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Ph.D. Students

Xiao Wang

Xiao Wang is a Ph.D student in the ECE department since Fall 2012 at Purdue University. His research project is "Energy Efficient Humanoid Robot". His research interests include Humanoid Robot Control,High Performance Computing,Computational Geometry, Algorithm Design.


Jianxin (Jason) Xun

Jianxin (Jason) Sun received his B.S and M.S in Electronic and Information Engineering from Harbin Institute of Technology, China, and Computer and Electronics Engineering from Nebraska-Lincoln, USA. He is now pursuing Ph.D degree in ECE at Purdue University. His research areas include Eneergy Efficiency and Power Management, Multimedia Delivery and Networking, Wireless Communication and Sensor Networks.

Past Visitor

Edward Chu

Edward visited Purdue in 2009 when he was a PhD candidate in the Department of Computer Science at National Tsing Hua University. He is currently an assistant professor at National Yunlin University of Science and Technology, Taiwan.

PhD Alumni


Jing (Jackie) Feng (PhD 2012) Energy-Efficient Collaborative Data Transmissions in Wireless Sensor Networks

Jing (Jackie) Feng is a Ph.D student in Electrical and Computer Engineering since Fall 2007 at Purdue University. Her research project is Beam Forming Using Randomly Deployed Sensor Networks. Her reseach interests include embedded systems, wireless sensor network, and digital circuit design.


Karthik Kumar (PhD 2011). Thesis: Application-Based Energy-Efficient Mobile and Server Computing

Karthik received his Ph.D. in August 2011. His dissertation is on Energy Conservation for Mobile Content-based Image Retrieval. His research interests include image and video retrieval, embedded systems, computer architecture and neural networks. He joined Intel in Arizona.


Yamini Nimmagadda (PhD 2010). Thesis: Resource-Driven Transmission, Display, and Processing of Multimedia in Mobile Devices

Yamini received her Ph.D. in November 2010. She joined the HELPS group in Fall 2006. Her research is developing Image Processing Algorithms for Energy Conservation in Portable Devices. Her research interests include image/signal processing, wireless communications, and computer graphics. Yamini is currently employeed by Intel in Oregon.

Eddie Pettis (PhD 2008) Thesis: Automatic Configuration and Selection of Power Management Policies

Dr. Eddie Pettis received his B.S. in Electrical Engineering from the University of Arkansas in 2002 and his Ph.D. in Electrical and Computer Engineering from Purdue University in 2008. His graduate research focused on operating system directed power management techniques for general purpose computing environments. Currently, Dr. Pettis is a Staff Software Engineer and Tech Lead Manager for Google in Mountain View, CA. Since joining Google, he has developed firmware for various cooling and power systems, researched UPS reliability, and architected state-of-the-art power and cooling management software. In his 20% time, Dr. Pettis volunteers for university programs at many schools, including Purdue University, Carnegie Mellon University, University of Texas, UC-Davis, and UC-Berkeley, and sponsors a Google Research Award with Dr. Tajana Rosing at UC-San Diego. He received a Google Technical Infrastructure citizenship award in 2012 for outstanding contributions outside his own team, especially his involvement with university programs. He has served as Governor at Large for the IEEE-HKN Board of Governors from July 2009 though December 2012. Dr. Pettis lives with his wife Charity in San Jose, CA.

Changxiu Xian (PhD 2008). Thesis: Collaborative Power Management between Operating Systems and Applications

Changjiu received his Ph.D. in Computer Science in May 2008. His research focused on collaborative power management between the operating system and applications. His other research interested include operating systems, energy-efficient applications, real-time systems, mobile robots, and sensor networks. Changjiu currently works at Microsoft in Redmond, WA.

Yongguo Mei (PhD 2007). Thesis: Energy-Efficient Mobile Robots

Yongguo's PhD thesis was on energy-efficient mobile robots. After graduation, he had worked at Microsoft for 4 years focusing on improving Windows 7 OnOff performance such as boot and hibernation. Since 2011, he has been working at Virginia Bioinformatics Institute, applying engineering techniques to immunology and other life sciences. His current research interests include computational biology, modeling and simulations, and bioinformatics.


Le Cai (PhD 2006). Thesis: Joint Power Management of Memory and Disk

Le graduated in Spring 2006 with a Ph.D. in Electrical and Computer Engineering. His research focused on joint power management of memory and disk. Le currently works at IBM in San Jose, CA.