A system correlates application information from within a virtual guest to an entity managing off-host data protection. The non-linear filtering is performed preferably using an envelope-dependent boundary. The particulate is selected from specific material particles having an average diameter from 1 to 10 micron and a refractive index that is within 0. The voltages charged to the capacitors Cn and Cp are supplied to operational amplifiers through an N-bias line 11 and a P-bias line 12 as bias voltages VbiasA and VbiasB, respectively, so that the operational amplifiers are controlled to be biased at high biases. One particular implementation uses fiber optic cable with a cementing process whereby flowing cementing fluid pulls the portion of the cable into the exterior annulus.