1,720,959 research outputs found
CHARACTERIZATION AND REVALUATION OF "APULIAN MARBLES" (DISTRICT OF FASANO-CARANNA: SOUTH-EASTERN MURGE; DISTRICT OF TRANI-ANDRIA: NORTH-WESTERN MURGE)(APULIA, ITALY).
No full text“CHARACTERIZATION OF SOME TRAVERTINES EXSTRACT FROM ANCIENT QUARRIES IN THE AREA OF CISTERNA DI LATINA (LATIUM, ITALY)”.
No full textASMOSIA(ASSOCIATION FOR THE STUDY OF MARBLE AND OTHER STONES USED IN ANTIQUITY
Caratterizzazione a Fini Archeometrici del Travertino di una Cava Antica nel Settore Estrattivo di Cisterna di Latina (Lazio, Italia)
No full textThe aim of this archaeometric work was to study the extensive travertine outcrop near Cisterna di Latina (Latium, Italy), exploited as far back as Imperial Roman times, when the area was marshy and malarial. The site is located below the Monti Lepini, between the Latium volcanic nappe and the flat Pontine plain. The deposit lies under the Alban “Pozzolane Superiori”, which contains a calcareous layer called “Travertino Inferiore” with rare continental molluscs at the base. The outcropping travertine, to which the quarry studied here belongs (S. Biagio), is always of “sottostante” (underlying) type, which is the basal part of the “Travertino Superiore” and is the result of the action of the upper phreatic aquifer accumulating in the valley depression of Paleoteppia and Campomaggiore, currently buried. This study presents all the parameters (minero-petrographical, chemical, geochemical) necessary for comparisons with the travertine used in many artistic and historical works of art and decoration, with the aim of identifying its provenance. Macro- and microscopic observations of samples emphasize sedimentary structures (spathic and micritic laminae of various thicknesses), fossils (ostracods), mineralogical composition, and bacterial inclusions in minerals, in order to establish a lithofacies typical of a river-lake depositional environment. The mineralogical composition shows the presence of calcite and lacking of dolomite, also when compared with the action of diagenetic processes. The chemical elements found, mainly Ca, Sr and Mg, and their mineral ratios yielded the mineralogical identity of travertine and defined the composition of the water from which they came or the rate of diagenetic processes. The isotopic compositions of δ18O and δ13C revealed ranges of values typically belonging to meteoric and magmatic CO2, and were comparable, in our case, with the action of vadose water passing through the volcanic and karstic complexes in the same deposit. Oxygen isotope values also identified the temperature of the water at the moment of deposition, which was close to environmental temperature, as shown by the low dispersion values
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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