147 research outputs found
Haptic Feedback in Virtual Reality: An Investigation Into The Next Step of First Person Perspective Presence
Video games are becoming progressively sophisticated with new interesting
mechanics and increasingly realistic graphics. Game technologies manufacturers
are constantly striving to find innovative ways of providing additional layers of
interactivity, and engagement with the player. In video games haptic feedback
has traditionally been delivered by motors and pulleys through interfaces such
as steering wheels and joysticks, or via a simple vibration mechanism in the
controllers. However, while the growing popularity of commercial virtual reality
technologies has provided video game developers with a new modality to introduce
greater levels of immersion and presence into games, haptic technology in gaming
has kept to its traditional roots.
In this thesis we investigate the impact that haptic feedback has on player presence
within virtual reality environments. We introduce a non-intrusive haptic interface
that can be used alongside consumer grade virtual reality technology. This thesis
will demonstrate the implementation and technical considerations made during
the construction of this device. We then demonstrate the systems effectiveness
through a user study evaluating users reactions towards the system when compared
with traditional vibration-based haptics and with the absence of any feedback, in
a virtual reality game environment.
The results from this study show a positive impact on player presence when using
the non-intrusive haptic device, with broken down presence scores suggesting the
device was successful in delivering a satisfying haptic experience. Results also
indicate an improvement in the way participants perceive their own performance
when using the device, with presence scores suggesting this is due to participants
being able to fully place themselves in the experience
Augmented reality (AR) for surgical robotic and autonomous systems: State of the art, challenges, and solutions
Despite the substantial progress achieved in the development and integration of augmented reality (AR) in surgical robotic and autonomous systems (RAS), the center of focus in most devices remains on improving end-effector dexterity and precision, as well as improved access to minimally invasive surgeries. This paper aims to provide a systematic review of different types of state-of-the-art surgical robotic platforms while identifying areas for technological improvement. We associate specific control features, such as haptic feedback, sensory stimuli, and human-robot collaboration, with AR technology to perform complex surgical interventions for increased user perception of the augmented world. Current researchers in the field have, for long, faced innumerable issues with low accuracy in tool placement around complex trajectories, pose estimation, and difficulty in depth perception during two-dimensional medical imaging. A number of robots described in this review, such as Novarad and SpineAssist, are analyzed in terms of their hardware features, computer vision systems (such as deep learning algorithms), and the clinical relevance of the literature. We attempt to outline the shortcomings in current optimization algorithms for surgical robots (such as YOLO and LTSM) whilst providing mitigating solutions to internal tool-to-organ collision detection and image reconstruction. The accuracy of results in robot end-effector collisions and reduced occlusion remain promising within the scope of our research, validating the propositions made for the surgical clearance of ever-expanding AR technology in the future
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Background paper
This paper describes applications of synthetic-environment technologies in simulating combat. This background paper is the first of several publications of the OTA’S assessment of combat modeling and simulation
Haptics: Science, Technology, Applications
This open access book constitutes the proceedings of the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications, EuroHaptics 2020, held in Leiden, The Netherlands, in September 2020. The 60 papers presented in this volume were carefully reviewed and selected from 111 submissions. The were organized in topical sections on haptic science, haptic technology, and haptic applications. This year's focus is on accessibility
Aerospace medicine and biology: A continuing bibliography with indexes (supplement 359)
This bibliography lists 164 reports, articles and other documents introduced into the NASA Scientific and Technical Information System during Jan. 1992. Subject coverage includes: aerospace medicine and physiology, life support systems and man/system technology, protective clothing, exobiology and extraterrestrial life, planetary biology, and flight crew behavior and performance
Sixth Annual Workshop on Space Operations Applications and Research (SOAR 1992), volume 2
This document contains papers presented at the Space Operations, Applications, and Research Symposium (SOAR) hosted by the U.S. Air Force (USAF) on 4-6 Aug. 1992. The symposium was cosponsored by the Air Force Material Command and by NASA/JSC. Key technical areas covered during the symposium were robotics and telepresence, automation and intelligent systems, human factors, life sciences, and space maintenance and servicing. The SOAR differed from most other conferences in that it was concerned with Government-sponsored research and development relevant to aerospace operations. Symposium proceedings include papers covering various disciplines presented by experts from NASA, the USAF, universities, and industry
Haptics: Science, Technology, Applications
This open access book constitutes the proceedings of the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications, EuroHaptics 2020, held in Leiden, The Netherlands, in September 2020. The 60 papers presented in this volume were carefully reviewed and selected from 111 submissions. The were organized in topical sections on haptic science, haptic technology, and haptic applications. This year's focus is on accessibility
Augmented Reality (AR) for Surgical Robotic and Autonomous Systems: State of the Art, Challenges, and Solutions
Despite the substantial progress achieved in the development and integration of augmented reality (AR) in surgical robotic and autonomous systems (RAS), the center of focus in most devices remains on improving end-effector dexterity and precision, as well as improved access to minimally invasive surgeries. This paper aims to provide a systematic review of different types of state-of-the-art surgical robotic platforms while identifying areas for technological improvement. We associate specific control features, such as haptic feedback, sensory stimuli, and human–robot collaboration, with AR technology to perform complex surgical interventions for increased user perception of the augmented world. Current researchers in the field have, for long, faced innumerable issues with low accuracy in tool placement around complex trajectories, pose estimation, and difficulty in depth perception during two-dimensional medical imaging. A number of robots described in this review, such as Novarad and SpineAssist, are analyzed in terms of their hardware features, computer vision systems (such as deep learning algorithms), and the clinical relevance of the literature. We attempt to outline the shortcomings in current optimization algorithms for surgical robots (such as YOLO and LTSM) whilst providing mitigating solutions to internal tool-to-organ collision detection and image reconstruction. The accuracy of results in robot end-effector collisions and reduced occlusion remain promising within the scope of our research, validating the propositions made for the surgical clearance of ever-expanding AR technology in the future
Enabling wearable soft tactile displays with dielectric elastomer actuators
PhDTouch is one of the less exploited sensory channels in human machine
interactions. While the introduction of the tactile feedback would improve the
user experience in several fields, such as training for medical operators,
teleoperation, computer aided design and 3D model exploration, no interfaces
able to mimic accurately and realistically the tactile feeling produced by the
contact with a real soft object are currently available. Devices able to simulate
the contact with soft bodies, such as the human organs, might improve the
experience.
The existing commercially available tactile displays consist of complex
mechanisms that limit their portability. Moreover, no devices are able to provide
tactile stimuli via a soft interface that can also modulate the contact area with the
finger pad, which is required to realistically mimic the contact with soft bodies,
as needed for example in systems aimed at simulating interactions with virtual
biological tissues or in robot-assisted minimally invasive surgery.
The aim of this thesis is to develop such a wearable tactile display based on the
dielectric elastomer actuators (DEAs). DEAs are a class of materials that respond
to an electric field producing a deformation.
In particular, in this thesis, the tactile element consists of a so-called
hydrostatically coupled dielectric elastomer actuator (HC-DEAs). HC-DEAs rely
on an incompressible fluid that hydrostatically couples a DEA-based active part
to a passive part interfaced to the user.
The display was also tested within a closed-loop configuration consisting of a
hand tracking system and a custom made virtual environment. This proof of
concept system allowed for a validation of the abilities of the display.
Mechanical and psychophysical tests were performed in order to assess the
ability of the system to provide tactile stimuli that can be distinguished by the
users.
Also, the miniaturisation of the HC-DEA was investigated for applications in
refreshable Braille displays or arrays of tactile elements for tactile maps
Aerospace Medicine and Biology: A continuing bibliography with indexes, supplement 174
This bibliography lists 181 reports, articles, and other documents introduced into the NASA scientific and technical information system in November 1977
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