Labs (c) Yury V. Zaytsev (yury at shurup.com) and Art Vorobiev (art at shurup.com), 2006. 

Use with care. The report on the phase planes needs some work to complete. The are errors in the report about the filters. I 
think I messed the axes up one more time. Anyway, be very attentive. The reports are provided for educational purpose only and we can't be held liable for 
any direct or inderect damage they might cause.