When humans perform movements and receive on-line visual feedback about their performance, the spatial qualities of the visual information alter performance. The spatial qualities of visual information can be altered via the manipulation of visual gain and changes in visual gain lead to changes in force error. The current study used functional magnetic resonance imaging during a steady-state pr...

This paper seeks to establish the quantitative effects of providing force feedback on user performance in human computer interaction. A reciprocal tapping test is employed in conjunction with Fitts' law in order to establish a measure of human performance in a simple target selection task. The test was performed using a PHANToM haptic interface, under conditions with and without the provision o...

The haptic-based sensing technology (HST) has the potential to be a powerful tool in Human-Computer Interaction (HCI). When developing a new product, the trend is to compress product development cycles and reduce costs. Virtual modeling, sometimes referred as digital prototyping, is widely used in industry for simulating the visual appearance and functionalities. Unfortunately, conventional vir...

Sensorimotor impairments are common in autism spectrum disorder (ASD), but they are not well understood. Here we examined force control during initial pulses and the subsequent rise, sustained, and relaxation phases of precision gripping in 34 individuals with ASD and 25 healthy control subjects. Participants pressed on opposing load cells with their thumb and index finger while receiving visua...

A PC-based orthopedic rehabilitation system was developed for use at home, while allowing for remote monitoring from the clinic. The home rehabilitation station has a Pentium II PC with graphics accelerator, Polhemus tracker, and a novel Multipurpose Haptic Control Interface with its own Pentium board. This interface is used to sample patient's hand positions and to provide resistive forces usi...

Pushing micro-objects using point contact provides more flexibility and less complexity compared to pick and place operation. Due to the fact that in micro-world surface forces are much more dominant than inertial forces and these forces are distributed unevenly, pushing through the center of mass of the micro-object may not yield a pure translational motion. In order to translate a micro-objec...

The endothelial lining of the vasculature is exposed to a large variety of biochemical and hemodynamic stimuli with different gradients throughout the vascular network. Adequate adaptation requires endothelial cells to be highly plastic, which is reflected by the remarkable heterogeneity of endothelial cells in tissues and organs. Hemodynamic forces such as fluid shear stress and cyclic strain ...

This paper presents a coupling method in order to establish force-feedback user interaction with a micromanipulator. The presented control scheme design is based on stability considerations and, hence, allows unconditional stable operation independently on the haptic interface, micromanipulator and scaling ratios on force and position. Experimental comparison of proposed coupling with a common ...

In face-to-face communication and collaboration people are used to being able to both see and hear other persons. People also take for granted the possibility to give objects to each other, to shake hands or to get someone’s attention by a pat on the shoulder. However, most systems for mediated collaboration do not take physicality into account. Now emerging media space technologies like threed...

Theoretical control algorithms are developed and an experimental system is described for 6-dof kinesthetic force/moment feedback to a human operator from a remote system. The remote system is a common six-axis slave manipulator with a force/torque sensor, while the haptic interface is a unique, cable-driven, seven-axis, force/moment-reflecting exoskeleton. The exoskeleton is used for input when...