In the present study, we investigate a control mechanism that dampens hand vibrations. Here, we propose a control method with two components to suppress hand vibrations. The first is a passive suppression method that lowers the joint stiffness to passively dampen the hand vibrations. The second is an active suppression method that adjusts an equilibrium point based on skyhook control to activel...

Most of the knowledge on falls of older persons has been obtained from oral reports that might be biased in many ways. Fall simulations are widely used to gain insight into circumstances of falls, but the results, at least concerning fall detection, are not convincing. Variation of acceleration and maximum jerk of 5 real-world backward falls of 4 older persons (mean age 68.8 years) were compare...

PURPOSE Infantile nystagmus syndrome (INS) is characterized by involuntary eye oscillations that can assume different waveforms. Previous attempts to uncover reasons for the presence of several nystagmus waveforms have not led to a general consensus in the community. Recently, we characterized the belladonna (bel) zebrafish mutant strain, in which INS-like ocular motor abnormalities are caused ...

This paper presents a cubic spline trajectory generation algorithm that produces continuous position, velocity, and acceleration profiles for 3-axis CNC machines with confined axis jerk and tracking error. A series of reference knots are connected using cubic spline functions in time t for constructing axis trajectories. They are generated in such a way that continuity up to the second derivati...

from time to time. It seemed probable that these " rheumatic pains," and not the lightning pains of ta^'0yal He had been treated in the Lock Wards of the Infirmary for syphilis, a chancre followed by secondary toms, in 1894. Upon examination, it was found that the pup1 unequal, the right measuring 3 mm., the left 2 tnfn' inequality of the pupils was very possibly, however, Innot * symptom produ...

A method for synthesizing a string of letters in script style is developed based on the minimum principle for handwriting, whereby the pen motion is organized so as to minimize the integral of squared jerk subject to visiting a series of spatial points. Let the series of spatial points characterizing a string be a concatenation of those taken from individual letters. The pen motion is best expr...

L.F. Dell’Osso, Ph.D., Professor Emeritus of Neurology Daroff-Dell’Osso Ocular Motility Laboratory Louis Stokes Cleveland Veterans Affairs Medical Center 10701 East Boulevard, Cleveland, OH 44106 USA Telephone: (216) 421-3224—FAX: (216) 231-3461 E-mail: [email protected]—Web Site: www.omlab.org forms, where the jerk slow phases are usually increasing velocity (or “runaway”) exponentials. These accel...

In this paper we propose a method, based on both physiologic and engineering considerations, for the motion planning of a prosthetic finger. In particular, we exploit a minimum jerk approach to define the trajectory in the Cartesian space. Then, cubic splines are adopted in the joint space. The redundancy problem arising from the presence of three links is solved by assuming that there is a con...