A method, system, and program for logging calls according to call context are provided. The watermark detection system and method can be trained to detect or reject a particular pattern. The inner and outer conductors are spaced apart by a dielectric solid material, preferably elastomeric. Concentration in the metal-working fluid of at least one metal may be reduced using an using-exchange filter. Data can be read from the first predetermined set of queues to the first port at the same time that data is read from the second predetermined set of queues to the second port.