Global ETD Search

11	Augmenting low-fidelity flight simulation training devices via amplified head rotations Le-Ngoc, Luan January 2013 (has links) Due to economic and operational constraints, there is an increasing demand from aviation operators and training manufacturers to extract maximum training usage from the lower fidelity suite of flight simulators. It is possible to augment low-fidelity flight simulators to achieve equivalent performance compared to high-fidelity setups but at reduced cost and greater mobility. In particular for visual manoeuvres, the virtual reality technique of head-tracking amplification for virtual view control enables full field-of-regard access even with limited field-of-view displays. This research quantified the effects of this technique on piloting performance, workload and simulator sickness by applying it to a fixed-base, low-fidelity, low-cost flight simulator. In two separate simulator trials, participants had to land a simulated aircraft from a visual traffic circuit pattern whilst scanning for airborne traffic. Initially, a single augmented display was compared to the common triple display setup in front of the pilot. Starting from the base leg, pilots exhibited tighter turns closer to the desired ground track and were more actively conducting visual scans using the augmented display. This was followed up by a second experiment to quantify the scalability of augmentation towards larger displays and field of views. Task complexity was increased by starting the traffic pattern from the downwind leg. Triple displays in front of the pilot yielded the best compromise delivering flight performance and traffic detection scores just below the triple projectors but without an increase in track deviations and the pilots were also less prone to simulator sickness symptoms. This research demonstrated that head augmentation yields clear benefits of quick user adaptation, low-cost, ease of systems integration, together with the capability to negate the impact of display sizes yet without incurring significant penalties in workload and incurring simulator sickness. The impact of this research is that it facilitates future flight training solutions using this augmentation technique to meet budgetary and mobility requirements. This enables deployment of simulators in large numbers to deliver expanded mission rehearsal previously unattainable within this class of low-fidelity simulators, and with no restrictions for transfer to other training media. 629.132
12	Etude des lois de commande de la plateforme de simulation de conduite et influence sur le mal de simulateur / Study of control command of dynamic platform for driving simulation and influence on simulator sickness Aykent, Baris 16 December 2013 (has links) La simulation de conduite est fortement utilisée dans la recherche et le développement pour l'industrie automobile. Les simulateurs de conduite sont utilisés pour évaluer les prototypes véhicules pour la dynamique du véhicule et les systèmes d'aide à la conduite. Cependant, l'utilisation des simulateurs de conduite induit une problématique scientifique qui peut limiter son développement. En raison de son principe même, le simulateur de conduite ne restitue pas des mouvements du véhicule à l'échelle 1. Ce verrou cause des phénomènes de mal du simulateur qu'il est important d'étudier.Cette thèse propose d'étudier des méthodes et outils à mettre en œuvre dans les simulateurs de conduite statique ou dynamique. De cette mise en œuvre, des études sur le mal du simulateur sont menées grâce à des mesures objectives (via un capteur de suivi de mouvement, plate-forme de stabilité du corps, électromyographie) et subjectives (par l'intermédiaire de questionnaires). Des solutions algorithmiques et matérielles sont proposées et évaluées dans le contexte de la simulation de conduite.Les approches proposées dans cette thèse pour réduire le mal du simulateur sont:- Elaborer et évaluer les algorithmes de contrôle de la plate-forme mobile hexapode: sept algorithmes différents sont mis en œuvre.- Mesurer les effets liés au mal de simulateur sur les sujets aux niveaux vestibulaire, neuromusculaire et posturale.- Evaluer l'influence de l'implication des sujets sur le mal de simulateur (conducteurs et passagers). / Simulation has been intensively involved nowadays in research and development for automotive industry. Driving simulators are one of those simulation techniques which are used to evaluate the prototypes for the vehicle dynamics and driving assistance systems. However with the driving simulator, there is a lock associated with its use. Because representing a permanent scenario as scale 1 is quite difficult. Because of that difficulty, motion/simulator sickness is an inevitably important topic to study.This thesis proposes to explore methods and tools to implement in static or dynamic simulators. In this implementation, studies of simulator sickness are conducted with objective measures (via a motion tracking sensor, platform for body stability, electromyography) and subjective (through questionnaires). These algorithmic or hardware solutions studies should be defined and applied at simulators. The proposed approaches to reduce or avoid simulator sickness in this thesis are:- Building control algorithms of motion hexapod platform: seven different algorithms are implemented.- Measuring the effects of inertia on subjects at vestibular, neuromuscular and postural levels.- Assessing the involvement of subjects (drivers and passengers). Simulateur de conduite Controle dynamique Interaction Immersion virtuelle Mal de simulateur Driving simulation Dynamic control Interaction Virtual immersion Simulator sickness
13	Bicycle simulator study with older adults Suing, Martina 02 January 2023 (has links) This feasibility study reports on the first experimental experiences with the BASt bicycle simulator. Since older cyclists represent an important target group in road safety due to their increased vulnerability, both cyclists aged 65 and over (experimental group: EG) and, by way of comparison, middle-aged test subjects aged 25--50 (cont.rol group: CG) were included in the study. The study aims to gain initial insights into the prerequisites, possibilities and limitations for using the bicycle simulator to observe cycling behaviour. In addition to the actua1 test ride the three preceding pra.ctice rides were also evaluated. A comparable study with older adults has already been conducted with the BASt car simulator.
14	An Evaluative Study on the Impact of Immersion and Presence for Flight Simulators in XR Dahlkvist, Robin January 2023 (has links) Flight simulators are a central training method for pilots and with the advances of human-computer interaction, new cutting-edge technology introduces a new type of simulator using extended reality (XR). XR is an umbrella term for many representative forms of realities, where physical reality (PR) and virtual reality (VR) are the endpoints of this spectrum, and any reality in between can be seen as mixed reality (MR). The purpose of this thesis was to investigate the applicabilities of XR and how they can be compared with each other in terms of usability, immersion, presence, and simulator sickness for flight simulators, respectively. To answer these questions, a MR and a VR version was implemented in Unity using the Varjo XR-3 head-mounted display based on the Framework for Immersive Virtual Environments (FIVE). To evaluate these aspects, a user study (N = 11) was conducted, focusing on quantitative and qualitative experimental research methods. Interaction with physical interfaces is a core procedure for pilots; thus, three reaction tests were conducted with the goal of pressing a random button that is lit green for a 3 x 3 Latin square layout for a given time to measure the efficiency of interaction for both versions. Reaction tests were conducted in different complexities: Simple (no flight), moderate (easy flight), and advanced (difficult flight). Participants experienced the MR and VR versions, and completed complementary questionnaires on immersion, presence, and simulator sickness while remaining in the simulation. The user study showed that the usability in MR is considerably higher, and more immersive than VR when incorporating interaction. However, excluding the interaction aspects showed that VR was more immersive. Overall, this work demonstrates how to achieve high levels of immersion, and a high elicitation of sense of presence, simultaneously while having minuscule levels of simulator sickness with a relatively realistic experience. / Flygsimulatorer är en central träningsmetod för piloter, och med framsteg inom människa-datorinteraktion introduceras ny, toppmodernt teknik som använder utökad verklighet (XR) för en ny typ av simulator. XR är ett samlingsbeteckning för många olika former av verkligheter, där den fysiska verkligheten (PR) och den virtuell verklighet (VR) är ändpunkterna på detta spektrum, och alla verkligheter däremellan kan ses som blandad verklighet (MR). Syftet med denna avhandling var att undersöka tillämpbarheten av XR och hur de kan jämföras med varandra när det gäller användbarhet, immersion, närvaro och simulatorsjuka för flygsimulatorer. För att besvara dessa frågor implementerades en MR- och en VR-version i Unity med hjälp av Varjo XR-3 huvudmonterad display baserat på ramverket för immersiva virtuella miljöer FIVE. För att utvärdera dessa aspekter genomfördes en användarstudie (N = 11), med fokus på kvantitativa och kvalitativa experimentella forskningsmetoder. Interaktion med fysiska gränssnitt är en kärnprocedur för piloter; Därför genomfördes tre reaktionstester med målet att trycka på en slumpmässig knapp som lyser grönt för en 3 x 3 latinsk kvadrat under en given tid för att mäta interaktionens användbarhet för båda versionerna. Reaktionstesterna genomfördes under olika komplexiteter: Enkel (utan flygning), måttlig (enkel flygning) och avancerad (svår flygning). Deltagarna upplevde MR- och VR-versionerna och fyllde i kompletterande enkäter om immersion, närvaro och simulatorsjuka medan de var kvar i simuleringen. Användarstudien visade att användbarheten i MR är betydligt högre och mer immersiv än i VR när man inkluderar interaktion. Exkluderar man interaktionsaspekter visade det sig att VR var mer immersiv. Sammantaget visar detta arbete hur man kan uppnå höga nivåer av immersion och hög framkallning av sinnesnärvaro samtidigt som man har minimala nivåer av simulatorsjuka med en relativt realistisk upplevelse. Extended reality Mixed reality Immersion Presence Simulator sickness Extended reality Mixed reality Immersion Närvaro Simulatorsjuka Computer and Information Sciences Data- och informationsvetenskap
15	The Influence of Stimulus Complexity and Perception-action Coupling on Postural Sway Otten, Edward W. 13 August 2008 (has links) No description available. Virtual Environments Virtual Reality Motion Sickness Simulator Sickness Posture Postural Sway Postural Control Postural Coordination Optic Flow
16	Developing a Virtual Reality Bicycle Simulator in Unity for Traffic Safety Research Integration Norén, Hampus January 2022 (has links) This thesis focuses on the development and utilization of a virtual reality bicycle simulator for the purposes of traffic safety research. The bicycle simulator is developed using a virtual reality head mounted display (HMD) and commercially available hardware and software in the Unity framework. An experiment was conducted by exposing 24 participants to select scenarios in a virtual environment that were constructed to imitate a real-world location in Lund, Sweden. Observing the effects in term of immersion and cybersickness in relation to development. Recordings from drones were used to capture real life traffic from the location that were tracked and implemented into Unity for increased realism. The participants answered questionnaires incorporating VRSQ: Virtual reality sickness questionnaire and SPES: The spatial presence experience scale. The results indicate that the induced cybersickness is similar to, but slightly lower than that of average mean simulator sickness questionnaire (SSQ) results. SPES showed generally positive results, average answer being 3.6 on a scale from 1-5. VR Virtual reality Bicycle simulator Immersion Presence Cybersickness Simulator sickness VRSQ SPES Unity Digital twin Video analysis Computer Sciences Datavetenskap (datalogi)
17	Aufbau eines medizinischen Virtual Reality-Labors und Entwicklung eines VR-gestützten neuropsychologischen Testsystems mit einer präklinischen und klinischen Evaluationsstudie / Setup of a medical Virtual Reality laboratory and development of a VR-supported neuropsychological test system with a preclinical and clinical evaluation study Mehlitz, Marcus 24 October 2004 (has links) No description available. Medicine 610 Medizin Gesundheit 44.03 MED 250: Medizinische Informatik
18	Mitigating VR Cybersickness Caused by Continuous Joystick Movement Aditya Ajay Oka (16529664) 13 July 2023 (has links) <p>When users begin to experience virtual reality (VR) for the first time, they can be met with some degree of motion sickness and nausea, especially if continuous joystick locomotion is used. The symptoms that are induced during these VR experiences fall under the umbrella term cybersickness, and due to these uncomfortable experiences, these users can get a bad first impression and abandon the innovative technology, not able to fully appreciate the convenience and fascinating adventures VR has to offer. As such, this project compares the effects of two cybersickness mitigation methods (Dynamic Field of View (FOV) and Virtual Reference Frame), both against each other and combined, on user-reported cybersickness symptoms to determine the best combination to implement in commercial applications to help create more user-friendly VR experiences. The hypothesis is that combining the FOV reduction and the resting frame methods can mitigate VR cybersickness more effectively without hindering the user’s experience and the virtual nose method is more potent at mitigating cybersickness compared to dynamic FOV. To test these hypotheses, an experimental game was developed for the Meta Quest 2 with five levels: a tutorial level and four maze levels (one for each scenario). The participants were asked to complete the tutorial level until they got used to the virtual reality controls, and then they were instructed to complete the maze level twice with one of the following conditions for each run: no method, dynamic field of view only, virtual nose only, and dynamic field of view and virtual nose combined. After completing each maze trial, the participants were asked to complete a simulator sickness questionnaire to get their thoughts on how much sickness they felt during the test. Upon concluding the testing phase with 36 participants and compiling the data, the results showed that while the subjects preferred the dynamic FOV method even though they were able to complete the trials significantly faster with the virtual nose method, it is inconclusive regarding which method is truly more effective. Furthermore, the results showed that it is also inconclusive if the scenario with both methods enabled is significantly better or worse than either method used separately.</p> Computer graphics Entertainment and gaming Virtual and mixed reality cybersickness mitigation methods maze trial Meta Quest 2 Unity virtual nose reference frame joystick movement motion sickness nausea virtual enviroment (VE) virtual reality (VR) field of view (FOV) dynamic FOV simulator sickness questionnaire (SSQ) head mounted display (HMD) VR locomotion continuous movement joystick control
19	Investigating the Relationship between Binocular Disparity, Viewer Discomfort, and Depth Task Performance on Stereoscopic 3D Displays McIntire, John Paul 04 June 2014 (has links) No description available. Psychology Quantitative Psychology Robotics Robots Scientific Imaging Technology Behavioral Sciences Cognitive Psychology Engineering Experimental Psychology Experiments Medical Imaging Ophthalmology Optics stereoscopy binocular vision phoria vergence fusion optometry 3D depth perception spatial vision display design virtual camera teleoperation microstereopsis orthostereopsis virtual environment simulator sickness viewer discomfort
20	Implementation and Analysis of Co-Located Virtual Reality for Scientific Data Visualization Jordan M McGraw (8803076) 07 May 2020 (has links) <div>Advancements in virtual reality (VR) technologies have led to overwhelming critique and acclaim in recent years. Academic researchers have already begun to take advantage of these immersive technologies across all manner of settings. Using immersive technologies, educators are able to more easily interpret complex information with students and colleagues. Despite the advantages these technologies bring, some drawbacks still remain. One particular drawback is the difficulty of engaging in immersive environments with others in a shared physical space (i.e., with a shared virtual environment). A common strategy for improving collaborative data exploration has been to use technological substitutions to make distant users feel they are collaborating in the same space. This research, however, is focused on how virtual reality can be used to build upon real-world interactions which take place in the same physical space (i.e., collaborative, co-located, multi-user virtual reality).</div><div><br></div><div>In this study we address two primary dimensions of collaborative data visualization and analysis as follows: [1] we detail the implementation of a novel co-located VR hardware and software system, [2] we conduct a formal user experience study of the novel system using the NASA Task Load Index (Hart, 1986) and introduce the Modified User Experience Inventory, a new user study inventory based upon the Unified User Experience Inventory, (Tcha-Tokey, Christmann, Loup-Escande, Richir, 2016) to empirically observe the dependent measures of Workload, Presence, Engagement, Consequence, and Immersion. A total of 77 participants volunteered to join a demonstration of this technology at Purdue University. In groups ranging from two to four, participants shared a co-located virtual environment built to visualize point cloud measurements of exploded supernovae. This study is not experimental but observational. We found there to be moderately high levels of user experience and moderate levels of workload demand in our results. We describe the implementation of the software platform and present user reactions to the technology that was created. These are described in detail within this manuscript.</div> Software Engineering Computer Software Computer Graphics Simulation and Modelling Virtual Reality and Related Simulation Mobile Technologies Networking and Communications Computer-Human Interaction Collaborative Virtual Reality Virtual Reality Collaborative Virtual Reality Networking Networked VR Mulitplayer Multiplayer VR Data Visualization Data Exploration Head Mounted Display Cyberspace Augmented Reality Emerging Technologies Consumer Devices Virtual Environment Virtual Aesthetics Collaborative VR Simulation Training Simulation and Training Colocated Colocated Virtual Environment Immersive Media Immersive Technology Collaborative Tools Educational Virtual Environment Point Cloud Representations Isosurface Representations Mesh Smoothng Supernova Supernovae Supernova Remnant Modeling Astronomy and Astrophysics Cassiopeia N132D E0102 Crab Nebula CAVE CAVE Theater Mobile VR Virtual Classrooms STEM Workload Workload Assessment Tool Presence Engagement Immersion Experience Consequence Simulator sickness Simulator Sickness Questionnaire NASA TLX NASA Task Load Index Unified User Experience Quesionnaire Modified User Experience Questionnaire Oculus Oculus Go Oculus Quest Novel Solutions Optitrack Motive Motion Capture Mocap User Experience Unity3D Game Engine Lidgren Room Scale VR Hall Scale VR Co-location Colocation Virtual Training Collaborative Virtual Environments Shared Virtual Environments Collaboration Whiteboard Mobile Virtual Reality VR HMD LAN UX CSCL UXQ TLX AR VE CVE 3D UI EVE

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