A photodiode includes a semiconductor having front and backside surfaces and first and second active layers of opposite conductivity, separated by an intrinsic layer. of 50 to 200 mm2s; the thickener contains a diurea compound represented by formula : R1\u2014NHCONH\u2014R2\u2014NHCONH\u2014R3 ; and the additive is at least one selected from the group consisting of a metal salt of naphthenic acid, a salt of a fatty acid having 6 to 10 carbon atoms and an aliphatic amine having 6 to 10 carbon atoms, and a metal salt of an organic sulfonic acid. In this manner, an account authority service or other authentication provider verify both factors and provide a security token in accordance with the security policy of the account network resource the user is intending to access. The micro-encapsulated UV absorber is suitable for either a water-based system or solvent-based system. If for any reason the animal does loose his footing, the weight of the animal will be supported and generally equally distributed to the trailer support structure to maintain the load balanced between the wheels and prevent the weight of the trailer from shifting, thereby reducing the likelihood of overturning and causing injury to the human passengers of the towing vehicle as well.