![]() |
Can One Hear the Shape of a Trend? (aka Music of the (Twitter)Spheres) I sonified the process of a topic spreading from person to person on Twitter. The resulting notes represent the natural frequencies that characterize the “shape” of the evolving network of users participating in a topic. |
![]() |
Information Diffusion on Twitter I tracked and visualized how topics spread on Twitter implicitly from person to person by using the timing of the tweets and the follow graph. |
![]() |
Control of Underactuated Vehicular Traffic
When self-driving robotic cars begin to share the road with regular cars, could we control the robotic cars to smooth out traffic jams? I did a numerical and theoretical study of vehicle traffic dynamics and control policies that smooth traffic even when controlling only a fraction of the vehicles. |
![]() |
Structure Formation in Microtubule Networks Large-scale simulation of axonal microtubule network structure formation. Got to play wiht Monte-Carlo methods, sampling algorithms, large-scale collision detection, and network visualization. |
![]() |
Principal Component Landscapes Renderings of principal components handwritten ‘2’s as landscapes |
![]() |
MASLAB (MIT Mobile Autonomous Vision-Based Robotics Competition) |
![]() |
Cortical Learning Algorithms at Numenta I worked on Numenta’s Cortical Learning Algorithms. Prototyped and evaluated machine learning algorithms based on the structure and function of the neocortex, specifically online unsupevised visual feature learning, and wrote a system for interactive 3D visualization of experiment runs. |
![]() |
A Nonparametric Method for Early Detection of Twitter Trends |
![]() |
Semi-Supervised Shape Classification with Manifold Regularization Shape classification using manifold regularization. |
![]() |
Probabilistic Model of Signal Onset Detection Statistical simulations of signal onset detection in the presence of noise. Modeled detection as a random walk with drift crossing a threshold. Model explained two paradoxes in the human time perception literature. |
![]() |
Computer Graphics and Animation Engine 3D computer graphics and animation engine in Java from scratch. Line drawing, curve and mesh generation, lighting and shading, ray-tracing, a hierarchical scene-graph and motion description language, and tooling to create scenes and animations. |
![]() |
Recommending Charitable Action In Response to News Recommendation system to match news stories with relevant opportunities for donation or volunteering. Text parsing, stemming, part-of-speech tagging. Cosine similarity. Bayesian inference to parse news article text from raw HTML. Prototype helped secure a round of angel funding. |
Publications
-
2010
- Probabilistic Model of Onset Detection Explains Paradoxes in Human Time Perception. With Hakwan Lau, Dobromir Rahnev. Frontiers in Psychology. 1:37 2010.
Conferences
-
2013
- A Latent Source Model for Nonparametric Time Series Classification. With George H. Chen and Devavrat Shah. Neural Information Processing Systems (NIPS) 2013. (to appear)
-
2012
- A Nonparametric Method for Early Detection of Trending Topics. With Devavrat Shah. Workshop on Information and Decision in Social Networks 2012.
-
2010
- Integrative image analysis of Drosophila in-situ hybridization data (Poster). With Anna Ayuso, Christopher A. Bristow, Charlie Frogner, Manolis Kellis, Tom Morgan, Tomaso Poggio, Lorenzo Rosasco. 2010 CSHL Meetiing on Automated Imaging and High-Throughput Phenotyping.
-
2009
- Signal Detection-Theoretic Model Explains Libet’s Awareness of Intention and Attentional Prior Entry (Poster). With Matthew Davidson, Tashina Graves, Hakwan Lau, Dobromir Rahnev. ASSC 13. 2009.
Talks
-
2013
- Implicit Information Diffusion Networks on Twitter. INFORMS 2013. Session on Models of Information Diffusion in Social Networks. (Invited)
- Implicit Information Diffusion Networks on Twitter. INFORMS 2013. Session on Models of Information Diffusion in Social Networks. (Invited)
- 2012
- A Nonparametric Method for Early Detection of Trending Topics. (Joint work with Devavrat Shah). Workshop on Information and Decision in Social Networks 2012. November 9, 2012 at MIT.
- Information Diffusion on Twitter. Guest lecture for the course Analyzing Big Data with Twitter at the UC Berkeley School of Information. October 25, 2012 at UC Berkeley.
Thesis
- Trend or No Trend: A Novel Nonparametric Method for Classifying Timeseries. MEng Thesis, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology. 2012.