BILBO co-author Ruth Chew leaves Singapore DSO for UW PhD in CSE

PangWeiKoh · x · 2026-09-16

Bryan Klow shares a farewell for researcher Ruth Chew, who is heading to the University of Washington for a CS PhD. Chew's master's thesis with Klow led to BILBO, a bilevel Bayesian optimization algorithm published at ICML 2025 that optimizes upper- and lower-level problems simultaneously with sublinear regret guarantees. She also led work on a benchmark democratizing black-box optimization research for expensive LLM tasks.

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