1,721,054 research outputs found
Analisi della situazione Idraulica e geologica della Val Canaglia
No full textContratto prot. n. 170 del 12 gennaio 2009 del Comune di Cogollo del Cengio (VI
Apparato per sonda geotermica, prima relazione tecnico-scientifica.
No full textIl rapporto descrive la attività di progetto e di realizzazione di un apparato sperimentale finalizzato allo studio dello scambio energetico tra sonde geotermiche e l'ambiente che le circonda. L'apparato permette di analizzare il comportamento di un metro di sonda geotermica in un ambiente costituito da solo fluido in quiete o in movimento, da solo materiale granulare, da materiale granulare e fluido in quiete o in movimento
Dynamic photogrammetric survey of moving granular masses at laboratory scale.
No full textThe experimental research is aimed at the description, with photogrammetric techniques, of the evolution of the surface of a moving granular mass, in order to contribute to the understanding of the rheology and to the calibration of physical-mathematical-numerical models. The experimental apparatus is constituted by two planes with adjustable inclination: an upstream plane, placed at the inclination of 27.5 °, and a downstream plane at the inclination of 6.5 °. Both planes are square-
shaped with side length of 1.5 m. A fixed volume of dry granular material is released on the upstream plane and followed up to its stop on the downstream plane. two different types of granular material have been used, characterized by different size and form factor. The article describes the degree of automation achieved in the methodological approach and manual work still needed with the hardware and software techniques adopted. Finally, the experimental results are presented for some significant tests as well as the achieved metric quality
Three-dimensional dynamic survey of moving granular masses with photogrammetric techniques.
No full textThe experimental research, carried out at the Laboratory of Applied Geology, Department of Geosciences of the University of Padua, investigates the possibility to describe, with photogrammetric techniques, the evolution of the surface of a moving granular mass. The study is inserted in the research activity aimed at understanding the phenomena of movement of dry and wet granular masses: dense snow avalanches, rock avalanches, debris flows. The obtained experimental data can contribute to the description of the material rheology and to the calibration of physical-mathematical-numerical models in view of their application in the field. The experimental apparatus consists of a support flume, eight digital cameras with fixed focal length lenses, a lighting system and a system for fast image acquisition. The synchronization of the survey of the frames from the cameras has been obtained by a NI hardware control system and a proper software written in LabView. The velocity of images transfer has been optimized using Raid technology. The paper describes the details of the designed experimental apparatus and some results
- …
