A. González

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Last generation video encoding standards increase computing demands in order to reach the limits on compression efficiency. This is particularly the case of H.264/AVC specification that is gaining interest in industry. We are interested in applying parallel processing to H.264 encoders in order to fulfill the computation requirements imposed by stressing(More)
This paper describes the mechanical devices, the movements and the associated kinematic models of a novel wheelchair prototype capable of climbing staircases. The key feature of the mechanical design is the use of two decoupled mechanisms in each axle, one used to negotiate steps, and the other to position the axle with respect to the chair to accommodate(More)
Escola d’Enginyeria d’Igualada, Universitat Politècnica de Catalunya, Pla de la Massa 8, 08700 Igualada, Spain 3 *Corresponding author. Tel.: +34 938035300; fax: +34 938031589. E-mail address: jordi.riba@eei.upc.edu 4 5 Abstract—Hybrid renewable energy systems (HRES) have been widely identified as an efficient mechanism 6 to generate electrical power based(More)
This paper describes the mechanical devices, the movements and the trajectory generation of a novel wheelchair prototype capable of climbing staircases. The key feature of the mechanical design is the use of two decoupled mechanisms for each axle, one used to negotiate steps, and the other to position the axle with respect to the chair to accommodate the(More)
The UCD community has made this article openly available. Please share how this access benefits you. Your story matters! (@ucd_oa) Some rights reserved. For more information, please see the item record link above. Title A general solution to the identification of moving vehicle forces on a bridge Author(s) González, Arturo; Rowley, C.; O'Brien, Eugene J.(More)
This paper presents a novel approach to the reduction of short-span bridge dynamic responses to heavy vehicle crossing events. The reductions are achieved through adjustment of the vehicle suspension damping coefficient just before the crossing. Given pre-calculations of the response of a vehicle-bridge system to a set of ‘unit’ road disturbances, it is(More)
During the last decade a lot of research and development efforts have been made to design competitive video codecs for several kinds of multimedia applications. Some video encoders like MPEG-4 and H.264 exhibit a very high computational cost, particularly in the case of high quality video sequences. Then, it is very difficult to find software solutions that(More)
Los sistemas tutores inteligentes representan a los sistemas interactivos para el aprendizaje instructivo que han surgido hasta el momento. Los sistemas hipermedia permiten la incorporación de nuevos métodos de aprendizaje, como el constructivo, que hasta ahora habían estado hibernando. La piedra angular de este enfoque reside en la cesión del control al(More)