An architecture which allows real-time video editing using a 2D3D graphics engine. The sample holder may comprise a shoulder arranged on the outer surface to engage a second holder and to position a top opening of the sample holder for communication with the second holder. An auxiliary computer is connected to the controller by a second IO interface. Based on the time of the call, the instructions to be applied can differ. Once a cardiac event is detected, a pathway is computed which extends from a generally normal heart rate variability condition to an abnormal heart rate variability condition. The repair composite is composed of an amount of an isophalic polyester casting resin premixed with dry silica sand, cobalt in combination with dimethylanaline, and a catalyst, such as Lupersol.