The rigid rod model of dislocation motion is used -to unify, simplify and clarify various types of theories of dislocation damping effects. It leads to a simple Debye-type relaxation process for overdamped resonance. Deviations from the rigid rod phenomenological formalism are found in cases where restoring or viscous forces act at discrete points rather than continuously, and they are evaluate...

The facing-in-depth of point-light biological motion is ambiguous: the frontal and back view look the same. However, since earlier studies found a very strong perceptual bias in point-light biological motion, it is unknown whether it evokes an alternating (bistable) percept. In the present study, naive, untrained observers viewed point-light stimuli in half-profile view. All participants experi...

In this report the transient rocking response of electrical equipment subjected to trigonometric pulses and near-source ground motions is investigated in detail. First the rocking response of a rigid block subjected to a half-sine pulse motion is reviewed. It is shown that the solution presented by Housner (1963) for the minimum acceleration amplitude of a half-sine pulse that is needed to over...

We investigated the most effective rocking motion for inducing sleep in adults. We prepared ten types of rocking motions, including two types of mother’s rocking motions. The sleep-inducing effect of all the rocking motions was evaluated using Thurstone’s paired comparison method (Case V). From statistical analysis of the subjective experimental results we found that, of the ten types of rockin...

This paper investigates the complex dynamical behavior of a rigid block structure under harmonic ground excitation, thereby mimicking, for instance, oscillation system seismic excitation or containers placed on ship periodic acting sea waves. The equations motion are derived, assuming large frictional coefficient at interface between and ground, in such way that sliding cannot occur. In additio...

STUDY DESIGN Biomechanical study. OBJECTIVE Recently, a posterior concave periapical distraction device for fusionless scoliosis correction was introduced. The goal of this study was to quantify the effect of the periapical distraction device on spinal range of motion (ROM) in comparison with traditional rigid pedicle screw-rod instrumentation. METHODS Using a spinal motion simulator, 6 hum...

Abstract By calculating the kinetic and potential energies, applying Lagrangian mechanics, with Euler-Lagrange equations, we obtained equations that were used to analyze pendulum motion of a mechanical system consisting an arrangement three rigid rods, two them equal mass m length l , which behave like physical pendulums, are joined by means third, rod M L . In latter, there is square block can...