What are the conditions that favor the formation of built-up edge?
One of the conditions that favor the formation of a built-up edge is low cutting speed. The metal being cut should also work-harden and should be reluctant to recover such as alloys like steel.
Hot Chisels are used for cutting metals in hot conditions. The edge of a hot chisel is 30 degree and hardening of the edge is not necessary. On the other hand cold chisels are used for cutting metals in cold conditions. The edge of a cold chisel is hardened and tempered and has an angle of about 60 degrees.
This is a topic of debate and may go on for a long time. Based on the number of title reigns, popularity among fans etc Edge would be the better guy. Edge is also part of the WWE Hall of Fame which Rey Mysterio currently isn't. Mysterio is definitely a future hall of famer but currently isn't. so, currently the scales would tip slightly in favor of Edge.
Edge effects are different conditions along the boundaries of an ecosystem. Change in an ecosystem's edge can affect an organism because animals from one area might migrate from the area or move to the new edge, thereby bringing species from different ecosystems in contact with one another. Read more: http://wiki.answers.com/Q/How_change_in_an_ecosystem's_edge_can_affect_organism#ixzz1wV9rwfti