1,720,971 research outputs found
Data Acquisition for Cultural Heritage Navigation: Integration of Panoramic Imaging, Terrestrial Laser Scanning and Anagliphs
No full textIn this paper some experiences about the integration of panoramic imaging and terrestrial laser scanning surveys are presented. The main goal is to produce documentation with metric information for the cultural heritage panoramic navigation; furthermore, a subordinate result is to use cheap and user-friendly 3-dimensional images for a wide range of applications like the custom navigation. Three historical sites were chosen: the main stairway of the Chancellor building at the Padua University, some ancient buildings in Venice, the Santo Sepolcro Church in Bologna. The panoramic photos acquisition is treated for all the three sites; in addition some image processing techniques are used to mosaic and to filter the raw data. The laser scanning survey is related to the Venice site using the 3D laser imaging sensor Riegl LMS-Z210 and the software Riscan Pro; the Sobel filter is used to produce detailed silhouettes and to perform edge extraction. About the Bologna site some point clouds acquired with the Leica HDS2500 3D laser scanner (re-branded Cyrax 2500 scanner) are presented with different acquisitions (point of view and resolution) in the Cyclone 5.1 environment. The creation of anaglyphs is performed for Padua and Bologna sites, using the Anabuilder software; some notes are drawn about the interpolation algorithms. The results are very useful for web-based animation purposes especially for recording indoor scenes using standard cameras for panoramic surveys, which have proven to be rather economical also in terms of computational effort
Integrazione di metodologie innovative per il rilievo panoramico
No full textIl rilievo panoramico rappresenta, oggi, una delle nuove metodologie per la produzione di documentazione finalizzata alla navigazione applicata ai beni culturali. L’integrazione di altre metodologie ormai consolidate, come la fotogrammetria e la scansione laser, fornisce al rilievo panoramico un valore aggiunto costituito dall’informazione metrica.
Il prodotto finale è quindi costituito da immagini che sono relativamente economiche dal punto di vista dell’acquisizione del dato, sono dotate di un’interfaccia user-friendly per quanto riguarda la navigazione anche in ambiente web, e che, soprattutto, sono caratterizzate da una restituzione tri-dimensionale fruibile anche da un utente comune
Il rilievo laser scanner con texturizzazione HDR dei portali della chiesa di Mattia a Budapest
No full textHolocene multiproxy paleoclimate record from lagoonal organic shales of the Gulf of Cagliari, south Sardinia; Italy
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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
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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