Conference PaperTiFL: A Tier-based Federated Learning SystemChai, Zheng; Ali, Ahsan; Zawad, Syed; Truex, Stacey; Anwar, Ali; Baracaldo, Nathalie; Zhou, Yi; Ludwig, Heiko; Yan, Feng; Cheng, Yue2020-06-2310166694Proceedings of the 29th International Symposium on High-Performance Parallel and Distributed Computing (HPDC 20)125 to 136https://doi.org/10.1145/3369583.33926861756013; 1838024; 1919075; 1919113National Science Foundation