6,129 research outputs found
Molto più di un semplice ronron. La musica nel cinema di Mario Soldati
No full textIn occasione del centenario della nascita di Mario Soldati, Goffredo Fofi ricordava che il regista allora era «tornato di moda» dichiarando che «l’atmosfera un po’ cospirativa con la quale, anni addietro, si parlava di lui, dei suoi libri e film», era giunta al termine. Il processo di valorizzazione a cui recentemente è andata incontro la sua filmografia, allo stesso tempo, rende sempre più urgente un’analoga attenzione alla maniera con cui Soldati utilizzava la musica nelle proprie pellicole. Un’operazione necessaria, considerate le modalità con cui egli pensava al commento sonoro nei propri film e le funzioni di primo piano che di volta in volta assegnava ai compositori che collaboravano al suo fianco nell’allestimento di ogni singola pellicola. L'articolo, dedicato all'analisi della colonna sonora de "Le miserie del signor Travet" (1946), riporta anche alcune dichiarazioni di grande interesse del regista, anche all’interno di "Colonna sonora", un programma televisivo della RAI degli anni Sessanta di Glauco Pellegrini che allora ebbe molto successo segnando un momento di centrale importanza nella storia della musica per film italiana
Audiomobiles, Sculptures and Conundrums
No full textRoberto Gerhard was a pioneer of electronic music in England creating a number of substantial concert, theatre and radio works from as early as 1954. Gerhard’s electronic music is one of the richest repositories for understanding the development of the composer’s late compositional technique. Apart from the Symphony no.3, ‘Collages’, none of Gerhard’s electronic music is published. This paper will discuss aspects of Gerhard’s electronic music, focusing on Audiomobiles (1958-59) and Sculptures (1963)
Morozzo Della Rocca (Roberto) La Fede e la guerra. Cappellani militari e preti soldati (1915-1919)
No full textPoulat Emile. Morozzo Della Rocca (Roberto) La Fede e la guerra. Cappellani militari e preti soldati (1915-1919). In: Archives de sciences sociales des religions, n°56/2, 1983. pp. 285-286
EUCLIDEAN WILSON LOOP AND AXIAL GAUGE
No full textA critical analysis is given in order to set up a well-defined perturbative expansion for Yang-Mills Euclidean theories within the axial gauge choice, using Cauchy principal value prescription to handle the spurious singularities. It is shown that, following a mathematically meaningful and unambiguous procedure, the exponential behavior of the Euclidean Wilson loop does not occur at variance with the covariant and planar gauge choices. A comparison with previous similar approaches and results is worked out in order to clearly understand the reasons for the breakdown of gauge invariance in the present case. In particular we can conclude that the so far proposed alternative prescriptions, which have been claimed to restore gauge invariance, should be carefully reexamined, at least for the Euclidean formulation
The Temporal Gauge Within The Dirac Constrained Dynamics
No full textThe Temporal Gauge Within The Dirac Constrained Dynamic
The Gluon Selfenergy In The Planar Gauge With The Leibbrandt-mandelstam Prescription
No full textWe develop an explicit calculation of the divergent part of the gluon self-energy in the planar gauge with the Leibbrandt-Mandelstam prescription for the spurious poles; the Lee-Ward identity for the self-energy tensor is also checked
Roberto Gerhard’s Sound Compositions: A Historical-Philological Perspective. Archive, Process, Intent and reenactment
No full textThis research advances the current state of knowledge in the field of early tape music both empirically and methodologically. The purpose of this study is to evaluate the impact that the electronic medium exerted in the musical thinking of Roberto Gerhard, one of the most outspoken, prolific and influential composers in the Spanish diaspora whose musical legacy, for the most part unknown, is a major landmark in the early history of electroacoustic music. Gerhard’s personal tape collection, one of the largest historical archives of its kind reported in the literature, is exceptional for both its antiquity (50+-year-old tapes) and its abundance of production materials. Through the digitisation and analysis of the composer’s tape collection this research argues that the empirical study of audio documents sets out a basis for a broader understanding of textual processes. More specifically, the research demonstrates that the reconstruction of works based on magnetic tape sketches is a powerful method to advance the understanding of early tape music. This research also examines Gerhard’s sound compositions in relation to the post-war context in which they were composed. Finally, this research presents performance documentation that proposes an approach to the electroacoustic music repertoire in which creativity is not at odds with rigor and critical discernment demonstrating that archival study can be closely aligned to the concept of re-enactment
Pairs emission in a uniform background field: an algebraic approach
No full textA fully algebraic general approach is developed to treat the pairs emission and absorption in the presence of some uniform external background field. In particular, it is shown that the pairs production and annihilation operators, together with the pairs number operator, do actually fulfill the SU(2) functional Lie algebra. As an example of application, the celebrated Schwinger formula is consistently and nicely recovered, within this novel approach, for a Dirac spinor field in the presence of a constant and homogeneous electric field in four spacetime dimensions
Ekman pumping and intermittent particle resuspension in a stirred tank reactor
No full textLagrangian particle tracking and Direct Numerical Simulation of turbulence are used to highlight an intermittent phenomenon which is relevant for particle resuspension dynamics in an unbaffled tank reactor stirred by an eight blade paddle impeller. This phenomenon is associated with the Ekman pumping effect and its frequency scales in terms of the impeller rotation speed. We examine the dispersion of three swarms of heavy particles of different diameter demonstrating qualitative and quantitative features of the resuspension phenomenon
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