A packing tray is provided for use in both cell pack and tray pack arrangements. The medical article comprises a plastic portion and an active color changing specie, wherein the color changing specie is capable of changing color after exposure to a color change activator. The processors are connected to form a two dimensional matrix connected by one drop busses. Furthermore, a gap is inserted in the information to send to the host device such that the host device is capable of sending additional commands to the drive. The attributes estimate the target object properties The particles’ update cycles include: determining a degree of belief for each particle to estimate the target object properties; determining a weight for each particle based on at least the determined degree of belief and generating new particles for update cycle n+1 in an evolutionary process.