The present invention recognizes and takes advantage of the fact that there is a correlation between a consumer’s overall like or dislike of two particular products, each evaluated individually, and the likelihood that the consumer will choose one product over the other in a forced choice comparison. Generation of a word-level network to model a constraints problem is presented. The input stage and interstage noise matching block utilize a suspended substrate matching circuit wherein the substrate is free space. It is thereby possible for a remote device to access the memory content of the memory module, and cause transfers of either full-size or scaled versions of the content to the remote device through a first network, and optionally further transfer the content from the remote device through a second network to the Internet in the form of an e-mail message or MMS attachment. Such methods are more secure and more efficient than typical re-encoding and re-encryption schemes, and are useful in developing such applications as document distribution and long-term file protection. The first and second driving-force transmitting units are switched therebetween by changing the rotational direction of the driving source.