Hiroya Nakao, 2 Sho Yasui, Masashi Ota, 4 Kensuke Arai, and Yoji Kawamura Department of Systems and Control Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106, USA Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, Tokyo 152-8552, Japan Ricoh Company Ltd., J...

We describe a numerical method for computing optimal trajectories for fully actuated mechanical systems. This method uses the fact that fully actuated mechanical systems are diierentially at with conngura-tion variables as at outputs to parametrize the system trajectories by connguration space trajectories. Our approach has the advantage that the system ODEs are implicitly satissed and hence we...

We use the Earth Simulator to model seismic wave propagation resulting from large earthquakes on a global scale. Simulations are conducted based upon the spectral-element method, a high-degree finiteelement technique. We include the full complexity of the Earth, i.e., a three-dimensional seismic wave velocity and density structure, a 3-D crustal model, the elliptical figure of the Earth as well...

Faculty: Y.H. Chen, Associate Professor, School of Mechanical Engineering (COE) R.F. Fox, Regents’ Professor, Chair of School of Physics (COS) R. Grigoriev, Assistant Professor, School of Physics (COS) E.M. Harrell, Professor, School of Mathematics(COS) C.A. Klausmeier, Assistant Professor, School of Biology (COS) P.J. Mucha, Assistant Professor, School of Mathematics (COS) G.P. Neitzel, Profes...