1,720,978 research outputs found
Multianalytical investigation of pigments in the Madonna della Croce wall painting (Triggiano, Italy)
No full textThe Madonna della Croce portrait is painted on a lunette, previously detached from a wall of unknown origin and now preserved on the right of the main altar in the Madonna della Croce church, in Triggiano (Bari, Italy). The wall painting, which depicts the Virgin and Child with St. Sebastiano and St. Rocco with their symbols of martyrium, was realised by a local artist who worked between 1550 and 1570 in the town.
The numerous legends about the wall painting, mixed with historical events, talk about miraculous healing stories which has strengthened the strong relationship of the Triggiano inhabitants with this religious symbol, such as they built a dedicated church and chose this Virgin as patron Saint of the town.
The presented research mainly focusses on the investigation of pictorial layers of this painting by a non-invasive multianalytical approach. Firstly, shape, size and optical features of pigments have been observed using a portable digital microscope equipped by a polarizing filter. By means of a portable spectrophotocolorimeter, colour of painting areas has been measured and expressed in the CIEL*a*b* system and for each of them reflectance spectra of visible light (400-700 nm) have been recorded. The identification of pigment composition has been carried out by FORS (fiber optic reflectance spectroscopy) and XRF (X-ray fluorescence spectroscopy). Produced spectra have been compared with databases available in literature.
Results have provided information about features and compositions of pigments, highlighting the use of red ochre, yellow ochre and carbon black for red and yellow paintings and for black profiles; in addition, mixing of red ochre and green earth and mixing of carbon black, lime and yellow ochre have been revealed respectively in correspondence to green background and blue Virgin mantle, as attested in other Apulian wall paintings (Fioretti et al. 2020; Fioretti et al. 2020)
Sonificazione delle strutture cristalline per la didattica museale
No full textCrystal structures sonifications for museum education
This paper presents a new teaching strategy for museum settings that uses sonifications of crystal structures obtained through a novel scientific method developed by the authors. The method associates chemical and crystallographic parameters (kind of atom, periodic table group, periodic table period, distance of an atom from the axis of symmetry, etc.) with musical ones (duration, pitch, timbre, dynamics) making the order of the atomic arrangement of the atom of the crystal structure perceptible through sound. Each crystal structure, such as ice, calcite, aragonite, diamond, graphite and others, is represented by a unique melody accompanied by videos illustrating the symmetries of the elementary cells of the crystals. The aim of the strategy is to integrate cognitive and emotional pro- cesses, creating an effective learning system for museum settings. The sonifications have been implemented in the itineraries and open laboratories of the University of Bari’s Earth Science museum and are currently the subject of studies and projects in the STEAM field
THE LITHOTHEQUE ROLE IN THE LITHIC RAW MATERIALS STUDIES. THE CASE OF THE ITALIAN SILIBA
No full textChert artifacts represent one of the most durable product manufactured by the humans and their recovery and characterisation
allow to assess new data on the technological and cultural features of prehistory civilizations. The geographic identification
of procurement area of lithic raw materials is essential in the reconstruction of the social and economic behaviours of the
communities. In this view, a significant role is played by the lithotheques since they include lithic samples coming from
variable spread geographic area and constitute a valuable comparison tool for provenance studies of archaeological finds.
An Italian example of lithic collection is SiLiBA, the lithotheque of the Earth and Geoenvironmental Sciences Department of
the University of Bari Aldo Moro. It consists of about 1500 samples of geological cherts collected from outcrops, sites and
mines mainly in the Apulia (Southern Italy) region and across southern Italy (Basilicata, Sicily), Croatia, Serbia, Switzerland and
Iraqi Kurdistan, belonging to formations from the Cretaceous to the Quaternary Period. The strength of the collection is its
database, reporting the petrographic, colourimetric, geochemical and micropaleontological features, obtained by a dedicated
non-invasive investigation protocol (NM-PCI). Such results represent a fingerprint for each samples and make the SiLiBA
lithotheque an essential reference point in the identification of provenance of lithic raw materials transformed by the prehistory
local humans for the producing of chert objects.The SiLiBA database is constantly evolving and new lithic samples are collected
and investigated and original data are produced and recorded in the database. This last consists of report sheets containing,
together with the results of the NM-PCI investigation, other several information such as photographs, geographic coordinates,
geological outcrop description. A website dedicated to the presentation of the lithotheque will soon be online, even if the
complete database is already available for consultation by the scientists and archaeologists on request
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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