1,720,984 research outputs found
Spazio alle idee
No full textUtilizzo di tecnologie e sistemi costruttivi sostenibili nel progetto di ristrutturazione e ampliamento di fabbricato sito in Bologna, quartiere Bolognina. Progettisti: L. Bonavita, A. M. Manferdini. Progetto e realizzazione: 2006-200
Metodiche integrate di rilievo 3D per l’analisi di architetture complesse. Il caso dell’Abbazia di Pomposa
No full text(abstract italiano) Nel campo del rilievo architettonico l'integrazione fra differenti metodi di acquisizione digitale tridimensionali consente di sopperire ai limiti dei singoli approcci per ottenere modelli sempre più completi, dai quali poter estrarre un numero di informazioni utili per differenti analisi. Questo contributo presenta una metodologia di rilievo integrata fra strumenti attivi e passivi, applicati da terra e da drone, al fine di ottenere un modello multi-risoluzione completo. Il caso studio oggetto della sperimentazione è l'Abbazia di Pomposa, a Codigoro (FE). //// (abstract inglese) In the field of digital 3D survey, integration among different methodologies and technologies offers the opportunity to overcome lacks of single techniques, building more complete and faithful 3D models and therefore deriving information that can be used for different kind of investigations. This contribution shows an integrated methodology between active and passive technologies applied from terrestrial and UAV point of views, aimed at creating complete and multi-resolution 3D models. The selected case study is the Pomposa Abbey, located near Ferrara, Italy
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
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
Multi-scalar 3D digitization of Cultural Heritage using a low-cost integrated approach
No full textIn the architectural survey field, one of the main aspects to consider during a 3D digitization is the multi-scalar geometrical complexity of the artifact to acquire, besides other fundamental factors connected with the different aims of communication. Since the widespread of range-sensors has provided extremely versatile instruments able to easily acquire huge amount of data that can be processed for different uses and users and changing communication aims, the possibility to survey and restore high-quality 3D multi-resolution models has become an urgent need. Despite these developments, these technologies are still very expensive, need expertise and present persistent bottlenecks both in the reverse modeling process and in time consuming. In order to overcome these critical aspects and taking advantage of recent improvements of automated image-based technologies based on the Structure from Motion approach, this contribution presents some first results of investigations on the reliability of these low-cost technologies for the 3D digitization of Cultural Heritage. One of the main aims of these investigations rely on developing a procedure that could ease the work of surveyors called to represent artifacts at an architectural scale using fast and low-cost technologies. 3D models derived using the selected low-cost image-based technologies were compared among each other and with a 3D laser scanner gold standard acquisition. These investigations led to qualitative and quantitative evaluations and to considerations on times and skills required by all tested technologies. Strengths and weaknesses are highlighted, suggesting the best solution with respect to the optimization of all considered aspects. Finally, integration of different technologies are presented, as it represents the best solution in multi-scalar contexts
Integration of image and range-based techniques for surveying complex architectures
Full text linkIn the last decade the Cultural Heritage field has deeply benefited from the opportunities of collecting accurate and detailed 3D information of sites
and artifacts using both image- and range-based techniques. Since few years ago these technologies were not so extensively used, mainly because
they were very expensive, required expertise and the pipeline and procedures related to their use were not straightforward, nor consolidated. But in
the last years significant improvements in the digital survey technologies have been reached, with the principal scope of simplifying reality-based
survey procedure and providing a series of different solutions that combine the automation of processes with accuracy and resolution performances.
In addition to these aspects, the lowering of costs and the consequent widespread use of some survey solutions, such as, for example, range-based, as
well as terrestrial and UAV image-based ones, have recently given strong impulse to the widening of use of these technologies in the Cultural
Heritage field. As a consequence, this range of possibilities shows that in this field, where case studies have peculiar geometric and radiometric
characteristics and survey conditions are often unique, preliminary investigations and evaluations are mandatory in order to define the most suitable
solution to adopt.
In this context, this paper presents preliminary results from the Santa Maria di Pomposa survey project, with the purpose of starting a deep
investigation on the integration of 3D digital technologies and how they can provide complete and multi-scalar information about complex
architectures. This purpose is particularly important in case studies where analysis have to be conducted at different scales of complexity. Structural
analysis are just an example of the need to easily handle complete and global information that have to be deeply and detailed analyzed, eventually
showing the behavior of structures over time. Within the adopted methodology, the comparison of results obtained using different approaches
represents an indispensable step in order to evaluate and select the most reliable and suitable solutions to adopt within the final integrations process
3D modeling and semantic classification of archaeological finds for management and visualization in 3D archaeological databases.
No full textThe generation of digital 3D models of archaeological finds can be followed by further products, applications and studies such as a semantic classification in order to organize the digitally documented finds and provide connections between 3D models and databases. In this contribution we present a methodology developed to assist the superintendence of archaeological excavations or sites in the digital classification, management and visualization of finds inside advanced database/repository. Our approach, divided in three mutually connected steps (modeling, segmentation and visualization), has been realized as general as possible and tested on different types of archaeological objects. Firstly a reality-based 3D model of a find is produced, using photogrammetry or active sensors. Secondly the geometric model is semi-automatically segmented and classified according to archaeological and architectural rules. The semantic classification of the finds is afterwards linked to an archaeological database to e.g. decide whether the object is constituted by original pieces or some of them belong to other finds and should be re-located. Finally the modeled and classified find is visualized in 3D open-source systems linked to an archaeological database. The visualization of the achieved results (3D models and thematic layers) is thus very useful for monitoring and updating intervention policies within the archaeological area
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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