This invention relates to acrylate based polymerizable compositions and adhesive systems prepared therefrom, which include an initiator system comprising a complex of an organoborane with a complexing agent, an aziridine-containing compound, and a carrier material with which the initiator system is unreactive and which renders the composition having a flash point above 140\xb0 F. A modified pseudo-random sequence is formed from the resultant modified encryption key. The method including the steps of: receiving the content, creating a continuous watermark sequence from the watermark, and for each content sample in a first predetermined order: calculating a sample mean, calculating a sample variance, and normalizing the content. The lens group is utilized to enlarge the image, and the lens group includes a first lens with positive power and a second lens with negative power. By placing the post through an appropriate opening in the medical article to be retained and then securing the medical article to the retainer by placing the cap into the covered position over the post, longitudinal and lateral motion of the medical article is inhibited. One or more of the contact surfaces may be coated with a resilient material such as diamond.