A new approach is developed to integrate numerically the equations of motion for systems of interacting rigid polyatomic molecules. With the aid of a leapfrog framework, we directly involve principal angular velocities into the integration, whereas orientational positions are expressed in terms of either principal axes or quaternions. As a result, the rigidness of molecules appears to be an int...

Foveal stimuli were used to elicit fusional convergence movements of the left eye in 5 subjects icith normal binocular vision. The amplitude of fusional convergence was measured by recording eye position. The eyes were light adapted, and the stimulus to the left eye was driven at angular velocities ranging from 1/8 to 6 degrees per second. Although large individual differences were found in the...

An alternative to inverse-dynamics joint-torques estimation in human stance is proposed. This alternative is based on unknown-input observers which, from measurements of the angular positions, allow real-time estimation of joint torques and angular velocities. To design the aforementioned observer, a nonlinear state-space dynamical descriptor model is proposed. The descriptor model is then writ...

We present a catalogue of astrophysical data of 520 Galactic open clusters. These are the clusters, for which at least three most probable members (18 on average) could be identified in the ASCC-2.5, a catalogue of stars based on the Tycho-2 observations from the Hipparcos mission. We applied homogeneous methods and algorithms to determine angular sizes of cluster cores and coronae, heliocentri...

relationships in such a way as to yield a system of equations which describes the velocity and angular velocity of the manipulated object as functions of the robot's joint velocities. The inverse kinematic problem results in a system of equations describing the joint velocities as functions of the object's translational and angular velocities. In both cases it is assumed that the positions of t...

Sedentary adult males with spinal lesions, all habitual wheelchair users, were allocated to exercise (n = 11) and control (n = 4) groups. A Cybex II dynamometer was used to assess peak power, average power, total work and muscular endurance for elbow flexion/extension, shoulder flexion/extension and shoulder abduction/adduction at five angular velocities, on recruitment and after eight and 16 w...

Drosoplriln, Tracking, Computer Reconstruction, Saccades, Free Flight We have developed a computer system for reconstructing and analyzing three dimensional flight trajectories of flies. Its application to the study of the free flight behaviour of the fruitfly Drosophiln rnelnnogaster is described. The main results are: a) Drosophila males only occasionally track other flies; b) in such cases t...

I propose a mechanism for axisymmetrical mass loss on the asymptotic giant branch (AGB), that may account for the axially symmetric structure of elliptical planetary nebulae. The proposed model operates for slowly rotating AGB stars, having angular velocities in the range of 10ωKep <∼ ω <∼ 10 ωKep, where ωKep is the equatorial Keplerian angular velocity. Such angular velocities could be gained ...

Mini and micro robots, which can swim in an underwater environment, have drawn widespread research interests because of their potential applications to the clinical drug delivery, biotechnology, manufacturing, mobile sensor networks, etc. In this paper, a prototype of microrobot based on the motion principle of living microorganisms such as E. Coli Bacteria is presented. The properties of this ...

The torque-velocity relationship has been widely considered as reflecting the mechanical properties of the contractile apparatus, and the influence of tendinous tissues on this relationship obtained during in vivo experiments remains to be determined. This study describes the pattern of shortening of various muscle-tendon unit elements of the triceps surae at different constant angular velociti...