644 research outputs found
PET Foams Surface Treated with Graphene Nanoplatelets: Evaluation of Thermal Resistance and Flame Retardancy
No full textIn this work, fire-retardant systems consisting of graphene nanoplatelets (GNPs) and dispersant agents were designed and applied on polyethylene terephthalate (PET) foam. Manual deposition from three different liquid solutions was performed in order to create a protective coating on the specimen’s surface. A very low amount of coating, between 1.5 and 3.5 wt%, was chosen for the preparation of coated samples. Flammability, flame penetration, and combustion tests demonstrated the improvement provided to the foam via coating. In particular, specimens with PSS/GNPs coating, compared to neat foam, were able to interrupt the flame during horizontal and vertical flammability tests and led to longer endurance times during the flame penetration test. Furthermore, during cone calorimetry tests, the time to ignition (TTI) increased and the peak of heat release rate (pHRR) was drastically reduced by up to 60% compared to that of the uncoated PET foam. Finally, ageing for 48 and 115 h at 160 °C was performed on coated specimens to evaluate the effect on flammability and combustion behavior. Scanning electron microscopy (SEM) images proved the morphological effect of the heat treatment on the surface, showing that the coating was uniformly distributed. In this case, fire-retardant properties were enhanced, even if fewer GNPs were used
Analysis of the near flatness phenomenon for multi-loop closed manufacturing systems
No full textWith the recent development of the electrical vehicle (EV) industry, the study of manufacturing systems producing key components in this sector is becoming increasingly important. Multi-loop closed manufacturing systems (MCMS), whose operation and control are rarely studied in the literature, are widely used in the EV industry. This work provides innovative guidelines for MCMS operation also valid in a general context and not necessarily limited to the EV field. The main focus is on a specific topic of MCMS operation, namely the near flatness phenomenon. The near flatness indicates how system throughput is influenced by its population, i.e. the number of items circulating in the MCMS, especially in high-throughput conditions. The study of near flatness aims at enhancing MCMS flexibility in terms of population control and handling while guaranteeing high system throughput. In this work, a new indicator quantitatively describing the near flatness is provided. Numerical studies are conducted to analyze the effect of machine efficiency in isolation, mean times to repair and buffer capacities on the near flatness. Experiments are also carried out on a real case of MCMS in the EV field. Based on the experimental results, practical specifications to improve MCMS design and management are provided
Investigation of different types of biochar on the thermal stability and fire retardance of ethylene-vinyl acetate copolymers
No full textIn this work, three biochars, deriving from soft wood, oil seed rape, and rice husk and differing as far as the ash content is considered (2.3, 23.4, and 47.8 wt.%, respectively), were compounded in an ethylene vinyl acetate copolymer (vinyl acetate content: 19 wt.%), using a co-rotating twin-screw extruder; three loadings for each biochar were selected, namely 15, 20, and 40 wt.%. The thermal and mechanical properties were thoroughly investigated, as well as the flame retardance of the resulting compounds. In particular, biochar, irrespective of the type, slowed down the crystallization of the copolymer: this effect increased with increasing the filler loading. Besides, despite a very limited effect in flammability tests, the incorporation of biochar at increasing loadings turned out to enhance the forced-combustion behavior of the compounds, as revealed by the remarkable decrease of peak of heat release rate and of total heat release, notwithstanding a significant increase of the residues at the end of the tests. Finally, increasing the biochar loadings promoted an increase of the stiffness of the resulting compounds, as well as a decrease of their ductility with respect to unfilled ethylene vinyl acetate (EVA), without impacting too much on the overall mechanical behavior of the copolymer. The obtained results seem to indicate that biochar may represent a possible low environmental impact alternative to the already used flame retardants for EVA, providing a good compromise between enhanced fire resistance and acceptable mechanical properties
Conferencia online: El Rol del Terapeuta Físico en la rehabilitación del paciente con COVID-19
No full textEL Lic. Luis Alberto Mondragón Macías, Profesional de Terapia respiratoria por el CONALEP de México y la Lic. Rossmary Haydee Matta Hoyos, Especialista en Fisioterapia del Centro Médico Naval nos imparten sus conocimientos y experiencias sobre los retos del terapeuta físico en el tratamiento a pacientes con COVID-19 durante la pandemia mundial
Diasporic narratives and migrant memories in 'The Teak Almirah' by Indian Jewish author Jael Silliman
No full textDiasporic literature posits itself as a space of vision in which to prompt ruptures, go beyond prescriptive and proscriptive limits, and imagine new ways to identify and belong (Parmar 2016). This is what makes the novels by Jael Silliman worth reading and apprehending in the contested and complex scenario of contemporary Indian literatures in English, further allowing an analysis of the role of English in constructing historically complex communities of readers in a transnational and transcultural perspective. At the crossroads of literature, anthropology and history, Silliman’s novel The Teak Almirah (2016) evokes times and places of colonial India, re-casting them in a new performance where both the characters and the readers are compelled to follow the shadows, the rumours, the hints and the traces that are defined an emotional geography and a “cartography of diaspora” (Brah 1996)
Special issue on Terra Matta
No full textIn 2007 Einaudi published a book entitled Terra matta, by an unknown Sicilian author, Vincenzo Rabito, which would rapidly become a bestseller. In 2012 a film derived from the book, Terramatta; Il Novecento italiano di Vincenzo Rabito analfabeta siciliano, was presented at the Venice Film Festival to great acclaim. In introducing our analyses of that cultural phenomenon, I describe the nature of the typescript and set it in the context of other writings by Italy's diversamente colti. I chart the passage from typescript to book to film and outline the interventions – explored in detail by the protagonists in the contributions that follow – shaping its successive incarnations
«Ogni artista è “sulla” terra per creare un mito»: Roberto Sebastian Matta e l’arte a Roma all’inizio degli anni Cinquanta
No full textRoberto Sebastian Matta lived in Rome between 1949 and 1954, in a very important moment for the renewal of Italian art after the end of World War II. Matta – who had previously played a central role in the surrealist movement during his stays in Paris and New York – actively participated in the cultural life of Rome, where he held numerous solo shows. In Rome, above all, he closely cooperated with some of the most important artists of the time (among them Alberto Burri, Giuseppe Capogrossi and Piero Dorazio). Matta helped spreading the lesson of Surrealism in Italy, urging young Italian artists to carry out technical experimentations and to seek a deeper and stronger relationship with reality
Investigation of Different Types of Biochar on the Thermal Stability and Fire Retardancy of polymer
No full textL'abstract è presente nell'allegato / the abstract is in the attachmen
Gordon Matta‐Clark’s time machines: building cuts under Deleuzian optics (II)
No full text[EN] Gordon Matta‐Clark made a building cuts series that, due to their artistic nature, were able to generate paracinematic “time‐images” (Gilles Deleuze) in real space. The consequences of this fact are that different temporalities occurred simultaneously in the building intervened artistically by Matta‐Clark through his cuts. Past, present and future related to the place intermingled interchangeably waiting for the building cuts visitor to activate or deactivate combining these temporalities with the movement of his body and his optical and sound perceptions. The buildings altered by Matta‐Clark functioned as "time machines" and the few visitors who could experience them were "time travelers."[ES] Gordon Matta-Clark realizó una serie de cortes en edificios (building cuts) que, por su naturaleza artística, eran capaces de generar “imágenes‐tiempo” (Gilles Deleuze) para cinemáticas en el espacio real. Las consecuencias de este hecho estriban en que diferentes temporalidades se presentaban simultáneamente en el edificio intervenido artísticamente por Matta‐Clark a través de sus cortes. Pasado, presente y futuro relativos al lugar se entremezclaban indistintamente a la espera de que el visitante de los building cuts activase o desactivase combinando esas temporalidades con el movimiento de su cuerpo y sus percepciones ópticas y sonoras. Los edificios alterados por Matta‐Clark funcionaban como “máquinas del tiempo” y los escasos visitantes que pudieron experimentarlos, fueron “viajeros a través del tiempo”.Bouille De Vicente, L. (2020). Las máquinas del tiempo de Gordon Matta-Clark: building cuts bajo una óptica deleuziana (II). ANIAV - Revista de Investigación en Artes Visuales. 0(6):3-24. https://doi.org/10.4995/aniav.2020.13007OJS32406Bouille de Vicente, L. (2019). Los "espacios cualesquiera" de Gordon Matta-Clark: building cuts bajo una óptica deleuziana (I). ANIAV ‐ Revista de Investigación en Artes Visuales, 0(4), 68‐90. doi: https://doi.org/10.4995/aniav.2019.11041Collado, E. (2012). Paracinema: la desmaterialización del cine en las prácticas artísticas. Madrid: Trama.Deleuze, G. (1987). La imagen‐tiempo. Barcelona: Paidós.Deleuze, G. (2015). La imagen‐movimiento. Barcelona: Paidós.Deleuze, G. y Guattari, F. (2002). Mil mesetas. Valencia: Pre‐Textos.Diserens, C. (1992). Los años de Greene Street. En Gordon Matta‐Clark (p. 9‐13). Valencia: Institut Valencià d'Art Modern.Diserens, C. (ed.). (2010). Gordon Matta‐Clark. Londres: Phaidon.Doane, M. A. (2008). El instante y el archivo. En Hernández‐Navarro. (comp.). Heterocronías (p. 57‐94). Murcia: CENDEAC.Doane, M. A. (2012). La emergencia del tiempo cinemático. Murcia: CENDEAC.Fernández Mallo, A. (2018). Teoría general de la basura. Barcelona: Galaxia Gutenberg.Flam, J. (ed.). (1996). Robert Smithson: The Collected Writings. Berkeley: University of California Press.García Bacca, J. D. (1990). Nueve grandes filósofos y sus temas. Barcelona: Anthropos.Gordon Matta‐Clark. (1992). Valencia: Institut Valencià d'Art Modern.Hernández‐Navarro, M. A. (2012). Materializar el pasado. Murcia: Micromegas.Hernández‐Navarro, M. A. (comp.). (2008). Heterocronías. Murcia: CENDEAC.Huyssen, A. (2008). La nostalgia por las ruinas. En Hernández‐Navarro. (comp.). Heterocronías (p. 35‐56). Murcia: CENDEAC.Jenkins, B. (2011). Gordon Matta‐Clark: Conical Intersect. Londres: Afterall.Koninsberg, I. (2004). Diccionario técnico de cine. Madrid: Akal.Kubler, G. (1975). La Configuración del Tiempo. Madrid: Alberto Corazón.Lee, P. M. (2001). Object to be destroyed. Cambridge: The MIT Press.Lynch, K. (1975). De qué tiempo es este lugar. Barcelona: Gustavo Gili.Moure, G. (ed.). (2006). Gordon Matta‐Clark. Barcelona: Polígrafa.Muir, P. (2014). Gordon Matta‐Clark's Conical Intersect. Farnham: Ashgate.Osborne, P. (2008). Recepción distraída: tiempo, arte y tecnología. En Hernández‐ Navarro. (comp.). Heterocronías (p. 239‐251). Murcia: CENDEAC.Shapiro, G. (2008). El tiempo y sus superficies: postperiodización. En Hernández‐ Navarro. (comp.). Heterocronías (p. 95‐128). Murcia: CENDEAC.VV. AA. (2016). Contratiempos. Gramáticas de la temporalidad en el arte reciente. Murcia: CENDEAC.Wells, H. G. (1981). La máquina del tiempo. Barcelona: Bruguera.Love Canal. (2019, 18 de Diciembre). Wikipedia, La encyclopedia libre. Fecha de consulta: 10:57, enero 2, 2020, desde https://en.wikipedia.org/w/index.php?title=Love_Canal&oldid=93142328
SCISSION: The Architectural Collage and Gordon Matta-Clark's Circus Caribbean Orange
No full textSCISSIONS: Architecture, Collage-Making and the Fragmented Imagination of Gordon Matta-Clark reconceptualizes cutting as a generative architectural operation. Bridging archival research, material culture studies and critical theory, the dissertation advances three claims. First, purposeful subtraction—breaking, excising, peeling, splitting—has been embedded in architectural practice from spolia and sgraffito to post-digital sampling; it therefore warrants the same analytical status traditionally reserved for additive design. Second, Gordon Matta-Clark's 1971-78 Circus or The Caribbean Orange project 1978 constitute a paradigmatic laboratory in which cutting becomes design, drawing and phenomenological event at once. Third, the operative logic of the cut is best unpacked through its tools: knife (drawing), saw (Building Cuts), scissors (Silver Photo Collage) and scalpel (Photo Strip Collage) Methodologically, each chapter pairs close readings of primary artefacts—blueprints annotated and physically incised by Matta-Clark; Cibachrome photomontages sliced on a light table; film strips re-stitched into chromatic lattices—with anthropological and philosophical lenses (Bachelard's material psychoanalysis, Ingold's "workmanship of risk", Turner's liminality). Technical analyses of cutting implements are interwoven with accounts of their ritual and symbolic afterlives, revealing how blades carry coefficients of valiance, intelligence and social agency. Matta-Clark translated compass-drawn circles on survey plans into full-scale spherical voids, then re-translated those voids into collaged images employing two states of the photograph starting by cutting the silver photo and later on using the —an iterative loop that collapses design, demolition and representation.
By framing cutting as at once destructive and generative, the dissertation contributes to debates on adaptive reuse, non-finito aesthetics and the ethics of architectural intervention. It argues that cuts act as "operational diagrams" that store knowledge for future makers, reframing negative space as an epistemic resource. Ultimately, SCISSION positions collage—not as an artistic supplement to architecture—but as an architectural methodology that integrates built matter and its erasures offering a framework for practice in an era marked by scarcity, maintenance, and repair.Doctor of PhilosophyWhat happens when we treat subtraction—not construction—as architecture's primary act? Moving from myths of scissors-wielding fates to the 1970s building cuts of Chilean-American artist-architect Gordon Matta-Clark, each chapter studies a different blade—knife, saw, scissors, scalpel with the intention to understand how by removing can creates in different layers or meaning, starting by a close reading of the drawing (cutted out and pasted architectural drawing create an architectural space. Historical snapshots range from ancient builders who recycled temple stones to modern artists who sliced photographs, while first-hand archival work follows Matta-Clark as he carves circular voids through a Chicago five-levels townhouse in 1978 that now serves to the Museum of Contemporary Art, Chicago
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