I am a research scientist at MediaMath in Cambridge, MA, USA.
I have moved to MediaMath from Akamai Technologies following the acquisition of Akamai's advertising business.
Previously I did a postdoc at NEC Labs. My manager at NEC was Vladimir Vapnik. I obtained my Ph.D. from the Technion My thesis advisor was Prof. Ran El-Yaniv.
I also did M.Sc. at the School of Computer Science at Tel-Aviv University, under the supervision of Prof. Amos Fiat.
Statistical and computational machine learning, computational advertising, data mining, information retrieval
Y. Wang, R. Khardon, D. Pechyony and R. Jones. Generalization Bounds for Online Learning Algorithms with Pairwise Loss Functions. COLT 2012.
D. Pechyony, L. Shen and R. Jones. Solving Large Scale Linear SVM with Distributed Block Minimization. NIPS 2011 workshop on Big Learning: Algorithms, Systems, and Tools for Learning at Scale.
D. Pechyony, R. Izmailov, A. Vashist and V. Vapnik. SMO-style Algorithms for Learning using Privileged Information . DMIN 2010. Best Academic Research Paper Award.
R. El-Yaniv, D. Pechyony and V. Vapnik. Large Margin vs. Large Volume in Transductive Learning. ECML 2008 and the special issue of Machine Learning Journal, 72(3):173-188, 2008.
R. El-Yaniv, D. Pechyony and E. Yom-Tov. Superior Multiclass Classification Through Margin-Optimized Single Binary Problem. Pattern Recognition Letters, 29(14):1954-1959, 2008.
R. Begleiter, R. El-Yaniv and D. Pechyony. Repairing Self-Confident Active Transductive Learners using Systematic Exploration. Pattern Recognition Letters, 29(9):1245-1251, 2008.
R. El-Yaniv and D. Pechyony.
Transductive Rademacher Complexity and its Applications. COLT 2007
Proceedings version. Full version,
Journal of Artificial Intelligence Research, 35:193-234, 2009.
Video (from Machine Learning Summer School).
Theory and Practice of Transductive Learning. PhD Thesis. Advisor: Prof. Ran El-Yaniv. Technion, 2008.
Decision Trees: More Theoretical Justification for Practical Algorithms. MSc Thesis. Advisor: Prof. Amos Fiat. Tel -Aviv University, 2004.
Email: dpechyoni at mediamath dot com, pechyony at gmail dot com