Search Results for author: Ubbo Visser

Found 5 papers, 1 papers with code

Let's be friends! A rapport-building 3D embodied conversational agent for the Human Support Robot

no code implementations8 Mar 2021 Katarzyna Pasternak, Zishi Wu, Ubbo Visser, Christine Lisetti

Our contribution is the complex integration of an expressive ECA, able to track its interlocutor's face, and to mirror his/her facial expressions and head movements in real time, integrated with a human support robot such that the robot and the agent are fully aware of each others', and of the users', nonverbals cues.

Converting Instance Checking to Subsumption: A Rethink for Object Queries over Practical Ontologies

no code implementations24 Dec 2014 Jia Xu, Patrick Shironoshita, Ubbo Visser, Nigel John, Mansur Kabuka

Efficiently querying Description Logic (DL) ontologies is becoming a vital task in various data-intensive DL applications.

Off-Policy General Value Functions to Represent Dynamic Role Assignments in RoboCup 3D Soccer Simulation

1 code implementation18 Feb 2014 Saminda Abeyruwan, Andreas Seekircher, Ubbo Visser

Collecting and maintaining accurate world knowledge in a dynamic, complex, adversarial, and stochastic environment such as the RoboCup 3D Soccer Simulation is a challenging task.

Reinforcement Learning (RL) World Knowledge

Extract ABox Modules for Efficient Ontology Querying

no code implementations21 May 2013 Jia Xu, Patrick Shironoshita, Ubbo Visser, Nigel John, Mansur Kabuka

The extraction of logically-independent fragments out of an ontology ABox can be useful for solving the tractability problem of querying ontologies with large ABoxes.

Retrieval

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