981 resultados para MP3 (Norma de codificación perceptual)
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La selección de las muestras de ejemplos que se emplean en la codificación normativa del español está relacionada con las concepciones teóricas que en cada época histórica sirven de base para acometer la reflexión gramatical. La autoridad sobre el uso ha correspondido tradicionalmente en la preceptiva académica a las fuentes literarias, que se han empleado fundamentalmente para ilustrar la pauta normativa tanto en la labor lexicográfica como en la gramatical. La incorporación de nuevas tipologías textuales en la producción académica está vinculada a un cambio en la concepción teórica en la que una lengua ya no es concebida como un bloque monolítico y homogéneo, sino donde la variación lingüística se constituye en rasgo inherente a su misma condición histórica. De ahí que no resulte extraño que en la nómina de textos sea cada vez más frecuente encontrar un amplio corpus conformado por publicaciones periódicas. Esta incorporación de muestras periodísticas en la reciente producción académica, materializada en el Diccionario panhispánico de dudas (2005) y en la Nueva gramática de la lengua española (2009), viene a suplir en cierta medida también el silencio normativo académico ante las dudas y vacilaciones lingüísticas planteadas por los profesionales de los medios de comunicación. Tras el rastreo histórico de la aparición de muestras periodísticas en la ejemplificación normativa académica, se tratará de establecer si se ha producido un cambio en la funcionalidad de estas citas de manera que no sean ya empleadas exclusivamente con la valoración de ejemplaridad idiomática, tal y como se utilizaban fundamentalmente las muestras extraídas de los textos literarios en la labor de codificación tradicional de la Academia, sino también como variantes incorrectas objeto de una crítica más o menos velada hacia determinados usos circunscritos mayoritariamente al discurso periodístico actual.
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[EN]We investigate mechanisms which can endow the computer with the ability of describing a human face by means of computer vision techniques. This is a necessary requirement in order to develop HCI approaches which make the user feel himself/herself perceived. This paper describes our experiences considering gender, race and the presence of moustache and glasses. This is accomplished comparing, on a set of 6000 facial images, two di erent face representation approaches: Principal Components Analysis (PCA) and Gabor lters. The results achieved using a Support Vector Machine (SVM) based classi er are promising and particularly better for the second representation approach.
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[EN]This paper describes in detail a real-time multiple face detection system for video streams. The system adds to the good performance provided by a window shift approach, the combination of different cues available in video streams due to temporal coherence. The results achieved by this combined solution outperform the basic face detector obtaining a 98% success rate for around 27000 images, providing additionally eye detection and a relation between the successive detections in time by means of detection threads.
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Programa de doctorado: Ingeniería de Telecomunicación Avanzada. La fecha de publicación es la fecha de lectura
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This research takes a practice-based approach to exploring perceptual matters that often go unnoticed in the context of everyday lived experience. My approach focuses on the experiential possibilities of knowledge emerging through artistic enquiry, and uses a variety of modes (like textiles, sound, physical computing, programming, video and text) to be conducted and communicated. It examines scholarship in line with the ecological theory of perception, and is particularly informed by neurobiological research on sensory integration as well as by cultural theories that examine the role of sensory appreciation in perception. Different processes contributing to our perceptual experience are examined through the development of a touch-sensitive, sound-generating rug and its application in an experimental context. Participants’ interaction with the rug and its sonic output allows an insight into how they make sense of multisensory information via observation of how they physically respond to it. In creating possibilities for observing the two ends of the perceptual process (sensory input and behavioural output), the rug provides a platform for the study of what is intangible to the observer (perceptual activity) through what can actually be observed (physical activity). My analysis focuses on video recordings of the experimental process and data reports obtained from the software used for the sound generating performance of the rug. Its findings suggest that attentional focus, active exploration, and past experience actively affect the ability to integrate multisensory information and are crucial parameters for the formation of a meaningful percept upon which to act. Although relational to the set experimental conditions and the specificities of the experimental group, these findings are in resonance with current cross-disciplinary discourse on perception, and indicate that art research can be incorporated into the wider arena of neurophysiological and behavioural research to expand its span of resources and methods.
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Load Theory (Lavie, 1995, 2005) states that the level of perceptual load in a task (i.e.,the amount of information involved in processing task-relevant stimuli) determines the efficiency of selective attention. There is evidence that perceptual load affects distractor processing, with increased inattentional blindness under high load. Given that high load can result in individuals failing to report seeing obvious objects, it is conceivable that load may also impair memory for the scene. The current study is the first to assess the effect of perceptual load on eyewitness memory. Across three experiments (two video-based and one in a driving simulator), the effect of perceptual load on eyewitness memory was assessed. The results showed that eyewitnesses were less accurate under high load, in particular for peripheral details. For example, memory for the central character in the video was not affected by load but memory for a witness who passed by the window at the edge of the scene was significantly worse under high load. High load memories were also more open to suggestion, showing increased susceptibility to leading questions. High visual perceptual load also affected recall for auditory information, illustrating a possible cross-modal perceptual load effect on memory accuracy. These results have implications for eyewitness memory researchers and forensic professionals.
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Tesis (Maestría en Docencia). -- Universidad de la Salle. Facultad de Ciencias de la Educación. Maestría en Docencia, 2015
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A elaboração da proposta da presente Norma teve o apoio científico de Anabela Graça e André Coelho.
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A elaboração da proposta da presente Norma teve o apoio científico de Anabela Graça e André Coelho.
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Tesis (Ingeniero(a) en Automaziación).--Universidad de La Salle. Facultad de Ingeniería. Programa de Ingeniería en Automatización, 2014
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Tesis (Ingeniero(a) en Automatización).--Universidad de La Salle. Facultad de Ingeniería. Programa de Ingeniería en Automatización, 2014
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Bogotá (Colombia): Universidad de La Salle. Facultad de Ciencias Administrativas y Contables. Programa de Administración de Empresas
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Bogotá (Colombia): Universidad de La Salle. Facultad de Ciencias Administrativas y Contables. Programa de Administración de Empresas