Dimitrios Diochnos

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Dimitrios Diochnos

Associate Professor

Email: diochnos@ou.edu
Phone: (405) 325-2978
Office: Devon Energy Hall Room 230

Website: www.diochnos.com

Education
Ph.D., Mathematics
University of Illinois at Chicago

MS, Mathematics
University of Athens

BS, Informatics and Telecommunications
University of Athens

Research Focus

Supervised Learning
Semi-Supervised Learning
Adversarial Learning
Imbalanced Data
Randomized Search Heuristics

Experience and Awards

Associate Professor, University of Oklahoma, 2026-now.
Assistant Professor, University of Oklahoma, 2019-2026.
Hobby Postdoctoral Research Associate, University of Virginia, 2015-2019.
Postdoctoral Research Associate, University of Edinburgh, 2013-2015.
Managing Associate Editor, Annals of Mathematics and Artificial Intelligence (AMAI), 2024.
Associate Editor, Annals of Mathematics and Artificial Intelligence (AMAI), 2022-now.
Area Chair: NeurIPS 2024–2026.
Program Committee: NeurIPS 2019–2023, ICML 2020–2026, CVPR 2024, AAAI 2018, 2021–2026, IJCAI 2016, 2017, 2019, ECAI 2023, 2025, AAMAS 2021, 2022, NLDL 2025–2027, SETN 2026, ISAIM 2016-2024 (biennial), CAI 2024, CEC 2023, WCCI 2022, ACMSE 2021–2024, 2027, TAPIA 2022.
Regular Reviewer for Journal: TMLR 2022–now.
NSF Reviewer 2022.
Program Chair (co-Chair with Dr. Jörg Rothe): ISAIM 2026.
Publicity Chair: ISAIM 2012–2024.
Organizing Committee: Symposium on AI & ML at OU 2019, 2020.
Webmaster: Workshop on Graph Theory & Combinatorics in Memory of Uri Peled, UIC, 2010. Also at ISAIM 2012–2024 (biennial).
Scientific Committee: International Olympiad in Informatics 2004.
NeurIPS 2023 Top Reviewers.
NeurIPS 2019 Top Reviewers.
IJCAI-16 Quality Reviewing.
Hobby Postdoctoral Research Fellowship, University of Virginia, 2015 - 2019.
Teaching Award, Fall 2009, MCS 260 - Introduction to Computer Science.
Chancellor's Graduate Research Fellowship, University of Illinois at Chicago, 2010 & 2011.
Fellowship for Undergraduate Studies, Zossima Brothers Foundation, 1998 - 2003.

Biography

Dr. Dimitrios Diochnos is an associate professor with tenure in the School of Computer Science at the University of Oklahoma (OU). Prior to joining OU in 2019, he worked as a Hobby postdoctoral research fellow at the Department of Computer Science of the University of Virginia. Earlier he held a research associate position at the University of Edinburgh. He received his PhD degree from the Department of Mathematics, Statistics, and Computer Science at the University of Illinois at Chicago. He received his MS degree from the Department of Mathematics at the University of Athens, Greece. He received his BS degree from the Department of Informatics and Telecommunications at the University of Athens, Greece.

Dr. Diochnos is primarily interested in the design and analysis of machine learning algorithms with rigorous guarantees in the contexts of supervised learning, semi-supervised learning, adversarial learning, imbalanced data, streaming data, open-world learning, and randomized search heuristics. Dr. Diochnos is currently working on semi-supervised learning techniques, online/streaming learning, and on theoretical foundations of imbalanced classification problems. In the past Dr. Diochnos has also worked in reasoning with knowledge bases, evolvability, as well as in symbolic computation.

The work of Dr. Diochnos has appeared in top conferences such as NeurIPS, ALT, AAAI, ECAI, SDM, ICMLA, FUN, and EuroGP, or top journals such as the Journal of Artificial Intelligence Research (JAIR), the Annals of Mathematics and Artificial Intelligence (AMAI), Information Processing Letters (IPL), and the Journal of Symbolic Computation (JSC).

Dr. Diochnos has served as a member of the program committee in major artificial intelligence venues such as NeurIPS, ICML, AAAI, IJCAI, and ECAI. Dr. Diochnos has also provided continued service in the community around the biennial International Symposium on Artificial Intelligence and Mathematics (ISAIM). Between 2012-2024 he served as the publicity chair for ISAIM. For ISAIM 2026 he served as the Program Co-Chair together with Dr. Jörg Rothe. Since 2022 he is serving as an Associate Editor in the journal Annals of Mathematics and Artificial Intelligence (AMAI), where during the calendar year of 2024 he also served as Managing Associate Editor on the same journal. Dr. Diochnos has served as a guest co-editor in AMAI special issues devoted to ISAIM 2018 and ISAIM 2022. Finally, Dr. Diochnos has also served as a member of the international scientific committee for the International Olympiad in Informatics that was held in Athens (Greece) in 2004.

Selected Projects

NSF Award CNS-2531450 "SCC-IRG: TREE-CARE: Treefall Risk Evaluation and Empowerment for Community Assessment and Resilience Enhancement," Co-PI (PI: Aikaterini Kyprioti, Co-PIs: Heather McCarthy, Andrew Fox, Dimitrios Diochnos, Christopher Malloy), 2025–2029. Total budget: $1,199,990. DID Credit: $143,999.
NSF Award ICER-2019758 "AI Institute: Artificial Intelligence for Environmental Sciences (AI2ES)," Senior Personnel (Lead PI: Amy McGovern, PIs: Philippe Tissot, Christopher Thorncroft, Ruoying He, Imme Ebert-Uphoff), 2020–2025; extended to 2026. Total budget: $20,000,000. OU Credit: $4,000,000. DID Credit: $400,000.

Selected Publications

Pantia-Marina Alchirch, Dimitrios I. Diochnos. On Imbalanced Regression with Hoeﬀding Trees. Pacific-Asia Knowledge Discovery and Data Mining (PAKDD) 2026, special session on Data Science: Foundations and Applications (DSFA), 2026.
Patrick Kage, Jay C. Rothenberger, Pavlos Andreadis, Dimitrios I. Diochnos. A Review of Pseudo-Labeling for Computer Vision. Journal of Artificial Intelligence Research (JAIR), 2026.
Erencem Özbey and Dimitrios I. Diochnos. Dimensionally Reduced Open-World Clustering: DROWCULA. Thirty-Eighth Australasian Joint Conference on Artificial Intelligence (AJCAI) 2025.
Jay C. Rothenberger and Dimitrios I. Diochnos. Meta Co-Training: Two Views are Better than One. Twenty-Eighth European Conference on Artificial Intelligence (ECAI) 2025, ECAI 2025: 3355-3362.
Amy McGovern, Imme Ebert-Uphoff, Elizabeth A. Barnes, Ann Bostrom, Mariana G. Cains, Phillip Davis, Julie L. Demuth, Dimitrios I. Diochnos, Andrew H. Fagg, Philippe Tissot, John K. Williams, Christopher D. Wirz. AI2ES: The NSF AI Institute for Research on Trustworthy AI for Weather, Climate, and Coastal Oceanography. AI Magazine 45(1): 105-110, 2024.
Conner Flansburg, Dimitrios I. Diochnos. Wind Prediction under Random Data Corruption (Student Abstract). 36th AAAI Conference on Artificial Intelligence (AAAI), Online: 12945-12946, 2022.
Pantia-Marina Alchirch, Dimitrios I. Diochnos, Katia Papakonstantinopoulou. Evolving Monotone Conjunctions in Regimes Beyond Proved Convergence. 25th European Conference on Genetic Programming (EuroGP): 228-244, 2022.
Dimitrios I. Diochnos. On the Evolvability of Monotone Conjunctions with an Evolutionary Mutation Mechanism. Journal of Artificial Intelligence Research (JAIR) 70: 891-921, 2021.
Dimitrios I. Diochnos, Theodore B. Trafalis. Learning Reliable Rules under Class Imbalance. SIAM International Conference on Data Mining (SDM), Online, 2021: 28-36, 2021.
Saeed Mahloujifar, Dimitrios I. Diochnos, Mohammad Mahmoody. Curse of Concentration in Robust Learning: Evasion and Poisoning Attacks from Concentration of Measure. 33rd AAAI Conference on Artificial Intelligence (AAAI), Honolulu, Hawaii, USA, AAAI 2019: 4536-4543, 2019.
Dimitrios I. Diochnos, Saeed Mahloujifar, Mohammad Mahmoody. Adversarial Risk and Robustness: General Definitions and Implications for the Uniform Distribution. 32nd Conference on Neural Information Processing Systems (NeurIPS), Montréal, Canada, NeurIPS 2018: 10380-10389, 2018.
Saeed Mahloujifar, Dimitrios I. Diochnos, Mohammad Mahmoody. Learning under p-Tampering Attacks. 29th International Conference on Algorithmic Learning Theory (ALT), Lanzarote, Spain, ALT 2018: 572-596, 2018.
Dimitrios I. Diochnos. On the Evolution of Monotone Conjunctions: Drilling for Best Approximations. 27th International Conference on Algorithmic Learning Theory (ALT), Bari, Italy, ALT 2016: 98-112, 2016.
Dimitrios I. Diochnos, Robert H. Sloan, György Turán. On multiple-instance learning of halfspaces. Information Processing Letters, 112(23): 933–936, 2012.
Dimitrios I. Diochnos. Leveling-Up in Heroes of Might and Magic III. 5th International Conference on Fun with Algorithms (FUN), Ischia Island, Italy, FUN 2010: 145–155, 2010.
Dimitrios I. Diochnos and György Turán. On Evolvability: The Swapping Algorithm, Product Distributions, and Covariance. 5th Symposium on Stochastic Algorithms, Foundations and Applications (SAGA), Sapporo, Japan, SAGA 2009: 74–88, 2009.
Dimitrios I. Diochnos, Ioannis Z. Emiris, Elias P. Tsigaridas. On the asymptotic and practical complexity of solving bivariate systems over the reals. Journal of Symbolic Computation, 44(7): 818–835, 2009.