**Preface to "Energy Harvesting and Energy Storage Systems"**

Energy harvesting or the process of acquiring energy from the surrounding environment has been a continuous human endeavor throughout history. The research and development on energy harvesting and energy storage methodology are growing very rapidly. Hence, it is necessary to summarize recent advances in energy harvesting and energy storage systems. This book covers various aspects of optimization algorithms, evaluations of wind energy turbines, electrostatic vibration energy transducers, battery management systems, thermoelectric generators, distribution networks, issues of renewable energy micro-grid interfacing, fuzzy-logic-controller-based direct power controls, parameter estimations of fuel cells, and ultra-low-power supercapacitors. This book is beneficial for young researchers (Bachelor, Masters, and Doctoral students), who are new to this area. We would like to take this opportunity to thank all of the authors for their excellent efforts, as well as the reviewers for their insightful remarks and suggestions.

> **Shailendra Rajput, Moshe Averbukh, and Noel Rodriguez** *Editors*
