. A large part of the work analyses risks of glacial origin and cascading processes which will be the focus of the present work. Nonetheless, the Gaphaz document carefully describes phenomena and largely treats the early individuation of hazards and possible modelling approaches for the definition of risk scenarios. The scientifical community should refer worldwide to this document, for guidelines on an early hazard detection and a preliminary definition of risk scenarios, which represent the core of the Gaphaz work. Nonetheless, what is not comprised in this document refers to everything that happens when, on a specific site, a hazardous situation is detected, and highly destructive impacts are estimated by means of modelling approaches (Emmer et al., 2022; Mergili et al., 2020). Therefore, what comes into play is the “monitoring” phase of the phenomenon (Faillettaz et al., 2016; Pralong & Funk, 2006), and this part of the process represents the main topic of the present work. The final steps of the Gaphaz document give some indications and also some examples of what kind of approach could be used for further investigation (a general indication of possible approach is given, but not further developed) of specific sites, but this does not go into a critical analysis of existing approaches and methodologies, pros and cons, their limits, their cost and other important details. The relevance of the present work, I believe resides in the aim of screening the state of the art and deepening knowledge in this specific topic.The executive PhD project that has been held between the Fondazione Montagna sicura (FMS) and the University of Pavia, carried out by myself as the principal investigator, has been conceived in order to pursue research and development activities on the topic of the monitoring and the understanding of the dynamics and processes leading to glacial instabilities and glacial risks (Faillettaz et al., 2016; Faillettaz et al., 2015). The involvement of the CNR IRPI Section of Turin, GMG “Geohazard Monitoring Group” was fundamental in the integration of historical monitoring data and experimental activities on specific monitoring sites as well as their great input coming from their expertise in the monitoring of natural hazards and the development of innovative monitoring solutions. The research topic of the project comes from a need: even tough in the last years great improvements have been made with the use of new technologies, many times when a road closure or houses have to be evacuated for a potential glacial instability, still large uncertainties are present in many steps of the monitoring and the subsequent decision-making process. Therefore, the need for a strong integration of research activity into risk management has become a priority. In this frame, the “monitoring” side (that is mainly represented as the private investor of the PhD project, the Fondazione Montagna sicura) represents the applied side of the scientific project, while the understanding of the processes resides more on the pure scientific side that is more affine to the academic part represented by the University. The joint efforts that were put together in this frame well represent the structure of the executive PhD that should join the industry and the academia in a pathway of research and development around a common subject of interest. In the field of glacial hazards, a great leap forward for both the scientific community and policy makers involved in the managing and monitoring of glacial risk situations, has been made in recent years by the intergovernmental study group Gaphaz, with its creation first, and later with the very relevant publication of: “Assessment of Glacier and Permafrost Hazards in Mountain Regions, Technical guidance document” (Allen et al., 2022). This document, synthetises a large number of information related to destabilization phenomena in high mountain environment. A large part of the work analyses risks of glacial origin and cascading processes which will be the focus of the present work. Nonetheless, the Gaphaz document carefully describes phenomena and largely treats the early individuation of hazards and possible modelling approaches for the definition of risk scenarios. The scientifical community should refer worldwide to this document, for guidelines on an early hazard detection and a preliminary definition of risk scenarios, which represent the core of the Gaphaz work. Nonetheless, what is not comprised in this document refers to everything that happens when, on a specific site, a hazardous situation is detected, and highly destructive impacts are estimated by means of modelling approaches (Emmer et al., 2022; Mergili et al., 2020). Therefore, what comes into play is the “monitoring” phase of the phenomenon (Faillettaz et al., 2016; Pralong & Funk, 2006), and this part of the process represents the main topic of the present work. The final steps of the Gaphaz document give some indications and also some examples of what kind of approach could be used for further investigation (a general indication of possible approach is given, but not further developed) of specific sites, but this does not go into a critical analysis of existing approaches and methodologies, pros and cons, their limits, their cost and other important details. The relevance of the present work, I believe resides in the aim of screening the state of the art and deepening knowledge in this specific topic
Glacier thickness modelling and monitoring with geophysical data constraints: A case study on the Indren Glacier (NW Italy)
No full textThe ongoing global temperature increase has accelerated the mass loss of glaciers worldwide, with Italian alpine glaciers being particularly vulnerable due to their small size, complex geometries and exposition that implies a fast reaction to thermal and hydrological modifications. In such a frame, the Indren Glacier (Aosta Valley, north-western Italian Alps) provides a valid test site to check the thickness evolution over the last two decades (1999–2020), through an integrated approach combining historical data, on-site geophysical measurements, remote sensing surveys, modelling and temperature analysis. Using a 2018 helicopter-based photogrammetric survey and Ground Penetrating Radar (GPR) survey campaigns of 2020, we obtained new input data and constraints to build up an updated thickness model for the whole glacier through the Glacier Thickness Estimation algorithm (GlaTE). Ice thickness is indeed a key parameter to estimate the ice volume and use it as further input in evolutionary models forecasting future scenarios. As a part of this integrated approach, we also analysed remote sensing and temperature data, finding a major modification in the glacier conditions over the last decade. Further comparing these results with previous studies, we identified a significant decrease in ice thickness, and we confirmed the presence of an over-deepening in the glacier central widest part. This integrated methodology enhances our understanding of glacier dynamics and improves predictions of future changes, offering crucial insights for managing water resources and mitigating natural hazards in the alpine region
Large-signal device simulation in time- and frequency-domain: a comparison
No full textThe aim of this paper is to compare the most common time- and frequency-domain numerical techniques for the determination of the steady-state solution in the physics-based simulation of a semiconductor device driven by a time-periodic generator. The shooting and harmonic balance (HB) techniques are applied to the solution of the discretized drift-diffusion device model coupled to the external circuit embedding the semiconductor device, thus providing a fully nonlinear mixed mode simulation. The comparison highlights the strong and weak points of the two approaches, basically showing that the time-domain solution is more robust with respect to the initial condition, while the HB solution provides a more rapid convergence once the initial datum is close enough to the solution itsel
Mutazione della proteina SP-C: una causa insolita di sindrome da distress respiratorio
No full textNo abstrac
PERIGLACIAL CASCADING PROCESS IN AN ALPINE ENVIRONMENT: AN EXAMPLE OF AN ICE AVALANCHE-INDUCED DEBRIS FLOW IN FERRET VALLEY (COURMAYEUR, ITALY)
No full textOn 23 June, 2022, a debris flow occurred in the Montitaz Stream (Mont Blanc area), which flows off the Planpincieux Glacier snout. destroyed the bridge that links the hamlets of Planpincieux and chefort. Using a multi-source dataset from UAV, satellite and terrestrial sensors belonging to the Planpincieux Glacier monitoring network, reconstructed the series of events that led to the debris flow. We found evidence that this resulted from a cascading process which started an ice avalanche of 4200 m3 falling over a reformed glacieret that 500 m downstream from the glacier front. Subsequently, the deposited ice avalanche formed an unstable ice dam along the Montitaz Stream riverbed, causing a mixed accumulation of water and ice debris. Finally, the dam collapsed, originating a debris flow consisting of ice, water debris from the glacial fan. DEM differencing showed that approximate- ly 14,000 m3 of material were
mobilised overall
A note on the author citation and typification of Cineraria aurantiaca Hoppe (Tephroseris integrifolia subsp. aurantiaca; Asteraceae)
No full textBartolucci, Fabrizio, Villani, Mariacristina, Galasso, Gabriele (2021): A note on the author citation and typification of Cineraria aurantiaca Hoppe (Tephroseris integrifolia subsp. aurantiaca; Asteraceae). Phytotaxa 512 (4): 297-299, DOI: 10.11646/phytotaxa.512.4.6, URL: http://dx.doi.org/10.11646/phytotaxa.512.4.
Riscrivere La buona novella di Fabrizio De André in siciliano:
No full textDuring 2021 the indipendent label Musica del Sud released the sicilian adaptation of Fabrizio De André's La buona Novella, which was first published in 1970. The article therefore presents an interview with Francesco Giunta, author of the project and the translation, and makes use of the valuable conversation with Ignazio Macchiarella, in order to explore the depth of the work in its musical, literary and linguistic nuances.
Nel 2021 l'etichetta indipendente Musica del Sud ha pubblicato il riadattamento in siciliano de La buona Novella di Fabrizio De André, uscito per la prima volta nel 1970.
L'articolo presenta dunque l'intervista a Francesco Giunta, l'autore del progetto e della traduzione, e si avvale del prezioso dialogo con Ignazio Macchiarella, condotto allo scopo di indagare la profondità dell'opera nelle sue sfaccettature musicali, letterarie e linguistiche. 
A new study on the Newell-Whitehead-Segel equation with Caputo-Fabrizio fractional derivative
No full textIn this research, we propose a new numerical method that combines with the Caputo-Fabrizio Elzaki transform and the q-homotopy analysis transform method. This work aims to analyze the Caputo-Fabrizio fractional Newell-Whitehead-Segel (NWS) equation utilizing the Caputo-Fabrizio q-Elzaki homotopy analysis transform method. The Newell-Whitehead-Segel equation is a partial differential equation employed for modeling the dynamics of reaction-diffusion systems, specifically in the realm of pattern generation in biological and chemical systems. A convergence analysis of the proposed method was performed. Two-dimensional and three-dimensional graphs of the solutions have been drawn with the Maple software. It is seen that the resulting proposed method is more powerful and effective than the Aboodh transform homotopy perturbation method and conformable Laplace decomposition method in the results. © 2024 the Author(s), licensee AIMS Press
Fabrizio De André e altri cantautori: Italia-Brasile in musica
No full textThe Author wants to compare and find convergence points between Brazilian and Italian music. For Italy a more detailed look will be directed to the production of Fabrizio De André and particularly to the song Princesa, a sad story of marginalization, poverty and violence, in which a part quite considerable is written in portuguese. In De André lyrics there are often rhythms and references to latin-americans musical sounds.La Autora quiere comparar y encontrar puntos de convergencia entre la música brasileña y la italiana. Para Italia un análisis más detallado tendrá como objetivo la producción de Fabrizio De André y en particular la canción Princesa, triste historia de marginación, pobreza, violencia, en la que una parte bastante considerable está escrita en portugués. En los textos de De André a menudo hay rirmos y referências en sonidos musicales latinoamericanos.L’Autrice mette a confronto e cerca di trovare punti di convergenza tra la musica brasiliana e quella italiana. Per l’Italia uno sguardo più dettagliato è rivolto alla produzione di Fabrizio De André e in particolare alla canzone Princesa, triste storia di emarginazione, povertà, violenza, nella quale una parte abbastanza considerevole è scritta in portoghese. Nei suoi testi ci sono spesso ritmi e riferimenti alle sonorità musicali latinoamericane
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