Photovoltaic cells, including silicon solar cells, and methods and compositions for making such photovoltaic cells are provided. The bus has a plurality of signal lines including critical control signal lines. Using the simulation instantiated within the synthesis system, deterministic test pattern generation is performed to obtain a first portion of a test pattern. Relevancy scores are generated for the plurality of users, the relevancy scores indicating relevancies of the incoming message to the plurality of users based on the similarity scores and a plurality of user profiles including information descriptive of the plurality of users’ preferences for the features of the plurality of users. Furthermore, it has also been found that resins of the present invention can also be made to have \u201c+C plate\u201d behavior either by melt or solvent based processing, a characteristic which is not typical of cellulose esters.