Biography: I'm Yu-Jen Ku, a graduate student at the Electrical and Computer Engineering (ECE) department of University of California - San Diego (UCSD). I am currently working with Professor Sujit Dey at the Mobile Systems Design Lab. My research interests include renewable energy powered green communication, and resource allocation in Heterogeneous Wireless Network. I received my bachelor degree at Electrical Engineering department of National Taiwan University (NTU). I like to play tennis, soccer and travel.