Columbia University
Projects
Congestion Control and Transport
Models and mechanisms for congestion control: fluid models of TCP and Active Queue Management, feedback and delay, and modern data-center transport.
DDoS Defense and Overlay Networks
Keeping services reachable under attack: secure overlay architectures (SOS, WebSOS, MOVE) and other defenses against distributed denial-of-service.
Network Neutrality and Internet Economics
How networks should be paid for: the economics of interconnection, ISP settlement, network neutrality, and zero-rating. Reframes policy disputes as questions of who pays whom, using cooperative game theory and market models.
Quantum Computation and Networking
Foundations for quantum computation and resilience, and applying quantum computing to classical networking problems such as network verification.
Synthetic Control and Causal Inference
Estimating what would have happened otherwise: robust and differentially private synthetic control, donor selection, and applications in policy and medicine.
The Theory of Large Language Models
A Bayesian account of how large language models learn: in-context learning as inference on a latent manifold, and the geometry of attention.