Culture and Politics in the Age of Globalization: Some Suggestions from Two Italian Philosophers

Over the past few decades, the global phenomenology of political power has changed. Unlike what happened in the past, increasingly the practical applications of scientific discoveries are no longer immediately or exclusively used by the legally formal- ized political power. They are consumed and disseminated throughout civil society escap- ing from the old logic of the legitimate power or judicial power and generating a new political power, which could be defined as \u201cglocal\u201d. All these new dynamics can be better understood through the lenses offered by past philosophical dialogues on the same topics and in this case we can enrich our perspective from a discussion, which was developed in mid-twentieth century Italy. In 1950, the formal establishment of the Soci\ue9t\ue9 Europ\ue9enne de Culture took place in Venice with the hope of building a bridge between West and East political Europe. Through constant reflection on the general development of European society, this cultural institution tried to focus on priorities regarding theory and practice, in order to foster cultural positions that could take ethical-political responsibilities regarding understanding, collaboration and peace. This commitment was theoretically founded on the concept of \u201cpolitics of culture\u201d, formulated by Umberto Campagnolo and expressed in a session of the General Assembly in November 1951 and later in January of 1952, Norb- erto Bobbio gave notice of it in the \u201cRivista di Filosofia\u201d (\u201cJournal of Philosophy\u201d), sharing the principles expressed by Campagnolo. The theoretical dialogue between the two philosophers intensified at the beginning of the 60s, when it became clear that the common civil commitment sprang from a different conception of philosophy and politics

Boundary between the thermal and statistical polarization regimes in a nuclear spin ensemble

As the number of spins in an ensemble is reduced, the statistical uctuations in its polarization eventually exceed the mean thermal polarization. This transition has now been surpassed in a number of recent nuclear magnetic resonance experiments, which achieve nanometer-scale detection volumes. Here, we measure nanometer- scale ensembles of nuclear spins in a KPF6 sample using magnetic resonance force microscopy. In particular, we investigate the transition between regimes dominated by thermal and statistical nuclear polarization. The ratio between the two types of polarization provides a measure of the number of spins in the detected ensemble

Graffiti removal from granite cladding by abrasive water-jet

This study focuses on the assessment of a graffiti removal system based on abrasive water-jet technology (AWJ). Spray paints were applied on samples of an important Italian granite commercially-named as “Rosa Limbara”. This granite has been used worldwide as dimension stone for paving and cladding. Two different commercial abrasives have been added in the high-pressure water-jet in order to clean the granite saw-plane surfaces from graffiti. After a check by the naked eye, different criteria have been chosen for assessing the effectiveness of the cleaning process: the similarity in roughness (Ra, Rz, and Rmax) between the original surface and the one resulted after cleaning, the total colour difference (ΔE) and the depth of material removed by the AWJ action. The tests showed that excellent cleaning results can be achieved with both abrasives by correctly combining the operational parameters of the technology (i.e., water pressure, spacing between passes, stand-off distance, travel speed and abrasive flow-rate) without giving any damage to the stone material. The two abrasives showed good results in total colour difference although one of them gave better results in both roughness difference and material removal. Economic considerations on paint removal with AWJ technology are also offered

Electric field sensing with a scanning fiber-coupled quantum dot

We demonstrate the application of a fiber-coupled quantum-dot-in-a-tip as a probe for scanning electric field microscopy. We map the out-of-plane component of the electric field induced by a pair of electrodes by measurement of the quantum-confined Stark effect induced on a quantum dot spectral line. Our results are in agreement with finite element simulations of the experiment. Furthermore, we present results from analytic calculations and simulations which are relevant to any electric field sensor embedded in a dielectric tip. In particular, we highlight the impact of the tip geometry on both the resolution and sensitivity.Comment: 10 pages, 4 figure

Nonlinear motion and mechanical mixing in as-grown GaAs nanowires

We report nonlinear behavior in the motion of driven nanowire cantilevers. The nonlinearity can be described by the Duffing equation and is used to demonstrate mechanical mixing of two distinct excitation frequencies. Furthermore, we demonstrate that the nonlinearity can be used to amplify a signal at a frequency close to the mechanical resonance of the nanowire oscillator. Up to 26 dB of amplitude gain are demonstrated in this way

On the validation of rainfall retrieval algorithms for satellite microwave data

The Algorithm Intercomparison Project utilises rainfall estimates derived from radar data to validate the algorithms developed for rainfall retrievals from satellite microwave data. Since seven minutes are needed in order to have a complete radar scan, while the acquisition of the corresponding satellite microwave image needs only a few seconds, the same pixel can be sensed by radar as much as seven minutes later. Within this time delay the raining cells can be displaced and the consequent mismatch can cause a decrease in the correlation coefficient of the comparison. A method to reveal this time-lag effect is presented and a possible approach to take it into account in the validation process for future missions is suggested