Search Results for author: Samuel Assefa

Found 7 papers, 0 papers with code

Tradeoffs in Streaming Binary Classification under Limited Inspection Resources

no code implementations5 Oct 2021 Parisa Hassanzadeh, Danial Dervovic, Samuel Assefa, Prashant Reddy, Manuela Veloso

Institutions are increasingly relying on machine learning models to identify and alert on abnormal events, such as fraud, cyber attacks and system failures.

Binary Classification Classification +1

Copula Flows for Synthetic Data Generation

no code implementations3 Jan 2021 Sanket Kamthe, Samuel Assefa, Marc Deisenroth

Learning the probabilistic model for the data is equivalent to estimating the density of the data.

Density Estimation Normalising Flows +1

SURF: Improving classifiers in production by learning from busy and noisy end users

no code implementations12 Oct 2020 Joshua Lockhart, Samuel Assefa, Ayham Alajdad, Andrew Alexander, Tucker Balch, Manuela Veloso

We show that conventional crowdsourcing algorithms struggle in this user feedback setting, and present a new algorithm, SURF, that can cope with this non-response ambiguity.

Some people aren't worth listening to: periodically retraining classifiers with feedback from a team of end users

no code implementations27 Apr 2020 Joshua Lockhart, Samuel Assefa, Tucker Balch, Manuela Veloso

Document classification is ubiquitous in a business setting, but often the end users of a classifier are engaged in an ongoing feedback-retrain loop with the team that maintain it.

Document Classification

On the Importance of Opponent Modeling in Auction Markets

no code implementations28 Nov 2019 Mahmoud Mahfouz, Angelos Filos, Cyrine Chtourou, Joshua Lockhart, Samuel Assefa, Manuela Veloso, Danilo Mandic, Tucker Balch

The dynamics of financial markets are driven by the interactions between participants, as well as the trading mechanisms and regulatory frameworks that govern these interactions.

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