The paper deals with the determination of optimal force-closure grasps for 2D polygonal objects. The problem is analyzed and some intrinsic properties of grasps are determined. The approach is applied to the determination of the position of a fourth finger given the positions of three other fingers. Moreover, the range of solutions that allow the force-closure property as well as the optimal va...

Many force–gradient explicit symplectic integration algorithms have been designed for the Hamiltonian H=T(p)+V(q) with kinetic energy T(p)=p2/2 in existing references. When a operator is appropriately adjusted as new operator, it still suitable class of problems H=K(p,q)+V(q) integrable part K(p,q)=?i=1n?j=1naijpipj+?i=1nbipi, where aij=aij(q) and bi=bi(q) are functions coordinates q. The newly...

New advances in molecular dynamics and Monte Carlo simulations have led to impressive increases in the speed of sampling phase space for complex biological systems. These methods have been combined with new fast algorithms for computing long range electrostatic interactions for new polarizable force fields. In addition, new methods for sampling low energy molecular conformations allow the rapid...

We report on the determination of the Yarkovsky effect among Near Earth Asteroids (NEAs). The related recoil force is modeled through an empirical transverse acceleration resulting in a secular semimajor axis drift. For a successful determination we use a precise dynamical model including perturber asteroids and planetary relativistic terms. We found a few tens of object with a significant dete...