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Book ChapterDOI

Passive Probing Perception: Effect of Latency in Visual-Haptic Feedback

13 Jun 2018-pp 186-198
Abstract: Latency is detrimental to haptic systems, specifically in networked telepresence systems. Although the latency effect on stiffness is well studied in the literature, it is not very clear if the latency effects on the stiffness perception are due to the displacement perception or the force perception. In this study, we propose passive probing which involves force perception alone, without any displacement of the finger, for studying latency effects. A psychophysical experiment is conducted with a set of artificially induced latencies which provides a quantitative measure of the effect of these latencies on three parameters: Just Noticeable Difference (JND), the time taken to reach the reference forces and the maximum overshoot. The results showed that the latency has a significant effect on the user ability in task performance after 185.5 ms. From the observation, the latency effect on JND in passive probing is similar to that of the stiffness perception (active probing) task which shows that the effect is significantly higher on the force perception rather than on the displacement perception.
Citations
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Journal ArticleDOI
TL;DR: To reduce VKC during scaled movements, tasks should be designed such that the visual awareness of the real hand is avoided.
Abstract: Considering 3D interactions in Virtual-Reality (VR), it is critical to study how visual awareness of real hands influences users scaled interaction performance in different VR environments. We used...

Journal ArticleDOI
TL;DR: A novel method of training fine‐motor skills such as Microscopic Selection Task (MST) for robot‐assisted surgery using virtual reality (VR) with objective quantification of performance is proposed.
Abstract: BACKGROUND Training surgeons to use surgical robots are becoming part of surgical training curricula. We propose a novel method of training fine-motor skills such as Microscopic Selection Task (MST) for robot-assisted surgery using virtual reality (VR) with objective quantification of performance. We also introduce vibrotactile feedback (VTFB) to study its impact on training performance. METHODS We use a VR-based environment to perform MST with varying degrees of difficulties. Using a well-known human-computer interaction paradigm and incorporating VTFB, we quantify the performance: speed, precision and accuracy. RESULTS MST with VTFB showed statistically significant improvement in performance metrics leading to faster completion of MST with higher precision and accuracy compared to that without VTFB. DISCUSSION The addition of VTFB to VR-based training for robot-assisted surgeries may improve performance outcomes in real robotic surgery. VTFB, along with proposed performance metrics, can be used in training curricula for robot-assisted surgeries.

References
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Book
01 Dec 2015-
Abstract: Contents: Preface. Psychophysical Measurement of Thresholds: Differential Sensitivity. Psychophysical Measurement of Thresholds: Absolute Sensitivity. The Classical Psychophysical Methods. Classical Psychophysical Theory. The Theory of Signal Detection. Further Considerations of TSD. Procedures of TSD. Some Applications of TSD. The Measurement of Sensory Attributes and Discrimination Scales. Partition Scales. Psychophysical Ration Scaling. Evaluation of Ratio Scaling Methods. The Psychophysical Law. Some Fundamental Issues in Psychophysical Scaling.

1,062 citations


Journal ArticleDOI
TL;DR: The paper outlines the key technical requirements and architectural approaches for the Tactile Internet, pertaining to wireless access protocols, radio resource management aspects, next generation core networking capabilities, edge-cloud, and edge-AI capabilities.
Abstract: The long-term ambition of the Tactile Internet is to enable a democratization of skill, and how it is being delivered globally. An integral part of this is to be able to transmit touch in perceived real-time, which is enabled by suitable robotics and haptics equipment at the edges, along with an unprecedented communications network. The fifth generation (5G) mobile communications systems will underpin this emerging Internet at the wireless edge. This paper presents the most important technology concepts, which lay at the intersection of the larger Tactile Internet and the emerging 5G systems. The paper outlines the key technical requirements and architectural approaches for the Tactile Internet, pertaining to wireless access protocols, radio resource management aspects, next generation core networking capabilities, edge-cloud, and edge-AI capabilities. The paper also highlights the economic impact of the Tactile Internet as well as a major shift in business models for the traditional telecommunications ecosystem.

547 citations


6


Journal ArticleDOI
01 Apr 2002-Annals of Surgery
TL;DR: Future developments of computer technology and their surgical applications, particularly in the field of virtual reality three-dimensional reconstructions of patient’s specific anatomy and pathology, are the possible solutions to overcome the lack of direct patient-surgeon contact.
Abstract: Remote robot-assisted telesurgery is feasible and safe using terrestrial telecommunication lines, even through transcontinental distances. In addition to several potential benefits for the patient, remote surgery might improve surgical training and education. Future developments of computer technology and their surgical applications, particularly in the field of virtual reality three-dimensional reconstructions of patient’s specific anatomy and pathology, are the possible solutions to overcome the lack of direct patient-surgeon contact. Indeed, virtual reality systems may not only improve surgical performance by allowing preoperative simulations and rehearsal of surgical procedures ahead of time, but may also allow, thanks to real-time Internet teleconsultations, active intervention of the operating surgeon in the diagnostic process and in the evaluation of indications and contraindications to surgery.

346 citations


Proceedings ArticleDOI
18 Mar 2000-
Abstract: This paper considers whether a passive isometric input device, such as a Spaceball/sup TM/, used together with visual feedback, could provide the operator with a pseudo-haptic feedback. For this aim, two psychophysical experiments have been conducted. The first experiment consisted of a compliance discrimination, between two virtual springs hand-operated by means of the Spaceball/sup TM/. In this experiment, the stiffness (or compliance) JND turned out to be 6%. The second experiment assessed stiffness discrimination between a virtual spring and the equivalent spring in reality. In this case, the stiffness (or compliance) JND was found to be 13.4%. These results are consistent with previous outcomes on manual discrimination of compliance. Consequently, this consistency reveals that the passive apparatus that was used can, to some extent, simulate haptic information. In addition, a final test indicated that the proprioceptive sense of the subjects was blurred by visual feedback. This gave them the illusion of using a nonisometric device.

298 citations


8


Book
30 Sep 2011-
TL;DR: Biomechanics and neural control of posture and movement / , Biomechanic and neural controlled movement and the role of the autonomic nervous system in human movement is studied.
Abstract: Biomechanics and neural control of posture and movement / , Biomechanics and neural control of posture and movement / , کتابخانه دیجیتال جندی شاپور اهواز

242 citations


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20202