Ethylene polymerization processes employing bis-imino pyridinyl transition metal components which exhibit C2, C2v or Cs symmetry. The system receives a data signal and detects the occurrence of a power transient. Also disclosed is an article of manufacture for delivering an antigen that induces a CTL response in an animal. The adjustable abutment assembly may be secured to an anchoring implant bored into the bones within the mouth.