Jiacheng Liu is a Ph.D. candidate in the Smart Computer Interfaces for Future Interactions (SciFi) Lab (https://www.scifilab.org) at Cornell University, advised by Prof. Cheng Zhang (https://czhang.org). His research focuses on designing wearable sensing and interactive systems that enable unobtrusive and seamless human-computer interaction. Before joining Cornell, he received his Bachelor of Engineering degree from Tsinghua University.