1,721,053 research outputs found
Rilievo LiDAR terrestre: Scala di Furno (Lecce)
No full textNell’ambito del progetto LEADER+ Puglia 2000/2006, programma di iniziativa comunitaria finalizzato alla promozione dello sviluppo integrato, endogeno e sostenibile delle aree rurali e la
valorizzazione di specifiche esperienze con i territori esterni, si è condotto un rilievo LiDAR terrestre di un insediamento protostorico risalente al periodo compreso tra l’Età del Bronzo e l’Età
del Ferro (XVIII-VIII sec. a.C.). La possibilità di valorizzare e al tempo stesso di rendere fruibile tale insediamento di facile deperibilità (in sito sabbioso) ha richiesto un rilievo di elevato dettaglio
finalizzato alla realizzazione di una copia dello scavo archeologico da posizionare in situ. Vista la complessità, per alcune aree, come quella della fornace, si è resa necessaria l’integrazione dei dati LiDAR con quelli provenienti da tecnica fotogrammetrica. Il rilievo integrato ha permesso di restituire un modello 3D numerico finalizzato alla successiva fase di prototipazione in scala 1:1Under the LEADER + project Puglia 2000/2006, the Community Initiative Program aimed at promoting the integrated, endogenous and sustainable development of rural areas and enhancement
of specific experiences with the external territories, has conducted a survey of terrestrial LiDAR of a protohistoric settlement dating to the period from the Bronze Age to the Iron age (XVIII-VIII
century BC.). The possibility of enhancing and, at the same time, to make enjoyable this settlement of perishable items (sandy site) required a highly detailed survey aimed at the realization of a copy
of the archaeological dig to be placed in situ. Given the complexity, for some areas, such as the furnace, it was necessary the integration of LIDAR data with those from photogrammetric
technique. The integrated survey allowed to get a 3D numerical model intended at the next stage of prototypes in 1:1 scal
MAGNETIC RESPONSE OF DAMAGED CARBON FIBER REINFORCED PLASTICS MEASURED BY HTS-SQUID MAGNETOMETER
No full textMonitoring and survey for testing the stability of a hydraulic engineering
No full textThe paper describes the survey stages of a masonry bridle, located in the ravine Gennarini-Leucaspide near Statte (Ta), part of a group of three bridle for the protection of the railway line along the SS 7. The intent is to check the charge condition of stability of the structure as it is no longer included in the left bank, it is subject to phenomena of soil excavating, compromising the static and causing partial collapse. These collapses, probably linked to the erosion of a portion of land for the movement of water, occurred on the structure since the year 1996 as a result of flood. It was designed a monitoring plan for one year to determine the horizontal and vertical hanging of both upstream and downstream of the bridle, in order to define the parameters of variation of the safety factor over time, especially in the alternation of rain and dry periods. Were carried out meticulous topographical surveys with traditional techniques using the total station Leica TS30 supplemented by framing operations through local GPS measurements and modeling of the structure through terrestrial laser scanner survey
Effect of temperature and humidity on the mechanical properties of fibreglass/aluminium laminates
No full textIn the last decades, a new class of laminates, made of alternating layers of polymer matrix composites and metal alloys bonded together, has emerged as candidate for application in aeronautical structures. Among these new materials, often labelled as "fibre/metal laminates" (FMLs), GLARE, containing fibreglass laminae and aluminium alloy sheets, has been most widely studied, thanks to its relatively low cost and excellent fatigue and corrosion resistance [1,2]. Nevertheless, only few experimental data are available in the literature on the sensitivity of GLARE to temperature and humidity, which is a topical question to be answered in airplane construction. In this work, an FML similar to GLARE, fabricated at Alenia Aerospace, Pomigliano d'Arco using FM94 S-2 fibreglass prepreg tape and 2024-T3 aluminium alloy, was subjected to absorption tests under hot-wet conditions for times up to 7300 hrs and then mechanically tested. The mechanical characterization, carried out at temperatures ranging between 20°C and 90°C, consisted of Iosipescu in-plane shear tests and peeling tests. Similar tests were performed on virgin specimens. Some samples were also microscopically examined to assess their failure modes
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