Central motions

Flat Central Configurations of Four Planet Motions

Abst rac t . The flat central configurations of four planet motions are investigated with ~¥u's elimination method. ~¥e obtain 12 collinear central configurations and a necessary condition for determining flat but noncollinear central configurations. We also prove that the number of central configurations in planet motions of 4 bodies is finite under the condition that the masses and angular ve...

[Motions].

Direct programming of a central pattern generator for periodic motions by touching

Much of the literature shows that Central Pattern Generators (CPGs) are a good approach for generating periodic motions for legged robots. In most of the presented works the numerous CPG parameters are set by automatic techniques like genetic algorithms. This gives the user little control over the resulting motions, since all of the desired features of the motion must be encoded by a fitness/sc...

Stability of Asteroid Motions

In this paper it is explained how most of asteroids can avoid very close approach to Jupiter, to the earth for earth orbit crossing asteroids, and to Neptune for Kuiper-belt asteroids by mechanisms which work also for Neptune-Pluto system. In fact the mutual distance of the planets cannot become very small as the critical argument librates around 180 0 because of 2:3 mean motion resonance and t...

Going through the motions.

doi:10.1093/occmed/kqu104 15. Lapierre LM, Spector PE, Leck JD. Sexual versus nonsexual workplace aggression and victims’ overall job satisfaction: a meta-analysis. J Occup Health Psychol 2005;10:155–169. 16. Hershcovis MS, Barling, J. Towards a multi-foci approach to workplace aggression: a meta-analytic review of outcomes from different perpetrators. J Organ Behav 2010;31:24–44. 17. Faragher ...