scholarly journals A Comparison of Three Techniques to Interact in Large Virtual Environments Using Haptic Devices with Limited Workspace

2006 ◽  
pp. 288-299 ◽  
Author(s):  
Lionel Dominjon ◽  
Anatole Lécuyer ◽  
Jean-Marie Burkhardt ◽  
Simon Richir
Keyword(s):  
Virtual Environments ◽  
Haptic Devices

scholarly journals Haptic Virtual Environments for Blind People: Exploratory Experiments with Two Devices

1999 ◽  
Vol 4 (1) ◽  
pp. 8-17 ◽  
Author(s):  
G Jansson ◽  
H Petrie ◽  
C Colwell ◽  
D. Kornbrot ◽  
J. Fänger ◽  
...  
Keyword(s):  
Virtual Environments ◽  
Virtual World ◽  
Force Feedback ◽  
Virtual Object ◽  
Blind People ◽  
Haptic Devices ◽  
Virtual Objects ◽  
3D Objects

This paper is a fusion of two independent studies investigating related problems concerning the use of haptic virtual environments for blind people: a study in Sweden using a PHANToM 1.5 A and one in the U.K. using an Impulse Engine 3000. In general, the use of such devices is a most interesting option to provide blind people with information about representations of the 3D world, but the restriction at each moment to only one point of contact between observer and virtual object might decrease their effectiveness. The studies investigated the perception of virtual textures, the identification of virtual objects and the perception of their size and angles. Both sighted (blindfolded in one study) and blind people served as participants. It was found (1) that the PHANToM can effectively render textures in the form of sandpapers and simple 3D geometric forms and (2) that the Impulse Engine can effectively render textures consisting of grooved surfaces, as well as 3D objects, properties of which were, however, judged with some over- or underestimation. When blind and sighted participants' performance was compared differences were found that deserves further attention. In general, the haptic devices studied have demonstrated the great potential of force feedback devices in rendering relatively simple environments, in spite of the restricted ways they allow for exploring the virtual world. The results highly motivate further studies of their effectiveness, especially in more complex contexts.

scholarly journals Immersive Virtual Environments and Wearable Haptic Devices in rehabilitation of children with neuromotor impairments: a single-blind randomized controlled crossover pilot study

2020 ◽  
Vol 17 (1) ◽  
Author(s):  
Ilaria Bortone ◽  
Michele Barsotti ◽  
Daniele Leonardis ◽  
Alessandra Crecchi ◽  
Alessandra Tozzini ◽  
...  
Keyword(s):  
Virtual Environments ◽  
Primary Outcome ◽  
Haptic Devices ◽  
Immersive Virtual Environments ◽  
Randomized Controlled ◽  
The Past ◽  
Movement Error ◽  
Nine Hole Peg Test ◽  
Second Period ◽  
Single Blind

Abstract Background The past decade has seen the emergence of rehabilitation treatments using virtual reality. One of the advantages in using this technology is the potential to create positive motivation, by means of engaging environments and tasks shaped in the form of serious games. The aim of this study is to determine the efficacy of immersive Virtual Environments and weaRable hAptic devices (VERA) for rehabilitation of upper limb in children with Cerebral Palsy (CP) and Developmental Dyspraxia (DD). Methods A two period cross-over design was adopted for determining the differences between the proposed therapy and a conventional treatment. Eight children were randomized into two groups: one group received the VERA treatment in the first period and the manual therapy in the second period, and viceversa for the other group. Children were assessed at the beginning and the end of each period through both the Nine Hole Peg Test (9-HPT, primary outcome) and Kinesiological Measurements obtained during the performing of similar tasks in a real setting scenario (secondary outcomes). Results All subjects, not depending from which group they come from, significantly improved in both the performance of the 9-HPT and in the parameters of the kinesiological measurements (movement error and smoothness). No statistically significant differences have been found between the two groups. Conclusions These findings suggest that immersive VE and wearable haptic devices is a viable alternative to conventional therapy for improving upper extremity function in children with neuromotor impairments. Trial registration ClinicalTrials, NCT03353623. Registered 27 November 2017-Retrospectively registered, https://clinicaltrials.gov/ct2/show/NCT03353623

Development of a Networked Haptic Environment in VR to Facilitate Collaborative Design Using Voxmap Pointshell (VPS) Software

2004 ◽  
Author(s):  
Chang E. Kim ◽  
Judy M. Vance
Keyword(s):  
Virtual Environments ◽  
Virtual Environment ◽  
Collaborative Design ◽  
Force Feedback ◽  
Global Network ◽  
Local Network ◽  
Haptic Devices ◽  
Geographically Dispersed ◽  
Networked Virtual Environment ◽  
Sharing Space

A networked virtual environment is a hardware and software system where people who are geographically dispersed over the world can interact with each other by sharing space, presence, and time [1]. The goal of the work presented here is to develop methods to facilitate the use of force feedback, or haptic, devices within a networked virtual environment. Our research aims at investigating and constructing a networked haptic environment (NHE) over a non-dedicated channel for multiple users. The NHE consists of a local network between each haptic device and each virtual environment, as well as a global network linking all of the virtual environments. Position synchronization throughout the global network is accomplished using “Released-but-not-released” method (RNR) which allows computers with different performance capabilities to participate in the network without users experiencing inaccurate object motions. The networked virtual assembly application has been demonstrated using several haptic devices and several virtual environments, without a limitation on number of users or complexity of input models. Performance measures are examined and future work is outlined.

Implementation of a virtual tennis entertainment system with haptic behaviour

2004 ◽  
Vol 218 (3) ◽  
pp. 345-355 ◽  
Author(s):  
K-S Hsu ◽  
M-Y Cheng ◽  
M-G Her
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Virtual Environments ◽  
Real Time ◽  
Spring Model ◽  
Virtual Reality System ◽  
Dynamic Simulations ◽  
Haptic Devices ◽  
Human Operators ◽  
Main Components

For most of the virtual reality system, one of the major aims is to provide a vivid interaction platform between the human operators and the haptic devices. Through the user interface, a skilful operator can control the haptic devices to accomplish relatively complicated jobs in real-time. Generally, the main components of a virtual reality system include dynamic simulations, haptic devices and the user interface, which is composed of virtual environments and visual equipment. This study focuses on developing a virtual tennis entertainment system with haptic behaviour. A parallel-type robot and a serial-type robot are employed as the haptic device handlers in this study, in which they are controlled directly by the operator's arm through the user interface. The operator can sense the change in virtual environment provided by dynamic simulations. In addition, the human operator can ‘see’ the change of environment during operation in real-time through the screen. A virtual spring model and a virtual damper model were constructed to simulate the process of tennis playing in this study. Experimental results verify the feasibility of the proposed virtual tennis entertainment system.

The sense of presence in virtual environments:

2003 ◽  
Vol 15 (2) ◽  
pp. 69-71 ◽  
Author(s):  
Thomas W. Schubert
Keyword(s):  
Virtual Environments ◽  
Coding Theory ◽  
Model Building ◽  
Self Report ◽  
Survey Study ◽  
Spatial Presence ◽  
Component Structure ◽  
Sense Of Presence ◽  
Being There ◽  
Measure Sense

Abstract. The sense of presence is the feeling of being there in a virtual environment. A three-component self report scale to measure sense of presence is described, the components being sense of spatial presence, involvement, and realness. This three-component structure was developed in a survey study with players of 3D games (N = 246) and replicated in a second survey study (N = 296); studies using the scale for measuring the effects of interaction on presence provide evidence for validity. The findings are explained by the Potential Action Coding Theory of presence, which assumes that presence develops from mental model building and suppression of the real environment.

Dreamlike and Playful Virtual Environments to Inspire Children’s Divergent Thinking

2020 ◽  
pp. 1-11
Author(s):  
Jérôme Guegan ◽  
Claire Brechet ◽  
Julien Nelson
Keyword(s):  
Virtual Environments ◽  
Divergent Thinking ◽  
Idea Generation ◽  
Combined Processes ◽  
Office Environment ◽  
School Aged Children

Abstract. Computers have long been seen as possible tools to foster creativity in children. In this respect, virtual environments present an interesting potential to support idea generation but also to steer it in relevant directions. A total of 96 school-aged children completed a standard divergent thinking task while being exposed to one of three virtual environments: a replica of the headmistress’s office, a replica of their schoolyard, and a dreamlike environment. Results showed that participants produced more original ideas in the dreamlike and playful environments than in the headmistress’s office environment. Additionally, the contents of the environment influenced the selective exploration of idea categories. We discuss these results in terms of two combined processes: explicit references to sources of inspiration in the environment, and the implicit priming of specific idea categories.

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