A system having a particulate matter sensor in an exhaust stream of an engine upstream from a particulate filter and another such sensor downstream from the filter. The vertebral alignment system of the current invention comprises an integrated system of alignment rods, cannulated pedicle screws, filler plugs and fixation hardware. The invention is particularly beneficial in the production of ethylene based polymers using Ziegler Natta catalyst systems. The tensive cutting head includes first and second opposing head members, the distance between which is adjustable and which may be driven apart by a cutting member tensioning device. The additional extraction liquid and the outflow of the blending static mixer can be combined in a vessel, or through the use of a static mixer manifold that includes a plurality of static mixers. Resources of the CPU are allocated according to the sensitivity of the at least one thread run by the cores.