Search results for " Topografia"
showing 10 items of 398 documents
Using optical satellite and aerial imagery for automatic coastline mapping
2020
The continuous availability and rapid accessibility to multispectral data from satellite platforms within the Copernicus Programme represents a great opportunity for users in different fields of applications as: Agriculture, observation of coastal zones, monitoring land cover change. The aim of this paper is to identify a suitable method to map coastline using Sentinel-2 optical satellite image. The method provides the use of two indexes developed in remote sensing field for water environment: NDWI (Normalized difference water index) and MNDWI (Modified Normalized difference water index). Starting from the construction of maps of these indexes and, identifying appropriate threshold values, …
Dinamiche di popolamento e processi di trasmissione culturale nel comprensorio madonita attraverso la ricostruzione della viabilità antica
2020
La ricerca sulle Madonie nasce con l’intenzione di approfondire l’evoluzione storica del popolamento sulla regione montana della Sicilia nord-occidentale. Il territorio, che solo in anni recenti è divenuto oggetto di più approfondite ricerche storico-archeologiche, si presenta estremamente ricco di risorse naturali e caratterizzato da un sostrato culturale variegato che abbraccia territori d’alta montagna, dediti ad una economia silvo-pastorale prettamente conservativa, e insediamenti costieri fortemente proiettati allo scambio e al commercio. A fine di comprendere lo sviluppo delle dinamiche d’insediamento di un’area molto estesa, si è proceduto anzitutto con la restituzione ipotetica dei …
Retroespalhamento luminoso das córneas de pacientes com diabete melito dependente e não dependente de insulina: estudo piloto
2017
ABSTRACT Purpose: To compare central corneal backscatter obtained from Scheimpflug images between patients with insulin-dependent and non-insulin-dependent diabetes mellitus (IDDM and NIDDM, respectively) and healthy controls. Methods: Seven patients with IDDM (7 eyes), eleven patients with NIDDM (11 eyes), and sixteen healthy subjects (16 eyes) were included in this pilot study. Scheimpflug imaging system (Pentacam, Oculus Inc., Germany) was used to obtain optical sections of the cornea. Seven meridians were analyzed for each eye, oriented from 70° to 110°. Optical density values for the central 3-mm and 5-mm zones of the cornea were obtained by image analysis using external software. Resu…
A stalactite record of four relative sea-level highstands during the Middle Pleistocene Transition
2017
International audience; Ice-sheet and sea-level fluctuations during the Early and Middle Pleistocene are as yet poorly understood. A stalactite from a karst cave in North West Sicily (Italy) provides the first evidence of four marine inundations that correspond to relative sea-level highstands at the time of the Middle Pleistocene Transition. The speleothem is located ∼97 m above mean sea level as result of Quaternary uplift. Its section reveals three marine hiatuses and a coral overgrowth that fixes the age of final marine ingression at 1.124 ± 0.2, thus making this speleothem the oldest stalactite with marine hiatuses ever studied to date. Scleractinian coral species witness light-limited…
Massa Fundorum. E' possibile rintracciarla sul terreno?
2018
The work, starting from the studies on the late ancient massa fundorum, examines the possibility of tracing the organization of this kind of estate on the ground. Two cases of study are dealt with, the first in the territory of Himera and the second in the territory of Palma di Montechiaro (AG), where systematic archaeological surveys have been conducted.
Exploring the use of Unmanned Aerial Vehicles (UAVs) with the simplified ‘triangle’ technique for soil water content and evaporative fraction retriev…
2020
Participation of Dr. Petropoulos has been funded by the ENViSIoN-EO Marie Skłodowska-Curie grant (grant No 752094), part of the European Union’s Horizon 2020 research and innovation programme. Part of the present collaborative work was also materialised in the framework of a short Term Scientific Mission (STSM) of the HARMONIOUS Cost Action which financially supported Dr Petropoulos’ visit between 4 to 15 February 2020 to the Department of Engineering of the University of Palermo, Italy. Η συμμετοχή του Δρ. Πετρόπουλου χρηματοδοτήθηκε από το πρόγραμμα της Ευρωπαϊκής Ένωσης για Έρευνα και Καινοτομία «Oρίζοντας 2020», δράση Marie Sklodowska - Curie , έργο ENViSIoN-EO (αριθ. 752094). Επίσης μέ…
Archaeology of Uplands on a Mediterranean Island. The Madonie Mountain Range In Sicily
2019
The book presents an archaeological research conducted within the Highlands of Sicily. Results of the archaeological survey in the Madonie mountain range, in northern Sicily, supported by a chronological and cultural grid, drawn by the excavation of Vallone Inferno, deal with complex and fascinating problems of uplands and mountainous landscape. Settlement patterns, between the Late Pleistocene and the Medieval era, are investigated through the support of spatial analyses. A diversified use of the mountain is currently attested by this research, according to the different prehistoric and historical times. This work is innovative for the Mediterranean area, where there are no similar example…
Experimental analysis of cross-sectional flow motion in a large amplitude meandering bend
2010
Flow in meandering bends is characterized by the formation of a large cross-sectional central-region circulation cell. The width-to-depth ratio is one of the most important parameters affecting the entity of the cross-circulation motion. In steep outside bends, beside the central-region cell, a counter-rotating circulation cell often forms in the upper part of the outer-bank. In spite of its practical importance, the evolving mechanisms of both the circulation cells and their role on boundary shear stress distribution in bends are not yet fully understood. The aim of the present paper is to gain some insight into how cross-sectional flow motion evolves along meandering bends. Experiments ha…
Modellazione e analisi tridimensionale dell'Agorà e della Basilica del sito archeologico di Elaiussa
2009
This paper describes the procedures used to generate 3D models of the Agora and the Byzantine Basilica of the Elaiussa archaeological site. The virtual reconstructions were carried out from the excavation data of the artefacts, made available by colleagues from the Department of Historical, Archaeological and Anthropological Science of Antiquities of the Rome “La Sapienza” University. 3D modelling software was particularly suitable to the reconstruction of these artefacts of which only few traces remain. In order to obtain a more accurate representation, 3D models of architectural elements of special value were also produced, as the capitals of the Agora re-employed in the Basilica and the …
Baucina-Monte Falcone 2014, indagini nella necropoli.
2016
The aim of this report is to present the results of archaeological samples, executed in order to contrast illegal researches on a necropolis at Baucina, in the northwestern part of Sicily, where Punic, Greek and indigenous traditions coexisted, in a relationship which is the focus of our ongoing investigation. We collected an archeological dataset, whose interpretation is detecting an articulated situation where the interaction between three different ethnic groups gave as result the variety of rituals. The future excavations of the site could increase the perception of this interaction, for a period in which Greeks and Punics designed their spheres of influence of the territories within th…