1,720,970 research outputs found
Methodological evolutions of Raman spectroscopy in art and archaeology
Full text linkDuring the last decades, Raman spectroscopy has grown from research laboratories to a well-established approach that is increasingly often used in archaeometry and conservation science. When looking at these research fields, some novel trends can be detected and therefore we would like to review the recent literature on the technical aspects and new evolutions of Raman spectroscopy applied to art analysis. This article reviews Raman instrumentation, with a special focus on the use of mobile and portable instruments, recent developments in the field of surface-enhanced Raman spectroscopy (SERS), and the introduction of spatially offset Raman spectroscopy (SORS) in the field of art and archaeology
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
Unwrapping a Baroque Masterpiece: A Planar Representation for the Apse of Santa María del Temple in Valencia
Full text linkThis study presents a workflow for the documentation and morphological analysis of curved frescoed surfaces, combining terrestrial laser scanning (TLS) with computational imaging techniques. The case study focuses on the apse of the Church of Santa Maria del Temple in Valencia (Spain), decorated in 1770 with Palladian motifs. The objective is to produce a planar and interactive representation of the surface, overcoming the operational limitations of traditional Reflectance Transformation Imaging (RTI). The methodology employs a Trimble TX6 TLS to rapidly record a high-density point cloud within minutes. The dataset is then processed using open-source software tools (CloudCompare, MeshLab, Blender, Relight) to reconstruct a detailed mesh and generate a highresolution normal map (NM), which is transferred onto a low-poly model. A digital RTI dome consisting of 49 spotlights is built in Blender, producing a sequence of rendered images that are subsequently processed to create an easy-to-use Virtual RTI (VRTI). This approach enables the clear identification of degradation features and subtle morphological irregularities that are not easily detectable through conventional methods. The proposed workflow proves to be effective for qualitative analyses, simplifying targeted conservation interventions, especially in architecturally complex contexts where traditional techniques are unfeasible or hardly applicable. V-RTI thus represents a valuable complementary strategy for non-invasive cultural heritage (CH) diagnostics
An improved methodology for extending the applicability of Reflectance Transformation Imaging to confined sites
No full textRecent advances in the field of imaging
technologies rapidly spread new methods of representing
cultural heritage, expanding the possibilities for art
historians, archaeologists, conservators and conservation
scientists. In this regard, Reflectance Transformation
Imaging (RTI) and three-dimensional (3D) modeling
using close-range photogrammetry have become
rapidly common and widely used by an heterogeneous
public, multiplying the possibilities of understanding
artworks from different points of view. This paper discusses
the results that were achieved by applying these
techniques to better understand the surface of a basrelief
owned by the Museo Egizio of Turin (Italy) in a
confined site. We were able to successfully enhance the
volume of engravings by integrating both RTI and 3D
visualization to obtain a new investigation tool with a
more suitable illumination
A trustable multispectral photogrammetry pipeline for the reproduction of noncollaborative materials
Full text linkMany non-invasive techniques are now widely available to experts for the study and understanding of real objects, encouraging the development of new low-cost survey tools. The opportunity to create digital twins opens up many possibilities for in-depth study of art objects. In particular, the increasing adoption of photogrammetry and multispectral reflectography in the field of cultural heritage has provided art historians, conservators and conservation scientists with precise tools for the study of pigments and artistic techniques, facilitating the attribution and dating of art-historical artifacts [1]. Photogrammetry has established itself over time as one of the most common modern survey tools, distinguished by its ease of implementation and ability to obtain metrologically reliable and photo-realistic three-dimensional models in a quick and cost-effective way [2]. Although its use is currently quite popular, certain limits prevent its proper application in the field of cultural heritage, especially in the presence of objects made of shiny, reflective materials such as metals. In recent times, the use of polarized light in the 3D field exploiting the Physically Based Rendering has also provided encouraging insights into the use of photogrammetry even in the presence of non-cooperative materials, expanding the application range and improving the resemblance to the real object [3]. Furthermore, the possibility of producing three-dimensional models integrating data from other spectral bands (UV/IR luminescence and reflectography) and other diagnostic techniques (XRF, RAMAN etc.) opens up new perspectives in the study of constituting materials, allowing information to be combined in a three-dimensional model of more immediate consultation. This work presents a workflow that addresses the various issues and combines them into a single threedimensional model that is correct in size and color, light and easy to consult thanks to the use of free, cross platform visualization tools.The chosen case study, a Chinese gold statuette depicting Buddha, general chronology 6th century BCE, holds many interesting enigmas by addressing the limitations imposed by photogrammetry and integrating data from different techniques into a single three-dimensional model that can be navigated online
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