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For hand–object interaction in real situations the interplay between the local tactile interaction and force interaction seems to be very important. In current haptic interfaces, however, two different trends are present: force feedback devices which offer a permanent invariable grip and a resultant force, and tactile devices, which offer variable...
Context in source publication
Context 1
... the simulation process, the same physical model running on the DSP controls both the tactile and the FF devices (see Fig. 3). The bi-directional input-output flow with the FFD is synchronized at model's computation frequency and consists in a zero delay closed-loop I/O digital flow. The refreshment of the simulation is done simultaneously at the same calculus step for both the tactile and the force. The tactile digital output flow is down-sampled at a lower ...
Citations
... Still referring to the tactile interfaces, the authors of [10] and [11] developed a pattern recognition device with tactile stimulation through the use of oriented pins, which, when in contact with the skin of visually impaired individuals, allow the identification of shapes. This practice suggests sensory replacement of vision by touch. ...
... In this context, it is worth highlighting the works related to this theme, which use touch as a communication mechanism in a linguistic code perspective (e.g., [6][7][8][9][10][11][12][13][14][15][16]). ...
The paper reports an experimental study that was carried out in Manaus (Amazonas, Brazil) with the participation of eight visually impaired athletes on 100 m sprint Paralympic races. A trajectory correction system was used, based on an accelerometer and a gyroscope for motion detection, an algorithm to track the athlete’s trajectories and a haptic actuator for the interaction with the athletes. The experimental results show the relevance in the use of this type of systems in Paralympic 100 m races for visually impaired athletes, mainly with the purpose of increasing their autonomy by mimicking their guides.
... Therefore these systems can be expected to only possess limited educational or training value. Authors like Liu and Khatchatourov [5,7] propose to render haptic information on large-areas by controlling the cues with respect to the position of the rendering element. Authors like Liu and Khatchatourov [5,7] propose to spatially-distributed haptic to extend the effective size toward large-areas. ...
... Authors like Liu and Khatchatourov [5,7] propose to render haptic information on large-areas by controlling the cues with respect to the position of the rendering element. Authors like Liu and Khatchatourov [5,7] propose to spatially-distributed haptic to extend the effective size toward large-areas. The technique is an alternative to costly devices with large footprints for the same render area. ...
Virtual Reality technology takes in an increasingly prominent role in modern medical training programs. The fidelity of the Virtual Reality environment is of crucial importance and directly relates to the quality of skill transfer. To train interventions that rely on physical interaction with the patient, high-quality haptic feedback should be provided. Palpation is a prototypical example of an important medical skill relying heavily on physical interaction. Since the interaction is quite involved and thus complex to render, very few training systems have attempted to train palpation so far and none of those provide a truly natural experience. In this work a novel haptic interface for free-hand palpation is presented. The interface follows the principle of an encountered-type robot replicating more naturally the actual palpation procedure. The concept and design of this new development are introduced. A control method to render spatially distributed kinaesthetic information is explained next. Experimental results give a proof-of-principle indicating that this approach might lead towards a more natural virtual palpation experience.
The capabilities of robots beyond the humans have rapidly increased its demand as well as expansion due to its potential in the field of hazardous environment, research work, space, medical, agriculture to various household works. The main focus of the robots has been the end effector or gripper of the hand as it is the part which connects the operator to the working environment and handle the work object. These days, most robots are equipped with grippers which enables it to perform variety of tasks and shows enhanced skills. Despite years of research, we are still not able to mimic the human hand behaviour to robotic grippers in order to deploy the versatility and dexterity with required amount of stability to achieve a successful grasping of objects and hence, a very interesting topic in the field of robotics is human hand and its performance. In this paper we review various robotic Multi finger grippers in terms of their geometrical information, degrees of freedom, grasping system and usability for the understanding of andromorphic hand. We also try to explore latest technological development and experiments in the field of robotic gripper in real world. The later part covers the limitation and the problem being faced at present research works that still need rectification for greater deployment of the robotic grippers.
The article presents the study results of cryptocurrencies dynamics, which are the most popular at the present time (Bitcoin, Ethereum and Ripple). The paper provides the opinions of various researchers regarding the economic nature of cryptocurrencies. Taking into account that the most significant drawback of modern cryptocurrencies is the high volatility of their market prices, the goal was to find an adequate method for forecasting cryptocurrency rates. Having analyzed an extensive selection of scientific articles on this topic and tested the cryptocurrency market for its information efficiency. The heterogeneous autoregressive model of realized volatility (HAR-RV) was first chosen as a working tool for predicting the rate of cryptocurrencies. To improve the accuracy of the forecast, it was additionally proposed to calculate the Shannon entropy based on the probabilities of a decrease in cryptocurrency market prices. The forecast accuracy by the proposed method exceeded all the most optimistic expectations. This method of calculating the market rate of cryptocurrencies will be useful to investors and speculators when making management decisions.
The Coupled Nature of the Kinesthetic and Tactile Feedback Force-Feedback Devices A Review of Recent and Advanced Tactile Displays References
Haptic enhanced boundaries are important for touch interaction. We quantify the amount of perceived force increment caused by adding variable friction tactile feedback to force feedback in simulating a boundary. We find that using a small lateral force feedback plus a tactile feedback can simulate a boundary which feels as stiff as that simulated by a large lateral force feedback. Moreover, the effect of the tactile feedback may be explained as a lateral force increment caused by increasing the friction coefficient of the touch surface.
Background:
Haptic feedback is of critical importance in surgical tasks. However, conventional surgical robots do not provide haptic feedback to surgeons during surgery. Thus, in this study, a combined tactile and kinesthetic feedback system was developed to provide haptic feedback to surgeons during robotic surgery.
Methods:
To assess haptic feasibility, the effects of two types of haptic feedback were examined empirically - kinesthetic and tactile feedback - to measure object-pulling force with a telesurgery robotics system at two desired pulling forces (1 N and 2 N). Participants answered a set of questionnaires after experiments.
Results:
The experimental results reveal reductions in force error (39.1% and 40.9%) when using haptic feedback during 1 N and 2 N pulling tasks. Moreover, survey analyses show the effectiveness of the haptic feedback during teleoperation.
Conclusions:
The combined tactile and kinesthetic feedback of the master device in robotic surgery improves the surgeon's ability to control the interaction force applied to the tissue. Copyright © 2014 John Wiley & Sons, Ltd.
