Angela Ferrante, Ersilia Giordano, Francesco Clementi, Gabriele Milani, Antonio Formisano
The dynamic behavior and the seismic vulnerability of different masonry Apennine Churches, dramatically damaged by the last shocks sequence of 2016 that occurred in Central Italy, have been studied in this paper by means of advanced 3D numerical analyses with the Discrete Element Method (DEM). Thus, a discontinuous approach has been used to assess the dynamic properties and the vulnerability of the masonry structure, through large deformations regulated by the Signorini s law, concerning the impenetrability between the rigid bodies, and by the Coulomb s law, regarding the dry-friction model....
TC4 MetroArchaeo 2019
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· 2019
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Antonia Spanò
The paper focuses the feasibility of rapid mapping methods in archaeological site, enlightening the flexibility in different kind of ancient buildings and sites surveying with the aim to 3D document and to model objects of interest with rich geometric and radiometric contents and high accuracies. After discussing constraints to be considered for the correct use of rapid mapping methods, a case study will be described in which an UAV photogrammetry survey, integrated with a terrestrial survey using a mobile laser scanner based on SLAM technology (Simultaneous Localization and Mapping) was...
TC4 MetroArchaeo 2019
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· 2019
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Mattia Previtali, Lucia Díaz-Vilarino, Marco Scaioni, Ernesto Frías Nores
Laser Scanning is nowadays more and more widespread for documentation of archaeological sites. To guarantee a proper survey, especially in the case of large archaeological site, several parameters need to be taken into consideration to guarantee the effectiveness of the documentation. In particular, these account for data accuracy, density and completeness. Generally, scan planning is empirically based on the personal experience of the operator. This paper presents a more controllable and reliable way for scan planning optimization. The presented methodology is based on a two-step approach....
TC4 MetroArchaeo 2019
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· 2019
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Manuel J.H. Peters, Tesse D. Stek
Historical aerial imagery can be used to investigate geomorphological change over time, which can inform research about the preservation and visibility of the archaeological record, as well as heritage management. This paper presents a composite Image-Based Modelling workflow to generate 3D models, historical orthophotos, and historical digital elevation models from images from the 1970s. The main challenge was the lack of high-resolution recent digital elevation models and ground control points. Therefore, spatial data from various sources had to be combined. To assess the accuracy of the...
TC4 MetroArchaeo 2019
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· 2019
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E. Angelats, M. E. Parés, C. Mas-Florit, M.A Cau-Ontiveros
One of the main tasks of archaeologists is to document (map) their sites at a level where stones may be clearly distinguished and to provide centimetrelevel reliable measurements of man-built structures. One of the goals of the project ARCHREMOTELANDS is to develop a methodology to generate those maps semi-automatically combining RPAS imagery, photogrammetry and machine learning techniques. In this context, this paper presents a conceptual framework to determine the minimum number of pixels, and so the required Ground Sampling distance and altitude needed to fly a RPAS allowing very detailed...
TC4 MetroArchaeo 2019
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· 2019
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Efstathios Adamopoulos, Fulvio Rinaudo
Continuous developments on sensors, data acquisition techniques, algorithms and computational systems have enabled automation, higher processing velocities and increased metric accuracy regarding the modeling of tangible heritage. For applications on heritage artefacts or architectural details, scanning and photogrammetric systems based on structure-frommotion (SfM) approach have prevailed, due to lower costs, fast acquisition and processing, re-producibility of workflows and ability to capture high-resolution texture. This study presents an updated comparison of contemporary digitization...
TC4 MetroArchaeo 2019
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· 2019
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Giovanni Chimienti, Francesco Mastrototaro
Future perspectives in underwater vehicles potential uses and needed features are here presented and discussed through different study cases embracing research, monitoring and exploration, from shallow-water to deep-sea habitats and communities. Essential features asked to the next generation of underwater vehicles include the possibilities to explore deeper depths, observe in detail targeted specimens, use further spectra besides the visible, sample soft-body benthic organisms, move within demanding situations (e.g. obstacles on the seabed), as well as the ability to stably stop on the...
Simone Zazzini, Michela De Dominicis, Agnese Pini, Giovanni Leuzzi, Paolo Monti, Rory O Hara Murray, Xiaorong Li
The high tidal stream resource in the Pentland Firth (Scotland, UK) has encouraged the development of commercial scale tidal farms. This work is a modelling study primarily focused on how the layout of arrays determines the extractable power and may affect physical processes in the region. Furthermore, the study provides information about submarine turbine maintenance. Tidal dynamics in the Pentland Firth and Orkney Waters (PFOW) have been reproduced by a three-dimensional FVCOM model implementation. The tidal stream turbines were represented in the model as sub grid scale objects by using a...
Daniele S. Terracciano, Vincenzo Manzari, Mirko Stifani, Benedetto Allotta, Andrea Caiti, Giuseppe Casalino
The technological potential offered by Maritime Unmanned Systems (MUS) is recognized by many countries as an effective tool for both military and civilian applications. The increasing use of MUS brought substantial and new challenges to the Test and Evaluation process that becomes significantly more complicated than traditional systems. Unmanned systems have continuously increasing complexity and capabilities and can be at different maturity levels. These technologies necessitate for specific Test and Evaluation tools throughout the whole program life cycle. For the above reasons, the Naval...
Mouldi Ben Meftah, Elvira Armenio, Diana De Padova, Francesca De Serio, Michele Mossa, Davide Tognin
In this study we focus on how understanding, through experimentation using advanced techniques, the dynamic of wave interaction with emergent vegetation. In order to achieve this objective, an experimental study of wave mention through an infinite array of emergent cylinders distributed along a channel bottom was carried out in the Coastal Laboratory at the Polytechnic University of Bari (Italy). A series of sophisticated equipment was used to produce and measure the details of this phenomenon, including essentially an electro-valve, equipped with an electromagnetic flow meter and a control...