An engine is provided to facilitate installation of a compressor on an engine. The core-shell polymer includes a shell and a core, wherein the weight of the shell is less than 10% of the weight of the core. The double-layered film forms first interconnection lines for connection to the TFTs. The actual pathology of the valve is accommodated by providing for multiple dimensions of adjustability of the device, including adjustability of the size of the device as well as adjustability of the elevation or inclination of one portion of the device with respect to another portion of the device.