AIM The aim of the present study was to evaluate reactive hops under systematically modified acceleration conditions. It was hypothesized that a high preactivity of the leg extensors and phase-specific adjustments of the leg muscle activation would compensate the alterations caused by the various acceleration levels in order to maintain a high leg stiffness, thus enabling the jumper to perform ...

this paper develops an analytical method to calculate seismic bearing capacity of a strip footing, which is located on a slope reinforced with rows of pile. the resistance of passive pile is determined based on normal and shear stress of the soil around the pile, which is then compared to other analytical methods. this comparison indicates an acceptable agreement. the variants of the study incl...

The velocity of a moving point in a general path is the vector quantity, which has both magnitude and direction. The magnitude or the direction of the velocity vector can change over time as a result of acceleration that the time rate of velocity changes. Acceleration analysis is important because inertial forces and inertial torques are proportional to rectilinear and angular accelerations acc...

Table 1: Document Conventions x arena frame x position y arena frame y position z arena frame z position ẋ arena frame x velocity ẏ arena frame y velocity ż arena frame z velocity ẍ arena frame x acceleration ÿ arena frame y acceleration z̈ arena frame z acceleration xB vehicle frame x position yB vehicle frame y position zB vehicle frame z position ẋB vehicle frame x velocity ẏB vehicle frame y...

Table 1: Document Conventions x arena frame x position y arena frame y position z arena frame z position ẋ arena frame x velocity ẏ arena frame y velocity ż arena frame z velocity ẍ arena frame x acceleration ÿ arena frame y acceleration z̈ arena frame z acceleration xB vehicle frame x position yB vehicle frame y position zB vehicle frame z position ẋB vehicle frame x velocity ẏB vehicle frame y...

This study describes the onset process of auroral substorms in connection with the vertical evolution of auroral particle acceleration, on the basis of auroral kilometric radiation (AKR) dynamics. We show that the auroral acceleration process at substorm onset basically consists of two stages: (1) appearance/intensification of a low-altitude acceleration region at 4000–5000 km accompanied by in...

Currently, angular acceleration is believed to be more damaging to the brain than linear acceleration, even though both are present in any head impact. In a recent experiment, it was found that a helmeted head sustained the same degree of angular acceleration as the unhelmeted head for the same impact, but its linear acceleration was decreased significantly. So, if angular acceleration is the c...

The statistical properties of the Lagrangian acceleration vector of passive tracers in statistically steady rotating turbulence is studied by particle tracking velocimetry. Direct effects of the background rotation are the suppression of high-acceleration events parallel to the (vertical) rotation axis, the enhancement of high-acceleration events for the horizontal acceleration, and the strong ...