1,721,013 research outputs found
E. Stone, An Archive for the Sardinia Monumental Witnesses
No full textThe "E. Stone" project is based on the survey, documentation investigation and physical, geochemical and petrographic characterisation of the great zoomorphic and phytomorphic stones of Sardinia. The name chosen to indicate this project means the full value of these stones, standing before the beginning of human history. The main task of this project is the investigation and the documentation, both based on an accurate digital survey, taken using laser scanner units supported by topographical survey and integrated by GPS tracing and photographic and photogrammetric survey, with a meaningful research aimed to specific investigations on the rock characteristics. The further development of the collected data will be aimed to the definition of a digital "state of the knowledge" about the stone. This research will produce the following main benefits: the creation of a pilot monitoring station documenting the decay processes of stones for make the future projections on based on current alteration trends; the creation of a clear and stable archive of these monuments oriented to be a preservation tool; the opportunity to allow the reply, at any distance, a copy in any material of the original item
The health risk of the agricultural products grown in potentially contaminated sites: proposal of an environmental – health risk analysis
No full textThe rural territory is often interested by polluting phenomena determined by agricultural
activities with high pesticides use and/or by industrial plants or illegal dumps. The risk for the
human health coming from the polluters presence in the environmental can be quantitatively
evaluated by the environmental health risk analysis defined by the Legislative Decree n.
152/2006. The technical-normative procedure of risk analysis not consider the specificity of
the soils designed to agricultural use and the possible agricultural products contaminations.
This work aims at filling this technical-normative lack by identifying and applying a suitable
methodology for the evaluation of the health risk caused by the ingestion of agricultural
products grown in contaminated soils. This work shows the results of the risk analysis
applied to a contaminated area in southern Italy by an innovative methodology based on
scientifically consolidated and widely accepted relations. In addition, some concentration
limits of organic polluters in agricultural soils are proposed
La condizionalità e la gestione fitosanitaria dell'azienda agricola: le Buone Condizioni Agronomiche ed Ambientali, la Buona Pratica Agricola, le procedure di controllo e sanzione
No full textFrom the small elements to the urban scale: an investigation where petrophysical study of materials and architectural shape analysis try to read a masterplan in the Hadrian’s Villa, Tivoli (Rome, Italy)
No full textInside the Hadrian’s Villa in Tivoli, it is possible to read multiple networks aimed to create systems for moving people and supplies, to create spectacular spaces, to give welfare and security to the court and to the people living in this urban scale monument. The reading of these networks sometimes is not easy, but the main idea in this project is to start from the small evidences in the single buildings, find rules and solutions to combine them into a global digital survey based on a 3D digital model and then start using this model for the formulation of some hypothesis. The evidences will come from the analysis of the materials (stones, mortars, concretes, bricks) and from the architectonic shapes study. Combining these two parallel paths into the rich digital survey of the area gathered by the “Dipartimento di Architettura” since 2004 it becomes possible to create a multi-level environment aimed to be shared by scholars from different branches to start their analysis. Through a petrophysical study of materials, the macroscopic analyses data of structure wall textures, all linked to the 3D digital documentation based on the use of laser scanner technologies, it’s possible to reconstruct the construction stages of the ancient baths. The petrographic, mineralogical and chemical characterization of the wall and floor mortars and concretes and their physical properties (total and open porosity, real and apparent density, mechanical strength, aggregate granulometry, binder/aggregate ratio, etc.) allowed to classify the function and the compositional variations of the same within the structure of the thermae. In parallel to this the study of the architectural shapes, starting from the accurate digital survey, allowed to identify geometric constructions, with variable and constants in the architectural choices, tracing some interesting paths in the deep knowledge of this monument
Analisi spaziale della distribuzione della ceramica nel complesso dell’area A
No full textLa quanti,cazione dei pezzi ceramici scavati è risultata utile per la successiva fase di analisi e confronto delle varie classi e forme recuperate all’interno dei singoli vani. Questo approccio quantitativo è nato dalla volontà di dislocare e descrivere, all’interno dell’edi,cio, la distribuzione dei pezzi ceramici appartenenti alle varie classi e forme e delle quantità complessive pesate di ciascuna classe. A questo scopo, si è deciso di procedere alla gestione dei dati quantitativi di scavo attraverso un’applicazione GIS (Geographic Information System) che permettesse di eseguire correlazioni spaziali tra la componente geogra,ca, costituita dalla pianta di scavo, e una consistente componente alfanumerica, rappresentata dalla totalità dei dati quantitativi relativi ai pezzi ceramici scavati. L’impiego della tecnologia GIS ha permesso di elaborare una serie di mappe tematiche di distribuzione con la funzione di mostrare, in maniera chiara, la distribuzione delle quantità dei pezzi scavati, classi,cati in base all’appartenenza ad una determinata classe ceramica o forma ceramica e in base allo loro quantità pesata
Petro-physical characterization and 3D digital modeling for geometric reconstruction of the Neolithic “domus de janas” of Sedini field (North-Sardinia, Italy)
No full textThe subject of the investigation is a volcanic rock in which a
group of Neolithic tombs named "domus de janas" have been
excavated. this operation is quite common in Sardinia, even if in
this specific case it assumes some even more interesting
characteristics. The research started gathering the 3D digital
models with a high level of details and developing this virtual
model with its great accuracy within its geographical -virtualenvironment.
The further steps were aimed at providing the
information about its petrophysical characteristics, alteration
processes and the evidences of the missing parts fallen during an
ancient collapse. The main task is showing how to put together
the 3D survey of this monument with all the data about its decay.
The further development of this research will be aimed to: the
definition of a searchable model with all these information linked
in it, to produce a complete reconstruction of the original
structure of the tombs, the definition of the potential threats on
the future for this monument conservation
The health risk of the agricultural production in potentially contaminated sites: an environmental-health risk analysis
Full text linkRural areas are often interested by pollution phenomena generated by agricultural activities with a high use of pesticides and/or by anthropic activities, such as industrial plants or illegal waste disposal sites, which may cause even long-range contamination. The risk for human health from the pollutants present in the environment can be quantitatively evaluated by the environmental health risk analysis set out in the Italian Legislative Decree no. 152/2006 (Italian Regulation, 2006). This analysis is the best technical-normative tool to estimate the health risks linked to the pollutants present in the environment but it does not consider the specificity of agricultural soils or the contamination of agricultural products. This study aims to provide this missing technical-normative data by identifying and applying a suitable methodology to evaluate the health risk caused by the ingestion of agricultural products grown in contaminated soils. The risk analysis was applied to two contaminated areas in southern Italy using an innovative methodology based on widely accepted parameters for the determination of polycyclic aromatic hydrocarbons (PAHs) soil-plant bio-transfer factor in the case of horticultural crops. In addition, some concentration limits of PAHs in agricultural soils are proposed that may be of help to the competent authorities (health agencies, local authorities) in delineating the areas requiring strict health surveillance of the food products cultivated
The church of St. Saturnino in Cagliari, Sardinia, reading the levels of history through the use of digital survey and the petrophysical study of materials
Full text linkThe most ancient church in Cagliari is dedicated to Saint Saturno (commonly named Saint Saturnino), the first indications about this church came from the sixth century, but the building arrived to our time is only a part of the original one and it rises over the ruins of previous structures, inside a a walled area with the presence of a Palaeo-Christian necropolis. The original Greek cross plan with a transept and a semi-spherical dome; has seen meaningful transformations in time, with the partial destruction of large parts of the building. All the four arms had a nave and two aisles, but the current church consists only of the dome-covered area and of the eastern arm, with a nave and two aisles. The whole church shows very interesting parts coming from previous architectures of the Roman age, a rich catalog of rich materials and details. In summer 2013, a collaboration between the Departments of Chemical and Geological Sciences from Cagliari and the one of Architecture from Florence brought to the realization of a detailed study about this ancient church. The whole building and its surrounding area were surveyed with the following methods: photography, 3D Laser Scanner for the whole interior and exterior parts, 3D photogrammetry of a selected set of stone surface samples, direct sampling of representative rocks for geochemical and petrophysical analysis. All data were then treated and analyzed to deepen the knowledge about the most meaningful aspects of different construction techniques and use of materials, provenance of raw materials, stone and structure alterations. As the result, a base was created to read common behaviors, design choices, recursive constructive solutions, and the “models” guiding the ancient intentions. This contribution will present the progress state of this research and its results
Contribution of petrophysical analysis and 3D digital survey in the archaeometric investigations of the Emperor Hadrian’s Baths (Tivoli, Italy)
No full textThis work studies the Heliocaminus Baths. From an architectural point of view, this is a special and unique building in the complex of the Hadrian’s Villa in Tivoli. This research is carried out with a multidisciplinary approach combining petrophysical, petrographic and mineralogical characterization with the techniques of digital survey. The purpose of the research is to contribute to the understanding of Roman construction through the study of materials and from architectural aspects. Using mineral-petrographic and physical analysis, a set of samples (mortars and stones) was investigated for composition and physical properties (density, porosity, water absorption, mechanical strength, etc.). In the case of mortars, these parameters, together with the particle size distribution and the binder/aggregate ratio determined in two ways using image analysis (on thin sections and on specimens), have shown a relationship between the physical and compositional characteristics and the function of mortars within the structure of the Heliocaminus Baths. However, in some cases, different characteristics were detected between the mortars belonging to the same masonry and with same function in the building, showing a slight inhomogeneity in the production of mortars. Furthermore, some relationships between compositional, physical aspects (i.e. porosity, sorting and size of aggregate) and mechanical strength have been found. All the gathered data, linked to the point cloud 3D model, allowed an accurate location of the traces from the construction story of this structure
- …
