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In multimodal virtual-reality, augmented-reality, and tele-operation systems, a temporal asynchrony often exists between visual and haptic feedback due to differences in processing and rendering the two types of signals. We have conducted two psychophysical experiments to examine how such asynchrony influences our perceptual experience with an object's stiffness. Participants explored a virtual elastic...
Communication delay in network is inevitable issue and it causes discomfort in manipulation of teleoperation systems. One of the solutions for this problem is decorator. Decorator is a technique to decrease the discomfort by modifying visual or auditory feedback based on the other information, which is transmitted with shorter delay, to its operator. In the former study, the artificial modification...
Severe low vision patient cannot read a text clearly. Thus, an instrument engineered for them should have an extra function to read aloud the text. Nowadays, Bahasa Indonesia is still not supported properly in any text to speech modul. This ongoing research is trying to develop an Indonesian text to speech with syllable concatenation. The input of the system comes from a plain text file or manually...
Virtual Reality (VR) technology has great potential as a tool for training. Remote haptic virtual environments (VE) allow multiple users to interact in the same virtual space to accomplish tasks. Combining these ideas, it is possible to apply a remote VE to connect skilled trainers with remote trainees for training. In this paper we examined guided haptic training as an interaction method where one...
Force feedback systems have been developed to improve the user-friendliness of robotic surgery systems. In teleoperative surgery, one of the major problems is the delay of the transmission of the information from the operation site to the surgery site. The transmission delays of the control signal and force information are less than the that of the image signal. In many cases, the visual information...
Visual delays are unavoidable in augmented reality setups and occur in different steps of the rendering pipeline. In the context of haptic interaction with virtual objects, it has been shown that delayed force feedback can alter the perception of object stiffness. We hypothesize that delays in augmented reality systems can have similar consequences. To test this, we carried out a user study to investigate...
The purpose of these experiments was to investigate the minimum duration of haptic memory representations. The term haptic memory can be defined as the ability to retain impressions of haptically acquired information after the original stimulus is absent. Participants repeatedly picked up objects of various masses. The time interval between the final practice lift of each object and a test lift was...
Most network operators have considered reducing Label Switched Routers (LSR) label spaces (i.e. the number of labels that can be used) as a means of simplifying management of underlaying Virtual Private Networks (VPNs) and, hence, reducing operational expenditure (OPEX). This letter discusses the problem of reducing the label spaces in Multiprotocol Label Switched (MPLS) networks using label merging...
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