1,721,022 research outputs found
"OLD AND LOW-COST SENSOR" FOR MICROPHOTOGRAMMETRY. CASE STUDY: THE EMPEROR MAXIMIANUS HERCULEUS' MEDALLION AT THE CORRER MUSEUM (VENICE)
Get PDFThe microphotogrammetric survey of the roman emperor Maximianus Herculeus’ medallion, described in this report, demonstrated that, despite the use of an “old” and, nowadays, “low cost” camera sensor it is still possible to obtain a detailed 3D textured model useful for different scientific purposes and virtual enhancement. Here are presented the photogrammetric results reached with the selection of the best solutions in terms of number of images, in order to speed up the entire photogrammetric workflow and pursue the goals previously explained. This medallion is one of the most important examples of roman medallions which belongs to the numismatic collection stored at the Correr Museum in Venice. Its 3D survey was developed as a parallel step of a main project which aims to acquire in three-dimensions, with a structured light scanner, the complete roman collection of medallions. This digitization project proposes to record the volumetric information of these small archaeological remains and to realize an online virtual gallery in the web site of the museum (using 3DHOP, an open source web viewer developed by the Visual Computing Lab of the CNR-ISTI of Pisa). At the end of the microphotogrammetric workflow, a distance analysis was computed to highlight the differences between the meshes obtained with a photogrammetric approach and a structured light scanner
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Measurement of total antioxidant capacity of human plasma: setting and validation of the CUPRAC-BCS method on routine apparatus ADVIA 2400.
No full textLo scavo del teatro romano di Aquileia: ricerche in corso
No full textDal 2015 il Dipartimento dei Beni Culturali dell’Università di Padova opera ad Aquileia nell’ampio terreno compreso
tra le Grandi terme a sud e le mura bizantine a nord, con l’obiettivo primario di indagare i resti del teatro romano
della città altoadriatica. Inizialmente una serie di prospezioni geofisiche e le prime verifiche archeologiche hanno
permesso di accertare la presenza del teatro aquileiese nell’area dei fondi ex Comelli-Moro, come già ipotizzato da
Luisa Bertacchi. Le successive indagini hanno consentito di precisare la collocazione topografica dell’edificio e di
ricostruire l’articolazione planimetrica e l’ampiezza complessiva della cavea. Tra i molteplici obiettivi delle ricerche
in corso rientrano lo studio planimetrico-strutturale del teatro e la ricostruzione della sua decorazione architettonica,
per la quale si offrono in questa sede alcuni dati preliminari. Parallelamente, particolare attenzione è rivolta alle
attività di rilievo e di restituzione grafica, sia di tipo tradizionale sia con metodologia 3D
L’impiego del mattone crudo nella Sardegna romana. Nuovi dati dal rilievo 3D e dalla ricomposizione delle pareti dipinte dell’edificio a est del foro di Nora
No full textLo scavo di un edificio di età medio imperiale ad est del foro romano di Nora (Pula, Sardegna), condotto dal Dipartimento dei Beni Culturali dell’Università degli Studi di Padova, ha restituito in vari ambienti il crollo in situ dell’alzato in mattoni crudi. Le attività di documentazione sul campo hanno previsto anche il rilievo delle evidenze tramite fotogrammetria, con particolare riguardo alle plaques di intonaco dipinto che rivestivano gli elevati in crudo. L’analisi dei dati pertinenti al vano che meglio conservava le evidenze collassate ha permesso di attribuire le plaques ai rispettivi perimetrali, ricostruendo porzioni di parete ed individuando sul retro le tracce in negativo dei ricorsi di mattoni. Questi ultimi sono stati documentati anche sul campo, ove in alcune circostanze mantenevano ancora l’assetto originario per filari regolari. Il riesame integrato del rilievo 3D e della ricomposizione degli intonaci in crollo ha dunque contribuito a ricostruire le dimensioni e la disposizione dei mattoni in opera, a proporre una ricostruzione tanto dei processi costruttivi, sia per quanto riguarda la costruzione degli elevati che il loro rivestimento, quanto delle dinamiche di crollo del vano.
The Middle-Imperial building located near the east side of the Roman forum of Nora (Pula, Sardinia) is the subject of the archaeological research carried out by the Department of Cultural Heritage of the University of Padova. The excavation of some rooms of the building has revealed an interesting stratigraphy dealing with the collapse of plastered mudbrick walls and the presence of well preserved regular rows of mudbricks. The graphic documentation of the excavation has been implemented with photogrammetric data, acquired both during the field work and the studying phase in the laboratory. This allowed to reconstruct the painted decoration system of the room with most preserved fragments of painted plaster (room VIII) and to analyse negative imprints of mudbrick on the back side of the plaques. The integration of photogrammetric information and reconstruction data of the collapsed painting plasters allowed to identify size and layout of mudbricks and to advance new hypothesis about building and collapsing processes
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