Harvesting energy from vibrations for powering small electronics.

Here's a paper I wrote examining piezoelectric vibration energy harvesters. Enjoy!

Further reading (papers I didn't have time to read before turning this assignment in but would like to revisit):

• Power transfer of piezoelectric generated energy
• Strategies for increasing the operating frequency range of vibration energy harvesters: a review
• Energy harvesting from low frequency applications using piezoelectric materials
• The design, fabrication and evaluation of a MEMS PZT cantilever with an integrated Si proof
  mass for vibration energy harvesting
• A Green and Clean Alternative for Sustained
  Power Production
• Two dimensional woven nanogenerator
• Converting Biomechanical Energy into Electricity by a Muscle-Movement-Driven Nanogenerator

Another area I'd like to read more about is triboelectric nanogenerators for wearable applications.