Real-Time Joint Coupling of the Spine for Inverse Kinematics

In this paper we propose a simple model for the coupling behavior of the human spine for an inverse kinematics framework. Our spine model exhibits anatomically correct motions of the vertebrae of virtual mannequins by coupling standard swing and revolute joint models. The adjustement of the joints is made with several simple (in)equality constraints, resulting in a reduction of the solution space dimensionality for the inverse kinematics solver. By reducing the solution space dimensionality to feasible spine shapes, we prevent the inverse kinematics algorithm from providing infeasible postures for the spine.In this paper, we exploit how to apply these simple constraints to the human spine by a strict decoupling of the swing and torsion motion of the vertebrae. We demonstrate the validity of our approach on various experiments.

Internet Service Provider Liability - The Swiss Perspective

Switzerland does not have a concrete legal framework dealing with rights and obligations of ISPs; however, legal doctrine and practice apply similar principles as stated in the E-Commerce Directive of the EU. The liability of ISPs depends on the “closeness” to the content. Whereas in cases of solely transmitting services the risk of liability for illegal information is remote and the duty of ISPs is limited to a take-down, content, host and link providers (in cases of moder- ated newsgroups) can become liable if the information made available is not controlled.