Özgür Şimşek

Ph.D. Candidate
Department of Computer Science
University of Massachusetts Amherst
ozgur [at] cs [dot] umass [dot] edu

PUBLICATIONS   [by type]

2008

Özgür Şimşek and Andrew G. Barto
Skill characterization based on betweenness
22nd Annual Conference on Neural Information Processing Systems (NIPS), to appear

Özgür Şimşek and David Jensen
Navigating networks by using homophily and degree
Proceedings of the National Academy of Sciences, 105(35), 12758–12762, 2008
[pdf]

2007

Özgür Şimşek and Andrew G. Barto
Betweenness centrality as a basis for forming skills
University of Massachusetts, Department of Computer Science, Technical Report TR-2007-26, 2007
[pdf]

2006

Özgür Şimşek and Andrew G. Barto
An intrinsic reward mechanism for efficient exploration
23rd International Conference on Machine Learning (ICML), 2006
[pdf] [bibtex] [abstract]

2005

Özgür Şimşek and David Jensen
Decentralized search in networks using homophily and degree disparity
19th International Joint Conference on Artificial Intelligence (IJCAI), 2005
[pdf] [bibtex] [abstract]

Andrew G. Barto and Özgür Şimşek
Intrinsic motivation for reinforcement learning systems
13th Yale Workshop on Adaptive and Learning Systems, 2005
[pdf] [bibtex] [abstract]

Özgür Şimşek, Alicia P. Wolfe, Andrew G. Barto
Identifying useful subgoals in reinforcement learning by local graph partitioning
22nd International Conference on Machine Learning (ICML), 2005
[pdf] [bibtex] [abstract]

Jennifer Neville, Özgür Şimşek, David Jensen, John Komoroske, Kelly Palmer, Henry Goldberg
Using relational knowledge discovery to prevent securities fraud
11th International Conference on Knowledge Discovery and Data Mining (KDD), 2005
[pdf] [bibtex] [abstract]

Özgür Şimşek
Towards competence in autonomous agents
20th National Conference on Artificial Intelligence (AAAI), 2005
(Doctoral Symposium)

Konstantinos V. Katsikopoulos and Özgür Şimşek
Optimal doubling strategy against a sub-optimal opponent
Journal of Applied Probability 42(3), pp. 867–872, 2005.
[pdf] [abstract]

2004

Özgür Şimşek and Andrew G. Barto
Using relative novelty to identify useful temporal abstractions in reinforcement learning
21st International Conference on Machine Learning (ICML), 2004
[ps] [pdf] [bibtex] [abstract]

Özgür Şimşek, Alicia P. Wolfe, Andrew G. Barto
Local graph partitioning as a basis for generating temporally-extended actions in reinforcement learning
AAAI Workshop on Learning and Planning in Markov Processes—Advances and Challenges, 2004.
[ps] [pdf] [bibtex] [abstract]

Jennifer Neville, Özgür Şimşek, David Jensen
Autocorrelation and relational learning: Challenges and opportunities
ICML Workshop on Statistical Relational Learning, 2004
[ps] [pdf] [bibtex] [abstract]

2002

Alvah C. Bittner, Jr., Özgür Şimşek, William H. Levison, John L. Campbell
On-road vs. simulator data in driver model development: Driver Performance Model experience
Transportation Research Record 1803, pp. 38–44, 2002
[abstract]

2001

William H. Levison, Özgür Şimşek, Alvah C. Bittner, Jr., S. J. Hunn
Computational techniques used in the Driver Performance Model of the Interactive Highway Safety Design Model
Transportation Research Record 1779, pp. 17–25, 2001
[abstract]

Barry H. Kantowitz and Özgür Şimşek
Secondary-task measures of driver workload
In Peter A. Hancock and Paula A. Desmond (Eds.), Stress, workload, and fatigue, 2001, pp. 395–408. Mahwah, NJ: Lawrence Erlbaum Associates

2000

Alvah C. Bittner, Jr. and Özgür Şimşek
Simulator validation: Methods and illustrations
International Symposium on Automotive Technology and Automation (ISATA)—Simulation and Virtual Reality, 2000, pp.63-69. Epson, UK: Epson House