1,721,019 research outputs found
"Nuove epiche nuyoricane: Incontro con Giannina Braschi e Tess O'Dwyer"
No full textIntervista a GIanina Braschi e Tess O'Dwyer a proposito della pubblicaizone della versione italiana di _Yo-Yo Boing!_ tradotto per Campanotto da Alessia Patané
"Allo specchio dei diritti la lingua si rivela bifronte: intervista a Giannina Braschi e a Tess O'Dwyer"
No full textIntervista a Giannina Braschi e alla traduttrice statunitense Tess O'Dwyer a proposito dell'uscita dell'edizione italiana del romanzo in Spanglish _Yo-Yo Boing!_
Shift from lamproite-like to leucititic rocks: Sr-Nd-Pb isotope data from the Monte Cimino volcanic complex vs. the Vico stratovolcano, Central Italy
No full textIn the Italian peninsula leucite-free and –bearing ultrapotassic rocks occur intimately
associated but well separated in time. Silica-saturated ultrapotassic and associated shoshonitic
magmas erupted during the Pliocene to Lower Pleistocene. Silica under-saturated leucite-bearing
ultrapotassic rocks, mainly leucitites, were emplaced sometime later, during the Middle-Upper
Pleistocene. The transition from leucite-free to – bearing rocks is diachronous and in some cases is
complicated by the occurrence of crustal-derived magmas coeval with early leucite-free magma.
The Monte Cimino-Vico area is a key locality for studying the transition from leucite-free to –
bearing ultrapotassic rocks. There a volcanic complex is overlain by some 500 ka younger leucitebearing
rocks of Vico stratovolcano. Most of the potassic and ultrapotassic rocks of the Monte
Cimino volcanic complex are characterised by high Mg-# (66.4-77.8), and compatible element
abundances in spite of their high silica contents (52.9-58.0 wt.%). Ultrapotassic leucite-free rocks
transitional to lamproites are olivine-bearing orthopyroxene- and plagioclase-free latites and Ktrachyandesite
and they are confined in the final mafic activity of the Monte Cimino volcanic
complex. Two-pyroxene parageneses are observed in the early Monte Cimino volcanic complex
giving equilibration temperature as high as 1050°C suggesting a sub-crustal derivation of their
parental magmas. A two-pyroxene high-K calc-alkaline component is then inferred for the genesisof the early Monte Cimino activity (e.g. dome complex and silicic lava flows and ignimbrites),
which was modelled through crystal-fractionation from a high-K basaltic andesitic magma plus
mixing with crustal anatectic rhyolitic magma.
Final mafic lavas fill the isotopic and chemical gap between shoshonite-like and lamproite-like
rocks, and each lava flow could be considered as a mantle-derived term from a heterogeneous subcontinental
lithospheric mantle. Final mafic lavas are high-silica and -MgO ultrapotassic rocks due
to crystallisation of primitive magmas generated by partial melting of a vein metasomatised network
within a lithospheric upper mantle source, at low pressure and high PH2O.
The shift to the younger Vico volcano, in which leucite-bearing magmas prevail, is thought to
be due to the arrival in the mantle source of newly formed metasomatic agent from the undergoing
slab characterised by the increasing of a sedimentary carbonate recycled component. This new
component appears in the Middle Pleistocene and it is responsible for the composition of the
magmatism of the Roman region. The recycling of carbonate-bearing pelitic sediments within the
mantle wedge produces a carbonate-rich metasomatic agent. The latter is responsible for
stabilisation of phlogopite-bearing wehrlitic veins within the mantle wedge. Partial melting of this
newly formed vein network under high XCO2 generated silica under-saturated, and then leucitebearing,
ultrapotassic primary melts. A further shift is observed among the Vico post-caldera
magmas, in which the appearance of a deep asthenospheric component is argued to be channelled
late through slab-tear
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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