I work on the Siri WebAnswers team. We are an NLP-oriented R&D team. Our goal is to provide fast and direct answers to the questions people ask their devices.
If you are interested in training and deploying ML models for a user-facing product, we are hiring!
Prior to Apple, I was a Senior Data Scientist at Turi (a startup formerly known as Dato and GraphLab). I helped build the NLP and recommender system toolkits for Turi Create.
During graduate school, I focused on probabilistic models for relational events, e.g., communication or interaction within a social network. I obtained a Ph.D. from the Department of Statistics at University of California, Irvine, working with Padhraic Smyth and the DataLab. I also had the opportunity to do research internships at Google Research NY (with Daryl Pregibon) and Microsoft Research (with Chris Meek).
Research
Recent
An Exploration of Data Augmentation and Sampling Techniques for Domain-Agnostic Question Answering
Shayne Longpre, Yi Lu, Zhucheng Tu, Chris DuBois
2nd Workshop on Machine Reading for Question Answering (co-located with ACL) [paper]
Collaborative denoising auto-encoders for top-n recommender systems
Yao Wu, Christopher DuBois, Alice X Zheng, Martin Ester
Proceedings of the Ninth ACM International Conference on Web Search and Data Mining [paper]
Previous
Approximate Slice Sampling for Bayesian Posterior Inference
Christopher DuBois, Anoop Korattikara, Max Welling, Padhraic Smyth
AI STATS 2014 [paper]
Stochastic Collapsed Variational Bayesian Inference for Latent Dirichlet Allocation
James Foulds, Levi Boyles, Christopher DuBois, Max Welling, Padhraic Smyth
KDD 2013 [paper]
Stochastic blockmodeling of relational event dynamics
Christopher DuBois, Carter Butts, Padhraic Smyth
AI STATS 2013 [paper]
Windows into Relational Events: Data Structures for Contiguous Subsequences of Edges
Michael J. Bannister, Christopher DuBois, David Eppstein, Padhraic Smyth
SODA 2013 [paper]
Waiting for a retweet: modeling waiting times in information propagation
Emma Spiro, Christopher DuBois, Carter Butts
NIPS 2012 Workshop on Social Media and Social Networks [paper]
Statistical Models for Exploring Individual Email Communication Behavior
Nicholas Navaroli, Christopher DuBois, Padhraic Smyth
ACML 2012 (JMLR workshop) [paper]
Hierarchical Models for Relational Event Sequences
Christopher DuBois, Carter T. Butts, Daniel McFarland, Padhraic Smyth
Journal of Mathematical Psychology [paper]
Latent Set Models for Two-Mode Network Data
Christopher DuBois, James Foulds, Padhraic Smythh
Fifth International AAAI Conference on Weblogs and Social Media (2011) [paper]
A multiple time-scale computational model of a tumor and its micro environment
Christopher DuBois, Farnham J, Aaron E, Radunskaya A.
Mathematical Biosciences and Engineering, Vol.10 [paper]