1,721,057 research outputs found
Un ciclo virtuoso della cooperazione istituzionale per il contrasto dei crimini ambientali: dalla ricerca applicata alla validazione e standardizzazione di metodi e tecnologie nelle indagini di scenario
No full textConsiderations on all composite UAV structures: critical analisys and new proposals
No full textThis paper will introduce some consideration about the use of composite structures for the Unmanned Aerial Vehicles, and the main problems about the use of this type of construction will be analysed starting from my last direct experience. These considerations derive from the last activities in progress at the Department of Aeronautical Engineering of University of Naples, and in particular with the Aeronautical Construction Group directed from Prof. A. Accardo. During last years, experience has been acquired with the realization of a small advanced composite unmanned aircraft named "Federica". The phases followed for the design and the construction of this vehicle have been the same of those normally followed for a standard aircraft of the general aviation: Mission configuration options, Wind tunnel tests, Choice of material, Loads structural, Preliminary sizing, Performance determination, Structural design and test (CAD, FEM), Constructive plans of single parts, Systems definition, Single parts construction, Static tests, Acquisition and installation of the propulsion system, Assemblage, Systems installation and setup, Flight tests organization and realization, Post processing of data acquired during flight and theoretical model validation. Today, after about 2 year of flight tests, this vehicle is able to perform a limited surveillance mission and it has onboard about 30 sensors for on-flight data acquisition. On the basis of the experience gained and according to the necessity to operate with such systems in safe conditions, the design of a new larger UAV is currently in progress. Waiting the official start of new project (about the end of 2004) we have prepared the version B of Federica and it will be ready to fly before the end of July. In this version a lot of new solutions will be tested before of their definitive application in our new larger UAV. Departing from a synthetical description of these projects, we will make a critical analysis on these technologies; in particular we will underline the problems concerning the "hybrid" links (composite/aluminium) and the solutions from us adopted in the last projects
Analisi sperimentale per la determinazione dei parametri di volo di un velivolo “unmanned”: allestimento degli impianti e prove di volo
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La termografia nel monitoraggio ambientale: tecniche avanzate di indagine da piattaforma aerea
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Quantifying the environmental impact of pollutant plumes from coastal rivers with remote sensing and river basin modelling
No full textCoastal regions contaminated by polluted river water leaving inland river basins can be difficult to monitor due to their size and remoteness, but it is important to quantify the impact of such pollution to manage for coastal sustainability. In this research, we demonstrate how river plumes can be monitored and analysed by a combination of remote sensing and river basin modelling to estimate their spatial, temporal, and water quality characteristics. Our results show that multispectral remote sensing is able to differentiate the water quality characteristics and two-dimensional spatial characteristics between plumes from four discharge locations along the coast of Campania, Italy. Our results also show that river basin modelling, when informed by land cover, land use and wastewater treatment plant (WWTP) data, is able to estimate the plume volume, and pollutant load, attributed to rainfall-runoff and wastewater-discharge for each of the discharges. This research documents a new method for combining remote sensing and watershed modelling to quantify the environmental impact of pollution from coastal rivers
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