170,919 research outputs found
An FPGA-based instrument for the estimation of R, L, and C parameters under nonsinusoidal conditions
No full textIt is well know that the most of today electric and electronic devices frequently work with non sinusoidal waveforms, then, all the passive R, L, and C component, sited in these circuits, are involved with non sinusoidal stimuli. Because of its intrinsic non-linearity, real resistors, inductors, capacitors and so on show behaviors very different from those expected in sinusoidal environment. Consequently, a problem of reliable assessment of these components in presence of non sinusoidal environments arises. This problem is even more critical in applications such as the creation of hybrid filters, control circuits based on patterns of sensing elements, circuits of digital protection in power systems, where the design and control of electrical and electronic circuits depend on the correct modeling of the R, L and C components. In previous researches authors proposed a suitable measurement method for the estimation of R, L and C parameters of passive components in non sinusoidal conditions. This paper deals with the realization of a FPGA-based measurement instrument able to continuously update the estimated values of the considered components. The instrument realization passes through an optimized implementation of the previous-proposed measurement method aimed in minimizing the hardware resources and the computational burden, and increase the measurement rate. After a preliminary tuning of the measurement method, carried out in simulation environment, the hardware and the software architectures of the realized measurement instruments together with the measurement strategy are described, and experimentally characterize
d.verse. Primo Festival Internazionale del Teatro per le Diverse Abilità
No full textNell’ambito delle manifestazioni per Genova 2004 Capitale Europea della Cultura, si è svolto a Genova, fra il 4 ottobre e il 26 novembre 2004, "d.verse. Primo Festival Internazionale del Teatro per le Diverse Abilità" organizzato dal Centro Studi per l’integrazione lavorativa dei disabili della ASL 3 “Genovese” in collaborazione con l’associazione culturale “la Milonga” e il Laboratorio Teatrale Integrato Tuttinscena, con il sostegno della Provincia di Genova e della Regione Liguria, il patrocinio dell'Università degli Studi di Genova, e la collaborazione di otto teatri genovesi. Responsabile: Maria Paola Ferrigno; Progettazione artistica: Cristina Valenti; Coordinamento artistico: Sandro Baldacci. In conclusione, il convegno "D.verse Abilità e Teatro", occasione che ha consentito a studiosi, attori, registi e scrittori di interrogarsi sulle nuove frontiere del teatro come strumento di integrazione e sul peculiare apporto che artisti “diversamente abili” possono dare alla rappresentazione artistica. Il cartellone ha ospitato alcune fra le più importanti compagnie di teatro integrato, e di compagnie composte da attori disabili, che operano in Italia e in Europa. Il Festival si è aperto con il musical “l’Anima Buona del Pianeta Sezuan” del Laboratorio Tuttinscena: trenta ragazzi, di cui una buona parte portatori di handicap, provenienti da dieci scuole genovesi, per la regia di M. Pirovano e M. Bonomi. A seguire: “Microphobia” e “The Human Suite”, due coreografie della CandoCo Dance Company di Londra, una compagnia di danza contemporanea formata da danzatori disabili e normodotati, leader nella formazione e nell’educazione alla danza integrata; “La Sirena di Rodari” del Laboratorio Teatrale Integrato Piero Gabrielli di Roma, per la regia di R. Gandini: tredici “ex” del laboratorio in uno spettacolo che ha dato vita alla prima Compagnia Italiana Integrata di Teatro Ragazzi; “Esopo Opera Rock”, musical per la regia di S. Baldacci, frutto di un laboratorio integrato che ha coinvolto i centri diurni della Città di Imperia, il DAMS di Genova e operatori socio sanitari; “No Exit”, regia di A. Viganò, della compagnia francese Oiseau Mouche, finanziata dallo stato e composta da attori professionisti portatori di handicap; “Ritratti” di Lenz Rifrazioni di Parma per la regia di M.F. Maestri: cinque ritratti del mito occidentale resi con eccezionale forza rappresentativa delle attrici diversamente abili ; “Filottete H” di Maccabeteatro per la regia di E. Toma: ispirato a Sofocle, lo spettacolo, con attori portatori di handicap, tratteggia la difficoltà di accettare l’idea di non essere perfetti.
A conclusione del ciclo di rappresentazioni, il convegno dal titolo "D.verse Abilità e Teatro". Interventi di E. Buonaccorsi (Università di Genova ), M.P. Ferrigno (Centro Studi della ASL 3 “Genovese”), G. Oliva (Università Cattolica di Milano), C. Valenti (Università di Bologna), A. Celestini (attore e regista), R. Frati (Teatro dell’Oppresso di Parigi), T. Scarpa (scrittore), D. Segre (regista). In chiusura: “A proposito di sentimenti”, mediometraggio di D. Segre. Il Festival si è concluso con la performance “Emplacement Reservé”, che Rui Frati ha rappresentato con i suoi attori e con il coinvolgimento diretto del pubblico presente. Le disavventure di una madre “speciale” a causa delle circostanze che coinvolgono sua figlia disabile. Un modo dinamico e vitale affinché il dibattito e l’atto teatrale siano un unico corpo
Real-Time Measurement of Time Variant R, L and C Components in Non Sinusoidal Conditions
No full textThe authors are involved in realizing an innovative measurement instrument for the real-time estimation of Resistance (R), Inductance (L) and Capacitance (C) parameters that models real electrical passive components in non sinusoidal environment. This instrument aims to cover the lack of reference instruments and measurement methods for the assessment of electrical passive components in non sinusoidal conditions. In previous papers the authors proposed a measured method implemented in a FPGA platform. In this paper a further step is proposed optimizing the dynamic behavior of the instrument with respect to fast time-variant passive components. The novelty manly consists on the improved signal processing procedure that implements a “forgetting factor” to promptly respond to changes on monitored devices. A full characterization aiming in find a forgetting factor value able to find the best compromise between accuracy and response time together with tests executed on real signals were also reported
Real-time Estimation of R, L, and C Parameters Under non Sinusoidal Conditions: A proposal
No full textModern electric and electronic devices frequently work with non sinusoidal waveforms, then, all the passive R, L, and C components present in these circuits are involved with non sinusoidal stimuli. Consequently, the behaviors of these components in presence of non sinusoidal environments have to be estimated. In previous researches authors proposed a suitable measurement method for the estimation of R, L and C parameters of passive components in non sinusoidal conditions. This paper deals with the realization of a real-time FPGA-based instrument, able to continuously update the estimated values of the considered components. Core of the realized instrument is the digital signal processing section that applies the previously proposed measurement method, based on a parameter estimation technique. This last can be implemented is a sequential (i.e. point by point) algorithm, suitable for the development on a FPGA platform. This implementation allows minimizing both required memory and computational burden. After a preliminary tuning of the measurement method, both the hardware and the software architectures of the realized measurement instrument are described. Experimental tests carried out in a suitable emulation environment and experiments on real R, L and C passive components are carried out in order to characterize the instrumen
A Study on the Feasibility and Effectiveness of Digital Filter Approach for Power Quality Monitoring in Compliance with IEC 61000-4-7
No full textChest wall and lung volume estimation by optical reflectance motion analysis.
No full text Cala, S. J., C. M. Kenyon, G. Ferrigno, P. Carnevali, A. Aliverti, A. Pedotti, P. T. Macklem, and D. F. Rochester. Chest wall and lung volume estimation by optical reflectance motion analysis. J. Appl. Physiol. 81(6): 2680–2689, 1996.—Estimation of chest wall motion by surface measurements only allows one-dimensional measurements of the chest wall. We have assessed an optical reflectance system (OR), which tracks reflective markers in three dimensions (3-D) for respiratory use. We used 86 (6-mm-diameter) hemispherical reflective markers arranged circumferentially on the chest wall in seven rows between the sternal notch and the anterior superior iliac crest in two normal standing subjects. We calculated the volume of the entire chest wall and compared inspired and expired volumes with volumes obtained by spirometry. Marker positions were recorded by four TV cameras; two were 4 m in front of and two were 4 m behind the subject. The TV signals were sampled at 100 Hz and combined with grid calibration parameters on a personal computer to obtain the 3-D coordinates of the markers. Chest wall surfaces were reconstructed by triangulation through the point data, and chest wall volume was calculated. During tidal breathing and vital capacity maneuvers and during CO2-stimulated hyperpnea, there was a very close correlation of the lung volumes (Vl) estimated by spirometry [Vl(SP)] and OR [Vl(OR)]. Regression equations of Vl(OR) ( y) vs. Vl(SP) ( x,btps in liters) for the two subjects were given by y = 1.01 x − 0.01 ( r = 0.996) and y = 0.96 x + 0.03 ( r = 0.997), and by y = 1.04 x + 0.25 ( r = 0.97) and y = 0.98 x + 0.14 ( r = 0.95) for the two maneuvers, respectively. We conclude spirometric volumes can be estimated very accurately and directly from chest wall surface markers, and we speculate that OR may be usefully applied to calculations of chest wall shape, regional volumes, and motion analysis. </jats:p
Measurement of Passive R, L, and C Components Under Nonsinusoidal Conditions: The Solution of Some Case Studies
No full textThis paper deals with the measurement of the R, L, and C parameters of passive components in nonsinusoidal conditions. Since these components usually work with voltage and current waveforms that are different from sinusoidal ones, nonsinusoidal characterization has to be made. The importance of nonsinusoidal characterization of passive components is highlighted through the analysis of two case studies: (1) the influence of distorted waveforms on the line impedance stabilizer network (LISN) passive component behaviors and (2) the influence of voltage and current harmonics on hybrid filter responses. In this paper, the authors propose and describe a measurement method based on linear system identification and model parameter estimation techniques. Then, the two case studies are analyzed and described with the help of some test results
INTEGRAL detection of renewed activity from BHC IGR J17091-3624: Developing towards a state transition?
No full textAuthors: Rodriguez (CEA, F), C. Ferrigno (ISDC, CH), T. Bouchet (CEA/AIM, F), F. Cangemi (APC, F), V. Grinberg (ESA, NL), P. Laurent (CEA/AIM, F), K. Pottschmidt (CRESST/NASA/UMBC, USA), P. Thalhammer (Remeis Observatory, D), J. Wilms (Remeis Observatory, D)https://www.astronomerstelegram.org/?read=1703
Misura in Tempo Reale e Regime non Sinusoidale di Parametri R, L, C Tempo Varianti
No full textGli Autori, in passato, hanno proposto un metodo di misura basato su tecniche di stima parametrica. In questo lavoro si propone una implementazione del metodo di misura precedentemente proposto, volta ad ottimizzare le capacità del metodo nell'inseguire il comportamento tempo-variante dei componenti sotto test
Misura di componenti passivi R, L, C in regime non sinusoidale: soluzione di alcuni casi studio
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