All Stories

  1. Reinforcement learning for human-robot interaction

    Article • Paladyn Journal of Behavioral Robotics, August 2018, De Gruyter

    Costas Tzafestas, Mehdi Khamassi

  2. Robot fast adaptation to changes in human engagement during simulated dynamic social interaction with active exploration in parameterized reinforcement learning

    Article • IEEE Transactions on Cognitive and Developmental Systems, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  3. User-Oriented Evaluation of a Robotic Rollator That Provides Navigation Assistance in Frail Older Adults with and without Cognitive Impairment

    Article • Gerontology, November 2017, Karger Publishers

    Dr. Christian Werner, Costas Tzafestas

  4. Bio-inspired meta-learning for active exploration during non-stationary multi-armed bandit tasks

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  5. Real-time end-effector motion behavior planning approach using on-line point-cloud data towards a user adaptive assistive bath robot

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  6. Towards a user-adaptive context-aware robotic walker with a pathological gait assessment system: First experimental study

    Article • September 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  7. Estimating double support in pathological gaits using an HMM-based analyzer for an intelligent robotic walker

    Article • August 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  8. Intelligent Assistive Robotic Systems for the elderly

    Article • June 2017, ACM (Association for Computing Machinery)

    Costas Tzafestas, Georgia Chalvatzaki

  9. Comparative experimental validation of human gait tracking algorithms for an intelligent robotic rollator

    Article • May 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  10. Active Exploration and Parameterized Reinforcement Learning Applied to a Simulated Human-Robot Interaction Task

    Article • April 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  11. Social Human-Robot Interaction for the Elderly

    Article • March 2017, ACM (Association for Computing Machinery)

    Costas Tzafestas

  12. Intention-based front-following control for an intelligent robotic rollator in indoor environments

    Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  13. The MOBOT rollator human-robot interaction model and user evaluation process

    Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  14. Experimental comparison of human gait tracking algorithms: Towards a context-aware mobility assistance robotic walker

    Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Christian Werner, Costas Tzafestas

  15. Experimental validation of human pathological gait analysis for an assisted living intelligent robotic walker

    Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Dr. Christian Werner, Costas Tzafestas

  16. Assistive front-following control of an intelligent robotic rollator based on a modified dynamic window planner

    Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  17. Simplifying mobile robot tracking control through feedback equivalence

    Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  18. Towards ICT-supported bath robots: Control architecture description and localized perception of user for robot motion planning

    Article • June 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  19. Human Joint Angle Estimation and Gesture Recognition for Assistive Robotic Vision

    Article • January 2016, Springer Science + Business Media

    Dr. Christian Werner, Costas Tzafestas

  20. The MOBOT Human-Robot Interaction

    Article • January 2016, ACM (Association for Computing Machinery)

    Costas Tzafestas

  21. The MOBOT Platform – Showcasing Multimodality in Human-Assistive Robot Interaction

    Article • January 2016, Springer Science + Business Media

    Costas Tzafestas

  22. The MOBOT human-robot communication model

    Article • October 2015, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  23. Hidden markov modeling of human pathological gait using laser range finder for an assisted living intelligent robotic walker

    Article • September 2015, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  24. Model-free learning on robot kinematic chains using a nested multi-agent topology

    Article • Journal of Experimental & Theoretical Artificial Intelligence, June 2015, Taylor & Francis

    Costas Tzafestas

  25. Hidden Markov modeling of human normal gait using laser range finder for a mobility assistance robot

    Article • May 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  26. RMAP: a rectangular cuboid approximation framework for 3D environment mapping

    Article • Autonomous Robots, February 2014, Springer Science + Business Media

    Dirk Wollherr, Costas Tzafestas

  27. Advances in Intelligent Mobility Assistance Robot Integrating Multimodal Sensory Processing

    Article • January 2014, Springer Science + Business Media

    Costas Tzafestas

  28. Data Acquisition towards Defining a Multimodal Interaction Model for Human – Assistive Robot Communication

    Article • January 2014, Springer Science + Business Media

    Costas Tzafestas

  29. Telehaptic Perception of Delayed Stiffness Using Adaptive Impedance Control: Experimental Psychophysical Analysis

    Article • PRESENCE Virtual and Augmented Reality, November 2013, The MIT Press

    Costas Tzafestas

  30. Enhancing surgical accuracy using virtual fixtures and motion compensation in robotic beating heart surgery

    Article • June 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  31. Shared control for motion compensation in robotic beating heart surgery

    Article • May 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  32. An optimization approach for 3D environment mapping using normal vector uncertainty

    Article • December 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Dirk Wollherr, Costas Tzafestas

  33. Model-mediated telehaptic perception of delayed curvature

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  34. Robustness and generalization of model-free learning for robot kinematic control using a nested-hierarchical multi-agent topology

    Article • June 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  35. Online Semantic Mapping of Urban Environments

    Article • January 2012, Springer Science + Business Media

    Dirk Wollherr, Costas Tzafestas

  36. Revealing Cluster Formation over Huge Volatile Robotic Data

    Article • December 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Dirk Wollherr, Costas Tzafestas

  37. Fuzzy rule based neuro-dynamic programming for mobile robot skill acquisition on the basis of a nested multi-agent architecture

    Article • December 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  38. Human telehaptic perception of stiffness using an adaptive impedance reflection bilateral teleoperation control scheme

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  39. Stereo Analysis of Archaelogical Scenes Using Monogenic Signal Representation

    Article • January 2010, Springer Science + Business Media

    Costas Tzafestas

  40. Gestural teleoperation of a mobile robot based on visual recognition of sign language static handshapes

    Article • September 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  41. Web-based remote and virtual programming console of the V+ robotic system

    Article • November 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  42. Multi-agent hierarchical architecture modeling kinematic chains employing continuous RL learning with fuzzified state space

    Article • October 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  43. Adaptive impedance control in haptic teleoperation to improve transparency under time-delay

    Article • May 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  44. Pilot Evaluation Study of a Virtual Paracentesis Simulator for Skill Training and Assessment: The Beneficial Effect of Haptic Display

    Article • PRESENCE Virtual and Augmented Reality, April 2008, The MIT Press

    Yiannis Koumpouros, Costas Tzafestas

  45. Maximum Likelihood SLAM in Dynamic Environments

    Article • October 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  46. Temporal Occupancy Grid for mobile robot dynamic environment mapping

    Article • June 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  47. Visuo-Haptic Interface for Teleoperation of Mobile Robot Exploration Tasks

    Article • September 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  48. Virtual and Remote Robotic Laboratory: Comparative Experimental Evaluation

    Article • IEEE Transactions on Education, August 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  49. Experimental Evaluation and Pilot Assessment Study of a Virtual and Remote Laboratory on Robotic Manipulation

    Article • January 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  50. Haptic interaction in VR-based paracentesis simulation for dexterity enhancement and assessment

    Article • International Congress Series, June 2004, Elsevier

    Yiannis Koumpouros, Costas Tzafestas

  51. Whole-hand kinesthetic feedback and haptic perception in dextrous virtual manipulation

    Article • IEEE Transactions on Systems Man and Cybernetics - Part A Systems and Humans, January 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  52. Article • Journal of Mathematical Imaging and Vision, January 2002, Springer Science + Business Media

    Costas Tzafestas

  53. Mobile robot motion control in partially unknown environments using a sliding-mode fuzzy-logic controller

    Article • Robotics and Autonomous Systems, October 2000, Elsevier

    Costas Tzafestas

  54. Article • Journal of Intelligent & Robotic Systems, January 1998, Springer Science + Business Media

    Costas Tzafestas

  55. Multi-robot teleoperation using direct human hand actions

    Article • Advanced Robotics, January 1996, Taylor & Francis

    Costas Tzafestas

  56. Robust sliding-mode control applied to a 5-link biped robot

    Article • Journal of Intelligent & Robotic Systems, January 1996, Springer Science + Business Media

    Costas Tzafestas

  57. Teleplanning by human demonstration for VR-based teleoperation of a mobile robotic assistant

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas

  58. Robust telemanipulator control using a partitioned neural network architecture

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Costas Tzafestas