7,715 research outputs found
The XII century towers, a benchmark of the Rome countryside almost cancelled. The safeguard plan by low cost uav and terrestrial DSM photogrammetry surveying and 3D Web GIS applications
“Giving a bird-fly look at the Rome countryside, throughout the Middle Age central period, it would show as if the multiple city
towers has been widely spread around the territory” on a radial range of maximum thirty kilometers far from the Capitol Hill center
(Carocci and Vendittelli, 2004).
This is the consequence of the phenomenon identified with the “Incasalamento” neologism, described in depth in the following
paper, intended as the general process of expansion of the urban society interests outside the downtown limits, started from the half
of the XII and developed through all the XIII century, slowing down and ending in the following years. From the XIX century till
today the architectural finds of this reality have raised the interest of many national and international scientists, which aimed to study
and catalog them all to create a complete framework that, cause of its extension, didn’t allow yet attempting any element by element
detailed analysis. From the described situation has started our plan of intervention, we will apply integrated survey methods and
technologies of terrestrial and UAV near stereo-photogrammetry, by the use of low cost drones, more than action cameras and reflex
on extensible rods, integrated and referenced with GPS and topographic survey. In the final project we intend to produce some 3D
scaled and textured surface models of any artifact (almost two hundreds were firstly observed still standing), to singularly study the
dimensions and structure, to analyze the building materials and details and to formulate an hypothesis about any function, based even
on the position along the territory. These models, successively georeferenced, will be imported into a 2D and 3D WebGIS and
organized in layers made visible on basemaps of reference, as much as on historical maps
Ab-Initio Studies on Carburization of Fe3Al Based Alloys
AbstractFe-Al based alloys exhibit excellent properties but suffer metal dusting in carburizing atmospheres. Surface composition can be a determinant factor in the solution of this problem. We calculate in this work the C adsorption energies in the L21 Fe2AlX (X=Ti,V,Nb) structures and we study the influence of surface covering. Our results show the beneficial effect of Ti, suggesting that there could exist an activation energy to promote the incorporation of C in the subsurface layers when the surface is covered enoug
L’ambiente carsico e l’idrogeologia dei gessi di Sassalbo (MS)
Nel Canale dell’Acqua Torbida (Alta Lunigiana), si trova
il maggiore affioramento di evaporiti triassiche della Toscana.
Rispetto ai gessi dell’Alta val Secchia (RE), di cui
sono il lembo meridionale, appaiono molto meno tettonizzati.
L’area carsica, che comprende in prevalenza calcari
cavernosi, ha una superficie complessiva di circa 2,2 km2
in cui sono ben rappresentate forme carsiche superficiali,
sia macro che micro. Anche i fenomeni carsici sotterranei
sembrano essere ben sviluppati: la loro genesi è stata attribuita
a periodi di avanzata e arretramento dei ghiacciai
durante l’ultimo glaciale. Attualmente nel catasto toscano
sono registrate 5 cavità, di cui 4 rilevate.
Nell’ambito del Progetto Trias II (studio interdisciplinare
svolto dalla Società Speleologica Italiana per conto del
Parco Nazionale dell’Appennino Tosco-Emiliano) è stato
possibile studiare l’area dal punto di vista morfologico,
speleologico e idrochimico, monitorando in continuo alcune
delle principali risorgenti carsiche parallelamente ai
torrenti cui esse potevano risultare connesse.
Nel presente lavoro, dopo breve illustrazione delle morfologie
epigee ed ipogee, vengono presentati i risultati del
monitoraggio idrologico. Le analisi hanno permesso di
evidenziare come in molti casi le acque del carso di Sassalbo
siano chimicamente molto simili a quelle del sistema
ad ansa ipogea del Tanone della Gacciolina in Alta val di
Secchia. Fanno eccezione altre sorgenti, alimentate quasi
esclusivamente dalla serie marnoso arenacea e dal macigno,
che presentano comportamenti idrodinamici differenti
in funzione dei loro specifici bacini di alimentazione.Karst and hydrology of the Sassalbo Gypsa (Massa Carrara
– Italy)
The largest triassic evaporitic outcrop of Tuscany is located
inside the Acqua Torbida creek (Upper Lunigiana).
They represent the southernmost and less tectonized part
of the Upper Secchia Gypsa (RE). The karst area (some 2,2)
consists mostly of limestone (Calcari Cavernosi) with well
developed macro – and micro – forms. The underground
phenomena are mainly related to the mouventes of glacial
tongues during the last Glacial. 5 cavities are presently
known and inserted in the Tuscany Cadaster, 4 of which
mapped. In the framework of the Trias II Project (an interdisciplinary
study sponsored by the Appennino Tosco-Emiliano
National Park and performed by the Italian Speleological
Society) this area has been investigated from the
morphological, speleological, hydrochemical point of view
while some of the major springs and related rivers were
monitored. In the paper after a short description of the epigean
and hypogean forms, the achieved result during the
hydrological study are presented. This study evidenced
that in many occurrences the behavior of the Sassalbo
karst waters is very similar to that of the Tanone della Gacciolina
cave in the Upper Secchia Valley. Only a few springs
exhibit a different behavior being rather completely fed
by the marnoso-arenacea and macigno formations
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