Alternate characterizations of golf ball striking ability is provided, as well as methods for determining the alternate characterizations and systems for carrying out such determinations. A device for outputting an optical signal having a variable optical power into an optical fiber transmission line is provided. Further, the system architecture includes a cross channel rendering technique for constructing the control string in such a manner as to verify process correctness at one or more process station. Authentication of a received marked text document is performed by a recipient, sharing the secret-key, further comparing the received text document to the marked text document so that if they are matching exactly the received text document is accepted as authentic or rejected as fake if not. Such computation and adjustment are performed until the error is within an acceptable range. The compression is carried out below the glass transition temperature for amorphous polymers or between glass transition temperature and melting point for crystalline polymers, and preferably at ambient temperature.