Abstract The archaeometric investigation of 46 potsherds “Torre Alemanna type” pottery aimed to define a compositional reference group and understand the technological characteristics its production. Principal component analysis applied bulk chemical data (XRF) ceramic body showed strong homogeneity. Their comparison with local clays 6 fragments bricks sampled from kiln, on one hand, revealed u...

A representative selection of glazed ceramics recovered from medieval Islamic contexts excavated in the former Roman port Utica (North Tunisia) (23 99 pieces) has revealed new data about glaze technologies central Mediterranean. Stratified sequences pottery have established four main phases occupation which span mid-tenth to mid-eleventh centuries. Significant changes range wares are found Ziri...

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This paper discusses a known-plaintext attack on a redundancy reducing cipher method which is proposed by Wayner. We also propose an extension of Wayner’s redundancy reducing cipher scheme so that the security will be improved greatly.

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All the known chromium(III) NASICON-related phosphates are considered to be solid solutions. In these compounds chromium atoms share their position in the basic framework of the crystal lattice with other structure forming elements such as zirconium. In our study, we have hypothesised a completely new way of structural organisation of the chromium(III) zirconium(IV) NASICON framework, consistin...