MAV 2010. Materiali di antropologia visiva

Nel 2010 cade il ventennale dalla scomparsa di Diego Carpitella, fondatore dell’Etnomusicologia italiana e tra i primi fautori e promotori dell’Antropologia visiva in Italia. L’intensa attività scientifica da lui dedicata a quest’ultimo ambito di studio non è facilmente riassumibile; per darne sinteticamente conto basti qui ricordare le innumerevoli occasioni di incontro da lui promosse sotto l’auspicio dell’Associazione Italiana di Cinematografia Scientifica della quale è stato per anni presidente, come Le giornate del film etnografico italiano a Roma, i seminari/rassegna Materiali di antropologia visiva, in collaborazione con il Museo Nazionale delle Arti e Tradizioni Popolari di Roma, la Rassegna internazionale di documentari cinematografici e televisivi in collaborazione con l’Istituto Superiore Regionale Etnografico di Nuoro. Tra le sue realizzazioni audiovisive basti ricordare i film di ricerca sulla cinesica culturale e le collane cinematografiche “I suoni” e “Musica e Identità Video”, prodotte rispettivamente dalla RAI e dalla Discoteca di Stato. Sulla base di una comune quanto differente esperienza di formazione con Diego Carpitella, Laura Faranda, Francesco Giannattasio, Giovanni Giuriati e Antonello Ricci propongono di riattualizzare quella intensa stagione di ricerca e di studio, riprendendo la formula degli incontri di discussione con proiezioni: una formula memorabile, che ha dato luogo a vivaci scambi di esperienze e di punti di vista e che è stata a più riprese reinterpretata dallo stesso Carpitella. Nel prossimo mese di novembre 2010 avrà dunque luogo presso “Sapienza” Università di Roma il Convegno-Rassegna MAV 2010, articolato in tre giornate. La prima giornata avrà per tema la figura e l’opera di Diego Carpitella con interventi di specialisti e con la proiezione di suoi documentari. Nelle altre due giornate si alterneranno proiezioni di filmati e tavole rotonde di discussione a tema con relatori e autori dei film in rassegna. MAV, Materiali di Antropologia Visiva, is a biennial festival-meeting wich was founded by Diego Carpitella in the 80s. In 2010 it was restarted by a group of Carpitella’s students

MAV 2012 - Materiali di Antropologia Visiva

L’edizione 2012 di MAV Materiali di antropologia visiva si apre con una giornata interamente dedicata al regista olandese Joris Ivens, uno dei maggiori documentaristi del Novecento. Viene proiettato il suo film L’Italia non è un paese povero realizzato nel 1959 su commissione di Enrico Mattei per promuovere l’attività dell’Eni in quanto motore di una rinascita economica dell’Italia del secondo dopoguerra. Il film, destinato a essere trasmesso in tre puntate in tele-visione, ha una vicenda travagliata e in seguito alla censura della Rai sparisce letteralmente dalla circolazione. Nel 1996, grazie alle ricerche di un giovane cineasta, Stefano Missio, con-fluite nel documentario Quando l’Italia non era un paese povero, il film ritorna alla luce. Succes-sivamente, dal film di Ivens trae ispirazione un allora promettente autore, Daniele Vicari, che ne ripercorre l’itinerario nel documentario Il mio paese. Un episodio del film di Joris Ivens è girato in Basilicata, dove l’Eni sta compiendo sondaggi alla ricerca del metano negli stessi paesi delle ricerche etnografiche di Ernesto de Martino. Le musiche che accompagnano le immagini sono tratte dalle registrazioni effettuate qualche an-no prima da Diego Carpitella e dallo stesso de Martino e confluite in una delle raccolte di musica popolare conservate presso gli Archivi di Etnomusicologia dell’Accademia Nazionale di Santa Cecilia a Roma: una scelta che lega in maniera diretta L’Italia non è un paese povero alle vicende più importanti degli studi antropologici ed etnomusicologici italiani. Attraverso la proiezione dei tre film già ricordati e tramite le testimonianze di alcuni dei pro-tagonisti, MAV 2012 rende omaggio a Joris Ivens e, allo stesso tempo, attesta e mette in luce un altro piccolo tassello dell’elaborato mosaico della vicenda demartiniana quale precorritri-ce di un’antropologia visiva italiana. Nel secondo e nel terzo giorno della rassegna sono proiettati i filmati pervenuti, giunti nu-merosi a testimonianza che MAV continua a essere un punto di riferimento per coloro che si occupano di antropologia visiva in Italia. Le sessioni sono organizzate secondo il consueto e collaudato schema dell’alternanza di proiezioni e discussioni. MAV, Materiali di Antropologia Visiva, is a biennial festival-meeting wich was founded by Diego Carpitella in the 80s. In 2010 it was restarted by a group of Carpitella’s students. In the 2012 edition Antonello Ricci supervised the opening day that was dedicated to filmmaker Joris Ivens

Performance Analysis of a Single-Axis Tracking PV System

In this paper a performance analysis of a photovoltaic (PV) tracking system is conducted, to study its efficiency based on experimental results of a specific power plant. A single-axis system is analyzed, taking into account different indexes to better characterize the overall system performance. Experimental data have been collected by an on-site monitoring system over a period of one year, bringing some final considerations and comparative results on PV-system efficiency

Local dimensionality and inverse persistence analysis of atmospheric turbulence in the stable boundary layer

International audienceThe dynamics across different scales in the stable atmospheric boundary layer has been investigated by means of two metrics, based on instantaneous fractal dimensions, and grounded in dynamical systems theory. The wind velocity fluctuations obtained from data collected during the CASES-99 experiment were analyzed to provide a local (in terms of scales), and an instantaneous (in terms of time) description of the fractal properties and predictability of the system. By analyzing the phase space projections of the continuous turbulent, intermittent and radiative regimes, a progressive transformation, characterized by the emergence of multiple low-dimensional clusters embedded in a high-dimensional shell and a 2-lobe mirror symmetrical structure of the inverse persistence, have been found. The phase space becomes increasingly complex and anisotropic as the turbulent fluctuations become uncorrelated. The phase space is characterized by a three-dimensional structure for the continuous turbulent samples in a range of scales compatible with the inertial sub-range, where the phase space-filling turbulent fluctuations dominate the dynamics, and is low-dimensional in the other regimes. Moreover, lower dimensional structures present a stronger persistence than the higher dimensional structures. Eventually, all samples recover a three-dimensional structure and higher persistence level at large scales, far from the inertial sub-range. The two metrics obtained in the analysis can be considered as proxies for the decorrelation time and the local anisotropy in the turbulent flow

Local dimensionality and inverse persistence analysis of atmospheric turbulence in the stable boundary layer

International audienceThe dynamics across different scales in the stable atmospheric boundary layer has been investigated by means of two metrics, based on instantaneous fractal dimensions, and grounded in dynamical systems theory. The wind velocity fluctuations obtained from data collected during the CASES-99 experiment were analyzed to provide a local (in terms of scales), and an instantaneous (in terms of time) description of the fractal properties and predictability of the system. By analyzing the phase space projections of the continuous turbulent, intermittent and radiative regimes, a progressive transformation, characterized by the emergence of multiple low-dimensional clusters embedded in a high-dimensional shell and a 2-lobe mirror symmetrical structure of the inverse persistence, have been found. The phase space becomes increasingly complex and anisotropic as the turbulent fluctuations become uncorrelated. The phase space is characterized by a three-dimensional structure for the continuous turbulent samples in a range of scales compatible with the inertial sub-range, where the phase space-filling turbulent fluctuations dominate the dynamics, and is low-dimensional in the other regimes. Moreover, lower dimensional structures present a stronger persistence than the higher dimensional structures. Eventually, all samples recover a three-dimensional structure and higher persistence level at large scales, far from the inertial sub-range. The two metrics obtained in the analysis can be considered as proxies for the decorrelation time and the local anisotropy in the turbulent flow

Local dimensionality and inverse persistence analysis of atmospheric turbulence in the stable boundary layer

International audienceThe dynamics across different scales in the stable atmospheric boundary layer has been investigated by means of two metrics, based on instantaneous fractal dimensions, and grounded in dynamical systems theory. The wind velocity fluctuations obtained from data collected during the CASES-99 experiment were analyzed to provide a local (in terms of scales), and an instantaneous (in terms of time) description of the fractal properties and predictability of the system. By analyzing the phase space projections of the continuous turbulent, intermittent and radiative regimes, a progressive transformation, characterized by the emergence of multiple low-dimensional clusters embedded in a high-dimensional shell and a 2-lobe mirror symmetrical structure of the inverse persistence, have been found. The phase space becomes increasingly complex and anisotropic as the turbulent fluctuations become uncorrelated. The phase space is characterized by a three-dimensional structure for the continuous turbulent samples in a range of scales compatible with the inertial sub-range, where the phase space-filling turbulent fluctuations dominate the dynamics, and is low-dimensional in the other regimes. Moreover, lower dimensional structures present a stronger persistence than the higher dimensional structures. Eventually, all samples recover a three-dimensional structure and higher persistence level at large scales, far from the inertial sub-range. The two metrics obtained in the analysis can be considered as proxies for the decorrelation time and the local anisotropy in the turbulent flow

Local dimensionality and inverse persistence analysis of atmospheric turbulence in the stable boundary layer

International audienceThe dynamics across different scales in the stable atmospheric boundary layer has been investigated by means of two metrics, based on instantaneous fractal dimensions, and grounded in dynamical systems theory. The wind velocity fluctuations obtained from data collected during the CASES-99 experiment were analyzed to provide a local (in terms of scales), and an instantaneous (in terms of time) description of the fractal properties and predictability of the system. By analyzing the phase space projections of the continuous turbulent, intermittent and radiative regimes, a progressive transformation, characterized by the emergence of multiple low-dimensional clusters embedded in a high-dimensional shell and a 2-lobe mirror symmetrical structure of the inverse persistence, have been found. The phase space becomes increasingly complex and anisotropic as the turbulent fluctuations become uncorrelated. The phase space is characterized by a three-dimensional structure for the continuous turbulent samples in a range of scales compatible with the inertial sub-range, where the phase space-filling turbulent fluctuations dominate the dynamics, and is low-dimensional in the other regimes. Moreover, lower dimensional structures present a stronger persistence than the higher dimensional structures. Eventually, all samples recover a three-dimensional structure and higher persistence level at large scales, far from the inertial sub-range. The two metrics obtained in the analysis can be considered as proxies for the decorrelation time and the local anisotropy in the turbulent flow

Local dimensionality and inverse persistence analysis of atmospheric turbulence in the stable boundary layer

International audienceThe dynamics across different scales in the stable atmospheric boundary layer has been investigated by means of two metrics, based on instantaneous fractal dimensions, and grounded in dynamical systems theory. The wind velocity fluctuations obtained from data collected during the CASES-99 experiment were analyzed to provide a local (in terms of scales), and an instantaneous (in terms of time) description of the fractal properties and predictability of the system. By analyzing the phase space projections of the continuous turbulent, intermittent and radiative regimes, a progressive transformation, characterized by the emergence of multiple low-dimensional clusters embedded in a high-dimensional shell and a 2-lobe mirror symmetrical structure of the inverse persistence, have been found. The phase space becomes increasingly complex and anisotropic as the turbulent fluctuations become uncorrelated. The phase space is characterized by a three-dimensional structure for the continuous turbulent samples in a range of scales compatible with the inertial sub-range, where the phase space-filling turbulent fluctuations dominate the dynamics, and is low-dimensional in the other regimes. Moreover, lower dimensional structures present a stronger persistence than the higher dimensional structures. Eventually, all samples recover a three-dimensional structure and higher persistence level at large scales, far from the inertial sub-range. The two metrics obtained in the analysis can be considered as proxies for the decorrelation time and the local anisotropy in the turbulent flow