LE IMPOSTURE DEL CIBO. ARGOMENTI PER UNA ESPOSIZIONE DELL' 'ABSENTIA'

According to Ugo Volli, «what defines the identity of any semiotic object is its ability to carry out a specific set of functions». But what happens if the semiotic object does not achieve these functions? If the semiotic object does not keep its promises? What is the relation that connects the presence of a semiotic object with its ‘natural task’? Thus, what happens for example to the food if it cannot be enjoyed, if it does not feed? If it is present on the scene but so distant as to become unreachable and to make its natural function absent? In this particular case it is appropriate to bring up the concept of absentia. «LC». Rivista Dipartimento Letterature e Culture Europee Università d…

I fondali marini della penisola di Capo San Vito (Sicilia Nord-Occidentale)

Geoacoustic Inversion with Drifting Buoys: Enverse 1997–98 Experiments (Marettimo Is.)

Acoustic buoys were developed to allow the rapid determination of range-dependent bottom properties in a shallow water environment from the inversion of propagation measurements. The main features of the buoys are the large dynamic range, digital signal conditioning unit, global positioning system receiver and reliable radio data link. The buoys drift away from a broadband source receiving its pings at known positions. Single hydrophone, matched waveform, inversion techniques are applied to the received signals to invert for geoacoustic parameters. Eight prototypes were tested over the southern continental shelf off the island of Marettimo (Sicily) during the EnVerse 97 sea trials. Calibrat…