Provided is a DC-DC converter that can reduce losses. A turbine housing is mounted on the central housing part on a turbine side and a compressor housing is mounted on the central housing part on a compressor side. In another embodiment, a method for computing statistics for historical data includes accessing at least one online stream of historical data, the online stream of historical data including metadata, and creating data blocks from the at least one online stream of historical data. A workpiece carrier is provided, wherein the workpiece carrier is configured to hold the second workpiece above the heater, and wherein a diameter of the workpiece carrier is associated with the electrostatic clamping plate annulus.