A linear compressor is provided. Output voltage of the regulator can be controlled by monitoring headroom voltage measured as the difference of a fixed reference voltage and the output voltage. A conductor junction having 3 ports couples radio frequency energy to the circulator. Responsive to receipt of data indicative of drag and drop movement of an icon between the first and second screen areas, the gap is recalculated and a resized gap is displayed. If so, the enterprise service bus obtains an address of a service provider application associated with the constructed service name in the registry and sends a request for the service matching the constructed service name to the service provider application. According to exemplary embodiments, a bar target with alignment holes is used for automatically determining the orientation of the bar target.