Sviluppo di un sistema di riconoscimento di immagini contenenti volti morphed

La tesi descrive lo sviluppo di un sistema di rilevamento di immagini di volto sottoposte a morphing.

Biomechanics of the rostrum in crocodilians: A comparative analysis using finite-element modeling

This article reports the use of simple beam and finite-element models to investigate the relationship between rostral shape and biomechanical performance in living crocodilians under a range of loading conditions. Load cases corresponded to simple biting, lateral head shaking, and twist feeding behaviors. The six specimens were chosen to reflect, as far as possible, the full range of rostral shape in living crocodilians: a juvenile Caiman crocodilus, subadult Alligator mississippiensis and Crocodylus johnstoni, and adult Caiman crocodilus, Melanosuchus niger, and Paleosuchus palpebrosus. The simple beam models were generated using morphometric landmarks from each specimen. Three of the finite-element models, the A. mississippiensis, juvenile Caiman crocodilus, and the Crocodylus johnstoni, were based on CT scan data from respective specimens, but these data were not available for the other models and so these-the adult Caiman crocodilus, M. niger, and P. palpebrosus-were generated by morphing the juvenile Caiman crocodilus mesh with reference to three-dimensional linear distance measured from specimens. Comparison of the mechanical performance of the six finite-element models essentially matched results of the simple beam models: relatively tall skulls performed best under vertical loading and tall and wide skulls performed best under torsional loading. The widely held assumption that the platyrostral (dorsoventrally flattened) crocodilian skull is optimized for torsional loading was not supported by either simple beam theory models or finite-element modeling. Rather than being purely optimized against loads encountered while subduing and processing food, the shape of the crocodilian rostrum may be significantly affected by the hydrodynamic constraints of catching agile aquatic prey. This observation has important implications for our understanding of biomechanics in crocodilians and other aquatic reptiles.

Constructal Design of Energy Systems

This dissertation shows the use of Constructal law to find the relation between the morphing of the system configuration and the improvements in the global performance of the complex flow system. It shows that the better features of both flow and heat transfer architecture can be found and predicted by using the constructal law in energy systems. Chapter 2 shows the effect of flow configuration on the heat transfer performance of a spiral shaped pipe embedded in a cylindrical conducting volume. Several configurations were considered. The optimal spacings between the spiral turns and spire planes exist, such that the volumetric heat transfer rate is maximal. The optimized features of the heat transfer architecture are robust. Chapter 3 shows the heat transfer performance of a helically shaped pipe embedded in a cylindrical conducting volume. It shows that the optimized features of the heat transfer architecture are robust with respect to changes in several physical parameters. Chapter 4 reports analytically the formulas for effective permeability in several configurations of fissured systems, using the closed-form description of tree networks designed to provide flow access. The permeability formulas do not vary much from one tree design to the next, suggesting that similar formulas may apply to naturally fissured porous media with unknown precise details, which occur in natural reservoirs. Chapter 5 illustrates a counterflow heat exchanger consists of two plenums with a core. The results show that the overall flow and thermal resistance are lowest when the core is absent. Overall, the constructal design governs the evolution of flow configuration in nature and energy systems.

Imágenes recalcitrantes: el caso de la proclamación de Juan Carlos I como rey de España (22 de noviembre de 1975)

En el flujo informativo, algunas imágenes, que calificamos aquí de “recalcitrantes” se resisten a perecer y sobreviven a su contexto de producción. El presente estudio analiza cómo una de ellas, la secuencia televisiva de la proclamación de Juan Carlos como sucesor de Francisco Franco a la jefatura del estado, el 22 de noviembre de 1975, ha sobrevivido, metamorfoseándose hasta hoy en día, de pantallas en pantallas, a través de una muestra representativa de algunas de sus reelaboraciones más significativas.

Digital Figurations : The Human Figure as Cinematic Concept

Mainstream cinema is to an ever-increasing degree deploying digital imaging technologies to work with the human form; expanding on it, morphing its features, or providing new ways of presenting it. This has prompted theories of simulation and virtualisation to explore the cultural and aesthetic implications, anxieties, and possibilities of a loss of the ‘real’ – in turn often defined in terms of the photographic trace. This thesis wants to provide another perspective. Following instead some recent imperatives in art-theory, this study looks to introduce and expand on the notion of the human figure, as pertaining to processes of figuration rather than (only) representation. The notion of the figure and figuration have an extended history in the fields of hermeneutics, aesthetics, and philosophy, through which they have come to stand for particular theories and methodologies with regards to images and their communication of meaning. This objective of this study is to appropriate these for film-theory, culminating in two case-studies to demonstrate how formal parameters present and organise ideas of the body and the human. The aim is to develop a material approach to contemporary digital practices, where bodies have not ceased to matter but are framed in new ways by new technologies.

Negligent Eye

This presentation was both an illustrated lecture and a published paper presented at the IMPACT 9 Conference Printmaking in the Post-Print Age, Hangzhou China 2015. It was an extension of the exhibition catalogue essay for the Bluecoat Gallery Exhibition of the same name. In 2014 I curated an exhibition The Negligent Eye at the Bluecoat Gallery in Liverpool as the result of longstanding interest in scanning and 3D printing and the role of these in changing the field of Print within Fine Art Practice. In the aftermath of curatingshow I have continued to reflect on this material with reference to the writings of Vilém Flusser and Hito Steyerl. The work in the exhibition came from a wide range of artists of all generations most of whom are not explicitly located within Printmaking. Whilst some work did not use any scanning technology at all, a shared fascination with the particular translating device of the systematizing ‘eye’ of a scanning digital video camera, flatbed or medical scanner was expressed by all the work in the show. Through writing this paper I aim to extend my own understanding of questions, which arose from the juxtapositions of work and the production of the accompanying catalogue. The show developed in dialogue with curators Bryan Biggs and Sarah-Jane Parsons of the Bluecoat Gallery who sent a series of questions about scanning to participating artists. In reflecting upon their answers I will extend the discussions begun in the process of this research. A kind of created attention deficit disorder seems to operate on us all today to make and distribute images and information at speed. What value do ways of making which require slow looking or intensive material explorations have in this accelerated system? What model of the world is being constructed by the drive to simulated realities toward ever-greater resolution, so called high definition? How are our perceptions of reality being altered by the world-view presented in the smooth colourful ever morphing simulations that surround us? The limitations of digital technology are often a starting point for artists to reflect on our relationship to real-world fragility. I will be looking at practices where tactility or dimensionality in a form of hard copy engages with these questions using examples from the exhibition. Artists included in the show were: Cory Arcangel, Christiane Baumgartner, Thomas Bewick, Jyll Bradley, Maurice Carlin, Helen Chadwick, Susan Collins, Conroy/Sanderson, Nicky Coutts, Elizabeth Gossling, Beatrice Haines, Juneau Projects, Laura Maloney, Bob Matthews, London Fieldworks (with the participation of Gustav Metzger), Marilène Oliver, Flora Parrott, South Atlantic Souvenirs, Imogen Stidworthy, Jo Stockham, Wolfgang Tillmans, Alessa Tinne, Michael Wegerer, Rachel Whiteread, Jane and Louise Wilson. Scanning, Art, Technology, Copy, Materiality.

A alexitimia na categorização de emoções em expressões faciais dinâmicas

A alexitimia é o termo usado para caracterizar as pessoas com défices no processamento, na compreensão e na descrição de emoções. Definida também como um traço de personalidade multifatorial, a alexitimia tem uma prevalência de 10% na população em geral e está associada a uma menor qualidade de vida. Apesar de este estudo incidir-se numa população saudável, a alexitimia está frequentemente associada a patologias físicas e perturbações mentais. O objetivo deste estudo consistiu em verificar a influência da alexitimia na categorização das expressões faciais emocionais, numa tarefa de apresentação de faces dinâmicas. 87 participantes com diferentes índices de alexitimia completaram uma tarefa que consistia na apresentação de faces dinâmicas cujo o intuito era categorizar as expressões faciais de raiva, nojo e alegria. A precisão das respostas e os níveis de intensidade emocional foram manipulados. Os resultados indicaram que os indivíduos, no geral, identificaram mais precisamente e com menores níveis de intensidade emocional a expressão de alegria comparativamente com as expressões negativas (raiva e nojo). Verificou-se também diferenças significativas entre a alexitimia e as expressões faciais emocionais relativamente à precisão na categorização. Deste modo, foi possível verificar neste estudo, que indivíduos com altos níveis de alexitimia foram significativamente menos precisos na identificação da expressão facial de raiva comparativamente com indivíduos com baixos níveis de alexitimia.

Metodologie per la simulazione fluidodinamica di pompe gerotor

La modellazione di una pompa gerotor può essere svolta mediante l'utilizzo di modelli matematici di tipo numerico. Questo tipo di soluzione prevedere la realizzazione di un dominio fluido discretizzato. In questo lavoro l'analisi è stata effettuata mediante il software STAR-CCM+. Sono state applicate due tecniche per la discretizzazione del dominio, l'Overset ed il Morphing, applicabili in problemi di interazione tra fluido e struttura in movimento. Analizzate le due tecniche, la seconda è stata applicata nello studio del comportamento di una pompa gerotor. I risultati ottenuti hanno portato alla definizione di un secondo modello ottimizzato mediante la variazione della luce di aspirazione.