Search results for "ICAC"
showing 10 items of 3727 documents
Su alcuni aspetti di vegetazione relitta nella Valle dell’Oreto (Palermo) e l’opportunità di una loro tutela finalizzata anche al recupero del paesag…
2006
Fast Channel Estimation in the Transformed Spatial Domain for Analog Millimeter Wave Systems
2021
Fast channel estimation in millimeter-wave (mmWave) systems is a fundamental enabler of high-gain beamforming, which boosts coverage and capacity. The channel estimation stage typically involves an initial beam training process where a subset of the possible beam directions at the transmitter and receiver is scanned along a predefined codebook. Unfortunately, the high number of transmit and receive antennas deployed in mmWave systems increase the complexity of the beam selection and channel estimation tasks. In this work, we tackle the channel estimation problem in analog systems from a different perspective than used by previous works. In particular, we propose to move the channel estimati…
Periodic time-domain modulation for the electrically tunable control of optical pulse train envelope and repetition rate multiplication
2012
An electrically tunable system for the control of optical pulse sequences is proposed and demonstrated. It is based on the use of an electrooptic modulator for periodic phase modulation followed by a dispersive device to obtain the temporal Talbot effect. The proposed configuration allows for repetition rate multiplication with different multiplication factors and with the simultaneous control of the pulse train envelope by simply changing the electrical signal driving the modulator. Simulated and experimental results for an input optical pulse train of 10 GHz are shown for different multiplication factors and envelope shapes. © 2006 IEEE.
Route diversity analyses for free-space optical wireless links within turbulent scenarios
2013
Free-Space Optical (FSO) communications link performance is highly affected when propagating through the time-spatially variable turbulent environment. In order to improve signal reception, several mitigation techniques have been proposed and analytically investigated. This paper presents experimental results for the route diversity technique evaluations for a specific case when several diversity links intersects a common turbulent area and concurrently each passing regions with different turbulence flows.
On the performance of multi-GPU-based expert systems for acoustic localization involving massive microphone arrays
2015
Sound source localization is an important topic in expert systems involving microphone arrays, such as automatic camera steering systems, human-machine interaction, video gaming or audio surveillance. The Steered Response Power with Phase Transform (SRP-PHAT) algorithm is a well-known approach for sound source localization due to its robust performance in noisy and reverberant environments. This algorithm analyzes the sound power captured by an acoustic beamformer on a defined spatial grid, estimating the source location as the point that maximizes the output power. Since localization accuracy can be improved by using high-resolution spatial grids and a high number of microphones, accurate …
Support Vector Machines Framework for Linear Signal Processing
2005
This paper presents a support vector machines (SVM) framework to deal with linear signal processing (LSP) problems. The approach relies on three basic steps for model building: (1) identifying the suitable base of the Hilbert signal space in the model, (2) using a robust cost function, and (3) minimizing a constrained, regularized functional by means of the method of Lagrange multipliers. Recently, autoregressive moving average (ARMA) system identification and non-parametric spectral analysis have been formulated under this framework. The generalized, yet simple, formulation of SVM LSP problems is particularized here for three different issues: parametric spectral estimation, stability of I…
La construcció del significat en l'obra d'Olivier Messiaen: «Saint François d'Assise», música de l'invisible
2014
El color, el so, el ritme, els ocells i la fe catòlica, són nocions d’una importància manifesta en el pensament musical del compositor francès Olivier Messiaen. Aquesta memòria se centra en l’estudi de la significació de la seva obra. El Saint François d’Assise representa la culminació de l’art musical de Messiaen. Malgrat la forma fragmentària de l’obra, la substància fonamental d’aquesta òpera no es troba en la narració de les diverses escenes de la vida del sant, sinó en l’articulació precisa dels significats que palesen el seu ascens espiritual devers la gràcia i la santedat. A través de l’anàlisi del discurs que trobem en l’aparell textual de l’obra, constituït pel llibret, i de l’anàl…
Redefinición y simplificación de procedimientos como requisito para la aplicación de medios electrónicos en la administración universitaria
2012
La Ley 11/2007, de 22 de junio, de Acceso Electrónico de los Ciudadanos a los Servicios Públicos supuso una revolución en las estructuras que conforman nuestras Administraciones Públicas, provocando una avalancha de reformas y actuaciones encaminadas a hacer realidad la administración electrónica. Este proceso de reformas también se ha producido en el seno de las universidades públicas. No hay que olvidar que están sujetas al régimen jurídico administrativo en general y al régimen jurídico del procedimiento administrativo electrónico en particular. El trabajo de fin de máster recoge, en primer lugar, el análisis del régimen jurídico del procedimiento administrativo electrónico en el ámbito …
Study design of Heart failure Events reduction with Remote Monitoring and eHealth Support (HERMeS)
2020
Aims: The role of non‐invasive telemedicine (TM) combining telemonitoring and teleintervention by videoconference (VC) in patients recently admitted due to heart failure (HF) (‘vulnerable phase’ HF patients) is not well established. The aim of the Heart failure Events reduction with Remote Monitoring and eHealth Support (HERMeS) trial is to assess the impact on clinical outcomes of implementing a TM service based on mobile health (mHealth), which includes remote daily monitoring of biometric data and symptom reporting (telemonitoring) combined with VC structured, nurse‐based follow‐up (teleintervention). The results will be compared with those of the comprehensive HF usual care (UC) strateg…
El impacto de las nuevas tecnologías de la información y de la comunicación en el sistema escolar
2004
Una de las finalidades de la escuela como institución es insertar a los alumnos, niños y adolescentes por lo general, en la cultura desarrollada en un contexto social y económico más diverso. Los centros escolares reciben numerosos estímulos para aceptar las reglas impuestas por los grupos hegemónicos en el sistema de reproducción social. Por ello la incorporación de las nuevas tecnologías representa, como en su momento fue la imprenta y los medios audiovisuales, una oportunidad para difundir el conocimiento entre un mayor número de ciudadanos, pero -al mismo tiempo- supone un riesgo de una asimilación cultural mecánica, poco crítica y que forme más a clientes que a ciudadanos.