A retrievable frac mandrel and a well control adapter are used to efficiently accomplish well completion, re-completion or workover. The measurement module includes measurement circuitry, e. Thereafter, multiple mean values for absolute values less than a predetermined number of threshold values are determined. Since the photoacid generating polymer of Formula 1 is not water-soluble and acts as a photoacid generator, it can be used to prepare a top anti-reflective coating composition for immersion lithography. This data is then processed and stored into an internal database for the express purpose of allowing timely access to stability and configuration information. The contraction of the actuator extends a foot element such that it can excerpt a pushing force against a ground surface.