5,805 research outputs found
On the Formulation of Steady-State Initialization Problems in Object-Oriented Models of Closed Thermo-Hydraulic Systems
No full textThe object-oriented formulation of steady-state initialization for models of closed thermo-hydraulic systems yields singular problems; due to system-wide structural issues. The paper proposes how to solve this problem in an object-oriented fashion; by means of an additional component that helps to uniquely determine the initial conditions of the system. A method based on the analysis of the null space of the Jacobian of the initialization problem and on suitable annotations is also proposed to provide the end user with meaningful; high-level; context-relevant diagnostic messages; in case the singular problem arises. This diagnostic method can also be applied to other cases; such as closed systems with constant density fluid and electrical circuits lacking a ground connection
Il figlio del diavolo
No full textSee "Criticism" fileRomanzo di Francesco MastrianiFrancesco Guardian
Umberto Pellecchia, Francesco Zanotelli, La cura e il potere: Sapere globale, saperi antropologici, Firenze, Editpress, 2010, pp. 259 - Anna Casella Paltrinieri, Prendersi cura, Firenze, Ed.it, 2011, pp. 268
No full textBook review of Umberto Pellecchia, Francesco Zanotelli, 2010, La cura e il potere: Sapere globale, saperi antropologici, Firenze, Editpress, pp. 259; Anna Casella Paltrinieri, Prendersi cura, Firenze, Ed.it, 2011, pp. 268.Recensione di Umberto Pellecchia, Francesco Zanotelli, La cura e il potere: Sapere globale, saperi antropologici, Firenze, Editpress, 2010, pp. 259; Anna Casella Paltrinieri, Prendersi cura, Firenze, Ed.it, 2011, pp. 268
Tracing the Neoclassical Casella: Compositional Projects, Models, Ideologies
No full textIn 1913, well before neoclassicism became a historiographical label, Alfredo Casella jotted down in his sketchbook a plan for a ‘Divertimento’, then amended to ‘Concerto (or Serenata) in Italian Style’, for string quartet, winds, guitar and mandolin. On the same page appear orchestral settings of two patriotic poems by D’Annunzio: The Night of Caprera and Ode to Rome. Overshadowed by the atonal experiments of the war years, this long-cherished program only materialized a decade later, as the ‘Return to Order’ convinced Casella that the time was ripe for musical and national revival. This article retraces the lines of continuity between the early ‘modernist turmoil’ and the ‘classicist adjustment’, that coincided with the advent of Fascism. Drawing on unpublished sources from the Casella archive, the discussion explores how the composer negotiated the dialectic between revolution and reaction, European cosmopolitanism and cultural autarchy. To demonstrate the alignment between Casella’s aesthetic-ideological premises and the substance of his musical writing, two string quartet works are considered, both emblematic of his transition toward a ‘clarified style’: the Five Pieces, op. 34 (1920) and the Concerto, op. 40 (1923–24)
Tracing the Neoclassical Casella: Compositional Projects, Models, Ideologies
No full textIn 1913, well before neoclassicism became a historiographical label, Alfredo Casella jotted down in his sketchbook a plan for a ‘Divertimento’, then amended to ‘Concerto (or Serenata) in Italian Style’, for string quartet, winds, guitar and mandolin. On the same page appear orchestral settings of two patriotic poems by D’Annunzio: The Night of Caprera and Ode to Rome. Overshadowed by the atonal experiments of the war years, this long-cherished program only materialized a decade later, as the ‘Return to Order’ convinced Casella that the time was ripe for musical and national revival. This article retraces the lines of continuity between the early ‘modernist turmoil’ and the ‘classicist adjustment’, that coincided with the advent of Fascism. Drawing on unpublished sources from the Casella archive, the discussion explores how the composer negotiated the dialectic between revolution and reaction, European cosmopolitanism and cultural autarchy. To demonstrate the alignment between Casella’s aesthetic-ideological premises and the substance of his musical writing, two string quartet works are considered, both emblematic of his transition toward a ‘clarified style’: the Five Pieces, op. 34 (1920) and the Concerto, op. 40 (1923–24)
A Strategy for Parallel Simulation of Declarative Object-Oriented Models of Generalized Physical Networks
No full textFor several years now, most of the growth of comput-
ing power has been made possible by exploiting paral-
lel CPUs on the same chip; unfortunately, state-of-the-art
software tools for the simulation of declarative, object-
oriented models still generate single-threaded simulation
code, showing an increasingly disappointing performance.
This paper presents a simple strategy for the efficient com-
putation of the right-hand-side of the ordinary differen-
tial equations resulting from the causalization of object-
oriented models, which is often the computational bottle-
neck of the executable simulation code. It is shown how
this strategy can be particularly effective in the case of gen-
eralized physical networks, i.e., system models built by the
connection of components storing certain quantities and of
components describing the flow of such quantities between
them
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