A barrel polishing device for polishing a workpiece having a relatively complicated shape such as a vehicle wheel. A network system includes: multiple communication systems for communication with a user; multiple physical network management servers that manage multiple physical networks including multiple routers; and a virtual network management server that manages a virtual network connecting the communication systems with each other through the physical networks. 1% by weight of the surfactant 0. A door in the frame is displaceable between an open position and a closed position. According to at least one embodiment, the system for visually displaying and analyzing includes selecting and performing at least one aberration detection method such as applying CUSUM analysis, quantile measures, andor bootstrapping analysis, and displaying the result to a user via a visual analytics arrangement.