Sounds like the R2D2 Star Wars robot.
Assistive technology to help people with Parkinson's Disease and Essential Tremor.
Deaf Professional Arts Network. Song is "We're Going To Be Friends" by the White Stripes
A Stirling engine is a heat engine operating by cyclic compression and expansion of air or other gas, the working fluid, at different temperature levels such that there is a net conversion of heat energy to mechanical work.
Nuernberg, Germany