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Publishing Asynchronous Event Times with Pufferfish Privacy
Uses pufferfish privacy framework to publish time-stamps of point events and answer accurate interval queries.
Jiaxin Ding, Abhirup Ghosh, Rik Sarkar, Jie Gao
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Differentially Private Range Counting in Planar Graphs for Spatial Sensing
Proposes a private and efficient data structure to answer range queries along paths in a planar graph.
Abhirup Ghosh, Jiaxin Ding, Rik Sarkar, Jie Gao
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Topological Signatures For Fast Mobility Analysis
An efficient framework to map GPS trajectories to Euclidean vectors using differential topology. This enables Euclidean machine learning tools for the trajectories.
Abhirup Ghosh, Benedek Rozemberczki, Subramanian Ramamoorthy, Rik Sarkar
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Finding Periodic Discrete Events in Noisy Streams
Particle filter-based periodicity detection method for signals with drifting phase, changing periodicity, and false-positive events.
Abhirup Ghosh, Christopher Lucas, Rik Sarkar
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