An innovative multiple isolation building system is proposed, and the influence of hardening in seismic isolators on the response of a multiple isolation building is investigated by shaking table vibration tests for a scaled structural model. From the observation in recent earthquake disasters in far-fault ground motions, e.g., the 2011 off the Pacific coast of Tohoku earthquake, a significant ...

The interactions between dislocations and point defects have been studied in magnesium containing 100 p.p.m. of impurity atoms. The experiments where conducted on one hand by measuring the ultrasonic attenuation changes due to a bias stress and on the other hand by measuring the internal friction on a torsion pendulum working at 2 Hz. INTRODUCTION Since few last years the studies of variation o...

Integrated optical isolators will become necessary as optical networks continue to grow and the need for monolithic integration and greater functionality increases. This thesis presents a design for a polarization independent isolator which can be monolithically integrated with semiconductor lasers. Theory and measurements are used to select a material for the isolator. A polarization independe...