A user may utilize a communication device, e. The partition panel includes peripheral flanges for supporting the base of the dental model, and an openable central portion for enabling a hardened dental model to be ejected from the tray, and for providing access for manipulating pins depending downwardly from die segments. At least one back reflector andor one filter is assigned to the infra red emitters, whereby the at least one back reflector andor the at least one filter is segmented. Providing increased page density is an effective method for reducing DTLB andor data cache misses.