Preliminary evaluation of a virtual reality dental simulation system on drilling operation

2015 ◽  
Vol 26 (s1) ◽  
pp. S747-S756 ◽  
Author(s):  
Dangxiao Wang ◽  
Siming Zhao ◽  
Teng Li ◽  
Yuru Zhang ◽  
Xiaoyan Wang
2015 ◽  
Vol 24 (4) ◽  
pp. 298-321 ◽  
Author(s):  
Ernesto de la Rubia ◽  
Antonio Diaz-Estrella

Virtual reality has become a promising field in recent decades, and its potential now seems clearer than ever. With the development of handheld devices and wireless technologies, interest in virtual reality is also increasing. Therefore, there is an accompanying interest in inertial sensors, which can provide such advantages as small size and low cost. Such sensors can also operate wirelessly and be used in an increasing number of interactive applications. An example related to virtual reality is the ability to move naturally through virtual environments. This is the objective of the real-walking navigation technique, for which a number of advantages have previously been reported in terms of presence, object searching, and collision, among other concerns. In this article, we address the use of foot-mounted inertial sensors to achieve real-walking navigation in a wireless virtual reality system. First, an overall description of the problem is presented. Then, specific difficulties are identified, and a corresponding technique is proposed to overcome each: tracking of foot movements; determination of the user’s position; percentage estimation of the gait cycle, including oscillating movements of the head; stabilization of the velocity of the point of view; and synchronization of head and body yaw angles. Finally, a preliminary evaluation of the system is conducted in which data and comments from participants were collected.


Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 3402-3402 ◽  
Author(s):  
Lori E. Crosby ◽  
Francis J Real ◽  
Bradley Cruse ◽  
David Davis ◽  
Melissa Klein ◽  
...  

Background: Although hydroxyurea (HU) is an effective disease modifying treatment for sickle cell disease (SCD), uptake remains low in pediatric populations in part due to parental concerns such as side-effects and safety. NHLBI Guidelines recommend shared decision making for HU initiation to elicit family preferences and values; however, clinicians lack specific training. A HU shared decision-making (H-SDM) toolkit was developed to facilitate such discussions (NCT03442114). It includes: 1) decision aids to support parents (brochure, booklet, video narratives, and an in-visit issue card [featuring issues parents reported as key to decision-making about HU]); 2) quality improvement tools to monitor shared decision-making performance; and 3) a curriculum to train clinicians in advanced communication skills to engage parents in shared decision-making. This abstract describes the development and preliminary evaluation of the virtual reality (VR) component of the clinician curriculum. Objectives: The goals are to: 1) describe the development of a VR simulation for training clinicians in advanced communication skills, and 2) present preliminary data about its tolerability, acceptability, and impact. Methods: Immersive VR simulations administered via a VR headset were created. The VR environment was designed to replicate a patient room, and graphical character representatives (avatars) of parents and patients were designed based on common demographics of patients with SCD (Figure 1). During simulations, the provider verbally counseled the avatars around HU initiation with avatars' verbal and non-verbal responses matched appropriately. The H-SDM in-visit issue card was incorporated into the virtual environment to reinforce practice with this tool. The VR curriculum was piloted for initial acceptability with parents of a child with SCD and clinicians at a children's hospital. Evaluation: Hematology providers participated in the workshop training that included information on facilitating shared decision-making with subsequent deliberate practice of skills through VR simulations. Each provider completed at least one VR simulation. The view through the VR headset was displayed on to a projector screen so others could view the virtual interaction. Debriefing occurred regarding use of communication skills and utilization of the issue card. To assess tolerability, providers reported side effects related to participation. To assess acceptability, providers completed a modified version of the Spatial Presence Questionnaire and described their experience. Impact was assessed by self-report on a retrospective pre-post survey of confidence in specific communication skills using a 5-point scale (from not confident at all to very confident). Differences in confidence were assessed using Wilcoxon Signed-ranks tests. Results: Nine providers (5 pediatric hematologists and 4 nurse practitioners at 3 children's hospitals) participated. Tolerability: The VR experience was well tolerated with most providers reporting no side effects (Table 1). Acceptability: All providers agreed or strongly agreed that the VR experience captured their senses and that they felt physically present in the VR environment. Providers described the experience as "enjoyable", "immersive", and "fun". One provider noted, "It (the VR simulation) put me in clinic to experience what it felt like to discuss HU and use the tool." Impact: Providers' self-reported confidence significantly improved after VR simulations on 4 of 5 communication skills: confirming understanding, Z =1.98, p = .05, r = .44, eliciting parent concerns/values, Z = 2.22, p = .03, r = .50, using an elicit-provide-elicit approach, Z =1.8, p = .02, r = .50, minimizing medical jargon, Z = 1.8, p = .07, r = .40, and using open-ended questions, Z =1.98, p = .05, r = .44. Median scores changed by one-point for all responses and effects were medium to large (see Figure 2). Discussion: The VR curriculum was rated as immersive, realistic, and well-tolerated. Providers endorsed it as a desirable training method. Self-report of confidence in shared decision making-related communication skills improved following completion of VR simulation. Thus, initial data support that VR may be an effective method for educating providers to engage parents in shared decision making for HU. Disclosures Quinn: Amgen: Other: Research Support; Celgene: Membership on an entity's Board of Directors or advisory committees.


2021 ◽  
pp. 67-84
Author(s):  
Jingyu Liu ◽  
Claire Mantel ◽  
Florian Schweiger ◽  
Søren Forchhammer

Technologies ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 31 ◽  
Author(s):  
Costas Boletsis ◽  
Stian Kongsvik

The drum-like virtual reality (VR) keyboard is a contemporary, controller-based interface for text input in VR that uses a drum set metaphor. The controllers are used as sticks which, through downward movements, “press” the keys of the virtual keyboard. In this work, a preliminary feasibility study of the drum-like VR keyboard is described, focusing on the text entry rate and accuracy as well as its usability and the user experience it offers. Seventeen participants evaluated the drum-like VR keyboard by having a typing session and completing a usability and a user experience questionnaire. The interface achieved a good usability score, positive experiential feedback around its entertaining and immersive qualities, a satisfying text entry rate (24.61 words-per-minute), as well as moderate-to-high total error rate (7.2%) that can probably be further improved in future studies. The work provides strong indications that the drum-like VR keyboard can be an effective and entertaining way to type in VR.


Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 451 ◽  
Author(s):  
Yun-Chieh Fan ◽  
Chih-Yu Wen

Soldier-based simulators have been attracting increased attention recently, with the aim of making complex military tactics more effective, such that soldiers are able to respond rapidly and logically to battlespace situations and the commander’s decisions in the battlefield. Moreover, body area networks (BANs) can be applied to collect the training data in order to provide greater access to soldiers’ physical actions or postures as they occur in real routine training. Therefore, due to the limited physical space of training facilities, an efficient soldier-based training strategy is proposed that integrates a virtual reality (VR) simulation system with a BAN, which can capture body movements such as walking, running, shooting, and crouching in a virtual environment. The performance evaluation shows that the proposed VR simulation system is able to provide complete and substantial information throughout the training process, including detection, estimation, and monitoring capabilities.


1994 ◽  
Vol 3 (4) ◽  
pp. 360-366 ◽  
Author(s):  
Sharon A. Stansfield

This paper presents a laboratory review of current research being undertaken at Sandia National Laboratories in the development of a distributed virtual reality simulation system for situational training applications. An overview of the project is presented, followed by a discussion of the various components, both hardware and software. Finally, a training application being developed utilizing the system is presented.


Author(s):  
Martin Hoppen ◽  
Juergen Rossmann ◽  
Michael Schluse ◽  
Ralf Waspe ◽  
Malte Rast

Using object-oriented databases as the primary data source in VR applications has a variety of advantages, but requires the development of new techniques concerning data modeling, data handling and data transfer from a Virtual Reality system’s point of view. The many advantages are outlined in the first part of this paper. We first introduce versioning and collaboration techniques as our main motivation. These can also be used in the traditional file based approach, but are much more powerful when realized with a database on an object and attribute level. Using an object-oriented approach to data modeling, objects of the real world can be modeled more intuitively by defining appropriate classes with their relevant attributes. Furthermore, databases can function as central communication hubs for consistent multi user interaction. Besides, the use of databases with open interface standards allows to easily cooperate with other applications such as modeling tools and other data generators. The second part of this paper focuses on our approach to seamlessly integrate such databases in Virtual Reality systems. For this we developed an object-oriented internal graph database and linked it to object-oriented external databases for central storage and collaboration. Object classes defined by XML data schemata allow to easily integrate new data models in VR applications at run-time. A fully transparent database layer in the simulation system makes it easy to interchange the external database. We present the basic structure of our simulation graph database, as well as the mechanisms which are used to transparently map data and meta-data from the external database to the simulation database. To show the validity and flexibility of our approach selected applications realized with our simulation system so far e. g. applications based on geoinformation databases such as forest inventory systems and city models, applications in the field of distributed control and simulation of assembly lines or database-driven virtual testbeds applications for automatic map generation in planetary landing missions are introduced.


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