118,199 research outputs found
Interventions, Productions and Collaborations:the relationship between RAI and visual artists
No full textOn the 17th May 1952, before RAI Radiotelevisione Italiana Studios began their regular broadcast from Milan, the Spatialist painter and sculptor Lucio Fontana broadcast his own experimental ‘artwork’ on Italian television, beginning a fruitful relationship between RAI and visual artists. For some, it provided careers as designers and art directors, such as the painter Mario Sasso and the Arte Povera artist Pino Pascali, while for others, who were given unique access to RAI’s television apparatus, it was an opportunity to explore their own artistic experimentations with an expensive and exclusive medium, such as Carlo Quartucci and Gianni Toti. RAI also hosted seminal artists’ performances on screen including John Cage and Fabio Mauri. This article, based on documents and interviews collected during the Arts and Humanities Research Council funded project REWINDItalia, discusses these and other seminal cases as well as tracing and assessing the history of this fruitful and complex exchange between RAI and visual artists
Reply to Comment on ``Spherical 2+p spin-glass model: an analytically solvable model with a glass-to-glass transition''
No full textIn his Comment, Krakoviack Phys. Rev. B 76 136401 (2007)] finds that the phase behavior of the s+p spin-glass model is different from that proposed by Crisanti and Leuzzi Phys. Rev. B 73 014412 (2006) if s and p are larger than 2 and are separated well enough. He proposes a trial picture, based on a one step replica symmetry breaking solution, displaying a mode-coupling-like glass-to-glass transition line ending in an A3 singularity. However, actually, the physics of these systems changes when p−s is large, the instability of which the one step replica symmetry breaking glassy phase suffers turns out to be so wide ranging that the whole scenario proposed by Krakoviack must be seriously reconsidered
At the mirror:European women video pioneers between identity and representation
No full textThis piece is a rework of some theories outlined L. Leuzzi, ‘Self/Portraits: The Mirror, The Self and The Other. Identity and Representation in Early Women’s Video Art in Europe’ in L. Leuzzi, E. Shemilt, S. Partridge (eds.), EWVA European Women’s Video Art in the 70s and 80s, New Barnet, John Libbey Publishing, 2020
At the mirror:European women video pioneers between identity and representation
No full textThis piece is a rework of some theories outlined L. Leuzzi, ‘Self/Portraits: The Mirror, The Self and The Other. Identity and Representation in Early Women’s Video Art in Europe’ in L. Leuzzi, E. Shemilt, S. Partridge (eds.), EWVA European Women’s Video Art in the 70s and 80s, New Barnet, John Libbey Publishing, 2020
An assessment on low-voltage low-power integrated single transistor active inductor design for RF filter applications
No full textIn this paper an assessment of bandpass filter implementation based on a single transistor Active Inductor (AI) is presented. A minimum number of components, high linearity, high dynamic range, active inductor is first designed and then used for high frequency bandpass filter. The AI is designed by the use a compensation network that allows to control both the inductance and its series resistance value in the design phase. Analytical formulation is also presented and a simulated IC demonstrator proposed for the filter that has a center frequency of 2000MHz (useful for radio and radar applications) and a 3dB bandwidth of about 6MHz with a quality factor of about 330
RF active circuit simulating a floating inductance
No full textIn this paper a new design scheme simulating a floating inductive behavior at RF frequency is presented. The proposed floating active inductor shows a very high quality factor, high linearity and is suitable for many microwave applications and ICs. The design is a fully symmetrical two-port and reciprocal structure, based on two cascaded pairs of highly linear capacitance gyrators. It shows an inductance value of 370nH at 220MHz with a quality factor greater of 6e4. A prototype board has been fabricated with discrete components and tested with successfully results
Class AB gyrator-based active inductor
No full textIn this paper a new approach for the design of class AB active inductors is proposed. Several active solutions have been presented in the literature for replacing spiral inductors with active solutions, but class AB operation is something neglected in the literature. The proposed solution shows an easy implementation of equivalent inductors with improved characteristics of linearity and reduced losses. For demonstrative purposes the circuit has been fabricated and tested showing a series resistance of 16mΩ at 1.92GHz for an equivalent inductance of 1nH. The total power consumption is 2mW, making this solution suitable for ICs and wireless applications
Complexity of waves in nonlinear disordered media
No full textThe statistical properties of the phases of several modes nonlinearly coupled in a random system are investigated by means of a Hamiltonian model with disordered couplings. The regime in which the modes have a stationary distribution of their energies and in which the phases are coupled is studied for arbitrary degrees of randomness and energy. The complexity versus temperature and strength of nonlinearity is calculated. A phase diagram is derived in terms of the stored energy and amount of disorder. Implications in random lasing, nonlinear wave propagation, and finite-temperature Bose-Einstein condensation are discussed
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