An electrical power feed for a submarine system and a method of supplying electrical power to the submarine system in which a plurality of power converters are used for feeding electrical power into the submarine system. A plurality of control circuits are each connected to at least one of the power converters and control the level of power output by the respective power converter(s) to which it is connected. Each power converter is connected to only one control circuit and at least some of the ...

A method and an apparatus for optical transmission line power feed interference compensation for compensating for an electrical interference signal in a power feed conductor (12; 52) and in an associated second conductor (14; 54). The interference signal may be produced by electromagnetic induction or by local variation in earth potential. The compensation is performed by producing a variable compensation signal from an electrical interference signal produced in the second conductor and inputtin...

A cross linked high molecular weight polymer formed from a water soluble monomer or blend of monomers and which has IV and/or solubility and/or rheology properties indicating that it would be unsuitable for use as a flocculant can be used as a flocculant after shearing the polymeric material. The shearing may be applied to the polymeric material before addition to the suspension that is to be flocculated or can be applied to the suspensionthat is being flocculated. The shearing increases the int...