We present here the results of a technological and typological analysis of the Acheulian and early Middle Paleolithic assemblages from Torre in Pietra (Latium, Italy) together with comparisons with the Acheulian small tools of Castel di Guido. The assemblages were never chronometrically dated before. We have now 40Ar/39Ar dates and ESR-U-series dates, within a geomorphological framework, which ...

Large-flake graphene membranes up to 300 microm(2) can be exfoliated from graphite by oleyl amine based on solvothermal conditions. The exfoliated graphene sheets are of high quality and have few defects. The graphene dispersion, predominantly composed of monolayer graphene, had a high concentration of 0.15 mg ml(-1), and can be stabilized against re-aggregation.

This paper combines individual-level data from the German Socio-Economic Panel (SOEP) with economic and demographic postcode-level data from administrative records to analyze the eff ects of immigration on wages and unemployment probabilities of highand low-skilled natives. Employing an instrumental variable strategy and utilizing the variation in the population share of foreigners across regio...

Undoped and cobalt doped copper selenide thin films have been successfully prepared unto fluorine tin oxide (FTO) substrates by electrodeposition method using acetate, nitrate selenium (IV) as precursors for copper, ions respectively. Deposited were subjected to optical, structural, morphological, compositional electrical analysis spectrophotometer, x-ray diffractometer, scanning electron micro...

Our understanding of variation in the technology of flaked stone artefacts from mainland Southeast Asia during the terminal Pleistocene and Holocene periods has improved little since they were originally labelled ‘‘Hoabinhian’’ in 1932. Chronological and geographical variation has been described in terms of typological differences, but there are few anthropological explanations of lithic divers...

Boards of acceptable quality were made from barky material, pressure-refined from 14 species of southern hardwoods. Static bending and tensile properties (parallel to surface) of specimens were negatively correlated to stem specific gravity (wood plus bark), chip bulk density, and fiber bulk density. Bending and tensile properties increased with increasing densification ratio, but the rate of i...

The authors suspected that suspended onion particles contributed to corneal ulcers in onion harvesters in southern Taiwan. In the present study, the authors used manikins to study suspended onion particles in fields in an effort to simulate typical conditions experienced by onion harvesters. An animal eye-exposure simulation study was also performed by the authors, who impacted suspended soil g...

Aluminum-based composite material is one of the most important candidate materials in mechanical industry and aerospace engineering due to its light weight high strength. Graphene an ideal reinforcement for excellent properties. Till-now, contribution graphene sheets process crack propagation composites not clear. In present work, effects size distribution graphene/aluminum are explored using m...