Search results for "5.02"
showing 10 items of 758 documents
One-Dimensional TiO2-B Crystals Synthesised by Hydrothermal Process and Their Antibacterial Behaviour on Escherichia coli
2016
We have successfully synthesised one-dimensional single crystals of monoclinic phase titanium dioxide nanostructures (TiO2-B), prepared by a hydrothermal process. Morphological characterization was carried out by atomic force and scanning and transmission electron microscopy techniques. In order to study the crystalline structure, samples were calcined at 500°C in an air-filled chamber. X-ray diffraction results indicated that as-prepared samples presented diffraction patterns of hydrate hydrogen titanate and those calcined at 500°C exhibited the TiO2-B and anatase phases, confirmed by Raman spectroscopy. Scanning electron microscopy results showed that the one-dimensional nanostructures ha…
Cambios de usos del suelo durante la segunda mitad del s. XX en la comarca del Camp del Turia
2015
Regular 1-harmonic flow
2017
We consider the 1-harmonic flow of maps from a bounded domain into a submanifold of a Euclidean space, i.e. the gradient flow of the total variation functional restricted to maps taking values in the manifold. We restrict ourselves to Lipschitz initial data. We prove uniqueness and, in the case of a convex domain, local existence of solutions to the flow equations. If the target manifold has non-positive sectional curvature or in the case that the datum is small, solutions are shown to exist globally and to become constant in finite time. We also consider the case where the domain is a compact Riemannian manifold without boundary, solving the homotopy problem for 1-harmonic maps under some …
Recensione di Rossetti, L. Parmenide e Zenone sophoi ad Elea (2020)
2020
Recensione di Rossetti, L. Parmenide e Zenone sophoi ad Elea (2020).
Prediction of surface treatment effects on the tribological performance of tool steels using artificial neural networks
2019
The present paper discussed the development of a reliable and robust artificial neural network (ANN) capable of predicting the tribological performance of three highly alloyed tool steel grades. Experimental results were obtained by performing plane-contact sliding tests under non-lubrication conditions on a pin-on-disk tribometer. The specimens were tested both in untreated state with different hardening levels, and after surface treatment of nitrocarburizing. We concluded that wear maps via ANN modeling were a user-friendly approach for the presentation of wear-related information, since they easily permitted the determination of areas under steady-state wear that were appropriate for use…
A 4K-Input High-Speed Winner-Take-All (WTA) Circuit with Single-Winner Selection for Change-Driven Vision Sensors
2019
Winner-Take-All (WTA) circuits play an important role in applications where a single element must be selected according to its relevance. They have been successfully applied in neural networks and vision sensors. These applications usually require a large number of inputs for the WTA circuit, especially for vision applications where thousands to millions of pixels may compete to be selected. WTA circuits usually exhibit poor response-time scaling with the number of competitors, and most of the current WTA implementations are designed to work with less than 100 inputs. Another problem related to the large number of inputs is the difficulty to select just one winner, since many competitors ma…
Una propuesta de intervención para niños con trastorno del espectro autista a través de la lectura dialógica y la realidad aumentada
2020
Los niños con trastorno del espectro autista (TEA) requieren intervenciones educativas basadas en la evidencia que traten las dificultades en la atención conjunta, la reciprocidad social, la comunicación, las habilidades mentalistas o el funcionamiento ejecutivo, al tiempo que consideren sus fortalezas en el procesamiento visual y su estilo de aprendizaje. Una intervención que reúne estas cualidades es la técnica de la lectura dialógica de cuentos, como sugieren recientes investigaciones con resultados prometedores. Además, su combinación con nuevas tecnologías como la realidad aumentada puede incrementar la motivación de los niños hacia la tarea y favorecer el aprendizaje. En este artículo…
The lie as epistemological principle
2015
La gestión de la existencia pasa por el empleo del mentir como herramienta clave en el uso cotidiano. La “utilidad” que de ello extrae el hombre es de una enorme variedad. Ha sido largo el tiempo en que la mentira ha quedado reducida a un mero problema moral, pero la verdadera cuestión por el mentir estriba en su estatus ontológico. Mentir –más concretamente: mentirse– es un modo de gestionar la peculiar existencia que nos ha sido dada
Introdução à tradução: sobre a formulação do conceito crítico de liberdade e de autonomia da vontade
2012
O que o leitor tera na sequencia e a traducao de uma pequena selecao de reflexoes de Immanuel Kant sobre filosofia moral redigidas, em sua grande maioria, ao longo “decada silenciosa” de 1770. A escolha dos fragmentos, retirados dos volumes XVII, XVIII (Reflexoes sobre Metafisica) e XIX (Reflexoes sobre Filosofia Moral) da edicao da Academia, 1 foi motivada por um interesse interpretativo de fundo: a defesa de uma descontinuidade da filosofia moral kantiana na passagem do periodo pre-critico para o critico. Com isso se sugere que a existencia de uma concepcao critica da liberdade e a formulacao do principio da autonomia da vontade como um principio supremo da moralidade apenas se tornaram p…