1,720,959 research outputs found
Geometric reliability evaluation in Scan to BIM process, the case study of Santa Croce monastery
No full textIn the Cultural Heritage (CH) domain, the number of innovative approaches for the conservation of historic buildings and their management is increasing. In the last few years, the evolution of the acquisition techniques (laser scanner and photogrammetry) has allowed the acquisition of highly accurate reality-based models. Concurrently, the Historic Building Information Modelling (HBIM) approach has given the possibility to manage the geometric consistency along with the semantic attributes input into 3D parametric objects, through the use of relational databases. The integration of the digital survey techniques with the HBIM approach is known as Scan to BIM process.
However, the creation of three-dimensional As-is Building Information Models (BIMs), that capture the existing conditions of a building, starting from point-cloud data collected by laser scanners or photogrammetry, is mostly performed manually, and errors can occur during the data collection phase, pre-processing, or modelling. Furthermore, given the irregularity and morphological heterogeneity of the architectural elements typical of ancient buildings, the geometric parametrisation always makes modelling in BIM extremely difficult. In the present study, we investigated, through deviation analysis and clash detection, the geometric reliability of the parametrical modelling of the former Santa Croce monastery in Modugno (Bari, Italy)
Realtà Aumentata: Il progetto GOOGLE Tango per la rappresentazione del modello 3D dell’architettura nello spazio reale.
No full textLo sviluppo di nuove tecnologie e l'aumento della potenza di calcolo dei dispositivi informatici portatili come, telefoni cellulari e tablet, ha permesso di visualizzare spazi virtuali in cui sono implementate numerose informazioni e che hanno bisogno di una grande velocità di calcolo.
A sfruttare questa potenza è stata la Realtà Aumentata, AR (Augmented Reality), un sistema grafico interattivo che si sovrappone alla realtà, aggiungendo nuove informazioni e contenuti virtuali visualizzati nel mondo reale attraverso vari device utilizzati come visori.
Lo studio si propone di applicare la tecnologia della Realtà Aumentata, della piattaforma GOOGLE Project Tango, sviluppando un’app per analizzarne le potenzialità nell’ambito della rappresentazione architettonica.
Lo studio è diviso in due fasi, la prima è caratterizzata da un'analisi dei requisiti e delle caratteristiche del dispositivo GOOGLE Project Tango. La seconda fase si focalizza sul caso studio del Casino rurale del 1700 presso Gravina in Puglia (Bari), su cui è stato testato il dispositivo per la AR e l'app realizzata
Tecniche di rilievo architettonico integrato per la conservazione e la valorizzazione dei Beni Culturali. Il caso di studio del Complesso abbaziale della SS. Trinità di Venosa, Italia
No full textLa documentazione digitale del patrimonio costruito attraverso l’A-BIM. Il caso studio delle Terme di Diocleziano, Roma
No full textLe tecnologie di gestione delle informazioni dimostrano grandi potenzialità anche nel settore dei Beni Culturali (CH). L’arricchimento semantico di modelli digitali tridimensionali mediante l’integrazione di set di dati eterogenei è di fondamentale importanza per la loro conservazione.
La presenta ricerca, applicata al caso studio delle Terme di Diocleziano (Roma), si pone l’obiettivo di illustrare come l’approccio A-BIM (Archaeological Building Information Modeling) sia di ausilio al pro- cesso che, partendo dal rilievo del bene archeologico e dalla raccolta delle informazioni di archivio e rilievo, giunge alla realizzazione di un modello tridimensionale a tre diversi livelli di dettaglio (basso, medio, alto), contenitore di informazioni interrogabili e integrabili con l’evoluzione del bene, utilizzabili per la sua corretta gestione e conservazione.Information management technologies have shown a great potential in the field of Cultural Heritage (CH). Enriching three-dimensional digital models with heterogeneous data sets appears to be very important for heritage preservation.
The present research, concerning the Baths of Diocletian (Rome), pursues the aim of showing how the A-BIM approach (Archaeological Building Information Modeling) can be useful during the entire preservation process: from the survey site and the collection of archive information of an archeolog- ical, to the creation of a three-dimensional model with three different levels of detail (low, medium, high), capable of conveying information that can be accessed easily and integrated along with the evo- lution of the architectural asset, thus helping both the management and the conservation procedures
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
A SCAN-TO-BIM WORKFLOW PROPOSAL FOR CULTURAL HERITAGE. AUTOMATIC POINT CLOUD SEGMENTATION AND PARAMETRIC-ADAPTIVE MODELLING OF VAULTED SYSTEMS
Full text linkAbstract. Cultural Heritage has been significantly impacted by advancements in the Information and Communications Technology domains, which have inspired a strong multidisciplinary interest and enabled the development of innovative strategies for the preservation, management, and enhancement of the heritage itself. Notably, the digitisation process, which entails the acquisition of 3D data obtained through cutting-edge LiDAR and photogrammetric scanning techniques, is set up as an advantageous tool for producing an accurate representation of the historical buildings. In addition, point clouds and reliable HBIM models have caught the minds of the architectural community, and are now receiving huge backing from Artificial Intelligence. Such support is provided by procedures that link semantic features to structural and decorative elements. In this scenario, the following research is presented: the aim is to test an automated iterative process within a scan-to-BIM methodology, starting from automatic point cloud segmentation operations with open-source, model-fitting algorithms. This method will prove to be a solid support for the final phase of the 3D parametric/adaptive reconstruction that’s also compatible with BIM Authoring. The study focuses on various masonry vaulted systems. These types of structures are first examined using ideal models, which were perfectly discretised and set up by the user, and then employed as a starting point for validating the parameters of the RANSAC algorithm on point clouds acquired by laser scanners. These latter ones nevertheless have irregular geometries, making comprehension, analysis, and management far more challenging
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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