Accepted Papers Delayed-Dynamic-Selective (DDS) Prediction for Reducing Extreme Tail Latency in Web Search Saehoon Kim (POSTECH) Yuxiong He (Microsoft Research) Seung-won Hwang (POSTECH) Sameh Elnikety (Microsoft Research) Seungjin Choi (POSTECH) MergeRUCB: A Method for Large-Scale Online Ranker Evaluation Masrour Zoghi (University of Amsterdam) Shimon Whiteson (University of Amsterdam) Maarten de