1,721,015 research outputs found
Characterization of pigments and microclimate monitoring for the preservation of a rare medieval parchment
No full textA rare medieval parchment called Exultet I preserved in the Diocesan museum of Metropolitan Capitolo of Bari has been studied. The Exultet was sung after a procession with the Paschal Candle before the beginning of the Liturgy of the Word in the XI century and it is certainly one of the highest literary and artistic expressions that Bari produced. Eight sheets with text, music lines and numerous beautiful miniatures painted upside-down respect to the liturgical text compose the parchment roll. The opening of the theca that preserves the unwrapped roll gave us the opportunity to perform diagnostic measurement on the pigments of the illuminated areas and to locate a wireless weather station for monitoring the microclimate. For these analyses a mobile laboratory has been set up in the museum. The techniques used for a non-invasive and in situ analysis of miniature paintings has been microscopic observation with digital microscope, UV-VIS-NiR spectrophotometry in reflectance mode with optic fibres (FORS), X-Ray fluorescence spectrometry (XRF) and finally μ-Rman spectroscopy. The use of several techniques is able to give us all information without causing any stress to the parchment especially if the measures are fast, as in our case (Aceto et al., 2012). The pigments have been identified mainly with FORS with comparison with standards and they are: red ochre and red lead used as red, lapis lazuli and azurite as blue, green earth and copper resinate as green, yellow ochre and orpiment as yellow. In the most important miniatures in some areas of the background, several traces of a residual gold leaf have been identified by XRF. The presence of rare and precious pigments as gold leaf and lapis lazuli underline the importance of the parchment. The preparation of the figures made by using a lead stylus has been also identified. The presence on all the roll of humpbacks formed in the last years well fit with the data collected that shows a continuity of condition between the showcase and the museum room. These means that the presence of visitors leads to changes in temperature, humidity and CO2, resulting much higher than those suggested for parchments. Finally the hypothesis of a repainting, formulated on the basis of the conservation status of the colours of the illuminated areas and from the comparison of similar hues, has been confirmed by the characterization of the colour palette. In some points the analysis returned the blue pigment as azurite and the red ones as minium, these results are in contrast with those of blue and red, respectively used, in all other illustrations of the roll were lapis lazuli and red ochre are plentiful
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
Strategies for enhancement and promotion of SiLiBA, the lithotheque of the University of Bari (Italy)
No full textGeological collections assume an undisputed importance since they gather materials for their relevance asspecific geological events or for mineral and rock group representativeness, or for historical and educationalsignificance.
SiLiBA, the lithotheque of geological cherts at the Earth and Geoenvironmental Department of the Universityof Bari Aldo Moro is an example of the scientific and educational value of Universities’ geological collections.It is composed of about 900 samples of primary and secondary geological cherts coming mainly from minesand deposits in Apulia and Basilicata (Italy) and from some regions of Croatia. The lithotheque is connected toa laboratory for the characterisation of chert samples. SiLiBA cherts have been studied by means of a non-invasive protocol (Delluniversità et al. 2019) thanks to which, through macroscopic and mesoscopicobservations, colourimetric measurements and chemical and micropaleontological analyses, a very largeamount of original data, as well as images at different scale, has been produced and collected in a database.
Naturally, for the collection dissemination a fundamental role is played by the most widespread and innovativetools, especially in the historical period we are experiencing, in which the global virtual connection of people,things and ideas is essential for continuing to interact with each other, exchange information and improvethemself, both in life and work.
With a view of economic sustainability and resource optimization and in order to create a global connectionbetween archaeologists and geologists, the collection promotion has been improved by means of a dedicatedwebsite.
It is articulated into submenus and includes sections containing archaeological information on procurementand manufacturing of cherts in the Prehistory, history of the lithotheque, publications and events and activities,including experimental archaeology laboratories and tutorials. The website focus is the section concerning the database reports, thanks to which the visitor can consult allthe data sheets, setting geographic or geological or by name criteria searching. The SiLiBA site is enriched bya section reporting the interactive 3D reconstruction of the most representative samples.
Even if the input of some data is not yet complete, the site is online and explorable. The future goal is tocreate a social profile in order to reach as many users as possible, especially in school and universitycommunities, and to publish interesting and original contents that can move people closer to geologicalcollections and to the Earth sciences and to the archaeology field
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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