Abstract: A communication system and method for transmitting information in the form of binary digital data to be transmitted is encoded into two separate two level sequences S1 and S2 such that the first occurrence of a logic "1" is encoded into the same level in both sequences and each subsequent occurrence of a logic "1" is encoded into the level opposite of the previous level representing a logic "1" in each of the sequences S1 and S2, and the first occurrence of a logic "0" is encoded into opposite levels in sequences S1 and S2 and every subsequent occurrence of a logic "0" is encoded into the level opposite of the previous level representing a logic "0" in each of the sequences S1 and S2. The two encoded streams drive optical signal producing means of respectively different wavelengths and the two optical signals are transmitted over a wavelength-multiplexed fiber-optic link.

Abstract: Armor element for protection against projectiles, formed by a core made of ceramic material covered with a metal envelope obtained by casting around the core a resilient alloy having high antiballistic efficiency.The envelope is strongly prestressed at casting around the ceramic core in order to inhibit the fragmentation thereof under shock due to the impact of a projectile.The invention can be applied to constructing flexible armor implements by assembling and hingedly interconnecting juxtaposed armor elements.