966 resultados para Accademia della Fucina, Messina, Italy.


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Mode of access: Internet.

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Graphene exhibits electrical and optical properties promising for future applications in ultra-fast photonics[1]. High carrier mobility and Fermi velocity[2, 3] combined with its constant absorption over the visible wavelength range to the near-infrared[4] potentially allow its application for photodetection over a broad wavelength spectrum, operating at high frequencies. However, absorption being 2.3% per monolayer[4], responsiv-ity of these devices is rather low[5, 6]. Here we show that by combining graphene-based photodetectors with metal-nanostructures, plasmonic effects lead to an increased respon-sivity. © 2011 by the Author(s); licensee Accademia Peloritana dei Pericolanti, Messina, Italy.

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We study optical trapping of nanotubes and graphene. We extract the distribution of both centre-of-mass and angular fuctuations from three-dimensional tracking of these optically trapped carbon nanostructures. The optical force and torque constants are measured from auto and cross-correlation of the tracking signals. We demonstrate that nanotubes enable nanometer spatial, and femto-Newton force resolution in photonic force microscopy by accurately measuring the radiation pressure in a double frequency optical tweezers. Finally, we integrate optical trapping with Raman and photoluminescence spectroscopy demonstrating the use of a Raman and photoluminescence tweezers by investigating the spectroscopy of nanotubes and graphene fakes in solution. Experimental results are compared with calculations based on electromagnetic scattering theory. © 2011 by the Author(s); licensee Accademia Peloritana dei Pericolanti, Messina, Italy.

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Collection bought by the Grand Duke of Tuscany for the Biblioteca Palatina, which united with the Biblioteca Magliabechiana in 1861 to form the R. Biblioteca nazionale centrale.

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The present essays shows that the Italian dictionaristic tradition started with the publishing of the first monolingual dictionary, edited by the Accademia della Crusca, in 1612, whose participants used to defend the purity of the Florentine language. The selection of vocabulary for this first dictionary has reflected the thought of an intellectual elite. In fact, this first edition does not display a single word from Portuguese, despite the frequent commercial and cultural contact that existed between the Portuguese people and several Italian states and republics.

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A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 10(18) eV at the Pierre Auger Observatory is presented. This search is performed as a function of both declination and right ascension in several energy ranges above 10(18) eV, and reported in terms of dipolar and quadrupolar coefficients. Within the systematic uncertainties, no significant deviation from isotropy is revealed. Assuming that any cosmic-ray anisotropy is dominated by dipole and quadrupole moments in this energy range, upper limits on their amplitudes are derived. These upper limits allow us to test the origin of cosmic rays above 10(18) eV from stationary Galactic sources densely distributed in the Galactic disk and predominantly emitting light particles in all directions.

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El índice, con pag. propia, en el vol. 2.

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Vol. 1 includes: Degli scrittori del Trecento e de'loro imitatori, libri due, del conte G. Perticari. Vol. 3 includes: Dell'amor patrio di Dante e del suo libro intorno il volgare eloquio; apologia composta dal conte Giulio Perticari. Vol. 4, by V. Soncini, ed. by A.F. Stella, has title: Appendice alla Proposta di alcune correzioni ed aggiunte al Vocabolario della Crusca.