The invention relates to data packet filtering and finding a rule matching a data packet in a rule base. The cooling apparatus includes: multiple discrete cold plates, each having a coolant inlet, a coolant outlet and at least one coolant chamber disposed therebetween; and multiple coolant-carrying tubes, each tube extending from a respective cold plate and being in fluid communication with the coolant inlet or outlet of the cold plate. The diol- or triol-containing solution is then collected from the permeate flow of the nanofiltration membrane. The closure is particularly useful for liquid products which tend to separate into a lighter and heavier fraction during storage. by turning the phone off, changing the ringer’s pitch, or placing the phone in a vibrate mode. This allows the position andor displacement of an object to be opto-electronically detected in a simple and practical manner.