Current Team

Sunghoon Ivan Lee, PhD

Principal Investigator

Ivan Lee is an Assistant Professor in the College of Information and Computer Sciences, Adjunct Assistant Professor in the Department of Electrical and Computer Engineering, and Adjunct Assistant Professor in the Department of Biomedical Engineering at UMass Amherst. He received his PhD in Computer Science (with Outstanding Research Award), MS in Computer Science, and MS in Electrical Engineering, all from the University of California Los Angeles in 2010, 2013, and 2014, respectively. From 2014 to 2016, he was a post-doctoral fellow in the Department of Physical Medicine & Rehabilitation at Harvard Medical School.

Ivan is a recipient of the NSF CRII Award (2018) and the NIH Trailblazer Award for Young Investigators (2018). His work has won a number of featured article awards, best paper awards, best demo awards, and runner-ups at premier academic venues including IEEE TNSRE, JBHI, ACM SenSys, and ACM MobiSys.  He is currently an Associate Editor of PLOS ONE, IEEE OJEMB, and ACM HEALTH. He is also serving as a Technical Committee Member on Wearable Biomedical Sensors and System of the IEEE Engineering in Medicine and Biology Society (EMBS), and a Steering Committee Member of the Center for Personalized Health Monitoring at the Institute of Applied Life Sciences of UMass Amherst. Ivan has served as a technical program committee member and workshop chair for several flagship conferences in the area of wearable computing and health informatics. Ivan also frequently serves on scientific review panels for funding agencies such as the NSF and NIH.

Curriculum Vitae, updated 5/6/2021

Hee-Tae Jung, PhD

Post-Doctoral Researcher

Hee-Tae Jung is a post-doctoral researcher in the AHHA lab. He received his BS from Yonsei University, MS from Stanford University, and Ph.D. from UMass Amherst, all in Computer Science. He takes a holistic, end-to-end research approach with an essential goal of maximizing the overall quality of the rehabilitation service through technology-assisted therapies. Towards that end, he specifically focuses on three paths. 1) He investigates various ways to use artificial intelligence to rehabilitate patients and monitor their impairments/progress. 2) In a human-computer interaction perspective, he attempts to analyze the interaction dynamics of users during technology-assisted therapies in the real-world setting and to understand the room to advance the contemporary state-of-the-art rehabilitation technology. 3) He conducts clinical studies to understand the therapeutic benefit of technology-assisted therapies in routine clinical settings.
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Brandon Oubre

PhD Candidate

Brandon is a PhD candidate who joined the AHHA lab in 2017. He received his MS in computer science from UMass Amherst and has been awarded the Barry M. Goldwater Scholarship and an NSF GRFP Honorable Mention. Brandon is interested in the practical applications of machine learning and wearable sensing technology with regard to monitoring and improving human health. His research currently focuses on analyzing human motion in diseased populations (including stroke, parkinsonsism, ataxia, and knee osteoarthritis). His research goal is to develop technologies that can unobtrusively and remotely measure real-world motor performance in order to enable data-driven and patient-centered care.

Juhyeon Lee

PhD Student

Juhyeon is a first-year Ph.D. student in Computer Science. She joined the AHHA Lab in 2019. Her research interest is applying machine learning techniques to health data to improve the mobile health system. Before joining the lab, she worked as a research engineer at Robotics Lab, LG Electronics. She received the M.S. degree from KAIST and the B.S. degree from Ewha Womans University both in Electrical Engineering.

Yunda Liu

PhD Student

Yunda Liu is a first-year Ph.D. student in Computer Science who joined the AHHA Lab in 2019. His research interests include the applications of machine learning in the area of human health in order to make positive clinical impact. He received both his MS degree and BS degree in Computer Science from South China University of Technology.

Noor Mohammed

PhD Student

Noor Mohammed is a first year MS/PhD student who joined the AHHA lab in 2020. He previously received his MS degree in Biomedical Engineering from Wichita State University where he worked towards developing novel electromagnetic near-field epidermal decoder for biofluid phenomena detection inside human body which was funded by NASA. He also received his MS degree in Biomedical Physics and Technology from University of Dhaka and BS degrees in Mechanical engineering from Bangladesh University of Engineering and Technology- the highest echelons of engineering and science educational institutions in Bangladesh. Noor is interested in the multidisciplinary field of bioelectronics which involves practical applications of sophisticated RF electronics, computational modeling, and embedded hardware development. At present, his research is aiming towards the development of novel intrabody power and communication technology for true wearable batteryless body sensor network. His research goal is to introduce new genre of wearable devices where electronics and human will dwell under synchronized symbiosis which he terms as “Symphony of Symbiotronics”. During his respite, he loves to hike, playing guitar, and photography.

Charles Cao

Incoming PhD Student

Charles Cao is an undergraduate research assistant who joined the AHHA lab in 2020. He will join the lab as an MS/PhD student in Fall 2021. Charles is currently pursuing a Computer Science BS degree and a Mathematics BS degree at the University of Massachusetts, Amherst. He has also been working at Stratasys, Ltd., an industrial leading 3D-printing company, as a software engineer internship for more than two years. His research interests include designing embedded digital circuits and implementing embedded firmware, which will help people to enhance their life and health. Charles is currently working on battery-less intra-body power transferring sensor networks. As for hobbies, Charles loves coding for interesting projects.


  • Hee-Tae Jung (PhD’19 in Computer Science) – Currently a Postdoctoral Researcher at the University of Massachusetts Amherst.
  • Kallie Whritenour (MS’19 in Computer Science) – Currently a PhD student at the University of Virginia.
  • Xin Liu  (BS’18 in Computer Science) – Currently a PhD student at University of Washington. Email • Web • LinkedIn
  • Youngkyun Kim (BS’18 in Computer Science) – Currently a software engineer at Amazon, Seattle. Email • Github
  • Smita Rajan (BS’18 in Microbiology) – Currently a MD student at the Medical School of the St. George’s University. Email