Alex Gray
Alexander Gray
Machine learning, artificial intelligence, data mining
Computational mathematics for massive datasets
Challenge applications
After completing Bachelor's degrees in Applied Mathematics (concentration in Computational Statistics) and Computer Science from UC Berkeley, spending summers at the Santa Fe Institute and Los Alamos National Laboratory, among other places, I worked in the Machine Learning Systems Group of NASA's Jet Propulsion Laboratory, then completed my PhD in Computer Science and a postdoc at Carnegie Mellon University supervised by Prof. Andrew Moore. Since August 2005 I've been an Assistant Professor in the College of Computing at Georgia Tech, within the new Interactive and Intelligent Computing Division and affiliated with the even newer Computational Science and Engineering Division. I'm a member of the Center for the Study of Systems Biology, Center for Robotics and Intelligent Machines, Center for Experimental Research in Computer Systems, and the Graphics, Visualization and Usability Center, and affiliated with the The Industrial and Technology Statistics Center.
Caffe Strada, Berkeley Los Alamos National Laboratory Mars rovers at the JPL Spacecraft Assembly Facility Newell-Simon Hall atrium, CMU
agray @ cc.gatech.edu
240 TSRB
85 5th St. NW
Atlanta, GA 30318
(404) 894-6328
fax (404) 894-0673
C.V. [pdf] [ps]
My work focuses on developing the new statistical and computational foundations demanded by next-generation challenges in data analysis. Two challenges which keep increasing in importance and ubiquity are massive datasets and various curses of dimensionality. I have been concerned with computational strategies for dealing with the fundamental summations, integrals, and maximizations at the root of a wide variety of statistics and machine learning methods. A second thread of my research, in progress, concerns statistical theory for some practical open problems in machine learning. A third thread concerns meta-methods, or methods for making new methods, both statistical and algorithmic.
New/recent stuff!
Fall 08 graduate course: Computational Data Analysis: Foundations of Machine Learning and Data Mining.
Fall 2006 undergraduate course: Constructing Proofs.
To appear in UAI 2006, Jul 06: Faster Gaussian Summation: Theory and Experiment [pdf], [ps].
I'm currently on the Program Committees for ICML 06, to be held in Pittsburgh, and KDD 06, to be held in Philadelphia.
I'll be hosting a visit by Bill Cleveland, who will give a CSE Distinguished Lecture on 3/15/05.
I hosted a visit by Jeff Racine, who gave a talk on Recent Developments in Kernel Smoothing with Both Categorical and Continuous Data on 11/8/05.
To appear in NIPS 2005, Dec 05: Dual-tree Fast Gauss Transforms [pdf], [ps].
Talk at Oxford University, PhyStat 2005 Sep 05.
Cosmic magnification result featured in Nature, April 27, 2005.


Nature's most beautiful data structure
Generalized N-body Methods
Fast kernel density estimation
Fast n-point correlation functions
Fast all-nearest-neighbors
Fast Gaussian process regression
Fast nonparametric Bayes classification
CDM simulation
Saturn
Computational Astrophysics, Cosmology, Astronomy
Evidence for dark energy
The origin of galaxies
Quasar mapping
Large-scale structure of the universe
Galaxy morphologies and clusters
Buckyball
Computational Chemistry, Drug Discovery, Biology
Molecule ranking for virtual screening
Microarray data analysis
Two discrete random variate generators
Adaptive Monte Carlo Methods
Multi-tree Monte Carlo
High-dimensional integration without Markov chains
Proximity Search
The Proximity Project
Fast nearest-neighbor classification
Fast approximate nearest-neighbor
Tutorial: Data Structures for Fast Statistics
Voyager near moon of Jupiter
Advanced Systems
Autonomous planetary science by rover teams
Efficient computer systems
The changing constant
Derivation of Learning Algorithms
Automatic derivation of new EM algorithms

Other pursuits...