IMEKO Event Proceedings Search

Page 6 of 936 Results 51 - 60 of 9356

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.

Francesco Di Paola, Sara Morena, Sara Antinozzi, Giulio Raimondi
The survey of the precious one of Constance. Tools and techniques for three-dimensional restitution of complex surfaces at sub-millimetre resolution

Numerous factors must be managed to ensure high quality and accuracy of sub-millimetre resolution models. In this regard, this study reports two examples of surveying objects of accentuated complexity: the precious ones of Constance. These are two emblematic cases selected to determine whether the recording systems chosen, a structured light scanner and a low-cost camera integrated into a USB microscope, could support the requirements of accurate and reliable three-dimensional reconstruction.
The work conducted allowed us to experiment different technologies, highlighting their peculiarities but also the limits that each of them has in particularly complex conditions. Like often happens in the archaeological environment, the objects to be surveyed present unique as well as varied characteristics, which is why a single type of instrument is often not always able to completely render the final three-dimensional model. This underlines the complexity of the survey process and the difficulty in finding a single pipeline.

Asa Berggren, Marco Callieri, Nicolò Dell'Unto, Paola Derudas, Domenica Dininno, Fredrik Ekengren, Giuseppe Naponiello
The Dynamic Collections project: providing structured online access to digital replicas

This contribution will present the latest results of the Dynamic Collections project, highlighting the evolution of the approach, methodologies and tools. The core idea behind the project was to explore the possibilities of working online, for teaching and study purposes, with high-resolution digital replicas of archaeological artefacts, going beyond the single-object approach.
To this aim, the project built an archive of high-resolution digital models, and designed and implemented an online platform that makes it possible to build, annotate and share a custom assemblage of the objects in the archive (a Dynamic Collection, that is). These annotated collections can be the pivot element in the definition of collaborative workflows and shared research/teaching environments.

Stefano De Santis, Giovanni Moretti, Michele Arturo Caponero, Sara Fares, Cristina Mazzotta, Diego Dell'Erba
Investigation on a prototype integrated system for strengthening and monitoring architectural heritage

Composite Reinforced Mortar (CRM) is an advantageous system for the upgrade of existing structures and is particularly suitable for architectural heritage. Despite the acknowledged importance of continuous structural health monitoring (SHM), effective technologies have not been developed yet for CRM-strengthened buildings. This paper describes a preliminary investigation on a novel system, which integrates CRM with Fibre Bragg Grating (FBG) sensors. Direct tensile tests were carried out as the first step of a wider prototype development programme. Strains measured by FBG sensors were validated against those provided by Digital Image Correlation, showing the reliability of the proposed CRM-FBG integrated system for combined strengthening and SHM purposes.

Cecilia Giorgi, Giovanni Caratelli
A metrological approach to the study of ancient architecture. The cases of the Grotta dell’Arsenale and the villas of Gradola and Damecuta in Capri

The project Masgaba. An Archaeological Map for the Island of Capri aims to create an archaeological map of the island of Capri, focusing on the Roman era, by compiling existing data and documentation into a comprehensive digital archive. The main objective is to gain a deeper understanding of the archaeological assets of the island, including their original functions and dimensions, in order to facilitate their preservation, enhancement, and contribute to territorial planning. The project involves mapping and studying the known sites, conducting field surveys, and utilizing advanced techniques like photogrammetry and laser scanning. This type of survey allows for the application of a metrological approach with a certain level of confidence, which has yielded unexpected results in the Grotta dell Arsenale and the Gradola and Damecuta villas, especially in terms of planimetry and constructional aspects that were impossible to comprehend from previous documentation.

Maria Antonietta Zicarelli, Michela Ricca, Silvestro Antonio Ruffolo, Raffaella Greca, Mauro Francesco La Russa
Preventive conservation of the pictorial evidence in the church of Sotterra (Paola, Italy): a microclimatic investigation in a hypogeum environment

The conservation of subterranean sites is an issue that poses hard questions, several of which are nowadays still unanswered. In the field of preventive conservation, microclimatic investigation is fundamental as it makes possible to examine the interaction between environmental conditions and degradation phenomena which occur on the artifacts. In the present study, a microclimatic campaign for the duration of nine months was conducted inside the church of Sotterra at Paola, in the province of Cosenza (Calabria, Italy). The church, today located six metres under the ground level, represents a unicum since, despite its current location, it was originally built at ground level. The presbytery area preserves important mural paintings which date back from 11th to the 15th century which suffer severe damage due to the extreme environmental conditions. The results already obtained from the diagnostic campaign of a previous work have been combined with the thermo-hygrometric values in order to assess the conservation risks of the pictorial evidence.

Page 6 of 936 Results 51 - 60 of 9356