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University of Angers, France

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37 Papers

A Deep Learning Approach to Minimize Retrieval Time in Shuttle-Based Storage Systems

Topics: Neural Networks; Machine Learning; Industrial Applications of AI; Deep Learning

Authors: Paul Courtin ^{1

;

2} , Jean-Baptiste Fasquel ¹ , Mehdi Lhommeau ¹ and Axel Grimault ¹

Affiliations: ¹ Université d’Angers, LARIS, SFR MASTIC, 62 Av. de Notre Dame du Lac, 49000 Angers, France , ² Knapp France, 3 Cours de la Gondoire, Carré Haussmann Marne La Vallée, Bâtiment A, 77600 Jossigny, France

Digital Object Identifier: 10.5220/0013255300003890

Proceedings of ICAART 2025, ISBN: 978-989-758-737-5

Quick Abstract

Improvement of picking performances in automated warehouse is influenced by the assignment of articles to storage locations. This problem is known as the Storage Location Assignment Problem (SLAP). In this paper, we present a deep learning method to assign articles to storage locations inside a shuttles-based storage and retrieval system (SBS/RS). We introduce the architecture of our a LSTM-based model and the public dataset used. Finally, we compare the retrieval time of articles provided by our model against other allocation methods.

Virtual Kitchen: Using a Touch Table for Cognitive Rehabilitation in Activities of Daily Living

Topics: General Input and Output Devices; Evaluation Paradigms and Frameworks; User Performance Evaluation; Usability and User Experience; User Interfaces

Authors: Paul Richard , Emmanuelle Richard , Maxime Macé and Teddy Louisy

Affiliation: LARIS SFR Mathstic, University of Angers, 62 Av. Notre Dame du Lac, 49000 Angers, France

Digital Object Identifier: 10.5220/0013356700003912

Proceedings of HUCAPP 2025, ISBN: 978-989-758-728-3

Quick Abstract

A tool designed to assess and rehabilitate memory in patients with Mild Cognitive Impairment (MCI) or People with Dementia (PwD) is presented. This tool includes a touch table equipped with a 3D camera on top for motion capture and a 3D Virtual Kitchen application. The aim is to assess and strengthen their ability to memorize and reproduce the activity of preparing a cup of sweetened coffee with milk. An errorless learning method has been implemented to prevent the user from performing and remembering any erroneous actions while performing the task. We conducted a preliminary study with eight healthy participants to investigate the usability of the solution. The results suggest that Virtual Kitchen on Hôsea touch table is user-friendly, motivating, and requires a moderate workload. We assume that the use of the touch table to interact with the virtual objects will optimize the rehabilitation process for instrumental activities of daily living (IADLs).

Virtual Interactive Tablet to Support Vocational Training in Immersive Environment

Topics: Interactive Systems for Education and Training; Virtual, Augmented and Mixed Reality; Interaction Devices and Immersive Displays

Authors: Pierre Gac ¹ , Paul Richard ² , Yann Papouin ³ , Sébastien George ⁴ and Émmanuelle Richard ²

Affiliations: ¹ Université d’Angers, LARIS-EA 7315, 49000, Angers, France, DEC Industrie, 3 rue du Champ du Verger, 72200, ALLONNES and France , ² Université d’Angers, LARIS-EA 7315, 49000, Angers and France , ³ DEC Industrie, 3 rue du Champ du Verger, 72200, ALLONNES and France , ⁴ Le Mans Université, LIUM-EA 4023, 72085, Le Mans, Cedex 9 and France

Digital Object Identifier: 10.5220/0007456201450152

Proceedings of HUCAPP 2019/VISIGRAPP, ISBN: 978-989-758-354-4

Quick Abstract

This paper presents a tool designed to assist a virtual reality learner in a vocational training context. The benefits of VR are spreading outside the video-games and research field, leading the vocational education institutions to consider using this technology for training purposes. By simulating emblematic professional situations, teachers can train students in good conditions regarding safety, logistics and financial resources. In the French vocational training system, VR is just at its beginnings and the lack of experiments with this training context highlighted the need for new tools allowing teachers to use VR with their students. The work presented in this paper is part of a global project aiming to create, design and assess new VR tools and methodologies for this specific context. In order to guide, inform and assist the user, we are presenting a generic tool that can ease VR sessions by proposing embedded tools within easy reach of the immersed user, such as a camera, an inventory, a printer or stock management. This tool is a virtual tablet that can be grabbed by the immersed user allowing her/him to interact efficiently with the virtual environment.

A New 2D Interaction-based Method for the Behavioral Analysis of Instrumental Activities of Daily Living

Topics: Analysis Methods and Tools; User Performance Evaluation; Usability and User Experience

Authors: Eulalie Verhulst ¹ , Déborah Foloppe ¹ , Paul Richard ¹ , Frédéric Banville ² and Philippe Allain ¹

Affiliations: ¹ Université d’Angers, France , ² Université de Montréal, Canada

Digital Object Identifier: 10.5220/0006255901460151

Proceedings of HUCAPP 2017/VISIGRAPP, ISBN: 978-989-758-229-5

Quick Abstract

In neuropsychology, many computerized solutions have been proposed in order to assess patients’ functioning in activities of daily living, via realistic interactive simulation. In this context, most developed systems are based on simple devices, real time 2D interaction, and monoscopic 3D computer graphics environment. Behavioral analysis has drawn the interest of many domains, such as neuropsychology, ergonomics, web design, or virtual reality. However, advances on this topic remains fragmented in their respective areas. Thus, in computerized solutions applied to neuropsychology, the behavioral analysis does not take into account the data from interaction. The potential interest of computerized solutions is hence underexploited. In this paper, we propose a transdisciplinary solution, based on a finer analysis of 2D interaction data, such as stop duration. This method could reveal interesting aspects of users’ behaviors.

Using Constraint Solver for 3D Layout Assistance in Human-scale Virtual Environment

Topics: Evaluation Paradigms and Frameworks; User Performance Evaluation; 3D Interaction Techniques and Metaphores

Authors: Marouene Kefi ¹ , Paul Richard ¹ , Thuong Hoang ² , Takehiko Yamaguchi ³ and Vincent Barichard ¹

Affiliations: ¹ University of Angers, France , ² University of Melbourne, Australia , ³ Tokyo University of Sciences, Japan

Digital Object Identifier: 10.5220/0006140400270038

Proceedings of HUCAPP 2017/VISIGRAPP, ISBN: 978-989-758-229-5

Quick Abstract

This paper proposes a combination of virtual reality (VR) and constraint programming (CP) to develop an efficient system that will assist users when performing 3D layout tasks in a virtual environment. We conducted an experimental study to investigate the extent to which the solver’s assistance affects user performance in 3D-layout tasks. Volunteer participants were instructed to layout a generic 3D scene which was displayed on a large-scale rear-projected screen. Results showed that the solver provided significant assistance in both simple and complex tasks. The participants performed the layout tasks more accurately and in significantly less time when the constraint solver was used. Most of the subjects reported that the solver was useful in completing the layout tasks and they were generally satisfied by the proposed solution. However, it was observed that some subjects had difficulty in interacting with the solver, especially during the complex tasks.

Using Virtual Reality Techniques to Study Cognitive Processes in Car Driving Activity

Topics: Virtual, Augmented and Mixed Reality; Interaction Devices and Immersive Displays

Authors: Emmanuelle Ménétrier ¹ , Paul Richard ¹ , Vincent Boucher ² and Christophe Boujon ¹

Affiliations: ¹ Université d’Angers, France , ² Centre d’Etudes et d’Expertise sur les Risques, l’Environnement and la Mobilité et l’Aménagement, France

Digital Object Identifier: 10.5220/0006230901380145

Proceedings of HUCAPP 2017/VISIGRAPP, ISBN: 978-989-758-229-5

Quick Abstract

A central question in cognitive sciences is how behaviors adapted to the situations encountered are produced. This question can be addressed in different ways and often requires the researcher to choose between highly controlled and standardized laboratory situations (commonly referred to as artificial settings) and studies undertaken in natural settings which may be more realistic, but cannot be controlled as required by a rigorous scientific approach. Using car driving as an example, our study will show how virtual reality (VR) offers a compromise between these two alternatives. Indeed, VR can simulate controlled immersive environments that offer different levels of realism. Moreover, VR makes it possible to implement different devices. For instance, VR enables researchers to analyze oculomotor behavior, which is fundamental in the field of car driving and is considered an indicator of attentional deployment. The work presented in this paper is based on a car driving simulator currently under development and aimed at studying the cognitive processes involved in car driving such as attentional processes and anticipatory mechanisms.

Virtual Reality Techniques for 3D Data-Warehouse Exploration

Topics: User Performance Evaluation; Usability and User Experience; 3D Interaction Techniques and Metaphores

Authors: Hamza Hamdi , Eulalie Verhulst and Paul Richard

Affiliation: Université d'Angers, France

Digital Object Identifier: 10.5220/0006130400750083

Proceedings of HUCAPP 2017/VISIGRAPP, ISBN: 978-989-758-229-5

Quick Abstract

This paper focuses on the evaluation of virtual reality (VR) interaction techniques for exploration of data warehouse (DW). The experimental DW involves hierarchical levels and contains information about customers profiles and related purchase items. A user study has been carried out to compare two navigation and selection techniques. Sixteen volunteers were instructed to explore the DW and look for information using the interaction techniques, involving either a single WiimoteTM (monomanual) or both WiimoteTM and NunchuckTM (bimanual). Results indicated that the bimanual interaction technique is more efficient in terms of speed and error rate. Moreover, most of the participants preferred the bimanual interaction technique and found it more appropriate for the exploration task. We also observed that males were faster and made less errors than females for both interaction techniques.

3D Interaction Techniques for Virtual Shopping: Design and Preliminary Study

Topics: Virtual Reality Tools and Languages (X3D, VRML, Java3D, OpenGL, ...); Evaluation of Human Performance and Usability in Virtual Environments

Authors: Eulalie Verhulst ¹ , Paul Richard ¹ , Emmmanuelle Richard ¹ , Philippe Allain ¹ and Pierre Nolin ²

Affiliations: ¹ Université d'Angers, France , ² Université du Québec, Canada

Digital Object Identifier: 10.5220/0005725402690277

Proceedings of GRAPP 2016/VISIGRAPP, ISBN: 978-989-758-175-5

Quick Abstract

Virtual Reality is now recognized as a powerful tool for the assessment and rehabilitation of both motor and cognitive impairments. In this context, effective Virtual Environments (VEs) that simulate everyday tasks must be proposed. We have developed a virtual supermarket (VS) in which the user can explore and collect various items using a shopping cart. Four interaction techniques have been designed and compared in terms of usability, performance and workload with healthy volunteer participants. These techniques go beyond the desktop paradigm by offering a more immersive and intuitive way of interaction. Results showed that participants were more efficient in terms of performance (completion time and travelled distance) using the game-pad rather than using full body gestures. However, they had more fun performing the task under these conditions.

Related Ontology Subjects/Areas/Topics (4)

Computer Vision, Visualization and Computer Graphics		Interactive Environments		Virtual Reality Tools and Languages (X3D, VRML, Java3D, OpenGL, ...)
Evaluation of Human Performance and Usability in Virtual Environments

Virtual Reality System for Rehabilitation of Children with Cerebral Palsy: A Preliminary Study

Topics: Games for Education and Training; Evaluation of Human Performance and Usability in Virtual Environments

Authors: Pierre Michel ¹ , Paul Richard ¹ , Takehiko Yamaguchi ² , Adrien Verhulst ³ , Eulalie Verhulst ¹ and Mickaël Dinomais ¹

Affiliations: ¹ Université d'Angers, France , ² Tokyo University of Science, Japan , ³ Université de Nantes, France

Digital Object Identifier: 10.5220/0005720503040311

Proceedings of GRAPP 2016/VISIGRAPP, ISBN: 978-989-758-175-5

Quick Abstract

We present a non-immersive virtual reality (VR) system for the rehabilitation of children with Cerebral Palsy (CP). Our objective is to encourage and motivate children to improve their limb motor control while play- ing a game. Two tasks are available : (1) intercepting or (2) to catching / releasing moving objects using a Kinect sensor. These tasks are achieved via the control of a virtual character placed in a virtual island. A control-display ratio is used to virtually increase the child workspace allowing him/her to reach all the approaching objects. In addition, a dynamic difﬁculty adjustment (DDA) is used to keep a good motivation level. Furthermore, a virtual coach is provided to support and congratulate the children. Twenty healthy chil- dren participated in a preliminary experiment. The aim was (1) to collect control data concerning performance and workload, and (2) to investigate the effect of the virtual coach. Results show a good usability of the game and reveal a high ratio of acceptance and enjoyment from the children.

Related Ontology Subjects/Areas/Topics (4)

Computer Vision, Visualization and Computer Graphics		Games for Education and Training		Interactive Environments
Evaluation of Human Performance and Usability in Virtual Environments

Component-based Authoring Tool for Haptic Navigation

Topics: Advanced User Interfaces; Virtual Reality Tools and Languages (X3D, VRML, Java3D, OpenGL, ...)

Authors: Takehiko Yamaguchi ¹ , Kazuhiro Oshima ¹ , Yuto Hirano ¹ , Akiyo Makishima ¹ , Testsuya Harada ¹ and Paul Richard ²

Affiliations: ¹ Tokyo University of Science, Japan , ² Université d’Angers, France

Digital Object Identifier: 10.5220/0005357804860491

Proceedings of GRAPP 2015/VISIGRAPP, ISBN: 978-989-758-087-1

Quick Abstract

Nowadays, providing a uniform development environment for haptic applications is considered as one of the critical issues in haptic technologies. Thus, to date, we have developed a component-based haptic authoring framework using a component capability extension mechanisms supported by Unity3D. Our aim is to develop a newly revised haptic component to extend our previous framework. The proposed component enables a user to design haptic interface such as haptic navigation, as well as to help simulate/investigate the effect of the haptic interaction. In this paper, we present a prototype system and its capabilities.

Related Ontology Subjects/Areas/Topics (4)

Advanced User Interfaces		Interactive Environments		Virtual Reality Tools and Languages (X3D, VRML, Java3D, OpenGL, ...)
Computer Vision, Visualization and Computer Graphics

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