Alexander the Great's tombolos at Tyre and Alexandria, eastern Mediterranean

International audienc

Coastal and ancient harbour geoarchaeology

International audienc

La Delta du Tibre. Delta du Tibre. Campagne de carrotage 2008. Etude des canaux de Portus.

A description of the results of the programme of geoarchaeological coring undertaken at Portus in 200

Quantum wires obtained by dislocation slipping

Dislocation slipping is used as an atomic scale tool to cut a 5 nm GaAs single quantum well (QW) grown by MBE on a (001) GaAs substrate into quantum wires (QWW). Three point deformation bending is used to control dislocation slipping. The minimum value of the QWW widths is evaluated to 25 nm. PL studies after deformation show intense peak, shifted in regard to the undeformed SQW in good agreement with theory. Raman scattering results confirm the additional lateral confinement

Delta du Tibre. Campagne de carottage 2009: geoarcheologie des canaux de Portus: l’exemple du Canale Romano

International audienc

Archaeobotanical investigations at the imperial harbour of Rome

Remnants of the ancient harbour of rome are located in the tiber delta area 3.5 km away from the present coastline. it was the main rome maritime port from the middle of the first century to Late antiquity. in 42 ad, emperor Claudius started the excavation of the harbour. then, the emperor trajan added to the former construction, which had gradually silted up, a hexagonal basin in an inner position. the objective of this multidisciplinary study was to reconstruct the plant cultural landscape in the harbour applying detailed pollen, microcharcoal, and plant macroremains recovered from two cores (Pts5 and Pts13) drilled in the area of the Claudius harbour. the chronological framing of the records is based on stratigraphical criteria, radiocarbon dates, archaeological and historical data. the two cores record different periods of time. one core shows the first phases of the harbour activities, with a plant landscape typical of a coastal environment. the other one records a stronger human impact related to the presence of Portus town and of medieval settlements. anthropogenic pollen indicators (sensu behre and Jacomet 1991) as well as strong fire use/occurrence were increasing in the first centuries ad. these results will be completed with new core data from the extant trajan lake, granting the possibility to study a record spanning the last two millennia