Christos Dimitrakakis
Senior Researcher at
Data Science
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) --- End of inner exception stack trace --- at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.TlsStream.CallProcessAuthentication(Object state) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) --- End of inner exception stack trace --- at System.Net.HttpWebRequest.GetResponse() at HtmlAgilityPack.HtmlWeb.Get(Uri uri, String method, String path, HtmlDocument doc, IWebProxy proxy, ICredentials creds) in d:\Source\htmlagilitypack.new\Trunk\HtmlAgilityPack\HtmlWeb.cs:line 1355 at HtmlAgilityPack.HtmlWeb.LoadUrl(Uri uri, String method, WebProxy proxy, NetworkCredential creds) in d:\Source\htmlagilitypack.new\Trunk\HtmlAgilityPack\HtmlWeb.cs:line 1479 at HtmlAgilityPack.HtmlWeb.Load(String url, String method) in d:\Source\htmlagilitypack.new\Trunk\HtmlAgilityPack\HtmlWeb.cs:line 1103 at HtmlAgilityPack.HtmlWeb.Load(String url) in d:\Source\htmlagilitypack.new\Trunk\HtmlAgilityPack\HtmlWeb.cs:line 1061 at ChalmersResearchCMS.Utilities.ChalmersPersonalWeb.GetStaffDesc(String cid, String lang) in C:\Users\Urban Andersson\Source\Repos\chalmersresearchweb\ChalmersResearchCMS\Utilities\ChalmersPersonalWeb.cs:line 81
Source: chalmers.se
Showing 68 publications
2019
Bayesian Fairness
Christos Dimitrakakis, Yang Liu, David C. Parkes et al
THIRTY-THIRD AAAI CONFERENCE ON ARTIFICIAL INTELLIGENCE / THIRTY-FIRST INNOVATIVE APPLICATIONS OF ARTIFICIAL INTELLIGENCE CONFERENCE / NINTH AAAI SYMPOSIUM ON EDUCATIONAL ADVANCES IN ARTIFICIAL INTELLIGENCE, p. 509-516
Paper in proceedings
2019
Bayesian optimization in ab initio nuclear physics
Andreas Ekström, Christian Forssen, Christos Dimitrakakis et al
Journal of Physics G: Nuclear and Particle Physics. Vol. 46 (9)
Journal article
2018
VIVO: A secure, privacy-preserving, and real-time crowd-sensing framework for the Internet of Things
Luca Luceri, Felipe Cardoso, Michela Papandrea et al
Pervasive and Mobile Computing. Vol. 49, p. 126-138
Journal article
2017
DUCT: An upper confidence bound approach to distributed constraint optimization problems
Brammert Ottens, Christos Dimitrakakis, Boi Faltings
ACM Transactions on Intelligent Systems and Technology. Vol. 8 (5)
Journal article
2017
A Differentially Private Encryption Scheme
Carlo Brunetta, Christos Dimitrakakis, Bei Liang et al
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). Vol. 10599 LNCS, p. 309-326
Paper in proceedings
2017
Adaptive Sampling-based View Planning under Time Constraints
Lars Kunze, Mohan Sridharan, Christos Dimitrakakis et al
2017 European Conference on Mobile Robots (ECMR)
Paper in proceedings
2017
Multi-view decision processes: The helper-AI problem
Christos Dimitrakakis, David C. Parkes, Goran Radanovic et al
Advances in Neural Information Processing Systems. Vol. 2017-December, p. 5444-5453
Paper in proceedings
2017
Near-Optimal Blacklisting
Christos Dimitrakakis, Aikaterini Mitrokotsa
Computers and Security. Vol. 64 (1), p. 110-121
Journal article
2017
Thompson Sampling for Stochastic Bandits with Graph Feedback
Aristide Tossou, Christos Dimitrakakis, Devdatt Dubhashi
31st AAAI Conference on Artificial Intelligence, AAAI 2017, San Francisco, United States, 4-10 February 2017, p. 2660-2666
Paper in proceedings
2017
Achieving Privacy in the Adversarial Multi-Armed Bandit
Aristide Tossou, Christos Dimitrakakis
31st AAAI Conference on Artificial Intelligence, AAAI 2017, San Francisco, United States, 4-10 February 2017, p. 2653-2659
Paper in proceedings
2017
Differential privacy for Bayesian inference through posterior sampling
Christos Dimitrakakis, B.E.N. Nelson, Zuhe Zhang et al
Journal of Machine Learning Research. Vol. 18 (1 March 2017)
Journal article
2017
Bayesian Inference for Least Squares Temporal Difference Regularization
Nikolaos Tziortztiois, Christos Dimitrakakis
ECML 2017
Paper in proceedings
2016
On the differential privacy of Bayesian inference
Zuhe Zhang, B. Rubinstein, Christos Dimitrakakis
30th AAAI Conference on Artificial Intelligence, AAAI 2016, Phoenix Convention CenterPhoenix, United States, 12-17 February 2016, p. 2365-2371
Paper in proceedings
2016
Optimal advertisement strategies for small and big companies
Aristide Tossou, Christos Dimitrakakis
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering. Vol. 171, p. 94-98
Paper in proceedings
2016
Synergistic user ↔ context analytics
A. Hossmann-Picu, Z. Li, Z. Zhao et al
Advances in Intelligent Systems and Computing, p. 163-172
Book chapter
2016
Algorithms for Differentially Private Multi-Armed Bandits
Aristide Tossou, Christos Dimitrakakis
30th AAAI Conference on Artificial Intelligence, AAAI 2016, Phoenix Convention CenterPhoenix, United States, 12-17 February 2016, p. 2087-2093
Paper in proceedings
2015
Foreword - Proceedings of the 8th ACM Workshop on Artificial Intelligence and Security
Christos Dimitrakakis, Aikaterini Mitrokotsa, Arunesh Sinha et al
8th ACM Workshop on Artificial Intelligence and Security, AISec 2015 - co-located with CCS 2015; Denver; United States, p. iii-
Conference contribution
2015
Expected loss analysis for authentication in constrained channels
Christos Dimitrakakis, Aikaterini Mitrokotsa, Serge Vaudenay
Journal of Computer Security. Vol. 23 (2), p. 309-329
Journal article
2015
Differentially private, multi-agent multi-armed bandits
Aristide Tossou, Christos Dimitrakakis
European Workshop on Reinforcement Learning (EWRL-15)
Paper in proceedings
2015
Distance-Bounding Protocols: Are You Close Enough?
Christos Dimitrakakis, Aikaterini Mitrokotsa
IEEE Security and Privacy. Vol. 13 (4), p. 47-51
Journal article
2014
On the Leakage of Information in Biometric Authentication
Elena Pagnin, Christos Dimitrakakis, Aysajan Abidin et al
In Proceedings of Indocrypt - 15th International Conference on Cryptology in India 2014, New Delhi, December 2014., p. 265-280
Paper in proceedings
2014
Generalised entropy MDPs and Minimax Regret
Emmanouil Androulakis, Christos Dimitrakakis
NIPS 2014, From bad models to good policies workshop.
Paper in proceedings
2014
Cover Tree Bayesian Reinforcement Learning
N. Tziortziotis, Christos Dimitrakakis, K. Blekas
Journal of Machine Learning Research. Vol. 15, p. 2313-2335
Journal article
2014
Robust and private Bayesian inference
Christos Dimitrakakis, Blaine Nelson, Aikaterini Mitrokotsa et al
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). Vol. 8776, p. 291-305
Paper in proceedings
2014
Differential Privacy and Private Bayesian Inference.
Christos Dimitrakakis, Blaine Nelson, Ben Rubinstein et al
n Proceedings of the 19th Nordic Conference on Secure IT Systems (NordSec 2014), Poster, Tromso, Norway, October 2014., p. 289-290
Conference poster
2014
Foreword - Proceedings of the ACM Conference on Computer and Communications Security
Christos Dimitrakakis, Aikaterini Mitrokotsa, B. Rubinstein et al
7th ACM Workshop Artificial Intelligence and Security, AISec 2014, Co-located with the ACM Conference on Computer and Communication Security, CCS 2014, Scottsdale, United States, 7 November 2014. Vol. 2014-November (November), p. ii-
Conference contribution
2014
The reinforcement learning competition
Christos Dimitrakakis, Nikolaos Tziortziotis
Artificial Intelligence Magazine
Magazine article
2014
Usable ABC reinforcement learning
Christos Dimitrakakis, Nikolaos Tziortziotis
NIPS 2014, ABC in Montreal workshop.
Conference poster
2013
Proceedings of the ACM Conference on Computer and Communications Security: Foreword
B. Nelson, Christos Dimitrakakis, E. Shi et al
6th Annual ACM Workshop on Artificial Intelligence and Security, AISec 2013, Co-located with the 20th ACM Conference on Computer and Communications Security, CCS 2013, Berlin, Germany, 4 November 2013
Conference contribution
2013
Intrusion detection in MANET using classification algorithms: The effects of cost and model selection
Aikaterini Mitrokotsa, Christos Dimitrakakis
Ad Hoc Networks. Vol. 11 (1), p. 226-237
Journal article
2013
Summary/overview for artificial intelligence and security (AISec'13)
B.E.N. Nelson, Christos Dimitrakakis, E. Shi
Proceedings of the ACM Conference on Computer and Communications Security CCS 2013; Berlin; Germany; 4 November 2013 through 8 November 2013, p. 1483-1484
Paper in proceedings
2013
Generalization and Interference in Human Motor Control
Luca Lonini, Christos Dimitrakakis, Constantin Rothkopf et al
Computational and Robotic Models of the Hierarchical Organization of Behavior, p. 155-176
Book chapter
2013
Network Self-Organization Explains the Statistics and Dynamics of Synaptic Connection Strengths in Cortex
P. Zheng, Christos Dimitrakakis, J. Triesch
PLoS Computational Biology. Vol. 9 (1)
Journal article
2013
ABC Reinforcement Learning
Christos Dimitrakakis, Nikolaos Tziortziotis
JMLR W&CP (ICML 2013). Vol. 28 (3), p. 684-692
Paper in proceedings
2013
Personalized news recommendation with context trees
Florent Garcin, Christos Dimitrakakis, Boi Faltings
ACM Recommender Systems Conference, RecSys 2013
Paper in proceedings
2013
Linear Bayesian reinforcement learning
Nikolaos Tziortziotis, Christos Dimitrakakis, Konstantinos Blekas
IJCAI 2013, Proceedings of the 23rd International Joint Conference on Artificial Intelligence
Paper in proceedings
2013
Monte-Carlo utility estimates for Bayesian reinforcement learning
Christos Dimitrakakis
Proceedings of the IEEE Conference on Decision and Control, p. 7303-7308
Paper in proceedings
2013
On selecting the nonce length in distance bounding protocols
Aikaterini Mitrokotsa, Pedro Periz-Lopez, Christos Dimitrakakis et al
Computer Journal
Journal article
2013
Probabilistic inverse reinforcement learning in unknown environments
Aristide Tossou, Christos Dimitrakakis
Conference on Uncertainty in Artificial Intelligence, UAI 2013
Paper in proceedings
2012
Near-optimal Node Blacklisting in Adversarial Networks
Christos Dimitrakakis, Aikaterini Mitrokotsa
Conference on Decision and Game Theory for Security, GameSec 2012
Conference poster
2012
Guest editors' introduction: Special section on learning, games, and security
Christos Dimitrakakis, T. Karygiannis, Aikaterini Mitrokotsa
IEEE Transactions on Dependable and Secure Computing. Vol. 9 (4), p. 449-450
Magazine article
2012
DUCT: An Upper Confidence Bound Approach to Distributed Constraint Optimization Problems
Brammert Ottens, Christos Dimitrakakis, Boi Faltings
Conference on Artificial Ingelligence, AAAI 2012
Paper in proceedings
2012
Expected loss bounds for authentication in constrained channels
Christos Dimitrakakis, Aikaterini Mitrokotsa, S. Vaudenay
Proceedings - IEEE INFOCOM 2012, p. 478-485
Paper in proceedings
2011
Robust Bayesian reinforcement learning through tight lower bounds
Christos Dimitrakakis
EWRL 2011
Paper in proceedings
2011
Preference elicitation and inverse reinforcement learning
C.A. Rothkopf, Christos Dimitrakakis
Machine Learning and Knowledge Discovery in Databases, ECML 2011
Paper in proceedings
2011
Network Self-organization Explains the Distribution of Synaptic Efficacies in Neocortex
Pengsheng Zhang, Christos Dimitrakakis, Jochen Triesch
Proceedings of DevLeaNN: A Workshop on Development and Learning in Artificial Neural Networks
Conference poster
2011
Bayesian multitask inverse reinforcement learning
Christos Dimitrakakis, Constantin Rothkopf
EWRL 2011
Paper in proceedings
2011
Phoneme and sentence-level ensembles for speech recognition
Christos Dimitrakakis, S. Bengio
Eurasip Journal on Audio, Speech, and Music Processing. Vol. 2011
Journal article
2010
Context model inference for large or partially observable MDPs
Christos Dimitrakakis
ICML Workshop on reinforcement learning and search in very large spaces
Conference poster
2010
Reid et al.'s distance bounding protocol and mafia fraud attacks over noisy channels
Aikaterini Mitrokotsa, Christos Dimitrakakis, P. Peris-Lopez et al
IEEE Communications Letters. Vol. 14 (2), p. 121-123
Journal article
2010
Proceedings of the 1st International ECML/PKDD Workshop on Privacy and Security Issues in Data Mining and Machine Learning (PSDML 2010)
Christos Dimitrakakis, Aris Gkoulalas-Divanis, Aikaterini Mitrokotsa et al
Edited book
2010
Efficient methods for near-optimal sequential decision making under uncertainty
Christos Dimitrakakis
Interactive Collaborative Information Systems, Studies Computational Intelligence Volume 281
Book chapter
2010
Complexity of stochastic branch and bound methods for belief tree search in Bayesian reinforcement learning.
Christos Dimitrakakis
International conference on Agents and Artificial intelligence (ICAART 2010),
Paper in proceedings
2009
Intrusion detection using cost-sensitive classification
Aikaterini Mitrokotsa, Christos Dimitrakakis, C. Douligeris
Proceedings of the 3rd European Conference on Computer Network Defense, EC2ND 2007
Paper in proceedings
2009
Statistical decision making for authentication and intrusion detection
Christos Dimitrakakis, Aikaterini Mitrokotsa
8th International Conference on Machine Learning and Applications, ICMLA 2009, p. 409-414
Paper in proceedings
2008
Cost-minimising strategies for data labelling: Optimal stopping and active learning
Christos Dimitrakakis, C. Savu-Krohn
Foundations of Information and Knowledge Systems, FoIKS 2008
Paper in proceedings
2008
Algorithms and Bounds for Sampling-based Approximate Policy Iteration
Christos Dimitrakakis, Michail Lagoudakis
EWRL 2008
Paper in proceedings
2008
Exploration in POMDPs
Christos Dimitrakakis
OGAI Journal (Oesterreichische Gesellschaft fuer Artificial Intelligence). Vol. 27 (1), p. 24-31
Magazine article
2008
Rollout sampling approximate policy iteration
Christos Dimitrakakis, M.G. Lagoudakis
Machine Learning. Vol. 72 (3), p. 157-171
Journal article
2008
Tree exploration for bayesian RL exploration
Christos Dimitrakakis
2008 International Conference on Computational Intelligence for Modelling Control and Automation, CIMCA 2008, p. 1029-1034
Paper in proceedings
2006
Nearly Optimal Exploration-Exploitation Decision Thresholds
Christos Dimitrakakis
Artificial Neural Networks – ICANN 2006
Paper in proceedings
2005
Online adaptive policies for ensemble classifiers
Christos Dimitrakakis, S. Bengio
Neurocomputing. Vol. 64 (1-4 SPEC. ISS.), p. 211-221
Journal article
2005
Gradient-based Estimates of Return Distributions
Christos Dimitrakakis
PASCAL workshop on Principled Methods of Trading Exploration and Exploitation
Paper in proceedings
2005
Boosting word error rates
Christos Dimitrakakis, S. Bengio
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. Vol. V, p. V501-V504
Paper in proceedings
2004
Boosting HMMs with an application to speech recognition
Christos Dimitrakakis, Samy Bengio
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Paper in proceedings
Showing 5 research projects
2020–
Mechanisms for secure and private machine learning
Aikaterini Mitrokotsa
Networks and Systems (Chalmers)
Christos Dimitrakakis
Data Science
Chalmers AI Research Centre
2019–2022
System-Of-Systems for efficient Emergency Response and Urban Mobility (SoSER)
Xiaobo Qu
GeoEngineering
Christos Dimitrakakis
Data Science
Ivana Tasic
GeoEngineering
Changfu Zou
Automatic Control
Jie Zhu
GeoEngineering
Kun Gao
GeoEngineering
Ziling Zeng
GeoEngineering
VINNOVA
2016–2019
Learning, privacy and the limits of computation
Christos Dimitrakakis
Computing Science (Chalmers)
Swedish Research Council (VR)
2015–2018
ACE: Approximate Algorithms and Computing Systems
Per Stenström
Computer Engineering (Chalmers)
Johan Karlsson
Computer Science and Engineering (Chalmers)
Sally A McKee
Computer Engineering (Chalmers)
Ulf Assarsson
Computer Engineering (Chalmers)
Ioannis Sourdis
Computer Engineering (Chalmers)
Devdatt Dubhashi
Computing Science (Chalmers)
Christos Dimitrakakis
Computing Science (Chalmers)
Alexandra Angerd
Computer Engineering (Chalmers)
Jacob Lidman
Computer Engineering (Chalmers)
Behrooz Sangchoolie
Computer Engineering (Chalmers)
Fatemeh Ayatolahi
Computer Engineering (Chalmers)
Albin Eldstål Damlin
Computer Engineering (Chalmers)
Miquel Pericas
Computer Engineering (Chalmers)
Erik Sintorn
Computer Engineering (Chalmers)
Swedish Research Council (VR)
2015–2017
SwissSenseSynergia (SNSF)
Christos Dimitrakakis
Computing Science (Chalmers)
Aristide Tossou
Computing Science (Chalmers)
Aikaterini Mitrokotsa
Networks and Systems (Chalmers)
Swiss Federal Laboratories for Materials Science and Technology (Empa)
There might be more projects where Christos Dimitrakakis participates, but you have to be logged in as a Chalmers employee to see them.