The present study sets out to integrate the performance-based seismic design approach with the connection topology optimization method. Performance-based connection topology optimization concept aims to simultaneously optimize the size of members and the type of connections with respect to the framework of performance-based seismic design. This new optimization concept is carried out for unbrac...

In this paper, we study the 66 Cartesian stiiness matrix. We show that the stiiness of a rigid body subjected to conservative forces and moments is described by a (0; 2) tensor which is the Hessian of the potential function. The key observation of the paper is that since the Hessian depends on the choice of an aane connection in the task space, so will the Carte-sian stiiness matrix. Further, t...

The Cayley map for the rotation group SO(3) is extended to a map from the Lie algebra of the group of rigid body motions SE(3) to the group itself. This is done in several inequivalent ways. A close connection between these maps and linear line complexes associated with a finite screw motions is found.

In a new version of the Unix operating system, a flexible coroutine-based design replaces the traditional rigid connection between processes and terminals or networks. Processing modules may be inserted dynamically into the stream that connects a user’s program to a device. Programs may also connect directly to programs, providing interprocess communication.

The connection between the balance structure of the evolution equations of higher order fluxes and different forms of the entropy current is investigated on the example of rigid heat conductors. It is argued that Non-Equilibrium Thermodynamics with dynamic degrees of freedom gives a proper general frame of these investigations. Thermodynamic closure relations are derived.

Let k be a perfect field, and X an irreducible smooth projective curve over k. We give criterion for vector bundle to admit logarithmic connection singular finite subset of with given residues, where residues are assumed rigid.