1,721,330 research outputs found
Rappresentare in 3D: il rilievo per un modello HBIM
No full textWhen studying the morphology of historic buildings the acquisition of point cloud or polygonal mesh patterns coupled with the integration of traditional survey, lay the basis for the formulation of a study integrating more skills. Concepts like resolution, accuracy and precision combined with alignment of scans, mesh creation, optimum decimation, texturization to extract the desired output are the right parameters on which we can establish a new approach for studying historical heritage. Also the precise 3D dataset that can derive from it may become the stone of comparison for more in-depth studies. Geometry acquired by a scientific survey transformed in parametric elements can be used as a tool to carry out both architectural and historical and constructive choiches. In the case study here proposed, Villa Medicea Poggio a Caiano, this survey approach led to a specific BIM application, where the point cloud is the initial step of a much more articulated reverse assembling of building elements, fostered by digital modeling and virtual representations. The proposed case study takes advantage of the point cloud to build a BIM environment to manage wider datasets about the architecture’s identity, history, lifecycle and use over the years. Paying attention to the initial building stage original components can be isolated, simulations, analysis and virtual reconstruction of different architectural solutions can be shared, to better understand the legacy of the Renaissance. In a BIM environment all the knowledge gathered behind the observable architectural components of the artefact, including the historical notes, the conditions of the materials or even the details on how they have been correctly assembled, can be connected to digital models derived from the survey. The object of study presented in this paper refers specifically to the porch surrounding the villa, describing a pipeline from the survey to a parametric model
Monitoraggio della genotossicita' in matrici ambientali: acqua.
No full textNel capitolo 13 vengono illustrati i seguenti aspetti: inquinanti dell'ambiente acquatico; esposizione degli organismi acquatici agli inquinanti, bioaccumulo e biomagnificazione; effetti biologici conseguenti all'esposizione, da quelli più immediati alla possibile induzione di tumori, agli effetti sulla riproduzione e sulla biodiversità; determinazione analitica degli inquinanti e identificazione dei componenti mutageni; utilizzo degli animali acquatici come indicatori ed analisi degli effetti genotossici (addotti al DNA, aberrazioni cromosomiche, scambi tra cromatidi fratelli, micronuclei); inquinanti genotossici nelle acque potabili; significato e prospettive degli studi di biomonitoraggio nell'ambiente acquatico. Sono fornite anche schede di approfondimento, immagini e bibliografia
Point cloud management for a holographic visualization
Full text linkThis document aims to describe and verify the workflow from a digital survey of a building of historical value to its set up in an innovative holographic view. Via Lulli is a low-cost building of the beginning of the century organized in a closed-block part of a complex with rather small courtyards; the research topic concerns the verification of the process from acquisition with digital survey to convert the survey dataset into a hologram, considering the huge potential of this display system. Comparison among different point clouds, with different accuracy and dimension are related to the final navigation when transformed in holograms; several tests have been carried out to compare cloud density with the ability to see holograms in details with different zooms in to display small details, and zooms out in real time to view the entire model. First possibility to extend workflow with unity support and other plug-ins are supposed
From Digital Survey to a Virtual Tale: Virtual Reconstruction of the Convent of Santa Maria delle Grazie in Milan
No full textNowadays, the innovative learning methods, such serious games, have become the new frontier of education and communication; in architecture, the virtual reconstructions of historical sites in their current state, in their original appearance and in their evolution over the centuries have contributed to the development of digital technologies (such as digital survey, Virtual Reality, and Augmented Reality). This chapter describes the potentialities of new digitization technologies as tools to communicate and disseminate Cultural Heritage (CH) starting from its digital survey and a scientific research of historical sources. This research finds a new way to effectively tell the history of a monument and to transmit its value as a witness of ages that no longer belong to us, bringing it virtually to life. Specifically, the research group focused on the test of a digital workflow of surveying and modelling of some rooms of the convent of Santa Maria delle Grazie in Milan, that contain wonderful witnesses of Italian Renaissance characterized by a troubled history
Holographic visions for architecture in a park.
Full text linkThe Monza Park, with its more than 7 square meters of green area, divided between lawn and woods, its 110,000 tall trees, its 13 farmhouses, 3 historic villas, 13 m of fences and 90,000 visitors on spring Sundays, represents an irreplaceable source of wellness and sustainability for those who live near it. The pandemic situation of the 20s and 21s by reducing the movements and the possibility of coexistence of a large public in an open space has suggested the possibility of new forms of use and interaction of the same, even remotely, reproducing accurate Virtual Reality experiences. With this paper, the authors intend to illustrate a workflow from Scan to VR applications, taking advantage of the opportunity to explore digital acquisitions and additional materials available and functional to convey the values of open space and historical monuments immersed in them. The VR experiences have been structured for the navigation from the scale of architectural detail to the environmental one, with the goal of using the accurate model results for two different and remote instrumentations: a 7m diameter 360° theatre and a Holographic table, Euclideon Hologram Table©. Both situations, as opposed to hardware tools such as headset, favour the fruition for small groups of users
Through Achille Castiglioni’s Eyes: Two Immersive Virtual Experiences
No full textThe experimentations described here concern the virtualization of the Studio Museo Achille Castiglioni, a small museum that hosts important artefacts designed by one of the most famous architects and designers of the 20th century, winner of 7 “Compasso d’oro” awards. The digitization process creates two virtual experiences to enjoy the place and the design objects to give visibility to the small context far from the big museum. The first (less complex and immersive) experimentation deals with the semantic implementation of 360° panoramic photographs, giving rise to a virtual tour of the museum available on the web with no interaction: it is the description of the state of the art of this place. The second one (a real VR simulation) derives from a more complex workflow based on digital surveying, digital modelling, and developing of virtual environments and interactions. The two proposed case studies demonstrate how new technologies can represent indispensable instruments for the safeguard, enhancement, and communication of Cultural Heritage
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
CULTURAL HERITAGE DISSEMINATION: BIM MODELLING AND AR APPLICATION FOR A DIACHRONIC TALE
Full text linkThe research purpose is to present a project of cultural dissemination and enhancement of the “Madonna della Pace” Sanctuary at Rocchetta di Airuno (Lecco - Italy), based on an immersive experience of knowledge of the history and places that characterize not only the sanctuary but also the “Cammino di Sant’Agostino” (of which it is one of the stages). The research goal focuses on the direct employment and exploitation of HBIM models for the digital fruition project. An integrated digital survey based on a terrestrial laser scanner and photogrammetry was conducted to provide a complete geometrical representation of the sanctuary and its surroundings. Both output point clouds were employed as metric and geometric references to create the reality-based parametric model. Specifically, the work focuses on creating a three-dimensional chronological model of the sanctuary, which not only represents the current state of the cultural asset but is also enriched through the definition of different evolutionary phases of the architectural artifact based on an indepth study of the photographic and bibliographic documentations. Four Project Phasing has been identified to represent the most significant transformations of the building and were managed using the time parameter in the same BIM project. The sanctuary geometric and parametric models were displayed and navigable thanks to the aid of Virtual and Augmented Reality applications. A VR environment was defined to display in the first person the textured model. Finally, an AR smartphone app prototype was developed to show tourists the sanctuary’s historical transformation over time
Inquinanti genotossici nell'acqua
No full textL’inquinamento delle acque è un fenomeno globale entro il quale gli interrogativi posti dalla presenza di agenti mutageni, cancerogeni e teratogeni non possono essere considerati disgiuntamente da quelli relativi ad altri agenti tossici. I contaminanti genotossici presenti nell’ambiente acquatico possono essere individuati saggiando in vitro campioni ambientali e rilevando il danno genetico indotto dopo l’esposizione in organismi sentinella. Evidenze di questo tipo sono un segnale d’allarme per le potenziali conseguenze a lungo termine, definite dall’instaurarsi di cambiamenti nelle popolazioni, nelle specie e nelle comunità
degli organismi esposti. L’applicazione di biomarcatori di esposizione e di effetto in associazione alle
analisi chimiche può fornire le informazioni utili a individuare le fonti inquinanti e a stabilire adeguate misure
di protezione dei corpi idrici
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