Abstract: An apparatus for producing a three-dimensional work piece is provided. The apparatus comprises a carrier configured to receive multiple layers of raw material powder, an irradiation unit configured to direct a radiation beam to predetermined in sites of an uppermost layer of the raw material powder in order to solidify the raw material powder at the predetermined sites, a process chamber defining a volume through which the radiation beam is directed from the Irradiation unit to the raw material powder, and a support structure provided outside the process chamber and supporting the irradiation unit.

Abstract: Systems for management of room cleaning at an accommodation facility such as a hotel. The system records variables related to the occupancy of rooms at the facility and/or operational characteristics of the facility. Daily cleaning times are determined for rooms in accord with the variables. Daily cleaning plans are then determined for the facility in accord with the cleaning times. Cleaning staff carry out the plan and report their progress using conventional means such as the local telephone system or wireless PDAs.

Abstract: Systems for management of room cleaning at an accommodation facility such as a hotel. The system records variables related to the occupancy of rooms at the facility and/or operational characteristics of the facility. Daily cleaning times are determined for rooms in accord with the variables. Daily cleaning plans are then determined for the facility in accord with the cleaning times. Cleaning staff carry out the plan and report their progress using conventional means such as the local telephone system or wireless PDAs.