826 research outputs found
Crustal Magmatic System Evolution: Anatomy, Architecture, and Physico‐Chemical Processes
No full textErratum: Lack of immunity against rubella among Italian young adults. [BMC Infect Dis., 17, (2017) (199)] Doi: 10.1186/s12879-017-2295-y
No full textAfter publication of this article [1], the authors noted that the given names and family names of all authors had been inverted, and are therefore incorrect in the original article. In the original article, the author names appear as the following: Gallone Maria Serena, Gallone Maria Filomena, Larocca Angela Maria Vittoria, Germinario Cinzia and Tafuri Silvio. However, this is incorrect, and the author names should appear as per the below: Maria Serena Gallone, Maria Filomena Gallone, Angela Maria Vittoria Larocca, Cinzia Germinario, Silvio Tafuri. The author names have been corrected in the author list and the citation for this Erratum
Silvio Spaventa Filippi
No full textThe headword explains the biography and the contribution of the author Silvio Spaventa Filippi to the children's literatur
Geothermobarometry of mafic and ultramafic xenoliths: examples from Hualalai and Mauna Kea volcanoes, Hawaii
No full textXenoliths of plutonic rocks sporadically torn off by erupting magmas are known to carry valuable information about volcano plumbing systems and the lithosphere in which they emplace. One of the main steps to interpret such information is to quantify the pressure and temperature conditions at which the xenolith mineral assemblages last equilibrated. This chapter discusses some aspects of geothermobarometry of mafic and ultramafic rocks using the xenolith populations of Hualalai and Mauna Kea volcanoes, Hawaii, as case studies. Multiple- reaction geobarometry, recently revisited for olivine + clinopyroxene + plagioclase spinel assemblages, provides the most precise pressure estimates (uncertainties as low as 1.0 kbar). An example is shown that integrates these estimates with calculated seismic velocities of the xenoliths and the available data from seismic tomography. The results allow to better constrain some km-scale horizontal and vertical heterogeneities in the magmatic system beneath Hawaii. Ultramafic xenoliths at Hualalai are the residuals of magma crystallization at 16–21 km depth, below the pre-Hawaiian oceanic crust. Few available gabbronorites and diorites record instead lower pressures and likely represent conduits or small magma reservoir crystallized at 0–8 km depth. At Mauna Kea, on the other hand, a significant portion of the xenolith record is composed by olivine-gabbros, which crystallized almost over the entire crustal thickness (3– 18 km). Ultramafic xenoliths are less abundant and might represent the bottom of the same magma reservoirs that crystallized in the deeper portion of the magmatic systems (11–18 km). Some unresolved issues remain in geothermometry of mafic and ultramafic rocks representing portions of magma reservoirs that cooled and recrystallized under subsolidus conditions. This suggests that further experimental and theoretical work is needed to better constrain the thermodynamics and kinetics of peridotitic and basaltic systems at low (< 1000 ̊C) temperatures
Ammirazione o rivalità? Silvio Pellico nei “Mémoires d’outre-tombe”
No full textIn certain chapters of his Mémoires d’outre-tombe, François-René de Chateaubriand extensively refers to Le mie prigioni by Silvio Pellico, where the author recounts his fate as a political prisoner under the Habsburg Empire. While undoubtedly testifying the Chateaubriand admiration for Pellico, these references also reveal an attempt to identify himself with the Italian writer and even to appropriate one of his characters
Low-income workers’ financial participation in Italy: a proposal de iure condendo
No full textFollowing the acknowledgment of empirical evidence supporting the implementation of financial participation among all classes of workers, the Author assesses the Italian context and concludes that such systems have been poorly implemented, especially among low-income workers. By looking at the experience of other EU countries and taking into account the recommendations provided by the European Commission, the Author then argues for the implementation of a regulated dialogue between workers, employers and trade unions. The aim of such dialogue would be to boost the development of financial participation systems among low-income workers without endangering their income
Ammirazione o rivalità? Silvio Pellico nei “Mémoires d’outre-tombe”
No full textIn alcuni capitoli dei Mémoires d’outre-tombe, François-René de Chateaubriand cita abbondantemente Le mie prigioni di Silvio Pellico, dove l’autore racconta il suo destino di prigioniero politico sotto l’impero absburgico. Se testimoniano indubbiamente della sua ammirazione per Pellico, queste citazioni rivelano anche un tentativo di identificarsi allo scrittore piemontese e addirittura di appropriarsi di uno dei suoi personaggi.In certain chapters of his Mémoires d’outre-tombe, François-René de Chateaubriand extensively refers to Le mie prigioni by Silvio Pellico, where the author recounts his fate as a political prisoner under the Habsburg Empire. While undoubtedly testifying the Chateaubriand admiration for Pellico, these references also reveal an attempt to identify himself with the Italian writer and even to appropriate one of his characters
As ideias de Silvio Elia sobre a língua do Brasil
No full textThe author presents Silvio Elias\u27s ideas about the Portuguese language spoken in Brazil whose start point has rested on some of the basic works of this famous Brazilian philologist.O Autor apresenta neste trabalho as ideias de Sílvio Elia sobre a língua portuguesa falada no Brasil, a partir de quatro obras daquele grande filólogo patrício. 
Enea Silvio Piccolomini e le epistole del cardinalato. Alcune considerazioni
No full textNel dialogo epistolare si formavano, si consolidavano e trovavano fondamento le idee che muovevano tutto l’operato di Enea Silvio Piccolomini; la sua corrispondenza era anche una sorta di incubatrice di altre opere. Le lettere del cardinalato, nonostante l’importanza che l’autore attribuiva loro, non furono sistemate da Enea Silvio. Le raccolte manoscritte e a stampa delle quali disponiamo sono il frutto del lavoro ordinatorio dei parenti che agirono con lo scopo di tutelare la memoria del loro protettore. Una edizione critica della corrispondenza dovrebbe quindi unire alle missive che ci sono note tramite le raccolte quelle rimaste inedite in archivi e biblioteche.The letters of Piccolomini were the place in which the ideas, that moved all his activities, formed they self in the epistolary dialogue; Enea’s correspondence was also a kind of incubator for other works. The correspondence of the cardinalate, despite the importance that the author gave to that, was not edited by Enea Silvio self. The manuscript and printed collections at our disposal are the result of the work of the relatives who acted in order to protect the memory of their patron. A critical edition of the correspondence should therefore integrate the letters known through the collections with those that remained unpublished in archives and libraries
Relative formal topology, namely, the binary positivity predicate comes first
No full textIn this paper we introduce relative formal topology in order to deal constructively with
the closed subsets of a topological space as well as with the open ones.
In fact, within standard formal topology the cover relation allows for the definition of the
formal opens, namely, what is supposed to be the formal counterpart of the open
subsets, and within balanced formal topology the binary positivity predicate allows
for the definition of the formal closed subsets, namely, what is supposed to be the
formal counterpart of the closed subsets.
However, these approaches are fully satisfactory (according to the criterion introduced
by the author in "The problem of the formalization of constructive topology", Archive for Mathematical Logic (44/1), pp.115--129) only if an adequate formalization of the
cover relation and the positivity predicate can be provided.
But the present formalizations fail in this respect since some intuitionistically valid
relations between the open and the closed subsets of a concrete topological space
can not be expressed.
Our central result is that a generalization of the standard cover relation together with
a binary positivity predicate enjoying the positivity axiom solve the problem
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