Aqueous based emulsion copolymers containing vinyl ethylene carbonate, vinyl acetate, and one or more other ethylenically unsaturated monomers, and aqueous based poly-containing emulsion copolymers formed by emulsion copolymerization of vinyl ethylene carbonate, vinyl acetate, and optionally one or more other ethylenically unsaturated monomer, in the presence of poly. The method includes determining whether an input voltage of the motor enters into a predetermined voltage range; generating a pulse width modulation signal when the input voltage of the motor enters into the predetermined voltage range; and driving the motor to rotate according to the pulse width modulation signal. Such heat treatment prevents strain age cracking and also prevents recrystallization in areas that are not heat treated. The method in accordance with the invention further comprises the step of retrieving a subset of parameter settings from the plurality of parameter settings, wherein the retrieved subset of parameter settings provides specifications for a subset of parameters of the plurality of parameters, wherein the subset of parameters is used to monitor the object. The bearing units are coupled between the barrels for providing concentric alignment of the barrels and allowing rotation therebetween. At least part of the hard mask layer on the side of the line is removed.