INTERFEROMETRIA RADAR E MODELLAZIONE FDEM PER LO STUDIO DI FRANE IN ROCCIA: UN ESEMPIO DI APPLICAZIONE

Nella presente nota verrà illustrato un esempio di applicazione della tecnica interferometrica radar da terra (GBInSAR) e di modelli numerici avanzati di tipo combinato elementi finiti-elementi distinti (FDEM) per lo studio del cinematismo e della propagazione di una frana in roccia nell'Appennino umbro (Torgiovannetto di Assisi -PG). Con riferimento al caso di studio saranno mostrati i risultati del monitoraggio radar che hanno consentito di delimitare l'area interessata dagli spostamenti e di individuare nel cuneo in frana spostamenti differenziali non noti precedentemente. Al contempo saranno mostrati i risultati dell'analisi di scenario effettuata tramite i modelli numerici FDEM che, opportunamente tarati, hanno consentito di ricostruire i meccanismi di innesco, la possibile evoluzione e la distanza di propagazione dei fenomeni oggetto di studi

Monitoring geotechnical structures by ground based radar interferometry

This paper describes two novel remote sensing techniques based on radar sensors, respectively the Synthetic Aperture Radar (SAR) and the Real Aperture Radar (RAR), and some applications to relevant geotechnical problems with the aim to demonstrate the outcomes these types of sensors can provide. The case studies here described show how the SAR technique can provide useful information to interpret landslides’ kinematics and how the RAR can be used to monitor dam displacements and tunnels’ convergences

Quantum Dots Synthesis Through Direct Laser Patterning: A Review

In this brief review the advances on Direct Laser Patterning (DLP) for the synthesis of photo-luminescent semiconductor quantum dots (QDs) belonging to II-VI groups, especially in solid state using laser-assisted conversion are reported and commented. The chemistry of the precursor synthesis is illustrated because it is a crucial step for the development of the direct laser patterning of QDs. In particular, the analysis of cadmium (bis)thiolate and cadmium xanthates precursors after thermal and laser treatment is examined, with a special focus on the optical properties of the formed QDs. The second part of the review examines how the laser parameters such as the wavelength and pulse duration may regulate the properties of the patterned QDs. The DLP technique does not require complex laser systems or the use of dangerous chemical post treatments, so it can be introduced as a potential method for the patterning of pixels in quantum dot light emitting diodes (QD-LEDs) for display manufacturing

Early warning monitoring of natural and engineered slopes with Ground-Based Synthetic Aperture Radar

The first application of ground-based interferometric synthetic-aperture radar (GBInSAR) for slope monitoring dates back 13 years. Today, GBInSAR is used internationally as a leading-edge tool for near-real-time monitoring of surface slope movements in landslides and open pit mines. The success of the technology relies mainly on its ability to measure slope movements rapidly with sub- millimetric accuracy over wide areas and in almost any weather conditions. In recent years, GBInSAR has experienced significant improvements, due to the development of more advanced radar techniques in terms of both data processing and sensor performance. These improvements have led to widespread diffusion of the technology for early warning monitoring of slopes in both civil and mining applications. The main technical features of modern SAR technology for slope monitoring are discussed in this paper. A comparative analysis with other monitoring technologies is also presented along with some recent examples of successful slope monitorin

Dependence of sub-micron vaterite container release properties on pH and ionic strength of the surrounding solution

We report on the synthesis and characterization of porous monodisperse vaterite containers with controllable average sizes from 400 nm to 10 mu m. Possible release strategies of enclosed substances via recrystallization or by pH-change are presented. As a model experiment, a fluorescent marker was encapsulated and imaged by two-photon microscopy to monitor the dye release. The release process was found to be controllable via the immersion medium's properties. Release times can be further tuned by covering the containers with additional polymer layers, creating a flexible system with promising perspectives for pharmaceutical applications

Thermal performance of a metro station in Turin equipped with energy geostructures

High pollution levels combined with the lack of green spaces are hitting many cities leading to the exploitation of the underground for transportation. Given the need to foster local energy sources with low environmental impact, energy geostructures are more and more being explored. In this context, the promising outcomes of the experimental campaign on the thermal activation of tunnel segments carried out on Turin ML1 South Extension encouraged the authors to investigate applicability of energy geostructures for Turin ML2 project. This paper is intended to focus on the understanding of the thermo-hydraulic behaviour of a metro station equipped with energy diaphragm walls. A 3D FE numerical model reproducing the layout of the planned Mole-Giardini Reali station is used to study the energy exchange potential of the thermoactive walls. The quantification of the exploitable energy to meet the user demands of the station and of buildings above will be discussed on the basis of the results obtained

INTERFEROMETRIA RADAR E MODELLAZIONE FDEM PER LO STUDIO DI FRANE IN ROCCIA: UN ESEMPIO DI APPLICAZIONE

Nella presente nota verrà illustrato un esempio di applicazione della tecnica interferometrica radar da terra (GBInSAR) e di modelli numerici avanzati di tipo combinato elementi finiti-elementi distinti (FDEM) per lo studio del cinematismo e della propagazione di una frana in roccia nell’Appennino umbro (Torgiovannetto di Assisi –PG). Con riferimento al caso di studio saranno mostrati i risultati del monitoraggio radar che hanno consentito di delimitare l’area interessata dagli spostamenti e di individuare nel cuneo in frana spostamenti differenziali non noti precedentemente. Al contempo saranno mostrati i risultati dell’analisi di scenario effettuata tramite i modelli numerici FDEM che, opportunamente tarati, hanno consentito di ricostruire i meccanismi di innesco, la possibile evoluzione e la distanza di propagazione dei fenomeni oggetto di studio

Using farmhouse and food to enforce a tourism sustainable development model: empirical evidence from Italy

Environmental sustainability plays a crucial role in influencing policy actions and people's behavior. The 2030 Agenda highlights the Sustainable Development Goals (SDGs), which can be achieved through tourism, particularly in its most sustainable form, such as ecotourism. Ecotourism provides an ideal platform for experimenting with new lifestyles oriented towards sustainability and well-being. Additionally, ecotourism emphasizes territorial identities, particularly through the promotion of food and wine, which can contribute to the creation of sustainable tourism areas. Food quality production serves as evidence of the attention paid by producers to the sustainability of territories and a lifestyle that prioritizes well-being. European citizens are increasingly recognizing the environment as a resource for good living. In Italy, agritourism, which includes activities offered by 25 certified quality agricultural producers, is becoming increasingly popular among tourists. Within this context, sustainability can be experienced through tourism, which offers an opportunity to live differently. This paper examines two Italian regions (Tuscany and Apulia) where farmhouse, food and tourism (FFST) areas have been successfully implemented as a form of sustainable tourism. The study demonstrates that FFST areas can be defined using spatial analysis, and then can become a model for sustainable tourism development. In conclusion, environmental sustainability holds ethical significance and can be achieved through tourism, specifically through ecotourism and FFST areas, which enable tourists to experience sustainable lifestyles while emphasizing territorial identities

experimental and modeling analysis of air and co2 biomass gasification in a reverse lab scale downdraft gasifier

Abstract This research work aims at investigating the effect of carbon dioxide feed in biomass gasification as a possible way to directly exploit the exhaust gas from the engine of combined heat and power systems to convert carbon dioxide to carbon monoxide via Boudouard reaction and consequently increase the carbon conversion and reduce char yield. The effects on biomass gasification using air, and air diluted with carbon dioxide were assessed in a reverse downdraft lab-scale gasifier utilizing 2 kg of pelletized biomass. This reactor is mounted on a digital weighing balance which enables the recording of mass loss during the gasification process. Furthermore, the mixture of air and CO2 is obtained from two mass flow controllers which enable constant and desired flux of gasifying agents across the gasifier. At the same time, an in-house developed thermodynamic equilibrium model was applied to predict the gas composition and char output. Unlike the classical equilibrium strategy that calculates the gasification products using the Gibbs energy minimization method at fixed temperature and pressure, the current approach is based on the enthalpy of the reactants, analogous to the adiabatic combustion temperature. Also, a correction factor accounting for the heat losses, was implemented. The model outcome shows a good agreement with the experimental results, especially in terms of predicted char yields and trends of the dominant producer gas species. The same strategy was used to describe the behavior of the gasification system and estimate the quality of producer gas and the cold gas efficiency of the system