Hello. I am currently working on a project to build a prototype concerning the topic of energy. My group has brought up the idea of developing a floor system made of piezoelectric materials with sensors to generate electricity for houses. I have been searching earnestly to find information about piezoelectric materials, and piezoelectricity in general. I have searced several scientific journal collections, Google, MIT course outlines, my university library and I have found very little helpful information. I do not know much about this topic, so I really would like to find a place to get more research done. The best paper that I have found thus far is: "Human-powered wearable computing" by Thad Starner. DOES ANYONE KNOW ANYWHERE ELSE I CAN GO TO FIND MORE INFORMATION ON THIS TOPIC?