4,371 research outputs found
Form and Content: The irreconcilable contradiction in the Song-Writing of Ewan MacColl
No full textAn analysis and a discussion of the songwriting of Ewan MacColl, the "architect" of the British folk revival and probably the most outstanding songwriter of the British isles. The essay shows how, MacColl did not limit himself to draw inspiration from the folklore but employed in his songs forms and themes derived from the avant-gardes of the 20th century which, notably the techniques of Soviet cinema and of the Brechtian theatre
An H1-conforming virtual element for Darcy and Brinkman equations
No full textThe focus of this paper is on developing a virtual element method (VEM) for Darcy and Brinkman equations. In [L. Beirão da Veiga, C. Lovadina and G. Vacca, ESAIM Math. Model. Numer. Anal. 51 (2017)], we presented a family of virtual elements for Stokes equations and we defined a new virtual element space of velocities such that the associated discrete kernel is pointwise divergence-free. We use a slightly different virtual element space having two fundamental properties: the [Formula: see text]-projection onto [Formula: see text] is exactly computable on the basis of the degrees of freedom, and the associated discrete kernel is still pointwise divergence-free. The resulting numerical scheme for the Darcy equation has optimal order of convergence and [Formula: see text]-conforming velocity solution. We can apply the same approach to develop a robust virtual element method for the Brinkman equation that is stable for both the Stokes and Darcy limit case. We provide a rigorous error analysis of the method and several numerical tests.</jats:p
The Early Bronze Age III and IVA1 at Tell Mardikh/Ebla and Its Region : Stratigraphic and Ceramic Sequences
No full textThe site of Tell Mardikh, ancient Ebla, in north inner Syria, had three periods of flourishing: in Early Bronze IVA, the age of the State Archives, Early Bronze IVB and Middle Bronze I–II, between ca. 2400 and 1600 BC. The volume by Agnese Vacca explores the phases of formation of this great urban culture between ca. 2750/2700 and 2450 BC (EB III–IVA1) by means of an accurate and in-depth analysis of stratigraphy, architecture, ceramic materials and small finds.
The analysis was carried out in part on the field, but it is also the brilliant result of a painstaking work of study of excavation records and files from the archives of the Ebla Excavation, which allowed the author to collect consistent evidence from individual buildings – like Building G2 and Building G5 – and to relate it with scattered evidence from other sectors of the town, leading to the reconstruction of a coherent picture of pre-Palace G phases. As concerns specifically the ceramic repertory, Vacca, starting with the evidence from Ebla, enlarges her analysis, singling out a specific pottery horizon of the Ebla region, whose relations with other contemporary assemblages in the Northern Levant are presented in detail. The resulting picture from Ebla and its region has been related with the contemporary evidence from the Northern Levant and Upper Mesopotamia and has been framed in the general background of the process of state formation in this very important region of the ancient Near East
Ostuni, Torre dell'Alto, Notes; Altamura (in coll. con V. Pesce Delfino); Ca' Verde, Quinzano, San Bernardino (in coll. con G. Alciati)
No full texthttp://web.uniba.it/progettiricerca/catalogorestifossili
Vorticity-stabilized virtual elements for the Oseen equation
No full textIn this paper, we extend the divergence-free VEM of [L. Beiraõ da Veiga, C. Lovadina and G. Vacca, Virtual elements for the Navier-Stokes problem on polygonal meshes, SIAM J. Numer. Anal. 56 (2018) 1210-1242] to the Oseen problem, including a suitable stabilization procedure that guarantees robustness in the convection-dominated case without disrupting the divergence-free property. The stabilization is inspired from [N. Ahmed, G. R. Barrenechea, E. Burman, J. Guzman, A. Linke and C. Merdon, A pressure-robust discretization of Oseen's equation using stabilization in the vorticity equation, SIAM J. Numer. Anal. 59 (2021) 2746-2774] and includes local SUPG-like terms of the vorticity equation, internal jump terms for the velocity gradients, and an additional VEM stabilization. We derive theoretical convergence results that underline the robustness of the scheme in different regimes, including the convection-dominated case. Furthermore, as in the non-stabilized case, the influence of the pressure on the velocity error is moderate, as it appears only through higher-order terms
Before the royal palace G. The stratigraphic and pottery sequence of the West unit of the central complex: the building G5
No full textThe acknowledgement of the outstanding role of the city of Ebla during the EB IVA period (ca. 2450- 2300 BC) is grounded on the exceptional retrieval of the Royal Palace G complex and its State Archive. The period directly preceding the brilliant urban development of Ebla has been investigated two decades ago, through the excavation of two large-scale structures immediately preceding the construction of Royal Palace G: Building G2, dating from EB 111, and Building G5, assigned to EB IVA1, both lying on the acropolis, directly underneath the Royal Palace G (EB IVA2). A careful analysis of the stratigraphic sequence and the seriation of stratified ceramic materials retrieved in Building G5 at Ebla allow to propose a relative sequence for EB IVA1, addressing the not well-known formative phases of Tell Mardikh/Ebla in the framework of the Early Bronze Age
Presentazione libro di G. Vacca, Il riformismo italiano. Dalla fine della guerra fredda alle sfide future.
No full textPresentazione libro di G. Vacca, Il riformismo italiano. Dalla fine della guerra fredda alle sfide future
- …
