A method, system, and computer-readable medium for identifying sequences of interaction events of interest that frequently occur is described. Next, a reconstructed value is determined, based on a difference between pixel values in corresponding locations in a reconstruction from an encoding of the first picture and a reconstruction from an encoding of the second picture. The bottom member includes a first portion and a second potion and also defines a horizontal plane. The method further includes the step of placing the charges in a respective cylinders, tilling the cylinder with the fluid and detonating the charge, and recording the cylinder radial velocity during radial expansion and post-mortem material properties. The link mechanisms are caused to extend and contract, together as an integral unit, via the connecting member in response to linear reciprocating movement of the actuator.