Scientific Open-access Literature Archive and Repository
Not a member yet
16397 research outputs found
Sort by
Campagna Marine Strategy – ARPAS 2016: Caratterizzazione habitat coralligeno e habitat fondi a maërl/rodoliti
Get PDFObiettivo della presenta campagna è di identificare, mappare e caratterizzare gli habitat a coralligeno e Maerl della Sardegna occidentale e settentrionale nell'ambito del programma di monitoraggio dei fondali previsto dalla Marine Stategy Framework Directive (MSFD) in collaborazione con ARPA Sardegna.
La richiesta della campagna Marine Strategy ARPAS 2016 fa parte del piano di monitoraggio assegnato alle Regioni in accordo con il Ministero dell'Ambiente e, nello specifico, affidato da ARPA Sardegna a CNR di Oristano.
Gli obbiettivi specifici della campagna sono:
1.acquisizione di dati ROV relativi a cinque aree di indagine individuate nell'ambito dell'accordo ARPAS Sardegna – CNR-OR (Buggerru, Alghero, Capo Testa, Costa Paradiso, Catalano);
2.integrazione dei dati multibeam esistenti con nuovi dati per la mappatura degli habitat dell'Area Marina Protetta Sinis-Mal di Ventre
Applicazione del rilevamento geomatico alla Domus della regina d'Inghilterra a Pompei (VII, 14, 5): risultati preliminari
Get PDFThis work arises from the collaboration between the Laboratory of Archaeological Research Methodologies and the Laboratory of Geomatics of the University of Genoa, based on a multidisciplinary approach, combining archaeological and engineering skills. Since 2016, the team of archaeologists from the University of Genoa has been working inside the Pompeii Archaeological Park in the shops of insula 14 of Regio VII, an important area within the urban context as it overlooks Via dell'Abbondanza, the most important road, and it is located in a central position, in proximity to the main public areas, such as the Forum. From the beginning of the project to the present day, the archaeology team has analysed the tabernae from a stratigraphic point of view. So, simultaneously with the excavation activity, a stratigraphic analysis of the walls and coatings was carried out, involving both the commercial establishments being excavated and the three large houses of the insula, mainly focusing on the most western one, named Casa della Regina d'Inghilterra. In September 2020, a survey campaign was carried out by geomatics engineers aiming to applying innovative survey methodologies to the architectural complex of the entire insula and, specifically, to the Casa della Regina d'Inghilterra. In particular, the survey data were collected by total station, GNSS, laser scanner, combined with terrestrial and UAV photogrammetry. This paper presents the preliminary results obtained from the geomatic survey campaign, leading to the creation of an accurate photogrammetric model which can be used as a basis for a reconstructive model, whose hypotheses will be confirmed or denied by a future structural analysis
Rilievo per la modellazione e la gestione informativa HBIM. Approccio multicomponente per l'analisi strutturale e il restauro di edifici storici
Get PDFThe architectural survey for the restoration of a monument is closely linked to the conservation objectives, the research methodology, and the application of multiple direct an indirect investigation techniques for the construction of adequate geometric and informative models. In particular, the paper aims to understand and evaluate a building from its structural characteristics, developing a methodology that, from the geomatic survey, deconstructs the building itself into elements and articulates them in a HBIM platform, which integrates a set of five semantic models representing the architectural components and construction abaci. The approach applies this survey method and modelling workflow to the study of some post-Byzantine monasteries in Albania with a focus on the structural conditions of the church of S. Maria in Goranxi that presents problems of instability due to phases of expansion and over construction
From surfaces to volume: towards a volumetric reconstruction of the archaeological deposit
Get PDF3D recording methodologies have been successfully integrated into the archaeological fieldwork practice, resulting in a widely accepted series of advantages for the documentation of the excavation. However, post-processing analysis is often neglected and recording protocols do not consider possible developments for exploiting the potential of 3D data. At the excavation of Vetricella, in Italy, the ERC nEU-Med project developed a digital documentation protocol aimed at reconstructing the volumetric physical space occupied by each stratigraphic unit, generating more than a thousand contexts over the course of four archaeological seasons. In this contribution we are going to present how the volumetric approach has influenced the whole methodology of documentation since the recording stage, introducing a standardized workflow aimed at reconstructing solid geometries from 3D surfaces. In this protocol a great attention is paid to the strategies, timings and needs of the fieldwork practice, without overlooking important archaeological aspects such as data accuracy and the chance to generate data for more quick on-field interpretation. The final outcome is a new visualization and analysis of the space with the use of volumetric models, which results in greater accuracy in displaying physical and stratigraphic relationships, as well as generating volumetric quantitative data. In the end, some examples drawn from Vetricella will be employed to show how solid 3D geometries and volumetric quantities can be used in support of the archaeological interpretation of the site
Sculture dal Foro di Traiano: nuovi approcci metodologici
Get PDFThe Forum built in Rome by Trajan is a match of his political and military virtues: the defeated populations materialize with statues and high-reliefs in precious marble and are therefore an integral part of the marble triumph of the emperor and the Roman army. The statues of the Dacians are distributed on the most visible architectural parts of the complex, and they have different size, as well as different back surface treatment, depending on their location. In order to reconstruct the architectural composition together with the sculptural apparatus, a complete metrological analysis of the sculptures has been undertaken, alongside the examination of the material features of Daci statues (clothing, surface treatment) and of data yielded by archives and excavations that took place in the past centuries and recently in the 21st century. The work has been based on a method measuring bi-dimensional photographic shaped-set of all the Daci dispersed in several art collections, starting from the idea of working with a low-cost method without specific expensive software. The workflow combines bi-dimensional images, scaled to 1:1 reference, imported in AutoCAD in order to produce a single .dwg file, with good resolution but easy-to-manage during the data processing. Some interesting, albeit preliminary, goals have been achieved. In the first place, a measured catalogue of all the Dacian statues dispersed in the world has been quickly built. It was therefore possible to start the reconstruction, at least virtual, of the sculptural context of Trajan's forum. Regarding the size and archaeological aspect of the sculptures, three dimensional series of Dacians have been grouped, which contributed, on the one hand, to confirm the results of previous studies, and on the other to advance the knowledge with new data
Searching for neutrinoless double beta decay with LEGEND-200 experiment
No full textExperiments searching for neutrinoless double beta (0νββ) decay, have the capability to unveil the neutrinos mysteries: defining their absolute scale mass and establishing their nature (Dirac or Majorana particles). The LEGEND collaboration works to develop the largest 76Ge 0νββ decay experiment in history. The collaboration was born from the synergy of two collaborations, Gerda and Majorana, and additional institutes. The first phase of the experiment, called LEGEND-200, is under construction at LNGS of INFN: the experiment aims to reach a sensitivity on the half-life of 0νββ decay up to 1027 yr by operating about 200 kg of HPGe detectors within the upgraded Gerda infrastructure. The experimental setup and the LAr veto system used to actively suppress background events, will be summarized
Characterization of SiPM for the photodetection system of DUNE far detector
No full textInside a Liquid Argon Time Projection Chamber the process which leads to the collection of scintillation light over a large area into a compact space is a challenging one. In this scenario, a Photon Detection System able to minimize its impact on the active volume of the Liquid Argon plays a crucial role. In the first module of the DUNE Far Detector, traditional photomultiplier tubes will not be used due to space reasons. Instead of them, sensors with reduced size are forseen: the Silicon Photomultipliers (SiPMs). These SiPMs will be placed in a cryogenic environment in extreme working condition. For this reason, a test campaign aimed
to characterized and select them has been conducted. In this paper the preliminary results obtained during the first tests are reported
The Recoil Directionality (ReD) experiment
No full textDirectional sensitivity to nuclear recoils would provide a smoking gun for a possible discovery of dark matter in the form of WIMPs (Weakly Interacting Massive Particles). A hint of directional dependence of the response of a
dual-phase argon Time Projection Chamber was found in the SCENE experiment. Given the potential importance of such a capability in the framework of dark matter searches, a new dedicated experiment, ReD (Recoil Directionality), was designed by the Global Argon Dark Matter Collaboration, in order to scrutinize this hint. Before the irradiation with a neutron beam, the ReD TPC underwent a long campaign of characterization and optimization: some selected results are presented in this contributio
Serotonin Surge: Intravenous Escitalopram as a Rare Cause of Drug-Induced Aplastic Anaemia
Get PDFEscitalopram is a commonly prescribed medication that has infrequently been implicated in drug-induced thrombocytopenia (DITP) but has never been associated with aplastic anaemia in the literature. We present an extremely rare case of hypoproliferative pancytopenia due to self-administered intravenous (IV) injection of escitalopram. The crux of this case is the unusual trilineage cytopenia. Our patient was managed with steroids and supportive care with subsequent clinical and blood count recovery. This case sheds light on this uncommon but important association
Two Cases of BRASH Syndrome: A Diagnostic Challenge
Get PDFBradycardia, renal failure, atrioventricular (AV) nodal blockade, shock, and hyperkalemia (BRASH) syndrome is a relatively new clinical entity. It is often underrecognized, underdiagnosed, and confused with other causes of bradycardia. Treatment of BRASH syndrome differs from the standard bradycardia algorithm in advanced cardiac life support (ACLS), and the cornerstone management remains treating the hyperkalemia, improving renal function by treating the underlying cause, withholding AV nodal blocking agents, and considering dialysis in refractory cases, as any single factor could precipitate the vicious cycle. Here we describe two cases of BRASH syndrome with different clinical presentations that were treated with conservative management: one case in a 77-year-old Japanese woman and the other in an 86-year-old man