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Aksoy, Eren
Publications (2 of 2) Show all publications
Aein, M. J., Aksoy, E. & Wörgötter, F. (2019). Internet Provisioning in VANETs: Performance Modeling of Drive-Thru Scenarios. The international journal of robotics research, 38(8), 910-934
Open this publication in new window or tab >>Internet Provisioning in VANETs: Performance Modeling of Drive-Thru Scenarios
2019 (English)In: The international journal of robotics research, ISSN 0278-3649, E-ISSN 1741-3176, Vol. 38, no 8, p. 910-934Article in journal (Refereed) Published
Abstract [en]

Drive-thru-Internet is a scenario in cooperative intelligent transportation systems (C-ITSs), where a road-side unit (RSU) provides multimedia services to vehicles that pass by. Performance of the drive-thru-Internet depends on various factors, including data traffic intensity, vehicle traffic density, and radio-link quality within the coverage area of the RSU, and must be evaluated at the stage of system design in order to fulfill the quality-of-service requirements of the customers in C-ITS. In this paper, we present an analytical framework that models downlink traffic in a drive-thru-Internet scenario by means of a multidimensional Markov process: the packet arrivals in the RSU buffer constitute Poisson processes and the transmission times are exponentially distributed. Taking into account the state space explosion problem associated with multidimensional Markov processes, we use iterative perturbation techniques to calculate the stationary distribution of the Markov chain. Our numerical results reveal that the proposed approach yields accurate estimates of various performance metrics, such as the mean queue content and the mean packet delay for a wide range of workloads. © 2019 IEEE.

Place, publisher, year, edition, pages
London: Sage Publications, 2019
Keywords
Library of Actions, Execution, Manipulation Action, Semantic Event Chain
National Category
Robotics
Identifiers
urn:nbn:se:hh:diva-38427 (URN)10.1177/0278364919850295 (DOI)2-s2.0-85067085299 (Scopus ID)
Projects
ReconCell
Funder
EU, Horizon 2020, 680431
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-07-30Bibliographically approved
Rothfuss, J., Ferreira, F., Aksoy, E., Zhou, Y. & Asfour, T. (2018). Deep Episodic Memory: Encoding, Recalling, and Predicting Episodic Experiences for Robot Action Execution. IEEE Robotics and Automation Letters, 3(4), 4007-4014
Open this publication in new window or tab >>Deep Episodic Memory: Encoding, Recalling, and Predicting Episodic Experiences for Robot Action Execution
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2018 (English)In: IEEE Robotics and Automation Letters, ISSN 2377-3766, E-ISSN 1949-3045, Vol. 3, no 4, p. 4007-4014Article in journal (Refereed) Published
Abstract [en]

We present a novel deep neural network architecture for representing robot experiences in an episodic-like memory that facilitates encoding, recalling, and predicting action experiences. Our proposed unsupervised deep episodic memory model as follows: First, encodes observed actions in a latent vector space and, based on this latent encoding, second, infers most similar episodes previously experienced, third, reconstructs original episodes, and finally, predicts future frames in an end-to-end fashion. Results show that conceptually similar actions are mapped into the same region of the latent vector space. Based on these results, we introduce an action matching and retrieval mechanism, benchmark its performance on two large-scale action datasets, 20BN-something-something and ActivityNet and evaluate its generalization capability in a real-world scenario on a humanoid robot.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2018
Keywords
Learning and adaptive systems, visual learning, deep learning in robotics and automation
National Category
Robotics
Identifiers
urn:nbn:se:hh:diva-38426 (URN)10.1109/LRA.2018.2860057 (DOI)000441935900003 ()
Funder
EU, Horizon 2020, 641100 (TimeStorm)German Research Foundation (DFG), SPP 1527
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2018-11-27Bibliographically approved
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