197,076 research outputs found
Revivendo o período fascista: o significado das escolhas de Cesare Pavase em Il compagno
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em LiteraturaO fascismo, um dos episodios vividos na peninsula, deixou o medo e a apreensao para a populacao que, por mais de 20 anos, foi submetida ao jugo de Benito Mussolini. No entanto, ainda que com os meios de comunicacao e a publicacao de livros sendo vigiadas pelos orgaos do governo, pode-se dizer que este foi um periodo muito rico nas producoes artisticas, sobretudo, no que diz respeito ao conteudo de cada obra. E exatamente sobre este periodo que o escritor Cesare Pavese, mesmo declarando-se distante da "politica", publica o seu texto mais "politico": o romance Il compagno. A partir da fortuna critica do corpus, buscou-se refletir sobre os posicionamentos de Pavese enquanto cidadao, escritor e intelectual, identificando e analisando as estrategias de escrita que o autor italiano usou em Il compagno. Sendo assim, ao analisar o perfil e o papel intelectual de Pavese foi possivel tambem uma maior compreensao do periodo historico e cultural pelo qual passou a Italia, ja que Pavese retratou em suas obras uma parte da historia da peninsula.Il fascismo, uno dei episodi vissuti nella peninsola, ha lasciato la paura e l'apprensione alla popolazione che, per più di 20 anni, è stata sotto il giogo di Benito Mussolini. Tuttavia, anche se con i mezzi di comunicazione e la pubblicazione di libri essendo sotto la supervisione di agenzie governative, è possibile dire che questo è stato un periodo molto ricco nelle produzioni artistiche, soprattutto, per quanto riguarda il contenuto di ogniopere. È esattamente sul questo periodo che lo scrittore Cesare Pavese, anche se dichiarandosi lontano dalla "politica", pubblica il suo testo più "politico": il romanzo Il compagno. Dalla fortuna critica del corpus, si è cercato di riflettere sui posizionamenti di Pavese come cittadino, scrittore e intellettuale, identificando ed analizzando le strategie di scritta che l'autore italiano ha usato nel Il compagno. Quindi, al analizzare il profilo e il ruolo intellettuale di Pavese è stato possibile anche una maggior comprensione del periodo storico e culturale per il quale ha passato l'Italia, giacchè Pavese ha ritrattato nelle sue opere una parte della storia della penisola
The m-ovoids of W(5,2) and their generalizations
No full textIn this paper we are concerned with m-ovoids of the symplectic polar space W(2n+1,q), q even. In particular we show the existence of an elliptic quadric of PG(2n+1,q) not polarizing to W(2n+1,q) forming a [Formula presented]-ovoid of W(2n+1,q). A further class of (q+1)-ovoids of W(5,q) is exhibited. It arises by gluing together two orbits of a subgroup of PSp(6,q) isomorphic to PSL(2,q2). We also show that the obtained m-ovoids do not fall in any of the examples known so far in the literature. Moreover, a computer classification of the m-ovoids of W(5,2) is acquired. It turns out that W(5,2) has m-ovoids if and only if m=3 and that there are exactly three pairwise non-isomorphic examples. The first example comes from an elliptic quadric Q−(5,2) polarizing to W(5,2), whereas the other two are the 3-ovoids previously mentioned
Mariagrazia Bianchini: un itinerario fra didattica e ricerca
No full textL'articolo si sofferma sul contributo di Mariagrazia Bianchini (già docente nell'Università di Genova) agli studi di diritto romano con esposizione critica delle principali opere della Studiosa e del loro contenuto, prevalentemente rivolto a indagare l'esperienza giuridica del mondo tardoantico
A modular equality for m‐ovoids of elliptic quadrics
No full textAn m-ovoid of a finite polar space P is a set O of points such that every maximal subspace of P contains exactly m points of O. In the case when P is an elliptic quadric Q(-)(2r+ 1, q) of rank r in F-q(2r+2), we prove that an m-ovoid exists only if m satisfies a certain modular equality, which depends on q and r. This condition rules out many of the possible values of r. Previously, only a lower bound on m was known, which we slightly improve as a byproduct of our method. We also obtain a characterization of them-ovoids of Q(-)(7, q) for q = 2 and (m, q) = (4, 3)
Litho-structure of the Oltrepo Pavese, Northern Apennines (Italy)
No full textIn this article we present a detailed litho-structural map of the Oltrepo Pavese, a sector of the
Northern Apennines, Southern Lombardy, Italy. Lithology and geological structures are an
important basis for different disciplines of Earth Sciences. In particular, for the assessment of
earth surface processes such as soil erosion, mass movements, flooding, etc. The Oltrepo
Pavese is characterised by a complex geology and related tectonic settings. In this study, we
conducted a comprehensive lithological mapping approach considering existing geological
maps, and detailed field surveys. The lithotypes have been subdivided into 11 classes based
on the dominant outcropping lithologies. Integrating bibliographic data and a detailed
Digital Terrain Analysis of a high-resolution DTM (5 m) we detected faults, folds and tectonic
lineaments in the study area. The final result is represented by a litho-structural map of the
Oltrepo Pavese-area, consisting in two shape files elaborated in an open source GIS
environment
About the relations between finite strain in non-cubic crystals and the related phenomenological P-V Equation of State
No full textThe notion of scalar strain in minerals is crucial for the formulation of P-V Equations of State (EoS). A scalar strain, , holding for any crystal symmetry has been derived by a rigorous and general approach, and then used to develop the related phenomenological P-V EoS. , which depends on V and the trace of the G*G0 matrix, can be split into two components, M and , where the former takes values close to those of the scalar strain according to Birch. M, providing the main contribution (often larger than 80%) to , is appropriate for the formulation of an EoS as M/V behaves regularly in the limit of an unstrained configuration. The phenomenological EoS based on M shows the same dependence on the elastic parameters (bulk modulus and derivatives versus pressure) of the usual Birch-Murnaghan EoS, and yields comparable results. Slight deviations occur for low symmetry minerals. This work is meant to contribute (i) to shed light on the relationships between scalar strain and related P-V EoS’s, and (ii) to provide a most general EoS which includes, as a particular case, the Birch-Murnaghan model and explains why this latter is reliable for crystal symmetry other than the cubic one, for which it was originally derived
A single crystal neutron diffraction investigation of diopside at 10 K
No full textSingle crystal neutron diffraction data, collected at 10 K on a natural sample of diopside, provided a structure that refined to R 4.5 for 415 independent reflections. The structure refinement showed significant reduction of the M 2 O 3C2 , 3D2 bond lengths, resulting in a more regular M 2 polyhedron than at higher temperatures, A significant zero point contribution to the atomic displacement parameters ADP was found. On average, it accounts for the 35 of the room temperature determination. Such results confirm previous predictions based on lattice dynamics calculations
Physical and optical properties of atmospheric aerosols by in-situ and radiometric measurements
No full textPhysical and optical properties of atmospheric aerosols collected by using a high resolution (1.5 nm) spectroradiometer (spectral range 400–800 nm), a 13-stage Dekati Low Pressure Impactor (size range 30 nm–10 μm), and an AE31 Aethalometer (7 wavelenghts from 370 nm to 950 nm), have been examined in a semi-rural site in Southwest Italy (Tito Scalo, 40°35' N, 15°41' E, 750 m a.s.l.). In particular, daily averaged values of AOD and Ångström turbidity parameters from radiometric data together with mass-size distributions from impactor data and Black Carbon (BC) concentrations have been analyzed from May to October 2008. Furthermore, by inverting direct solar radiances, aerosol columnar number and volume size distributions have been obtained for the same period. The comparison of different observation methods, allowed to verify if, and in what conditions, changes in aerosol properties measured at ground are representative of columnar properties variations. Agreement between columnar and in-situ measurements has been obtained in case of anthropogenic aerosol loading, while in case of Saharan dust intrusions some discrepancies have been found when dust particles were located at high layers in the atmosphere (4–8 km) thus affecting columnar properties more than surface ones. For anthropogenic aerosols, a good correlation has been confirmed through the comparison of fine aerosol fraction contribution as measured by radiometer, impactor and aethalometer, suggesting that, in this case, the particles are more homogeneously distributed over the lower layers of atmosphere and columnar aerosol optical properties are dominated by surface measured component
About the reliability of the Maximum Entropy Method in reconstructing electron density: the case of MgO
No full textThe reliability of the Maximum Entropy Method (MEM) to reconstruct finite temperature electron
density (ED) is here discussed, investigating the
case of periclase (MgO). A theoretical electron
density has been generated by quantum mechanic calculations and folded with a function simulating
atomic thermal motion, in order to produce a eference errorless ED [q(r)REF]. The Fourier coefficients of q(r)REF have been calculated, and
used as “observed” diffraction intensities to
reconstruct via MEM the original ED. The electron density attained by MEM [q(r)MEM] and q(r)REF
have been compared with each other (pixel-by-pixel
nd critical points) to assess the ability of MEM to retrieve EDs, on the basis of a set of observed
tructure factors. We have carried out our study varying the number of observed structure factors
[i.e. sin (q)/l cut-off], the nature of he prior-ensity [uniform density and procrystal-like model]
and the way in which the prior-density is treated during MEM aximization [fixed or free to change]. We observe that (i) it is recommendable to use the
rior-density as a start point only, and allow it
to change during maximization; (ii) the closer
is the prior-density to q(r)REF, the easier one
attains by MEM a orrect ED; (iii) if the prior-density is varied and a sufficient large number
of observed structure factors used, then
MEM tends to yield converging EDs, regardless
of the prior-density chosen as a start point
Powder neutron diffraction study of 2M1 muscovite at room pressure and at 2 GPa
No full textA powder sample of 2M1 muscovite, was studied by time-of-flight neutron diffraction at 1 bar and at 2(± 0.1) GPa. Rietveld refinements of the crystal structure were performed, varying all atomic coordinates in the room-pressure case and only the z coordinates of basal O atoms plus xyz of O and H of the OH group at 2 GPa. In both cases the lattice constants were refined. The unit-cell compression shows deviations from linear elastic behaviour. Inter-layer K-O bonds are compressed along z more than the c lattice constant. The O-H group forms an angle of 85(1)° with c* and establishes three very loose contacts with neighbouring O atoms. This environment does not change appreciably at 2 GPa. -Author
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