Jorge Hernando

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Diamond exhibits several special properties, for example good biocompatibility and a large electrochemical potential window, that make it particularly suitable for biofunctionalization and biosensing. Here we show that proteins can be attached covalently to nanocrystalline diamond thin films. Moreover, we show that, although the biomolecules are immobilized(More)
Segre is a rule-based automatic phonetic transcription system for Catalan, jointly developed by the Universitat Politècnica de Catalunya, the Universitat Autònoma de Barcelona and the Universitat de Barcelona in the framework of the Catalan Reference Centre for Language Engineering (CREL, Centre de Referència en Enginyeria Lingüística). The syntax of the(More)
Horseradish peroxidase (HRP) has been immobilized on the surface of functionalized nanocrystalline diamond (NCD) thin films. The structure of the modified NCD surface as well as the electrochemical behavior of the whole system was characterized by impedance spectroscopy and cyclic voltammetry. The proximity of HRP heme groups to the NCD surface allowed(More)
This paper extends our previous work on the selective excitation of mechanical vibration modes in MEMS devices using Pulsed Digital Oscillators. It begins by presenting extensive simulation results using the set of iterative maps that model the system and showing that it is possible to activate two or three spatial modes (resonances) of the mechanical(More)
Speech is dramatically degraded when a distant microphone is used in real environments. One of the possible solutions is to use a microphone array to improve the quality of the recorded speech signal. In this paper we present a robust beamformer that integrates the directional noise reduction capability of a modification of the generalized sidelobe(More)
The arrangement of atoms at the surface of a solid accounts for many of its properties: Hardness, chemical activity, corrosion, etc. are dictated by the precise surface structure. Hence, finding it, has a broad range of technical and industrial applications. The ability to solve this problem opens the possibility of designing by computer materials with(More)
Tracking speakers in multiparty conversations constitutes a fundamental task for automatic meeting analysis. In this work, we present the Person Tracking systems developed at UPC for audio, video and audio-video modalities. The proposed systems are designed to deal robustly in both single and multiperson localization task independently on the environmental(More)
The performance of existing speech recognition systems degrades rapidly in the presence of background noise when training and testing cannot be done under the same ambient conditions. The aim of this paper is to report the application of several robust techniques on a system based on the HMM (Hidden Markov Models) and VQ (Vector Quantization) approaches for(More)
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