8,993 research outputs found
Film Music Histories and Ethnographies: New Perspectives on Italian Cinema of the Long 1960s – Guest Editorial
No full textPresentation of the Special Double Issue "Film Music Histories and Ethnographies: New Perspectives on Italian Cinema of the Long 1960s", edited by Alessandro Cecchi and Maurizio Corbella
Mechanics of structure genome applied in the homogenization of masonry reinforced by FRP repointing technique
No full textThis paper presents the newly developed Mechanics of structure genome (MSG) technique as an alternative for homogenizing masonry without reinforcement or reinforced by the FRP repointing technique. In the numerical examples analyzed, the results obtained with MSG were compared to those presented by Barbieri and Cecchi (2007), as well as with the finite element method (FEM). For unreinforced masonry, it is observed that the results obtained with MSG are closer to those of the FEM than those presented by
Barbieri and Cecchi (2007). For the reinforced masonry, three values were considered for the FRP Young’s modulus. The analyses performed show an increase in the tiffness of the reinforced masonry, but the increase in FRP Young’s modulus only showed respective growth in the stiffness of the masonry in the horizontal direction. Finally, it is added that the MSG technique has advantages over the solution of a boundary value problem by the FEM, which is the classic and referential formulation for the masonry homogenization process
Premessa del curatore
No full textPremessa del curatore al volume "La musica fra testo, performance e media. Forme e concetti dell'esperienza musicale" (a cura di Alessandro Cecchi), Roma: NeoClassica 2019 (pubblicato nel giugno 2020)
Interdisciplinary perspectives on musical performance: Historical and recent research
No full textThe authors of this additional e-chapter offer a critical survey of the main approaches to musical performance developed over the last few decades. After a general introduction to the concept of performance, part 1 (by Marco Lutzu) offers a historical overview of the study of musical performance in ethnomusicology in the twentieth and twenty-first centuries. Part 2 (by Alessandro Cecchi) moves from a list of recent international projects on musical performance and goes on to present the "music as performance" paradigm in (historical) musicology, and the approaches of artistic or performance-led research. Part 2 continues by presenting three interdisciplinary research strands: the study of musical performance in and through the media, the perspective of cognitive science and neuroscience, the perspectives of music therapy, music psychology and disability studies
A homogenized Reissner-Mindlin model for orthotropic periodic plates. Application to brickwork panels
No full textAbstractThis paper describes a new procedure for the homogenization of orthotropic 3D periodic plates. The theory of Caillerie [Caillerie, D., 1984. Thin elastic and periodic plates. Math. Method Appl. Sci., 6, 159–191.] – which leads to a homogeneous Love–Kirchhoff model – is extended in order to take into account the shear effects for thick plates. A homogenized Reissner–Mindlin plate model is proposed. Hence, the determination of the shear constants requires the resolution of an auxiliary 3D boundary value problem on the unit cell that generates the periodic plate. This homogenization procedure is then applied to periodic brickwork panels.A Love–Kirchhoff plate model for linear elastic periodic brickwork has been already proposed by Cecchi and Sab [Cecchi, A., Sab, K., 2002b. Out-of-plane model for heterogeneous periodic materials: the case of masonry. Eur. J. Mech. A-Solids 21, 249–268 ; Cecchi, A., Sab, K., 2006. Corrigendum to A comparison between a 3D discrete model and two homogenised plate models for periodic elastic brickwork [Int. J. Solids Struct., vol. 41/9–10, pp. 2259–2276], Int. J. Solids Struct., vol. 43/2, pp. 390–392.]. The identification of a Reissner–Mindlin homogenized plate model for infinitely rigid blocks connected by elastic interfaces (the mortar thin joints) has been also developed by the authors Cecchi and Sab [Cecchi A., Sab K., 2004. A comparison between a 3D discrete model and two homogenised plate models for periodic elastic brickwork. Int. J. Solids Struct. 41/9–10, 2259–2276.]. In that case, the identification between the 3D block discrete model and the 2D plate model is based on an identification at the order 1 in the rigid body displacement and at the order 0 in the rigid body rotation.In the present paper, the new identification procedure is implemented taking into account the shear effect when the blocks are deformable bodies. It is proved that the proposed procedure is consistent with the one already used by the authors for rigid blocks. Besides, an analytical approximation for the homogenized shear constants is derived. A finite elements model is then used to evaluate the exact shear homogenized constants and to compare them with the approximated one. Excellent agreement is found. Finally, a structural experimentation is carried out in the case of masonry panel under cylindrical bending conditions. Here, the full 3D finite elements heterogeneous model is compared to the corresponding 2D Reissner–Mindlin and Love–Kirchhoff plate models so as to study the discrepancy between these three models as a function of the length-to-thickness ratio (slenderness) of the panel. It is shown that the proposed Reissner–Mindlin model best fits with the finite elements model
Limit analysis of masonry domes: the case of Hagia Sophia and Anime Sante
No full textThe conservation of cultural heritage is a challenge for the contemporary society. In recent
decades, significant resources have been allocated for the conservation and restoration of the
architectural heritage. Historical buildings were restored, protected and reinforced with the
intent to limit the risks of degradation, due to phenomena of structural damage and to external
factors such as differential settlements, earthquakes, etc. The wide diffusion of historic masonry
constructions in the Mediterranean basin requires reliable tools for the evaluation of their
structural safety.
Masonry domes represent an important part of the architectural heritage. However domes
haven’t been studied as much as other masonry structures. The collapses happened in recent
years, as a consequence of seismic actions or lack of maintenance, show the need of detailed
studies. Here a limit analysis (Milankovitch, 1907; Heymann, 1969; Livesley, 1992; Milani and
Cecchi, 2013) to the evaluation of the behavior of masonry domes is presented. An algorithm
based on the kinematic approach has been developed to evaluate the minimum collapse
multiplier and to determine the position of the hinges. The proposed method is compared with
some real cases: the collapse of Anime Sante Church in L’Aquila and the analysis developed
on Hagia Sofia in Istanbul. This comparison is useful to tune and validate the proposed method
Progetto di recupero del Carcere di San Vittore a Milano come Museo della storia urbana e dell'architettura della città. Pubblicato in: AAVV, Quaderni del Dipartimento di Progettazione dell'Architettura, n° 16, Edizione CLUP, Milano 1993
No full textProgetto sviluppato nell'ambito delle ricerche svolte sul tema del recupero del costruito, con i prof Raffaello Cecchi e Vincenza Lim
THE FIRST APPLICATION OF THE BRIGGS-RAUSCHER REACTION FOR MEASUREMENT OF ANTIOXIDANT POWER OF ITALIAN MONOCULTIVAR EXTRA VIRGIN OLIVE OIL SAMPLES
No full textThe amount of melanin pigments was investigated in 95 Peruvian alpaca, representative of six different fleece colours, by means of spectrophotometric assays: SpEM (Spectrophotometric Eumelanin), SpPM (Spectrophotometric Pheomelanin), SpASM (Spectrophotometric Alkali Soluble Melanin), and SpTM (Spectrophotometric Total Melanin). It was found that these melanin pigments were suitable for identifying three homogeneous groups, each consisting of two closely related colours. A low, an intermediate, and a high amount of SpASM, SpTM, and SpPM characterize pinkish grey and light reddish brown, brown and reddish brown, dark reddish brown and black fleeces, respectively. SpEM and SpTM provide a further split within this latter group; higher concentrations of these pigments distinguish black fleece from dark reddish brown. © Copyright T. Cecchi et al., 2011
Performance/Media/Documentation... Thinking Beyond Dichotomies: An Interview with Philip Auslander
No full textThe philosophical and general cultural contribution of Philip Auslander’s work to music, media, and the arts considered as performance is the radical, critical, and self-critical questioning of cultural dichotomies that often trap our thoughts exactly when they seem to help us think more clearly. Intervewed by Alessandro Cecchi, Auslander reflects on the exploration of the “continuum” between sound and vision, technique and technology, performance and media, music and the arts considered in their continuously and mutually changing relationships.
Philip Auslander is a Professor of Performance Studies and Popular Musicology in the School of Literature, Media, and Communication of the Georgia Institute of Technology (Atlanta, Georgia, USA). He is the author of numerous scholarly articles and seven books, including Presence and Resistance: Postmodernism and Cultural Politics in Contemporary American Performance (University of Michigan Press, 1992), From Acting to Performance: Essays in Modernism and Postmodernism (Routledge, 1997), Liveness: Performance in a Mediatized Culture (Routledge, 1999; 2nd ed. 2008),Performing Glam Rock: Gender and Theatricality in Popular Music (University of Michigan Press, 2006), Reactivations: Essays on Performance and Its Documentation (University of Michigan Press, 2018), and In Concert: Performing Musical Persona (University of Michigan Press, 2021). In addition to his scholarly work on performance and music, Prof. Auslander has written art criticism for ArtForum and other publications and regularly contributes essays to exhibition catalogs for museums in Europe and North America, including Tate Modern, The Whitney Museum of American Art, the Migros Museum, and the Walker Art Center. He is also a screen actor and writer. “Dr. Blues,” a short film Auslander wrote, produced, and acted in, premiered at the Peachtree Village International Film Festival in Atlanta in October of 2019
Validation of analytical multiparameter homogenization models for out-of-plane loaded masonry walls by means of the finite element method
No full textThe linear elastic analysis of in-plane and out-of-plane loaded masonry walls is still significant under service loads and is required by codes of practice, therefore the knowledge of the homogenized mechanical properties of masonry is of relevant interest. The aim of this paper is to discuss the problem of the out-of-plane loaded masonry walls in detail and to assess the accuracy and reliability of different homogenization approaches presented in the technical literature, with particular interest in recent explicit formulas obtained through an asymptotic model (as reported by Cecchi and Sab in 2002). Several meaningful comparisons are presented for different types of new and historical masonry structures currently employed in Italy. The validation of the analytical models is carried out by means of a three-dimensional (3D) finite-element (FE) out-of-plane homogenization. A final structural comparison among analytical models, FE out-of-plane homogenization, and a computationally expensive heterogeneous 3D FE model is discussed for a simply supported square panel laterally loaded
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