Disclosed are a memory apparatus for a collective volume memory and a method for managing metadata thereof. The invention is for providing networks that are seats of a speed timing signal such as FastEthernet and Gigabit Ethernet networks or of higher speed Ethernet networks. Related systems methods for determining a radiation isocenter andor generating a 3-D visualization of the radiation isocenter using radiation patterns obtained using a phantom are also described. Forward movement discharges the stack to the elevated tracks, and the carriage is drawn back to the starting position, where a latch is released to allow the pivot frame to return to its original orientation against the resistance of an air cylinder. The liquid absorber is accommodated in the cap. The composition when set has improved water absorption properties.