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Serpil Akozcan, Simona Mancini, Natasa Todorovic, Selin Ozden, Michele Guida
Assessment of the natural radioactivity content in typical building materials employed in the Italian cultural heritage

Natural radionuclides from the uranium (238U) and thorium (232Th) families, as well as the radioactive isotope potassium, are present in varying concentrations in building materials and products obtained from rock and soil. In Italy, in historical monuments, natural building materials have been largely employed for decorative and structural purposes.
In this study we measured the natural radioactivity content in six different materials (Grey tuff, basalt lava stone, lava stone, sand stone, magmatic rock and travertine). The activity concentrations were determined by high purity germanium (HPGe) detector based gamma spectrometry.
The radium equivalent activity (Raeq), indoor absorbed gamma dose rate (Din), the annual effective dose (De), and the internal and external hazard indexes were evaluated to assess the radiation hazard for people living and working in buildings where these materials are used.

Francesco Caridi, Giuseppe Paladini, Pasquale Faenza, Vincenza Crupi, Domenico Majolino, Valentina Venuti
X-ray fluorescence analysis of bronze sculptures by Giuseppe Renda

In this study the elemental composition analysis of three bronze sculptures by Giuseppe Renda (one of the most famous interpreters of the Neapolitan Verism in the 19th and 20th centuries), respectively named La Fortuna, Scugnizzo and Non mi toccare, was performed, for the first time, by means of portable X-ray fluorescence (XRF) spectroscopy.
The analysis of the investigated artefacts, closely related to the sample preparation and preservation, was carried out with the aim of improving the knowledge of the Southern Italy bronze art of the second half of the 20th century and in order to suggest to restorers the best interventions to minimize the conservation problems that could affect the durability of the precious artefacts.
Noteworthy, the achieved results represent useful and essential tools to obtain information on the execution technique, in a completely non-invasive way, and to address management issues of the investigated artworks.

Francesco Caridi, Simona Mancini, Giuseppe Paladini, Pasquale Faenza, Vincenza Crupi, Valentina Venuti, Domenico Majolino
XRF investigation of the Monument to the Fallen of the Great War by Francesco Jerace in San Ferdinando (Reggio Calabria, Italy)

The Monument to the Fallen of the Great War in San Ferdinando (Reggio Calabria, Italy) consists of a copper-based alloy sculpture, made in the 1920s by Francesco Jerace (1853-1937), dedicated in memory of the sub-lieutenant Vito Nunziante and the fallen soldiers from the Great War. It has an important heritage value for the city of San Ferdinando, of which it is considered an identity symbol, and for Southern Italy as well. Due to its proximity and exposure to the marine environment, the monument is a key – example for the characterization of the elemental and molecular composition of the superficial layers of the alloy and the related corrosion products, gathering important in-formation on both the materials and the state of conservation of the sculpture. With this aim in mind, this research highlights the results of a study carried out in situ at elemental scale, by portable X-ray fluorescence (XRF) spectroscopy, on the occasion of the recent restoration of the monument promoted by the municipality of San Ferdinando.

Sowmeya Sathiyamani, Mathieu Tillier, Naïm Vanthieghem, Claudia Colini
Leafing through time: Ink Analysis of the longest Qur’ān on Papyrus

The fragments preserved at the Staats- und Universitätsbibliothek Hamburg, under the shelfmark P. Hamb. Arab. 68 are, to date, the longest and oldest excerpt of extant Qurʾān on papyrus. The fragments contain the Sura 2 in its entirety, written over seven bifolia originally sewed in a single quire. The writing incorporates the use of diacritical dots as well as markers indicating the ends of verses and text. Three of the seven folios were analysed to determine the inks used in writing the texts, the dots and the markers. The results indicate that the text was written with a carbon-based ink characterised by the presence of trace amounts of copper, possibly due to impurities in the water or the use of a copper or bronze inkwell. The diacritical dots completing the text were penned using the same ink while a different carbon ink, without copper, was used for the decorative elements of the text.

Olivier Bonnerot, Leah Mascia
Scribes and Writing Practices in Egypt's Ala Veterana Gallica: A Preliminary Study of Inks from a Military Roll

This article reports on the preliminary study of the inks from a military roll belonging to the archive of the veteran (Lucius) Iulius Serenus, dated to 179 CE. The papyrus contains receipts for payments for hay for soldiers of the ala veterana Gallica, and features different writing hands and inks of various appearances. The analysis using a combination of infrared reflectography and X-ray fluorescence spectroscopy, revealed that the inks are carbon-based, but also contain varying amounts of copper and calcium depending on the writing hand and the section of the roll. These results shed light on the development and diversity of ink production and use in Egypt from the late second century CE in the context of the Roman army.

Giorgio Di Gangi, Chiara Maria Lebole, Sergio Enrico Favero Longo, Laura Guglielmone, Gabriele Sartorio, Samuele Voyron
Alpine archaeology and everyday life at high altitudes: from the excavation to the laboratory (Orgéres-La Thuile, AO, Italy)

The Orgères settlement (La Thuile-AO- 1665m.) is located at the entrance of the Vallon des Chavannes, an alternative road to the Piccolo San Bernardo pass. The archaeological excavations have revealed a multi-layered context (1st-18th century AD) with buildings functional to the control of territorial management connected to the valley economy based on breeding, the production of wool, milk and derivatives, wood, hay, etc. On the basis of archaeozoological and isotopic analyses of animal teeth we know that Orgères was a permanent and non-seasonal settlement. In this work, DNA-based metabarcoding analyses were conducted on soil microbial communities and plant remains at different archaeological layers. The laboratory data made it possible to identify some important indicators in order to draw an initial picture of living conditions at high altitudes.

Marc Valls Mompo, Gianni Gallello, Irene Sáez Giménez, Agustín Pastor Garcia, María Oreto Garcia Puchol
A natural resins reference collection to identify organic compounds in archaeological samples

Natural resins have been employed since the prehistory as an adhesive in the manufacturing processes and operative chains of several tool. For this study several type of natural resins in different preservation condition were collected or acquired to be analysed by GC-MS to create a specific reference data base to identify organic compounds in archaeological materials. The analytical approach employed to build the data base is defined and the quality assurance and quality control results are described. The results obtained show the reliability and strength of the developed method.

Elena De Panfilis
Revealing and unveiling the polychromy of the Camponeschi Monument in L'Aquila

The case-study of the Camponeschi Monument (1432), located in San Giuseppe Artigiano in L'Aquila, raises numerous questions, both in the field of art history and applied diagnostics. The investigation project started in order to document and characterise the polychrome and polymateric aspect of the work, sculpted in local limestone: this polychromy was only understood during the last restoration (2008-2009). It was supposed to cover the sculpture with unusual vitality, as a sign of power of Camponeschi s family, lords of L Aquila. After the first phase of investigations (UV, IR, IRFC), curated by Ottaviano Caruso, we will proceed with XRF, Raman and LIF analyses, maybe even developing new technologies ad hoc, trusting also to elaborate a 3D model with different layers, useful for knowledge, conservation and monitoring of the artefact and its interactions with the environment. Moreover, this case-study places art history and diagnostics in a reciprocal dialogue.

Michela Perino, Michele Ginolfi, Anna Candida Felici, Michela Rosellini
A deep learning experiment for semantic segmentation of overlapping characters in palimpsests

Palimpsests refer to historical manuscripts where erased writings have been partially covered by the superimposition of second writing. By employing imaging techniques, e.g., multispectral imaging, it becomes possible to identify features that are imperceptible to the naked eye, including faded and erased inks. When dealing with overlapping inks, Artificial Intelligence techniques can be utilized to disentangle complex nodes of overlapping letters. In this work, we propose deep learning-based semantic segmentation as a method for identifying and segmenting individual letters in overlapping characters. The experiment was conceived as a proof of concept, focusing on the palimpsests of the Ars Grammatica by Prisciano as a case study. Furthermore, caveats and prospects of our approach combined with multispectral imaging are also discussed.

Maurizio Perticarini, Andrea Giordano
Ponte San Lorenzo, a case study for the comparison of image-based survey tools. NeRF as an alternative to photogrammetry

The aim of the research is to experiment with the new possibilities offered by artificial intelligence applied to surveying. Ponte San Lorenzo, a perfectly preserved archaeological artefact under Via Riviera dei Ponti Romani in Padua, one of the case studies of the 2018 project of the University of Padua entitled: PD-Invisible: PaDova INnovative VISions - visualizations and Imaginings Behind the city Learning, was the object of an accurate integrated image and range-based survey and made it possible to compare the different 3D acquisition methodologies of the cultural heritage. The Bridge is now digitally rendered through the new system developed by Nvidia called Instant Nerf and the new web-based software Luma AI which exploit machine learning and Volume Ray Merching for the creation of virtual twins. The same database of photographs taken for photogrammetry was used as a training database for the algorithm. The research aims to evaluate the results of the new survey system and to compare them with the results of the methods used in the past.

Page 7 of 938 Results 61 - 70 of 9371