Techniques for reusing logic implemented in an existing software application such that the logic can be exposed as a Web service or in any other service-oriented context. The hydrocyclone liner includes a head section that is fashioned, primarily, of a highly erosion-resistant material, such as tungsten carbide. An impeller of the blower may have blades with trailing edges oriented at an angle between 80\xb0 to about 90\xb0 relative to an axis of the shaft of the generator. Alternatively, bonding pads are provided on the back surface of a chip and are connected to the circuit elements on the front surface of the chip through the openings in the chip.